diff options
Diffstat (limited to 'x/binutils/bfd/elf64-ppc.c')
| -rw-r--r-- | x/binutils/bfd/elf64-ppc.c | 9024 |
1 files changed, 9024 insertions, 0 deletions
diff --git a/x/binutils/bfd/elf64-ppc.c b/x/binutils/bfd/elf64-ppc.c new file mode 100644 index 0000000..a0d81d0 --- /dev/null +++ b/x/binutils/bfd/elf64-ppc.c @@ -0,0 +1,9024 @@ +/* PowerPC64-specific support for 64-bit ELF. + Copyright 1999, 2000, 2001, 2002, 2003, 2004 + Free Software Foundation, Inc. + Written by Linus Nordberg, Swox AB <info@swox.com>, + based on elf32-ppc.c by Ian Lance Taylor. + Largely rewritten by Alan Modra <amodra@bigpond.net.au> + + This file is part of BFD, the Binary File Descriptor library. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* The 64-bit PowerPC ELF ABI may be found at + http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and + http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ + +#include "bfd.h" +#include "sysdep.h" +#include "bfdlink.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/ppc64.h" +#include "elf64-ppc.h" + +static bfd_reloc_status_type ppc64_elf_ha_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_brtaken_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_sectoff_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_toc_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_toc_ha_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_toc64_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +static bfd_reloc_status_type ppc64_elf_unhandled_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); + + +#define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec +#define TARGET_LITTLE_NAME "elf64-powerpcle" +#define TARGET_BIG_SYM bfd_elf64_powerpc_vec +#define TARGET_BIG_NAME "elf64-powerpc" +#define ELF_ARCH bfd_arch_powerpc +#define ELF_MACHINE_CODE EM_PPC64 +#define ELF_MAXPAGESIZE 0x10000 +#define elf_info_to_howto ppc64_elf_info_to_howto + +#define elf_backend_want_got_sym 0 +#define elf_backend_want_plt_sym 0 +#define elf_backend_plt_alignment 3 +#define elf_backend_plt_not_loaded 1 +#define elf_backend_got_symbol_offset 0 +#define elf_backend_got_header_size 8 +#define elf_backend_can_gc_sections 1 +#define elf_backend_can_refcount 1 +#define elf_backend_rela_normal 1 + +#define bfd_elf64_mkobject ppc64_elf_mkobject +#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup +#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data +#define bfd_elf64_new_section_hook ppc64_elf_new_section_hook +#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create +#define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free + +#define elf_backend_object_p ppc64_elf_object_p +#define elf_backend_grok_prstatus ppc64_elf_grok_prstatus +#define elf_backend_grok_psinfo ppc64_elf_grok_psinfo +#define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections +#define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol +#define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook +#define elf_backend_check_relocs ppc64_elf_check_relocs +#define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook +#define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol +#define elf_backend_hide_symbol ppc64_elf_hide_symbol +#define elf_backend_always_size_sections ppc64_elf_func_desc_adjust +#define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections +#define elf_backend_relocate_section ppc64_elf_relocate_section +#define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol +#define elf_backend_reloc_type_class ppc64_elf_reloc_type_class +#define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections +#define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook +#define elf_backend_special_sections ppc64_elf_special_sections + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" + +/* The size in bytes of an entry in the procedure linkage table. */ +#define PLT_ENTRY_SIZE 24 + +/* The initial size of the plt reserved for the dynamic linker. */ +#define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE + +/* TOC base pointers offset from start of TOC. */ +#define TOC_BASE_OFF 0x8000 + +/* Offset of tp and dtp pointers from start of TLS block. */ +#define TP_OFFSET 0x7000 +#define DTP_OFFSET 0x8000 + +/* .plt call stub instructions. The normal stub is like this, but + sometimes the .plt entry crosses a 64k boundary and we need to + insert an addis to adjust r12. */ +#define PLT_CALL_STUB_SIZE (7*4) +#define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ +#define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */ +#define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */ +#define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ +#define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ + /* ld %r11,xxx+16@l(%r12) */ +#define BCTR 0x4e800420 /* bctr */ + + +#define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ +#define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ + +#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ + +/* glink call stub instructions. We enter with the index in R0, and the + address of glink entry in CTR. From that, we can calculate PLT0. */ +#define GLINK_CALL_STUB_SIZE (16*4) +#define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */ +#define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */ +#define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */ +#define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */ +#define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */ +#define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */ +#define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */ + /* sub %r12,%r12,%r11 */ +#define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */ +#define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ + /* ld %r11,xxx@l(%r12) */ +#define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */ + /* ld %r2,8(%r12) */ + /* mtctr %r11 */ + /* ld %r11,16(%r12) */ + /* bctr */ + +/* Pad with this. */ +#define NOP 0x60000000 + +/* Some other nops. */ +#define CROR_151515 0x4def7b82 +#define CROR_313131 0x4ffffb82 + +/* .glink entries for the first 32k functions are two instructions. */ +#define LI_R0_0 0x38000000 /* li %r0,0 */ +#define B_DOT 0x48000000 /* b . */ + +/* After that, we need two instructions to load the index, followed by + a branch. */ +#define LIS_R0_0 0x3c000000 /* lis %r0,0 */ +#define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ + +/* Instructions to save and restore floating point regs. */ +#define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ +#define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ +#define BLR 0x4e800020 /* blr */ + +/* Since .opd is an array of descriptors and each entry will end up + with identical R_PPC64_RELATIVE relocs, there is really no need to + propagate .opd relocs; The dynamic linker should be taught to + relocate .opd without reloc entries. */ +#ifndef NO_OPD_RELOCS +#define NO_OPD_RELOCS 0 +#endif + +#define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) + +/* Relocation HOWTO's. */ +static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; + +static reloc_howto_type ppc64_elf_howto_raw[] = { + /* This reloc does nothing. */ + HOWTO (R_PPC64_NONE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A standard 32 bit relocation. */ + HOWTO (R_PPC64_ADDR32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 26 bit branch; the lower two bits must be zero. + FIXME: we don't check that, we just clear them. */ + HOWTO (R_PPC64_ADDR24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR24", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x03fffffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A standard 16 bit relocation. */ + HOWTO (R_PPC64_ADDR16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit relocation without overflow. */ + HOWTO (R_PPC64_ADDR16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Bits 16-31 of an address. */ + HOWTO (R_PPC64_ADDR16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Bits 16-31 of an address, plus 1 if the contents of the low 16 + bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 16 bit branch; the lower two bits must be zero. + FIXME: we don't check that, we just clear them. */ + HOWTO (R_PPC64_ADDR14, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR14", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 16 bit branch, for which bit 10 should be set to + indicate that the branch is expected to be taken. The lower two + bits must be zero. */ + HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_ADDR14_BRTAKEN",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* An absolute 16 bit branch, for which bit 10 should be set to + indicate that the branch is not expected to be taken. The lower + two bits must be zero. */ + HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_ADDR14_BRNTAKEN",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A relative 26 bit branch; the lower two bits must be zero. */ + HOWTO (R_PPC64_REL24, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL24", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x03fffffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 16 bit branch; the lower two bits must be zero. */ + HOWTO (R_PPC64_REL14, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL14", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 16 bit branch. Bit 10 should be set to indicate that + the branch is expected to be taken. The lower two bits must be + zero. */ + HOWTO (R_PPC64_REL14_BRTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_REL14_BRTAKEN", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* A relative 16 bit branch. Bit 10 should be set to indicate that + the branch is not expected to be taken. The lower two bits must + be zero. */ + HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_brtaken_reloc, /* special_function */ + "R_PPC64_REL14_BRNTAKEN",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0x0000fffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the + symbol. */ + HOWTO (R_PPC64_GOT16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for + the symbol. */ + HOWTO (R_PPC64_GOT16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* This is used only by the dynamic linker. The symbol should exist + both in the object being run and in some shared library. The + dynamic linker copies the data addressed by the symbol from the + shared library into the object, because the object being + run has to have the data at some particular address. */ + HOWTO (R_PPC64_COPY, /* type */ + 0, /* rightshift */ + 0, /* this one is variable size */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_COPY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR64, but used when setting global offset table + entries. */ + HOWTO (R_PPC64_GLOB_DAT, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GLOB_DAT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Created by the link editor. Marks a procedure linkage table + entry for a symbol. */ + HOWTO (R_PPC64_JMP_SLOT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_JMP_SLOT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Used only by the dynamic linker. When the object is run, this + doubleword64 is set to the load address of the object, plus the + addend. */ + HOWTO (R_PPC64_RELATIVE, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_RELATIVE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR32, but may be unaligned. */ + HOWTO (R_PPC64_UADDR32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_UADDR32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but may be unaligned. */ + HOWTO (R_PPC64_UADDR16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_UADDR16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 32-bit PC relative. */ + HOWTO (R_PPC64_REL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + /* FIXME: Verify. Was complain_overflow_bitfield. */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 32-bit relocation to the symbol's procedure linkage table. */ + HOWTO (R_PPC64_PLT32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 32-bit PC relative relocation to the symbol's procedure linkage table. + FIXME: R_PPC64_PLTREL32 not supported. */ + HOWTO (R_PPC64_PLTREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTREL32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for + the symbol. */ + HOWTO (R_PPC64_PLT16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16-bit section relative relocation. */ + HOWTO (R_PPC64_SECTOFF, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF, but no overflow warning. */ + HOWTO (R_PPC64_SECTOFF_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16-bit upper half section relative relocation. */ + HOWTO (R_PPC64_SECTOFF_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16-bit upper half adjusted section relative relocation. */ + HOWTO (R_PPC64_SECTOFF_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_ha_reloc, /* special_function */ + "R_PPC64_SECTOFF_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_REL24 without touching the two least significant bits. */ + HOWTO (R_PPC64_REL30, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 30, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL30", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffffffc, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ + + /* A standard 64-bit relocation. */ + HOWTO (R_PPC64_ADDR64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 32-47 of an address. */ + HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHER", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 32-47 of an address, plus 1 if the contents of the low + 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHERA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 48-63 of an address. */ + HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHEST", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* The bits 48-63 of an address, plus 1 if the contents of the low + 16 bits, treated as a signed number, is negative. */ + HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_ha_reloc, /* special_function */ + "R_PPC64_ADDR16_HIGHESTA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like ADDR64, but may be unaligned. */ + HOWTO (R_PPC64_UADDR64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_UADDR64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 64-bit relative relocation. */ + HOWTO (R_PPC64_REL64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 64-bit relocation to the symbol's procedure linkage table. */ + HOWTO (R_PPC64_PLT64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 64-bit PC relative relocation to the symbol's procedure linkage + table. */ + /* FIXME: R_PPC64_PLTREL64 not supported. */ + HOWTO (R_PPC64_PLTREL64, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTREL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation. */ + + /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ + HOWTO (R_PPC64_TOC16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation without overflow. */ + + /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation, high 16 bits. */ + + /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the + contents of the low 16 bits, treated as a signed number, is + negative. */ + + /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ + HOWTO (R_PPC64_TOC16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_ha_reloc, /* special_function */ + "R_PPC64_TOC16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 64-bit relocation; insert value of TOC base (.TOC.). */ + + /* R_PPC64_TOC 51 doubleword64 .TOC. */ + HOWTO (R_PPC64_TOC, /* type */ + 0, /* rightshift */ + 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_toc64_reloc, /* special_function */ + "R_PPC64_TOC", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_GOT16, but also informs the link editor that the + value to relocate may (!) refer to a PLT entry which the link + editor (a) may replace with the symbol value. If the link editor + is unable to fully resolve the symbol, it may (b) create a PLT + entry and store the address to the new PLT entry in the GOT. + This permits lazy resolution of function symbols at run time. + The link editor may also skip all of this and just (c) emit a + R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ + /* FIXME: R_PPC64_PLTGOT16 not implemented. */ + HOWTO (R_PPC64_PLTGOT16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16, but without overflow. */ + /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ + HOWTO (R_PPC64_PLTGOT16_LO, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ + /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ + HOWTO (R_PPC64_PLTGOT16_HI, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus + 1 if the contents of the low 16 bits, treated as a signed number, + is negative. */ + /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ + HOWTO (R_PPC64_PLTGOT16_HA, /* type */ + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ + HOWTO (R_PPC64_ADDR16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR16_LO_DS",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_GOT16, but for instructions with a DS field. */ + HOWTO (R_PPC64_GOT16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_GOT16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_PLT16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLT16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ + HOWTO (R_PPC64_SECTOFF_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_sectoff_reloc, /* special_function */ + "R_PPC64_SECTOFF_LO_DS",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_TOC16, but for instructions with a DS field. */ + HOWTO (R_PPC64_TOC16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ + HOWTO (R_PPC64_TOC16_LO_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_toc_reloc, /* special_function */ + "R_PPC64_TOC16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ + /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ + HOWTO (R_PPC64_PLTGOT16_DS, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ + /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ + HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_PLTGOT16_LO_DS",/* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Marker reloc for TLS. */ + HOWTO (R_PPC64_TLS, + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TLS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Computes the load module index of the load module that contains the + definition of its TLS sym. */ + HOWTO (R_PPC64_DTPMOD64, + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPMOD64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Computes a dtv-relative displacement, the difference between the value + of sym+add and the base address of the thread-local storage block that + contains the definition of sym, minus 0x8000. */ + HOWTO (R_PPC64_DTPREL64, + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit dtprel reloc. */ + HOWTO (R_PPC64_DTPREL16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16, but no overflow. */ + HOWTO (R_PPC64_DTPREL16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HI, but next higher group of 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHER, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHER", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHERA, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHERA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHEST, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHEST", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ + HOWTO (R_PPC64_DTPREL16_HIGHESTA, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_HIGHESTA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16, but for insns with a DS field. */ + HOWTO (R_PPC64_DTPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like DTPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_DTPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_DTPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Computes a tp-relative displacement, the difference between the value of + sym+add and the value of the thread pointer (r13). */ + HOWTO (R_PPC64_TPREL64, + 0, /* rightshift */ + 4, /* size (0 = byte, 1 = short, 2 = long) */ + 64, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL64", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + ONES (64), /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit tprel reloc. */ + HOWTO (R_PPC64_TPREL16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16, but no overflow. */ + HOWTO (R_PPC64_TPREL16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_TPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_TPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HI, but next higher group of 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHER, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHER", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHERA, + 32, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHERA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHEST, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHEST", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ + HOWTO (R_PPC64_TPREL16_HIGHESTA, + 48, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_HIGHESTA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16, but for insns with a DS field. */ + HOWTO (R_PPC64_TPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like TPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_TPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_TPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates two contiguous entries in the GOT to hold a tls_index structure, + with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset + to the first entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_TLSGD16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSGD16, but no overflow. */ + HOWTO (R_PPC64_GOT_TLSGD16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_TLSGD16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_TLSGD16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSGD16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates two contiguous entries in the GOT to hold a tls_index structure, + with values (sym+add)@dtpmod and zero, and computes the offset to the + first entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_TLSLD16, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSLD16, but no overflow. */ + HOWTO (R_PPC64_GOT_TLSLD16_LO, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16_LO", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_TLSLD16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_TLSLD16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TLSLD16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes + the offset to the entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_DTPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_DTPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_GOT_DTPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_DTPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_DTPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_DTPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the + offset to the entry relative to the TOC base (r2). */ + HOWTO (R_PPC64_GOT_TPREL16_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TPREL16_DS, but no overflow. */ + HOWTO (R_PPC64_GOT_TPREL16_LO_DS, + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_LO_DS", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ + HOWTO (R_PPC64_GOT_TPREL16_HI, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_HI", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ + HOWTO (R_PPC64_GOT_TPREL16_HA, + 16, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + ppc64_elf_unhandled_reloc, /* special_function */ + "R_PPC64_GOT_TPREL16_HA", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy. */ + HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC64_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage. */ + HOWTO (R_PPC64_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_PPC64_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ +}; + + +/* Initialize the ppc64_elf_howto_table, so that linear accesses can + be done. */ + +static void +ppc_howto_init (void) +{ + unsigned int i, type; + + for (i = 0; + i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); + i++) + { + type = ppc64_elf_howto_raw[i].type; + BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) + / sizeof (ppc64_elf_howto_table[0]))); + ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; + } +} + +static reloc_howto_type * +ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + enum elf_ppc64_reloc_type r = R_PPC64_NONE; + + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + /* Initialize howto table if needed. */ + ppc_howto_init (); + + switch (code) + { + default: + return NULL; + + case BFD_RELOC_NONE: r = R_PPC64_NONE; + break; + case BFD_RELOC_32: r = R_PPC64_ADDR32; + break; + case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; + break; + case BFD_RELOC_16: r = R_PPC64_ADDR16; + break; + case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; + break; + case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; + break; + case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; + break; + case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; + break; + case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; + break; + case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; + break; + case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; + break; + case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; + break; + case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; + break; + case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; + break; + case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; + break; + case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; + break; + case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; + break; + case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; + break; + case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; + break; + case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; + break; + case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; + break; + case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; + break; + case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; + break; + case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; + break; + case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; + break; + case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; + break; + case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; + break; + case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; + break; + case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; + break; + case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; + break; + case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; + break; + case BFD_RELOC_64: r = R_PPC64_ADDR64; + break; + case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; + break; + case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; + break; + case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; + break; + case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; + break; + case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; + break; + case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; + break; + case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; + break; + case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; + break; + case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; + break; + case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; + break; + case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; + break; + case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; + break; + case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; + break; + case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; + break; + case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; + break; + case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; + break; + case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; + break; + case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; + break; + case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; + break; + case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; + break; + case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; + break; + case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; + break; + case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; + break; + case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; + break; + case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; + break; + case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; + break; + case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; + break; + case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; + break; + case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; + break; + case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; + break; + case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; + break; + case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; + break; + case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; + break; + case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; + break; + case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; + break; + case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; + break; + case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; + break; + case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; + break; + case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; + break; + case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; + break; + case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; + break; + case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; + break; + case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; + break; + case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; + break; + case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; + break; + case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; + break; + case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; + break; + case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; + break; + case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; + break; + case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; + break; + case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; + break; + case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; + break; + case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; + break; + case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; + break; + case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; + break; + case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; + break; + case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; + break; + case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; + break; + } + + return ppc64_elf_howto_table[r]; +}; + +/* Set the howto pointer for a PowerPC ELF reloc. */ + +static void +ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, + Elf_Internal_Rela *dst) +{ + unsigned int type; + + /* Initialize howto table if needed. */ + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + ppc_howto_init (); + + type = ELF64_R_TYPE (dst->r_info); + BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) + / sizeof (ppc64_elf_howto_table[0]))); + cache_ptr->howto = ppc64_elf_howto_table[type]; +} + +/* Handle the R_PPC64_ADDR16_HA and similar relocs. */ + +static bfd_reloc_status_type +ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + /* Adjust the addend for sign extension of the low 16 bits. + We won't actually be using the low 16 bits, so trashing them + doesn't matter. */ + reloc_entry->addend += 0x8000; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + long insn; + enum elf_ppc64_reloc_type r_type; + bfd_size_type octets; + /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ + bfd_boolean is_power4 = FALSE; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + octets = reloc_entry->address * bfd_octets_per_byte (abfd); + insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); + insn &= ~(0x01 << 21); + r_type = reloc_entry->howto->type; + if (r_type == R_PPC64_ADDR14_BRTAKEN + || r_type == R_PPC64_REL14_BRTAKEN) + insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ + + if (is_power4) + { + /* Set 'a' bit. This is 0b00010 in BO field for branch + on CR(BI) insns (BO == 001at or 011at), and 0b01000 + for branch on CTR insns (BO == 1a00t or 1a01t). */ + if ((insn & (0x14 << 21)) == (0x04 << 21)) + insn |= 0x02 << 21; + else if ((insn & (0x14 << 21)) == (0x10 << 21)) + insn |= 0x08 << 21; + else + return bfd_reloc_continue; + } + else + { + bfd_vma target = 0; + bfd_vma from; + + if (!bfd_is_com_section (symbol->section)) + target = symbol->value; + target += symbol->section->output_section->vma; + target += symbol->section->output_offset; + target += reloc_entry->addend; + + from = (reloc_entry->address + + input_section->output_offset + + input_section->output_section->vma); + + /* Invert 'y' bit if not the default. */ + if ((bfd_signed_vma) (target - from) < 0) + insn ^= 0x01 << 21; + } + bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + /* Subtract the symbol section base address. */ + reloc_entry->addend -= symbol->section->output_section->vma; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + /* Subtract the symbol section base address. */ + reloc_entry->addend -= symbol->section->output_section->vma; + + /* Adjust the addend for sign extension of the low 16 bits. */ + reloc_entry->addend += 0x8000; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + bfd_vma TOCstart; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + TOCstart = _bfd_get_gp_value (input_section->output_section->owner); + if (TOCstart == 0) + TOCstart = ppc64_elf_toc (input_section->output_section->owner); + + /* Subtract the TOC base address. */ + reloc_entry->addend -= TOCstart + TOC_BASE_OFF; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + bfd_vma TOCstart; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + TOCstart = _bfd_get_gp_value (input_section->output_section->owner); + if (TOCstart == 0) + TOCstart = ppc64_elf_toc (input_section->output_section->owner); + + /* Subtract the TOC base address. */ + reloc_entry->addend -= TOCstart + TOC_BASE_OFF; + + /* Adjust the addend for sign extension of the low 16 bits. */ + reloc_entry->addend += 0x8000; + return bfd_reloc_continue; +} + +static bfd_reloc_status_type +ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + bfd_vma TOCstart; + bfd_size_type octets; + + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + TOCstart = _bfd_get_gp_value (input_section->output_section->owner); + if (TOCstart == 0) + TOCstart = ppc64_elf_toc (input_section->output_section->owner); + + octets = reloc_entry->address * bfd_octets_per_byte (abfd); + bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); + return bfd_reloc_ok; +} + +static bfd_reloc_status_type +ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, + void *data, asection *input_section, + bfd *output_bfd, char **error_message) +{ + /* If this is a relocatable link (output_bfd test tells us), just + call the generic function. Any adjustment will be done at final + link time. */ + if (output_bfd != NULL) + return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + if (error_message != NULL) + { + static char buf[60]; + sprintf (buf, "generic linker can't handle %s", + reloc_entry->howto->name); + *error_message = buf; + } + return bfd_reloc_dangerous; +} + +struct ppc64_elf_obj_tdata +{ + struct elf_obj_tdata elf; + + /* Shortcuts to dynamic linker sections. */ + asection *got; + asection *relgot; + + /* TLS local dynamic got entry handling. Suppose for multiple GOT + sections means we potentially need one of these for each input bfd. */ + union { + bfd_signed_vma refcount; + bfd_vma offset; + } tlsld_got; +}; + +#define ppc64_elf_tdata(bfd) \ + ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) + +#define ppc64_tlsld_got(bfd) \ + (&ppc64_elf_tdata (bfd)->tlsld_got) + +/* Override the generic function because we store some extras. */ + +static bfd_boolean +ppc64_elf_mkobject (bfd *abfd) +{ + bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata); + abfd->tdata.any = bfd_zalloc (abfd, amt); + if (abfd->tdata.any == NULL) + return FALSE; + return TRUE; +} + +/* Fix bad default arch selected for a 64 bit input bfd when the + default is 32 bit. */ + +static bfd_boolean +ppc64_elf_object_p (bfd *abfd) +{ + if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32) + { + Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); + + if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) + { + /* Relies on arch after 32 bit default being 64 bit default. */ + abfd->arch_info = abfd->arch_info->next; + BFD_ASSERT (abfd->arch_info->bits_per_word == 64); + } + } + return TRUE; +} + +/* Support for core dump NOTE sections. */ + +static bfd_boolean +ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) +{ + size_t offset, raw_size; + + if (note->descsz != 504) + return FALSE; + + /* pr_cursig */ + elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); + + /* pr_pid */ + elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32); + + /* pr_reg */ + offset = 112; + raw_size = 384; + + /* Make a ".reg/999" section. */ + return _bfd_elfcore_make_pseudosection (abfd, ".reg", + raw_size, note->descpos + offset); +} + +static bfd_boolean +ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) +{ + if (note->descsz != 136) + return FALSE; + + elf_tdata (abfd)->core_program + = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); + elf_tdata (abfd)->core_command + = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); + + return TRUE; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ + +static bfd_boolean +ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + /* Check if we have the same endianess. */ + if (ibfd->xvec->byteorder != obfd->xvec->byteorder + && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN + && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) + { + const char *msg; + + if (bfd_big_endian (ibfd)) + msg = _("%s: compiled for a big endian system " + "and target is little endian"); + else + msg = _("%s: compiled for a little endian system " + "and target is big endian"); + + (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd)); + + bfd_set_error (bfd_error_wrong_format); + return FALSE; + } + + return TRUE; +} + +/* Add extra PPC sections. */ + +static struct bfd_elf_special_section const ppc64_elf_special_sections[]= +{ + { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, + { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, + { ".plt", 4, 0, SHT_NOBITS, 0 }, + { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, + { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, + { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, + { NULL, 0, 0, 0, 0 } +}; + +struct _ppc64_elf_section_data +{ + struct bfd_elf_section_data elf; + + /* An array with one entry for each opd function descriptor. */ + union + { + /* Points to the function code section for local opd entries. */ + asection **func_sec; + /* After editing .opd, adjust references to opd local syms. */ + long *adjust; + } opd; + + /* An array for toc sections, indexed by offset/8. + Specifies the relocation symbol index used at a given toc offset. */ + unsigned *t_symndx; +}; + +#define ppc64_elf_section_data(sec) \ + ((struct _ppc64_elf_section_data *) elf_section_data (sec)) + +static bfd_boolean +ppc64_elf_new_section_hook (bfd *abfd, asection *sec) +{ + struct _ppc64_elf_section_data *sdata; + bfd_size_type amt = sizeof (*sdata); + + sdata = bfd_zalloc (abfd, amt); + if (sdata == NULL) + return FALSE; + sec->used_by_bfd = sdata; + + return _bfd_elf_new_section_hook (abfd, sec); +} + +/* The following functions are specific to the ELF linker, while + functions above are used generally. Those named ppc64_elf_* are + called by the main ELF linker code. They appear in this file more + or less in the order in which they are called. eg. + ppc64_elf_check_relocs is called early in the link process, + ppc64_elf_finish_dynamic_sections is one of the last functions + called. + + PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that + functions have both a function code symbol and a function descriptor + symbol. A call to foo in a relocatable object file looks like: + + . .text + . x: + . bl .foo + . nop + + The function definition in another object file might be: + + . .section .opd + . foo: .quad .foo + . .quad .TOC.@tocbase + . .quad 0 + . + . .text + . .foo: blr + + When the linker resolves the call during a static link, the branch + unsurprisingly just goes to .foo and the .opd information is unused. + If the function definition is in a shared library, things are a little + different: The call goes via a plt call stub, the opd information gets + copied to the plt, and the linker patches the nop. + + . x: + . bl .foo_stub + . ld 2,40(1) + . + . + . .foo_stub: + . addis 12,2,Lfoo@toc@ha # in practice, the call stub + . addi 12,12,Lfoo@toc@l # is slightly optimized, but + . std 2,40(1) # this is the general idea + . ld 11,0(12) + . ld 2,8(12) + . mtctr 11 + . ld 11,16(12) + . bctr + . + . .section .plt + . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) + + The "reloc ()" notation is supposed to indicate that the linker emits + an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd + copying. + + What are the difficulties here? Well, firstly, the relocations + examined by the linker in check_relocs are against the function code + sym .foo, while the dynamic relocation in the plt is emitted against + the function descriptor symbol, foo. Somewhere along the line, we need + to carefully copy dynamic link information from one symbol to the other. + Secondly, the generic part of the elf linker will make .foo a dynamic + symbol as is normal for most other backends. We need foo dynamic + instead, at least for an application final link. However, when + creating a shared library containing foo, we need to have both symbols + dynamic so that references to .foo are satisfied during the early + stages of linking. Otherwise the linker might decide to pull in a + definition from some other object, eg. a static library. */ + +/* The linker needs to keep track of the number of relocs that it + decides to copy as dynamic relocs in check_relocs for each symbol. + This is so that it can later discard them if they are found to be + unnecessary. We store the information in a field extending the + regular ELF linker hash table. */ + +struct ppc_dyn_relocs +{ + struct ppc_dyn_relocs *next; + + /* The input section of the reloc. */ + asection *sec; + + /* Total number of relocs copied for the input section. */ + bfd_size_type count; + + /* Number of pc-relative relocs copied for the input section. */ + bfd_size_type pc_count; +}; + +/* Track GOT entries needed for a given symbol. We might need more + than one got entry per symbol. */ +struct got_entry +{ + struct got_entry *next; + + /* The symbol addend that we'll be placing in the GOT. */ + bfd_vma addend; + + /* Unlike other ELF targets, we use separate GOT entries for the same + symbol referenced from different input files. This is to support + automatic multiple TOC/GOT sections, where the TOC base can vary + from one input file to another. + + Point to the BFD owning this GOT entry. */ + bfd *owner; + + /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, + TLS_TPREL or TLS_DTPREL for tls entries. */ + char tls_type; + + /* Reference count until size_dynamic_sections, GOT offset thereafter. */ + union + { + bfd_signed_vma refcount; + bfd_vma offset; + } got; +}; + +/* The same for PLT. */ +struct plt_entry +{ + struct plt_entry *next; + + bfd_vma addend; + + union + { + bfd_signed_vma refcount; + bfd_vma offset; + } plt; +}; + +/* Of those relocs that might be copied as dynamic relocs, this macro + selects those that must be copied when linking a shared library, + even when the symbol is local. */ + +#define MUST_BE_DYN_RELOC(RTYPE) \ + ((RTYPE) != R_PPC64_REL32 \ + && (RTYPE) != R_PPC64_REL64 \ + && (RTYPE) != R_PPC64_REL30) + +/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid + copying dynamic variables from a shared lib into an app's dynbss + section, and instead use a dynamic relocation to point into the + shared lib. With code that gcc generates, it's vital that this be + enabled; In the PowerPC64 ABI, the address of a function is actually + the address of a function descriptor, which resides in the .opd + section. gcc uses the descriptor directly rather than going via the + GOT as some other ABI's do, which means that initialized function + pointers must reference the descriptor. Thus, a function pointer + initialized to the address of a function in a shared library will + either require a copy reloc, or a dynamic reloc. Using a copy reloc + redefines the function descriptor symbol to point to the copy. This + presents a problem as a plt entry for that function is also + initialized from the function descriptor symbol and the copy reloc + may not be initialized first. */ +#define ELIMINATE_COPY_RELOCS 1 + +/* Section name for stubs is the associated section name plus this + string. */ +#define STUB_SUFFIX ".stub" + +/* Linker stubs. + ppc_stub_long_branch: + Used when a 14 bit branch (or even a 24 bit branch) can't reach its + destination, but a 24 bit branch in a stub section will reach. + . b dest + + ppc_stub_plt_branch: + Similar to the above, but a 24 bit branch in the stub section won't + reach its destination. + . addis %r12,%r2,xxx@toc@ha + . ld %r11,xxx@toc@l(%r12) + . mtctr %r11 + . bctr + + ppc_stub_plt_call: + Used to call a function in a shared library. + . addis %r12,%r2,xxx@toc@ha + . std %r2,40(%r1) + . ld %r11,xxx+0@toc@l(%r12) + . ld %r2,xxx+8@toc@l(%r12) + . mtctr %r11 + . ld %r11,xxx+16@toc@l(%r12) + . bctr + + ppc_stub_long_branch and ppc_stub_plt_branch may also have additional + code to adjust the value and save r2 to support multiple toc sections. + A ppc_stub_long_branch with an r2 offset looks like: + . std %r2,40(%r1) + . addis %r2,%r2,off@ha + . addi %r2,%r2,off@l + . b dest + + A ppc_stub_plt_branch with an r2 offset looks like: + . std %r2,40(%r1) + . addis %r12,%r2,xxx@toc@ha + . ld %r11,xxx@toc@l(%r12) + . addis %r2,%r2,off@ha + . addi %r2,%r2,off@l + . mtctr %r11 + . bctr +*/ + +enum ppc_stub_type { + ppc_stub_none, + ppc_stub_long_branch, + ppc_stub_long_branch_r2off, + ppc_stub_plt_branch, + ppc_stub_plt_branch_r2off, + ppc_stub_plt_call +}; + +struct ppc_stub_hash_entry { + + /* Base hash table entry structure. */ + struct bfd_hash_entry root; + + enum ppc_stub_type stub_type; + + /* The stub section. */ + asection *stub_sec; + + /* Offset within stub_sec of the beginning of this stub. */ + bfd_vma stub_offset; + + /* Given the symbol's value and its section we can determine its final + value when building the stubs (so the stub knows where to jump. */ + bfd_vma target_value; + asection *target_section; + + /* The symbol table entry, if any, that this was derived from. */ + struct ppc_link_hash_entry *h; + + /* And the reloc addend that this was derived from. */ + bfd_vma addend; + + /* Where this stub is being called from, or, in the case of combined + stub sections, the first input section in the group. */ + asection *id_sec; +}; + +struct ppc_branch_hash_entry { + + /* Base hash table entry structure. */ + struct bfd_hash_entry root; + + /* Offset within .branch_lt. */ + unsigned int offset; + + /* Generation marker. */ + unsigned int iter; +}; + +struct ppc_link_hash_entry +{ + struct elf_link_hash_entry elf; + + /* A pointer to the most recently used stub hash entry against this + symbol. */ + struct ppc_stub_hash_entry *stub_cache; + + /* Track dynamic relocs copied for this symbol. */ + struct ppc_dyn_relocs *dyn_relocs; + + /* Link between function code and descriptor symbols. */ + struct elf_link_hash_entry *oh; + + /* Flag function code and descriptor symbols. */ + unsigned int is_func:1; + unsigned int is_func_descriptor:1; + unsigned int is_entry:1; + + /* Whether global opd sym has been adjusted or not. */ + unsigned int adjust_done:1; + + /* Contexts in which symbol is used in the GOT (or TOC). + TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the + corresponding relocs are encountered during check_relocs. + tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to + indicate the corresponding GOT entry type is not needed. + tls_optimize may also set TLS_TPRELGD when a GD reloc turns into + a TPREL one. We use a separate flag rather than setting TPREL + just for convenience in distinguishing the two cases. */ +#define TLS_GD 1 /* GD reloc. */ +#define TLS_LD 2 /* LD reloc. */ +#define TLS_TPREL 4 /* TPREL reloc, => IE. */ +#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ +#define TLS_TLS 16 /* Any TLS reloc. */ +#define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */ +#define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */ + char tls_mask; +}; + +/* ppc64 ELF linker hash table. */ + +struct ppc_link_hash_table +{ + struct elf_link_hash_table elf; + + /* The stub hash table. */ + struct bfd_hash_table stub_hash_table; + + /* Another hash table for plt_branch stubs. */ + struct bfd_hash_table branch_hash_table; + + /* Linker stub bfd. */ + bfd *stub_bfd; + + /* Linker call-backs. */ + asection * (*add_stub_section) (const char *, asection *); + void (*layout_sections_again) (void); + + /* Array to keep track of which stub sections have been created, and + information on stub grouping. */ + struct map_stub { + /* This is the section to which stubs in the group will be attached. */ + asection *link_sec; + /* The stub section. */ + asection *stub_sec; + /* Along with elf_gp, specifies the TOC pointer used in this group. */ + bfd_vma toc_off; + } *stub_group; + + /* Support for multiple toc sections. */ + unsigned int no_multi_toc; + unsigned int multi_toc_needed; + + /* Temp used when calculating TOC pointers. */ + bfd_vma toc_curr; + + /* Highest input section id. */ + int top_id; + + /* Highest output section index. */ + int top_index; + + /* List of input sections for each output section. */ + asection **input_list; + + /* Short-cuts to get to dynamic linker sections. */ + asection *got; + asection *plt; + asection *relplt; + asection *dynbss; + asection *relbss; + asection *glink; + asection *sfpr; + asection *brlt; + asection *relbrlt; + + /* Shortcut to .__tls_get_addr. */ + struct elf_link_hash_entry *tls_get_addr; + + /* Statistics. */ + unsigned long stub_count[ppc_stub_plt_call]; + + /* Set if we should emit symbols for stubs. */ + unsigned int emit_stub_syms; + + /* Set on error. */ + unsigned int stub_error; + + /* Flag set when small branches are detected. Used to + select suitable defaults for the stub group size. */ + unsigned int has_14bit_branch; + + /* Set if we detect a reference undefined weak symbol. */ + unsigned int have_undefweak; + + /* Incremented every time we size stubs. */ + unsigned int stub_iteration; + + /* Small local sym to section mapping cache. */ + struct sym_sec_cache sym_sec; +}; + +/* Get the ppc64 ELF linker hash table from a link_info structure. */ + +#define ppc_hash_table(p) \ + ((struct ppc_link_hash_table *) ((p)->hash)) + +#define ppc_stub_hash_lookup(table, string, create, copy) \ + ((struct ppc_stub_hash_entry *) \ + bfd_hash_lookup ((table), (string), (create), (copy))) + +#define ppc_branch_hash_lookup(table, string, create, copy) \ + ((struct ppc_branch_hash_entry *) \ + bfd_hash_lookup ((table), (string), (create), (copy))) + +/* Create an entry in the stub hash table. */ + +static struct bfd_hash_entry * +stub_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = bfd_hash_newfunc (entry, table, string); + if (entry != NULL) + { + struct ppc_stub_hash_entry *eh; + + /* Initialize the local fields. */ + eh = (struct ppc_stub_hash_entry *) entry; + eh->stub_type = ppc_stub_none; + eh->stub_sec = NULL; + eh->stub_offset = 0; + eh->target_value = 0; + eh->target_section = NULL; + eh->h = NULL; + eh->id_sec = NULL; + } + + return entry; +} + +/* Create an entry in the branch hash table. */ + +static struct bfd_hash_entry * +branch_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = bfd_hash_newfunc (entry, table, string); + if (entry != NULL) + { + struct ppc_branch_hash_entry *eh; + + /* Initialize the local fields. */ + eh = (struct ppc_branch_hash_entry *) entry; + eh->offset = 0; + eh->iter = 0; + } + + return entry; +} + +/* Create an entry in a ppc64 ELF linker hash table. */ + +static struct bfd_hash_entry * +link_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = _bfd_elf_link_hash_newfunc (entry, table, string); + if (entry != NULL) + { + struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; + + eh->stub_cache = NULL; + eh->dyn_relocs = NULL; + eh->oh = NULL; + eh->is_func = 0; + eh->is_func_descriptor = 0; + eh->is_entry = 0; + eh->adjust_done = 0; + eh->tls_mask = 0; + } + + return entry; +} + +/* Create a ppc64 ELF linker hash table. */ + +static struct bfd_link_hash_table * +ppc64_elf_link_hash_table_create (bfd *abfd) +{ + struct ppc_link_hash_table *htab; + bfd_size_type amt = sizeof (struct ppc_link_hash_table); + + htab = bfd_zmalloc (amt); + if (htab == NULL) + return NULL; + + if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc)) + { + free (htab); + return NULL; + } + + /* Init the stub hash table too. */ + if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc)) + return NULL; + + /* And the branch hash table. */ + if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc)) + return NULL; + + /* Initializing two fields of the union is just cosmetic. We really + only care about glist, but when compiled on a 32-bit host the + bfd_vma fields are larger. Setting the bfd_vma to zero makes + debugger inspection of these fields look nicer. */ + htab->elf.init_refcount.refcount = 0; + htab->elf.init_refcount.glist = NULL; + htab->elf.init_offset.offset = 0; + htab->elf.init_offset.glist = NULL; + + return &htab->elf.root; +} + +/* Free the derived linker hash table. */ + +static void +ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash) +{ + struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash; + + bfd_hash_table_free (&ret->stub_hash_table); + bfd_hash_table_free (&ret->branch_hash_table); + _bfd_generic_link_hash_table_free (hash); +} + +/* Satisfy the ELF linker by filling in some fields in our fake bfd. */ + +void +ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + + elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64; + +/* Always hook our dynamic sections into the first bfd, which is the + linker created stub bfd. This ensures that the GOT header is at + the start of the output TOC section. */ + htab = ppc_hash_table (info); + htab->stub_bfd = abfd; + htab->elf.dynobj = abfd; +} + +/* Build a name for an entry in the stub hash table. */ + +static char * +ppc_stub_name (const asection *input_section, + const asection *sym_sec, + const struct ppc_link_hash_entry *h, + const Elf_Internal_Rela *rel) +{ + char *stub_name; + bfd_size_type len; + + /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 + offsets from a sym as a branch target? In fact, we could + probably assume the addend is always zero. */ + BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); + + if (h) + { + len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; + stub_name = bfd_malloc (len); + if (stub_name != NULL) + { + sprintf (stub_name, "%08x.%s+%x", + input_section->id & 0xffffffff, + h->elf.root.root.string, + (int) rel->r_addend & 0xffffffff); + } + } + else + { + len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; + stub_name = bfd_malloc (len); + if (stub_name != NULL) + { + sprintf (stub_name, "%08x.%x:%x+%x", + input_section->id & 0xffffffff, + sym_sec->id & 0xffffffff, + (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, + (int) rel->r_addend & 0xffffffff); + } + } + return stub_name; +} + +/* Look up an entry in the stub hash. Stub entries are cached because + creating the stub name takes a bit of time. */ + +static struct ppc_stub_hash_entry * +ppc_get_stub_entry (const asection *input_section, + const asection *sym_sec, + struct elf_link_hash_entry *hash, + const Elf_Internal_Rela *rel, + struct ppc_link_hash_table *htab) +{ + struct ppc_stub_hash_entry *stub_entry; + struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash; + const asection *id_sec; + + /* If this input section is part of a group of sections sharing one + stub section, then use the id of the first section in the group. + Stub names need to include a section id, as there may well be + more than one stub used to reach say, printf, and we need to + distinguish between them. */ + id_sec = htab->stub_group[input_section->id].link_sec; + + if (h != NULL && h->stub_cache != NULL + && h->stub_cache->h == h + && h->stub_cache->id_sec == id_sec) + { + stub_entry = h->stub_cache; + } + else + { + char *stub_name; + + stub_name = ppc_stub_name (id_sec, sym_sec, h, rel); + if (stub_name == NULL) + return NULL; + + stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, + stub_name, FALSE, FALSE); + if (h != NULL) + h->stub_cache = stub_entry; + + free (stub_name); + } + + return stub_entry; +} + +/* Add a new stub entry to the stub hash. Not all fields of the new + stub entry are initialised. */ + +static struct ppc_stub_hash_entry * +ppc_add_stub (const char *stub_name, + asection *section, + struct ppc_link_hash_table *htab) +{ + asection *link_sec; + asection *stub_sec; + struct ppc_stub_hash_entry *stub_entry; + + link_sec = htab->stub_group[section->id].link_sec; + stub_sec = htab->stub_group[section->id].stub_sec; + if (stub_sec == NULL) + { + stub_sec = htab->stub_group[link_sec->id].stub_sec; + if (stub_sec == NULL) + { + size_t namelen; + bfd_size_type len; + char *s_name; + + namelen = strlen (link_sec->name); + len = namelen + sizeof (STUB_SUFFIX); + s_name = bfd_alloc (htab->stub_bfd, len); + if (s_name == NULL) + return NULL; + + memcpy (s_name, link_sec->name, namelen); + memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); + stub_sec = (*htab->add_stub_section) (s_name, link_sec); + if (stub_sec == NULL) + return NULL; + htab->stub_group[link_sec->id].stub_sec = stub_sec; + } + htab->stub_group[section->id].stub_sec = stub_sec; + } + + /* Enter this entry into the linker stub hash table. */ + stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, + TRUE, FALSE); + if (stub_entry == NULL) + { + (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), + bfd_archive_filename (section->owner), + stub_name); + return NULL; + } + + stub_entry->stub_sec = stub_sec; + stub_entry->stub_offset = 0; + stub_entry->id_sec = link_sec; + return stub_entry; +} + +/* Create sections for linker generated code. */ + +static bfd_boolean +create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + flagword flags; + + htab = ppc_hash_table (info); + + /* Create .sfpr for code to save and restore fp regs. */ + flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr"); + if (htab->sfpr == NULL + || ! bfd_set_section_flags (dynobj, htab->sfpr, flags) + || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) + return FALSE; + + /* Create .glink for lazy dynamic linking support. */ + htab->glink = bfd_make_section_anyway (dynobj, ".glink"); + if (htab->glink == NULL + || ! bfd_set_section_flags (dynobj, htab->glink, flags) + || ! bfd_set_section_alignment (dynobj, htab->glink, 2)) + return FALSE; + + /* Create .branch_lt for plt_branch stubs. */ + flags = (SEC_ALLOC | SEC_LOAD + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt"); + if (htab->brlt == NULL + || ! bfd_set_section_flags (dynobj, htab->brlt, flags) + || ! bfd_set_section_alignment (dynobj, htab->brlt, 3)) + return FALSE; + + if (info->shared) + { + flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt"); + if (!htab->relbrlt + || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags) + || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3)) + return FALSE; + } + return TRUE; +} + +/* Create .got and .rela.got sections in ABFD, and .got in dynobj if + not already done. */ + +static bfd_boolean +create_got_section (bfd *abfd, struct bfd_link_info *info) +{ + asection *got, *relgot; + flagword flags; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (!htab->got) + { + if (! _bfd_elf_create_got_section (htab->elf.dynobj, info)) + return FALSE; + + htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got"); + if (!htab->got) + abort (); + } + + flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_LINKER_CREATED); + + got = bfd_make_section (abfd, ".got"); + if (!got + || !bfd_set_section_flags (abfd, got, flags) + || !bfd_set_section_alignment (abfd, got, 3)) + return FALSE; + + relgot = bfd_make_section (abfd, ".rela.got"); + if (!relgot + || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY) + || ! bfd_set_section_alignment (abfd, relgot, 3)) + return FALSE; + + ppc64_elf_tdata (abfd)->got = got; + ppc64_elf_tdata (abfd)->relgot = relgot; + return TRUE; +} + +/* Create the dynamic sections, and set up shortcuts. */ + +static bfd_boolean +ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + + if (!_bfd_elf_create_dynamic_sections (dynobj, info)) + return FALSE; + + htab = ppc_hash_table (info); + if (!htab->got) + htab->got = bfd_get_section_by_name (dynobj, ".got"); + htab->plt = bfd_get_section_by_name (dynobj, ".plt"); + htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt"); + htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss"); + if (!info->shared) + htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss"); + + if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss + || (!info->shared && !htab->relbss)) + abort (); + + return TRUE; +} + +/* Copy the extra info we tack onto an elf_link_hash_entry. */ + +static void +ppc64_elf_copy_indirect_symbol + (const struct elf_backend_data *bed ATTRIBUTE_UNUSED, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct ppc_link_hash_entry *edir, *eind; + flagword mask; + + edir = (struct ppc_link_hash_entry *) dir; + eind = (struct ppc_link_hash_entry *) ind; + + /* Copy over any dynamic relocs we may have on the indirect sym. */ + if (eind->dyn_relocs != NULL) + { + if (edir->dyn_relocs != NULL) + { + struct ppc_dyn_relocs **pp; + struct ppc_dyn_relocs *p; + + if (eind->elf.root.type == bfd_link_hash_indirect) + abort (); + + /* Add reloc counts against the weak sym to the strong sym + list. Merge any entries against the same section. */ + for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) + { + struct ppc_dyn_relocs *q; + + for (q = edir->dyn_relocs; q != NULL; q = q->next) + if (q->sec == p->sec) + { + q->pc_count += p->pc_count; + q->count += p->count; + *pp = p->next; + break; + } + if (q == NULL) + pp = &p->next; + } + *pp = edir->dyn_relocs; + } + + edir->dyn_relocs = eind->dyn_relocs; + eind->dyn_relocs = NULL; + } + + edir->is_func |= eind->is_func; + edir->is_func_descriptor |= eind->is_func_descriptor; + edir->is_entry |= eind->is_entry; + edir->tls_mask |= eind->tls_mask; + + mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF + | ELF_LINK_HASH_NEEDS_PLT); + /* If called to transfer flags for a weakdef during processing + of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. + We clear it ourselves for ELIMINATE_COPY_RELOCS. */ + if (ELIMINATE_COPY_RELOCS + && eind->elf.root.type != bfd_link_hash_indirect + && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) + mask &= ~ELF_LINK_NON_GOT_REF; + + edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask; + + /* If we were called to copy over info for a weak sym, that's all. */ + if (eind->elf.root.type != bfd_link_hash_indirect) + return; + + /* Copy over got entries that we may have already seen to the + symbol which just became indirect. */ + if (eind->elf.got.glist != NULL) + { + if (edir->elf.got.glist != NULL) + { + struct got_entry **entp; + struct got_entry *ent; + + for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) + { + struct got_entry *dent; + + for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) + if (dent->addend == ent->addend + && dent->owner == ent->owner + && dent->tls_type == ent->tls_type) + { + dent->got.refcount += ent->got.refcount; + *entp = ent->next; + break; + } + if (dent == NULL) + entp = &ent->next; + } + *entp = edir->elf.got.glist; + } + + edir->elf.got.glist = eind->elf.got.glist; + eind->elf.got.glist = NULL; + } + + /* And plt entries. */ + if (eind->elf.plt.plist != NULL) + { + if (edir->elf.plt.plist != NULL) + { + struct plt_entry **entp; + struct plt_entry *ent; + + for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) + { + struct plt_entry *dent; + + for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) + if (dent->addend == ent->addend) + { + dent->plt.refcount += ent->plt.refcount; + *entp = ent->next; + break; + } + if (dent == NULL) + entp = &ent->next; + } + *entp = edir->elf.plt.plist; + } + + edir->elf.plt.plist = eind->elf.plt.plist; + eind->elf.plt.plist = NULL; + } + + if (edir->elf.dynindx == -1) + { + edir->elf.dynindx = eind->elf.dynindx; + edir->elf.dynstr_index = eind->elf.dynstr_index; + eind->elf.dynindx = -1; + eind->elf.dynstr_index = 0; + } + else + BFD_ASSERT (eind->elf.dynindx == -1); +} + +/* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and + symbols undefined on the command-line. */ + +bfd_boolean +ppc64_elf_mark_entry_syms (struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + struct bfd_sym_chain *sym; + + htab = ppc_hash_table (info); + for (sym = info->gc_sym_list; sym; sym = sym->next) + { + struct elf_link_hash_entry *h; + + h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE); + if (h != NULL) + ((struct ppc_link_hash_entry *) h)->is_entry = 1; + } + return TRUE; +} + +/* Hack symbols defined in .opd sections to be function type. */ + +static bfd_boolean +ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + Elf_Internal_Sym *isym, + const char **name ATTRIBUTE_UNUSED, + flagword *flags ATTRIBUTE_UNUSED, + asection **sec, + bfd_vma *value ATTRIBUTE_UNUSED) +{ + if (strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0) + isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); + return TRUE; +} + +static bfd_boolean +update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, + unsigned long r_symndx, bfd_vma r_addend, int tls_type) +{ + struct got_entry **local_got_ents = elf_local_got_ents (abfd); + char *local_got_tls_masks; + + if (local_got_ents == NULL) + { + bfd_size_type size = symtab_hdr->sh_info; + + size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks); + local_got_ents = bfd_zalloc (abfd, size); + if (local_got_ents == NULL) + return FALSE; + elf_local_got_ents (abfd) = local_got_ents; + } + + if ((tls_type & TLS_EXPLICIT) == 0) + { + struct got_entry *ent; + + for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) + if (ent->addend == r_addend + && ent->owner == abfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + { + bfd_size_type amt = sizeof (*ent); + ent = bfd_alloc (abfd, amt); + if (ent == NULL) + return FALSE; + ent->next = local_got_ents[r_symndx]; + ent->addend = r_addend; + ent->owner = abfd; + ent->tls_type = tls_type; + ent->got.refcount = 0; + local_got_ents[r_symndx] = ent; + } + ent->got.refcount += 1; + } + + local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info); + local_got_tls_masks[r_symndx] |= tls_type; + return TRUE; +} + +static bfd_boolean +update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend) +{ + struct plt_entry *ent; + + for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == addend) + break; + if (ent == NULL) + { + bfd_size_type amt = sizeof (*ent); + ent = bfd_alloc (abfd, amt); + if (ent == NULL) + return FALSE; + ent->next = eh->elf.plt.plist; + ent->addend = addend; + ent->plt.refcount = 0; + eh->elf.plt.plist = ent; + } + ent->plt.refcount += 1; + eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + eh->is_func = 1; + return TRUE; +} + +/* Find the function descriptor hash entry from the given function code + hash entry FH. Link the entries via their OH fields. */ +static struct ppc_link_hash_entry * +get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) +{ + struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh; + + if (fdh == NULL) + { + const char *fd_name = fh->elf.root.root.string + 1; + + fdh = (struct ppc_link_hash_entry *) + elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE); + if (fdh != NULL) + { + fdh->is_func_descriptor = 1; + fdh->oh = &fh->elf; + fh->is_func = 1; + fh->oh = &fdh->elf; + } + } + + return fdh; +} + +/* Look through the relocs for a section during the first phase, and + calculate needed space in the global offset table, procedure + linkage table, and dynamic reloc sections. */ + +static bfd_boolean +ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + struct ppc_link_hash_table *htab; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + asection *sreloc; + asection **opd_sym_map; + + if (info->relocatable) + return TRUE; + + /* Don't do anything special with non-loaded, non-alloced sections. + In particular, any relocs in such sections should not affect GOT + and PLT reference counting (ie. we don't allow them to create GOT + or PLT entries), there's no possibility or desire to optimize TLS + relocs, and there's not much point in propagating relocs to shared + libs that the dynamic linker won't relocate. */ + if ((sec->flags & SEC_ALLOC) == 0) + return TRUE; + + htab = ppc_hash_table (info); + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + + sym_hashes = elf_sym_hashes (abfd); + sym_hashes_end = (sym_hashes + + symtab_hdr->sh_size / sizeof (Elf64_External_Sym) + - symtab_hdr->sh_info); + + sreloc = NULL; + opd_sym_map = NULL; + if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0) + { + /* Garbage collection needs some extra help with .opd sections. + We don't want to necessarily keep everything referenced by + relocs in .opd, as that would keep all functions. Instead, + if we reference an .opd symbol (a function descriptor), we + want to keep the function code symbol's section. This is + easy for global symbols, but for local syms we need to keep + information about the associated function section. Later, if + edit_opd deletes entries, we'll use this array to adjust + local syms in .opd. */ + union opd_info { + asection *func_section; + long entry_adjust; + }; + bfd_size_type amt; + + amt = sec->_raw_size * sizeof (union opd_info) / 24; + opd_sym_map = bfd_zalloc (abfd, amt); + if (opd_sym_map == NULL) + return FALSE; + ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map; + } + + if (htab->sfpr == NULL + && !create_linkage_sections (htab->elf.dynobj, info)) + return FALSE; + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + unsigned long r_symndx; + struct elf_link_hash_entry *h; + enum elf_ppc64_reloc_type r_type; + int tls_type = 0; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + ppc64_tlsld_got (abfd)->refcount += 1; + tls_type = TLS_TLS | TLS_LD; + goto dogottls; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_type = TLS_TLS | TLS_GD; + goto dogottls; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + if (info->shared) + info->flags |= DF_STATIC_TLS; + tls_type = TLS_TLS | TLS_TPREL; + goto dogottls; + + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_HI: + case R_PPC64_GOT_DTPREL16_HA: + tls_type = TLS_TLS | TLS_DTPREL; + dogottls: + sec->has_tls_reloc = 1; + /* Fall thru */ + + case R_PPC64_GOT16: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_HA: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_LO_DS: + /* This symbol requires a global offset table entry. */ + sec->has_gp_reloc = 1; + if (ppc64_elf_tdata (abfd)->got == NULL + && !create_got_section (abfd, info)) + return FALSE; + + if (h != NULL) + { + struct ppc_link_hash_entry *eh; + struct got_entry *ent; + + eh = (struct ppc_link_hash_entry *) h; + for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->owner == abfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + { + bfd_size_type amt = sizeof (*ent); + ent = bfd_alloc (abfd, amt); + if (ent == NULL) + return FALSE; + ent->next = eh->elf.got.glist; + ent->addend = rel->r_addend; + ent->owner = abfd; + ent->tls_type = tls_type; + ent->got.refcount = 0; + eh->elf.got.glist = ent; + } + ent->got.refcount += 1; + eh->tls_mask |= tls_type; + } + else + /* This is a global offset table entry for a local symbol. */ + if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, + rel->r_addend, tls_type)) + return FALSE; + break; + + case R_PPC64_PLT16_HA: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT32: + case R_PPC64_PLT64: + /* This symbol requires a procedure linkage table entry. We + actually build the entry in adjust_dynamic_symbol, + because this might be a case of linking PIC code without + linking in any dynamic objects, in which case we don't + need to generate a procedure linkage table after all. */ + if (h == NULL) + { + /* It does not make sense to have a procedure linkage + table entry for a local symbol. */ + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + else + if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, + rel->r_addend)) + return FALSE; + break; + + /* The following relocations don't need to propagate the + relocation if linking a shared object since they are + section relative. */ + case R_PPC64_SECTOFF: + case R_PPC64_SECTOFF_LO: + case R_PPC64_SECTOFF_HI: + case R_PPC64_SECTOFF_HA: + case R_PPC64_SECTOFF_DS: + case R_PPC64_SECTOFF_LO_DS: + case R_PPC64_DTPREL16: + case R_PPC64_DTPREL16_LO: + case R_PPC64_DTPREL16_HI: + case R_PPC64_DTPREL16_HA: + case R_PPC64_DTPREL16_DS: + case R_PPC64_DTPREL16_LO_DS: + case R_PPC64_DTPREL16_HIGHER: + case R_PPC64_DTPREL16_HIGHERA: + case R_PPC64_DTPREL16_HIGHEST: + case R_PPC64_DTPREL16_HIGHESTA: + break; + + /* Nor do these. */ + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_HA: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + sec->has_gp_reloc = 1; + break; + + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_PPC64_GNU_VTINHERIT: + if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return FALSE; + break; + + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_PPC64_GNU_VTENTRY: + if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + + case R_PPC64_REL14: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL14_BRNTAKEN: + htab->has_14bit_branch = 1; + /* Fall through. */ + + case R_PPC64_REL24: + if (h != NULL + && h->root.root.string[0] == '.' + && h->root.root.string[1] != 0) + { + /* We may need a .plt entry if the function this reloc + refers to is in a shared lib. */ + if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, + rel->r_addend)) + return FALSE; + if (h == htab->tls_get_addr) + sec->has_tls_reloc = 1; + else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15) + == 0) + && (h->root.root.string[15] == 0 + || h->root.root.string[15] == '@')) + { + htab->tls_get_addr = h; + sec->has_tls_reloc = 1; + } + } + break; + + case R_PPC64_TPREL64: + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; + if (info->shared) + info->flags |= DF_STATIC_TLS; + goto dotlstoc; + + case R_PPC64_DTPMOD64: + if (rel + 1 < rel_end + && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) + && rel[1].r_offset == rel->r_offset + 8) + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; + else + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; + goto dotlstoc; + + case R_PPC64_DTPREL64: + tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; + if (rel != relocs + && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) + && rel[-1].r_offset == rel->r_offset - 8) + /* This is the second reloc of a dtpmod, dtprel pair. + Don't mark with TLS_DTPREL. */ + goto dodyn; + + dotlstoc: + sec->has_tls_reloc = 1; + if (h != NULL) + { + struct ppc_link_hash_entry *eh; + eh = (struct ppc_link_hash_entry *) h; + eh->tls_mask |= tls_type; + } + else + if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, + rel->r_addend, tls_type)) + return FALSE; + + if (ppc64_elf_section_data (sec)->t_symndx == NULL) + { + /* One extra to simplify get_tls_mask. */ + bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1; + ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt); + if (ppc64_elf_section_data (sec)->t_symndx == NULL) + return FALSE; + } + BFD_ASSERT (rel->r_offset % 8 == 0); + ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx; + + /* Mark the second slot of a GD or LD entry. + -1 to indicate GD and -2 to indicate LD. */ + if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) + ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1; + else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) + ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2; + goto dodyn; + + case R_PPC64_TPREL16: + case R_PPC64_TPREL16_LO: + case R_PPC64_TPREL16_HI: + case R_PPC64_TPREL16_HA: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + if (info->shared) + { + info->flags |= DF_STATIC_TLS; + goto dodyn; + } + break; + + case R_PPC64_ADDR64: + if (opd_sym_map != NULL + && h != NULL + && h->root.root.string[0] == '.' + && h->root.root.string[1] != 0) + get_fdh ((struct ppc_link_hash_entry *) h, htab); + + if (opd_sym_map != NULL + && h == NULL + && rel + 1 < rel_end + && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) + { + asection *s; + + s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, + r_symndx); + if (s == NULL) + return FALSE; + else if (s != sec) + opd_sym_map[rel->r_offset / 24] = s; + } + /* Fall through. */ + + case R_PPC64_REL30: + case R_PPC64_REL32: + case R_PPC64_REL64: + case R_PPC64_ADDR14: + case R_PPC64_ADDR14_BRNTAKEN: + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_ADDR16: + case R_PPC64_ADDR16_DS: + case R_PPC64_ADDR16_HA: + case R_PPC64_ADDR16_HI: + case R_PPC64_ADDR16_HIGHER: + case R_PPC64_ADDR16_HIGHERA: + case R_PPC64_ADDR16_HIGHEST: + case R_PPC64_ADDR16_HIGHESTA: + case R_PPC64_ADDR16_LO: + case R_PPC64_ADDR16_LO_DS: + case R_PPC64_ADDR24: + case R_PPC64_ADDR32: + case R_PPC64_UADDR16: + case R_PPC64_UADDR32: + case R_PPC64_UADDR64: + case R_PPC64_TOC: + if (h != NULL && !info->shared) + /* We may need a copy reloc. */ + h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; + + /* Don't propagate .opd relocs. */ + if (NO_OPD_RELOCS && opd_sym_map != NULL) + break; + + /* If we are creating a shared library, and this is a reloc + against a global symbol, or a non PC relative reloc + against a local symbol, then we need to copy the reloc + into the shared library. However, if we are linking with + -Bsymbolic, we do not need to copy a reloc against a + global symbol which is defined in an object we are + including in the link (i.e., DEF_REGULAR is set). At + this point we have not seen all the input files, so it is + possible that DEF_REGULAR is not set now but will be set + later (it is never cleared). In case of a weak definition, + DEF_REGULAR may be cleared later by a strong definition in + a shared library. We account for that possibility below by + storing information in the dyn_relocs field of the hash + table entry. A similar situation occurs when creating + shared libraries and symbol visibility changes render the + symbol local. + + If on the other hand, we are creating an executable, we + may need to keep relocations for symbols satisfied by a + dynamic library if we manage to avoid copy relocs for the + symbol. */ + dodyn: + if ((info->shared + && (MUST_BE_DYN_RELOC (r_type) + || (h != NULL + && (! info->symbolic + || h->root.type == bfd_link_hash_defweak + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)))) + || (ELIMINATE_COPY_RELOCS + && !info->shared + && h != NULL + && (h->root.type == bfd_link_hash_defweak + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0))) + { + struct ppc_dyn_relocs *p; + struct ppc_dyn_relocs **head; + + /* We must copy these reloc types into the output file. + Create a reloc section in dynobj and make room for + this reloc. */ + if (sreloc == NULL) + { + const char *name; + bfd *dynobj; + + name = (bfd_elf_string_from_elf_section + (abfd, + elf_elfheader (abfd)->e_shstrndx, + elf_section_data (sec)->rel_hdr.sh_name)); + if (name == NULL) + return FALSE; + + if (strncmp (name, ".rela", 5) != 0 + || strcmp (bfd_get_section_name (abfd, sec), + name + 5) != 0) + { + (*_bfd_error_handler) + (_("%s: bad relocation section name `%s\'"), + bfd_archive_filename (abfd), name); + bfd_set_error (bfd_error_bad_value); + } + + dynobj = htab->elf.dynobj; + sreloc = bfd_get_section_by_name (dynobj, name); + if (sreloc == NULL) + { + flagword flags; + + sreloc = bfd_make_section (dynobj, name); + flags = (SEC_HAS_CONTENTS | SEC_READONLY + | SEC_IN_MEMORY | SEC_LINKER_CREATED); + if ((sec->flags & SEC_ALLOC) != 0) + flags |= SEC_ALLOC | SEC_LOAD; + if (sreloc == NULL + || ! bfd_set_section_flags (dynobj, sreloc, flags) + || ! bfd_set_section_alignment (dynobj, sreloc, 3)) + return FALSE; + } + elf_section_data (sec)->sreloc = sreloc; + } + + /* If this is a global symbol, we count the number of + relocations we need for this symbol. */ + if (h != NULL) + { + head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; + } + else + { + /* Track dynamic relocs needed for local syms too. + We really need local syms available to do this + easily. Oh well. */ + + asection *s; + s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, + sec, r_symndx); + if (s == NULL) + return FALSE; + + head = ((struct ppc_dyn_relocs **) + &elf_section_data (s)->local_dynrel); + } + + p = *head; + if (p == NULL || p->sec != sec) + { + p = bfd_alloc (htab->elf.dynobj, sizeof *p); + if (p == NULL) + return FALSE; + p->next = *head; + *head = p; + p->sec = sec; + p->count = 0; + p->pc_count = 0; + } + + p->count += 1; + if (!MUST_BE_DYN_RELOC (r_type)) + p->pc_count += 1; + } + break; + + default: + break; + } + } + + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +ppc64_elf_gc_mark_hook (asection *sec, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + asection *rsec = NULL; + + if (h != NULL) + { + enum elf_ppc64_reloc_type r_type; + struct ppc_link_hash_entry *fdh; + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + case R_PPC64_GNU_VTINHERIT: + case R_PPC64_GNU_VTENTRY: + break; + + default: + switch (h->root.type) + { + case bfd_link_hash_defined: + case bfd_link_hash_defweak: + fdh = (struct ppc_link_hash_entry *) h; + + /* Function descriptor syms cause the associated + function code sym section to be marked. */ + if (fdh->is_func_descriptor) + rsec = fdh->oh->root.u.def.section; + + /* Function entry syms return NULL if they are in .opd + and are not ._start (or others undefined on the ld + command line). Thus we avoid marking all function + sections, as all functions are referenced in .opd. */ + else if ((fdh->oh != NULL + && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry) + || ppc64_elf_section_data (sec)->opd.func_sec == NULL) + rsec = h->root.u.def.section; + break; + + case bfd_link_hash_common: + rsec = h->root.u.c.p->section; + break; + + default: + break; + } + } + } + else + { + asection **opd_sym_section; + + rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); + opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec; + if (opd_sym_section != NULL) + rsec = opd_sym_section[sym->st_value / 24]; + else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL) + rsec = NULL; + } + + return rsec; +} + +/* Update the .got, .plt. and dynamic reloc reference counts for the + section being removed. */ + +static bfd_boolean +ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + struct ppc_link_hash_table *htab; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + struct got_entry **local_got_ents; + const Elf_Internal_Rela *rel, *relend; + + if ((sec->flags & SEC_ALLOC) == 0) + return TRUE; + + elf_section_data (sec)->local_dynrel = NULL; + + htab = ppc_hash_table (info); + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_ents = elf_local_got_ents (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + enum elf_ppc64_reloc_type r_type; + struct elf_link_hash_entry *h = NULL; + char tls_type = 0; + + r_symndx = ELF64_R_SYM (rel->r_info); + r_type = ELF64_R_TYPE (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + struct ppc_link_hash_entry *eh; + struct ppc_dyn_relocs **pp; + struct ppc_dyn_relocs *p; + + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + eh = (struct ppc_link_hash_entry *) h; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) + if (p->sec == sec) + { + /* Everything must go for SEC. */ + *pp = p->next; + break; + } + } + + switch (r_type) + { + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + ppc64_tlsld_got (abfd)->refcount -= 1; + tls_type = TLS_TLS | TLS_LD; + goto dogot; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_type = TLS_TLS | TLS_GD; + goto dogot; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + tls_type = TLS_TLS | TLS_TPREL; + goto dogot; + + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_HI: + case R_PPC64_GOT_DTPREL16_HA: + tls_type = TLS_TLS | TLS_DTPREL; + goto dogot; + + case R_PPC64_GOT16: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_HA: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_LO_DS: + dogot: + { + struct got_entry *ent; + + if (h != NULL) + ent = h->got.glist; + else + ent = local_got_ents[r_symndx]; + + for (; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->owner == abfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + abort (); + if (ent->got.refcount > 0) + ent->got.refcount -= 1; + } + break; + + case R_PPC64_PLT16_HA: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT32: + case R_PPC64_PLT64: + case R_PPC64_REL14: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL24: + if (h != NULL) + { + struct plt_entry *ent; + + for (ent = h->plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend) + break; + if (ent == NULL) + abort (); + if (ent->plt.refcount > 0) + ent->plt.refcount -= 1; + } + break; + + default: + break; + } + } + return TRUE; +} + +/* Called via elf_link_hash_traverse to transfer dynamic linking + information on function code symbol entries to their corresponding + function descriptor symbol entries. */ +static bfd_boolean +func_desc_adjust (struct elf_link_hash_entry *h, void *inf) +{ + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + struct plt_entry *ent; + struct ppc_link_hash_entry *fh; + struct ppc_link_hash_entry *fdh; + bfd_boolean force_local; + + fh = (struct ppc_link_hash_entry *) h; + if (fh->elf.root.type == bfd_link_hash_indirect) + return TRUE; + + if (fh->elf.root.type == bfd_link_hash_warning) + fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link; + + info = inf; + htab = ppc_hash_table (info); + + /* If this is a function code symbol, transfer dynamic linking + information to the function descriptor symbol. */ + if (!fh->is_func) + return TRUE; + + if (fh->elf.root.type == bfd_link_hash_undefweak + && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR)) + htab->have_undefweak = TRUE; + + for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) + if (ent->plt.refcount > 0) + break; + if (ent == NULL + || fh->elf.root.root.string[0] != '.' + || fh->elf.root.root.string[1] == '\0') + return TRUE; + + /* Find the corresponding function descriptor symbol. Create it + as undefined if necessary. */ + + fdh = get_fdh (fh, htab); + if (fdh != NULL) + while (fdh->elf.root.type == bfd_link_hash_indirect + || fdh->elf.root.type == bfd_link_hash_warning) + fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link; + + if (fdh == NULL + && info->shared + && (fh->elf.root.type == bfd_link_hash_undefined + || fh->elf.root.type == bfd_link_hash_undefweak)) + { + bfd *abfd; + asymbol *newsym; + struct bfd_link_hash_entry *bh; + + abfd = fh->elf.root.u.undef.abfd; + newsym = bfd_make_empty_symbol (abfd); + newsym->name = fh->elf.root.root.string + 1; + newsym->section = bfd_und_section_ptr; + newsym->value = 0; + newsym->flags = BSF_OBJECT; + if (fh->elf.root.type == bfd_link_hash_undefweak) + newsym->flags |= BSF_WEAK; + + bh = &fdh->elf.root; + if ( !(_bfd_generic_link_add_one_symbol + (info, abfd, newsym->name, newsym->flags, + newsym->section, newsym->value, NULL, FALSE, FALSE, &bh))) + { + return FALSE; + } + fdh = (struct ppc_link_hash_entry *) bh; + fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF; + fdh->elf.size = 24; + fdh->elf.type = STT_OBJECT; + } + + if (fdh != NULL + && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 + && (info->shared + || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 + || (fdh->elf.root.type == bfd_link_hash_undefweak + && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT))) + { + if (fdh->elf.dynindx == -1) + if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) + return FALSE; + fdh->elf.elf_link_hash_flags + |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_REF_DYNAMIC + | ELF_LINK_HASH_REF_REGULAR_NONWEAK + | ELF_LINK_NON_GOT_REF)); + if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT) + { + fdh->elf.plt.plist = fh->elf.plt.plist; + fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + } + fdh->is_func_descriptor = 1; + fdh->oh = &fh->elf; + fh->oh = &fdh->elf; + } + + /* Now that the info is on the function descriptor, clear the + function code sym info. Any function code syms for which we + don't have a definition in a regular file, we force local. + This prevents a shared library from exporting syms that have + been imported from another library. Function code syms that + are really in the library we must leave global to prevent the + linker dragging in a definition from a static library. */ + force_local + = (info->shared + && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 + || fdh == NULL + || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 + || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)); + _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); + + return TRUE; +} + +#define MIN_SAVE_FPR 14 +#define MAX_SAVE_FPR 31 + +/* Called near the start of bfd_elf_size_dynamic_sections. We use + this hook to a) provide some gcc support functions, and b) transfer + dynamic linking information gathered so far on function code symbol + entries, to their corresponding function descriptor symbol entries. */ +static bfd_boolean +ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + unsigned int lowest_savef = MAX_SAVE_FPR + 2; + unsigned int lowest_restf = MAX_SAVE_FPR + 2; + unsigned int i; + struct elf_link_hash_entry *h; + bfd_byte *p; + char sym[10]; + + htab = ppc_hash_table (info); + + if (htab->sfpr == NULL) + /* We don't have any relocs. */ + return TRUE; + + /* First provide any missing ._savef* and ._restf* functions. */ + memcpy (sym, "._savef14", 10); + for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) + { + sym[7] = i / 10 + '0'; + sym[8] = i % 10 + '0'; + h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); + if (h != NULL + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + if (lowest_savef > i) + lowest_savef = i; + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = htab->sfpr; + h->root.u.def.value = (i - lowest_savef) * 4; + h->type = STT_FUNC; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + _bfd_elf_link_hash_hide_symbol (info, h, TRUE); + } + } + + memcpy (sym, "._restf14", 10); + for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) + { + sym[7] = i / 10 + '0'; + sym[8] = i % 10 + '0'; + h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); + if (h != NULL + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + if (lowest_restf > i) + lowest_restf = i; + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = htab->sfpr; + h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 + + (i - lowest_restf) * 4); + h->type = STT_FUNC; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + _bfd_elf_link_hash_hide_symbol (info, h, TRUE); + } + } + + elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); + + htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 + + (MAX_SAVE_FPR + 2 - lowest_restf) * 4); + + if (htab->sfpr->_raw_size == 0) + { + if (!htab->have_undefweak) + { + _bfd_strip_section_from_output (info, htab->sfpr); + return TRUE; + } + + htab->sfpr->_raw_size = 4; + } + + p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size); + if (p == NULL) + return FALSE; + htab->sfpr->contents = p; + + for (i = lowest_savef; i <= MAX_SAVE_FPR; i++) + { + unsigned int fpr = i << 21; + unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; + bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p); + p += 4; + } + if (lowest_savef <= MAX_SAVE_FPR) + { + bfd_put_32 (htab->elf.dynobj, BLR, p); + p += 4; + } + + for (i = lowest_restf; i <= MAX_SAVE_FPR; i++) + { + unsigned int fpr = i << 21; + unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; + bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p); + p += 4; + } + if (lowest_restf <= MAX_SAVE_FPR + || htab->sfpr->_raw_size == 4) + { + bfd_put_32 (htab->elf.dynobj, BLR, p); + } + + return TRUE; +} + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static bfd_boolean +ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) +{ + struct ppc_link_hash_table *htab; + asection *s; + unsigned int power_of_two; + + htab = ppc_hash_table (info); + + /* Deal with function syms. */ + if (h->type == STT_FUNC + || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) + { + /* Clear procedure linkage table information for any symbol that + won't need a .plt entry. */ + struct plt_entry *ent; + for (ent = h->plt.plist; ent != NULL; ent = ent->next) + if (ent->plt.refcount > 0) + break; + if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor + || ent == NULL + || SYMBOL_CALLS_LOCAL (info, h) + || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak)) + { + h->plt.plist = NULL; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + } + else + h->plt.plist = NULL; + + /* If this is a weak symbol, and there is a real definition, the + processor independent code will have arranged for us to see the + real definition first, and we can just use the same value. */ + if (h->weakdef != NULL) + { + BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined + || h->weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->weakdef->root.u.def.section; + h->root.u.def.value = h->weakdef->root.u.def.value; + if (ELIMINATE_COPY_RELOCS) + h->elf_link_hash_flags + = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) + | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); + return TRUE; + } + + /* If we are creating a shared library, we must presume that the + only references to the symbol are via the global offset table. + For such cases we need not do anything here; the relocations will + be handled correctly by relocate_section. */ + if (info->shared) + return TRUE; + + /* If there are no references to this symbol that do not use the + GOT, we don't need to generate a copy reloc. */ + if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) + return TRUE; + + if (ELIMINATE_COPY_RELOCS) + { + struct ppc_link_hash_entry * eh; + struct ppc_dyn_relocs *p; + + eh = (struct ppc_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + s = p->sec->output_section; + if (s != NULL && (s->flags & SEC_READONLY) != 0) + break; + } + + /* If we didn't find any dynamic relocs in read-only sections, then + we'll be keeping the dynamic relocs and avoiding the copy reloc. */ + if (p == NULL) + { + h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; + return TRUE; + } + } + + if (h->plt.plist != NULL) + { + /* We should never get here, but unfortunately there are versions + of gcc out there that improperly (for this ABI) put initialized + function pointers, vtable refs and suchlike in read-only + sections. Allow them to proceed, but warn that this might + break at runtime. */ + (*_bfd_error_handler) + (_("copy reloc against `%s' requires lazy plt linking; " + "avoid setting LD_BIND_NOW=1 or upgrade gcc"), + h->root.root.string); + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. */ + + /* We must allocate the symbol in our .dynbss section, which will + become part of the .bss section of the executable. There will be + an entry for this symbol in the .dynsym section. The dynamic + object will contain position independent code, so all references + from the dynamic object to this symbol will go through the global + offset table. The dynamic linker will use the .dynsym entry to + determine the address it must put in the global offset table, so + both the dynamic object and the regular object will refer to the + same memory location for the variable. */ + + /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker + to copy the initial value out of the dynamic object and into the + runtime process image. We need to remember the offset into the + .rela.bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) + { + htab->relbss->_raw_size += sizeof (Elf64_External_Rela); + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; + } + + /* We need to figure out the alignment required for this symbol. I + have no idea how ELF linkers handle this. */ + power_of_two = bfd_log2 (h->size); + if (power_of_two > 4) + power_of_two = 4; + + /* Apply the required alignment. */ + s = htab->dynbss; + s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); + if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) + { + if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) + return FALSE; + } + + /* Define the symbol as being at this point in the section. */ + h->root.u.def.section = s; + h->root.u.def.value = s->_raw_size; + + /* Increment the section size to make room for the symbol. */ + s->_raw_size += h->size; + + return TRUE; +} + +/* If given a function descriptor symbol, hide both the function code + sym and the descriptor. */ +static void +ppc64_elf_hide_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h, + bfd_boolean force_local) +{ + _bfd_elf_link_hash_hide_symbol (info, h, force_local); + + if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) + { + struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh; + + if (fh == NULL) + { + const char *p, *q; + struct ppc_link_hash_table *htab; + char save; + + /* We aren't supposed to use alloca in BFD because on + systems which do not have alloca the version in libiberty + calls xmalloc, which might cause the program to crash + when it runs out of memory. This function doesn't have a + return status, so there's no way to gracefully return an + error. So cheat. We know that string[-1] can be safely + dereferenced; It's either a string in an ELF string + table, or allocated in an objalloc structure. */ + + p = h->root.root.string - 1; + save = *p; + *(char *) p = '.'; + htab = ppc_hash_table (info); + fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); + *(char *) p = save; + + /* Unfortunately, if it so happens that the string we were + looking for was allocated immediately before this string, + then we overwrote the string terminator. That's the only + reason the lookup should fail. */ + if (fh == NULL) + { + q = h->root.root.string + strlen (h->root.root.string); + while (q >= h->root.root.string && *q == *p) + --q, --p; + if (q < h->root.root.string && *p == '.') + fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); + } + if (fh != NULL) + { + ((struct ppc_link_hash_entry *) h)->oh = fh; + ((struct ppc_link_hash_entry *) fh)->oh = h; + } + } + if (fh != NULL) + _bfd_elf_link_hash_hide_symbol (info, fh, force_local); + } +} + +static bfd_boolean +get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp, + asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp, + unsigned long r_symndx, bfd *ibfd) +{ + Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + + if (r_symndx >= symtab_hdr->sh_info) + { + struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); + struct elf_link_hash_entry *h; + + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + if (hp != NULL) + *hp = h; + + if (symp != NULL) + *symp = NULL; + + if (symsecp != NULL) + { + asection *symsec = NULL; + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + symsec = h->root.u.def.section; + *symsecp = symsec; + } + + if (tls_maskp != NULL) + { + struct ppc_link_hash_entry *eh; + + eh = (struct ppc_link_hash_entry *) h; + *tls_maskp = &eh->tls_mask; + } + } + else + { + Elf_Internal_Sym *sym; + Elf_Internal_Sym *locsyms = *locsymsp; + + if (locsyms == NULL) + { + locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; + if (locsyms == NULL) + locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, + symtab_hdr->sh_info, + 0, NULL, NULL, NULL); + if (locsyms == NULL) + return FALSE; + *locsymsp = locsyms; + } + sym = locsyms + r_symndx; + + if (hp != NULL) + *hp = NULL; + + if (symp != NULL) + *symp = sym; + + if (symsecp != NULL) + { + asection *symsec = NULL; + if ((sym->st_shndx != SHN_UNDEF + && sym->st_shndx < SHN_LORESERVE) + || sym->st_shndx > SHN_HIRESERVE) + symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx); + *symsecp = symsec; + } + + if (tls_maskp != NULL) + { + struct got_entry **lgot_ents; + char *tls_mask; + + tls_mask = NULL; + lgot_ents = elf_local_got_ents (ibfd); + if (lgot_ents != NULL) + { + char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info); + tls_mask = &lgot_masks[r_symndx]; + } + *tls_maskp = tls_mask; + } + } + return TRUE; +} + +/* Returns TLS_MASKP for the given REL symbol. Function return is 0 on + error, 2 on a toc GD type suitable for optimization, 3 on a toc LD + type suitable for optimization, and 1 otherwise. */ + +static int +get_tls_mask (char **tls_maskp, unsigned long *toc_symndx, + Elf_Internal_Sym **locsymsp, + const Elf_Internal_Rela *rel, bfd *ibfd) +{ + unsigned long r_symndx; + int next_r; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + asection *sec; + bfd_vma off; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) + return 0; + + if ((*tls_maskp != NULL && **tls_maskp != 0) + || sec == NULL + || ppc64_elf_section_data (sec)->t_symndx == NULL) + return 1; + + /* Look inside a TOC section too. */ + if (h != NULL) + { + BFD_ASSERT (h->root.type == bfd_link_hash_defined); + off = h->root.u.def.value; + } + else + off = sym->st_value; + off += rel->r_addend; + BFD_ASSERT (off % 8 == 0); + r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8]; + next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1]; + if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) + return 0; + if (toc_symndx != NULL) + *toc_symndx = r_symndx; + if ((h == NULL + || ((h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) + && (next_r == -1 || next_r == -2)) + return 1 - next_r; + return 1; +} + +/* Adjust all global syms defined in opd sections. In gcc generated + code these will already have been done, but I suppose we have to + cater for all sorts of hand written assembly. */ + +static bfd_boolean +adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) +{ + struct ppc_link_hash_entry *eh; + asection *sym_sec; + long *opd_adjust; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + if (h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + return TRUE; + + eh = (struct ppc_link_hash_entry *) h; + if (eh->adjust_done) + return TRUE; + + sym_sec = eh->elf.root.u.def.section; + if (sym_sec != NULL + && elf_section_data (sym_sec) != NULL + && (opd_adjust = ppc64_elf_section_data (sym_sec)->opd.adjust) != NULL) + { + eh->elf.root.u.def.value += opd_adjust[eh->elf.root.u.def.value / 24]; + eh->adjust_done = 1; + } + return TRUE; +} + +/* Remove unused Official Procedure Descriptor entries. Currently we + only remove those associated with functions in discarded link-once + sections, or weakly defined functions that have been overridden. It + would be possible to remove many more entries for statically linked + applications. */ + +bfd_boolean +ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info) +{ + bfd *ibfd; + bfd_boolean some_edited = FALSE; + + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + asection *sec; + Elf_Internal_Rela *relstart, *rel, *relend; + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Sym *local_syms; + struct elf_link_hash_entry **sym_hashes; + bfd_vma offset; + bfd_size_type amt; + long *adjust; + bfd_boolean need_edit; + + sec = bfd_get_section_by_name (ibfd, ".opd"); + if (sec == NULL) + continue; + + amt = sec->_raw_size * sizeof (long) / 24; + adjust = ppc64_elf_section_data (sec)->opd.adjust; + if (adjust == NULL) + { + /* Must be a ld -r link. ie. check_relocs hasn't been + called. */ + adjust = bfd_zalloc (obfd, amt); + ppc64_elf_section_data (sec)->opd.adjust = adjust; + } + memset (adjust, 0, amt); + + if (sec->output_section == bfd_abs_section_ptr) + continue; + + /* Look through the section relocs. */ + if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) + continue; + + local_syms = NULL; + symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (ibfd); + + /* Read the relocations. */ + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + return FALSE; + + /* First run through the relocs to check they are sane, and to + determine whether we need to edit this opd section. */ + need_edit = FALSE; + offset = 0; + relend = relstart + sec->reloc_count; + for (rel = relstart; rel < relend; ) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + + /* .opd contains a regular array of 24 byte entries. We're + only interested in the reloc pointing to a function entry + point. */ + if (rel->r_offset != offset + || rel + 1 >= relend + || (rel + 1)->r_offset != offset + 8) + { + /* If someone messes with .opd alignment then after a + "ld -r" we might have padding in the middle of .opd. + Also, there's nothing to prevent someone putting + something silly in .opd with the assembler. No .opd + optimization for them! */ + (*_bfd_error_handler) + (_("%s: .opd is not a regular array of opd entries"), + bfd_archive_filename (ibfd)); + need_edit = FALSE; + break; + } + + if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 + || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) + { + (*_bfd_error_handler) + (_("%s: unexpected reloc type %u in .opd section"), + bfd_archive_filename (ibfd), r_type); + need_edit = FALSE; + break; + } + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + goto error_ret; + + if (sym_sec == NULL || sym_sec->owner == NULL) + { + const char *sym_name; + if (h != NULL) + sym_name = h->root.root.string; + else + sym_name = bfd_elf_local_sym_name (ibfd, sym); + + (*_bfd_error_handler) + (_("%s: undefined sym `%s' in .opd section"), + bfd_archive_filename (ibfd), + sym_name); + need_edit = FALSE; + break; + } + + /* opd entries are always for functions defined in the + current input bfd. If the symbol isn't defined in the + input bfd, then we won't be using the function in this + bfd; It must be defined in a linkonce section in another + bfd, or is weak. It's also possible that we are + discarding the function due to a linker script /DISCARD/, + which we test for via the output_section. */ + if (sym_sec->owner != ibfd + || sym_sec->output_section == bfd_abs_section_ptr) + need_edit = TRUE; + + offset += 24; + rel += 2; + /* Allow for the possibility of a reloc on the third word. */ + if (rel < relend + && rel->r_offset == offset - 8) + rel += 1; + } + + if (need_edit) + { + Elf_Internal_Rela *write_rel; + bfd_byte *rptr, *wptr; + bfd_boolean skip; + + /* This seems a waste of time as input .opd sections are all + zeros as generated by gcc, but I suppose there's no reason + this will always be so. We might start putting something in + the third word of .opd entries. */ + if ((sec->flags & SEC_IN_MEMORY) == 0) + { + bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size); + if (loc == NULL + || !bfd_get_section_contents (ibfd, sec, loc, 0, + sec->_raw_size)) + { + error_ret: + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + free (local_syms); + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + return FALSE; + } + sec->contents = loc; + sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); + } + + elf_section_data (sec)->relocs = relstart; + + wptr = sec->contents; + rptr = sec->contents; + write_rel = relstart; + skip = FALSE; + offset = 0; + for (rel = relstart; rel < relend; rel++) + { + unsigned long r_symndx; + asection *sym_sec; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_symndx, ibfd)) + goto error_ret; + + if (rel->r_offset == offset) + { + struct ppc_link_hash_entry *fdh = NULL; + if (h != NULL) + fdh = get_fdh ((struct ppc_link_hash_entry *) h, + ppc_hash_table (info)); + + skip = (sym_sec->owner != ibfd + || sym_sec->output_section == bfd_abs_section_ptr); + if (skip) + { + if (h != NULL && sym_sec->owner == ibfd) + { + /* Arrange for the function descriptor sym + to be dropped. */ + fdh->elf.root.u.def.value = 0; + fdh->elf.root.u.def.section = sym_sec; + } + } + else + { + /* We'll be keeping this opd entry. */ + + if (h != NULL) + { + /* Redefine the function descriptor symbol to + this location in the opd section. It is + necessary to update the value here rather + than using an array of adjustments as we do + for local symbols, because various places + in the generic ELF code use the value + stored in u.def.value. */ + fdh->elf.root.u.def.value = wptr - sec->contents; + fdh->adjust_done = 1; + } + + /* Local syms are a bit tricky. We could + tweak them as they can be cached, but + we'd need to look through the local syms + for the function descriptor sym which we + don't have at the moment. So keep an + array of adjustments. */ + adjust[rel->r_offset / 24] = wptr - rptr; + + if (wptr != rptr) + memcpy (wptr, rptr, 24); + wptr += 24; + } + rptr += 24; + offset += 24; + } + + if (skip) + { + BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info))); + if (info->shared) + { + /* We won't be needing dynamic relocs here. */ + struct ppc_dyn_relocs **pp; + struct ppc_dyn_relocs *p; + + if (h != NULL) + pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs; + else if (sym_sec != NULL) + pp = ((struct ppc_dyn_relocs **) + &elf_section_data (sym_sec)->local_dynrel); + else + pp = ((struct ppc_dyn_relocs **) + &elf_section_data (sec)->local_dynrel); + while ((p = *pp) != NULL) + { + if (p->sec == sec) + { + p->count -= 1; + if (p->count == 0) + *pp = p->next; + break; + } + pp = &p->next; + } + } + } + else + { + /* We need to adjust any reloc offsets to point to the + new opd entries. While we're at it, we may as well + remove redundant relocs. */ + rel->r_offset += wptr - rptr; + if (write_rel != rel) + memcpy (write_rel, rel, sizeof (*rel)); + ++write_rel; + } + } + + sec->_cooked_size = wptr - sec->contents; + sec->reloc_count = write_rel - relstart; + /* Fudge the size too, as this is used later in + elf_bfd_final_link if we are emitting relocs. */ + elf_section_data (sec)->rel_hdr.sh_size + = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize; + BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL); + some_edited = TRUE; + } + else if (elf_section_data (sec)->relocs != relstart) + free (relstart); + + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + { + if (!info->keep_memory) + free (local_syms); + else + symtab_hdr->contents = (unsigned char *) local_syms; + } + } + + if (some_edited) + elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); + + return TRUE; +} + +/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ + +asection * +ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + + htab = ppc_hash_table (info); + if (htab->tls_get_addr != NULL) + { + struct elf_link_hash_entry *h = htab->tls_get_addr; + + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + htab->tls_get_addr = h; + } + + return _bfd_elf_tls_setup (obfd, info); +} + +/* Run through all the TLS relocs looking for optimization + opportunities. The linker has been hacked (see ppc64elf.em) to do + a preliminary section layout so that we know the TLS segment + offsets. We can't optimize earlier because some optimizations need + to know the tp offset, and we need to optimize before allocating + dynamic relocations. */ + +bfd_boolean +ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) +{ + bfd *ibfd; + asection *sec; + struct ppc_link_hash_table *htab; + + if (info->relocatable || info->shared) + return TRUE; + + htab = ppc_hash_table (info); + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + Elf_Internal_Sym *locsyms = NULL; + + for (sec = ibfd->sections; sec != NULL; sec = sec->next) + if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) + { + Elf_Internal_Rela *relstart, *rel, *relend; + int expecting_tls_get_addr; + + /* Read the relocations. */ + relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, + info->keep_memory); + if (relstart == NULL) + return FALSE; + + expecting_tls_get_addr = 0; + relend = relstart + sec->reloc_count; + for (rel = relstart; rel < relend; rel++) + { + enum elf_ppc64_reloc_type r_type; + unsigned long r_symndx; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + asection *sym_sec; + char *tls_mask; + char tls_set, tls_clear, tls_type = 0; + bfd_vma value; + bfd_boolean ok_tprel, is_local; + + r_symndx = ELF64_R_SYM (rel->r_info); + if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, + r_symndx, ibfd)) + { + err_free_rel: + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + if (locsyms != NULL + && (elf_tdata (ibfd)->symtab_hdr.contents + != (unsigned char *) locsyms)) + free (locsyms); + return FALSE; + } + + if (h != NULL) + { + if (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + continue; + value = h->root.u.def.value; + } + else + { + value = sym->st_value; + + if (elf_section_data (sym_sec) != NULL) + { + long *adjust; + adjust = ppc64_elf_section_data (sym_sec)->opd.adjust; + if (adjust != NULL) + value += adjust[value / 24]; + } + } + + ok_tprel = FALSE; + is_local = FALSE; + if (h == NULL + || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) + { + is_local = TRUE; + value += sym_sec->output_offset; + value += sym_sec->output_section->vma; + value -= htab->elf.tls_sec->vma; + ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) + < (bfd_vma) 1 << 32); + } + + r_type = ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + /* These relocs should never be against a symbol + defined in a shared lib. Leave them alone if + that turns out to be the case. */ + ppc64_tlsld_got (ibfd)->refcount -= 1; + if (!is_local) + continue; + + /* LD -> LE */ + tls_set = 0; + tls_clear = TLS_LD; + tls_type = TLS_TLS | TLS_LD; + expecting_tls_get_addr = 1; + break; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + if (ok_tprel) + /* GD -> LE */ + tls_set = 0; + else + /* GD -> IE */ + tls_set = TLS_TLS | TLS_TPRELGD; + tls_clear = TLS_GD; + tls_type = TLS_TLS | TLS_GD; + expecting_tls_get_addr = 1; + break; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + expecting_tls_get_addr = 0; + if (ok_tprel) + { + /* IE -> LE */ + tls_set = 0; + tls_clear = TLS_TPREL; + tls_type = TLS_TLS | TLS_TPREL; + break; + } + else + continue; + + case R_PPC64_REL14: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL24: + if (h != NULL + && h == htab->tls_get_addr) + { + if (!expecting_tls_get_addr + && rel != relstart + && ((ELF64_R_TYPE (rel[-1].r_info) + == R_PPC64_TOC16) + || (ELF64_R_TYPE (rel[-1].r_info) + == R_PPC64_TOC16_LO))) + { + /* Check for toc tls entries. */ + char *toc_tls; + int retval; + + retval = get_tls_mask (&toc_tls, NULL, &locsyms, + rel - 1, ibfd); + if (retval == 0) + goto err_free_rel; + if (toc_tls != NULL) + expecting_tls_get_addr = retval > 1; + } + + if (expecting_tls_get_addr) + { + struct plt_entry *ent; + for (ent = h->plt.plist; ent; ent = ent->next) + if (ent->addend == 0) + { + if (ent->plt.refcount > 0) + ent->plt.refcount -= 1; + break; + } + } + } + expecting_tls_get_addr = 0; + continue; + + case R_PPC64_TPREL64: + expecting_tls_get_addr = 0; + if (ok_tprel) + { + /* IE -> LE */ + tls_set = TLS_EXPLICIT; + tls_clear = TLS_TPREL; + break; + } + else + continue; + + case R_PPC64_DTPMOD64: + expecting_tls_get_addr = 0; + if (rel + 1 < relend + && (rel[1].r_info + == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) + && rel[1].r_offset == rel->r_offset + 8) + { + if (ok_tprel) + /* GD -> LE */ + tls_set = TLS_EXPLICIT | TLS_GD; + else + /* GD -> IE */ + tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD; + tls_clear = TLS_GD; + } + else + { + if (!is_local) + continue; + + /* LD -> LE */ + tls_set = TLS_EXPLICIT; + tls_clear = TLS_LD; + } + break; + + default: + expecting_tls_get_addr = 0; + continue; + } + + if ((tls_set & TLS_EXPLICIT) == 0) + { + struct got_entry *ent; + + /* Adjust got entry for this reloc. */ + if (h != NULL) + ent = h->got.glist; + else + ent = elf_local_got_ents (ibfd)[r_symndx]; + + for (; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->owner == ibfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + abort (); + + if (tls_set == 0) + { + /* We managed to get rid of a got entry. */ + if (ent->got.refcount > 0) + ent->got.refcount -= 1; + } + } + else if (h != NULL) + { + struct ppc_link_hash_entry * eh; + struct ppc_dyn_relocs **pp; + struct ppc_dyn_relocs *p; + + /* Adjust dynamic relocs. */ + eh = (struct ppc_link_hash_entry *) h; + for (pp = &eh->dyn_relocs; + (p = *pp) != NULL; + pp = &p->next) + if (p->sec == sec) + { + /* If we got rid of a DTPMOD/DTPREL reloc + pair then we'll lose one or two dyn + relocs. */ + if (tls_set == (TLS_EXPLICIT | TLS_GD)) + p->count -= 1; + p->count -= 1; + if (p->count == 0) + *pp = p->next; + break; + } + } + + *tls_mask |= tls_set; + *tls_mask &= ~tls_clear; + } + + if (elf_section_data (sec)->relocs != relstart) + free (relstart); + } + + if (locsyms != NULL + && (elf_tdata (ibfd)->symtab_hdr.contents + != (unsigned char *) locsyms)) + { + if (!info->keep_memory) + free (locsyms); + else + elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms; + } + } + return TRUE; +} + +/* Allocate space in .plt, .got and associated reloc sections for + dynamic relocs. */ + +static bfd_boolean +allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) +{ + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + asection *s; + struct ppc_link_hash_entry *eh; + struct ppc_dyn_relocs *p; + struct got_entry *gent; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + if (h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + info = (struct bfd_link_info *) inf; + htab = ppc_hash_table (info); + + if (htab->elf.dynamic_sections_created + && h->dynindx != -1 + && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) + { + struct plt_entry *pent; + bfd_boolean doneone = FALSE; + for (pent = h->plt.plist; pent != NULL; pent = pent->next) + if (pent->plt.refcount > 0) + { + BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor); + + /* If this is the first .plt entry, make room for the special + first entry. */ + s = htab->plt; + if (s->_raw_size == 0) + s->_raw_size += PLT_INITIAL_ENTRY_SIZE; + + pent->plt.offset = s->_raw_size; + + /* Make room for this entry. */ + s->_raw_size += PLT_ENTRY_SIZE; + + /* Make room for the .glink code. */ + s = htab->glink; + if (s->_raw_size == 0) + s->_raw_size += GLINK_CALL_STUB_SIZE; + /* We need bigger stubs past index 32767. */ + if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4) + s->_raw_size += 4; + s->_raw_size += 2*4; + + /* We also need to make an entry in the .rela.plt section. */ + s = htab->relplt; + s->_raw_size += sizeof (Elf64_External_Rela); + doneone = TRUE; + } + else + pent->plt.offset = (bfd_vma) -1; + if (!doneone) + { + h->plt.plist = NULL; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + } + else + { + h->plt.plist = NULL; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + + eh = (struct ppc_link_hash_entry *) h; + /* Run through the TLS GD got entries first if we're changing them + to TPREL. */ + if ((eh->tls_mask & TLS_TPRELGD) != 0) + for (gent = h->got.glist; gent != NULL; gent = gent->next) + if (gent->got.refcount > 0 + && (gent->tls_type & TLS_GD) != 0) + { + /* This was a GD entry that has been converted to TPREL. If + there happens to be a TPREL entry we can use that one. */ + struct got_entry *ent; + for (ent = h->got.glist; ent != NULL; ent = ent->next) + if (ent->got.refcount > 0 + && (ent->tls_type & TLS_TPREL) != 0 + && ent->addend == gent->addend + && ent->owner == gent->owner) + { + gent->got.refcount = 0; + break; + } + + /* If not, then we'll be using our own TPREL entry. */ + if (gent->got.refcount != 0) + gent->tls_type = TLS_TLS | TLS_TPREL; + } + + for (gent = h->got.glist; gent != NULL; gent = gent->next) + if (gent->got.refcount > 0) + { + bfd_boolean dyn; + + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic, + nor will all TLS symbols. */ + if (h->dynindx == -1 + && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + if ((gent->tls_type & TLS_LD) != 0 + && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) + { + gent->got.offset = ppc64_tlsld_got (gent->owner)->offset; + continue; + } + + s = ppc64_elf_tdata (gent->owner)->got; + gent->got.offset = s->_raw_size; + s->_raw_size + += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8; + dyn = htab->elf.dynamic_sections_created; + if ((info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) + && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak)) + ppc64_elf_tdata (gent->owner)->relgot->_raw_size + += (gent->tls_type & eh->tls_mask & TLS_GD + ? 2 * sizeof (Elf64_External_Rela) + : sizeof (Elf64_External_Rela)); + } + else + gent->got.offset = (bfd_vma) -1; + + if (eh->dyn_relocs == NULL) + return TRUE; + + /* In the shared -Bsymbolic case, discard space allocated for + dynamic pc-relative relocs against symbols which turn out to be + defined in regular objects. For the normal shared case, discard + space for relocs that have become local due to symbol visibility + changes. */ + + if (info->shared) + { + /* Relocs that use pc_count are those that appear on a call insn, + or certain REL relocs (see MUST_BE_DYN_RELOC) that can be + generated via assembly. We want calls to protected symbols to + resolve directly to the function rather than going via the plt. + If people want function pointer comparisons to work as expected + then they should avoid writing weird assembly. */ + if (SYMBOL_CALLS_LOCAL (info, h)) + { + struct ppc_dyn_relocs **pp; + + for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) + { + p->count -= p->pc_count; + p->pc_count = 0; + if (p->count == 0) + *pp = p->next; + else + pp = &p->next; + } + } + + /* Also discard relocs on undefined weak syms with non-default + visibility. */ + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak) + eh->dyn_relocs = NULL; + } + else if (ELIMINATE_COPY_RELOCS) + { + /* For the non-shared case, discard space for relocs against + symbols which turn out to need copy relocs or are not + dynamic. */ + + if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) + { + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + if (h->dynindx == -1 + && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + /* If that succeeded, we know we'll be keeping all the + relocs. */ + if (h->dynindx != -1) + goto keep; + } + + eh->dyn_relocs = NULL; + + keep: ; + } + + /* Finally, allocate space. */ + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *sreloc = elf_section_data (p->sec)->sreloc; + sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); + } + + return TRUE; +} + +/* Find any dynamic relocs that apply to read-only sections. */ + +static bfd_boolean +readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) +{ + struct ppc_link_hash_entry *eh; + struct ppc_dyn_relocs *p; + + if (h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + eh = (struct ppc_link_hash_entry *) h; + for (p = eh->dyn_relocs; p != NULL; p = p->next) + { + asection *s = p->sec->output_section; + + if (s != NULL && (s->flags & SEC_READONLY) != 0) + { + struct bfd_link_info *info = inf; + + info->flags |= DF_TEXTREL; + + /* Not an error, just cut short the traversal. */ + return FALSE; + } + } + return TRUE; +} + +/* Set the sizes of the dynamic sections. */ + +static bfd_boolean +ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + bfd *dynobj; + asection *s; + bfd_boolean relocs; + bfd *ibfd; + + htab = ppc_hash_table (info); + dynobj = htab->elf.dynobj; + if (dynobj == NULL) + abort (); + + if (htab->elf.dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (info->executable) + { + s = bfd_get_section_by_name (dynobj, ".interp"); + if (s == NULL) + abort (); + s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; + s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; + } + } + + /* Set up .got offsets for local syms, and space for local dynamic + relocs. */ + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + struct got_entry **lgot_ents; + struct got_entry **end_lgot_ents; + char *lgot_masks; + bfd_size_type locsymcount; + Elf_Internal_Shdr *symtab_hdr; + asection *srel; + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) + continue; + + if (ppc64_tlsld_got (ibfd)->refcount > 0) + { + s = ppc64_elf_tdata (ibfd)->got; + ppc64_tlsld_got (ibfd)->offset = s->_raw_size; + s->_raw_size += 16; + if (info->shared) + { + srel = ppc64_elf_tdata (ibfd)->relgot; + srel->_raw_size += sizeof (Elf64_External_Rela); + } + } + else + ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1; + + for (s = ibfd->sections; s != NULL; s = s->next) + { + struct ppc_dyn_relocs *p; + + for (p = *((struct ppc_dyn_relocs **) + &elf_section_data (s)->local_dynrel); + p != NULL; + p = p->next) + { + if (!bfd_is_abs_section (p->sec) + && bfd_is_abs_section (p->sec->output_section)) + { + /* Input section has been discarded, either because + it is a copy of a linkonce section or due to + linker script /DISCARD/, so we'll be discarding + the relocs too. */ + } + else if (p->count != 0) + { + srel = elf_section_data (p->sec)->sreloc; + srel->_raw_size += p->count * sizeof (Elf64_External_Rela); + if ((p->sec->output_section->flags & SEC_READONLY) != 0) + info->flags |= DF_TEXTREL; + } + } + } + + lgot_ents = elf_local_got_ents (ibfd); + if (!lgot_ents) + continue; + + symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + locsymcount = symtab_hdr->sh_info; + end_lgot_ents = lgot_ents + locsymcount; + lgot_masks = (char *) end_lgot_ents; + s = ppc64_elf_tdata (ibfd)->got; + srel = ppc64_elf_tdata (ibfd)->relgot; + for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) + { + struct got_entry *ent; + + for (ent = *lgot_ents; ent != NULL; ent = ent->next) + if (ent->got.refcount > 0) + { + if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) + { + if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1) + { + ppc64_tlsld_got (ibfd)->offset = s->_raw_size; + s->_raw_size += 16; + if (info->shared) + srel->_raw_size += sizeof (Elf64_External_Rela); + } + ent->got.offset = ppc64_tlsld_got (ibfd)->offset; + } + else + { + ent->got.offset = s->_raw_size; + if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) + { + s->_raw_size += 16; + if (info->shared) + srel->_raw_size += 2 * sizeof (Elf64_External_Rela); + } + else + { + s->_raw_size += 8; + if (info->shared) + srel->_raw_size += sizeof (Elf64_External_Rela); + } + } + } + else + ent->got.offset = (bfd_vma) -1; + } + } + + /* Allocate global sym .plt and .got entries, and space for global + sym dynamic relocs. */ + elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); + + /* We now have determined the sizes of the various dynamic sections. + Allocate memory for them. */ + relocs = FALSE; + for (s = dynobj->sections; s != NULL; s = s->next) + { + if ((s->flags & SEC_LINKER_CREATED) == 0) + continue; + + /* Reset _cooked_size since prelim layout will set it wrongly, + and a non-zero _cooked_size sticks. */ + s->_cooked_size = 0; + + if (s == htab->brlt || s == htab->relbrlt) + /* These haven't been allocated yet; don't strip. */ + continue; + else if (s == htab->got + || s == htab->plt + || s == htab->glink) + { + /* Strip this section if we don't need it; see the + comment below. */ + } + else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) + { + if (s->_raw_size == 0) + { + /* If we don't need this section, strip it from the + output file. This is mostly to handle .rela.bss and + .rela.plt. We must create both sections in + create_dynamic_sections, because they must be created + before the linker maps input sections to output + sections. The linker does that before + adjust_dynamic_symbol is called, and it is that + function which decides whether anything needs to go + into these sections. */ + } + else + { + if (s != htab->relplt) + relocs = TRUE; + + /* We use the reloc_count field as a counter if we need + to copy relocs into the output file. */ + s->reloc_count = 0; + } + } + else + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } + + if (s->_raw_size == 0) + { + _bfd_strip_section_from_output (info, s); + continue; + } + + /* .plt is in the bss section. We don't initialise it. */ + if (s == htab->plt) + continue; + + /* Allocate memory for the section contents. We use bfd_zalloc + here in case unused entries are not reclaimed before the + section's contents are written out. This should not happen, + but this way if it does we get a R_PPC64_NONE reloc in .rela + sections instead of garbage. + We also rely on the section contents being zero when writing + the GOT. */ + s->contents = bfd_zalloc (dynobj, s->_raw_size); + if (s->contents == NULL) + return FALSE; + } + + for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) + { + s = ppc64_elf_tdata (ibfd)->got; + if (s != NULL && s != htab->got) + { + s->_cooked_size = 0; + if (s->_raw_size == 0) + _bfd_strip_section_from_output (info, s); + else + { + s->contents = bfd_zalloc (ibfd, s->_raw_size); + if (s->contents == NULL) + return FALSE; + } + } + s = ppc64_elf_tdata (ibfd)->relgot; + if (s != NULL) + { + s->_cooked_size = 0; + if (s->_raw_size == 0) + _bfd_strip_section_from_output (info, s); + else + { + s->contents = bfd_zalloc (ibfd, s->_raw_size); + if (s->contents == NULL) + return FALSE; + relocs = TRUE; + s->reloc_count = 0; + } + } + } + + if (htab->elf.dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in ppc64_elf_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ +#define add_dynamic_entry(TAG, VAL) \ + _bfd_elf_add_dynamic_entry (info, TAG, VAL) + + if (info->executable) + { + if (!add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; + } + + if (htab->plt != NULL && htab->plt->_raw_size != 0) + { + if (!add_dynamic_entry (DT_PLTGOT, 0) + || !add_dynamic_entry (DT_PLTRELSZ, 0) + || !add_dynamic_entry (DT_PLTREL, DT_RELA) + || !add_dynamic_entry (DT_JMPREL, 0) + || !add_dynamic_entry (DT_PPC64_GLINK, 0)) + return FALSE; + } + + if (NO_OPD_RELOCS) + { + if (!add_dynamic_entry (DT_PPC64_OPD, 0) + || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) + return FALSE; + } + + if (relocs) + { + if (!add_dynamic_entry (DT_RELA, 0) + || !add_dynamic_entry (DT_RELASZ, 0) + || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) + return FALSE; + + /* If any dynamic relocs apply to a read-only section, + then we need a DT_TEXTREL entry. */ + if ((info->flags & DF_TEXTREL) == 0) + elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); + + if ((info->flags & DF_TEXTREL) != 0) + { + if (!add_dynamic_entry (DT_TEXTREL, 0)) + return FALSE; + } + } + } +#undef add_dynamic_entry + + return TRUE; +} + +/* Determine the type of stub needed, if any, for a call. */ + +static inline enum ppc_stub_type +ppc_type_of_stub (asection *input_sec, + const Elf_Internal_Rela *rel, + struct ppc_link_hash_entry **hash, + bfd_vma destination) +{ + struct ppc_link_hash_entry *h = *hash; + bfd_vma location; + bfd_vma branch_offset; + bfd_vma max_branch_offset; + enum elf_ppc64_reloc_type r_type; + + if (h != NULL) + { + if (h->oh != NULL + && h->oh->dynindx != -1) + { + struct plt_entry *ent; + for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->plt.offset != (bfd_vma) -1) + { + *hash = (struct ppc_link_hash_entry *) h->oh; + return ppc_stub_plt_call; + } + } + + if (!(h->elf.root.type == bfd_link_hash_defined + || h->elf.root.type == bfd_link_hash_defweak) + || h->elf.root.u.def.section->output_section == NULL) + return ppc_stub_none; + } + + /* Determine where the call point is. */ + location = (input_sec->output_offset + + input_sec->output_section->vma + + rel->r_offset); + + branch_offset = destination - location; + r_type = ELF64_R_TYPE (rel->r_info); + + /* Determine if a long branch stub is needed. */ + max_branch_offset = 1 << 25; + if (r_type != R_PPC64_REL24) + max_branch_offset = 1 << 15; + + if (branch_offset + max_branch_offset >= 2 * max_branch_offset) + /* We need a stub. Figure out whether a long_branch or plt_branch + is needed later. */ + return ppc_stub_long_branch; + + return ppc_stub_none; +} + +/* Build a .plt call stub. */ + +static inline bfd_byte * +build_plt_stub (bfd *obfd, bfd_byte *p, int offset) +{ +#define PPC_LO(v) ((v) & 0xffff) +#define PPC_HI(v) (((v) >> 16) & 0xffff) +#define PPC_HA(v) PPC_HI ((v) + 0x8000) + + bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; + bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; + bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; + if (PPC_HA (offset + 8) != PPC_HA (offset)) + bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4; + offset += 8; + bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4; + if (PPC_HA (offset + 8) != PPC_HA (offset)) + bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4; + offset += 8; + bfd_put_32 (obfd, MTCTR_R11, p), p += 4; + bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; + bfd_put_32 (obfd, BCTR, p), p += 4; + return p; +} + +static bfd_boolean +ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) +{ + struct ppc_stub_hash_entry *stub_entry; + struct ppc_branch_hash_entry *br_entry; + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + bfd_byte *loc; + bfd_byte *p; + unsigned int indx; + struct plt_entry *ent; + bfd_vma off; + int size; + + /* Massage our args to the form they really have. */ + stub_entry = (struct ppc_stub_hash_entry *) gen_entry; + info = in_arg; + + htab = ppc_hash_table (info); + + /* Make a note of the offset within the stubs for this entry. */ + stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size; + loc = stub_entry->stub_sec->contents + stub_entry->stub_offset; + + htab->stub_count[stub_entry->stub_type - 1] += 1; + switch (stub_entry->stub_type) + { + case ppc_stub_long_branch: + case ppc_stub_long_branch_r2off: + /* Branches are relative. This is where we are going to. */ + off = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + + /* And this is where we are coming from. */ + off -= (stub_entry->stub_offset + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + + if (stub_entry->stub_type != ppc_stub_long_branch_r2off) + size = 4; + else + { + bfd_vma r2off; + + r2off = (htab->stub_group[stub_entry->target_section->id].toc_off + - htab->stub_group[stub_entry->id_sec->id].toc_off); + bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); + loc += 4; + off -= 12; + size = 16; + } + bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc); + + BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26)); + break; + + case ppc_stub_plt_branch: + case ppc_stub_plt_branch_r2off: + br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, + stub_entry->root.string + 9, + FALSE, FALSE); + if (br_entry == NULL) + { + (*_bfd_error_handler) (_("can't find branch stub `%s'"), + stub_entry->root.string + 9); + htab->stub_error = TRUE; + return FALSE; + } + + off = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + + bfd_put_64 (htab->brlt->owner, off, + htab->brlt->contents + br_entry->offset); + + if (info->shared) + { + /* Create a reloc for the branch lookup table entry. */ + Elf_Internal_Rela rela; + bfd_byte *rl; + + rela.r_offset = (br_entry->offset + + htab->brlt->output_offset + + htab->brlt->output_section->vma); + rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + rela.r_addend = off; + + rl = htab->relbrlt->contents; + rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl); + } + + off = (br_entry->offset + + htab->brlt->output_offset + + htab->brlt->output_section->vma + - elf_gp (htab->brlt->output_section->owner) + - htab->stub_group[stub_entry->id_sec->id].toc_off); + + if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) + { + (*_bfd_error_handler) + (_("linkage table error against `%s'"), + stub_entry->root.string); + bfd_set_error (bfd_error_bad_value); + htab->stub_error = TRUE; + return FALSE; + } + + indx = off; + if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) + { + bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); + size = 16; + } + else + { + bfd_vma r2off; + + r2off = (htab->stub_group[stub_entry->target_section->id].toc_off + - htab->stub_group[stub_entry->id_sec->id].toc_off); + bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); + size = 28; + } + loc += 4; + bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc); + loc += 4; + bfd_put_32 (htab->stub_bfd, BCTR, loc); + break; + + case ppc_stub_plt_call: + /* Do the best we can for shared libraries built without + exporting ".foo" for each "foo". This can happen when symbol + versioning scripts strip all bar a subset of symbols. */ + if (stub_entry->h->oh->root.type != bfd_link_hash_defined + && stub_entry->h->oh->root.type != bfd_link_hash_defweak) + { + /* Point the symbol at the stub. There may be multiple stubs, + we don't really care; The main thing is to make this sym + defined somewhere. Maybe defining the symbol in the stub + section is a silly idea. If we didn't do this, htab->top_id + could disappear. */ + stub_entry->h->oh->root.type = bfd_link_hash_defined; + stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec; + stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset; + } + + /* Now build the stub. */ + off = (bfd_vma) -1; + for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == stub_entry->addend) + { + off = ent->plt.offset; + break; + } + if (off >= (bfd_vma) -2) + abort (); + + off &= ~ (bfd_vma) 1; + off += (htab->plt->output_offset + + htab->plt->output_section->vma + - elf_gp (htab->plt->output_section->owner) + - htab->stub_group[stub_entry->id_sec->id].toc_off); + + if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) + { + (*_bfd_error_handler) + (_("linkage table error against `%s'"), + stub_entry->h->elf.root.root.string); + bfd_set_error (bfd_error_bad_value); + htab->stub_error = TRUE; + return FALSE; + } + + p = build_plt_stub (htab->stub_bfd, loc, off); + size = p - loc; + break; + + default: + BFD_FAIL (); + return FALSE; + } + + stub_entry->stub_sec->_cooked_size += size; + + if (htab->emit_stub_syms + && !(stub_entry->stub_type == ppc_stub_plt_call + && stub_entry->h->oh->root.type == bfd_link_hash_defined + && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec + && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset)) + { + struct elf_link_hash_entry *h; + h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string, + TRUE, FALSE, FALSE); + if (h == NULL) + return FALSE; + if (h->root.type == bfd_link_hash_new) + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = stub_entry->stub_sec; + h->root.u.def.value = stub_entry->stub_offset; + h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_DEF_REGULAR + | ELF_LINK_HASH_REF_REGULAR_NONWEAK + | ELF_LINK_FORCED_LOCAL); + } + } + + return TRUE; +} + +/* As above, but don't actually build the stub. Just bump offset so + we know stub section sizes, and select plt_branch stubs where + long_branch stubs won't do. */ + +static bfd_boolean +ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) +{ + struct ppc_stub_hash_entry *stub_entry; + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + bfd_vma off; + int size; + + /* Massage our args to the form they really have. */ + stub_entry = (struct ppc_stub_hash_entry *) gen_entry; + info = in_arg; + + htab = ppc_hash_table (info); + + if (stub_entry->stub_type == ppc_stub_plt_call) + { + struct plt_entry *ent; + off = (bfd_vma) -1; + for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == stub_entry->addend) + { + off = ent->plt.offset & ~(bfd_vma) 1; + break; + } + if (off >= (bfd_vma) -2) + abort (); + off += (htab->plt->output_offset + + htab->plt->output_section->vma + - elf_gp (htab->plt->output_section->owner) + - htab->stub_group[stub_entry->id_sec->id].toc_off); + + size = PLT_CALL_STUB_SIZE; + if (PPC_HA (off + 16) != PPC_HA (off)) + size += 4; + } + else + { + /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off + variants. */ + off = (stub_entry->target_value + + stub_entry->target_section->output_offset + + stub_entry->target_section->output_section->vma); + off -= (stub_entry->stub_sec->_raw_size + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + + /* Reset the stub type from the plt variant in case we now + can reach with a shorter stub. */ + if (stub_entry->stub_type >= ppc_stub_plt_branch) + stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; + + size = 4; + if (stub_entry->stub_type == ppc_stub_long_branch_r2off) + { + off -= 12; + size = 16; + } + + /* If the branch offset if too big, use a ppc_stub_plt_branch. */ + if (off + (1 << 25) >= (bfd_vma) (1 << 26)) + { + struct ppc_branch_hash_entry *br_entry; + + br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, + stub_entry->root.string + 9, + TRUE, FALSE); + if (br_entry == NULL) + { + (*_bfd_error_handler) (_("can't build branch stub `%s'"), + stub_entry->root.string + 9); + htab->stub_error = TRUE; + return FALSE; + } + + if (br_entry->iter != htab->stub_iteration) + { + br_entry->iter = htab->stub_iteration; + br_entry->offset = htab->brlt->_raw_size; + htab->brlt->_raw_size += 8; + + if (info->shared) + htab->relbrlt->_raw_size += sizeof (Elf64_External_Rela); + } + + stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; + size = 16; + if (stub_entry->stub_type != ppc_stub_plt_branch) + size = 28; + } + } + + stub_entry->stub_sec->_raw_size += size; + return TRUE; +} + +/* Set up various things so that we can make a list of input sections + for each output section included in the link. Returns -1 on error, + 0 when no stubs will be needed, and 1 on success. */ + +int +ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) +{ + bfd *input_bfd; + int top_id, top_index, id; + asection *section; + asection **input_list; + bfd_size_type amt; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (htab->brlt == NULL) + return 0; + + /* Find the top input section id. */ + for (input_bfd = info->input_bfds, top_id = 3; + input_bfd != NULL; + input_bfd = input_bfd->link_next) + { + for (section = input_bfd->sections; + section != NULL; + section = section->next) + { + if (top_id < section->id) + top_id = section->id; + } + } + + htab->top_id = top_id; + amt = sizeof (struct map_stub) * (top_id + 1); + htab->stub_group = bfd_zmalloc (amt); + if (htab->stub_group == NULL) + return -1; + + /* Set toc_off for com, und, abs and ind sections. */ + for (id = 0; id < 3; id++) + htab->stub_group[id].toc_off = TOC_BASE_OFF; + + elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd); + + /* We can't use output_bfd->section_count here to find the top output + section index as some sections may have been removed, and + _bfd_strip_section_from_output doesn't renumber the indices. */ + for (section = output_bfd->sections, top_index = 0; + section != NULL; + section = section->next) + { + if (top_index < section->index) + top_index = section->index; + } + + htab->top_index = top_index; + amt = sizeof (asection *) * (top_index + 1); + input_list = bfd_zmalloc (amt); + htab->input_list = input_list; + if (input_list == NULL) + return -1; + + return 1; +} + +/* The linker repeatedly calls this function for each TOC input section + and linker generated GOT section. Group input bfds such that the toc + within a group is less than 64k in size. Will break with cute linker + scripts that play games with dot in the output toc section. */ + +void +ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + if (!htab->no_multi_toc) + { + bfd_vma addr = isec->output_offset + isec->output_section->vma; + bfd_vma off = addr - htab->toc_curr; + if (off + isec->_raw_size > 0x10000) + { + htab->toc_curr = addr; + htab->multi_toc_needed = 1; + } + elf_gp (isec->owner) = (htab->toc_curr + - elf_gp (isec->output_section->owner) + + TOC_BASE_OFF); + } +} + +/* Called after the last call to the above function. */ + +void +ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + /* toc_curr tracks the TOC offset used for code sections below in + ppc64_elf_next_input_section. Start off at 0x8000. */ + htab->toc_curr = TOC_BASE_OFF; +} + +/* No toc references were found in ISEC. If the code in ISEC makes no + calls, then there's no need to use toc adjusting stubs when branching + into ISEC. Actually, indirect calls from ISEC are OK as they will + load r2. */ + +static int +toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) +{ + bfd_byte *contents; + bfd_size_type i; + int ret; + int branch_ok; + + /* We know none of our code bearing sections will need toc stubs. */ + if ((isec->flags & SEC_LINKER_CREATED) != 0) + return 0; + + if (isec->_raw_size == 0) + return 0; + + /* Hack for linux kernel. .fixup contains branches, but only back to + the function that hit an exception. */ + branch_ok = strcmp (isec->name, ".fixup") == 0; + + contents = elf_section_data (isec)->this_hdr.contents; + if (contents == NULL) + { + contents = bfd_malloc (isec->_raw_size); + if (contents == NULL) + return -1; + if (! bfd_get_section_contents (isec->owner, isec, contents, + 0, isec->_raw_size)) + { + free (contents); + return -1; + } + if (info->keep_memory) + elf_section_data (isec)->this_hdr.contents = contents; + } + + /* Code scan, because we don't necessarily have relocs on calls to + static functions. */ + ret = 0; + for (i = 0; i < isec->_raw_size; i += 4) + { + unsigned long insn = bfd_get_32 (isec->owner, contents + i); + /* Is this a branch? */ + if ((insn & (0x3f << 26)) == (18 << 26) + /* If branch and link, it's a function call. */ + && ((insn & 1) != 0 + /* Sibling calls use a plain branch. I don't know a way + of deciding whether a branch is really a sibling call. */ + || !branch_ok)) + { + ret = 1; + break; + } + } + + if (elf_section_data (isec)->this_hdr.contents != contents) + free (contents); + return ret; +} + +/* The linker repeatedly calls this function for each input section, + in the order that input sections are linked into output sections. + Build lists of input sections to determine groupings between which + we may insert linker stubs. */ + +bfd_boolean +ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + int ret; + + if ((isec->output_section->flags & SEC_CODE) != 0 + && isec->output_section->index <= htab->top_index) + { + asection **list = htab->input_list + isec->output_section->index; + /* Steal the link_sec pointer for our list. */ +#define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) + /* This happens to make the list in reverse order, + which is what we want. */ + PREV_SEC (isec) = *list; + *list = isec; + } + + /* If a code section has a function that uses the TOC then we need + to use the right TOC (obviously). Also, make sure that .opd gets + the correct TOC value for R_PPC64_TOC relocs that don't have or + can't find their function symbol (shouldn't ever happen now). */ + if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0) + { + if (elf_gp (isec->owner) != 0) + htab->toc_curr = elf_gp (isec->owner); + } + else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0) + return FALSE; + else + isec->has_gp_reloc = ret; + + /* Functions that don't use the TOC can belong in any TOC group. + Use the last TOC base. This happens to make _init and _fini + pasting work. */ + htab->stub_group[isec->id].toc_off = htab->toc_curr; + return TRUE; +} + +/* See whether we can group stub sections together. Grouping stub + sections may result in fewer stubs. More importantly, we need to + put all .init* and .fini* stubs at the beginning of the .init or + .fini output sections respectively, because glibc splits the + _init and _fini functions into multiple parts. Putting a stub in + the middle of a function is not a good idea. */ + +static void +group_sections (struct ppc_link_hash_table *htab, + bfd_size_type stub_group_size, + bfd_boolean stubs_always_before_branch) +{ + asection **list = htab->input_list + htab->top_index; + do + { + asection *tail = *list; + while (tail != NULL) + { + asection *curr; + asection *prev; + bfd_size_type total; + bfd_boolean big_sec; + bfd_vma curr_toc; + + curr = tail; + if (tail->_cooked_size) + total = tail->_cooked_size; + else + total = tail->_raw_size; + big_sec = total >= stub_group_size; + curr_toc = htab->stub_group[tail->id].toc_off; + + while ((prev = PREV_SEC (curr)) != NULL + && ((total += curr->output_offset - prev->output_offset) + < stub_group_size) + && htab->stub_group[prev->id].toc_off == curr_toc) + curr = prev; + + /* OK, the size from the start of CURR to the end is less + than stub_group_size and thus can be handled by one stub + section. (or the tail section is itself larger than + stub_group_size, in which case we may be toast.) We + should really be keeping track of the total size of stubs + added here, as stubs contribute to the final output + section size. That's a little tricky, and this way will + only break if stubs added make the total size more than + 2^25, ie. for the default stub_group_size, if stubs total + more than 2097152 bytes, or nearly 75000 plt call stubs. */ + do + { + prev = PREV_SEC (tail); + /* Set up this stub group. */ + htab->stub_group[tail->id].link_sec = curr; + } + while (tail != curr && (tail = prev) != NULL); + + /* But wait, there's more! Input sections up to stub_group_size + bytes before the stub section can be handled by it too. + Don't do this if we have a really large section after the + stubs, as adding more stubs increases the chance that + branches may not reach into the stub section. */ + if (!stubs_always_before_branch && !big_sec) + { + total = 0; + while (prev != NULL + && ((total += tail->output_offset - prev->output_offset) + < stub_group_size) + && htab->stub_group[prev->id].toc_off == curr_toc) + { + tail = prev; + prev = PREV_SEC (tail); + htab->stub_group[tail->id].link_sec = curr; + } + } + tail = prev; + } + } + while (list-- != htab->input_list); + free (htab->input_list); +#undef PREV_SEC +} + +/* Determine and set the size of the stub section for a final link. + + The basic idea here is to examine all the relocations looking for + PC-relative calls to a target that is unreachable with a "bl" + instruction. */ + +bfd_boolean +ppc64_elf_size_stubs (bfd *output_bfd, + struct bfd_link_info *info, + bfd_signed_vma group_size, + asection *(*add_stub_section) (const char *, asection *), + void (*layout_sections_again) (void)) +{ + bfd_size_type stub_group_size; + bfd_boolean stubs_always_before_branch; + struct ppc_link_hash_table *htab = ppc_hash_table (info); + + /* Stash our params away. */ + htab->add_stub_section = add_stub_section; + htab->layout_sections_again = layout_sections_again; + stubs_always_before_branch = group_size < 0; + if (group_size < 0) + stub_group_size = -group_size; + else + stub_group_size = group_size; + if (stub_group_size == 1) + { + /* Default values. */ + if (stubs_always_before_branch) + { + stub_group_size = 0x1e00000; + if (htab->has_14bit_branch) + stub_group_size = 0x7800; + } + else + { + stub_group_size = 0x1c00000; + if (htab->has_14bit_branch) + stub_group_size = 0x7000; + } + } + + group_sections (htab, stub_group_size, stubs_always_before_branch); + + while (1) + { + bfd *input_bfd; + unsigned int bfd_indx; + asection *stub_sec; + bfd_boolean stub_changed; + + htab->stub_iteration += 1; + stub_changed = FALSE; + + for (input_bfd = info->input_bfds, bfd_indx = 0; + input_bfd != NULL; + input_bfd = input_bfd->link_next, bfd_indx++) + { + Elf_Internal_Shdr *symtab_hdr; + asection *section; + Elf_Internal_Sym *local_syms = NULL; + + /* We'll need the symbol table in a second. */ + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + if (symtab_hdr->sh_info == 0) + continue; + + /* Walk over each section attached to the input bfd. */ + for (section = input_bfd->sections; + section != NULL; + section = section->next) + { + Elf_Internal_Rela *internal_relocs, *irelaend, *irela; + + /* If there aren't any relocs, then there's nothing more + to do. */ + if ((section->flags & SEC_RELOC) == 0 + || section->reloc_count == 0) + continue; + + /* If this section is a link-once section that will be + discarded, then don't create any stubs. */ + if (section->output_section == NULL + || section->output_section->owner != output_bfd) + continue; + + /* Get the relocs. */ + internal_relocs + = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, + info->keep_memory); + if (internal_relocs == NULL) + goto error_ret_free_local; + + /* Now examine each relocation. */ + irela = internal_relocs; + irelaend = irela + section->reloc_count; + for (; irela < irelaend; irela++) + { + enum elf_ppc64_reloc_type r_type; + unsigned int r_indx; + enum ppc_stub_type stub_type; + struct ppc_stub_hash_entry *stub_entry; + asection *sym_sec; + bfd_vma sym_value; + bfd_vma destination; + struct ppc_link_hash_entry *hash; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; + char *stub_name; + const asection *id_sec; + + r_type = ELF64_R_TYPE (irela->r_info); + r_indx = ELF64_R_SYM (irela->r_info); + + if (r_type >= R_PPC64_max) + { + bfd_set_error (bfd_error_bad_value); + goto error_ret_free_internal; + } + + /* Only look for stubs on branch instructions. */ + if (r_type != R_PPC64_REL24 + && r_type != R_PPC64_REL14 + && r_type != R_PPC64_REL14_BRTAKEN + && r_type != R_PPC64_REL14_BRNTAKEN) + continue; + + /* Now determine the call target, its name, value, + section. */ + destination = 0; + if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, + r_indx, input_bfd)) + goto error_ret_free_internal; + hash = (struct ppc_link_hash_entry *) h; + + if (hash == NULL) + { + /* It's a local symbol. */ + sym_value = sym->st_value; + destination = (sym_value + irela->r_addend + + sym_sec->output_offset + + sym_sec->output_section->vma); + } + else + { + /* It's an external symbol. */ + sym_value = 0; + if (hash->elf.root.type == bfd_link_hash_defined + || hash->elf.root.type == bfd_link_hash_defweak) + { + sym_value = hash->elf.root.u.def.value; + if (sym_sec->output_section != NULL) + destination = (sym_value + irela->r_addend + + sym_sec->output_offset + + sym_sec->output_section->vma); + } + else if (hash->elf.root.type == bfd_link_hash_undefweak) + ; + else if (hash->elf.root.type == bfd_link_hash_undefined) + ; + else + { + bfd_set_error (bfd_error_bad_value); + goto error_ret_free_internal; + } + } + + /* Determine what (if any) linker stub is needed. */ + stub_type = ppc_type_of_stub (section, irela, &hash, + destination); + + if (stub_type != ppc_stub_plt_call) + { + /* Check whether we need a TOC adjusting stub. + Since the linker pastes together pieces from + different object files when creating the + _init and _fini functions, it may be that a + call to what looks like a local sym is in + fact a call needing a TOC adjustment. */ + if (sym_sec != NULL + && sym_sec->output_section != NULL + && (htab->stub_group[sym_sec->id].toc_off + != htab->stub_group[section->id].toc_off) + && sym_sec->has_gp_reloc + && section->has_gp_reloc) + stub_type = ppc_stub_long_branch_r2off; + } + + if (stub_type == ppc_stub_none) + continue; + + /* __tls_get_addr calls might be eliminated. */ + if (stub_type != ppc_stub_plt_call + && hash != NULL + && &hash->elf == htab->tls_get_addr + && section->has_tls_reloc + && irela != internal_relocs) + { + /* Get tls info. */ + char *tls_mask; + + if (!get_tls_mask (&tls_mask, NULL, &local_syms, + irela - 1, input_bfd)) + goto error_ret_free_internal; + if (*tls_mask != 0) + continue; + } + + /* Support for grouping stub sections. */ + id_sec = htab->stub_group[section->id].link_sec; + + /* Get the name of this stub. */ + stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); + if (!stub_name) + goto error_ret_free_internal; + + stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, + stub_name, FALSE, FALSE); + if (stub_entry != NULL) + { + /* The proper stub has already been created. */ + free (stub_name); + continue; + } + + stub_entry = ppc_add_stub (stub_name, section, htab); + if (stub_entry == NULL) + { + free (stub_name); + error_ret_free_internal: + if (elf_section_data (section)->relocs == NULL) + free (internal_relocs); + error_ret_free_local: + if (local_syms != NULL + && (symtab_hdr->contents + != (unsigned char *) local_syms)) + free (local_syms); + return FALSE; + } + + stub_entry->stub_type = stub_type; + stub_entry->target_value = sym_value; + stub_entry->target_section = sym_sec; + stub_entry->h = hash; + stub_entry->addend = irela->r_addend; + stub_changed = TRUE; + } + + /* We're done with the internal relocs, free them. */ + if (elf_section_data (section)->relocs != internal_relocs) + free (internal_relocs); + } + + if (local_syms != NULL + && symtab_hdr->contents != (unsigned char *) local_syms) + { + if (!info->keep_memory) + free (local_syms); + else + symtab_hdr->contents = (unsigned char *) local_syms; + } + } + + if (!stub_changed) + break; + + /* OK, we've added some stubs. Find out the new size of the + stub sections. */ + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + { + stub_sec->_raw_size = 0; + stub_sec->_cooked_size = 0; + } + htab->brlt->_raw_size = 0; + htab->brlt->_cooked_size = 0; + if (info->shared) + { + htab->relbrlt->_raw_size = 0; + htab->relbrlt->_cooked_size = 0; + } + + bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); + + /* Ask the linker to do its stuff. */ + (*htab->layout_sections_again) (); + } + + /* It would be nice to strip .branch_lt from the output if the + section is empty, but it's too late. If we strip sections here, + the dynamic symbol table is corrupted since the section symbol + for the stripped section isn't written. */ + + return TRUE; +} + +/* Called after we have determined section placement. If sections + move, we'll be called again. Provide a value for TOCstart. */ + +bfd_vma +ppc64_elf_toc (bfd *obfd) +{ + asection *s; + bfd_vma TOCstart; + + /* The TOC consists of sections .got, .toc, .tocbss, .plt in that + order. The TOC starts where the first of these sections starts. */ + s = bfd_get_section_by_name (obfd, ".got"); + if (s == NULL) + s = bfd_get_section_by_name (obfd, ".toc"); + if (s == NULL) + s = bfd_get_section_by_name (obfd, ".tocbss"); + if (s == NULL) + s = bfd_get_section_by_name (obfd, ".plt"); + if (s == NULL) + { + /* This may happen for + o references to TOC base (SYM@toc / TOC[tc0]) without a + .toc directive + o bad linker script + o --gc-sections and empty TOC sections + + FIXME: Warn user? */ + + /* Look for a likely section. We probably won't even be + using TOCstart. */ + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY)) + == (SEC_ALLOC | SEC_SMALL_DATA)) + break; + if (s == NULL) + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA)) + == (SEC_ALLOC | SEC_SMALL_DATA)) + break; + if (s == NULL) + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) + break; + if (s == NULL) + for (s = obfd->sections; s != NULL; s = s->next) + if ((s->flags & SEC_ALLOC) == SEC_ALLOC) + break; + } + + TOCstart = 0; + if (s != NULL) + TOCstart = s->output_section->vma + s->output_offset; + + return TOCstart; +} + +/* Build all the stubs associated with the current output file. + The stubs are kept in a hash table attached to the main linker + hash table. This function is called via gldelf64ppc_finish. */ + +bfd_boolean +ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, + struct bfd_link_info *info, + char **stats) +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + asection *stub_sec; + bfd_byte *p; + int stub_sec_count = 0; + + htab->emit_stub_syms = emit_stub_syms; + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + { + bfd_size_type size; + + /* Allocate memory to hold the linker stubs. */ + size = stub_sec->_raw_size; + if (size != 0) + { + stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); + if (stub_sec->contents == NULL) + return FALSE; + } + stub_sec->_cooked_size = 0; + } + + if (htab->plt != NULL) + { + unsigned int indx; + bfd_vma plt0; + + /* Build the .glink plt call stub. */ + plt0 = (htab->plt->output_section->vma + + htab->plt->output_offset + - (htab->glink->output_section->vma + + htab->glink->output_offset + + GLINK_CALL_STUB_SIZE)); + if (plt0 + 0x80008000 > 0xffffffff) + { + (*_bfd_error_handler) (_(".glink and .plt too far apart")); + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + + if (htab->emit_stub_syms) + { + struct elf_link_hash_entry *h; + h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE); + if (h == NULL) + return FALSE; + if (h->root.type == bfd_link_hash_new) + { + h->root.type = bfd_link_hash_defined; + h->root.u.def.section = htab->glink; + h->root.u.def.value = 0; + h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR + | ELF_LINK_HASH_DEF_REGULAR + | ELF_LINK_HASH_REF_REGULAR_NONWEAK + | ELF_LINK_FORCED_LOCAL); + } + } + p = htab->glink->contents; + bfd_put_32 (htab->glink->owner, MFCTR_R12, p); + p += 4; + bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p); + p += 4; + bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p); + p += 4; + bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p); + p += 4; + bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p); + p += 4; + bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p); + p += 4; + bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p); + p += 4; + bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p); + p += 4; + bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p); + p += 4; + bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p); + p += 4; + bfd_put_32 (htab->glink->owner, MTCTR_R11, p); + p += 4; + bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p); + p += 4; + bfd_put_32 (htab->glink->owner, BCTR, p); + p += 4; + + /* Build the .glink lazy link call stubs. */ + indx = 0; + while (p < htab->glink->contents + htab->glink->_raw_size) + { + if (indx < 0x8000) + { + bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); + p += 4; + } + else + { + bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); + p += 4; + bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); + p += 4; + } + bfd_put_32 (htab->glink->owner, + B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p); + indx++; + p += 4; + } + htab->glink->_cooked_size = p - htab->glink->contents; + } + + if (htab->brlt->_raw_size != 0) + { + htab->brlt->contents = bfd_zalloc (htab->brlt->owner, + htab->brlt->_raw_size); + if (htab->brlt->contents == NULL) + return FALSE; + } + if (info->shared && htab->relbrlt->_raw_size != 0) + { + htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, + htab->relbrlt->_raw_size); + if (htab->relbrlt->contents == NULL) + return FALSE; + } + + /* Build the stubs as directed by the stub hash table. */ + bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); + + for (stub_sec = htab->stub_bfd->sections; + stub_sec != NULL; + stub_sec = stub_sec->next) + if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) + { + stub_sec_count += 1; + if (stub_sec->_raw_size != stub_sec->_cooked_size) + break; + } + + if (stub_sec != NULL + || htab->glink->_raw_size != htab->glink->_cooked_size) + { + htab->stub_error = TRUE; + (*_bfd_error_handler) (_("stubs don't match calculated size")); + } + + if (htab->stub_error) + return FALSE; + + if (stats != NULL) + { + *stats = bfd_malloc (500); + if (*stats == NULL) + return FALSE; + + sprintf (*stats, _("linker stubs in %u groups\n" + " branch %lu\n" + " toc adjust %lu\n" + " long branch %lu\n" + " long toc adj %lu\n" + " plt call %lu"), + stub_sec_count, + htab->stub_count[ppc_stub_long_branch - 1], + htab->stub_count[ppc_stub_long_branch_r2off - 1], + htab->stub_count[ppc_stub_plt_branch - 1], + htab->stub_count[ppc_stub_plt_branch_r2off - 1], + htab->stub_count[ppc_stub_plt_call - 1]); + } + return TRUE; +} + +/* The RELOCATE_SECTION function is called by the ELF backend linker + to handle the relocations for a section. + + The relocs are always passed as Rela structures; if the section + actually uses Rel structures, the r_addend field will always be + zero. + + This function is responsible for adjust the section contents as + necessary, and (if using Rela relocs and generating a + relocatable output file) adjusting the reloc addend as + necessary. + + This function does not have to worry about setting the reloc + address or the reloc symbol index. + + LOCAL_SYMS is a pointer to the swapped in local symbols. + + LOCAL_SECTIONS is an array giving the section in the input file + corresponding to the st_shndx field of each local symbol. + + The global hash table entry for the global symbols can be found + via elf_sym_hashes (input_bfd). + + When generating relocatable output, this function must handle + STB_LOCAL/STT_SECTION symbols specially. The output symbol is + going to be the section symbol corresponding to the output + section, which means that the addend must be adjusted + accordingly. */ + +static bfd_boolean +ppc64_elf_relocate_section (bfd *output_bfd, + struct bfd_link_info *info, + bfd *input_bfd, + asection *input_section, + bfd_byte *contents, + Elf_Internal_Rela *relocs, + Elf_Internal_Sym *local_syms, + asection **local_sections) +{ + struct ppc_link_hash_table *htab; + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + Elf_Internal_Rela outrel; + bfd_byte *loc; + struct got_entry **local_got_ents; + bfd_vma TOCstart; + bfd_boolean ret = TRUE; + bfd_boolean is_opd; + /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ + bfd_boolean is_power4 = FALSE; + + if (info->relocatable) + return TRUE; + + /* Initialize howto table if needed. */ + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + ppc_howto_init (); + + htab = ppc_hash_table (info); + local_got_ents = elf_local_got_ents (input_bfd); + TOCstart = elf_gp (output_bfd); + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL; + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + enum elf_ppc64_reloc_type r_type; + bfd_vma addend; + bfd_reloc_status_type r; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h; + struct elf_link_hash_entry *fdh; + const char *sym_name; + unsigned long r_symndx, toc_symndx; + char tls_mask, tls_gd, tls_type; + char sym_type; + bfd_vma relocation; + bfd_boolean unresolved_reloc; + bfd_boolean warned; + unsigned long insn, mask; + struct ppc_stub_hash_entry *stub_entry; + bfd_vma max_br_offset; + bfd_vma from; + + r_type = ELF64_R_TYPE (rel->r_info); + r_symndx = ELF64_R_SYM (rel->r_info); + + /* For old style R_PPC64_TOC relocs with a zero symbol, use the + symbol of the previous ADDR64 reloc. The symbol gives us the + proper TOC base to use. */ + if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) + && rel != relocs + && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64 + && is_opd) + r_symndx = ELF64_R_SYM (rel[-1].r_info); + + sym = NULL; + sec = NULL; + h = NULL; + sym_name = NULL; + unresolved_reloc = FALSE; + warned = FALSE; + + if (r_symndx < symtab_hdr->sh_info) + { + /* It's a local symbol. */ + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + sym_name = bfd_elf_local_sym_name (input_bfd, sym); + sym_type = ELF64_ST_TYPE (sym->st_info); + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); + if (elf_section_data (sec) != NULL) + { + long *opd_sym_adjust; + + opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust; + if (opd_sym_adjust != NULL) + relocation += opd_sym_adjust[sym->st_value / 24]; + } + } + else + { + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned); + sym_name = h->root.root.string; + sym_type = h->type; + } + + /* TLS optimizations. Replace instruction sequences and relocs + based on information we collected in tls_optimize. We edit + RELOCS so that --emit-relocs will output something sensible + for the final instruction stream. */ + tls_mask = 0; + tls_gd = 0; + toc_symndx = 0; + if (IS_PPC64_TLS_RELOC (r_type)) + { + if (h != NULL) + tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask; + else if (local_got_ents != NULL) + { + char *lgot_masks; + lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info); + tls_mask = lgot_masks[r_symndx]; + } + if (tls_mask == 0 && r_type == R_PPC64_TLS) + { + /* Check for toc tls entries. */ + char *toc_tls; + + if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms, + rel, input_bfd)) + return FALSE; + + if (toc_tls) + tls_mask = *toc_tls; + } + } + + /* Check that tls relocs are used with tls syms, and non-tls + relocs are used with non-tls syms. */ + if (r_symndx != 0 + && r_type != R_PPC64_NONE + && (h == NULL + || h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS)) + { + if (r_type == R_PPC64_TLS && tls_mask != 0) + /* R_PPC64_TLS is OK against a symbol in the TOC. */ + ; + else + (*_bfd_error_handler) + (sym_type == STT_TLS + ? _("%s(%s+0x%lx): %s used with TLS symbol %s") + : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"), + bfd_archive_filename (input_bfd), + input_section->name, + (long) rel->r_offset, + ppc64_elf_howto_table[r_type]->name, + sym_name); + } + + /* Ensure reloc mapping code below stays sane. */ + if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 + || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 + || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) + || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) + || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) + || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) + || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) + || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) + || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) + || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) + abort (); + + switch (r_type) + { + default: + break; + + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + { + /* Check for toc tls entries. */ + char *toc_tls; + int retval; + + retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms, + rel, input_bfd); + if (retval == 0) + return FALSE; + + if (toc_tls) + { + tls_mask = *toc_tls; + if (r_type == R_PPC64_TOC16_DS + || r_type == R_PPC64_TOC16_LO_DS) + { + if (tls_mask != 0 + && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) + goto toctprel; + } + else + { + /* If we found a GD reloc pair, then we might be + doing a GD->IE transition. */ + if (retval == 2) + { + tls_gd = TLS_TPRELGD; + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + goto tls_get_addr_check; + } + else if (retval == 3) + { + if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) + goto tls_get_addr_check; + } + } + } + } + break; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + if (tls_mask != 0 + && (tls_mask & TLS_TPREL) == 0) + { + toctprel: + insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2); + insn &= 31 << 21; + insn |= 0x3c0d0000; /* addis 0,13,0 */ + bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2); + r_type = R_PPC64_TPREL16_HA; + if (toc_symndx != 0) + { + rel->r_info = ELF64_R_INFO (toc_symndx, r_type); + /* We changed the symbol. Start over in order to + get h, sym, sec etc. right. */ + rel--; + continue; + } + else + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + + case R_PPC64_TLS: + if (tls_mask != 0 + && (tls_mask & TLS_TPREL) == 0) + { + bfd_vma rtra; + insn = bfd_get_32 (output_bfd, contents + rel->r_offset); + if ((insn & ((0x3f << 26) | (31 << 11))) + == ((31 << 26) | (13 << 11))) + rtra = insn & ((1 << 26) - (1 << 16)); + else if ((insn & ((0x3f << 26) | (31 << 16))) + == ((31 << 26) | (13 << 16))) + rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); + else + abort (); + if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) + /* add -> addi. */ + insn = 14 << 26; + else if ((insn & (31 << 1)) == 23 << 1 + && ((insn & (31 << 6)) < 14 << 6 + || ((insn & (31 << 6)) >= 16 << 6 + && (insn & (31 << 6)) < 24 << 6))) + /* load and store indexed -> dform. */ + insn = (32 | ((insn >> 6) & 31)) << 26; + else if ((insn & (31 << 1)) == 21 << 1 + && (insn & (0x1a << 6)) == 0) + /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ + insn = (((58 | ((insn >> 6) & 4)) << 26) + | ((insn >> 6) & 1)); + else if ((insn & (31 << 1)) == 21 << 1 + && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) + /* lwax -> lwa. */ + insn = (58 << 26) | 2; + else + abort (); + insn |= rtra; + bfd_put_32 (output_bfd, insn, contents + rel->r_offset); + /* Was PPC64_TLS which sits on insn boundary, now + PPC64_TPREL16_LO which is at insn+2. */ + rel->r_offset += 2; + r_type = R_PPC64_TPREL16_LO; + if (toc_symndx != 0) + { + rel->r_info = ELF64_R_INFO (toc_symndx, r_type); + /* We changed the symbol. Start over in order to + get h, sym, sec etc. right. */ + rel--; + continue; + } + else + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_gd = TLS_TPRELGD; + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + goto tls_gdld_hi; + break; + + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) + { + tls_gdld_hi: + if ((tls_mask & tls_gd) != 0) + r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) + + R_PPC64_GOT_TPREL16_DS); + else + { + bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); + rel->r_offset -= 2; + r_type = R_PPC64_NONE; + } + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + tls_gd = TLS_TPRELGD; + if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) + goto tls_get_addr_check; + break; + + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) + { + tls_get_addr_check: + if (rel + 1 < relend) + { + enum elf_ppc64_reloc_type r_type2; + unsigned long r_symndx2; + struct elf_link_hash_entry *h2; + bfd_vma insn1, insn2, insn3; + bfd_vma offset; + + /* The next instruction should be a call to + __tls_get_addr. Peek at the reloc to be sure. */ + r_type2 = ELF64_R_TYPE (rel[1].r_info); + r_symndx2 = ELF64_R_SYM (rel[1].r_info); + if (r_symndx2 < symtab_hdr->sh_info + || (r_type2 != R_PPC64_REL14 + && r_type2 != R_PPC64_REL14_BRTAKEN + && r_type2 != R_PPC64_REL14_BRNTAKEN + && r_type2 != R_PPC64_REL24)) + break; + + h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; + while (h2->root.type == bfd_link_hash_indirect + || h2->root.type == bfd_link_hash_warning) + h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; + if (h2 == NULL || h2 != htab->tls_get_addr) + break; + + /* OK, it checks out. Replace the call. */ + offset = rel[1].r_offset; + insn1 = bfd_get_32 (output_bfd, + contents + rel->r_offset - 2); + insn3 = bfd_get_32 (output_bfd, + contents + offset + 4); + if ((tls_mask & tls_gd) != 0) + { + /* IE */ + insn1 &= (1 << 26) - (1 << 2); + insn1 |= 58 << 26; /* ld */ + insn2 = 0x7c636a14; /* add 3,3,13 */ + rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE); + if ((tls_mask & TLS_EXPLICIT) == 0) + r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) + + R_PPC64_GOT_TPREL16_DS); + else + r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + else + { + /* LE */ + insn1 = 0x3c6d0000; /* addis 3,13,0 */ + insn2 = 0x38630000; /* addi 3,3,0 */ + if (tls_gd == 0) + { + /* Was an LD reloc. */ + r_symndx = 0; + rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; + rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; + } + else if (toc_symndx != 0) + r_symndx = toc_symndx; + r_type = R_PPC64_TPREL16_HA; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + rel[1].r_info = ELF64_R_INFO (r_symndx, + R_PPC64_TPREL16_LO); + rel[1].r_offset += 2; + } + if (insn3 == NOP + || insn3 == CROR_151515 || insn3 == CROR_313131) + { + insn3 = insn2; + insn2 = NOP; + rel[1].r_offset += 4; + } + bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2); + bfd_put_32 (output_bfd, insn2, contents + offset); + bfd_put_32 (output_bfd, insn3, contents + offset + 4); + if (tls_gd == 0 || toc_symndx != 0) + { + /* We changed the symbol. Start over in order + to get h, sym, sec etc. right. */ + rel--; + continue; + } + } + } + break; + + case R_PPC64_DTPMOD64: + if (rel + 1 < relend + && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) + && rel[1].r_offset == rel->r_offset + 8) + { + if ((tls_mask & TLS_GD) == 0) + { + rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); + if ((tls_mask & TLS_TPRELGD) != 0) + r_type = R_PPC64_TPREL64; + else + { + bfd_put_64 (output_bfd, 1, contents + rel->r_offset); + r_type = R_PPC64_NONE; + } + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + } + else + { + if ((tls_mask & TLS_LD) == 0) + { + bfd_put_64 (output_bfd, 1, contents + rel->r_offset); + r_type = R_PPC64_NONE; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + } + break; + + case R_PPC64_TPREL64: + if ((tls_mask & TLS_TPREL) == 0) + { + r_type = R_PPC64_NONE; + rel->r_info = ELF64_R_INFO (r_symndx, r_type); + } + break; + } + + /* Handle other relocations that tweak non-addend part of insn. */ + insn = 0; + switch (r_type) + { + default: + break; + + /* Branch taken prediction relocations. */ + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_REL14_BRTAKEN: + insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ + /* Fall thru. */ + + /* Branch not taken prediction relocations. */ + case R_PPC64_ADDR14_BRNTAKEN: + case R_PPC64_REL14_BRNTAKEN: + insn |= bfd_get_32 (output_bfd, + contents + rel->r_offset) & ~(0x01 << 21); + if (is_power4) + { + /* Set 'a' bit. This is 0b00010 in BO field for branch + on CR(BI) insns (BO == 001at or 011at), and 0b01000 + for branch on CTR insns (BO == 1a00t or 1a01t). */ + if ((insn & (0x14 << 21)) == (0x04 << 21)) + insn |= 0x02 << 21; + else if ((insn & (0x14 << 21)) == (0x10 << 21)) + insn |= 0x08 << 21; + else + break; + } + else + { + from = (rel->r_offset + + input_section->output_offset + + input_section->output_section->vma); + + /* Invert 'y' bit if not the default. */ + if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) + insn ^= 0x01 << 21; + } + + bfd_put_32 (output_bfd, insn, contents + rel->r_offset); + break; + + case R_PPC64_REL24: + /* Calls to functions with a different TOC, such as calls to + shared objects, need to alter the TOC pointer. This is + done using a linkage stub. A REL24 branching to these + linkage stubs needs to be followed by a nop, as the nop + will be replaced with an instruction to restore the TOC + base pointer. */ + if (((h != NULL + && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL + && fdh->plt.plist != NULL) + || ((fdh = h, sec) != NULL + && sec->output_section != NULL + && (htab->stub_group[sec->id].toc_off + != htab->stub_group[input_section->id].toc_off))) + && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh, + rel, htab)) != NULL + && (stub_entry->stub_type == ppc_stub_plt_call + || stub_entry->stub_type == ppc_stub_plt_branch_r2off + || stub_entry->stub_type == ppc_stub_long_branch_r2off)) + { + bfd_boolean can_plt_call = 0; + + if (rel->r_offset + 8 <= input_section->_cooked_size) + { + insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); + if (insn == NOP + || insn == CROR_151515 || insn == CROR_313131) + { + bfd_put_32 (input_bfd, LD_R2_40R1, + contents + rel->r_offset + 4); + can_plt_call = 1; + } + } + + if (!can_plt_call) + { + if (stub_entry->stub_type == ppc_stub_plt_call) + { + /* If this is a plain branch rather than a branch + and link, don't require a nop. */ + insn = bfd_get_32 (input_bfd, contents + rel->r_offset); + if ((insn & 1) == 0) + can_plt_call = 1; + } + else if (h != NULL + && strcmp (h->root.root.string, + ".__libc_start_main") == 0) + { + /* Allow crt1 branch to go via a toc adjusting stub. */ + can_plt_call = 1; + } + else + { + if (strcmp (input_section->output_section->name, + ".init") == 0 + || strcmp (input_section->output_section->name, + ".fini") == 0) + (*_bfd_error_handler) + (_("%s(%s+0x%lx): automatic multiple TOCs " + "not supported using your crt files; " + "recompile with -mminimal-toc or upgrade gcc"), + bfd_archive_filename (input_bfd), + input_section->name, + (long) rel->r_offset); + else + (*_bfd_error_handler) + (_("%s(%s+0x%lx): sibling call optimization to `%s' " + "does not allow automatic multiple TOCs; " + "recompile with -mminimal-toc or " + "-fno-optimize-sibling-calls, " + "or make `%s' extern"), + bfd_archive_filename (input_bfd), + input_section->name, + (long) rel->r_offset, + sym_name, + sym_name); + bfd_set_error (bfd_error_bad_value); + ret = FALSE; + } + } + + if (can_plt_call) + { + relocation = (stub_entry->stub_offset + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + if (stub_entry->stub_type == ppc_stub_plt_call) + unresolved_reloc = FALSE; + } + } + + if (h != NULL + && h->root.type == bfd_link_hash_undefweak + && relocation == 0 + && rel->r_addend == 0) + { + /* Tweak calls to undefined weak functions to point at a + blr. We can thus call a weak function without first + checking whether the function is defined. We have a + blr at the end of .sfpr. */ + BFD_ASSERT (htab->sfpr->_raw_size != 0); + relocation = (htab->sfpr->_raw_size - 4 + + htab->sfpr->output_offset + + htab->sfpr->output_section->vma); + from = (rel->r_offset + + input_section->output_offset + + input_section->output_section->vma); + + /* But let's not be silly about it. If the blr isn't in + reach, just go to the next instruction. */ + if (relocation - from + (1 << 25) >= (1 << 26) + || htab->sfpr->_raw_size == 0) + relocation = from + 4; + } + break; + } + + /* Set `addend'. */ + tls_type = 0; + addend = rel->r_addend; + switch (r_type) + { + default: + (*_bfd_error_handler) + (_("%s: unknown relocation type %d for symbol %s"), + bfd_archive_filename (input_bfd), (int) r_type, sym_name); + + bfd_set_error (bfd_error_bad_value); + ret = FALSE; + continue; + + case R_PPC64_NONE: + case R_PPC64_TLS: + case R_PPC64_GNU_VTINHERIT: + case R_PPC64_GNU_VTENTRY: + continue; + + /* GOT16 relocations. Like an ADDR16 using the symbol's + address in the GOT as relocation value instead of the + symbol's value itself. Also, create a GOT entry for the + symbol and put the symbol value there. */ + case R_PPC64_GOT_TLSGD16: + case R_PPC64_GOT_TLSGD16_LO: + case R_PPC64_GOT_TLSGD16_HI: + case R_PPC64_GOT_TLSGD16_HA: + tls_type = TLS_TLS | TLS_GD; + goto dogot; + + case R_PPC64_GOT_TLSLD16: + case R_PPC64_GOT_TLSLD16_LO: + case R_PPC64_GOT_TLSLD16_HI: + case R_PPC64_GOT_TLSLD16_HA: + tls_type = TLS_TLS | TLS_LD; + goto dogot; + + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_TPREL16_HI: + case R_PPC64_GOT_TPREL16_HA: + tls_type = TLS_TLS | TLS_TPREL; + goto dogot; + + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_HI: + case R_PPC64_GOT_DTPREL16_HA: + tls_type = TLS_TLS | TLS_DTPREL; + goto dogot; + + case R_PPC64_GOT16: + case R_PPC64_GOT16_LO: + case R_PPC64_GOT16_HI: + case R_PPC64_GOT16_HA: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_LO_DS: + dogot: + { + /* Relocation is to the entry for this symbol in the global + offset table. */ + asection *got; + bfd_vma *offp; + bfd_vma off; + unsigned long indx = 0; + + if (tls_type == (TLS_TLS | TLS_LD) + && (h == NULL + || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) + offp = &ppc64_tlsld_got (input_bfd)->offset; + else + { + struct got_entry *ent; + + if (h != NULL) + { + bfd_boolean dyn = htab->elf.dynamic_sections_created; + if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) + || (info->shared + && SYMBOL_REFERENCES_LOCAL (info, h))) + /* This is actually a static link, or it is a + -Bsymbolic link and the symbol is defined + locally, or the symbol was forced to be local + because of a version file. */ + ; + else + { + indx = h->dynindx; + unresolved_reloc = FALSE; + } + ent = h->got.glist; + } + else + { + if (local_got_ents == NULL) + abort (); + ent = local_got_ents[r_symndx]; + } + + for (; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->owner == input_bfd + && ent->tls_type == tls_type) + break; + if (ent == NULL) + abort (); + offp = &ent->got.offset; + } + + got = ppc64_elf_tdata (input_bfd)->got; + if (got == NULL) + abort (); + + /* The offset must always be a multiple of 8. We use the + least significant bit to record whether we have already + processed this entry. */ + off = *offp; + if ((off & 1) != 0) + off &= ~1; + else + { + /* Generate relocs for the dynamic linker, except in + the case of TLSLD where we'll use one entry per + module. */ + asection *relgot = ppc64_elf_tdata (input_bfd)->relgot; + + *offp = off | 1; + if ((info->shared || indx != 0) + && (h == NULL + || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak)) + { + outrel.r_offset = (got->output_section->vma + + got->output_offset + + off); + outrel.r_addend = rel->r_addend; + if (tls_type & (TLS_LD | TLS_GD)) + { + outrel.r_addend = 0; + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); + if (tls_type == (TLS_TLS | TLS_GD)) + { + loc = relgot->contents; + loc += (relgot->reloc_count++ + * sizeof (Elf64_External_Rela)); + bfd_elf64_swap_reloca_out (output_bfd, + &outrel, loc); + outrel.r_offset += 8; + outrel.r_addend = rel->r_addend; + outrel.r_info + = ELF64_R_INFO (indx, R_PPC64_DTPREL64); + } + } + else if (tls_type == (TLS_TLS | TLS_DTPREL)) + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); + else if (tls_type == (TLS_TLS | TLS_TPREL)) + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); + else if (indx == 0) + { + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE); + + /* Write the .got section contents for the sake + of prelink. */ + loc = got->contents + off; + bfd_put_64 (output_bfd, outrel.r_addend + relocation, + loc); + } + else + outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); + + if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) + { + outrel.r_addend += relocation; + if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) + outrel.r_addend -= htab->elf.tls_sec->vma; + } + loc = relgot->contents; + loc += (relgot->reloc_count++ + * sizeof (Elf64_External_Rela)); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + } + + /* Init the .got section contents here if we're not + emitting a reloc. */ + else + { + relocation += rel->r_addend; + if (tls_type == (TLS_TLS | TLS_LD)) + relocation = 1; + else if (tls_type != 0) + { + relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; + if (tls_type == (TLS_TLS | TLS_TPREL)) + relocation += DTP_OFFSET - TP_OFFSET; + + if (tls_type == (TLS_TLS | TLS_GD)) + { + bfd_put_64 (output_bfd, relocation, + got->contents + off + 8); + relocation = 1; + } + } + + bfd_put_64 (output_bfd, relocation, + got->contents + off); + } + } + + if (off >= (bfd_vma) -2) + abort (); + + relocation = got->output_offset + off; + + /* TOC base (r2) is TOC start plus 0x8000. */ + addend = -TOC_BASE_OFF; + } + break; + + case R_PPC64_PLT16_HA: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT32: + case R_PPC64_PLT64: + /* Relocation is to the entry for this symbol in the + procedure linkage table. */ + + /* Resolve a PLT reloc against a local symbol directly, + without using the procedure linkage table. */ + if (h == NULL) + break; + + /* It's possible that we didn't make a PLT entry for this + symbol. This happens when statically linking PIC code, + or when using -Bsymbolic. Go find a match if there is a + PLT entry. */ + if (htab->plt != NULL) + { + struct plt_entry *ent; + for (ent = h->plt.plist; ent != NULL; ent = ent->next) + if (ent->addend == rel->r_addend + && ent->plt.offset != (bfd_vma) -1) + { + relocation = (htab->plt->output_section->vma + + htab->plt->output_offset + + ent->plt.offset); + unresolved_reloc = FALSE; + } + } + break; + + case R_PPC64_TOC: + /* Relocation value is TOC base. */ + relocation = TOCstart; + if (r_symndx == 0) + relocation += htab->stub_group[input_section->id].toc_off; + else if (unresolved_reloc) + ; + else if (sec != NULL && sec->id <= htab->top_id) + relocation += htab->stub_group[sec->id].toc_off; + else + unresolved_reloc = TRUE; + goto dodyn2; + + /* TOC16 relocs. We want the offset relative to the TOC base, + which is the address of the start of the TOC plus 0x8000. + The TOC consists of sections .got, .toc, .tocbss, and .plt, + in this order. */ + case R_PPC64_TOC16: + case R_PPC64_TOC16_LO: + case R_PPC64_TOC16_HI: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + case R_PPC64_TOC16_HA: + addend -= TOCstart + htab->stub_group[input_section->id].toc_off; + break; + + /* Relocate against the beginning of the section. */ + case R_PPC64_SECTOFF: + case R_PPC64_SECTOFF_LO: + case R_PPC64_SECTOFF_HI: + case R_PPC64_SECTOFF_DS: + case R_PPC64_SECTOFF_LO_DS: + case R_PPC64_SECTOFF_HA: + if (sec != NULL) + addend -= sec->output_section->vma; + break; + + case R_PPC64_REL14: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL24: + break; + + case R_PPC64_TPREL16: + case R_PPC64_TPREL16_LO: + case R_PPC64_TPREL16_HI: + case R_PPC64_TPREL16_HA: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + addend -= htab->elf.tls_sec->vma + TP_OFFSET; + if (info->shared) + /* The TPREL16 relocs shouldn't really be used in shared + libs as they will result in DT_TEXTREL being set, but + support them anyway. */ + goto dodyn; + break; + + case R_PPC64_DTPREL16: + case R_PPC64_DTPREL16_LO: + case R_PPC64_DTPREL16_HI: + case R_PPC64_DTPREL16_HA: + case R_PPC64_DTPREL16_DS: + case R_PPC64_DTPREL16_LO_DS: + case R_PPC64_DTPREL16_HIGHER: + case R_PPC64_DTPREL16_HIGHERA: + case R_PPC64_DTPREL16_HIGHEST: + case R_PPC64_DTPREL16_HIGHESTA: + addend -= htab->elf.tls_sec->vma + DTP_OFFSET; + break; + + case R_PPC64_DTPMOD64: + relocation = 1; + addend = 0; + goto dodyn; + + case R_PPC64_TPREL64: + addend -= htab->elf.tls_sec->vma + TP_OFFSET; + goto dodyn; + + case R_PPC64_DTPREL64: + addend -= htab->elf.tls_sec->vma + DTP_OFFSET; + /* Fall thru */ + + /* Relocations that may need to be propagated if this is a + dynamic object. */ + case R_PPC64_REL30: + case R_PPC64_REL32: + case R_PPC64_REL64: + case R_PPC64_ADDR14: + case R_PPC64_ADDR14_BRNTAKEN: + case R_PPC64_ADDR14_BRTAKEN: + case R_PPC64_ADDR16: + case R_PPC64_ADDR16_DS: + case R_PPC64_ADDR16_HA: + case R_PPC64_ADDR16_HI: + case R_PPC64_ADDR16_HIGHER: + case R_PPC64_ADDR16_HIGHERA: + case R_PPC64_ADDR16_HIGHEST: + case R_PPC64_ADDR16_HIGHESTA: + case R_PPC64_ADDR16_LO: + case R_PPC64_ADDR16_LO_DS: + case R_PPC64_ADDR24: + case R_PPC64_ADDR32: + case R_PPC64_ADDR64: + case R_PPC64_UADDR16: + case R_PPC64_UADDR32: + case R_PPC64_UADDR64: + /* r_symndx will be zero only for relocs against symbols + from removed linkonce sections, or sections discarded by + a linker script. */ + dodyn: + if (r_symndx == 0) + break; + /* Fall thru. */ + + dodyn2: + if ((input_section->flags & SEC_ALLOC) == 0) + break; + + if (NO_OPD_RELOCS && is_opd) + break; + + if ((info->shared + && (h == NULL + || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak) + && (MUST_BE_DYN_RELOC (r_type) + || !SYMBOL_CALLS_LOCAL (info, h))) + || (ELIMINATE_COPY_RELOCS + && !info->shared + && h != NULL + && h->dynindx != -1 + && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) + { + Elf_Internal_Rela outrel; + bfd_boolean skip, relocate; + asection *sreloc; + bfd_byte *loc; + bfd_vma out_off; + + /* When generating a dynamic object, these relocations + are copied into the output file to be resolved at run + time. */ + + skip = FALSE; + relocate = FALSE; + + out_off = _bfd_elf_section_offset (output_bfd, info, + input_section, rel->r_offset); + if (out_off == (bfd_vma) -1) + skip = TRUE; + else if (out_off == (bfd_vma) -2) + skip = TRUE, relocate = TRUE; + out_off += (input_section->output_section->vma + + input_section->output_offset); + outrel.r_offset = out_off; + outrel.r_addend = rel->r_addend; + + /* Optimize unaligned reloc use. */ + if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) + || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) + r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; + else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) + || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) + r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; + else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) + || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) + r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; + + if (skip) + memset (&outrel, 0, sizeof outrel); + else if (!SYMBOL_REFERENCES_LOCAL (info, h) + && !is_opd + && r_type != R_PPC64_TOC) + outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); + else + { + /* This symbol is local, or marked to become local, + or this is an opd section reloc which must point + at a local function. */ + outrel.r_addend += relocation; + if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) + { + if (is_opd && h != NULL) + { + /* Lie about opd entries. This case occurs + when building shared libraries and we + reference a function in another shared + lib. The same thing happens for a weak + definition in an application that's + overridden by a strong definition in a + shared lib. (I believe this is a generic + bug in binutils handling of weak syms.) + In these cases we won't use the opd + entry in this lib. */ + unresolved_reloc = FALSE; + } + outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + + /* We need to relocate .opd contents for ld.so. + Prelink also wants simple and consistent rules + for relocs. This make all RELATIVE relocs have + *r_offset equal to r_addend. */ + relocate = TRUE; + } + else + { + long indx = 0; + + if (bfd_is_abs_section (sec)) + ; + else if (sec == NULL || sec->owner == NULL) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } + else + { + asection *osec; + + osec = sec->output_section; + indx = elf_section_data (osec)->dynindx; + + /* We are turning this relocation into one + against a section symbol, so subtract out + the output section's address but not the + offset of the input section in the output + section. */ + outrel.r_addend -= osec->vma; + } + + outrel.r_info = ELF64_R_INFO (indx, r_type); + } + } + + sreloc = elf_section_data (input_section)->sreloc; + if (sreloc == NULL) + abort (); + + loc = sreloc->contents; + loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + + /* If this reloc is against an external symbol, it will + be computed at runtime, so there's no need to do + anything now. However, for the sake of prelink ensure + that the section contents are a known value. */ + if (! relocate) + { + unresolved_reloc = FALSE; + /* The value chosen here is quite arbitrary as ld.so + ignores section contents except for the special + case of .opd where the contents might be accessed + before relocation. Choose zero, as that won't + cause reloc overflow. */ + relocation = 0; + addend = 0; + /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs + to improve backward compatibility with older + versions of ld. */ + if (r_type == R_PPC64_ADDR64) + addend = outrel.r_addend; + /* Adjust pc_relative relocs to have zero in *r_offset. */ + else if (ppc64_elf_howto_table[r_type]->pc_relative) + addend = (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + } + } + break; + + case R_PPC64_COPY: + case R_PPC64_GLOB_DAT: + case R_PPC64_JMP_SLOT: + case R_PPC64_RELATIVE: + /* We shouldn't ever see these dynamic relocs in relocatable + files. */ + /* Fall through. */ + + case R_PPC64_PLTGOT16: + case R_PPC64_PLTGOT16_DS: + case R_PPC64_PLTGOT16_HA: + case R_PPC64_PLTGOT16_HI: + case R_PPC64_PLTGOT16_LO: + case R_PPC64_PLTGOT16_LO_DS: + case R_PPC64_PLTREL32: + case R_PPC64_PLTREL64: + /* These ones haven't been implemented yet. */ + + (*_bfd_error_handler) + (_("%s: relocation %s is not supported for symbol %s."), + bfd_archive_filename (input_bfd), + ppc64_elf_howto_table[r_type]->name, sym_name); + + bfd_set_error (bfd_error_invalid_operation); + ret = FALSE; + continue; + } + + /* Do any further special processing. */ + switch (r_type) + { + default: + break; + + case R_PPC64_ADDR16_HA: + case R_PPC64_ADDR16_HIGHERA: + case R_PPC64_ADDR16_HIGHESTA: + case R_PPC64_GOT16_HA: + case R_PPC64_PLTGOT16_HA: + case R_PPC64_PLT16_HA: + case R_PPC64_TOC16_HA: + case R_PPC64_SECTOFF_HA: + case R_PPC64_TPREL16_HA: + case R_PPC64_DTPREL16_HA: + case R_PPC64_GOT_TLSGD16_HA: + case R_PPC64_GOT_TLSLD16_HA: + case R_PPC64_GOT_TPREL16_HA: + case R_PPC64_GOT_DTPREL16_HA: + case R_PPC64_TPREL16_HIGHER: + case R_PPC64_TPREL16_HIGHERA: + case R_PPC64_TPREL16_HIGHEST: + case R_PPC64_TPREL16_HIGHESTA: + case R_PPC64_DTPREL16_HIGHER: + case R_PPC64_DTPREL16_HIGHERA: + case R_PPC64_DTPREL16_HIGHEST: + case R_PPC64_DTPREL16_HIGHESTA: + /* It's just possible that this symbol is a weak symbol + that's not actually defined anywhere. In that case, + 'sec' would be NULL, and we should leave the symbol + alone (it will be set to zero elsewhere in the link). */ + if (sec != NULL) + /* Add 0x10000 if sign bit in 0:15 is set. + Bits 0:15 are not used. */ + addend += 0x8000; + break; + + case R_PPC64_ADDR16_DS: + case R_PPC64_ADDR16_LO_DS: + case R_PPC64_GOT16_DS: + case R_PPC64_GOT16_LO_DS: + case R_PPC64_PLT16_LO_DS: + case R_PPC64_SECTOFF_DS: + case R_PPC64_SECTOFF_LO_DS: + case R_PPC64_TOC16_DS: + case R_PPC64_TOC16_LO_DS: + case R_PPC64_PLTGOT16_DS: + case R_PPC64_PLTGOT16_LO_DS: + case R_PPC64_GOT_TPREL16_DS: + case R_PPC64_GOT_TPREL16_LO_DS: + case R_PPC64_GOT_DTPREL16_DS: + case R_PPC64_GOT_DTPREL16_LO_DS: + case R_PPC64_TPREL16_DS: + case R_PPC64_TPREL16_LO_DS: + case R_PPC64_DTPREL16_DS: + case R_PPC64_DTPREL16_LO_DS: + insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); + mask = 3; + /* If this reloc is against an lq insn, then the value must be + a multiple of 16. This is somewhat of a hack, but the + "correct" way to do this by defining _DQ forms of all the + _DS relocs bloats all reloc switches in this file. It + doesn't seem to make much sense to use any of these relocs + in data, so testing the insn should be safe. */ + if ((insn & (0x3f << 26)) == (56u << 26)) + mask = 15; + if (((relocation + addend) & mask) != 0) + { + (*_bfd_error_handler) + (_("%s: error: relocation %s not a multiple of %d"), + bfd_archive_filename (input_bfd), + ppc64_elf_howto_table[r_type]->name, + mask + 1); + bfd_set_error (bfd_error_bad_value); + ret = FALSE; + continue; + } + break; + + case R_PPC64_REL14: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL14_BRTAKEN: + max_br_offset = 1 << 15; + goto branch_check; + + case R_PPC64_REL24: + max_br_offset = 1 << 25; + + branch_check: + /* If the branch is out of reach or the TOC register needs + adjusting, then redirect the call to the local stub for + this function. */ + from = (rel->r_offset + + input_section->output_offset + + input_section->output_section->vma); + if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset + || (sec != NULL + && sec->output_section != NULL + && sec->id <= htab->top_id + && (htab->stub_group[sec->id].toc_off + != htab->stub_group[input_section->id].toc_off))) + && (stub_entry = ppc_get_stub_entry (input_section, sec, h, + rel, htab)) != NULL) + { + /* Munge up the value and addend so that we call the stub + rather than the procedure directly. */ + relocation = (stub_entry->stub_offset + + stub_entry->stub_sec->output_offset + + stub_entry->stub_sec->output_section->vma); + addend = 0; + } + break; + } + + /* Dynamic relocs are not propagated for SEC_DEBUGGING sections + because such sections are not SEC_ALLOC and thus ld.so will + not process them. */ + if (unresolved_reloc + && !((input_section->flags & SEC_DEBUGGING) != 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) + { + (*_bfd_error_handler) + (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), + bfd_archive_filename (input_bfd), + bfd_get_section_name (input_bfd, input_section), + (long) rel->r_offset, + ppc64_elf_howto_table[(int) r_type]->name, + h->root.root.string); + ret = FALSE; + } + + r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], + input_bfd, + input_section, + contents, + rel->r_offset, + relocation, + addend); + + if (r != bfd_reloc_ok) + { + if (sym_name == NULL) + sym_name = "(null)"; + if (r == bfd_reloc_overflow) + { + if (warned) + continue; + if (h != NULL + && h->root.type == bfd_link_hash_undefweak + && ppc64_elf_howto_table[r_type]->pc_relative) + { + /* Assume this is a call protected by other code that + detects the symbol is undefined. If this is the case, + we can safely ignore the overflow. If not, the + program is hosed anyway, and a little warning isn't + going to help. */ + + continue; + } + + if (!((*info->callbacks->reloc_overflow) + (info, sym_name, ppc64_elf_howto_table[r_type]->name, + rel->r_addend, input_bfd, input_section, rel->r_offset))) + return FALSE; + } + else + { + (*_bfd_error_handler) + (_("%s(%s+0x%lx): %s reloc against `%s': error %d"), + bfd_archive_filename (input_bfd), + bfd_get_section_name (input_bfd, input_section), + (long) rel->r_offset, + ppc64_elf_howto_table[r_type]->name, + sym_name, + (int) r); + ret = FALSE; + } + } + } + + return ret; +} + +/* Adjust the value of any local symbols in opd sections. */ + +static bfd_boolean +ppc64_elf_output_symbol_hook (struct bfd_link_info *info, + const char *name ATTRIBUTE_UNUSED, + Elf_Internal_Sym *elfsym, + asection *input_sec, + struct elf_link_hash_entry *h) +{ + long *adjust; + bfd_vma value; + + if (h != NULL + || input_sec == NULL + || ppc64_elf_section_data (input_sec) == NULL + || (adjust = ppc64_elf_section_data (input_sec)->opd.adjust) == NULL) + return TRUE; + + value = elfsym->st_value - input_sec->output_offset; + if (!info->relocatable) + value -= input_sec->output_section->vma; + + elfsym->st_value += adjust[value / 24]; + return TRUE; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static bfd_boolean +ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) +{ + struct ppc_link_hash_table *htab; + bfd *dynobj; + + htab = ppc_hash_table (info); + dynobj = htab->elf.dynobj; + + if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) + { + struct plt_entry *ent; + Elf_Internal_Rela rela; + bfd_byte *loc; + + for (ent = h->plt.plist; ent != NULL; ent = ent->next) + if (ent->plt.offset != (bfd_vma) -1) + { + /* This symbol has an entry in the procedure linkage + table. Set it up. */ + + if (htab->plt == NULL + || htab->relplt == NULL + || htab->glink == NULL) + abort (); + + /* Create a JMP_SLOT reloc to inform the dynamic linker to + fill in the PLT entry. */ + rela.r_offset = (htab->plt->output_section->vma + + htab->plt->output_offset + + ent->plt.offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); + rela.r_addend = ent->addend; + + loc = htab->relplt->contents; + loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE + * sizeof (Elf64_External_Rela)); + bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); + } + } + + if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) + { + Elf_Internal_Rela rela; + bfd_byte *loc; + + /* This symbol needs a copy reloc. Set it up. */ + + if (h->dynindx == -1 + || (h->root.type != bfd_link_hash_defined + && h->root.type != bfd_link_hash_defweak) + || htab->relbss == NULL) + abort (); + + rela.r_offset = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); + rela.r_addend = 0; + loc = htab->relbss->contents; + loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela); + bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); + } + + /* Mark some specially defined symbols as absolute. */ + if (strcmp (h->root.root.string, "_DYNAMIC") == 0) + sym->st_shndx = SHN_ABS; + + return TRUE; +} + +/* Used to decide how to sort relocs in an optimal manner for the + dynamic linker, before writing them out. */ + +static enum elf_reloc_type_class +ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela) +{ + enum elf_ppc64_reloc_type r_type; + + r_type = ELF64_R_TYPE (rela->r_info); + switch (r_type) + { + case R_PPC64_RELATIVE: + return reloc_class_relative; + case R_PPC64_JMP_SLOT: + return reloc_class_plt; + case R_PPC64_COPY: + return reloc_class_copy; + default: + return reloc_class_normal; + } +} + +/* Finish up the dynamic sections. */ + +static bfd_boolean +ppc64_elf_finish_dynamic_sections (bfd *output_bfd, + struct bfd_link_info *info) +{ + struct ppc_link_hash_table *htab; + bfd *dynobj; + asection *sdyn; + + htab = ppc_hash_table (info); + dynobj = htab->elf.dynobj; + sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); + + if (htab->elf.dynamic_sections_created) + { + Elf64_External_Dyn *dyncon, *dynconend; + + if (sdyn == NULL || htab->got == NULL) + abort (); + + dyncon = (Elf64_External_Dyn *) sdyn->contents; + dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + asection *s; + + bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + continue; + + case DT_PPC64_GLINK: + s = htab->glink; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + /* We stupidly defined DT_PPC64_GLINK to be the start + of glink rather than the first entry point, which is + what ld.so needs, and now have a bigger stub to + support automatic multiple TOCs. */ + dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32; + break; + + case DT_PPC64_OPD: + s = bfd_get_section_by_name (output_bfd, ".opd"); + if (s == NULL) + continue; + dyn.d_un.d_ptr = s->vma; + break; + + case DT_PPC64_OPDSZ: + s = bfd_get_section_by_name (output_bfd, ".opd"); + if (s == NULL) + continue; + dyn.d_un.d_val = s->_raw_size; + break; + + case DT_PLTGOT: + s = htab->plt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + break; + + case DT_JMPREL: + s = htab->relplt; + dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; + break; + + case DT_PLTRELSZ: + dyn.d_un.d_val = htab->relplt->_raw_size; + break; + + case DT_RELASZ: + /* Don't count procedure linkage table relocs in the + overall reloc count. */ + s = htab->relplt; + if (s == NULL) + continue; + dyn.d_un.d_val -= s->_raw_size; + break; + + case DT_RELA: + /* We may not be using the standard ELF linker script. + If .rela.plt is the first .rela section, we adjust + DT_RELA to not include it. */ + s = htab->relplt; + if (s == NULL) + continue; + if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) + continue; + dyn.d_un.d_ptr += s->_raw_size; + break; + } + + bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); + } + } + + if (htab->got != NULL && htab->got->_raw_size != 0) + { + /* Fill in the first entry in the global offset table. + We use it to hold the link-time TOCbase. */ + bfd_put_64 (output_bfd, + elf_gp (output_bfd) + TOC_BASE_OFF, + htab->got->contents); + + /* Set .got entry size. */ + elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8; + } + + if (htab->plt != NULL && htab->plt->_raw_size != 0) + { + /* Set .plt entry size. */ + elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize + = PLT_ENTRY_SIZE; + } + + /* We need to handle writing out multiple GOT sections ourselves, + since we didn't add them to DYNOBJ. */ + while ((dynobj = dynobj->link_next) != NULL) + { + asection *s; + s = ppc64_elf_tdata (dynobj)->got; + if (s != NULL + && s->_raw_size != 0 + && s->output_section != bfd_abs_section_ptr + && !bfd_set_section_contents (output_bfd, s->output_section, + s->contents, s->output_offset, + s->_raw_size)) + return FALSE; + s = ppc64_elf_tdata (dynobj)->relgot; + if (s != NULL + && s->_raw_size != 0 + && s->output_section != bfd_abs_section_ptr + && !bfd_set_section_contents (output_bfd, s->output_section, + s->contents, s->output_offset, + s->_raw_size)) + return FALSE; + } + + return TRUE; +} + +#include "elf64-target.h" |
