diff options
Diffstat (limited to 'contrib/binutils/bfd/elf64-ppc.c')
| -rw-r--r-- | contrib/binutils/bfd/elf64-ppc.c | 4463 |
1 files changed, 4463 insertions, 0 deletions
diff --git a/contrib/binutils/bfd/elf64-ppc.c b/contrib/binutils/bfd/elf64-ppc.c new file mode 100644 index 0000000..da339bb --- /dev/null +++ b/contrib/binutils/bfd/elf64-ppc.c @@ -0,0 +1,4463 @@ +/* PowerPC64-specific support for 64-bit ELF. + Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. + Written by Linus Nordberg, Swox AB <info@swox.com>, + based on elf32-ppc.c by Ian Lance Taylor. + +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. */ + +/* This file is based on the 64-bit PowerPC ELF ABI. It is also based + on the file elf32-ppc.c. */ + +#include "bfd.h" +#include "sysdep.h" +#include "bfdlink.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/ppc.h" +#include "elf64-ppc.h" + +#define USE_RELA /* we want RELA relocations, not REL. */ + + +static void ppc_howto_init + PARAMS ((void)); +static reloc_howto_type *ppc64_elf_reloc_type_lookup + PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); +static void ppc64_elf_info_to_howto + PARAMS ((bfd *abfd, arelent *cache_ptr, Elf64_Internal_Rela *dst)); +static bfd_reloc_status_type ppc64_elf_addr16_ha_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static boolean ppc64_elf_set_private_flags + PARAMS ((bfd *, flagword)); +static boolean ppc64_elf_merge_private_bfd_data + PARAMS ((bfd *, bfd *)); +static boolean ppc64_elf_section_from_shdr + PARAMS ((bfd *, Elf64_Internal_Shdr *, char *)); +static struct bfd_hash_entry *link_hash_newfunc + PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); +static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create + PARAMS ((bfd *)); +static boolean create_got_section + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean ppc64_elf_create_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +static void ppc64_elf_copy_indirect_symbol + PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *)); +static boolean ppc64_elf_check_relocs + PARAMS ((bfd *, struct bfd_link_info *, asection *, + const Elf_Internal_Rela *)); +static asection * ppc64_elf_gc_mark_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)); +static boolean ppc64_elf_gc_sweep_hook + PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *sec, + const Elf_Internal_Rela *relocs)); +static boolean func_desc_adjust + PARAMS ((struct elf_link_hash_entry *, PTR)); +static boolean ppc64_elf_func_desc_adjust + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean ppc64_elf_adjust_dynamic_symbol + PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); +static void ppc64_elf_hide_symbol + PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean)); +static boolean allocate_dynrelocs + PARAMS ((struct elf_link_hash_entry *, PTR)); +static boolean readonly_dynrelocs + PARAMS ((struct elf_link_hash_entry *, PTR)); +static enum elf_reloc_type_class ppc64_elf_reloc_type_class + PARAMS ((const Elf_Internal_Rela *)); +static boolean ppc64_elf_size_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +static bfd_byte *build_plt_stub + PARAMS ((bfd *, bfd_byte *, int, int)); +static boolean build_one_stub + PARAMS ((struct elf_link_hash_entry *, PTR)); +static boolean ppc64_elf_fake_sections + PARAMS ((bfd *, Elf64_Internal_Shdr *, asection *)); +static boolean ppc64_elf_relocate_section + PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *, + Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, + asection **)); +static boolean ppc64_elf_finish_dynamic_symbol + PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, + Elf_Internal_Sym *)); +static boolean ppc64_elf_finish_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); + + +/* Mask to set RA in memory instructions. */ +#define RA_REGISTER_MASK 0x001f0000 + +/* Value to shift register by to insert RA. */ +#define RA_REGISTER_SHIFT 16 + +/* 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) + +/* .plt call stub instructions. */ +#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 */ + +/* The normal stub is this size. */ +#define PLT_CALL_STUB_SIZE (7*4) + +/* But sometimes the .plt entry crosses a 64k boundary, and we need + to adjust the high word with this insn. */ +#define ADDIS_R12_R12_1 0x3d8c0001 /* addis %r12,%r12,1 */ + +/* The .glink fixup call stub is the same as the .plt call stub, but + the first instruction restores r2, and the std is omitted. */ +#define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ + +/* Always allow this much space. */ +#define GLINK_CALL_STUB_SIZE (8*4) + +/* Pad with this. */ +#define NOP 0x60000000 + +/* .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 */ + +/* 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. FIXME: the dynamic linker + will need to know where and how large .opd is via a couple of new + DT_PPC64_* tags, or perhaps just with one reloc that specifies the + start of .opd via its offset and the size via its addend. Also, + .opd should be trimmed of unused values. */ +#ifndef NO_OPD_RELOCS +#define NO_OPD_RELOCS 0 +#endif + +/* Relocation HOWTO's. */ +static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC_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_bitfield, /* 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 */ + 0x3fffffc, /* 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_addr16_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 */ + 0xfffc, /* 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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR14_BRTAKEN",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* 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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_ADDR14_BRNTAKEN",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* 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 */ + 0x3fffffc, /* 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 */ + 0xfffc, /* 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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL14_BRTAKEN", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* 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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_REL14_BRNTAKEN",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* 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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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_addr16_ha_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 */ + 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_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_GLOB_DAT", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* 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 */ + bfd_elf_generic_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 */ + 0xffffffffffffffff, /* 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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLT32", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* 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 */ + 0, /* 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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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_addr16_ha_reloc, /* special_function */ + "R_PPC64_PLT16_HA", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 32-bit section relative relocation. */ + /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and + dst_mask=0. */ + HOWTO (R_PPC64_SECTOFF, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_SECTOFF", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + true), /* pcrel_offset */ + + /* 16-bit lower half section relative relocation. */ + 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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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_addr16_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. */ + /* FIXME: Verify R_PPC64_ADDR30. */ + HOWTO (R_PPC64_ADDR30, /* 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_ADDR30", /* 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 */ + 0xffffffffffffffff, /* 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_addr16_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_addr16_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 */ + 0xffffffffffffffff, /* 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 */ + 0xffffffffffffffff, /* 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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLT64", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* 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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTREL64", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* 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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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_addr16_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_TOC", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xffffffffffffffff, /* 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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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_addr16_ha_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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. */ + /* FIXME: Verify R_PPC64_SECTOFF. Seems strange with size=2 and + dst_mask=0. */ + HOWTO (R_PPC64_SECTOFF_DS, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_SECTOFF_DS", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + true), /* 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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_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 */ + bfd_elf_generic_reloc, /* special_function */ + "R_PPC64_PLTGOT16_LO_DS",/* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0xfffc, /* 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 () +{ + 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 (abfd, code) + bfd *abfd ATTRIBUTE_UNUSED; + bfd_reloc_code_real_type code; +{ + enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE; + + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + /* Initialize howto table if needed. */ + ppc_howto_init (); + + switch ((int) code) + { + default: + return (reloc_howto_type *) NULL; + + case BFD_RELOC_NONE: ppc_reloc = R_PPC64_NONE; + break; + case BFD_RELOC_32: ppc_reloc = R_PPC64_ADDR32; + break; + case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC64_ADDR24; + break; + case BFD_RELOC_16: ppc_reloc = R_PPC64_ADDR16; + break; + case BFD_RELOC_LO16: ppc_reloc = R_PPC64_ADDR16_LO; + break; + case BFD_RELOC_HI16: ppc_reloc = R_PPC64_ADDR16_HI; + break; + case BFD_RELOC_HI16_S: ppc_reloc = R_PPC64_ADDR16_HA; + break; + case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC64_ADDR14; + break; + case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC64_ADDR14_BRTAKEN; + break; + case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC64_ADDR14_BRNTAKEN; + break; + case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC64_REL24; + break; + case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC64_REL14; + break; + case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC64_REL14_BRTAKEN; + break; + case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC64_REL14_BRNTAKEN; + break; + case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC64_GOT16; + break; + case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC64_GOT16_LO; + break; + case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC64_GOT16_HI; + break; + case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC64_GOT16_HA; + break; + case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC64_COPY; + break; + case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC64_GLOB_DAT; + break; + case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC64_REL32; + break; + case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC64_PLT32; + break; + case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL32; + break; + case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC64_PLT16_LO; + break; + case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC64_PLT16_HI; + break; + case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC64_PLT16_HA; + break; + case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC64_SECTOFF; + break; + case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_LO; + break; + case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HI; + break; + case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC64_SECTOFF_HA; + break; + case BFD_RELOC_CTOR: ppc_reloc = R_PPC64_ADDR64; + break; + case BFD_RELOC_64: ppc_reloc = R_PPC64_ADDR64; + break; + case BFD_RELOC_PPC64_HIGHER: ppc_reloc = R_PPC64_ADDR16_HIGHER; + break; + case BFD_RELOC_PPC64_HIGHER_S: ppc_reloc = R_PPC64_ADDR16_HIGHERA; + break; + case BFD_RELOC_PPC64_HIGHEST: ppc_reloc = R_PPC64_ADDR16_HIGHEST; + break; + case BFD_RELOC_PPC64_HIGHEST_S: ppc_reloc = R_PPC64_ADDR16_HIGHESTA; + break; + case BFD_RELOC_64_PCREL: ppc_reloc = R_PPC64_REL64; + break; + case BFD_RELOC_64_PLTOFF: ppc_reloc = R_PPC64_PLT64; + break; + case BFD_RELOC_64_PLT_PCREL: ppc_reloc = R_PPC64_PLTREL64; + break; + case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC64_TOC16; + break; + case BFD_RELOC_PPC64_TOC16_LO: ppc_reloc = R_PPC64_TOC16_LO; + break; + case BFD_RELOC_PPC64_TOC16_HI: ppc_reloc = R_PPC64_TOC16_HI; + break; + case BFD_RELOC_PPC64_TOC16_HA: ppc_reloc = R_PPC64_TOC16_HA; + break; + case BFD_RELOC_PPC64_TOC: ppc_reloc = R_PPC64_TOC; + break; + case BFD_RELOC_PPC64_PLTGOT16: ppc_reloc = R_PPC64_PLTGOT16; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO: ppc_reloc = R_PPC64_PLTGOT16_LO; + break; + case BFD_RELOC_PPC64_PLTGOT16_HI: ppc_reloc = R_PPC64_PLTGOT16_HI; + break; + case BFD_RELOC_PPC64_PLTGOT16_HA: ppc_reloc = R_PPC64_PLTGOT16_HA; + break; + case BFD_RELOC_PPC64_ADDR16_DS: ppc_reloc = R_PPC64_ADDR16_DS; + break; + case BFD_RELOC_PPC64_ADDR16_LO_DS: ppc_reloc = R_PPC64_ADDR16_LO_DS; + break; + case BFD_RELOC_PPC64_GOT16_DS: ppc_reloc = R_PPC64_GOT16_DS; + break; + case BFD_RELOC_PPC64_GOT16_LO_DS: ppc_reloc = R_PPC64_GOT16_LO_DS; + break; + case BFD_RELOC_PPC64_PLT16_LO_DS: ppc_reloc = R_PPC64_PLT16_LO_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_DS: ppc_reloc = R_PPC64_SECTOFF_DS; + break; + case BFD_RELOC_PPC64_SECTOFF_LO_DS: ppc_reloc = R_PPC64_SECTOFF_LO_DS; + break; + case BFD_RELOC_PPC64_TOC16_DS: ppc_reloc = R_PPC64_TOC16_DS; + break; + case BFD_RELOC_PPC64_TOC16_LO_DS: ppc_reloc = R_PPC64_TOC16_LO_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_DS: ppc_reloc = R_PPC64_PLTGOT16_DS; + break; + case BFD_RELOC_PPC64_PLTGOT16_LO_DS: ppc_reloc = R_PPC64_PLTGOT16_LO_DS; + break; + case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC64_GNU_VTINHERIT; + break; + case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC64_GNU_VTENTRY; + break; + } + + return ppc64_elf_howto_table[(int) ppc_reloc]; +}; + +/* Set the howto pointer for a PowerPC ELF reloc. */ + +static void +ppc64_elf_info_to_howto (abfd, cache_ptr, dst) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *cache_ptr; + Elf64_Internal_Rela *dst; +{ + unsigned int type; + + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + /* Initialize howto table if needed. */ + 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_PPC_ADDR16_HA and similar relocs. */ + +static bfd_reloc_status_type +ppc64_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section, + output_bfd, error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol; + PTR data ATTRIBUTE_UNUSED; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + bfd_vma relocation; + + if (output_bfd != NULL) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (reloc_entry->address > input_section->_cooked_size) + return bfd_reloc_outofrange; + + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + + relocation += symbol->section->output_section->vma; + relocation += symbol->section->output_offset; + relocation += reloc_entry->addend; + + reloc_entry->addend += (relocation & 0x8000) << 1; + + return bfd_reloc_continue; +} + +/* Function to set whether a module needs the -mrelocatable bit set. */ + +static boolean +ppc64_elf_set_private_flags (abfd, flags) + bfd *abfd; + flagword flags; +{ + BFD_ASSERT (!elf_flags_init (abfd) + || elf_elfheader (abfd)->e_flags == flags); + + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = true; + return true; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ +static boolean +ppc64_elf_merge_private_bfd_data (ibfd, obfd) + bfd *ibfd; + bfd *obfd; +{ + flagword old_flags; + flagword new_flags; + boolean error; + + /* Check if we have the same endianess. */ + if (ibfd->xvec->byteorder != obfd->xvec->byteorder + && 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; + } + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return true; + + new_flags = elf_elfheader (ibfd)->e_flags; + old_flags = elf_elfheader (obfd)->e_flags; + if (!elf_flags_init (obfd)) + { + /* First call, no flags set. */ + elf_flags_init (obfd) = true; + elf_elfheader (obfd)->e_flags = new_flags; + } + + else if (new_flags == old_flags) + /* Compatible flags are ok. */ + ; + + else + { + /* Incompatible flags. Warn about -mrelocatable mismatch. + Allow -mrelocatable-lib to be linked with either. */ + error = false; + if ((new_flags & EF_PPC_RELOCATABLE) != 0 + && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) + { + error = true; + (*_bfd_error_handler) + (_("%s: compiled with -mrelocatable and linked with modules compiled normally"), + bfd_archive_filename (ibfd)); + } + else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 + && (old_flags & EF_PPC_RELOCATABLE) != 0) + { + error = true; + (*_bfd_error_handler) + (_("%s: compiled normally and linked with modules compiled with -mrelocatable"), + bfd_archive_filename (ibfd)); + } + + /* The output is -mrelocatable-lib iff both the input files are. */ + if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) + elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; + + /* The output is -mrelocatable iff it can't be -mrelocatable-lib, + but each input file is either -mrelocatable or -mrelocatable-lib. */ + if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) + && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) + && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) + elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; + + /* Do not warn about eabi vs. V.4 mismatch, just or in the bit + if any module uses it. */ + elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); + + new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); + old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); + + /* Warn about any other mismatches. */ + if (new_flags != old_flags) + { + error = true; + (*_bfd_error_handler) + (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), + bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags); + } + + if (error) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + } + + return true; +} + +/* Handle a PowerPC specific section when reading an object file. This + is called when elfcode.h finds a section with an unknown type. */ + +static boolean +ppc64_elf_section_from_shdr (abfd, hdr, name) + bfd *abfd; + Elf64_Internal_Shdr *hdr; + char *name; +{ + asection *newsect; + flagword flags; + + if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) + return false; + + newsect = hdr->bfd_section; + flags = bfd_get_section_flags (abfd, newsect); + if (hdr->sh_flags & SHF_EXCLUDE) + flags |= SEC_EXCLUDE; + + if (hdr->sh_type == SHT_ORDERED) + flags |= SEC_SORT_ENTRIES; + + bfd_set_section_flags (abfd, newsect, flags); + return true; +} + +/* 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 optimised, 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; +}; + +/* Of those relocs that might be copied as dynamic relocs, this macro + selects between relative and absolute types. */ + +#define IS_ABSOLUTE_RELOC(RTYPE) \ + ((RTYPE) != R_PPC64_REL14 \ + && (RTYPE) != R_PPC64_REL14_BRNTAKEN \ + && (RTYPE) != R_PPC64_REL14_BRTAKEN \ + && (RTYPE) != R_PPC64_REL24 \ + && (RTYPE) != R_PPC64_REL32 \ + && (RTYPE) != R_PPC64_REL64) + +/* ppc64 ELF linker hash entry. */ + +struct ppc_link_hash_entry +{ + struct elf_link_hash_entry elf; + + /* Track dynamic relocs copied for this symbol. */ + struct ppc_dyn_relocs *dyn_relocs; + + /* Flag function code and descriptor symbols. */ + unsigned int is_func:1; + unsigned int is_func_descriptor:1; +}; + +/* ppc64 ELF linker hash table. */ + +struct ppc_link_hash_table +{ + struct elf_link_hash_table elf; + + /* Short-cuts to get to dynamic linker sections. */ + asection *sgot; + asection *srelgot; + asection *splt; + asection *srelplt; + asection *sdynbss; + asection *srelbss; + asection *sstub; + asection *sglink; + + /* Set on error. */ + int plt_overflow; + + /* 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)) + +/* Create an entry in a ppc64 ELF linker hash table. */ + +static struct bfd_hash_entry * +link_hash_newfunc (entry, table, string) + 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->dyn_relocs = NULL; + eh->is_func = 0; + eh->is_func_descriptor = 0; + } + + return entry; +} + +/* Create a ppc64 ELF linker hash table. */ + +static struct bfd_link_hash_table * +ppc64_elf_link_hash_table_create (abfd) + bfd *abfd; +{ + struct ppc_link_hash_table *htab; + bfd_size_type amt = sizeof (struct ppc_link_hash_table); + + htab = (struct ppc_link_hash_table *) bfd_alloc (abfd, amt); + if (htab == NULL) + return NULL; + + if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc)) + { + bfd_release (abfd, htab); + return NULL; + } + + htab->sgot = NULL; + htab->srelgot = NULL; + htab->splt = NULL; + htab->srelplt = NULL; + htab->sdynbss = NULL; + htab->srelbss = NULL; + htab->sstub = NULL; + htab->sglink = NULL; + htab->plt_overflow = 0; + htab->sym_sec.abfd = NULL; + + return &htab->elf.root; +} + +/* Create .got and .rela.got sections in DYNOBJ, and set up + shortcuts to them in our hash table. */ + +static boolean +create_got_section (dynobj, info) + bfd *dynobj; + struct bfd_link_info *info; +{ + struct ppc_link_hash_table *htab; + + if (! _bfd_elf_create_got_section (dynobj, info)) + return false; + + htab = ppc_hash_table (info); + htab->sgot = bfd_get_section_by_name (dynobj, ".got"); + if (!htab->sgot) + abort (); + + htab->srelgot = bfd_make_section (dynobj, ".rela.got"); + if (!htab->srelgot + || ! bfd_set_section_flags (dynobj, htab->srelgot, + (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS + | SEC_IN_MEMORY | SEC_LINKER_CREATED + | SEC_READONLY)) + || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) + return false; + return true; +} + +/* Create the .stub and .glink sections as well as the ordinary + dynamic sections. */ + +static boolean +ppc64_elf_create_dynamic_sections (dynobj, info) + bfd *dynobj; + struct bfd_link_info *info; +{ + struct ppc_link_hash_table *htab; + flagword flags; + + htab = ppc_hash_table (info); + if (!htab->sgot && !create_got_section (dynobj, info)) + return false; + + if (!_bfd_elf_create_dynamic_sections (dynobj, info)) + return false; + + htab->splt = bfd_get_section_by_name (dynobj, ".plt"); + htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); + htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); + if (!info->shared) + htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); + + if (!htab->splt || !htab->srelplt || !htab->sdynbss + || (!info->shared && !htab->srelbss)) + abort (); + + /* Create .stub and .glink for global linkage functions. */ + flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); + htab->sstub = bfd_make_section (dynobj, ".stub"); + if (htab->sstub == NULL + || ! bfd_set_section_flags (dynobj, htab->sstub, flags) + || ! bfd_set_section_alignment (dynobj, htab->sstub, 2)) + return false; + htab->sglink = bfd_make_section (dynobj, ".glink"); + if (htab->sglink == NULL + || ! bfd_set_section_flags (dynobj, htab->sglink, flags) + || ! bfd_set_section_alignment (dynobj, htab->sglink, 3)) + return false; + + return true; +} + +/* Copy the extra info we tack onto an elf_link_hash_entry. */ + +static void +ppc64_elf_copy_indirect_symbol (dir, ind) + struct elf_link_hash_entry *dir, *ind; +{ + struct ppc_link_hash_entry *edir, *eind; + + edir = (struct ppc_link_hash_entry *) dir; + eind = (struct ppc_link_hash_entry *) ind; + + if (eind->dyn_relocs != NULL) + { + if (edir->dyn_relocs != NULL) + { + struct ppc_dyn_relocs **pp; + struct ppc_dyn_relocs *p; + + if (ind->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; + + _bfd_elf_link_hash_copy_indirect (dir, ind); +} + +/* 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 boolean +ppc64_elf_check_relocs (abfd, info, sec, 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; + boolean is_opd; + + if (info->relocateable) + 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)); + if (!elf_bad_symtab (abfd)) + sym_hashes_end -= symtab_hdr->sh_info; + + sreloc = NULL; + is_opd = strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0; + + 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_ppc_reloc_type r_type; + + 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 = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + /* GOT16 relocations */ + 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. */ + if (htab->sgot == NULL) + { + if (htab->elf.dynobj == NULL) + htab->elf.dynobj = abfd; + if (!create_got_section (htab->elf.dynobj, info)) + return false; + } + + if (h != NULL) + { + h->got.refcount += 1; + } + else + { + bfd_signed_vma *local_got_refcounts; + + /* This is a global offset table entry for a local symbol. */ + local_got_refcounts = elf_local_got_refcounts (abfd); + if (local_got_refcounts == NULL) + { + bfd_size_type size; + + size = symtab_hdr->sh_info; + size *= sizeof (bfd_signed_vma); + local_got_refcounts = ((bfd_signed_vma *) + bfd_zalloc (abfd, size)); + if (local_got_refcounts == NULL) + return false; + elf_local_got_refcounts (abfd) = local_got_refcounts; + } + local_got_refcounts[r_symndx] += 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: + /* 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; + } + + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->plt.refcount += 1; + ((struct ppc_link_hash_entry *) h)->is_func = 1; + 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_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: + break; + + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_PPC64_GNU_VTINHERIT: + if (!_bfd_elf64_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_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return false; + break; + + 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. */ + h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + h->plt.refcount += 1; + ((struct ppc_link_hash_entry *) h)->is_func = 1; + } + break; + + case R_PPC64_ADDR64: + if (is_opd + && h != NULL + && h->root.root.string[0] == '.' + && h->root.root.string[1] != 0) + { + struct elf_link_hash_entry *fdh; + + fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, + false, false, false); + if (fdh != NULL) + { + /* Ensure the function descriptor symbol string is + part of the code symbol string. We aren't + changing the name here, just allowing some tricks + in ppc64_elf_hide_symbol. */ + fdh->root.root.string = h->root.root.string + 1; + ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; + ((struct ppc_link_hash_entry *) h)->is_func = 1; + } + } + /* Fall through. */ + + case R_PPC64_REL64: + case R_PPC64_REL32: + case R_PPC64_REL14: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL14_BRNTAKEN: + 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_ADDR30: + case R_PPC64_ADDR32: + case R_PPC64_UADDR16: + case R_PPC64_UADDR32: + case R_PPC64_UADDR64: + case R_PPC64_TOC: + /* Don't propagate .opd relocs. */ + if (NO_OPD_RELOCS && is_opd) + 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 relocs_copied 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. */ + if ((info->shared + && (sec->flags & SEC_ALLOC) != 0 + && (IS_ABSOLUTE_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)))) + || (!info->shared + && (sec->flags & SEC_ALLOC) != 0 + && 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); + } + + if (htab->elf.dynobj == NULL) + htab->elf.dynobj = abfd; + + 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 = ((struct ppc_dyn_relocs *) + bfd_alloc (htab->elf.dynobj, + (bfd_size_type) 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 (!IS_ABSOLUTE_RELOC (r_type)) + p->pc_count += 1; + } + break; + + default: + } + } + + return true; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +ppc64_elf_gc_mark_hook (abfd, info, rel, h, sym) + bfd *abfd; + struct bfd_link_info *info ATTRIBUTE_UNUSED; + Elf_Internal_Rela *rel; + struct elf_link_hash_entry *h; + Elf_Internal_Sym *sym; +{ + if (h != NULL) + { + enum elf_ppc_reloc_type r_type; + + r_type = (enum elf_ppc_reloc_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: + return h->root.u.def.section; + + case bfd_link_hash_common: + return h->root.u.c.p->section; + + default: + break; + } + } + } + else + { + return bfd_section_from_elf_index (abfd, sym->st_shndx); + } + + return NULL; +} + +/* Update the .got, .plt. and dynamic reloc reference counts for the + section being removed. */ + +static boolean +ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs) + bfd *abfd; + struct bfd_link_info *info ATTRIBUTE_UNUSED; + asection *sec; + const Elf_Internal_Rela *relocs; +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + bfd_signed_vma *local_got_refcounts; + const Elf_Internal_Rela *rel, *relend; + + elf_section_data (sec)->local_dynrel = NULL; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + local_got_refcounts = elf_local_got_refcounts (abfd); + + relend = relocs + sec->reloc_count; + for (rel = relocs; rel < relend; rel++) + { + unsigned long r_symndx; + enum elf_ppc_reloc_type r_type; + struct elf_link_hash_entry *h; + + r_symndx = ELF64_R_SYM (rel->r_info); + r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); + switch (r_type) + { + 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: + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->got.refcount > 0) + h->got.refcount--; + } + else + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx]--; + } + break; + + case R_PPC64_PLT16_HA: + case R_PPC64_PLT16_HI: + case R_PPC64_PLT16_LO: + case R_PPC64_PLT32: + case R_PPC64_PLT64: + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->plt.refcount > 0) + h->plt.refcount--; + } + break; + + case R_PPC64_REL24: + if (r_symndx >= symtab_hdr->sh_info) + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + if (h->plt.refcount > 0) + h->plt.refcount--; + } + break; + + case R_PPC64_REL14: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL14_BRTAKEN: + case R_PPC64_REL32: + case R_PPC64_REL64: + 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) + { + p->pc_count -= 1; + p->count -= 1; + if (p->count == 0) + *pp = p->next; + break; + } + } + break; + + 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_ADDR30: + case R_PPC64_ADDR32: + case R_PPC64_ADDR64: + case R_PPC64_UADDR16: + case R_PPC64_UADDR32: + case R_PPC64_UADDR64: + case R_PPC64_TOC: + 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) + { + p->count -= 1; + if (p->count == 0) + *pp = p->next; + break; + } + } + 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 boolean +func_desc_adjust (h, inf) + struct elf_link_hash_entry *h; + PTR inf; +{ + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + + if (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + return true; + + info = (struct bfd_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 (!((struct ppc_link_hash_entry *) h)->is_func) + return true; + + if (h->plt.refcount > 0 + && h->root.root.string[0] == '.' + && h->root.root.string[1] != '\0') + { + struct elf_link_hash_entry *fdh; + boolean force_local; + + /* Find the corresponding function descriptor symbol. Create it + as undefined if necessary. */ + + fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, + false, false, true); + + if (fdh == NULL && info->shared) + { + bfd *abfd; + asymbol *newsym; + + /* Create it as undefined. */ + if (h->root.type == bfd_link_hash_undefined + || h->root.type == bfd_link_hash_undefweak) + abfd = h->root.u.undef.abfd; + else if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + abfd = h->root.u.def.section->owner; + else + abort (); + newsym = bfd_make_empty_symbol (abfd); + newsym->name = h->root.root.string + 1; + newsym->section = bfd_und_section_ptr; + newsym->value = 0; + newsym->flags = BSF_OBJECT; + if (h->root.type == bfd_link_hash_undefweak) + newsym->flags |= BSF_WEAK; + + if ( !(_bfd_generic_link_add_one_symbol + (info, abfd, newsym->name, newsym->flags, + newsym->section, newsym->value, NULL, false, false, + (struct bfd_link_hash_entry **) &fdh))) + { + return false; + } + } + + if (fdh != NULL + && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 + && (info->shared + || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 + || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) + { + if (fdh->dynindx == -1) + if (! bfd_elf64_link_record_dynamic_symbol (info, fdh)) + return false; + fdh->plt.refcount = h->plt.refcount; + fdh->elf_link_hash_flags |= (h->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)); + fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; + ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; + fdh->root.root.string = h->root.root.string + 1; + } + + /* 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 a definition in from a static library. */ + force_local = (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0; + _bfd_elf_link_hash_hide_symbol (info, h, force_local); + } + + return true; +} + +/* Called near the start of bfd_elf_size_dynamic_sections. We use + this hook to transfer dynamic linking information gathered so far + on function code symbol entries, to their corresponding function + descriptor symbol entries. */ +static boolean +ppc64_elf_func_desc_adjust (obfd, info) + bfd *obfd ATTRIBUTE_UNUSED; + struct bfd_link_info *info; +{ + struct ppc_link_hash_table *htab; + + htab = ppc_hash_table (info); + elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info); + 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 boolean +ppc64_elf_adjust_dynamic_symbol (info, h) + struct bfd_link_info *info; + struct elf_link_hash_entry *h; +{ + struct ppc_link_hash_table *htab; + struct ppc_link_hash_entry * eh; + struct ppc_dyn_relocs *p; + 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. */ + if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor + || h->plt.refcount <= 0 + || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 + || (! info->shared + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 + && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)) + { + h->plt.offset = (bfd_vma) -1; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + return true; + } + else + h->plt.offset = (bfd_vma) -1; + + /* 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; + return true; + } + + /* This is a reference to a symbol defined by a dynamic object which + is not a function. */ + + /* 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; + + 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; + } + + /* 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_PPC_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->srelbss->_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->sdynbss; + 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 (info, h, force_local) + struct bfd_link_info *info; + struct elf_link_hash_entry *h; + boolean force_local; +{ + _bfd_elf_link_hash_hide_symbol (info, h, force_local); + + if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) + { + const char *name; + struct elf_link_hash_entry *fh; + struct ppc_link_hash_table *htab; + + name = h->root.root.string - 1; + htab = ppc_hash_table (info); + fh = elf_link_hash_lookup (&htab->elf, name, false, false, false); + if (fh != NULL) + _bfd_elf_link_hash_hide_symbol (info, fh, force_local); + } +} + +/* This is the condition under which ppc64_elf_finish_dynamic_symbol + will be called from elflink.h. If elflink.h doesn't call our + finish_dynamic_symbol routine, we'll need to do something about + initializing any .plt and .got entries in ppc64_elf_relocate_section. */ +#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ + ((DYN) \ + && ((INFO)->shared \ + || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ + && ((H)->dynindx != -1 \ + || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) + +/* Allocate space in .plt, .got and associated reloc sections for + dynamic relocs. */ + +static boolean +allocate_dynrelocs (h, inf) + struct elf_link_hash_entry *h; + PTR 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; + + if (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + return true; + + info = (struct bfd_link_info *) inf; + htab = ppc_hash_table (info); + + if (htab->elf.dynamic_sections_created + && h->plt.refcount > 0 + && h->dynindx != -1) + { + BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor); + + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) + { + /* If this is the first .plt entry, make room for the special + first entry. */ + s = htab->splt; + if (s->_raw_size == 0) + s->_raw_size += PLT_INITIAL_ENTRY_SIZE; + + h->plt.offset = s->_raw_size; + + /* Make room for this entry. */ + s->_raw_size += PLT_ENTRY_SIZE; + + /* Make room for the .stub and .glink code. */ + s = htab->sstub; + s->_raw_size += PLT_CALL_STUB_SIZE; + + s = htab->sglink; + 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->srelplt; + s->_raw_size += sizeof (Elf64_External_Rela); + } + else + { + h->plt.offset = (bfd_vma) -1; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + } + else + { + h->plt.offset = (bfd_vma) -1; + h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; + } + + if (h->got.refcount > 0) + { + boolean dyn; + + /* 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_elf64_link_record_dynamic_symbol (info, h)) + return false; + } + + s = htab->sgot; + h->got.offset = s->_raw_size; + s->_raw_size += 8; + dyn = htab->elf.dynamic_sections_created; + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) + htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); + } + else + h->got.offset = (bfd_vma) -1; + + eh = (struct ppc_link_hash_entry *) h; + 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) + { + if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 + && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 + || info->symbolic)) + { + 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; + } + } + } + else + { + /* 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) + || (htab->elf.dynamic_sections_created + && (h->root.type == bfd_link_hash_undefweak + || h->root.type == bfd_link_hash_undefined)))) + { + /* 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_elf64_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 boolean +readonly_dynrelocs (h, inf) + struct elf_link_hash_entry *h; + PTR inf; +{ + 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) + { + asection *s = p->sec->output_section; + + if (s != NULL && (s->flags & SEC_READONLY) != 0) + { + struct bfd_link_info *info = (struct bfd_link_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 boolean +ppc64_elf_size_dynamic_sections (output_bfd, info) + bfd *output_bfd ATTRIBUTE_UNUSED; + struct bfd_link_info *info; +{ + struct ppc_link_hash_table *htab; + bfd *dynobj; + asection *s; + 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->shared) + { + 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) + { + bfd_signed_vma *local_got; + bfd_signed_vma *end_local_got; + bfd_size_type locsymcount; + Elf_Internal_Shdr *symtab_hdr; + asection *srel; + + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) + continue; + + 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 + { + srel = elf_section_data (p->sec)->sreloc; + srel->_raw_size += p->count * sizeof (Elf64_External_Rela); + } + } + } + + local_got = elf_local_got_refcounts (ibfd); + if (!local_got) + continue; + + symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; + locsymcount = symtab_hdr->sh_info; + end_local_got = local_got + locsymcount; + s = htab->sgot; + srel = htab->srelgot; + for (; local_got < end_local_got; ++local_got) + { + if (*local_got > 0) + { + *local_got = s->_raw_size; + s->_raw_size += 8; + if (info->shared) + srel->_raw_size += sizeof (Elf64_External_Rela); + } + else + *local_got = (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, (PTR) 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) + { + bfd_vma size; + + if ((s->flags & SEC_LINKER_CREATED) == 0) + continue; + + if (s == htab->splt + || s == htab->sgot + || s == htab->sstub + || s == htab->sglink) + { + /* 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->srelplt) + 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; + } + + /* 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 instead + of garbage. */ + size = s->_raw_size; + if (s == htab->sstub) + { + /* .stub may grow. Allocate enough for the maximum growth. */ + size += (size + 65536 + 65535) / 65536 * 4; + } + s->contents = (bfd_byte *) bfd_zalloc (dynobj, size); + if (s->contents == NULL) + return false; + } + + 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_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) + + if (!info->shared) + { + if (!add_dynamic_entry (DT_DEBUG, 0)) + return false; + } + + if (htab->splt->_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 (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. */ + elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, (PTR) info); + + if ((info->flags & DF_TEXTREL) != 0) + { + if (!add_dynamic_entry (DT_TEXTREL, 0)) + return false; + } + } + } +#undef add_dynamic_entry + + return true; +} + +/* Called after we have seen all the input files/sections, but before + final symbol resolution and section placement has been determined. + + We use this hook to provide a value for TOCstart, which we store in + the output bfd elf_gp. */ + +boolean +ppc64_elf_set_toc (obfd, info) + bfd *obfd; + struct bfd_link_info *info; +{ + if (!info->relocateable) + { + 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; + + elf_gp (obfd) = TOCstart; + } + return true; +} + +/* PowerPC64 .plt entries are 24 bytes long, which doesn't divide + evenly into 64k. Sometimes with a large enough .plt, we'll need to + use offsets differing in the high 16 bits when accessing a .plt + entry from a .plt call stub. This function adjusts the size of + .stub to accommodate the extra stub instruction needed in such + cases. */ + +boolean +ppc64_elf_size_stubs (obfd, info, changed) + bfd *obfd; + struct bfd_link_info *info; + int *changed; +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + bfd_vma plt_offset, next_64k; + long base, num, extra; + + /* .plt and .stub should be both present, or both absent. */ + if ((htab->splt == NULL || htab->splt->_raw_size == 0) + != (htab->sstub == NULL || htab->sstub->_raw_size == 0)) + abort (); + + /* If no .plt, then nothing to do. */ + if (htab->splt == NULL || htab->splt->_raw_size == 0) + return true; + + plt_offset = (htab->splt->output_section->vma + + htab->splt->output_offset + - elf_gp (obfd)); + next_64k = (plt_offset + 65535) & -65536; + + /* If the .plt doesn't have any entries crossing a 64k boundary, + then there is no need for bigger stubs. */ + if (next_64k <= plt_offset + htab->splt->_raw_size) + return true; + + /* OK, so we have at least one transition. Since .plt entries are + 24 bytes long, we'll strike it lucky every 3*64k, with the 64k + boundary between .plt entries. */ + base = next_64k / 65536; + num = (plt_offset + htab->splt->_raw_size - next_64k) / 65536; + extra = (base % 3 + num + 1) * 2 / 3; + + /* Allow one extra instruction for each EXTRA. The change in .stub + may change the location of .toc and .plt. .toc and .plt ought to + move as a group, but someone might be playing with eg. .plt + alignment, so don't allow .stub size to decrease. */ + if (htab->sstub->_cooked_size < htab->sstub->_raw_size + extra * 4) + { + htab->sstub->_cooked_size = htab->sstub->_raw_size + extra * 4; + *changed = true; + } + return true; +} + +/* Build a .plt call stub. */ + +static bfd_byte * +build_plt_stub (obfd, p, offset, glink) + bfd *obfd; + bfd_byte *p; + int offset; + int glink; +{ +#define PPC_LO(v) ((v) & 0xffff) +#define PPC_HI(v) (((v) >> 16) & 0xffff) +#define PPC_HA(v) PPC_HI ((v) + 0x8000) + + if (glink) + bfd_put_32 (obfd, LD_R2_40R1, p), p += 4; + bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; + if (!glink) + 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; +} + +/* Build the stubs for one function call. */ + +static boolean +build_one_stub (h, inf) + struct elf_link_hash_entry *h; + PTR inf; +{ + struct bfd_link_info *info; + struct ppc_link_hash_table *htab; + + if (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + return true; + + info = (struct bfd_link_info *) inf; + htab = ppc_hash_table (info); + + if (htab->elf.dynamic_sections_created + && h->plt.offset != (bfd_vma) -1 + && ((struct ppc_link_hash_entry *) h)->is_func_descriptor) + { + struct elf_link_hash_entry *fh; + asection *s; + bfd_vma plt_r2; + bfd_byte *p; + unsigned int indx; + + fh = elf_link_hash_lookup (&htab->elf, h->root.root.string - 1, + false, false, true); + + if (fh == NULL) + abort (); + + BFD_ASSERT (((struct ppc_link_hash_entry *) fh)->is_func); + + /* Build the .plt call stub. */ + plt_r2 = (htab->splt->output_section->vma + + htab->splt->output_offset + + h->plt.offset + - elf_gp (htab->splt->output_section->owner) + - TOC_BASE_OFF); + + if (plt_r2 + 0x80000000 > 0xffffffff + || (plt_r2 & 3) != 0) + { + (*_bfd_error_handler) + (_("linkage table error against `%s'"), + h->root.root.string); + bfd_set_error (bfd_error_bad_value); + htab->plt_overflow = true; + return false; + } + + s = htab->sstub; + /* Steal plt.offset to store the stub offset. */ + fh->plt.offset = s->_cooked_size; + p = s->contents + s->_cooked_size; + p = build_plt_stub (s->owner, p, (int) plt_r2, 0); + s->_cooked_size = p - s->contents; + + /* Build the .glink lazy link call stub. */ + s = htab->sglink; + p = s->contents + s->_cooked_size; + indx = s->reloc_count; + if (indx < 0x8000) + { + bfd_put_32 (s->owner, LI_R0_0 | indx, p); + p += 4; + } + else + { + bfd_put_32 (s->owner, LIS_R0_0 | PPC_HI (indx), p); + p += 4; + bfd_put_32 (s->owner, ORI_R0_R0_0 | PPC_LO (indx), p); + p += 4; + } + bfd_put_32 (s->owner, B_DOT | ((s->contents - p) & 0x3fffffc), p); + p += 4; + s->_cooked_size = p - s->contents; + s->reloc_count += 1; + } + return true; +} + +boolean +ppc64_elf_build_stubs (obfd, info) + bfd *obfd; + struct bfd_link_info *info; +{ + struct ppc_link_hash_table *htab = ppc_hash_table (info); + bfd_vma old_stub_size; + bfd_vma plt_r2; + bfd_byte *p; + + /* If no .plt stubs, then nothing to do. */ + if (htab->sstub == NULL || htab->sstub->_raw_size == 0) + return true; + + old_stub_size = htab->sstub->_cooked_size; + htab->sstub->_cooked_size = 0; + + /* Build the .glink plt call stub. */ + plt_r2 = (htab->splt->output_section->vma + + htab->splt->output_offset + - elf_gp (obfd) + - TOC_BASE_OFF); + p = htab->sglink->contents; + p = build_plt_stub (htab->sglink->owner, p, (int) plt_r2, 1); + while (p - htab->sglink->contents < GLINK_CALL_STUB_SIZE) + { + bfd_put_32 (htab->sglink->owner, NOP, p); + p += 4; + } + htab->sglink->_cooked_size = p - htab->sglink->contents; + + /* Use reloc_count to count entries. */ + htab->sglink->reloc_count = 0; + + elf_link_hash_traverse (&htab->elf, build_one_stub, (PTR) info); + htab->sglink->reloc_count = 0; + + if (htab->plt_overflow) + return false; + + if (old_stub_size != htab->sstub->_cooked_size + || htab->sglink->_raw_size != htab->sglink->_cooked_size) + { + (*_bfd_error_handler) + (_("stub section size doesn't match calculated size")); + bfd_set_error (bfd_error_bad_value); + return false; + } + return true; +} + +/* Set up any other section flags and such that may be necessary. */ + +static boolean +ppc64_elf_fake_sections (abfd, shdr, asect) + bfd *abfd ATTRIBUTE_UNUSED; + Elf64_Internal_Shdr *shdr; + asection *asect; +{ + if ((asect->flags & SEC_EXCLUDE) != 0) + shdr->sh_flags |= SHF_EXCLUDE; + + if ((asect->flags & SEC_SORT_ENTRIES) != 0) + shdr->sh_type = SHT_ORDERED; + + 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 + relocateable 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 relocateable 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 boolean +ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section, + contents, relocs, local_syms, local_sections) + 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; + bfd_vma *local_got_offsets; + bfd_vma TOCstart; + boolean ret = true; + boolean is_opd; + + /* Initialize howto table if needed. */ + if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) + ppc_howto_init (); + + htab = ppc_hash_table (info); + local_got_offsets = elf_local_got_offsets (input_bfd); + TOCstart = elf_gp (output_bfd); + symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + is_opd = strcmp (bfd_get_section_name (abfd, input_section), ".opd") == 0; + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + enum elf_ppc_reloc_type r_type; + bfd_vma offset; + bfd_vma addend; + bfd_reloc_status_type r; + Elf_Internal_Sym *sym; + asection *sec; + struct elf_link_hash_entry *h; + const char *sym_name; + unsigned long r_symndx; + bfd_vma relocation; + boolean unresolved_reloc; + boolean has_nop; + long insn; + + r_type = (enum elf_ppc_reloc_type) ELF64_R_TYPE (rel->r_info); + r_symndx = ELF64_R_SYM (rel->r_info); + + if (info->relocateable) + { + /* This is a relocatable link. We don't have to change + anything, unless the reloc is against a section symbol, + in which case we have to adjust according to where the + section symbol winds up in the output section. */ + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + if ((unsigned) ELF_ST_TYPE (sym->st_info) == STT_SECTION) + { + sec = local_sections[r_symndx]; + rel->r_addend += sec->output_offset + sym->st_value; + } + } + continue; + } + + /* This is a final link. */ + + offset = rel->r_offset; + addend = rel->r_addend; + r = bfd_reloc_other; + sym = (Elf_Internal_Sym *) 0; + sec = (asection *) 0; + h = (struct elf_link_hash_entry *) 0; + sym_name = (const char *) 0; + unresolved_reloc = false; + + if (r_type == R_PPC64_TOC) + { + /* Relocation value is TOC base. Symbol is ignored. */ + relocation = TOCstart + TOC_BASE_OFF; + } + else if (r_symndx < symtab_hdr->sh_info) + { + /* It's a local symbol. */ + sym = local_syms + r_symndx; + sec = local_sections[r_symndx]; + sym_name = "<local symbol>"; + + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); + addend = rel->r_addend; + } + else + { + /* It's a global symbol. */ + 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; + sym_name = h->root.root.string; + relocation = 0; + if (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + { + sec = h->root.u.def.section; + if (sec->output_section == NULL) + /* Set a flag that will be cleared later if we find a + relocation value for this symbol. output_section + is typically NULL for symbols satisfied by a shared + library. */ + unresolved_reloc = true; + else + relocation = (h->root.u.def.value + + sec->output_section->vma + + sec->output_offset); + } + else if (h->root.type == bfd_link_hash_undefweak) + ; + else if (info->shared + && (!info->symbolic || info->allow_shlib_undefined) + && !info->no_undefined + && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) + ; + else + { + if (! ((*info->callbacks->undefined_symbol) + (info, h->root.root.string, input_bfd, input_section, + offset, (!info->shared + || info->no_undefined + || ELF_ST_VISIBILITY (h->other))))) + return false; + } + } + + /* First handle 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; /* Set '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 + offset) & ~(0x01 << 21); + /* 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; + + bfd_put_32 (output_bfd, (bfd_vma) insn, contents + offset); + break; + + case R_PPC64_REL24: + case R_PPC64_ADDR24: + /* An ADDR24 or REL24 branching to a linkage function may be + followed by a nop that we have to replace with a ld in + order to restore the TOC base pointer. Only calls to + shared objects need to alter the TOC base. These are + recognized by their need for a PLT entry. */ + has_nop = 0; + if (h != NULL + && h->plt.offset != (bfd_vma) -1 + && htab->sstub != NULL) + { + /* plt.offset here is the offset into the stub section. */ + relocation = (htab->sstub->output_section->vma + + htab->sstub->output_offset + + h->plt.offset); + unresolved_reloc = false; + + /* Make sure that there really is an instruction after + the branch that we can decode. */ + if (offset + 8 <= input_section->_cooked_size) + { + bfd_byte *pnext; + + pnext = contents + offset + 4; + insn = bfd_get_32 (input_bfd, pnext); + + if (insn == 0x60000000 /* nop (ori r0,r0,0) */ + || insn == 0x4def7b82 /* cror 15,15,15 */ + || insn == 0x4ffffb82) /* cror 31,31,31 */ + { + bfd_put_32 (input_bfd, + (bfd_vma) 0xe8410028, /* ld r2,40(r1) */ + pnext); + has_nop = 1; + } + } + } + + if (h != NULL + && h->root.type == bfd_link_hash_undefweak + && r_type == R_PPC64_REL24 + && addend == 0 + && relocation == 0) + { + /* Tweak calls to undefined weak functions to behave as + if the "called" function immediately returns. We can + thus call to a weak function without first checking + whether the function is defined. */ + relocation = 4; + if (has_nop) + relocation = 8; + } + break; + } + + /* Set `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_PPC_GNU_VTINHERIT: + case R_PPC_GNU_VTENTRY: + continue; + + /* GOT16 relocations. Like an ADDR16 using the symbol's + address in the GOT as relocation value instead of the + symbols value itself. Also, create a GOT entry for the + symbol and put the symbol value there. */ + 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: + { + /* Relocation is to the entry for this symbol in the global + offset table. */ + bfd_vma off; + + if (htab->sgot == NULL) + abort (); + + if (h != NULL) + { + boolean dyn; + + off = h->got.offset; + dyn = htab->elf.dynamic_sections_created; + if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) + || (info->shared + && (info->symbolic + || h->dynindx == -1 + || (h->elf_link_hash_flags + & ELF_LINK_FORCED_LOCAL)) + && (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR))) + { + /* 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. We must initialize + this entry in the global offset table. Since the + offset must always be a multiple of 8, we use the + least significant bit to record whether we have + initialized it already. + + When doing a dynamic link, we create a .rel.got + relocation entry to initialize the value. This + is done in the finish_dynamic_symbol routine. */ + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_put_64 (output_bfd, relocation, + htab->sgot->contents + off); + h->got.offset |= 1; + } + } + else + unresolved_reloc = false; + } + else + { + if (local_got_offsets == NULL) + abort (); + + off = local_got_offsets[r_symndx]; + + /* The offset must always be a multiple of 8. We use + the least significant bit to record whether we have + already processed this entry. */ + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_put_64 (output_bfd, relocation, + htab->sgot->contents + off); + + if (info->shared) + { + Elf_Internal_Rela outrel; + Elf64_External_Rela *loc; + + /* We need to generate a R_PPC64_RELATIVE reloc + for the dynamic linker. */ + outrel.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + + off); + outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + outrel.r_addend = relocation; + loc = (Elf64_External_Rela *) htab->srelgot->contents; + loc += htab->srelgot->reloc_count++; + bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); + } + + local_got_offsets[r_symndx] |= 1; + } + } + + if (off >= (bfd_vma) -2) + abort (); + + relocation = htab->sgot->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; + + if (h->plt.offset == (bfd_vma) -1 + || htab->splt == NULL) + { + /* We didn't make a PLT entry for this symbol. This + happens when statically linking PIC code, or when + using -Bsymbolic. */ + break; + } + + relocation = (htab->splt->output_section->vma + + htab->splt->output_offset + + h->plt.offset); + unresolved_reloc = false; + break; + + /* 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 + TOC_BASE_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 != (asection *) 0) + addend -= sec->output_section->vma; + break; + + case R_PPC64_REL24: + break; + + /* Relocations that may need to be propagated if this is a + dynamic object. */ + case R_PPC64_REL14: + case R_PPC64_REL14_BRNTAKEN: + case R_PPC64_REL14_BRTAKEN: + 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_ADDR30: + 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. */ + if (r_symndx == 0) + break; + /* Fall thru. */ + + case R_PPC64_TOC: + if ((input_section->flags & SEC_ALLOC) == 0) + break; + + if (NO_OPD_RELOCS && is_opd) + break; + + if ((info->shared + && (IS_ABSOLUTE_RELOC (r_type) + || (h != NULL + && h->dynindx != -1 + && (! info->symbolic + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)))) + || (!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) + || h->root.type == bfd_link_hash_undefweak + || h->root.type == bfd_link_hash_undefined))) + { + Elf_Internal_Rela outrel; + boolean skip, relocate; + asection *sreloc; + Elf64_External_Rela *loc; + + /* When generating a dynamic object, these relocations + are copied into the output file to be resolved at run + time. */ + + skip = false; + + outrel.r_offset = + _bfd_elf_section_offset (output_bfd, info, input_section, + rel->r_offset); + if (outrel.r_offset == (bfd_vma) -1) + skip = true; + + outrel.r_offset += (input_section->output_section->vma + + input_section->output_offset); + outrel.r_addend = addend; + + if (skip) + { + relocate = false; + memset (&outrel, 0, sizeof outrel); + } + else if (h != NULL + && h->dynindx != -1 + && !is_opd + && (!IS_ABSOLUTE_RELOC (r_type) + || !info->shared + || !info->symbolic + || (h->elf_link_hash_flags + & ELF_LINK_HASH_DEF_REGULAR) == 0)) + { + relocate = false; + 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; + relocate = true; + if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) + { + outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + } + 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 = (Elf64_External_Rela *) sreloc->contents; + loc += sreloc->reloc_count++; + 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. */ + if (! relocate) + continue; + } + 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 thru */ + + 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[(int) 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_PLT16_HA: + case R_PPC64_TOC16_HA: + case R_PPC64_SECTOFF_HA: + /* 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. */ + addend += ((relocation + addend) & 0x8000) << 1; + 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: + if (((relocation + addend) & 3) != 0) + { + (*_bfd_error_handler) + (_("%s: error: relocation %s not a multiple of 4"), + bfd_archive_filename (input_bfd), + ppc64_elf_howto_table[(int) r_type]->name); + bfd_set_error (bfd_error_bad_value); + ret = false; + continue; + } + break; + } + + /* FIXME: Why do we allow debugging sections to escape this error? + More importantly, why do we not emit dynamic relocs above in + debugging sections (which are ! SEC_ALLOC)? If we had + emitted the dynamic reloc, we could remove the fudge here. */ + if (unresolved_reloc + && !(info->shared + && (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 relocation against symbol `%s'"), + bfd_archive_filename (input_bfd), + bfd_get_section_name (input_bfd, input_section), + (long) rel->r_offset, + h->root.root.string); + + r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], + input_bfd, + input_section, + contents, + offset, + relocation, + addend); + + if (r == bfd_reloc_ok) + ; + else if (r == bfd_reloc_overflow) + { + const char *name; + + if (h != NULL) + { + if (h->root.type == bfd_link_hash_undefweak + && ppc64_elf_howto_table[(int) 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; + } + + name = h->root.root.string; + } + else + { + name = bfd_elf_string_from_elf_section (input_bfd, + symtab_hdr->sh_link, + sym->st_name); + if (name == NULL) + continue; + if (*name == '\0') + name = bfd_section_name (input_bfd, sec); + } + + if (! ((*info->callbacks->reloc_overflow) + (info, name, ppc64_elf_howto_table[(int) r_type]->name, + (bfd_vma) 0, input_bfd, input_section, offset))) + return false; + } + else + ret = false; + } + + return ret; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static boolean +ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) + 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 (h->plt.offset != (bfd_vma) -1 + && ((struct ppc_link_hash_entry *) h)->is_func_descriptor) + { + Elf_Internal_Rela rela; + Elf64_External_Rela *loc; + + /* This symbol has an entry in the procedure linkage table. Set + it up. */ + + if (htab->splt == NULL + || htab->srelplt == NULL + || htab->sglink == NULL) + abort (); + + /* Create a JMP_SLOT reloc to inform the dynamic linker to + fill in the PLT entry. */ + + rela.r_offset = (htab->splt->output_section->vma + + htab->splt->output_offset + + h->plt.offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); + rela.r_addend = 0; + + loc = (Elf64_External_Rela *) htab->srelplt->contents; + loc += (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE; + bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); + } + + if (h->got.offset != (bfd_vma) -1) + { + Elf_Internal_Rela rela; + Elf64_External_Rela *loc; + + /* This symbol has an entry in the global offset table. Set it + up. */ + + if (htab->sgot == NULL || htab->srelgot == NULL) + abort (); + + rela.r_offset = (htab->sgot->output_section->vma + + htab->sgot->output_offset + + (h->got.offset &~ (bfd_vma) 1)); + + /* If this is a static link, or it is a -Bsymbolic link and the + symbol is defined locally or was forced to be local because + of a version file, we just want to emit a RELATIVE reloc. + The entry in the global offset table will already have been + initialized in the relocate_section function. */ + if (info->shared + && (info->symbolic + || h->dynindx == -1 + || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) + && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + { + BFD_ASSERT((h->got.offset & 1) != 0); + rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); + rela.r_addend = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + } + else + { + BFD_ASSERT ((h->got.offset & 1) == 0); + bfd_put_64 (output_bfd, (bfd_vma) 0, + htab->sgot->contents + h->got.offset); + rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_GLOB_DAT); + rela.r_addend = 0; + } + + loc = (Elf64_External_Rela *) htab->srelgot->contents; + loc += htab->srelgot->reloc_count++; + 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; + Elf64_External_Rela *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->srelbss == 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 = (Elf64_External_Rela *) htab->srelbss->contents; + loc += htab->srelbss->reloc_count++; + 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 (rela) + const Elf_Internal_Rela *rela; +{ + enum elf_ppc_reloc_type r_type; + + r_type = (enum elf_ppc_reloc_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 boolean +ppc64_elf_finish_dynamic_sections (output_bfd, info) + 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->sgot == 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; + + bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + continue; + + case DT_PPC64_GLINK: + dyn.d_un.d_ptr = (htab->sglink->output_section->vma + + htab->sglink->output_offset); + break; + + case DT_PLTGOT: + dyn.d_un.d_ptr = (htab->splt->output_section->vma + + htab->splt->output_offset); + break; + + case DT_JMPREL: + dyn.d_un.d_ptr = (htab->srelplt->output_section->vma + + htab->srelplt->output_offset); + break; + + case DT_PLTRELSZ: + dyn.d_un.d_val = htab->srelplt->_raw_size; + break; + + case DT_RELASZ: + /* Don't count procedure linkage table relocs in the + overall reloc count. */ + if (htab->srelplt != NULL) + dyn.d_un.d_val -= htab->srelplt->_raw_size; + break; + } + + bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); + } + } + + if (htab->sgot != NULL && htab->sgot->_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->sgot->contents); + + /* Set .got entry size. */ + elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8; + } + + if (htab->splt != NULL && htab->splt->_raw_size != 0) + { + /* Set .plt entry size. */ + elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize + = PLT_ENTRY_SIZE; + } + + return true; +} + +#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 + +#ifdef EM_CYGNUS_POWERPC +#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC +#endif + +#ifdef EM_PPC_OLD +#define ELF_MACHINE_ALT2 EM_PPC_OLD +#endif + +#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_plt_header_size PLT_INITIAL_ENTRY_SIZE +#define elf_backend_can_gc_sections 1 +#define elf_backend_can_refcount 1 + +#define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup +#define bfd_elf64_bfd_set_private_flags ppc64_elf_set_private_flags +#define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data +#define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create + +#define elf_backend_section_from_shdr ppc64_elf_section_from_shdr +#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_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_fake_sections ppc64_elf_fake_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 + +#include "elf64-target.h" |
