diff options
Diffstat (limited to 'contrib/binutils/bfd/elf32-arm.c')
| -rw-r--r-- | contrib/binutils/bfd/elf32-arm.c | 8376 |
1 files changed, 8376 insertions, 0 deletions
diff --git a/contrib/binutils/bfd/elf32-arm.c b/contrib/binutils/bfd/elf32-arm.c new file mode 100644 index 0000000..4c65de1 --- /dev/null +++ b/contrib/binutils/bfd/elf32-arm.c @@ -0,0 +1,8376 @@ +/* 32-bit ELF support for ARM + Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 + Free Software Foundation, Inc. + + 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libiberty.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf-vxworks.h" +#include "elf/arm.h" + +#ifndef NUM_ELEM +#define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0])) +#endif + +/* Return the relocation section associated with NAME. HTAB is the + bfd's elf32_arm_link_hash_entry. */ +#define RELOC_SECTION(HTAB, NAME) \ + ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME) + +/* Return size of a relocation entry. HTAB is the bfd's + elf32_arm_link_hash_entry. */ +#define RELOC_SIZE(HTAB) \ + ((HTAB)->use_rel \ + ? sizeof (Elf32_External_Rel) \ + : sizeof (Elf32_External_Rela)) + +/* Return function to swap relocations in. HTAB is the bfd's + elf32_arm_link_hash_entry. */ +#define SWAP_RELOC_IN(HTAB) \ + ((HTAB)->use_rel \ + ? bfd_elf32_swap_reloc_in \ + : bfd_elf32_swap_reloca_in) + +/* Return function to swap relocations out. HTAB is the bfd's + elf32_arm_link_hash_entry. */ +#define SWAP_RELOC_OUT(HTAB) \ + ((HTAB)->use_rel \ + ? bfd_elf32_swap_reloc_out \ + : bfd_elf32_swap_reloca_out) + +#define elf_info_to_howto 0 +#define elf_info_to_howto_rel elf32_arm_info_to_howto + +#define ARM_ELF_ABI_VERSION 0 +#ifdef __FreeBSD__ +#define ARM_ELF_OS_ABI_VERSION ELFOSABI_FREEBSD +#else +#define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM +#endif + +static const struct elf_backend_data elf32_arm_vxworks_bed; + +/* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g. + R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO + in that slot. */ + +static reloc_howto_type elf32_arm_howto_table_1[] = +{ + /* No relocation */ + HOWTO (R_ARM_NONE, /* 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_ARM_NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_PC24, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_PC24", /* name */ + FALSE, /* partial_inplace */ + 0x00ffffff, /* src_mask */ + 0x00ffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 32 bit absolute */ + HOWTO (R_ARM_ABS32, /* 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_ARM_ABS32", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* standard 32bit pc-relative reloc */ + HOWTO (R_ARM_REL32, /* 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_ARM_REL32", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */ + HOWTO (R_ARM_PC13, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_PC13", /* name */ + FALSE, /* partial_inplace */ + 0x000000ff, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit absolute */ + HOWTO (R_ARM_ABS16, /* 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_ARM_ABS16", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 12 bit absolute */ + HOWTO (R_ARM_ABS12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ABS12", /* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_ABS5, /* type */ + 6, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 5, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_ABS5", /* name */ + FALSE, /* partial_inplace */ + 0x000007e0, /* src_mask */ + 0x000007e0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 8 bit absolute */ + HOWTO (R_ARM_ABS8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ABS8", /* name */ + FALSE, /* partial_inplace */ + 0x000000ff, /* src_mask */ + 0x000000ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_SBREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_SBREL32", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* FIXME: Has two more bits of offset in Thumb32. */ + HOWTO (R_ARM_THM_CALL, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 23, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_CALL", /* name */ + FALSE, /* partial_inplace */ + 0x07ff07ff, /* src_mask */ + 0x07ff07ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_PC8, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_PC8", /* name */ + FALSE, /* partial_inplace */ + 0x000000ff, /* src_mask */ + 0x000000ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_BREL_ADJ, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_BREL_ADJ", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_SWI24, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_SWI24", /* name */ + FALSE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x00000000, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_SWI8, /* type */ + 0, /* rightshift */ + 0, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_SWI8", /* name */ + FALSE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x00000000, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* BLX instruction for the ARM. */ + HOWTO (R_ARM_XPC25, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 25, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_XPC25", /* name */ + FALSE, /* partial_inplace */ + 0x00ffffff, /* src_mask */ + 0x00ffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* BLX instruction for the Thumb. */ + HOWTO (R_ARM_THM_XPC22, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 22, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_XPC22", /* name */ + FALSE, /* partial_inplace */ + 0x07ff07ff, /* src_mask */ + 0x07ff07ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* Dynamic TLS relocations. */ + + HOWTO (R_ARM_TLS_DTPMOD32, /* 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_ARM_TLS_DTPMOD32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_DTPOFF32, /* 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_ARM_TLS_DTPOFF32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_TPOFF32, /* 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_ARM_TLS_TPOFF32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Relocs used in ARM Linux */ + + HOWTO (R_ARM_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_ARM_COPY", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_GLOB_DAT, /* 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_ARM_GLOB_DAT", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_JUMP_SLOT, /* 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_ARM_JUMP_SLOT", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_RELATIVE, /* 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_ARM_RELATIVE", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_GOTOFF32, /* 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_ARM_GOTOFF32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_GOTPC, /* 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_ARM_GOTPC", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_GOT32, /* 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_ARM_GOT32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_PLT32, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_PLT32", /* name */ + FALSE, /* partial_inplace */ + 0x00ffffff, /* src_mask */ + 0x00ffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_CALL, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_CALL", /* name */ + FALSE, /* partial_inplace */ + 0x00ffffff, /* src_mask */ + 0x00ffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_JUMP24, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_JUMP24", /* name */ + FALSE, /* partial_inplace */ + 0x00ffffff, /* src_mask */ + 0x00ffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_JUMP24, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 24, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_JUMP24", /* name */ + FALSE, /* partial_inplace */ + 0x07ff2fff, /* src_mask */ + 0x07ff2fff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_BASE_ABS, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_BASE_ABS", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_ALU_PCREL7_0, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ALU_PCREL_7_0", /* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_ALU_PCREL15_8, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + TRUE, /* pc_relative */ + 8, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ALU_PCREL_15_8",/* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_ALU_PCREL23_15, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + TRUE, /* pc_relative */ + 16, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ALU_PCREL_23_15",/* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_LDR_SBREL_11_0, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_LDR_SBREL_11_0",/* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_ALU_SBREL_19_12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 12, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ALU_SBREL_19_12",/* name */ + FALSE, /* partial_inplace */ + 0x000ff000, /* src_mask */ + 0x000ff000, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_ALU_SBREL_27_20, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + FALSE, /* pc_relative */ + 20, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ALU_SBREL_27_20",/* name */ + FALSE, /* partial_inplace */ + 0x0ff00000, /* src_mask */ + 0x0ff00000, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TARGET1, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_TARGET1", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_ROSEGREL32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ROSEGREL32", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_V4BX, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_V4BX", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TARGET2, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_TARGET2", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_PREL31, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 31, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_PREL31", /* name */ + FALSE, /* partial_inplace */ + 0x7fffffff, /* src_mask */ + 0x7fffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_MOVW_ABS_NC, /* type */ + 0, /* rightshift */ + 2, /* 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_ARM_MOVW_ABS_NC", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_MOVT_ABS, /* 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_ARM_MOVT_ABS", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_MOVW_PREL_NC, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_MOVW_PREL_NC", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_MOVT_PREL, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_MOVT_PREL", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */ + 0, /* rightshift */ + 2, /* 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_ARM_THM_MOVW_ABS_NC",/* name */ + FALSE, /* partial_inplace */ + 0x040f70ff, /* src_mask */ + 0x040f70ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_MOVT_ABS, /* 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_ARM_THM_MOVT_ABS", /* name */ + FALSE, /* partial_inplace */ + 0x040f70ff, /* src_mask */ + 0x040f70ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_MOVW_PREL_NC",/* name */ + FALSE, /* partial_inplace */ + 0x040f70ff, /* src_mask */ + 0x040f70ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_MOVT_PREL, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_MOVT_PREL", /* name */ + FALSE, /* partial_inplace */ + 0x040f70ff, /* src_mask */ + 0x040f70ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_JUMP19, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 19, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_JUMP19", /* name */ + FALSE, /* partial_inplace */ + 0x043f2fff, /* src_mask */ + 0x043f2fff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_JUMP6, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 6, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_unsigned,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_JUMP6", /* name */ + FALSE, /* partial_inplace */ + 0x02f8, /* src_mask */ + 0x02f8, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* These are declared as 13-bit signed relocations because we can + address -4095 .. 4095(base) by altering ADDW to SUBW or vice + versa. */ + HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 13, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_ALU_PREL_11_0",/* name */ + FALSE, /* partial_inplace */ + 0x040070ff, /* src_mask */ + 0x040070ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_PC12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 13, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_PC12", /* name */ + FALSE, /* partial_inplace */ + 0x040070ff, /* src_mask */ + 0x040070ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_ABS32_NOI, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_ABS32_NOI", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_REL32_NOI, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_REL32_NOI", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ +}; + +/* Relocations 57 .. 83 are the "group relocations" which we do not + support. */ + +static reloc_howto_type elf32_arm_howto_table_2[] = +{ + HOWTO (R_ARM_MOVW_BREL_NC, /* type */ + 0, /* rightshift */ + 2, /* 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_ARM_MOVW_BREL_NC", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_MOVT_BREL, /* 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_ARM_MOVT_BREL", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_MOVW_BREL, /* type */ + 0, /* rightshift */ + 2, /* 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_ARM_MOVW_BREL", /* name */ + FALSE, /* partial_inplace */ + 0x0000ffff, /* src_mask */ + 0x0000ffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */ + 0, /* rightshift */ + 2, /* 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_ARM_THM_MOVW_BREL_NC",/* name */ + FALSE, /* partial_inplace */ + 0x040f70ff, /* src_mask */ + 0x040f70ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_MOVT_BREL, /* 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_ARM_THM_MOVT_BREL", /* name */ + FALSE, /* partial_inplace */ + 0x040f70ff, /* src_mask */ + 0x040f70ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_MOVW_BREL, /* type */ + 0, /* rightshift */ + 2, /* 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_ARM_THM_MOVW_BREL", /* name */ + FALSE, /* partial_inplace */ + 0x040f70ff, /* src_mask */ + 0x040f70ff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + EMPTY_HOWTO (90), /* unallocated */ + EMPTY_HOWTO (91), + EMPTY_HOWTO (92), + EMPTY_HOWTO (93), + + HOWTO (R_ARM_PLT32_ABS, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_PLT32_ABS", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_GOT_ABS, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_GOT_ABS", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_GOT_PREL, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_GOT_PREL", /* name */ + FALSE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_GOT_BREL12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_GOT_BREL12", /* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_GOTOFF12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_GOTOFF12", /* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */ + + /* GNU extension to record C++ vtable member usage */ + HOWTO (R_ARM_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + _bfd_elf_rel_vtable_reloc_fn, /* special_function */ + "R_ARM_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* GNU extension to record C++ vtable hierarchy */ + HOWTO (R_ARM_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_ARM_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_JUMP11, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 11, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_JUMP11", /* name */ + FALSE, /* partial_inplace */ + 0x000007ff, /* src_mask */ + 0x000007ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + HOWTO (R_ARM_THM_JUMP8, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + TRUE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_THM_JUMP8", /* name */ + FALSE, /* partial_inplace */ + 0x000000ff, /* src_mask */ + 0x000000ff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* TLS relocations */ + HOWTO (R_ARM_TLS_GD32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + NULL, /* special_function */ + "R_ARM_TLS_GD32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_LDM32, /* 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_ARM_TLS_LDM32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_LDO32, /* 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_ARM_TLS_LDO32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_IE32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + NULL, /* special_function */ + "R_ARM_TLS_IE32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_LE32, /* 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_ARM_TLS_LE32", /* name */ + TRUE, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_LDO12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_TLS_LDO12", /* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_LE12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_TLS_LE12", /* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_TLS_IE12GP, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield,/* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_ARM_TLS_IE12GP", /* name */ + FALSE, /* partial_inplace */ + 0x00000fff, /* src_mask */ + 0x00000fff, /* dst_mask */ + FALSE), /* pcrel_offset */ +}; + +/* 112-127 private relocations + 128 R_ARM_ME_TOO, obsolete + 129-255 unallocated in AAELF. + + 249-255 extended, currently unused, relocations: */ + +static reloc_howto_type elf32_arm_howto_table_3[4] = +{ + HOWTO (R_ARM_RREL32, /* 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_ARM_RREL32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_RABS32, /* 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_ARM_RABS32", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_RPC24, /* 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_ARM_RPC24", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + HOWTO (R_ARM_RBASE, /* 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_ARM_RBASE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE) /* pcrel_offset */ +}; + +static reloc_howto_type * +elf32_arm_howto_from_type (unsigned int r_type) +{ + if (r_type < NUM_ELEM (elf32_arm_howto_table_1)) + return &elf32_arm_howto_table_1[r_type]; + + if (r_type >= R_ARM_MOVW_BREL_NC + && r_type < R_ARM_MOVW_BREL_NC + NUM_ELEM (elf32_arm_howto_table_2)) + return &elf32_arm_howto_table_2[r_type - R_ARM_MOVW_BREL_NC]; + + if (r_type >= R_ARM_RREL32 + && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2)) + return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32]; + + return NULL; +} + +static void +elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc, + Elf_Internal_Rela * elf_reloc) +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (elf_reloc->r_info); + bfd_reloc->howto = elf32_arm_howto_from_type (r_type); +} + +struct elf32_arm_reloc_map + { + bfd_reloc_code_real_type bfd_reloc_val; + unsigned char elf_reloc_val; + }; + +/* All entries in this list must also be present in elf32_arm_howto_table. */ +static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = + { + {BFD_RELOC_NONE, R_ARM_NONE}, + {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24}, + {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL}, + {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24}, + {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25}, + {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22}, + {BFD_RELOC_32, R_ARM_ABS32}, + {BFD_RELOC_32_PCREL, R_ARM_REL32}, + {BFD_RELOC_8, R_ARM_ABS8}, + {BFD_RELOC_16, R_ARM_ABS16}, + {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12}, + {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5}, + {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24}, + {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL}, + {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11}, + {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19}, + {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8}, + {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6}, + {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT}, + {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT}, + {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE}, + {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32}, + {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC}, + {BFD_RELOC_ARM_GOT32, R_ARM_GOT32}, + {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, + {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1}, + {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32}, + {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32}, + {BFD_RELOC_ARM_PREL31, R_ARM_PREL31}, + {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}, + {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, + {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32}, + {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32}, + {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32}, + {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32}, + {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32}, + {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32}, + {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32}, + {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32}, + {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT}, + {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY}, + }; + +static reloc_howto_type * +elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) +{ + unsigned int i; + for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++) + if (elf32_arm_reloc_map[i].bfd_reloc_val == code) + return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val); + + return NULL; +} + +/* Support for core dump NOTE sections */ +static bfd_boolean +elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) +{ + int offset; + size_t size; + + switch (note->descsz) + { + default: + return FALSE; + + case 148: /* Linux/ARM 32-bit*/ + /* pr_cursig */ + elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); + + /* pr_pid */ + elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); + + /* pr_reg */ + offset = 72; + size = 72; + + break; + + case 96: /* FreeBSD/ARM */ + /* pr_cursig */ + if (elf_tdata(abfd)->core_signal == 0) + elf_tdata (abfd)->core_signal = ((int *)(note->descdata))[5]; + + /* pr_pid */ + elf_tdata (abfd)->core_pid = ((int *)(note->descdata))[6]; + + /* pr_reg */ + offset = 28; + size = 68; + break; + } + + /* Make a ".reg/999" section. */ + return _bfd_elfcore_make_pseudosection (abfd, ".reg", + size, note->descpos + offset); +} + +static bfd_boolean +elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) +{ + switch (note->descsz) + { + default: + return FALSE; + + case 124: /* Linux/ARM elf_prpsinfo */ + elf_tdata (abfd)->core_program + = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); + elf_tdata (abfd)->core_command + = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); + } + + /* Note that for some reason, a spurious space is tacked + onto the end of the args in some (at least one anyway) + implementations, so strip it off if it exists. */ + + { + char *command = elf_tdata (abfd)->core_command; + int n = strlen (command); + + if (0 < n && command[n - 1] == ' ') + command[n - 1] = '\0'; + } + + return TRUE; +} + +#define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec +#define TARGET_LITTLE_NAME "elf32-littlearm" +#define TARGET_BIG_SYM bfd_elf32_bigarm_vec +#define TARGET_BIG_NAME "elf32-bigarm" + +#define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus +#define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo + +typedef unsigned long int insn32; +typedef unsigned short int insn16; + +/* In lieu of proper flags, assume all EABIv4 or later objects are + interworkable. */ +#define INTERWORK_FLAG(abfd) \ + (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \ + || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)) + +/* The linker script knows the section names for placement. + The entry_names are used to do simple name mangling on the stubs. + Given a function name, and its type, the stub can be found. The + name can be changed. The only requirement is the %s be present. */ +#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" +#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" + +#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" +#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" + +#ifdef FOUR_WORD_PLT + +/* The first entry in a procedure linkage table looks like + this. It is set up so that any shared library function that is + called before the relocation has been set up calls the dynamic + linker first. */ +static const bfd_vma elf32_arm_plt0_entry [] = + { + 0xe52de004, /* str lr, [sp, #-4]! */ + 0xe59fe010, /* ldr lr, [pc, #16] */ + 0xe08fe00e, /* add lr, pc, lr */ + 0xe5bef008, /* ldr pc, [lr, #8]! */ + }; + +/* Subsequent entries in a procedure linkage table look like + this. */ +static const bfd_vma elf32_arm_plt_entry [] = + { + 0xe28fc600, /* add ip, pc, #NN */ + 0xe28cca00, /* add ip, ip, #NN */ + 0xe5bcf000, /* ldr pc, [ip, #NN]! */ + 0x00000000, /* unused */ + }; + +#else + +/* The first entry in a procedure linkage table looks like + this. It is set up so that any shared library function that is + called before the relocation has been set up calls the dynamic + linker first. */ +static const bfd_vma elf32_arm_plt0_entry [] = + { + 0xe52de004, /* str lr, [sp, #-4]! */ + 0xe59fe004, /* ldr lr, [pc, #4] */ + 0xe08fe00e, /* add lr, pc, lr */ + 0xe5bef008, /* ldr pc, [lr, #8]! */ + 0x00000000, /* &GOT[0] - . */ + }; + +/* Subsequent entries in a procedure linkage table look like + this. */ +static const bfd_vma elf32_arm_plt_entry [] = + { + 0xe28fc600, /* add ip, pc, #0xNN00000 */ + 0xe28cca00, /* add ip, ip, #0xNN000 */ + 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */ + }; + +#endif + +/* The format of the first entry in the procedure linkage table + for a VxWorks executable. */ +static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] = + { + 0xe52dc008, /* str ip,[sp,#-8]! */ + 0xe59fc000, /* ldr ip,[pc] */ + 0xe59cf008, /* ldr pc,[ip,#8] */ + 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */ + }; + +/* The format of subsequent entries in a VxWorks executable. */ +static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] = + { + 0xe59fc000, /* ldr ip,[pc] */ + 0xe59cf000, /* ldr pc,[ip] */ + 0x00000000, /* .long @got */ + 0xe59fc000, /* ldr ip,[pc] */ + 0xea000000, /* b _PLT */ + 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */ + }; + +/* The format of entries in a VxWorks shared library. */ +static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] = + { + 0xe59fc000, /* ldr ip,[pc] */ + 0xe79cf009, /* ldr pc,[ip,r9] */ + 0x00000000, /* .long @got */ + 0xe59fc000, /* ldr ip,[pc] */ + 0xe599f008, /* ldr pc,[r9,#8] */ + 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */ + }; + +/* An initial stub used if the PLT entry is referenced from Thumb code. */ +#define PLT_THUMB_STUB_SIZE 4 +static const bfd_vma elf32_arm_plt_thumb_stub [] = + { + 0x4778, /* bx pc */ + 0x46c0 /* nop */ + }; + +/* The entries in a PLT when using a DLL-based target with multiple + address spaces. */ +static const bfd_vma elf32_arm_symbian_plt_entry [] = + { + 0xe51ff004, /* ldr pc, [pc, #-4] */ + 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */ + }; + +/* Used to build a map of a section. This is required for mixed-endian + code/data. */ + +typedef struct elf32_elf_section_map +{ + bfd_vma vma; + char type; +} +elf32_arm_section_map; + +typedef struct _arm_elf_section_data +{ + struct bfd_elf_section_data elf; + unsigned int mapcount; + elf32_arm_section_map *map; +} +_arm_elf_section_data; + +#define elf32_arm_section_data(sec) \ + ((_arm_elf_section_data *) elf_section_data (sec)) + +/* The size of the thread control block. */ +#define TCB_SIZE 8 + +#define NUM_KNOWN_ATTRIBUTES 32 + +typedef struct aeabi_attribute +{ + int type; + unsigned int i; + char *s; +} aeabi_attribute; + +typedef struct aeabi_attribute_list +{ + struct aeabi_attribute_list *next; + int tag; + aeabi_attribute attr; +} aeabi_attribute_list; + +struct elf32_arm_obj_tdata +{ + struct elf_obj_tdata root; + + /* tls_type for each local got entry. */ + char *local_got_tls_type; + + aeabi_attribute known_eabi_attributes[NUM_KNOWN_ATTRIBUTES]; + aeabi_attribute_list *other_eabi_attributes; +}; + +#define elf32_arm_tdata(abfd) \ + ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any) + +#define elf32_arm_local_got_tls_type(abfd) \ + (elf32_arm_tdata (abfd)->local_got_tls_type) + +static bfd_boolean +elf32_arm_mkobject (bfd *abfd) +{ + bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata); + abfd->tdata.any = bfd_zalloc (abfd, amt); + if (abfd->tdata.any == NULL) + return FALSE; + return TRUE; +} + +/* The ARM linker needs to keep track of the number of relocs that it + decides to copy in check_relocs for each symbol. This is so that + it can discard PC relative relocs if it doesn't need them when + linking with -Bsymbolic. We store the information in a field + extending the regular ELF linker hash table. */ + +/* This structure keeps track of the number of relocs we have copied + for a given symbol. */ +struct elf32_arm_relocs_copied + { + /* Next section. */ + struct elf32_arm_relocs_copied * next; + /* A section in dynobj. */ + asection * section; + /* Number of relocs copied in this section. */ + bfd_size_type count; + /* Number of PC-relative relocs copied in this section. */ + bfd_size_type pc_count; + }; + +#define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent)) + +/* Arm ELF linker hash entry. */ +struct elf32_arm_link_hash_entry + { + struct elf_link_hash_entry root; + + /* Number of PC relative relocs copied for this symbol. */ + struct elf32_arm_relocs_copied * relocs_copied; + + /* We reference count Thumb references to a PLT entry separately, + so that we can emit the Thumb trampoline only if needed. */ + bfd_signed_vma plt_thumb_refcount; + + /* Since PLT entries have variable size if the Thumb prologue is + used, we need to record the index into .got.plt instead of + recomputing it from the PLT offset. */ + bfd_signed_vma plt_got_offset; + +#define GOT_UNKNOWN 0 +#define GOT_NORMAL 1 +#define GOT_TLS_GD 2 +#define GOT_TLS_IE 4 + unsigned char tls_type; + }; + +/* Traverse an arm ELF linker hash table. */ +#define elf32_arm_link_hash_traverse(table, func, info) \ + (elf_link_hash_traverse \ + (&(table)->root, \ + (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ + (info))) + +/* Get the ARM elf linker hash table from a link_info structure. */ +#define elf32_arm_hash_table(info) \ + ((struct elf32_arm_link_hash_table *) ((info)->hash)) + +/* ARM ELF linker hash table. */ +struct elf32_arm_link_hash_table + { + /* The main hash table. */ + struct elf_link_hash_table root; + + /* The size in bytes of the section containing the Thumb-to-ARM glue. */ + bfd_size_type thumb_glue_size; + + /* The size in bytes of the section containing the ARM-to-Thumb glue. */ + bfd_size_type arm_glue_size; + + /* An arbitrary input BFD chosen to hold the glue sections. */ + bfd * bfd_of_glue_owner; + + /* Nonzero to output a BE8 image. */ + int byteswap_code; + + /* Zero if R_ARM_TARGET1 means R_ARM_ABS32. + Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */ + int target1_is_rel; + + /* The relocation to use for R_ARM_TARGET2 relocations. */ + int target2_reloc; + + /* Nonzero to fix BX instructions for ARMv4 targets. */ + int fix_v4bx; + + /* Nonzero if the ARM/Thumb BLX instructions are available for use. */ + int use_blx; + + /* The number of bytes in the initial entry in the PLT. */ + bfd_size_type plt_header_size; + + /* The number of bytes in the subsequent PLT etries. */ + bfd_size_type plt_entry_size; + + /* True if the target system is VxWorks. */ + int vxworks_p; + + /* True if the target system is Symbian OS. */ + int symbian_p; + + /* True if the target uses REL relocations. */ + int use_rel; + + /* Short-cuts to get to dynamic linker sections. */ + asection *sgot; + asection *sgotplt; + asection *srelgot; + asection *splt; + asection *srelplt; + asection *sdynbss; + asection *srelbss; + + /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */ + asection *srelplt2; + + /* Data for R_ARM_TLS_LDM32 relocations. */ + union { + bfd_signed_vma refcount; + bfd_vma offset; + } tls_ldm_got; + + /* Small local sym to section mapping cache. */ + struct sym_sec_cache sym_sec; + + /* For convenience in allocate_dynrelocs. */ + bfd * obfd; + }; + +/* Create an entry in an ARM ELF linker hash table. */ + +static struct bfd_hash_entry * +elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry, + struct bfd_hash_table * table, + const char * string) +{ + struct elf32_arm_link_hash_entry * ret = + (struct elf32_arm_link_hash_entry *) entry; + + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (ret == (struct elf32_arm_link_hash_entry *) NULL) + ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry)); + if (ret == NULL) + return (struct bfd_hash_entry *) ret; + + /* Call the allocation method of the superclass. */ + ret = ((struct elf32_arm_link_hash_entry *) + _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, + table, string)); + if (ret != NULL) + { + ret->relocs_copied = NULL; + ret->tls_type = GOT_UNKNOWN; + ret->plt_thumb_refcount = 0; + ret->plt_got_offset = -1; + } + + return (struct bfd_hash_entry *) ret; +} + +/* Return true if NAME is the name of the relocation section associated + with S. */ + +static bfd_boolean +reloc_section_p (struct elf32_arm_link_hash_table *htab, + const char *name, asection *s) +{ + if (htab->use_rel) + return strncmp (name, ".rel", 4) == 0 && strcmp (s->name, name + 4) == 0; + else + return strncmp (name, ".rela", 5) == 0 && strcmp (s->name, name + 5) == 0; +} + +/* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up + shortcuts to them in our hash table. */ + +static bfd_boolean +create_got_section (bfd *dynobj, struct bfd_link_info *info) +{ + struct elf32_arm_link_hash_table *htab; + + htab = elf32_arm_hash_table (info); + /* BPABI objects never have a GOT, or associated sections. */ + if (htab->symbian_p) + return TRUE; + + if (! _bfd_elf_create_got_section (dynobj, info)) + return FALSE; + + htab->sgot = bfd_get_section_by_name (dynobj, ".got"); + htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); + if (!htab->sgot || !htab->sgotplt) + abort (); + + htab->srelgot = bfd_make_section_with_flags (dynobj, + RELOC_SECTION (htab, ".got"), + (SEC_ALLOC | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_LINKER_CREATED + | SEC_READONLY)); + if (htab->srelgot == NULL + || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) + return FALSE; + return TRUE; +} + +/* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and + .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our + hash table. */ + +static bfd_boolean +elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) +{ + struct elf32_arm_link_hash_table *htab; + + htab = elf32_arm_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, + RELOC_SECTION (htab, ".plt")); + htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); + if (!info->shared) + htab->srelbss = bfd_get_section_by_name (dynobj, + RELOC_SECTION (htab, ".bss")); + + if (htab->vxworks_p) + { + if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2)) + return FALSE; + + if (info->shared) + { + htab->plt_header_size = 0; + htab->plt_entry_size + = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry); + } + else + { + htab->plt_header_size + = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry); + htab->plt_entry_size + = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry); + } + } + + if (!htab->splt + || !htab->srelplt + || !htab->sdynbss + || (!info->shared && !htab->srelbss)) + abort (); + + return TRUE; +} + +/* Copy the extra info we tack onto an elf_link_hash_entry. */ + +static void +elf32_arm_copy_indirect_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) +{ + struct elf32_arm_link_hash_entry *edir, *eind; + + edir = (struct elf32_arm_link_hash_entry *) dir; + eind = (struct elf32_arm_link_hash_entry *) ind; + + if (eind->relocs_copied != NULL) + { + if (edir->relocs_copied != NULL) + { + struct elf32_arm_relocs_copied **pp; + struct elf32_arm_relocs_copied *p; + + /* Add reloc counts against the indirect sym to the direct sym + list. Merge any entries against the same section. */ + for (pp = &eind->relocs_copied; (p = *pp) != NULL; ) + { + struct elf32_arm_relocs_copied *q; + + for (q = edir->relocs_copied; q != NULL; q = q->next) + if (q->section == p->section) + { + q->pc_count += p->pc_count; + q->count += p->count; + *pp = p->next; + break; + } + if (q == NULL) + pp = &p->next; + } + *pp = edir->relocs_copied; + } + + edir->relocs_copied = eind->relocs_copied; + eind->relocs_copied = NULL; + } + + /* Copy over PLT info. */ + edir->plt_thumb_refcount += eind->plt_thumb_refcount; + eind->plt_thumb_refcount = 0; + + if (ind->root.type == bfd_link_hash_indirect + && dir->got.refcount <= 0) + { + edir->tls_type = eind->tls_type; + eind->tls_type = GOT_UNKNOWN; + } + + _bfd_elf_link_hash_copy_indirect (info, dir, ind); +} + +/* Create an ARM elf linker hash table. */ + +static struct bfd_link_hash_table * +elf32_arm_link_hash_table_create (bfd *abfd) +{ + struct elf32_arm_link_hash_table *ret; + bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); + + ret = bfd_malloc (amt); + if (ret == NULL) + return NULL; + + if (!_bfd_elf_link_hash_table_init (& ret->root, abfd, + elf32_arm_link_hash_newfunc, + sizeof (struct elf32_arm_link_hash_entry))) + { + free (ret); + return NULL; + } + + ret->sgot = NULL; + ret->sgotplt = NULL; + ret->srelgot = NULL; + ret->splt = NULL; + ret->srelplt = NULL; + ret->sdynbss = NULL; + ret->srelbss = NULL; + ret->srelplt2 = NULL; + ret->thumb_glue_size = 0; + ret->arm_glue_size = 0; + ret->bfd_of_glue_owner = NULL; + ret->byteswap_code = 0; + ret->target1_is_rel = 0; + ret->target2_reloc = R_ARM_NONE; +#ifdef FOUR_WORD_PLT + ret->plt_header_size = 16; + ret->plt_entry_size = 16; +#else + ret->plt_header_size = 20; + ret->plt_entry_size = 12; +#endif + ret->fix_v4bx = 0; + ret->use_blx = 0; + ret->vxworks_p = 0; + ret->symbian_p = 0; + ret->use_rel = 1; + ret->sym_sec.abfd = NULL; + ret->obfd = abfd; + ret->tls_ldm_got.refcount = 0; + + return &ret->root.root; +} + +/* Locate the Thumb encoded calling stub for NAME. */ + +static struct elf_link_hash_entry * +find_thumb_glue (struct bfd_link_info *link_info, + const char *name, + bfd *input_bfd) +{ + char *tmp_name; + struct elf_link_hash_entry *hash; + struct elf32_arm_link_hash_table *hash_table; + + /* We need a pointer to the armelf specific hash table. */ + hash_table = elf32_arm_hash_table (link_info); + + tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); + + BFD_ASSERT (tmp_name); + + sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); + + hash = elf_link_hash_lookup + (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); + + if (hash == NULL) + /* xgettext:c-format */ + (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"), + input_bfd, tmp_name, name); + + free (tmp_name); + + return hash; +} + +/* Locate the ARM encoded calling stub for NAME. */ + +static struct elf_link_hash_entry * +find_arm_glue (struct bfd_link_info *link_info, + const char *name, + bfd *input_bfd) +{ + char *tmp_name; + struct elf_link_hash_entry *myh; + struct elf32_arm_link_hash_table *hash_table; + + /* We need a pointer to the elfarm specific hash table. */ + hash_table = elf32_arm_hash_table (link_info); + + tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); + + BFD_ASSERT (tmp_name); + + sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); + + myh = elf_link_hash_lookup + (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); + + if (myh == NULL) + /* xgettext:c-format */ + (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"), + input_bfd, tmp_name, name); + + free (tmp_name); + + return myh; +} + +/* ARM->Thumb glue (static images): + + .arm + __func_from_arm: + ldr r12, __func_addr + bx r12 + __func_addr: + .word func @ behave as if you saw a ARM_32 reloc. + + (relocatable images) + .arm + __func_from_arm: + ldr r12, __func_offset + add r12, r12, pc + bx r12 + __func_offset: + .word func - . + */ + +#define ARM2THUMB_STATIC_GLUE_SIZE 12 +static const insn32 a2t1_ldr_insn = 0xe59fc000; +static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; +static const insn32 a2t3_func_addr_insn = 0x00000001; + +#define ARM2THUMB_PIC_GLUE_SIZE 16 +static const insn32 a2t1p_ldr_insn = 0xe59fc004; +static const insn32 a2t2p_add_pc_insn = 0xe08cc00f; +static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c; + +/* Thumb->ARM: Thumb->(non-interworking aware) ARM + + .thumb .thumb + .align 2 .align 2 + __func_from_thumb: __func_from_thumb: + bx pc push {r6, lr} + nop ldr r6, __func_addr + .arm mov lr, pc + __func_change_to_arm: bx r6 + b func .arm + __func_back_to_thumb: + ldmia r13! {r6, lr} + bx lr + __func_addr: + .word func */ + +#define THUMB2ARM_GLUE_SIZE 8 +static const insn16 t2a1_bx_pc_insn = 0x4778; +static const insn16 t2a2_noop_insn = 0x46c0; +static const insn32 t2a3_b_insn = 0xea000000; + +#ifndef ELFARM_NABI_C_INCLUDED +bfd_boolean +bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info) +{ + asection * s; + bfd_byte * foo; + struct elf32_arm_link_hash_table * globals; + + globals = elf32_arm_hash_table (info); + + BFD_ASSERT (globals != NULL); + + if (globals->arm_glue_size != 0) + { + BFD_ASSERT (globals->bfd_of_glue_owner != NULL); + + s = bfd_get_section_by_name (globals->bfd_of_glue_owner, + ARM2THUMB_GLUE_SECTION_NAME); + + BFD_ASSERT (s != NULL); + + foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size); + + s->size = globals->arm_glue_size; + s->contents = foo; + } + + if (globals->thumb_glue_size != 0) + { + BFD_ASSERT (globals->bfd_of_glue_owner != NULL); + + s = bfd_get_section_by_name + (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); + + BFD_ASSERT (s != NULL); + + foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size); + + s->size = globals->thumb_glue_size; + s->contents = foo; + } + + return TRUE; +} + +static void +record_arm_to_thumb_glue (struct bfd_link_info * link_info, + struct elf_link_hash_entry * h) +{ + const char * name = h->root.root.string; + asection * s; + char * tmp_name; + struct elf_link_hash_entry * myh; + struct bfd_link_hash_entry * bh; + struct elf32_arm_link_hash_table * globals; + bfd_vma val; + + globals = elf32_arm_hash_table (link_info); + + BFD_ASSERT (globals != NULL); + BFD_ASSERT (globals->bfd_of_glue_owner != NULL); + + s = bfd_get_section_by_name + (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); + + BFD_ASSERT (s != NULL); + + tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); + + BFD_ASSERT (tmp_name); + + sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); + + myh = elf_link_hash_lookup + (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); + + if (myh != NULL) + { + /* We've already seen this guy. */ + free (tmp_name); + return; + } + + /* The only trick here is using hash_table->arm_glue_size as the value. + Even though the section isn't allocated yet, this is where we will be + putting it. */ + bh = NULL; + val = globals->arm_glue_size + 1; + _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, + tmp_name, BSF_GLOBAL, s, val, + NULL, TRUE, FALSE, &bh); + + myh = (struct elf_link_hash_entry *) bh; + myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); + myh->forced_local = 1; + + free (tmp_name); + + if ((link_info->shared || globals->root.is_relocatable_executable)) + globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE; + else + globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE; + + return; +} + +static void +record_thumb_to_arm_glue (struct bfd_link_info *link_info, + struct elf_link_hash_entry *h) +{ + const char *name = h->root.root.string; + asection *s; + char *tmp_name; + struct elf_link_hash_entry *myh; + struct bfd_link_hash_entry *bh; + struct elf32_arm_link_hash_table *hash_table; + bfd_vma val; + + hash_table = elf32_arm_hash_table (link_info); + + BFD_ASSERT (hash_table != NULL); + BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); + + s = bfd_get_section_by_name + (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); + + BFD_ASSERT (s != NULL); + + tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); + + BFD_ASSERT (tmp_name); + + sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); + + myh = elf_link_hash_lookup + (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); + + if (myh != NULL) + { + /* We've already seen this guy. */ + free (tmp_name); + return; + } + + bh = NULL; + val = hash_table->thumb_glue_size + 1; + _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, + tmp_name, BSF_GLOBAL, s, val, + NULL, TRUE, FALSE, &bh); + + /* If we mark it 'Thumb', the disassembler will do a better job. */ + myh = (struct elf_link_hash_entry *) bh; + myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC); + myh->forced_local = 1; + + free (tmp_name); + +#define CHANGE_TO_ARM "__%s_change_to_arm" +#define BACK_FROM_ARM "__%s_back_from_arm" + + /* Allocate another symbol to mark where we switch to Arm mode. */ + tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + + strlen (CHANGE_TO_ARM) + 1); + + BFD_ASSERT (tmp_name); + + sprintf (tmp_name, CHANGE_TO_ARM, name); + + bh = NULL; + val = hash_table->thumb_glue_size + 4, + _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, + tmp_name, BSF_LOCAL, s, val, + NULL, TRUE, FALSE, &bh); + + free (tmp_name); + + hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; + + return; +} + +/* Add the glue sections to ABFD. This function is called from the + linker scripts in ld/emultempl/{armelf}.em. */ + +bfd_boolean +bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd, + struct bfd_link_info *info) +{ + flagword flags; + asection *sec; + + /* If we are only performing a partial + link do not bother adding the glue. */ + if (info->relocatable) + return TRUE; + + sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); + + if (sec == NULL) + { + /* Note: we do not include the flag SEC_LINKER_CREATED, as this + will prevent elf_link_input_bfd() from processing the contents + of this section. */ + flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; + + sec = bfd_make_section_with_flags (abfd, + ARM2THUMB_GLUE_SECTION_NAME, + flags); + + if (sec == NULL + || !bfd_set_section_alignment (abfd, sec, 2)) + return FALSE; + + /* Set the gc mark to prevent the section from being removed by garbage + collection, despite the fact that no relocs refer to this section. */ + sec->gc_mark = 1; + } + + sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); + + if (sec == NULL) + { + flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY + | SEC_CODE | SEC_READONLY; + + sec = bfd_make_section_with_flags (abfd, + THUMB2ARM_GLUE_SECTION_NAME, + flags); + + if (sec == NULL + || !bfd_set_section_alignment (abfd, sec, 2)) + return FALSE; + + sec->gc_mark = 1; + } + + return TRUE; +} + +/* Select a BFD to be used to hold the sections used by the glue code. + This function is called from the linker scripts in ld/emultempl/ + {armelf/pe}.em */ + +bfd_boolean +bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info) +{ + struct elf32_arm_link_hash_table *globals; + + /* If we are only performing a partial link + do not bother getting a bfd to hold the glue. */ + if (info->relocatable) + return TRUE; + + /* Make sure we don't attach the glue sections to a dynamic object. */ + BFD_ASSERT (!(abfd->flags & DYNAMIC)); + + globals = elf32_arm_hash_table (info); + + BFD_ASSERT (globals != NULL); + + if (globals->bfd_of_glue_owner != NULL) + return TRUE; + + /* Save the bfd for later use. */ + globals->bfd_of_glue_owner = abfd; + + return TRUE; +} + +static void check_use_blx(struct elf32_arm_link_hash_table *globals) +{ + if (elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch) > 2) + globals->use_blx = 1; +} + +bfd_boolean +bfd_elf32_arm_process_before_allocation (bfd *abfd, + struct bfd_link_info *link_info, + int byteswap_code) +{ + Elf_Internal_Shdr *symtab_hdr; + Elf_Internal_Rela *internal_relocs = NULL; + Elf_Internal_Rela *irel, *irelend; + bfd_byte *contents = NULL; + + asection *sec; + struct elf32_arm_link_hash_table *globals; + + /* If we are only performing a partial link do not bother + to construct any glue. */ + if (link_info->relocatable) + return TRUE; + + /* Here we have a bfd that is to be included on the link. We have a hook + to do reloc rummaging, before section sizes are nailed down. */ + globals = elf32_arm_hash_table (link_info); + check_use_blx (globals); + + BFD_ASSERT (globals != NULL); + BFD_ASSERT (globals->bfd_of_glue_owner != NULL); + + if (byteswap_code && !bfd_big_endian (abfd)) + { + _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."), + abfd); + return FALSE; + } + globals->byteswap_code = byteswap_code; + + /* Rummage around all the relocs and map the glue vectors. */ + sec = abfd->sections; + + if (sec == NULL) + return TRUE; + + for (; sec != NULL; sec = sec->next) + { + if (sec->reloc_count == 0) + continue; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + + /* Load the relocs. */ + internal_relocs + = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL, + (Elf_Internal_Rela *) NULL, FALSE); + + if (internal_relocs == NULL) + goto error_return; + + irelend = internal_relocs + sec->reloc_count; + for (irel = internal_relocs; irel < irelend; irel++) + { + long r_type; + unsigned long r_index; + + struct elf_link_hash_entry *h; + + r_type = ELF32_R_TYPE (irel->r_info); + r_index = ELF32_R_SYM (irel->r_info); + + /* These are the only relocation types we care about. */ + if ( r_type != R_ARM_PC24 + && r_type != R_ARM_PLT32 + && r_type != R_ARM_CALL + && r_type != R_ARM_JUMP24 + && r_type != R_ARM_THM_CALL) + continue; + + /* Get the section contents if we haven't done so already. */ + if (contents == NULL) + { + /* Get cached copy if it exists. */ + if (elf_section_data (sec)->this_hdr.contents != NULL) + contents = elf_section_data (sec)->this_hdr.contents; + else + { + /* Go get them off disk. */ + if (! bfd_malloc_and_get_section (abfd, sec, &contents)) + goto error_return; + } + } + + /* If the relocation is not against a symbol it cannot concern us. */ + h = NULL; + + /* We don't care about local symbols. */ + if (r_index < symtab_hdr->sh_info) + continue; + + /* This is an external symbol. */ + r_index -= symtab_hdr->sh_info; + h = (struct elf_link_hash_entry *) + elf_sym_hashes (abfd)[r_index]; + + /* If the relocation is against a static symbol it must be within + the current section and so cannot be a cross ARM/Thumb relocation. */ + if (h == NULL) + continue; + + /* If the call will go through a PLT entry then we do not need + glue. */ + if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1) + continue; + + switch (r_type) + { + case R_ARM_PC24: + case R_ARM_PLT32: + case R_ARM_CALL: + case R_ARM_JUMP24: + /* This one is a call from arm code. We need to look up + the target of the call. If it is a thumb target, we + insert glue. */ + if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC + && !(r_type == R_ARM_CALL && globals->use_blx)) + record_arm_to_thumb_glue (link_info, h); + break; + + case R_ARM_THM_CALL: + /* This one is a call from thumb code. We look + up the target of the call. If it is not a thumb + target, we insert glue. */ + if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC && !globals->use_blx) + record_thumb_to_arm_glue (link_info, h); + break; + + default: + abort (); + } + } + + if (contents != NULL + && elf_section_data (sec)->this_hdr.contents != contents) + free (contents); + contents = NULL; + + if (internal_relocs != NULL + && elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); + internal_relocs = NULL; + } + + return TRUE; + +error_return: + if (contents != NULL + && elf_section_data (sec)->this_hdr.contents != contents) + free (contents); + if (internal_relocs != NULL + && elf_section_data (sec)->relocs != internal_relocs) + free (internal_relocs); + + return FALSE; +} +#endif + + +/* Set target relocation values needed during linking. */ + +void +bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info, + int target1_is_rel, + char * target2_type, + int fix_v4bx, + int use_blx) +{ + struct elf32_arm_link_hash_table *globals; + + globals = elf32_arm_hash_table (link_info); + + globals->target1_is_rel = target1_is_rel; + if (strcmp (target2_type, "rel") == 0) + globals->target2_reloc = R_ARM_REL32; + else if (strcmp (target2_type, "abs") == 0) + globals->target2_reloc = R_ARM_ABS32; + else if (strcmp (target2_type, "got-rel") == 0) + globals->target2_reloc = R_ARM_GOT_PREL; + else + { + _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."), + target2_type); + } + globals->fix_v4bx = fix_v4bx; + globals->use_blx |= use_blx; +} + +/* The thumb form of a long branch is a bit finicky, because the offset + encoding is split over two fields, each in it's own instruction. They + can occur in any order. So given a thumb form of long branch, and an + offset, insert the offset into the thumb branch and return finished + instruction. + + It takes two thumb instructions to encode the target address. Each has + 11 bits to invest. The upper 11 bits are stored in one (identified by + H-0.. see below), the lower 11 bits are stored in the other (identified + by H-1). + + Combine together and shifted left by 1 (it's a half word address) and + there you have it. + + Op: 1111 = F, + H-0, upper address-0 = 000 + Op: 1111 = F, + H-1, lower address-0 = 800 + + They can be ordered either way, but the arm tools I've seen always put + the lower one first. It probably doesn't matter. krk@cygnus.com + + XXX: Actually the order does matter. The second instruction (H-1) + moves the computed address into the PC, so it must be the second one + in the sequence. The problem, however is that whilst little endian code + stores the instructions in HI then LOW order, big endian code does the + reverse. nickc@cygnus.com. */ + +#define LOW_HI_ORDER 0xF800F000 +#define HI_LOW_ORDER 0xF000F800 + +static insn32 +insert_thumb_branch (insn32 br_insn, int rel_off) +{ + unsigned int low_bits; + unsigned int high_bits; + + BFD_ASSERT ((rel_off & 1) != 1); + + rel_off >>= 1; /* Half word aligned address. */ + low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ + high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ + + if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) + br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; + else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) + br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; + else + /* FIXME: abort is probably not the right call. krk@cygnus.com */ + abort (); /* Error - not a valid branch instruction form. */ + + return br_insn; +} + +/* Thumb code calling an ARM function. */ + +static int +elf32_thumb_to_arm_stub (struct bfd_link_info * info, + const char * name, + bfd * input_bfd, + bfd * output_bfd, + asection * input_section, + bfd_byte * hit_data, + asection * sym_sec, + bfd_vma offset, + bfd_signed_vma addend, + bfd_vma val) +{ + asection * s = 0; + bfd_vma my_offset; + unsigned long int tmp; + long int ret_offset; + struct elf_link_hash_entry * myh; + struct elf32_arm_link_hash_table * globals; + + myh = find_thumb_glue (info, name, input_bfd); + if (myh == NULL) + return FALSE; + + globals = elf32_arm_hash_table (info); + + BFD_ASSERT (globals != NULL); + BFD_ASSERT (globals->bfd_of_glue_owner != NULL); + + my_offset = myh->root.u.def.value; + + s = bfd_get_section_by_name (globals->bfd_of_glue_owner, + THUMB2ARM_GLUE_SECTION_NAME); + + BFD_ASSERT (s != NULL); + BFD_ASSERT (s->contents != NULL); + BFD_ASSERT (s->output_section != NULL); + + if ((my_offset & 0x01) == 0x01) + { + if (sym_sec != NULL + && sym_sec->owner != NULL + && !INTERWORK_FLAG (sym_sec->owner)) + { + (*_bfd_error_handler) + (_("%B(%s): warning: interworking not enabled.\n" + " first occurrence: %B: thumb call to arm"), + sym_sec->owner, input_bfd, name); + + return FALSE; + } + + --my_offset; + myh->root.u.def.value = my_offset; + + bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn, + s->contents + my_offset); + + bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn, + s->contents + my_offset + 2); + + ret_offset = + /* Address of destination of the stub. */ + ((bfd_signed_vma) val) + - ((bfd_signed_vma) + /* Offset from the start of the current section + to the start of the stubs. */ + (s->output_offset + /* Offset of the start of this stub from the start of the stubs. */ + + my_offset + /* Address of the start of the current section. */ + + s->output_section->vma) + /* The branch instruction is 4 bytes into the stub. */ + + 4 + /* ARM branches work from the pc of the instruction + 8. */ + + 8); + + bfd_put_32 (output_bfd, + (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), + s->contents + my_offset + 4); + } + + BFD_ASSERT (my_offset <= globals->thumb_glue_size); + + /* Now go back and fix up the original BL insn to point to here. */ + ret_offset = + /* Address of where the stub is located. */ + (s->output_section->vma + s->output_offset + my_offset) + /* Address of where the BL is located. */ + - (input_section->output_section->vma + input_section->output_offset + + offset) + /* Addend in the relocation. */ + - addend + /* Biassing for PC-relative addressing. */ + - 8; + + tmp = bfd_get_32 (input_bfd, hit_data + - input_section->vma); + + bfd_put_32 (output_bfd, + (bfd_vma) insert_thumb_branch (tmp, ret_offset), + hit_data - input_section->vma); + + return TRUE; +} + +/* Arm code calling a Thumb function. */ + +static int +elf32_arm_to_thumb_stub (struct bfd_link_info * info, + const char * name, + bfd * input_bfd, + bfd * output_bfd, + asection * input_section, + bfd_byte * hit_data, + asection * sym_sec, + bfd_vma offset, + bfd_signed_vma addend, + bfd_vma val) +{ + unsigned long int tmp; + bfd_vma my_offset; + asection * s; + long int ret_offset; + struct elf_link_hash_entry * myh; + struct elf32_arm_link_hash_table * globals; + + myh = find_arm_glue (info, name, input_bfd); + if (myh == NULL) + return FALSE; + + globals = elf32_arm_hash_table (info); + + BFD_ASSERT (globals != NULL); + BFD_ASSERT (globals->bfd_of_glue_owner != NULL); + + my_offset = myh->root.u.def.value; + s = bfd_get_section_by_name (globals->bfd_of_glue_owner, + ARM2THUMB_GLUE_SECTION_NAME); + BFD_ASSERT (s != NULL); + BFD_ASSERT (s->contents != NULL); + BFD_ASSERT (s->output_section != NULL); + + if ((my_offset & 0x01) == 0x01) + { + if (sym_sec != NULL + && sym_sec->owner != NULL + && !INTERWORK_FLAG (sym_sec->owner)) + { + (*_bfd_error_handler) + (_("%B(%s): warning: interworking not enabled.\n" + " first occurrence: %B: arm call to thumb"), + sym_sec->owner, input_bfd, name); + } + + --my_offset; + myh->root.u.def.value = my_offset; + + if ((info->shared || globals->root.is_relocatable_executable)) + { + /* For relocatable objects we can't use absolute addresses, + so construct the address from a relative offset. */ + /* TODO: If the offset is small it's probably worth + constructing the address with adds. */ + bfd_put_32 (output_bfd, (bfd_vma) a2t1p_ldr_insn, + s->contents + my_offset); + bfd_put_32 (output_bfd, (bfd_vma) a2t2p_add_pc_insn, + s->contents + my_offset + 4); + bfd_put_32 (output_bfd, (bfd_vma) a2t3p_bx_r12_insn, + s->contents + my_offset + 8); + /* Adjust the offset by 4 for the position of the add, + and 8 for the pipeline offset. */ + ret_offset = (val - (s->output_offset + + s->output_section->vma + + my_offset + 12)) + | 1; + bfd_put_32 (output_bfd, ret_offset, + s->contents + my_offset + 12); + } + else + { + bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn, + s->contents + my_offset); + + bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn, + s->contents + my_offset + 4); + + /* It's a thumb address. Add the low order bit. */ + bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, + s->contents + my_offset + 8); + } + } + + BFD_ASSERT (my_offset <= globals->arm_glue_size); + + tmp = bfd_get_32 (input_bfd, hit_data); + tmp = tmp & 0xFF000000; + + /* Somehow these are both 4 too far, so subtract 8. */ + ret_offset = (s->output_offset + + my_offset + + s->output_section->vma + - (input_section->output_offset + + input_section->output_section->vma + + offset + addend) + - 8); + + tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); + + bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); + + return TRUE; +} + +/* Some relocations map to different relocations depending on the + target. Return the real relocation. */ +static int +arm_real_reloc_type (struct elf32_arm_link_hash_table * globals, + int r_type) +{ + switch (r_type) + { + case R_ARM_TARGET1: + if (globals->target1_is_rel) + return R_ARM_REL32; + else + return R_ARM_ABS32; + + case R_ARM_TARGET2: + return globals->target2_reloc; + + default: + return r_type; + } +} + +/* Return the base VMA address which should be subtracted from real addresses + when resolving @dtpoff relocation. + This is PT_TLS segment p_vaddr. */ + +static bfd_vma +dtpoff_base (struct bfd_link_info *info) +{ + /* If tls_sec is NULL, we should have signalled an error already. */ + if (elf_hash_table (info)->tls_sec == NULL) + return 0; + return elf_hash_table (info)->tls_sec->vma; +} + +/* Return the relocation value for @tpoff relocation + if STT_TLS virtual address is ADDRESS. */ + +static bfd_vma +tpoff (struct bfd_link_info *info, bfd_vma address) +{ + struct elf_link_hash_table *htab = elf_hash_table (info); + bfd_vma base; + + /* If tls_sec is NULL, we should have signalled an error already. */ + if (htab->tls_sec == NULL) + return 0; + base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); + return address - htab->tls_sec->vma + base; +} + +/* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA. + VALUE is the relocation value. */ + +static bfd_reloc_status_type +elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value) +{ + if (value > 0xfff) + return bfd_reloc_overflow; + + value |= bfd_get_32 (abfd, data) & 0xfffff000; + bfd_put_32 (abfd, value, data); + return bfd_reloc_ok; +} + +/* Perform a relocation as part of a final link. */ + +static bfd_reloc_status_type +elf32_arm_final_link_relocate (reloc_howto_type * howto, + bfd * input_bfd, + bfd * output_bfd, + asection * input_section, + bfd_byte * contents, + Elf_Internal_Rela * rel, + bfd_vma value, + struct bfd_link_info * info, + asection * sym_sec, + const char * sym_name, + int sym_flags, + struct elf_link_hash_entry * h, + bfd_boolean * unresolved_reloc_p) +{ + unsigned long r_type = howto->type; + unsigned long r_symndx; + bfd_byte * hit_data = contents + rel->r_offset; + bfd * dynobj = NULL; + Elf_Internal_Shdr * symtab_hdr; + struct elf_link_hash_entry ** sym_hashes; + bfd_vma * local_got_offsets; + asection * sgot = NULL; + asection * splt = NULL; + asection * sreloc = NULL; + bfd_vma addend; + bfd_signed_vma signed_addend; + struct elf32_arm_link_hash_table * globals; + + globals = elf32_arm_hash_table (info); + + /* Some relocation type map to different relocations depending on the + target. We pick the right one here. */ + r_type = arm_real_reloc_type (globals, r_type); + if (r_type != howto->type) + howto = elf32_arm_howto_from_type (r_type); + + /* If the start address has been set, then set the EF_ARM_HASENTRY + flag. Setting this more than once is redundant, but the cost is + not too high, and it keeps the code simple. + + The test is done here, rather than somewhere else, because the + start address is only set just before the final link commences. + + Note - if the user deliberately sets a start address of 0, the + flag will not be set. */ + if (bfd_get_start_address (output_bfd) != 0) + elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; + + dynobj = elf_hash_table (info)->dynobj; + if (dynobj) + { + sgot = bfd_get_section_by_name (dynobj, ".got"); + splt = bfd_get_section_by_name (dynobj, ".plt"); + } + symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + local_got_offsets = elf_local_got_offsets (input_bfd); + r_symndx = ELF32_R_SYM (rel->r_info); + + if (globals->use_rel) + { + addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; + + if (addend & ((howto->src_mask + 1) >> 1)) + { + signed_addend = -1; + signed_addend &= ~ howto->src_mask; + signed_addend |= addend; + } + else + signed_addend = addend; + } + else + addend = signed_addend = rel->r_addend; + + switch (r_type) + { + case R_ARM_NONE: + /* We don't need to find a value for this symbol. It's just a + marker. */ + *unresolved_reloc_p = FALSE; + return bfd_reloc_ok; + + case R_ARM_ABS12: + if (!globals->vxworks_p) + return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend); + + case R_ARM_PC24: + case R_ARM_ABS32: + case R_ARM_REL32: + case R_ARM_CALL: + case R_ARM_JUMP24: + case R_ARM_XPC25: + case R_ARM_PREL31: + case R_ARM_PLT32: + /* 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) + return bfd_reloc_ok; + + /* Handle relocations which should use the PLT entry. ABS32/REL32 + will use the symbol's value, which may point to a PLT entry, but we + don't need to handle that here. If we created a PLT entry, all + branches in this object should go to it. */ + if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32) + && h != NULL + && splt != NULL + && h->plt.offset != (bfd_vma) -1) + { + /* If we've created a .plt section, and assigned a PLT entry to + this function, it should not be known to bind locally. If + it were, we would have cleared the PLT entry. */ + BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); + + value = (splt->output_section->vma + + splt->output_offset + + h->plt.offset); + *unresolved_reloc_p = FALSE; + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + } + + /* When generating a shared object or relocatable executable, these + relocations are copied into the output file to be resolved at + run time. */ + if ((info->shared || globals->root.is_relocatable_executable) + && (input_section->flags & SEC_ALLOC) + && (r_type != R_ARM_REL32 + || !SYMBOL_CALLS_LOCAL (info, h)) + && (h == NULL + || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak) + && r_type != R_ARM_PC24 + && r_type != R_ARM_CALL + && r_type != R_ARM_JUMP24 + && r_type != R_ARM_PREL31 + && r_type != R_ARM_PLT32) + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + bfd_boolean skip, relocate; + + *unresolved_reloc_p = FALSE; + + if (sreloc == NULL) + { + const char * name; + + name = (bfd_elf_string_from_elf_section + (input_bfd, + elf_elfheader (input_bfd)->e_shstrndx, + elf_section_data (input_section)->rel_hdr.sh_name)); + if (name == NULL) + return bfd_reloc_notsupported; + + BFD_ASSERT (reloc_section_p (globals, name, input_section)); + + sreloc = bfd_get_section_by_name (dynobj, name); + BFD_ASSERT (sreloc != NULL); + } + + skip = FALSE; + relocate = FALSE; + + outrel.r_addend = addend; + outrel.r_offset = + _bfd_elf_section_offset (output_bfd, info, input_section, + rel->r_offset); + if (outrel.r_offset == (bfd_vma) -1) + skip = TRUE; + else if (outrel.r_offset == (bfd_vma) -2) + skip = TRUE, relocate = TRUE; + outrel.r_offset += (input_section->output_section->vma + + input_section->output_offset); + + if (skip) + memset (&outrel, 0, sizeof outrel); + else if (h != NULL + && h->dynindx != -1 + && (!info->shared + || !info->symbolic + || !h->def_regular)) + outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); + else + { + int symbol; + + /* This symbol is local, or marked to become local. */ + if (sym_flags == STT_ARM_TFUNC) + value |= 1; + if (globals->symbian_p) + { + /* On Symbian OS, the data segment and text segement + can be relocated independently. Therefore, we + must indicate the segment to which this + relocation is relative. The BPABI allows us to + use any symbol in the right segment; we just use + the section symbol as it is convenient. (We + cannot use the symbol given by "h" directly as it + will not appear in the dynamic symbol table.) */ + if (sym_sec) + symbol = elf_section_data (sym_sec->output_section)->dynindx; + else + symbol = elf_section_data (input_section->output_section)->dynindx; + BFD_ASSERT (symbol != 0); + } + else + /* On SVR4-ish systems, the dynamic loader cannot + relocate the text and data segments independently, + so the symbol does not matter. */ + symbol = 0; + outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE); + if (globals->use_rel) + relocate = TRUE; + else + outrel.r_addend += value; + } + + loc = sreloc->contents; + loc += sreloc->reloc_count++ * RELOC_SIZE (globals); + SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); + + /* If this reloc is against an external symbol, we do not want to + fiddle with the addend. Otherwise, we need to include the symbol + value so that it becomes an addend for the dynamic reloc. */ + if (! relocate) + return bfd_reloc_ok; + + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + (bfd_vma) 0); + } + else switch (r_type) + { + case R_ARM_ABS12: + return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend); + + case R_ARM_XPC25: /* Arm BLX instruction. */ + case R_ARM_CALL: + case R_ARM_JUMP24: + case R_ARM_PC24: /* Arm B/BL instruction */ + case R_ARM_PLT32: + if (r_type == R_ARM_XPC25) + { + /* Check for Arm calling Arm function. */ + /* FIXME: Should we translate the instruction into a BL + instruction instead ? */ + if (sym_flags != STT_ARM_TFUNC) + (*_bfd_error_handler) + (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."), + input_bfd, + h ? h->root.root.string : "(local)"); + } + else if (r_type != R_ARM_CALL || !globals->use_blx) + { + /* Check for Arm calling Thumb function. */ + if (sym_flags == STT_ARM_TFUNC) + { + elf32_arm_to_thumb_stub (info, sym_name, input_bfd, + output_bfd, input_section, + hit_data, sym_sec, rel->r_offset, + signed_addend, value); + return bfd_reloc_ok; + } + } + + /* The ARM ELF ABI says that this reloc is computed as: S - P + A + where: + S is the address of the symbol in the relocation. + P is address of the instruction being relocated. + A is the addend (extracted from the instruction) in bytes. + + S is held in 'value'. + P is the base address of the section containing the + instruction plus the offset of the reloc into that + section, ie: + (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset). + A is the addend, converted into bytes, ie: + (signed_addend * 4) + + Note: None of these operations have knowledge of the pipeline + size of the processor, thus it is up to the assembler to + encode this information into the addend. */ + value -= (input_section->output_section->vma + + input_section->output_offset); + value -= rel->r_offset; + if (globals->use_rel) + value += (signed_addend << howto->size); + else + /* RELA addends do not have to be adjusted by howto->size. */ + value += signed_addend; + + signed_addend = value; + signed_addend >>= howto->rightshift; + + /* It is not an error for an undefined weak reference to be + out of range. Any program that branches to such a symbol + is going to crash anyway, so there is no point worrying + about getting the destination exactly right. */ + if (! h || h->root.type != bfd_link_hash_undefweak) + { + /* Perform a signed range check. */ + if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) + || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) + return bfd_reloc_overflow; + } + + addend = (value & 2); + + value = (signed_addend & howto->dst_mask) + | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); + + /* Set the H bit in the BLX instruction. */ + if (sym_flags == STT_ARM_TFUNC) + { + if (addend) + value |= (1 << 24); + else + value &= ~(bfd_vma)(1 << 24); + } + if (r_type == R_ARM_CALL) + { + /* Select the correct instruction (BL or BLX). */ + if (sym_flags == STT_ARM_TFUNC) + value |= (1 << 28); + else + { + value &= ~(bfd_vma)(1 << 28); + value |= (1 << 24); + } + } + break; + + case R_ARM_ABS32: + value += addend; + if (sym_flags == STT_ARM_TFUNC) + value |= 1; + break; + + case R_ARM_REL32: + value += addend; + if (sym_flags == STT_ARM_TFUNC) + value |= 1; + value -= (input_section->output_section->vma + + input_section->output_offset + rel->r_offset); + break; + + case R_ARM_PREL31: + value -= (input_section->output_section->vma + + input_section->output_offset + rel->r_offset); + value += signed_addend; + if (! h || h->root.type != bfd_link_hash_undefweak) + { + /* Check for overflow */ + if ((value ^ (value >> 1)) & (1 << 30)) + return bfd_reloc_overflow; + } + value &= 0x7fffffff; + value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000); + if (sym_flags == STT_ARM_TFUNC) + value |= 1; + break; + } + + bfd_put_32 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_ARM_ABS8: + value += addend; + if ((long) value > 0x7f || (long) value < -0x80) + return bfd_reloc_overflow; + + bfd_put_8 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_ARM_ABS16: + value += addend; + + if ((long) value > 0x7fff || (long) value < -0x8000) + return bfd_reloc_overflow; + + bfd_put_16 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_ARM_THM_ABS5: + /* Support ldr and str instructions for the thumb. */ + if (globals->use_rel) + { + /* Need to refetch addend. */ + addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; + /* ??? Need to determine shift amount from operand size. */ + addend >>= howto->rightshift; + } + value += addend; + + /* ??? Isn't value unsigned? */ + if ((long) value > 0x1f || (long) value < -0x10) + return bfd_reloc_overflow; + + /* ??? Value needs to be properly shifted into place first. */ + value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; + bfd_put_16 (input_bfd, value, hit_data); + return bfd_reloc_ok; + + case R_ARM_THM_XPC22: + case R_ARM_THM_CALL: + /* Thumb BL (branch long instruction). */ + { + bfd_vma relocation; + bfd_boolean overflow = FALSE; + bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); + bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); + bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; + bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; + bfd_vma check; + bfd_signed_vma signed_check; + + /* Need to refetch the addend and squish the two 11 bit pieces + together. */ + if (globals->use_rel) + { + bfd_vma upper = upper_insn & 0x7ff; + bfd_vma lower = lower_insn & 0x7ff; + upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ + addend = (upper << 12) | (lower << 1); + signed_addend = addend; + } + + if (r_type == R_ARM_THM_XPC22) + { + /* Check for Thumb to Thumb call. */ + /* FIXME: Should we translate the instruction into a BL + instruction instead ? */ + if (sym_flags == STT_ARM_TFUNC) + (*_bfd_error_handler) + (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."), + input_bfd, + h ? h->root.root.string : "(local)"); + } + else + { + /* If it is not a call to Thumb, assume call to Arm. + If it is a call relative to a section name, then it is not a + function call at all, but rather a long jump. Calls through + the PLT do not require stubs. */ + if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION + && (h == NULL || splt == NULL + || h->plt.offset == (bfd_vma) -1)) + { + if (globals->use_blx) + { + /* Convert BL to BLX. */ + lower_insn = (lower_insn & ~0x1000) | 0x0800; + } + else if (elf32_thumb_to_arm_stub + (info, sym_name, input_bfd, output_bfd, input_section, + hit_data, sym_sec, rel->r_offset, signed_addend, value)) + return bfd_reloc_ok; + else + return bfd_reloc_dangerous; + } + else if (sym_flags == STT_ARM_TFUNC && globals->use_blx) + { + /* Make sure this is a BL. */ + lower_insn |= 0x1800; + } + } + + /* Handle calls via the PLT. */ + if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) + { + value = (splt->output_section->vma + + splt->output_offset + + h->plt.offset); + if (globals->use_blx) + { + /* If the Thumb BLX instruction is available, convert the + BL to a BLX instruction to call the ARM-mode PLT entry. */ + lower_insn = (lower_insn & ~0x1000) | 0x0800; + } + else + /* Target the Thumb stub before the ARM PLT entry. */ + value -= PLT_THUMB_STUB_SIZE; + *unresolved_reloc_p = FALSE; + } + + relocation = value + signed_addend; + + relocation -= (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + + check = relocation >> howto->rightshift; + + /* If this is a signed value, the rightshift just dropped + leading 1 bits (assuming twos complement). */ + if ((bfd_signed_vma) relocation >= 0) + signed_check = check; + else + signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); + + /* Assumes two's complement. */ + if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) + overflow = TRUE; + + if ((lower_insn & 0x1800) == 0x0800) + /* For a BLX instruction, make sure that the relocation is rounded up + to a word boundary. This follows the semantics of the instruction + which specifies that bit 1 of the target address will come from bit + 1 of the base address. */ + relocation = (relocation + 2) & ~ 3; + + /* Put RELOCATION back into the insn. */ + upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); + lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); + + /* Put the relocated value back in the object file: */ + bfd_put_16 (input_bfd, upper_insn, hit_data); + bfd_put_16 (input_bfd, lower_insn, hit_data + 2); + + return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); + } + break; + + case R_ARM_THM_JUMP24: + /* Thumb32 unconditional branch instruction. */ + { + bfd_vma relocation; + bfd_boolean overflow = FALSE; + bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); + bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); + bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; + bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; + bfd_vma check; + bfd_signed_vma signed_check; + + /* Need to refetch the addend, reconstruct the top three bits, and glue the + two pieces together. */ + if (globals->use_rel) + { + bfd_vma S = (upper_insn & 0x0400) >> 10; + bfd_vma hi = (upper_insn & 0x03ff); + bfd_vma I1 = (lower_insn & 0x2000) >> 13; + bfd_vma I2 = (lower_insn & 0x0800) >> 11; + bfd_vma lo = (lower_insn & 0x07ff); + + I1 = !(I1 ^ S); + I2 = !(I2 ^ S); + S = !S; + + signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1); + signed_addend -= (1 << 24); /* Sign extend. */ + } + + /* ??? Should handle interworking? GCC might someday try to + use this for tail calls. */ + + relocation = value + signed_addend; + relocation -= (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + + check = relocation >> howto->rightshift; + + /* If this is a signed value, the rightshift just dropped + leading 1 bits (assuming twos complement). */ + if ((bfd_signed_vma) relocation >= 0) + signed_check = check; + else + signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); + + /* Assumes two's complement. */ + if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) + overflow = TRUE; + + /* Put RELOCATION back into the insn. */ + { + bfd_vma S = (relocation & 0x01000000) >> 24; + bfd_vma I1 = (relocation & 0x00800000) >> 23; + bfd_vma I2 = (relocation & 0x00400000) >> 22; + bfd_vma hi = (relocation & 0x003ff000) >> 12; + bfd_vma lo = (relocation & 0x00000ffe) >> 1; + + I1 = !(I1 ^ S); + I2 = !(I2 ^ S); + + upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi; + lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo; + } + + /* Put the relocated value back in the object file: */ + bfd_put_16 (input_bfd, upper_insn, hit_data); + bfd_put_16 (input_bfd, lower_insn, hit_data + 2); + + return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); + } + + case R_ARM_THM_JUMP19: + /* Thumb32 conditional branch instruction. */ + { + bfd_vma relocation; + bfd_boolean overflow = FALSE; + bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); + bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); + bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; + bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; + bfd_vma check; + bfd_signed_vma signed_check; + + /* Need to refetch the addend, reconstruct the top three bits, + and squish the two 11 bit pieces together. */ + if (globals->use_rel) + { + bfd_vma S = (upper_insn & 0x0400) >> 10; + bfd_vma upper = (upper_insn & 0x001f); + bfd_vma J1 = (lower_insn & 0x2000) >> 13; + bfd_vma J2 = (lower_insn & 0x0800) >> 11; + bfd_vma lower = (lower_insn & 0x07ff); + + upper |= J2 << 6; + upper |= J1 << 7; + upper |= ~S << 8; + upper -= 0x0100; /* Sign extend. */ + + addend = (upper << 12) | (lower << 1); + signed_addend = addend; + } + + /* ??? Should handle interworking? GCC might someday try to + use this for tail calls. */ + + relocation = value + signed_addend; + relocation -= (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + + check = relocation >> howto->rightshift; + + /* If this is a signed value, the rightshift just dropped + leading 1 bits (assuming twos complement). */ + if ((bfd_signed_vma) relocation >= 0) + signed_check = check; + else + signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); + + /* Assumes two's complement. */ + if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) + overflow = TRUE; + + /* Put RELOCATION back into the insn. */ + { + bfd_vma S = (relocation & 0x00100000) >> 20; + bfd_vma J2 = (relocation & 0x00080000) >> 19; + bfd_vma J1 = (relocation & 0x00040000) >> 18; + bfd_vma hi = (relocation & 0x0003f000) >> 12; + bfd_vma lo = (relocation & 0x00000ffe) >> 1; + + upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi; + lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo; + } + + /* Put the relocated value back in the object file: */ + bfd_put_16 (input_bfd, upper_insn, hit_data); + bfd_put_16 (input_bfd, lower_insn, hit_data + 2); + + return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); + } + + case R_ARM_THM_JUMP11: + case R_ARM_THM_JUMP8: + case R_ARM_THM_JUMP6: + /* Thumb B (branch) instruction). */ + { + bfd_signed_vma relocation; + bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; + bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; + bfd_signed_vma signed_check; + + /* CZB cannot jump backward. */ + if (r_type == R_ARM_THM_JUMP6) + reloc_signed_min = 0; + + if (globals->use_rel) + { + /* Need to refetch addend. */ + addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; + if (addend & ((howto->src_mask + 1) >> 1)) + { + signed_addend = -1; + signed_addend &= ~ howto->src_mask; + signed_addend |= addend; + } + else + signed_addend = addend; + /* The value in the insn has been right shifted. We need to + undo this, so that we can perform the address calculation + in terms of bytes. */ + signed_addend <<= howto->rightshift; + } + relocation = value + signed_addend; + + relocation -= (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + + relocation >>= howto->rightshift; + signed_check = relocation; + + if (r_type == R_ARM_THM_JUMP6) + relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3); + else + relocation &= howto->dst_mask; + relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); + + bfd_put_16 (input_bfd, relocation, hit_data); + + /* Assumes two's complement. */ + if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) + return bfd_reloc_overflow; + + return bfd_reloc_ok; + } + + case R_ARM_ALU_PCREL7_0: + case R_ARM_ALU_PCREL15_8: + case R_ARM_ALU_PCREL23_15: + { + bfd_vma insn; + bfd_vma relocation; + + insn = bfd_get_32 (input_bfd, hit_data); + if (globals->use_rel) + { + /* Extract the addend. */ + addend = (insn & 0xff) << ((insn & 0xf00) >> 7); + signed_addend = addend; + } + relocation = value + signed_addend; + + relocation -= (input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + insn = (insn & ~0xfff) + | ((howto->bitpos << 7) & 0xf00) + | ((relocation >> howto->bitpos) & 0xff); + bfd_put_32 (input_bfd, value, hit_data); + } + return bfd_reloc_ok; + + case R_ARM_GNU_VTINHERIT: + case R_ARM_GNU_VTENTRY: + return bfd_reloc_ok; + + case R_ARM_GOTOFF32: + /* Relocation is relative to the start of the + global offset table. */ + + BFD_ASSERT (sgot != NULL); + if (sgot == NULL) + return bfd_reloc_notsupported; + + /* If we are addressing a Thumb function, we need to adjust the + address by one, so that attempts to call the function pointer will + correctly interpret it as Thumb code. */ + if (sym_flags == STT_ARM_TFUNC) + value += 1; + + /* Note that sgot->output_offset is not involved in this + calculation. We always want the start of .got. If we + define _GLOBAL_OFFSET_TABLE in a different way, as is + permitted by the ABI, we might have to change this + calculation. */ + value -= sgot->output_section->vma; + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + + case R_ARM_GOTPC: + /* Use global offset table as symbol value. */ + BFD_ASSERT (sgot != NULL); + + if (sgot == NULL) + return bfd_reloc_notsupported; + + *unresolved_reloc_p = FALSE; + value = sgot->output_section->vma; + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + + case R_ARM_GOT32: + case R_ARM_GOT_PREL: + /* Relocation is to the entry for this symbol in the + global offset table. */ + if (sgot == NULL) + return bfd_reloc_notsupported; + + if (h != NULL) + { + bfd_vma off; + bfd_boolean dyn; + + off = h->got.offset; + BFD_ASSERT (off != (bfd_vma) -1); + dyn = globals->root.dynamic_sections_created; + + if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) + || (info->shared + && SYMBOL_REFERENCES_LOCAL (info, h)) + || (ELF_ST_VISIBILITY (h->other) + && h->root.type == bfd_link_hash_undefweak)) + { + /* This is actually a static link, or it is a -Bsymbolic link + and the symbol is defined locally. We must initialize this + entry in the global offset table. Since the offset must + always be a multiple of 4, we use the least significant bit + to record whether we have initialized it already. + + When doing a dynamic link, we create a .rel(a).got relocation + entry to initialize the value. This is done in the + finish_dynamic_symbol routine. */ + if ((off & 1) != 0) + off &= ~1; + else + { + /* If we are addressing a Thumb function, we need to + adjust the address by one, so that attempts to + call the function pointer will correctly + interpret it as Thumb code. */ + if (sym_flags == STT_ARM_TFUNC) + value |= 1; + + bfd_put_32 (output_bfd, value, sgot->contents + off); + h->got.offset |= 1; + } + } + else + *unresolved_reloc_p = FALSE; + + value = sgot->output_offset + off; + } + else + { + bfd_vma off; + + BFD_ASSERT (local_got_offsets != NULL && + local_got_offsets[r_symndx] != (bfd_vma) -1); + + off = local_got_offsets[r_symndx]; + + /* The offset must always be a multiple of 4. We use the + least significant bit to record whether we have already + generated the necessary reloc. */ + if ((off & 1) != 0) + off &= ~1; + else + { + /* If we are addressing a Thumb function, we need to + adjust the address by one, so that attempts to + call the function pointer will correctly + interpret it as Thumb code. */ + if (sym_flags == STT_ARM_TFUNC) + value |= 1; + + if (globals->use_rel) + bfd_put_32 (output_bfd, value, sgot->contents + off); + + if (info->shared) + { + asection * srelgot; + Elf_Internal_Rela outrel; + bfd_byte *loc; + + srelgot = (bfd_get_section_by_name + (dynobj, RELOC_SECTION (globals, ".got"))); + BFD_ASSERT (srelgot != NULL); + + outrel.r_addend = addend + value; + outrel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + off); + outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); + loc = srelgot->contents; + loc += srelgot->reloc_count++ * RELOC_SIZE (globals); + SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); + } + + local_got_offsets[r_symndx] |= 1; + } + + value = sgot->output_offset + off; + } + if (r_type != R_ARM_GOT32) + value += sgot->output_section->vma; + + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + + case R_ARM_TLS_LDO32: + value = value - dtpoff_base (info); + + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + + case R_ARM_TLS_LDM32: + { + bfd_vma off; + + if (globals->sgot == NULL) + abort (); + + off = globals->tls_ldm_got.offset; + + if ((off & 1) != 0) + off &= ~1; + else + { + /* If we don't know the module number, create a relocation + for it. */ + if (info->shared) + { + Elf_Internal_Rela outrel; + bfd_byte *loc; + + if (globals->srelgot == NULL) + abort (); + + outrel.r_addend = 0; + outrel.r_offset = (globals->sgot->output_section->vma + + globals->sgot->output_offset + off); + outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32); + + if (globals->use_rel) + bfd_put_32 (output_bfd, outrel.r_addend, + globals->sgot->contents + off); + + loc = globals->srelgot->contents; + loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals); + SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); + } + else + bfd_put_32 (output_bfd, 1, globals->sgot->contents + off); + + globals->tls_ldm_got.offset |= 1; + } + + value = globals->sgot->output_section->vma + globals->sgot->output_offset + off + - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); + + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + } + + case R_ARM_TLS_GD32: + case R_ARM_TLS_IE32: + { + bfd_vma off; + int indx; + char tls_type; + + if (globals->sgot == NULL) + abort (); + + indx = 0; + if (h != NULL) + { + bfd_boolean dyn; + dyn = globals->root.dynamic_sections_created; + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) + && (!info->shared + || !SYMBOL_REFERENCES_LOCAL (info, h))) + { + *unresolved_reloc_p = FALSE; + indx = h->dynindx; + } + off = h->got.offset; + tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type; + } + else + { + if (local_got_offsets == NULL) + abort (); + off = local_got_offsets[r_symndx]; + tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx]; + } + + if (tls_type == GOT_UNKNOWN) + abort (); + + if ((off & 1) != 0) + off &= ~1; + else + { + bfd_boolean need_relocs = FALSE; + Elf_Internal_Rela outrel; + bfd_byte *loc = NULL; + int cur_off = off; + + /* The GOT entries have not been initialized yet. Do it + now, and emit any relocations. If both an IE GOT and a + GD GOT are necessary, we emit the GD first. */ + + if ((info->shared || indx != 0) + && (h == NULL + || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak)) + { + need_relocs = TRUE; + if (globals->srelgot == NULL) + abort (); + loc = globals->srelgot->contents; + loc += globals->srelgot->reloc_count * RELOC_SIZE (globals); + } + + if (tls_type & GOT_TLS_GD) + { + if (need_relocs) + { + outrel.r_addend = 0; + outrel.r_offset = (globals->sgot->output_section->vma + + globals->sgot->output_offset + + cur_off); + outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32); + + if (globals->use_rel) + bfd_put_32 (output_bfd, outrel.r_addend, + globals->sgot->contents + cur_off); + + SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); + globals->srelgot->reloc_count++; + loc += RELOC_SIZE (globals); + + if (indx == 0) + bfd_put_32 (output_bfd, value - dtpoff_base (info), + globals->sgot->contents + cur_off + 4); + else + { + outrel.r_addend = 0; + outrel.r_info = ELF32_R_INFO (indx, + R_ARM_TLS_DTPOFF32); + outrel.r_offset += 4; + + if (globals->use_rel) + bfd_put_32 (output_bfd, outrel.r_addend, + globals->sgot->contents + cur_off + 4); + + + SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); + globals->srelgot->reloc_count++; + loc += RELOC_SIZE (globals); + } + } + else + { + /* If we are not emitting relocations for a + general dynamic reference, then we must be in a + static link or an executable link with the + symbol binding locally. Mark it as belonging + to module 1, the executable. */ + bfd_put_32 (output_bfd, 1, + globals->sgot->contents + cur_off); + bfd_put_32 (output_bfd, value - dtpoff_base (info), + globals->sgot->contents + cur_off + 4); + } + + cur_off += 8; + } + + if (tls_type & GOT_TLS_IE) + { + if (need_relocs) + { + if (indx == 0) + outrel.r_addend = value - dtpoff_base (info); + else + outrel.r_addend = 0; + outrel.r_offset = (globals->sgot->output_section->vma + + globals->sgot->output_offset + + cur_off); + outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32); + + if (globals->use_rel) + bfd_put_32 (output_bfd, outrel.r_addend, + globals->sgot->contents + cur_off); + + SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); + globals->srelgot->reloc_count++; + loc += RELOC_SIZE (globals); + } + else + bfd_put_32 (output_bfd, tpoff (info, value), + globals->sgot->contents + cur_off); + cur_off += 4; + } + + if (h != NULL) + h->got.offset |= 1; + else + local_got_offsets[r_symndx] |= 1; + } + + if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32) + off += 8; + value = globals->sgot->output_section->vma + globals->sgot->output_offset + off + - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); + + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + } + + case R_ARM_TLS_LE32: + if (info->shared) + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"), + input_bfd, input_section, + (long) rel->r_offset, howto->name); + return FALSE; + } + else + value = tpoff (info, value); + + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, value, + rel->r_addend); + + case R_ARM_V4BX: + if (globals->fix_v4bx) + { + bfd_vma insn = bfd_get_32 (input_bfd, hit_data); + + /* Ensure that we have a BX instruction. */ + BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10); + + /* Preserve Rm (lowest four bits) and the condition code + (highest four bits). Other bits encode MOV PC,Rm. */ + insn = (insn & 0xf000000f) | 0x01a0f000; + + bfd_put_32 (input_bfd, insn, hit_data); + } + return bfd_reloc_ok; + + default: + return bfd_reloc_notsupported; + } +} + + +static int +uleb128_size (unsigned int i) +{ + int size; + size = 1; + while (i >= 0x80) + { + i >>= 7; + size++; + } + return size; +} + +/* Return TRUE if the attribute has the default value (0/""). */ +static bfd_boolean +is_default_attr (aeabi_attribute *attr) +{ + if ((attr->type & 1) && attr->i != 0) + return FALSE; + if ((attr->type & 2) && attr->s && *attr->s) + return FALSE; + + return TRUE; +} + +/* Return the size of a single attribute. */ +static bfd_vma +eabi_attr_size(int tag, aeabi_attribute *attr) +{ + bfd_vma size; + + if (is_default_attr (attr)) + return 0; + + size = uleb128_size (tag); + if (attr->type & 1) + size += uleb128_size (attr->i); + if (attr->type & 2) + size += strlen ((char *)attr->s) + 1; + return size; +} + +/* Returns the size of the eabi object attributess section. */ +bfd_vma +elf32_arm_eabi_attr_size (bfd *abfd) +{ + bfd_vma size; + aeabi_attribute *attr; + aeabi_attribute_list *list; + int i; + + attr = elf32_arm_tdata (abfd)->known_eabi_attributes; + size = 16; /* 'A' <size> "aeabi" 0x1 <size>. */ + for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) + size += eabi_attr_size (i, &attr[i]); + + for (list = elf32_arm_tdata (abfd)->other_eabi_attributes; + list; + list = list->next) + size += eabi_attr_size (list->tag, &list->attr); + + return size; +} + +static bfd_byte * +write_uleb128 (bfd_byte *p, unsigned int val) +{ + bfd_byte c; + do + { + c = val & 0x7f; + val >>= 7; + if (val) + c |= 0x80; + *(p++) = c; + } + while (val); + return p; +} + +/* Write attribute ATTR to butter P, and return a pointer to the following + byte. */ +static bfd_byte * +write_eabi_attribute (bfd_byte *p, int tag, aeabi_attribute *attr) +{ + /* Suppress default entries. */ + if (is_default_attr(attr)) + return p; + + p = write_uleb128 (p, tag); + if (attr->type & 1) + p = write_uleb128 (p, attr->i); + if (attr->type & 2) + { + int len; + + len = strlen (attr->s) + 1; + memcpy (p, attr->s, len); + p += len; + } + + return p; +} + +/* Write the contents of the eabi attributes section to p. */ +void +elf32_arm_set_eabi_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size) +{ + bfd_byte *p; + aeabi_attribute *attr; + aeabi_attribute_list *list; + int i; + + p = contents; + *(p++) = 'A'; + bfd_put_32 (abfd, size - 1, p); + p += 4; + memcpy (p, "aeabi", 6); + p += 6; + *(p++) = Tag_File; + bfd_put_32 (abfd, size - 11, p); + p += 4; + + attr = elf32_arm_tdata (abfd)->known_eabi_attributes; + for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) + p = write_eabi_attribute (p, i, &attr[i]); + + for (list = elf32_arm_tdata (abfd)->other_eabi_attributes; + list; + list = list->next) + p = write_eabi_attribute (p, list->tag, &list->attr); +} + +/* Override final_link to handle EABI object attribute sections. */ + +static bfd_boolean +elf32_arm_bfd_final_link (bfd *abfd, struct bfd_link_info *info) +{ + asection *o; + struct bfd_link_order *p; + asection *attr_section = NULL; + bfd_byte *contents; + bfd_vma size = 0; + + /* elf32_arm_merge_private_bfd_data will already have merged the + object attributes. Remove the input sections from the link, and set + the contents of the output secton. */ + for (o = abfd->sections; o != NULL; o = o->next) + { + if (strcmp (o->name, ".ARM.attributes") == 0) + { + for (p = o->map_head.link_order; p != NULL; p = p->next) + { + asection *input_section; + + if (p->type != bfd_indirect_link_order) + continue; + input_section = p->u.indirect.section; + /* Hack: reset the SEC_HAS_CONTENTS flag so that + elf_link_input_bfd ignores this section. */ + input_section->flags &= ~SEC_HAS_CONTENTS; + } + + size = elf32_arm_eabi_attr_size (abfd); + bfd_set_section_size (abfd, o, size); + attr_section = o; + /* Skip this section later on. */ + o->map_head.link_order = NULL; + } + } + /* Invoke the ELF linker to do all the work. */ + if (!bfd_elf_final_link (abfd, info)) + return FALSE; + + if (attr_section) + { + contents = bfd_malloc(size); + if (contents == NULL) + return FALSE; + elf32_arm_set_eabi_attr_contents (abfd, contents, size); + bfd_set_section_contents (abfd, attr_section, contents, 0, size); + free (contents); + } + return TRUE; +} + + +/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ +static void +arm_add_to_rel (bfd * abfd, + bfd_byte * address, + reloc_howto_type * howto, + bfd_signed_vma increment) +{ + bfd_signed_vma addend; + + if (howto->type == R_ARM_THM_CALL) + { + int upper_insn, lower_insn; + int upper, lower; + + upper_insn = bfd_get_16 (abfd, address); + lower_insn = bfd_get_16 (abfd, address + 2); + upper = upper_insn & 0x7ff; + lower = lower_insn & 0x7ff; + + addend = (upper << 12) | (lower << 1); + addend += increment; + addend >>= 1; + + upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); + lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); + + bfd_put_16 (abfd, (bfd_vma) upper_insn, address); + bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); + } + else + { + bfd_vma contents; + + contents = bfd_get_32 (abfd, address); + + /* Get the (signed) value from the instruction. */ + addend = contents & howto->src_mask; + if (addend & ((howto->src_mask + 1) >> 1)) + { + bfd_signed_vma mask; + + mask = -1; + mask &= ~ howto->src_mask; + addend |= mask; + } + + /* Add in the increment, (which is a byte value). */ + switch (howto->type) + { + default: + addend += increment; + break; + + case R_ARM_PC24: + case R_ARM_PLT32: + case R_ARM_CALL: + case R_ARM_JUMP24: + addend <<= howto->size; + addend += increment; + + /* Should we check for overflow here ? */ + + /* Drop any undesired bits. */ + addend >>= howto->rightshift; + break; + } + + contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); + + bfd_put_32 (abfd, contents, address); + } +} + +#define IS_ARM_TLS_RELOC(R_TYPE) \ + ((R_TYPE) == R_ARM_TLS_GD32 \ + || (R_TYPE) == R_ARM_TLS_LDO32 \ + || (R_TYPE) == R_ARM_TLS_LDM32 \ + || (R_TYPE) == R_ARM_TLS_DTPOFF32 \ + || (R_TYPE) == R_ARM_TLS_DTPMOD32 \ + || (R_TYPE) == R_ARM_TLS_TPOFF32 \ + || (R_TYPE) == R_ARM_TLS_LE32 \ + || (R_TYPE) == R_ARM_TLS_IE32) + +/* Relocate an ARM ELF section. */ +static bfd_boolean +elf32_arm_relocate_section (bfd * output_bfd, + struct bfd_link_info * info, + bfd * input_bfd, + asection * input_section, + bfd_byte * contents, + Elf_Internal_Rela * relocs, + Elf_Internal_Sym * local_syms, + asection ** local_sections) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + Elf_Internal_Rela *rel; + Elf_Internal_Rela *relend; + const char *name; + struct elf32_arm_link_hash_table * globals; + + globals = elf32_arm_hash_table (info); + if (info->relocatable && !globals->use_rel) + return TRUE; + + symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + int r_type; + reloc_howto_type * howto; + unsigned long r_symndx; + Elf_Internal_Sym * sym; + asection * sec; + struct elf_link_hash_entry * h; + bfd_vma relocation; + bfd_reloc_status_type r; + arelent bfd_reloc; + char sym_type; + bfd_boolean unresolved_reloc = FALSE; + + r_symndx = ELF32_R_SYM (rel->r_info); + r_type = ELF32_R_TYPE (rel->r_info); + r_type = arm_real_reloc_type (globals, r_type); + + if ( r_type == R_ARM_GNU_VTENTRY + || r_type == R_ARM_GNU_VTINHERIT) + continue; + + bfd_reloc.howto = elf32_arm_howto_from_type (r_type); + howto = bfd_reloc.howto; + + if (info->relocatable && globals->use_rel) + { + /* 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 (ELF_ST_TYPE (sym->st_info) == STT_SECTION) + { + sec = local_sections[r_symndx]; + arm_add_to_rel (input_bfd, contents + rel->r_offset, + howto, + (bfd_signed_vma) (sec->output_offset + + sym->st_value)); + } + } + + continue; + } + + /* This is a final link. */ + h = NULL; + sym = NULL; + sec = NULL; + + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + sym_type = ELF32_ST_TYPE (sym->st_info); + sec = local_sections[r_symndx]; + if (globals->use_rel) + { + relocation = (sec->output_section->vma + + sec->output_offset + + sym->st_value); + if ((sec->flags & SEC_MERGE) + && ELF_ST_TYPE (sym->st_info) == STT_SECTION) + { + asection *msec; + bfd_vma addend, value; + + if (howto->rightshift) + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"), + input_bfd, input_section, + (long) rel->r_offset, howto->name); + return FALSE; + } + + value = bfd_get_32 (input_bfd, contents + rel->r_offset); + + /* Get the (signed) value from the instruction. */ + addend = value & howto->src_mask; + if (addend & ((howto->src_mask + 1) >> 1)) + { + bfd_signed_vma mask; + + mask = -1; + mask &= ~ howto->src_mask; + addend |= mask; + } + msec = sec; + addend = + _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) + - relocation; + addend += msec->output_section->vma + msec->output_offset; + value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); + bfd_put_32 (input_bfd, value, contents + rel->r_offset); + } + } + else + relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); + } + else + { + bfd_boolean warned; + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned); + + sym_type = h->type; + } + + if (h != NULL) + 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 || *name == '\0') + name = bfd_section_name (input_bfd, sec); + } + + if (r_symndx != 0 + && r_type != R_ARM_NONE + && (h == NULL + || h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS)) + { + (*_bfd_error_handler) + ((sym_type == STT_TLS + ? _("%B(%A+0x%lx): %s used with TLS symbol %s") + : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), + input_bfd, + input_section, + (long) rel->r_offset, + howto->name, + name); + } + + r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, + input_section, contents, rel, + relocation, info, sec, name, + (h ? ELF_ST_TYPE (h->type) : + ELF_ST_TYPE (sym->st_info)), h, + &unresolved_reloc); + + /* Dynamic relocs are not propagated for SEC_DEBUGGING sections + because such sections are not SEC_ALLOC and thus ld.so will + not process them. */ + if (unresolved_reloc + && !((input_section->flags & SEC_DEBUGGING) != 0 + && h->def_dynamic)) + { + (*_bfd_error_handler) + (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), + input_bfd, + input_section, + (long) rel->r_offset, + howto->name, + h->root.root.string); + return FALSE; + } + + if (r != bfd_reloc_ok) + { + const char * msg = (const char *) 0; + + switch (r) + { + case bfd_reloc_overflow: + /* If the overflowing reloc was to an undefined symbol, + we have already printed one error message and there + is no point complaining again. */ + if ((! h || + h->root.type != bfd_link_hash_undefined) + && (!((*info->callbacks->reloc_overflow) + (info, (h ? &h->root : NULL), name, howto->name, + (bfd_vma) 0, input_bfd, input_section, + rel->r_offset)))) + return FALSE; + break; + + case bfd_reloc_undefined: + if (!((*info->callbacks->undefined_symbol) + (info, name, input_bfd, input_section, + rel->r_offset, TRUE))) + return FALSE; + break; + + case bfd_reloc_outofrange: + msg = _("internal error: out of range error"); + goto common_error; + + case bfd_reloc_notsupported: + msg = _("internal error: unsupported relocation error"); + goto common_error; + + case bfd_reloc_dangerous: + msg = _("internal error: dangerous error"); + goto common_error; + + default: + msg = _("internal error: unknown error"); + /* fall through */ + + common_error: + if (!((*info->callbacks->warning) + (info, msg, name, input_bfd, input_section, + rel->r_offset))) + return FALSE; + break; + } + } + } + + return TRUE; +} + +/* Allocate/find an object attribute. */ +static aeabi_attribute * +elf32_arm_new_eabi_attr (bfd *abfd, int tag) +{ + aeabi_attribute *attr; + aeabi_attribute_list *list; + aeabi_attribute_list *p; + aeabi_attribute_list **lastp; + + + if (tag < NUM_KNOWN_ATTRIBUTES) + { + /* Knwon tags are preallocated. */ + attr = &elf32_arm_tdata (abfd)->known_eabi_attributes[tag]; + } + else + { + /* Create a new tag. */ + list = (aeabi_attribute_list *) + bfd_alloc (abfd, sizeof (aeabi_attribute_list)); + memset (list, 0, sizeof (aeabi_attribute_list)); + list->tag = tag; + /* Keep the tag list in order. */ + lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes; + for (p = *lastp; p; p = p->next) + { + if (tag < p->tag) + break; + lastp = &p->next; + } + list->next = *lastp; + *lastp = list; + attr = &list->attr; + } + + return attr; +} + +int +elf32_arm_get_eabi_attr_int (bfd *abfd, int tag) +{ + aeabi_attribute_list *p; + + if (tag < NUM_KNOWN_ATTRIBUTES) + { + /* Knwon tags are preallocated. */ + return elf32_arm_tdata (abfd)->known_eabi_attributes[tag].i; + } + else + { + for (p = elf32_arm_tdata (abfd)->other_eabi_attributes; + p; + p = p->next) + { + if (tag == p->tag) + return p->attr.i; + if (tag < p->tag) + break; + } + return 0; + } +} + +void +elf32_arm_add_eabi_attr_int (bfd *abfd, int tag, unsigned int i) +{ + aeabi_attribute *attr; + + attr = elf32_arm_new_eabi_attr (abfd, tag); + attr->type = 1; + attr->i = i; +} + +static char * +attr_strdup (bfd *abfd, const char * s) +{ + char * p; + int len; + + len = strlen (s) + 1; + p = (char *)bfd_alloc(abfd, len); + return memcpy (p, s, len); +} + +void +elf32_arm_add_eabi_attr_string (bfd *abfd, int tag, const char *s) +{ + aeabi_attribute *attr; + + attr = elf32_arm_new_eabi_attr (abfd, tag); + attr->type = 2; + attr->s = attr_strdup (abfd, s); +} + +void +elf32_arm_add_eabi_attr_compat (bfd *abfd, unsigned int i, const char *s) +{ + aeabi_attribute_list *list; + aeabi_attribute_list *p; + aeabi_attribute_list **lastp; + + list = (aeabi_attribute_list *) + bfd_alloc (abfd, sizeof (aeabi_attribute_list)); + memset (list, 0, sizeof (aeabi_attribute_list)); + list->tag = Tag_compatibility; + list->attr.type = 3; + list->attr.i = i; + list->attr.s = attr_strdup (abfd, s); + + lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes; + for (p = *lastp; p; p = p->next) + { + int cmp; + if (p->tag != Tag_compatibility) + break; + cmp = strcmp(s, p->attr.s); + if (cmp < 0 || (cmp == 0 && i < p->attr.i)) + break; + lastp = &p->next; + } + list->next = *lastp; + *lastp = list; +} + +/* Set the right machine number. */ + +static bfd_boolean +elf32_arm_object_p (bfd *abfd) +{ + unsigned int mach; + + mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); + + if (mach != bfd_mach_arm_unknown) + bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); + + else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) + bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); + + else + bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); + + return TRUE; +} + +/* Function to keep ARM specific flags in the ELF header. */ + +static bfd_boolean +elf32_arm_set_private_flags (bfd *abfd, flagword flags) +{ + if (elf_flags_init (abfd) + && elf_elfheader (abfd)->e_flags != flags) + { + if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) + { + if (flags & EF_ARM_INTERWORK) + (*_bfd_error_handler) + (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"), + abfd); + else + _bfd_error_handler + (_("Warning: Clearing the interworking flag of %B due to outside request"), + abfd); + } + } + else + { + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = TRUE; + } + + return TRUE; +} + +/* Copy the eabi object attribute from IBFD to OBFD. */ +static void +copy_eabi_attributes (bfd *ibfd, bfd *obfd) +{ + aeabi_attribute *in_attr; + aeabi_attribute *out_attr; + aeabi_attribute_list *list; + int i; + + in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes; + out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes; + for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) + { + out_attr->i = in_attr->i; + if (in_attr->s && *in_attr->s) + out_attr->s = attr_strdup (obfd, in_attr->s); + in_attr++; + out_attr++; + } + + for (list = elf32_arm_tdata (ibfd)->other_eabi_attributes; + list; + list = list->next) + { + in_attr = &list->attr; + switch (in_attr->type) + { + case 1: + elf32_arm_add_eabi_attr_int (obfd, list->tag, in_attr->i); + break; + case 2: + elf32_arm_add_eabi_attr_string (obfd, list->tag, in_attr->s); + break; + case 3: + elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s); + break; + default: + abort(); + } + } +} + + +/* Copy backend specific data from one object module to another. */ + +static bfd_boolean +elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + flagword in_flags; + flagword out_flags; + + if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + in_flags = elf_elfheader (ibfd)->e_flags; + out_flags = elf_elfheader (obfd)->e_flags; + + if (elf_flags_init (obfd) + && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN + && in_flags != out_flags) + { + /* Cannot mix APCS26 and APCS32 code. */ + if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) + return FALSE; + + /* Cannot mix float APCS and non-float APCS code. */ + if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) + return FALSE; + + /* If the src and dest have different interworking flags + then turn off the interworking bit. */ + if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) + { + if (out_flags & EF_ARM_INTERWORK) + _bfd_error_handler + (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"), + obfd, ibfd); + + in_flags &= ~EF_ARM_INTERWORK; + } + + /* Likewise for PIC, though don't warn for this case. */ + if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) + in_flags &= ~EF_ARM_PIC; + } + + elf_elfheader (obfd)->e_flags = in_flags; + elf_flags_init (obfd) = TRUE; + + /* Also copy the EI_OSABI field. */ + elf_elfheader (obfd)->e_ident[EI_OSABI] = + elf_elfheader (ibfd)->e_ident[EI_OSABI]; + + /* Copy EABI object attributes. */ + copy_eabi_attributes (ibfd, obfd); + + return TRUE; +} + +/* Values for Tag_ABI_PCS_R9_use. */ +enum +{ + AEABI_R9_V6, + AEABI_R9_SB, + AEABI_R9_TLS, + AEABI_R9_unused +}; + +/* Values for Tag_ABI_PCS_RW_data. */ +enum +{ + AEABI_PCS_RW_data_absolute, + AEABI_PCS_RW_data_PCrel, + AEABI_PCS_RW_data_SBrel, + AEABI_PCS_RW_data_unused +}; + +/* Values for Tag_ABI_enum_size. */ +enum +{ + AEABI_enum_unused, + AEABI_enum_short, + AEABI_enum_wide, + AEABI_enum_forced_wide +}; + +/* Merge EABI object attributes from IBFD into OBFD. Raise an error if there + are conflicting attributes. */ +static bfd_boolean +elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd) +{ + aeabi_attribute *in_attr; + aeabi_attribute *out_attr; + aeabi_attribute_list *in_list; + aeabi_attribute_list *out_list; + /* Some tags have 0 = don't care, 1 = strong requirement, + 2 = weak requirement. */ + static const int order_312[3] = {3, 1, 2}; + int i; + + if (!elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i) + { + /* This is the first object. Copy the attributes. */ + copy_eabi_attributes (ibfd, obfd); + return TRUE; + } + + /* Use the Tag_null value to indicate the attributes have been + initialized. */ + elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i = 1; + + in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes; + out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes; + /* This needs to happen before Tag_ABI_FP_number_model is merged. */ + if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i) + { + /* Ignore mismatches if teh object doesn't use floating point. */ + if (out_attr[Tag_ABI_FP_number_model].i == 0) + out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i; + else if (in_attr[Tag_ABI_FP_number_model].i != 0) + { + _bfd_error_handler + (_("ERROR: %B uses VFP register arguments, %B does not"), + ibfd, obfd); + return FALSE; + } + } + + for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) + { + /* Merge this attribute with existing attributes. */ + switch (i) + { + case Tag_CPU_raw_name: + case Tag_CPU_name: + /* Use whichever has the greatest architecture requirements. */ + if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i) + out_attr[i].s = attr_strdup(obfd, in_attr[i].s); + break; + + case Tag_ABI_optimization_goals: + case Tag_ABI_FP_optimization_goals: + /* Use the first value seen. */ + break; + + case Tag_CPU_arch: + case Tag_ARM_ISA_use: + case Tag_THUMB_ISA_use: + case Tag_VFP_arch: + case Tag_WMMX_arch: + case Tag_NEON_arch: + /* ??? Do NEON and WMMX conflict? */ + case Tag_ABI_FP_rounding: + case Tag_ABI_FP_denormal: + case Tag_ABI_FP_exceptions: + case Tag_ABI_FP_user_exceptions: + case Tag_ABI_FP_number_model: + case Tag_ABI_align8_preserved: + case Tag_ABI_HardFP_use: + /* Use the largest value specified. */ + if (in_attr[i].i > out_attr[i].i) + out_attr[i].i = in_attr[i].i; + break; + + case Tag_CPU_arch_profile: + /* Warn if conflicting architecture profiles used. */ + if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i) + { + _bfd_error_handler + (_("ERROR: %B: Conflicting architecture profiles %c/%c"), + ibfd, in_attr[i].i, out_attr[i].i); + return FALSE; + } + if (in_attr[i].i) + out_attr[i].i = in_attr[i].i; + break; + case Tag_PCS_config: + if (out_attr[i].i == 0) + out_attr[i].i = in_attr[i].i; + else if (in_attr[i].i != 0 && out_attr[i].i != 0) + { + /* It's sometimes ok to mix different configs, so this is only + a warning. */ + _bfd_error_handler + (_("Warning: %B: Conflicting platform configuration"), ibfd); + } + break; + case Tag_ABI_PCS_R9_use: + if (out_attr[i].i != AEABI_R9_unused + && in_attr[i].i != AEABI_R9_unused) + { + _bfd_error_handler + (_("ERROR: %B: Conflicting use of R9"), ibfd); + return FALSE; + } + if (out_attr[i].i == AEABI_R9_unused) + out_attr[i].i = in_attr[i].i; + break; + case Tag_ABI_PCS_RW_data: + if (in_attr[i].i == AEABI_PCS_RW_data_SBrel + && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB + && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused) + { + _bfd_error_handler + (_("ERROR: %B: SB relative addressing conflicts with use of R9"), + ibfd); + return FALSE; + } + /* Use the smallest value specified. */ + if (in_attr[i].i < out_attr[i].i) + out_attr[i].i = in_attr[i].i; + break; + case Tag_ABI_PCS_RO_data: + /* Use the smallest value specified. */ + if (in_attr[i].i < out_attr[i].i) + out_attr[i].i = in_attr[i].i; + break; + case Tag_ABI_PCS_GOT_use: + if (in_attr[i].i > 2 || out_attr[i].i > 2 + || order_312[in_attr[i].i] < order_312[out_attr[i].i]) + out_attr[i].i = in_attr[i].i; + break; + case Tag_ABI_PCS_wchar_t: + if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i) + { + _bfd_error_handler + (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd); + return FALSE; + } + if (in_attr[i].i) + out_attr[i].i = in_attr[i].i; + break; + case Tag_ABI_align8_needed: + /* ??? Check against Tag_ABI_align8_preserved. */ + if (in_attr[i].i > 2 || out_attr[i].i > 2 + || order_312[in_attr[i].i] < order_312[out_attr[i].i]) + out_attr[i].i = in_attr[i].i; + break; + case Tag_ABI_enum_size: + if (in_attr[i].i != AEABI_enum_unused) + { + if (out_attr[i].i == AEABI_enum_unused + || out_attr[i].i == AEABI_enum_forced_wide) + { + /* The existing object is compatible with anything. + Use whatever requirements the new object has. */ + out_attr[i].i = in_attr[i].i; + } + else if (in_attr[i].i != AEABI_enum_forced_wide + && out_attr[i].i != in_attr[i].i) + { + _bfd_error_handler + (_("ERROR: %B: Conflicting enum sizes"), ibfd); + } + } + break; + case Tag_ABI_VFP_args: + /* Aready done. */ + break; + case Tag_ABI_WMMX_args: + if (in_attr[i].i != out_attr[i].i) + { + _bfd_error_handler + (_("ERROR: %B uses iWMMXt register arguments, %B does not"), + ibfd, obfd); + return FALSE; + } + break; + default: /* All known attributes should be explicitly covered. */ + abort (); + } + } + + in_list = elf32_arm_tdata (ibfd)->other_eabi_attributes; + out_list = elf32_arm_tdata (ibfd)->other_eabi_attributes; + while (in_list && in_list->tag == Tag_compatibility) + { + in_attr = &in_list->attr; + if (in_attr->i == 0) + continue; + if (in_attr->i == 1) + { + _bfd_error_handler + (_("ERROR: %B: Must be processed by '%s' toolchain"), + ibfd, in_attr->s); + return FALSE; + } + if (!out_list || out_list->tag != Tag_compatibility + || strcmp (in_attr->s, out_list->attr.s) != 0) + { + /* Add this compatibility tag to the output. */ + elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s); + continue; + } + out_attr = &out_list->attr; + /* Check all the input tags with the same identifier. */ + for (;;) + { + if (out_list->tag != Tag_compatibility + || in_attr->i != out_attr->i + || strcmp (in_attr->s, out_attr->s) != 0) + { + _bfd_error_handler + (_("ERROR: %B: Incompatible object tag '%s':%d"), + ibfd, in_attr->s, in_attr->i); + return FALSE; + } + in_list = in_list->next; + if (in_list->tag != Tag_compatibility + || strcmp (in_attr->s, in_list->attr.s) != 0) + break; + in_attr = &in_list->attr; + out_list = out_list->next; + if (out_list) + out_attr = &out_list->attr; + } + + /* Check the output doesn't have extra tags with this identifier. */ + if (out_list && out_list->tag == Tag_compatibility + && strcmp (in_attr->s, out_list->attr.s) == 0) + { + _bfd_error_handler + (_("ERROR: %B: Incompatible object tag '%s':%d"), + ibfd, in_attr->s, out_list->attr.i); + return FALSE; + } + } + + for (; in_list; in_list = in_list->next) + { + if ((in_list->tag & 128) < 64) + { + _bfd_error_handler + (_("Warning: %B: Unknown EABI object attribute %d"), + ibfd, in_list->tag); + break; + } + } + return TRUE; +} + + +/* Return TRUE if the two EABI versions are incompatible. */ + +static bfd_boolean +elf32_arm_versions_compatible (unsigned iver, unsigned over) +{ + /* v4 and v5 are the same spec before and after it was released, + so allow mixing them. */ + if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5) + || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4)) + return TRUE; + + return (iver == over); +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ + +static bfd_boolean +elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd) +{ + flagword out_flags; + flagword in_flags; + bfd_boolean flags_compatible = TRUE; + asection *sec; + + /* Check if we have the same endianess. */ + if (! _bfd_generic_verify_endian_match (ibfd, obfd)) + return FALSE; + + if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + if (!elf32_arm_merge_eabi_attributes (ibfd, obfd)) + return FALSE; + + /* The input BFD must have had its flags initialised. */ + /* The following seems bogus to me -- The flags are initialized in + the assembler but I don't think an elf_flags_init field is + written into the object. */ + /* BFD_ASSERT (elf_flags_init (ibfd)); */ + + in_flags = elf_elfheader (ibfd)->e_flags; + out_flags = elf_elfheader (obfd)->e_flags; + + if (!elf_flags_init (obfd)) + { + /* If the input is the default architecture and had the default + flags then do not bother setting the flags for the output + architecture, instead allow future merges to do this. If no + future merges ever set these flags then they will retain their + uninitialised values, which surprise surprise, correspond + to the default values. */ + if (bfd_get_arch_info (ibfd)->the_default + && elf_elfheader (ibfd)->e_flags == 0) + return TRUE; + + elf_flags_init (obfd) = TRUE; + elf_elfheader (obfd)->e_flags = in_flags; + + if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) + && bfd_get_arch_info (obfd)->the_default) + return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); + + return TRUE; + } + + /* Determine what should happen if the input ARM architecture + does not match the output ARM architecture. */ + if (! bfd_arm_merge_machines (ibfd, obfd)) + return FALSE; + + /* Identical flags must be compatible. */ + if (in_flags == out_flags) + return TRUE; + + /* Check to see if the input BFD actually contains any sections. If + not, its flags may not have been initialised either, but it + cannot actually cause any incompatiblity. Do not short-circuit + dynamic objects; their section list may be emptied by + elf_link_add_object_symbols. + + Also check to see if there are no code sections in the input. + In this case there is no need to check for code specific flags. + XXX - do we need to worry about floating-point format compatability + in data sections ? */ + if (!(ibfd->flags & DYNAMIC)) + { + bfd_boolean null_input_bfd = TRUE; + bfd_boolean only_data_sections = TRUE; + + for (sec = ibfd->sections; sec != NULL; sec = sec->next) + { + /* Ignore synthetic glue sections. */ + if (strcmp (sec->name, ".glue_7") + && strcmp (sec->name, ".glue_7t")) + { + if ((bfd_get_section_flags (ibfd, sec) + & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) + == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) + only_data_sections = FALSE; + + null_input_bfd = FALSE; + break; + } + } + + if (null_input_bfd || only_data_sections) + return TRUE; + } + + /* Complain about various flag mismatches. */ + if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags), + EF_ARM_EABI_VERSION (out_flags))) + { + _bfd_error_handler + (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"), + ibfd, obfd, + (in_flags & EF_ARM_EABIMASK) >> 24, + (out_flags & EF_ARM_EABIMASK) >> 24); + return FALSE; + } + + /* Not sure what needs to be checked for EABI versions >= 1. */ + /* VxWorks libraries do not use these flags. */ + if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed + && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed + && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) + { + if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) + { + _bfd_error_handler + (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"), + ibfd, obfd, + in_flags & EF_ARM_APCS_26 ? 26 : 32, + out_flags & EF_ARM_APCS_26 ? 26 : 32); + flags_compatible = FALSE; + } + + if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) + { + if (in_flags & EF_ARM_APCS_FLOAT) + _bfd_error_handler + (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"), + ibfd, obfd); + else + _bfd_error_handler + (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"), + ibfd, obfd); + + flags_compatible = FALSE; + } + + if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) + { + if (in_flags & EF_ARM_VFP_FLOAT) + _bfd_error_handler + (_("ERROR: %B uses VFP instructions, whereas %B does not"), + ibfd, obfd); + else + _bfd_error_handler + (_("ERROR: %B uses FPA instructions, whereas %B does not"), + ibfd, obfd); + + flags_compatible = FALSE; + } + + if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT)) + { + if (in_flags & EF_ARM_MAVERICK_FLOAT) + _bfd_error_handler + (_("ERROR: %B uses Maverick instructions, whereas %B does not"), + ibfd, obfd); + else + _bfd_error_handler + (_("ERROR: %B does not use Maverick instructions, whereas %B does"), + ibfd, obfd); + + flags_compatible = FALSE; + } + +#ifdef EF_ARM_SOFT_FLOAT + if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) + { + /* We can allow interworking between code that is VFP format + layout, and uses either soft float or integer regs for + passing floating point arguments and results. We already + know that the APCS_FLOAT flags match; similarly for VFP + flags. */ + if ((in_flags & EF_ARM_APCS_FLOAT) != 0 + || (in_flags & EF_ARM_VFP_FLOAT) == 0) + { + if (in_flags & EF_ARM_SOFT_FLOAT) + _bfd_error_handler + (_("ERROR: %B uses software FP, whereas %B uses hardware FP"), + ibfd, obfd); + else + _bfd_error_handler + (_("ERROR: %B uses hardware FP, whereas %B uses software FP"), + ibfd, obfd); + + flags_compatible = FALSE; + } + } +#endif + + /* Interworking mismatch is only a warning. */ + if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) + { + if (in_flags & EF_ARM_INTERWORK) + { + _bfd_error_handler + (_("Warning: %B supports interworking, whereas %B does not"), + ibfd, obfd); + } + else + { + _bfd_error_handler + (_("Warning: %B does not support interworking, whereas %B does"), + ibfd, obfd); + } + } + } + + return flags_compatible; +} + +/* Display the flags field. */ + +static bfd_boolean +elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr) +{ + FILE * file = (FILE *) ptr; + unsigned long flags; + + BFD_ASSERT (abfd != NULL && ptr != NULL); + + /* Print normal ELF private data. */ + _bfd_elf_print_private_bfd_data (abfd, ptr); + + flags = elf_elfheader (abfd)->e_flags; + /* Ignore init flag - it may not be set, despite the flags field + containing valid data. */ + + /* xgettext:c-format */ + fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); + + switch (EF_ARM_EABI_VERSION (flags)) + { + case EF_ARM_EABI_UNKNOWN: + /* The following flag bits are GNU extensions and not part of the + official ARM ELF extended ABI. Hence they are only decoded if + the EABI version is not set. */ + if (flags & EF_ARM_INTERWORK) + fprintf (file, _(" [interworking enabled]")); + + if (flags & EF_ARM_APCS_26) + fprintf (file, " [APCS-26]"); + else + fprintf (file, " [APCS-32]"); + + if (flags & EF_ARM_VFP_FLOAT) + fprintf (file, _(" [VFP float format]")); + else if (flags & EF_ARM_MAVERICK_FLOAT) + fprintf (file, _(" [Maverick float format]")); + else + fprintf (file, _(" [FPA float format]")); + + if (flags & EF_ARM_APCS_FLOAT) + fprintf (file, _(" [floats passed in float registers]")); + + if (flags & EF_ARM_PIC) + fprintf (file, _(" [position independent]")); + + if (flags & EF_ARM_NEW_ABI) + fprintf (file, _(" [new ABI]")); + + if (flags & EF_ARM_OLD_ABI) + fprintf (file, _(" [old ABI]")); + + if (flags & EF_ARM_SOFT_FLOAT) + fprintf (file, _(" [software FP]")); + + flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT + | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI + | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT + | EF_ARM_MAVERICK_FLOAT); + break; + + case EF_ARM_EABI_VER1: + fprintf (file, _(" [Version1 EABI]")); + + if (flags & EF_ARM_SYMSARESORTED) + fprintf (file, _(" [sorted symbol table]")); + else + fprintf (file, _(" [unsorted symbol table]")); + + flags &= ~ EF_ARM_SYMSARESORTED; + break; + + case EF_ARM_EABI_VER2: + fprintf (file, _(" [Version2 EABI]")); + + if (flags & EF_ARM_SYMSARESORTED) + fprintf (file, _(" [sorted symbol table]")); + else + fprintf (file, _(" [unsorted symbol table]")); + + if (flags & EF_ARM_DYNSYMSUSESEGIDX) + fprintf (file, _(" [dynamic symbols use segment index]")); + + if (flags & EF_ARM_MAPSYMSFIRST) + fprintf (file, _(" [mapping symbols precede others]")); + + flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX + | EF_ARM_MAPSYMSFIRST); + break; + + case EF_ARM_EABI_VER3: + fprintf (file, _(" [Version3 EABI]")); + break; + + case EF_ARM_EABI_VER4: + fprintf (file, _(" [Version4 EABI]")); + goto eabi; + + case EF_ARM_EABI_VER5: + fprintf (file, _(" [Version5 EABI]")); + eabi: + if (flags & EF_ARM_BE8) + fprintf (file, _(" [BE8]")); + + if (flags & EF_ARM_LE8) + fprintf (file, _(" [LE8]")); + + flags &= ~(EF_ARM_LE8 | EF_ARM_BE8); + break; + + default: + fprintf (file, _(" <EABI version unrecognised>")); + break; + } + + flags &= ~ EF_ARM_EABIMASK; + + if (flags & EF_ARM_RELEXEC) + fprintf (file, _(" [relocatable executable]")); + + if (flags & EF_ARM_HASENTRY) + fprintf (file, _(" [has entry point]")); + + flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); + + if (flags) + fprintf (file, _("<Unrecognised flag bits set>")); + + fputc ('\n', file); + + return TRUE; +} + +static int +elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type) +{ + switch (ELF_ST_TYPE (elf_sym->st_info)) + { + case STT_ARM_TFUNC: + return ELF_ST_TYPE (elf_sym->st_info); + + case STT_ARM_16BIT: + /* If the symbol is not an object, return the STT_ARM_16BIT flag. + This allows us to distinguish between data used by Thumb instructions + and non-data (which is probably code) inside Thumb regions of an + executable. */ + if (type != STT_OBJECT && type != STT_TLS) + return ELF_ST_TYPE (elf_sym->st_info); + break; + + default: + break; + } + + return type; +} + +static asection * +elf32_arm_gc_mark_hook (asection * sec, + struct bfd_link_info * info ATTRIBUTE_UNUSED, + Elf_Internal_Rela * rel, + struct elf_link_hash_entry * h, + Elf_Internal_Sym * sym) +{ + if (h != NULL) + { + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_ARM_GNU_VTINHERIT: + case R_ARM_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 (sec->owner, sym->st_shndx); + + return NULL; +} + +/* Update the got entry reference counts for the section being removed. */ + +static bfd_boolean +elf32_arm_gc_sweep_hook (bfd * abfd, + struct bfd_link_info * info, + 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; + struct elf32_arm_link_hash_table * globals; + + globals = elf32_arm_hash_table (info); + + 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; + struct elf_link_hash_entry *h = NULL; + int r_type; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx >= symtab_hdr->sh_info) + { + 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; + } + + r_type = ELF32_R_TYPE (rel->r_info); + r_type = arm_real_reloc_type (globals, r_type); + switch (r_type) + { + case R_ARM_GOT32: + case R_ARM_GOT_PREL: + case R_ARM_TLS_GD32: + case R_ARM_TLS_IE32: + if (h != NULL) + { + if (h->got.refcount > 0) + h->got.refcount -= 1; + } + else if (local_got_refcounts != NULL) + { + if (local_got_refcounts[r_symndx] > 0) + local_got_refcounts[r_symndx] -= 1; + } + break; + + case R_ARM_TLS_LDM32: + elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1; + break; + + case R_ARM_ABS32: + case R_ARM_REL32: + case R_ARM_PC24: + case R_ARM_PLT32: + case R_ARM_CALL: + case R_ARM_JUMP24: + case R_ARM_PREL31: + case R_ARM_THM_CALL: + /* Should the interworking branches be here also? */ + + if (h != NULL) + { + struct elf32_arm_link_hash_entry *eh; + struct elf32_arm_relocs_copied **pp; + struct elf32_arm_relocs_copied *p; + + eh = (struct elf32_arm_link_hash_entry *) h; + + if (h->plt.refcount > 0) + { + h->plt.refcount -= 1; + if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL) + eh->plt_thumb_refcount--; + } + + if (r_type == R_ARM_ABS32 + || r_type == R_ARM_REL32) + { + for (pp = &eh->relocs_copied; (p = *pp) != NULL; + pp = &p->next) + if (p->section == sec) + { + p->count -= 1; + if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32) + p->pc_count -= 1; + if (p->count == 0) + *pp = p->next; + break; + } + } + } + break; + + default: + break; + } + } + + return TRUE; +} + +/* Look through the relocs for a section during the first phase. */ + +static bfd_boolean +elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + struct elf_link_hash_entry **sym_hashes_end; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + bfd *dynobj; + asection *sreloc; + bfd_vma *local_got_offsets; + struct elf32_arm_link_hash_table *htab; + + if (info->relocatable) + return TRUE; + + htab = elf32_arm_hash_table (info); + sreloc = NULL; + + /* Create dynamic sections for relocatable executables so that we can + copy relocations. */ + if (htab->root.is_relocatable_executable + && ! htab->root.dynamic_sections_created) + { + if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) + return FALSE; + } + + dynobj = elf_hash_table (info)->dynobj; + local_got_offsets = elf_local_got_offsets (abfd); + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + sym_hashes_end = sym_hashes + + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); + + if (!elf_bad_symtab (abfd)) + sym_hashes_end -= symtab_hdr->sh_info; + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + struct elf_link_hash_entry *h; + struct elf32_arm_link_hash_entry *eh; + unsigned long r_symndx; + int r_type; + + r_symndx = ELF32_R_SYM (rel->r_info); + r_type = ELF32_R_TYPE (rel->r_info); + r_type = arm_real_reloc_type (htab, r_type); + + if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) + { + (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, + r_symndx); + return FALSE; + } + + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + { + 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; + } + + eh = (struct elf32_arm_link_hash_entry *) h; + + switch (r_type) + { + case R_ARM_GOT32: + case R_ARM_GOT_PREL: + case R_ARM_TLS_GD32: + case R_ARM_TLS_IE32: + /* This symbol requires a global offset table entry. */ + { + int tls_type, old_tls_type; + + switch (r_type) + { + case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break; + case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break; + default: tls_type = GOT_NORMAL; break; + } + + if (h != NULL) + { + h->got.refcount++; + old_tls_type = elf32_arm_hash_entry (h)->tls_type; + } + 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) + sizeof(char)); + local_got_refcounts = bfd_zalloc (abfd, size); + if (local_got_refcounts == NULL) + return FALSE; + elf_local_got_refcounts (abfd) = local_got_refcounts; + elf32_arm_local_got_tls_type (abfd) + = (char *) (local_got_refcounts + symtab_hdr->sh_info); + } + local_got_refcounts[r_symndx] += 1; + old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx]; + } + + /* We will already have issued an error message if there is a + TLS / non-TLS mismatch, based on the symbol type. We don't + support any linker relaxations. So just combine any TLS + types needed. */ + if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL + && tls_type != GOT_NORMAL) + tls_type |= old_tls_type; + + if (old_tls_type != tls_type) + { + if (h != NULL) + elf32_arm_hash_entry (h)->tls_type = tls_type; + else + elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type; + } + } + /* Fall through */ + + case R_ARM_TLS_LDM32: + if (r_type == R_ARM_TLS_LDM32) + htab->tls_ldm_got.refcount++; + /* Fall through */ + + case R_ARM_GOTOFF32: + case R_ARM_GOTPC: + if (htab->sgot == NULL) + { + if (htab->root.dynobj == NULL) + htab->root.dynobj = abfd; + if (!create_got_section (htab->root.dynobj, info)) + return FALSE; + } + break; + + case R_ARM_ABS12: + /* VxWorks uses dynamic R_ARM_ABS12 relocations for + ldr __GOTT_INDEX__ offsets. */ + if (!htab->vxworks_p) + break; + /* Fall through */ + + case R_ARM_ABS32: + case R_ARM_REL32: + case R_ARM_PC24: + case R_ARM_PLT32: + case R_ARM_CALL: + case R_ARM_JUMP24: + case R_ARM_PREL31: + case R_ARM_THM_CALL: + /* Should the interworking branches be listed here? */ + if (h != NULL) + { + /* If this reloc is in a read-only section, we might + need a copy reloc. We can't check reliably at this + stage whether the section is read-only, as input + sections have not yet been mapped to output sections. + Tentatively set the flag for now, and correct in + adjust_dynamic_symbol. */ + if (!info->shared) + h->non_got_ref = 1; + + /* We may need a .plt entry if the function this reloc + refers to is in a different object. We can't tell for + sure yet, because something later might force the + symbol local. */ + if (r_type == R_ARM_PC24 + || r_type == R_ARM_CALL + || r_type == R_ARM_JUMP24 + || r_type == R_ARM_PREL31 + || r_type == R_ARM_PLT32 + || r_type == R_ARM_THM_CALL) + h->needs_plt = 1; + + /* If we create a PLT entry, this relocation will reference + it, even if it's an ABS32 relocation. */ + h->plt.refcount += 1; + + if (r_type == R_ARM_THM_CALL) + eh->plt_thumb_refcount += 1; + } + + /* If we are creating a shared library or relocatable executable, + 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). We account for that + possibility below by storing information in the + relocs_copied field of the hash table entry. */ + if ((info->shared || htab->root.is_relocatable_executable) + && (sec->flags & SEC_ALLOC) != 0 + && (r_type == R_ARM_ABS32 + || (h != NULL && ! h->needs_plt + && (! info->symbolic || ! h->def_regular)))) + { + struct elf32_arm_relocs_copied *p, **head; + + /* When creating a shared object, we must copy these + reloc types into the output file. We create a reloc + section in dynobj and make room for this reloc. */ + if (sreloc == NULL) + { + const char * name; + + 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; + + BFD_ASSERT (reloc_section_p (htab, name, sec)); + + sreloc = bfd_get_section_by_name (dynobj, name); + if (sreloc == NULL) + { + flagword flags; + + flags = (SEC_HAS_CONTENTS | SEC_READONLY + | SEC_IN_MEMORY | SEC_LINKER_CREATED); + if ((sec->flags & SEC_ALLOC) != 0 + /* BPABI objects never have dynamic + relocations mapped. */ + && !htab->symbian_p) + flags |= SEC_ALLOC | SEC_LOAD; + sreloc = bfd_make_section_with_flags (dynobj, + name, + flags); + if (sreloc == NULL + || ! bfd_set_section_alignment (dynobj, sreloc, 2)) + 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 elf32_arm_link_hash_entry *) h)->relocs_copied; + } + else + { + /* Track dynamic relocs needed for local syms too. + We really need local syms available to do this + easily. Oh well. */ + + asection *s; + void *vpp; + + s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, + sec, r_symndx); + if (s == NULL) + return FALSE; + + vpp = &elf_section_data (s)->local_dynrel; + head = (struct elf32_arm_relocs_copied **) vpp; + } + + p = *head; + if (p == NULL || p->section != sec) + { + bfd_size_type amt = sizeof *p; + + p = bfd_alloc (htab->root.dynobj, amt); + if (p == NULL) + return FALSE; + p->next = *head; + *head = p; + p->section = sec; + p->count = 0; + p->pc_count = 0; + } + + if (r_type == R_ARM_REL32) + p->pc_count += 1; + p->count += 1; + } + break; + + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_ARM_GNU_VTINHERIT: + if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return FALSE; + break; + + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_ARM_GNU_VTENTRY: + if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) + return FALSE; + break; + } + } + + return TRUE; +} + +/* Treat mapping symbols as special target symbols. */ + +static bfd_boolean +elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym) +{ + return bfd_is_arm_mapping_symbol_name (sym->name); +} + +/* This is a copy of elf_find_function() from elf.c except that + ARM mapping symbols are ignored when looking for function names + and STT_ARM_TFUNC is considered to a function type. */ + +static bfd_boolean +arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED, + asection * section, + asymbol ** symbols, + bfd_vma offset, + const char ** filename_ptr, + const char ** functionname_ptr) +{ + const char * filename = NULL; + asymbol * func = NULL; + bfd_vma low_func = 0; + asymbol ** p; + + for (p = symbols; *p != NULL; p++) + { + elf_symbol_type *q; + + q = (elf_symbol_type *) *p; + + switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) + { + default: + break; + case STT_FILE: + filename = bfd_asymbol_name (&q->symbol); + break; + case STT_FUNC: + case STT_ARM_TFUNC: + case STT_NOTYPE: + /* Skip $a and $t symbols. */ + if ((q->symbol.flags & BSF_LOCAL) + && bfd_is_arm_mapping_symbol_name (q->symbol.name)) + continue; + /* Fall through. */ + if (bfd_get_section (&q->symbol) == section + && q->symbol.value >= low_func + && q->symbol.value <= offset) + { + func = (asymbol *) q; + low_func = q->symbol.value; + } + break; + } + } + + if (func == NULL) + return FALSE; + + if (filename_ptr) + *filename_ptr = filename; + if (functionname_ptr) + *functionname_ptr = bfd_asymbol_name (func); + + return TRUE; +} + + +/* Find the nearest line to a particular section and offset, for error + reporting. This code is a duplicate of the code in elf.c, except + that it uses arm_elf_find_function. */ + +static bfd_boolean +elf32_arm_find_nearest_line (bfd * abfd, + asection * section, + asymbol ** symbols, + bfd_vma offset, + const char ** filename_ptr, + const char ** functionname_ptr, + unsigned int * line_ptr) +{ + bfd_boolean found = FALSE; + + /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */ + + if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, + filename_ptr, functionname_ptr, + line_ptr, 0, + & elf_tdata (abfd)->dwarf2_find_line_info)) + { + if (!*functionname_ptr) + arm_elf_find_function (abfd, section, symbols, offset, + *filename_ptr ? NULL : filename_ptr, + functionname_ptr); + + return TRUE; + } + + if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, + & found, filename_ptr, + functionname_ptr, line_ptr, + & elf_tdata (abfd)->line_info)) + return FALSE; + + if (found && (*functionname_ptr || *line_ptr)) + return TRUE; + + if (symbols == NULL) + return FALSE; + + if (! arm_elf_find_function (abfd, section, symbols, offset, + filename_ptr, functionname_ptr)) + return FALSE; + + *line_ptr = 0; + return TRUE; +} + +static bfd_boolean +elf32_arm_find_inliner_info (bfd * abfd, + const char ** filename_ptr, + const char ** functionname_ptr, + unsigned int * line_ptr) +{ + bfd_boolean found; + found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, + functionname_ptr, line_ptr, + & elf_tdata (abfd)->dwarf2_find_line_info); + return found; +} + +/* Adjust a symbol defined by a dynamic object and referenced by a + regular object. The current definition is in some section of the + dynamic object, but we're not including those sections. We have to + change the definition to something the rest of the link can + understand. */ + +static bfd_boolean +elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, + struct elf_link_hash_entry * h) +{ + bfd * dynobj; + asection * s; + unsigned int power_of_two; + struct elf32_arm_link_hash_entry * eh; + struct elf32_arm_link_hash_table *globals; + + globals = elf32_arm_hash_table (info); + dynobj = elf_hash_table (info)->dynobj; + + /* Make sure we know what is going on here. */ + BFD_ASSERT (dynobj != NULL + && (h->needs_plt + || h->u.weakdef != NULL + || (h->def_dynamic + && h->ref_regular + && !h->def_regular))); + + eh = (struct elf32_arm_link_hash_entry *) h; + + /* If this is a function, put it in the procedure linkage table. We + will fill in the contents of the procedure linkage table later, + when we know the address of the .got section. */ + if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC + || h->needs_plt) + { + if (h->plt.refcount <= 0 + || SYMBOL_CALLS_LOCAL (info, h) + || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak)) + { + /* This case can occur if we saw a PLT32 reloc in an input + file, but the symbol was never referred to by a dynamic + object, or if all references were garbage collected. In + such a case, we don't actually need to build a procedure + linkage table, and we can just do a PC24 reloc instead. */ + h->plt.offset = (bfd_vma) -1; + eh->plt_thumb_refcount = 0; + h->needs_plt = 0; + } + + return TRUE; + } + else + { + /* It's possible that we incorrectly decided a .plt reloc was + needed for an R_ARM_PC24 or similar reloc to a non-function sym + in check_relocs. We can't decide accurately between function + and non-function syms in check-relocs; Objects loaded later in + the link may change h->type. So fix it now. */ + h->plt.offset = (bfd_vma) -1; + eh->plt_thumb_refcount = 0; + } + + /* 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->u.weakdef != NULL) + { + BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined + || h->u.weakdef->root.type == bfd_link_hash_defweak); + h->root.u.def.section = h->u.weakdef->root.u.def.section; + h->root.u.def.value = h->u.weakdef->root.u.def.value; + return TRUE; + } + + /* If there are no non-GOT references, we do not need a copy + relocation. */ + if (!h->non_got_ref) + 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. Relocatable executables + can reference data in shared objects directly, so we don't need to + do anything here. */ + if (info->shared || globals->root.is_relocatable_executable) + return TRUE; + + if (h->size == 0) + { + (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), + h->root.root.string); + 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. */ + s = bfd_get_section_by_name (dynobj, ".dynbss"); + BFD_ASSERT (s != NULL); + + /* We must generate a R_ARM_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 + .rel(a).bss section we are going to use. */ + if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) + { + asection *srel; + + srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss")); + BFD_ASSERT (srel != NULL); + srel->size += RELOC_SIZE (globals); + h->needs_copy = 1; + } + + /* 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 > 3) + power_of_two = 3; + + /* Apply the required alignment. */ + s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); + if (power_of_two > bfd_get_section_alignment (dynobj, s)) + { + if (! bfd_set_section_alignment (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->size; + + /* Increment the section size to make room for the symbol. */ + s->size += h->size; + + return TRUE; +} + +/* Allocate space in .plt, .got and associated reloc sections for + dynamic relocs. */ + +static bfd_boolean +allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) +{ + struct bfd_link_info *info; + struct elf32_arm_link_hash_table *htab; + struct elf32_arm_link_hash_entry *eh; + struct elf32_arm_relocs_copied *p; + + eh = (struct elf32_arm_link_hash_entry *) h; + + if (h->root.type == bfd_link_hash_indirect) + return TRUE; + + if (h->root.type == bfd_link_hash_warning) + /* When warning symbols are created, they **replace** the "real" + entry in the hash table, thus we never get to see the real + symbol in a hash traversal. So look at it now. */ + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + info = (struct bfd_link_info *) inf; + htab = elf32_arm_hash_table (info); + + if (htab->root.dynamic_sections_created + && h->plt.refcount > 0) + { + /* Make sure this symbol is output as a dynamic symbol. + Undefined weak syms won't yet be marked as dynamic. */ + if (h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + if (info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) + { + asection *s = htab->splt; + + /* If this is the first .plt entry, make room for the special + first entry. */ + if (s->size == 0) + s->size += htab->plt_header_size; + + h->plt.offset = s->size; + + /* If we will insert a Thumb trampoline before this PLT, leave room + for it. */ + if (!htab->use_blx && eh->plt_thumb_refcount > 0) + { + h->plt.offset += PLT_THUMB_STUB_SIZE; + s->size += PLT_THUMB_STUB_SIZE; + } + + /* If this symbol is not defined in a regular file, and we are + not generating a shared library, then set the symbol to this + location in the .plt. This is required to make function + pointers compare as equal between the normal executable and + the shared library. */ + if (! info->shared + && !h->def_regular) + { + h->root.u.def.section = s; + h->root.u.def.value = h->plt.offset; + + /* Make sure the function is not marked as Thumb, in case + it is the target of an ABS32 relocation, which will + point to the PLT entry. */ + if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC) + h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC); + } + + /* Make room for this entry. */ + s->size += htab->plt_entry_size; + + if (!htab->symbian_p) + { + /* We also need to make an entry in the .got.plt section, which + will be placed in the .got section by the linker script. */ + eh->plt_got_offset = htab->sgotplt->size; + htab->sgotplt->size += 4; + } + + /* We also need to make an entry in the .rel(a).plt section. */ + htab->srelplt->size += RELOC_SIZE (htab); + + /* VxWorks executables have a second set of relocations for + each PLT entry. They go in a separate relocation section, + which is processed by the kernel loader. */ + if (htab->vxworks_p && !info->shared) + { + /* There is a relocation for the initial PLT entry: + an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */ + if (h->plt.offset == htab->plt_header_size) + htab->srelplt2->size += RELOC_SIZE (htab); + + /* There are two extra relocations for each subsequent + PLT entry: an R_ARM_32 relocation for the GOT entry, + and an R_ARM_32 relocation for the PLT entry. */ + htab->srelplt2->size += RELOC_SIZE (htab) * 2; + } + } + else + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + } + else + { + h->plt.offset = (bfd_vma) -1; + h->needs_plt = 0; + } + + if (h->got.refcount > 0) + { + asection *s; + bfd_boolean dyn; + int tls_type = elf32_arm_hash_entry (h)->tls_type; + int indx; + + /* 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->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + if (!htab->symbian_p) + { + s = htab->sgot; + h->got.offset = s->size; + + if (tls_type == GOT_UNKNOWN) + abort (); + + if (tls_type == GOT_NORMAL) + /* Non-TLS symbols need one GOT slot. */ + s->size += 4; + else + { + if (tls_type & GOT_TLS_GD) + /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */ + s->size += 8; + if (tls_type & GOT_TLS_IE) + /* R_ARM_TLS_IE32 needs one GOT slot. */ + s->size += 4; + } + + dyn = htab->root.dynamic_sections_created; + + indx = 0; + if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) + && (!info->shared + || !SYMBOL_REFERENCES_LOCAL (info, h))) + indx = h->dynindx; + + if (tls_type != GOT_NORMAL + && (info->shared || indx != 0) + && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak)) + { + if (tls_type & GOT_TLS_IE) + htab->srelgot->size += RELOC_SIZE (htab); + + if (tls_type & GOT_TLS_GD) + htab->srelgot->size += RELOC_SIZE (htab); + + if ((tls_type & GOT_TLS_GD) && indx != 0) + htab->srelgot->size += RELOC_SIZE (htab); + } + else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT + || h->root.type != bfd_link_hash_undefweak) + && (info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) + htab->srelgot->size += RELOC_SIZE (htab); + } + } + else + h->got.offset = (bfd_vma) -1; + + if (eh->relocs_copied == 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 pc-relative relocs that have become local due to symbol + visibility changes. */ + + if (info->shared || htab->root.is_relocatable_executable) + { + /* The only reloc that uses pc_count is R_ARM_REL32, which will + appear on something like ".long foo - .". We want calls to + protected symbols to resolve directly to the function rather + than going via the plt. If people want function pointer + comparisons to work as expected then they should avoid + writing assembly like ".long foo - .". */ + if (SYMBOL_CALLS_LOCAL (info, h)) + { + struct elf32_arm_relocs_copied **pp; + + for (pp = &eh->relocs_copied; (p = *pp) != NULL; ) + { + p->count -= p->pc_count; + p->pc_count = 0; + if (p->count == 0) + *pp = p->next; + else + pp = &p->next; + } + } + + /* Also discard relocs on undefined weak syms with non-default + visibility. */ + if (eh->relocs_copied != NULL + && h->root.type == bfd_link_hash_undefweak) + { + if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) + eh->relocs_copied = NULL; + + /* Make sure undefined weak symbols are output as a dynamic + symbol in PIEs. */ + else if (h->dynindx == -1 + && !h->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + } + + else if (htab->root.is_relocatable_executable && h->dynindx == -1 + && h->root.type == bfd_link_hash_new) + { + /* Output absolute symbols so that we can create relocations + against them. For normal symbols we output a relocation + against the section that contains them. */ + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + } + 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->non_got_ref + && ((h->def_dynamic + && !h->def_regular) + || (htab->root.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->forced_local) + { + if (! bfd_elf_link_record_dynamic_symbol (info, h)) + return FALSE; + } + + /* If that succeeded, we know we'll be keeping all the + relocs. */ + if (h->dynindx != -1) + goto keep; + } + + eh->relocs_copied = NULL; + + keep: ; + } + + /* Finally, allocate space. */ + for (p = eh->relocs_copied; p != NULL; p = p->next) + { + asection *sreloc = elf_section_data (p->section)->sreloc; + sreloc->size += p->count * RELOC_SIZE (htab); + } + + return TRUE; +} + +/* Find any dynamic relocs that apply to read-only sections. */ + +static bfd_boolean +elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf) +{ + struct elf32_arm_link_hash_entry *eh; + struct elf32_arm_relocs_copied *p; + + if (h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + eh = (struct elf32_arm_link_hash_entry *) h; + for (p = eh->relocs_copied; p != NULL; p = p->next) + { + asection *s = p->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 bfd_boolean +elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info * info) +{ + bfd * dynobj; + asection * s; + bfd_boolean plt; + bfd_boolean relocs; + bfd *ibfd; + struct elf32_arm_link_hash_table *htab; + + htab = elf32_arm_hash_table (info); + dynobj = elf_hash_table (info)->dynobj; + BFD_ASSERT (dynobj != NULL); + check_use_blx (htab); + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Set the contents of the .interp section to the interpreter. */ + if (info->executable) + { + s = bfd_get_section_by_name (dynobj, ".interp"); + BFD_ASSERT (s != NULL); + s->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; + char *local_tls_type; + 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 elf32_arm_relocs_copied *p; + + for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) + { + if (!bfd_is_abs_section (p->section) + && bfd_is_abs_section (p->section->output_section)) + { + /* Input section has been discarded, either because + it is a copy of a linkonce section or due to + linker script /DISCARD/, so we'll be discarding + the relocs too. */ + } + else if (p->count != 0) + { + srel = elf_section_data (p->section)->sreloc; + srel->size += p->count * RELOC_SIZE (htab); + if ((p->section->output_section->flags & SEC_READONLY) != 0) + info->flags |= DF_TEXTREL; + } + } + } + + 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; + local_tls_type = elf32_arm_local_got_tls_type (ibfd); + s = htab->sgot; + srel = htab->srelgot; + for (; local_got < end_local_got; ++local_got, ++local_tls_type) + { + if (*local_got > 0) + { + *local_got = s->size; + if (*local_tls_type & GOT_TLS_GD) + /* TLS_GD relocs need an 8-byte structure in the GOT. */ + s->size += 8; + if (*local_tls_type & GOT_TLS_IE) + s->size += 4; + if (*local_tls_type == GOT_NORMAL) + s->size += 4; + + if (info->shared || *local_tls_type == GOT_TLS_GD) + srel->size += RELOC_SIZE (htab); + } + else + *local_got = (bfd_vma) -1; + } + } + + if (htab->tls_ldm_got.refcount > 0) + { + /* Allocate two GOT entries and one dynamic relocation (if necessary) + for R_ARM_TLS_LDM32 relocations. */ + htab->tls_ldm_got.offset = htab->sgot->size; + htab->sgot->size += 8; + if (info->shared) + htab->srelgot->size += RELOC_SIZE (htab); + } + else + htab->tls_ldm_got.offset = -1; + + /* Allocate global sym .plt and .got entries, and space for global + sym dynamic relocs. */ + elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); + + /* The check_relocs and adjust_dynamic_symbol entry points have + determined the sizes of the various dynamic sections. Allocate + memory for them. */ + plt = FALSE; + relocs = FALSE; + for (s = dynobj->sections; s != NULL; s = s->next) + { + const char * name; + + if ((s->flags & SEC_LINKER_CREATED) == 0) + continue; + + /* It's OK to base decisions on the section name, because none + of the dynobj section names depend upon the input files. */ + name = bfd_get_section_name (dynobj, s); + + if (strcmp (name, ".plt") == 0) + { + /* Remember whether there is a PLT. */ + plt = s->size != 0; + } + else if (strncmp (name, ".rel", 4) == 0) + { + if (s->size != 0) + { + /* Remember whether there are any reloc sections other + than .rel(a).plt and .rela.plt.unloaded. */ + if (s != htab->srelplt && s != htab->srelplt2) + 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 if (strncmp (name, ".got", 4) != 0 + && strcmp (name, ".dynbss") != 0) + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } + + if (s->size == 0) + { + /* If we don't need this section, strip it from the + output file. This is mostly to handle .rel(a).bss and + .rel(a).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. */ + s->flags |= SEC_EXCLUDE; + continue; + } + + if ((s->flags & SEC_HAS_CONTENTS) == 0) + continue; + + /* Allocate memory for the section contents. */ + s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); + if (s->contents == NULL) + return FALSE; + } + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in elf32_arm_finish_dynamic_sections, but we + must add the entries now so that we get the correct size for + the .dynamic section. The DT_DEBUG entry is filled in by the + dynamic linker and used by the debugger. */ +#define add_dynamic_entry(TAG, VAL) \ + _bfd_elf_add_dynamic_entry (info, TAG, VAL) + + if (info->executable) + { + if (!add_dynamic_entry (DT_DEBUG, 0)) + return FALSE; + } + + if (plt) + { + if ( !add_dynamic_entry (DT_PLTGOT, 0) + || !add_dynamic_entry (DT_PLTRELSZ, 0) + || !add_dynamic_entry (DT_PLTREL, + htab->use_rel ? DT_REL : DT_RELA) + || !add_dynamic_entry (DT_JMPREL, 0)) + return FALSE; + } + + if (relocs) + { + if (htab->use_rel) + { + if (!add_dynamic_entry (DT_REL, 0) + || !add_dynamic_entry (DT_RELSZ, 0) + || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab))) + return FALSE; + } + else + { + if (!add_dynamic_entry (DT_RELA, 0) + || !add_dynamic_entry (DT_RELASZ, 0) + || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) + return FALSE; + } + } + + /* If any dynamic relocs apply to a read-only section, + then we need a DT_TEXTREL entry. */ + if ((info->flags & DF_TEXTREL) == 0) + elf_link_hash_traverse (&htab->root, elf32_arm_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; +} + +/* Finish up dynamic symbol handling. We set the contents of various + dynamic sections here. */ + +static bfd_boolean +elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info, + struct elf_link_hash_entry * h, Elf_Internal_Sym * sym) +{ + bfd * dynobj; + struct elf32_arm_link_hash_table *htab; + struct elf32_arm_link_hash_entry *eh; + + dynobj = elf_hash_table (info)->dynobj; + htab = elf32_arm_hash_table (info); + eh = (struct elf32_arm_link_hash_entry *) h; + + if (h->plt.offset != (bfd_vma) -1) + { + asection * splt; + asection * srel; + bfd_byte *loc; + bfd_vma plt_index; + Elf_Internal_Rela rel; + + /* This symbol has an entry in the procedure linkage table. Set + it up. */ + + BFD_ASSERT (h->dynindx != -1); + + splt = bfd_get_section_by_name (dynobj, ".plt"); + srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt")); + BFD_ASSERT (splt != NULL && srel != NULL); + + /* Fill in the entry in the procedure linkage table. */ + if (htab->symbian_p) + { + unsigned i; + for (i = 0; i < htab->plt_entry_size / 4; ++i) + bfd_put_32 (output_bfd, + elf32_arm_symbian_plt_entry[i], + splt->contents + h->plt.offset + 4 * i); + + /* Fill in the entry in the .rel.plt section. */ + rel.r_offset = (splt->output_section->vma + + splt->output_offset + + h->plt.offset + 4 * (i - 1)); + rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); + + /* Get the index in the procedure linkage table which + corresponds to this symbol. This is the index of this symbol + in all the symbols for which we are making plt entries. The + first entry in the procedure linkage table is reserved. */ + plt_index = ((h->plt.offset - htab->plt_header_size) + / htab->plt_entry_size); + } + else + { + bfd_vma got_offset, got_address, plt_address; + bfd_vma got_displacement; + asection * sgot; + + sgot = bfd_get_section_by_name (dynobj, ".got.plt"); + BFD_ASSERT (sgot != NULL); + + /* Get the offset into the .got.plt table of the entry that + corresponds to this function. */ + got_offset = eh->plt_got_offset; + + /* Get the index in the procedure linkage table which + corresponds to this symbol. This is the index of this symbol + in all the symbols for which we are making plt entries. The + first three entries in .got.plt are reserved; after that + symbols appear in the same order as in .plt. */ + plt_index = (got_offset - 12) / 4; + + /* Calculate the address of the GOT entry. */ + got_address = (sgot->output_section->vma + + sgot->output_offset + + got_offset); + + /* ...and the address of the PLT entry. */ + plt_address = (splt->output_section->vma + + splt->output_offset + + h->plt.offset); + + if (htab->vxworks_p && info->shared) + { + unsigned int i; + bfd_vma val; + + for (i = 0; i != htab->plt_entry_size / 4; i++) + { + val = elf32_arm_vxworks_shared_plt_entry[i]; + if (i == 2) + val |= got_address - sgot->output_section->vma; + if (i == 5) + val |= plt_index * RELOC_SIZE (htab); + bfd_put_32 (output_bfd, val, + htab->splt->contents + h->plt.offset + i * 4); + } + } + else if (htab->vxworks_p) + { + unsigned int i; + bfd_vma val; + + for (i = 0; i != htab->plt_entry_size / 4; i++) + { + val = elf32_arm_vxworks_exec_plt_entry[i]; + if (i == 2) + val |= got_address; + if (i == 4) + val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2); + if (i == 5) + val |= plt_index * RELOC_SIZE (htab); + bfd_put_32 (output_bfd, val, + htab->splt->contents + h->plt.offset + i * 4); + } + + loc = (htab->srelplt2->contents + + (plt_index * 2 + 1) * RELOC_SIZE (htab)); + + /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation + referencing the GOT for this PLT entry. */ + rel.r_offset = plt_address + 8; + rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); + rel.r_addend = got_offset; + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); + loc += RELOC_SIZE (htab); + + /* Create the R_ARM_ABS32 relocation referencing the + beginning of the PLT for this GOT entry. */ + rel.r_offset = got_address; + rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); + rel.r_addend = 0; + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); + } + else + { + /* Calculate the displacement between the PLT slot and the + entry in the GOT. The eight-byte offset accounts for the + value produced by adding to pc in the first instruction + of the PLT stub. */ + got_displacement = got_address - (plt_address + 8); + + BFD_ASSERT ((got_displacement & 0xf0000000) == 0); + + if (!htab->use_blx && eh->plt_thumb_refcount > 0) + { + bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[0], + splt->contents + h->plt.offset - 4); + bfd_put_16 (output_bfd, elf32_arm_plt_thumb_stub[1], + splt->contents + h->plt.offset - 2); + } + + bfd_put_32 (output_bfd, + elf32_arm_plt_entry[0] + | ((got_displacement & 0x0ff00000) >> 20), + splt->contents + h->plt.offset + 0); + bfd_put_32 (output_bfd, + elf32_arm_plt_entry[1] + | ((got_displacement & 0x000ff000) >> 12), + splt->contents + h->plt.offset + 4); + bfd_put_32 (output_bfd, + elf32_arm_plt_entry[2] + | (got_displacement & 0x00000fff), + splt->contents + h->plt.offset + 8); +#ifdef FOUR_WORD_PLT + bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], + splt->contents + h->plt.offset + 12); +#endif + } + + /* Fill in the entry in the global offset table. */ + bfd_put_32 (output_bfd, + (splt->output_section->vma + + splt->output_offset), + sgot->contents + got_offset); + + /* Fill in the entry in the .rel(a).plt section. */ + rel.r_addend = 0; + rel.r_offset = got_address; + rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); + } + + loc = srel->contents + plt_index * RELOC_SIZE (htab); + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); + + if (!h->def_regular) + { + /* Mark the symbol as undefined, rather than as defined in + the .plt section. Leave the value alone. */ + sym->st_shndx = SHN_UNDEF; + /* If the symbol is weak, we do need to clear the value. + Otherwise, the PLT entry would provide a definition for + the symbol even if the symbol wasn't defined anywhere, + and so the symbol would never be NULL. */ + if (!h->ref_regular_nonweak) + sym->st_value = 0; + } + } + + if (h->got.offset != (bfd_vma) -1 + && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 + && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) + { + asection * sgot; + asection * srel; + Elf_Internal_Rela rel; + bfd_byte *loc; + bfd_vma offset; + + /* This symbol has an entry in the global offset table. Set it + up. */ + sgot = bfd_get_section_by_name (dynobj, ".got"); + srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got")); + BFD_ASSERT (sgot != NULL && srel != NULL); + + offset = (h->got.offset & ~(bfd_vma) 1); + rel.r_addend = 0; + rel.r_offset = (sgot->output_section->vma + + sgot->output_offset + + offset); + + /* 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 + && SYMBOL_REFERENCES_LOCAL (info, h)) + { + BFD_ASSERT((h->got.offset & 1) != 0); + rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); + if (!htab->use_rel) + { + rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); + } + } + else + { + BFD_ASSERT((h->got.offset & 1) == 0); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); + rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); + } + + loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab); + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); + } + + if (h->needs_copy) + { + asection * s; + Elf_Internal_Rela rel; + bfd_byte *loc; + + /* This symbol needs a copy reloc. Set it up. */ + BFD_ASSERT (h->dynindx != -1 + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)); + + s = bfd_get_section_by_name (h->root.u.def.section->owner, + RELOC_SECTION (htab, ".bss")); + BFD_ASSERT (s != NULL); + + rel.r_addend = 0; + rel.r_offset = (h->root.u.def.value + + h->root.u.def.section->output_section->vma + + h->root.u.def.section->output_offset); + rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); + loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab); + SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); + } + + /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks, + the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative + to the ".got" section. */ + if (strcmp (h->root.root.string, "_DYNAMIC") == 0 + || (!htab->vxworks_p && h == htab->root.hgot)) + sym->st_shndx = SHN_ABS; + + return TRUE; +} + +/* Finish up the dynamic sections. */ + +static bfd_boolean +elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info) +{ + bfd * dynobj; + asection * sgot; + asection * sdyn; + + dynobj = elf_hash_table (info)->dynobj; + + sgot = bfd_get_section_by_name (dynobj, ".got.plt"); + BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL); + sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); + + if (elf_hash_table (info)->dynamic_sections_created) + { + asection *splt; + Elf32_External_Dyn *dyncon, *dynconend; + struct elf32_arm_link_hash_table *htab; + + htab = elf32_arm_hash_table (info); + splt = bfd_get_section_by_name (dynobj, ".plt"); + BFD_ASSERT (splt != NULL && sdyn != NULL); + + dyncon = (Elf32_External_Dyn *) sdyn->contents; + dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); + + for (; dyncon < dynconend; dyncon++) + { + Elf_Internal_Dyn dyn; + const char * name; + asection * s; + + bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + unsigned int type; + + default: + break; + + case DT_HASH: + name = ".hash"; + goto get_vma_if_bpabi; + case DT_STRTAB: + name = ".dynstr"; + goto get_vma_if_bpabi; + case DT_SYMTAB: + name = ".dynsym"; + goto get_vma_if_bpabi; + case DT_VERSYM: + name = ".gnu.version"; + goto get_vma_if_bpabi; + case DT_VERDEF: + name = ".gnu.version_d"; + goto get_vma_if_bpabi; + case DT_VERNEED: + name = ".gnu.version_r"; + goto get_vma_if_bpabi; + + case DT_PLTGOT: + name = ".got"; + goto get_vma; + case DT_JMPREL: + name = RELOC_SECTION (htab, ".plt"); + get_vma: + s = bfd_get_section_by_name (output_bfd, name); + BFD_ASSERT (s != NULL); + if (!htab->symbian_p) + dyn.d_un.d_ptr = s->vma; + else + /* In the BPABI, tags in the PT_DYNAMIC section point + at the file offset, not the memory address, for the + convenience of the post linker. */ + dyn.d_un.d_ptr = s->filepos; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + get_vma_if_bpabi: + if (htab->symbian_p) + goto get_vma; + break; + + case DT_PLTRELSZ: + s = bfd_get_section_by_name (output_bfd, + RELOC_SECTION (htab, ".plt")); + BFD_ASSERT (s != NULL); + dyn.d_un.d_val = s->size; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_RELSZ: + case DT_RELASZ: + if (!htab->symbian_p) + { + /* My reading of the SVR4 ABI indicates that the + procedure linkage table relocs (DT_JMPREL) should be + included in the overall relocs (DT_REL). This is + what Solaris does. However, UnixWare can not handle + that case. Therefore, we override the DT_RELSZ entry + here to make it not include the JMPREL relocs. Since + the linker script arranges for .rel(a).plt to follow all + other relocation sections, we don't have to worry + about changing the DT_REL entry. */ + s = bfd_get_section_by_name (output_bfd, + RELOC_SECTION (htab, ".plt")); + if (s != NULL) + dyn.d_un.d_val -= s->size; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + } + /* Fall through */ + + case DT_REL: + case DT_RELA: + /* In the BPABI, the DT_REL tag must point at the file + offset, not the VMA, of the first relocation + section. So, we use code similar to that in + elflink.c, but do not check for SHF_ALLOC on the + relcoation section, since relocations sections are + never allocated under the BPABI. The comments above + about Unixware notwithstanding, we include all of the + relocations here. */ + if (htab->symbian_p) + { + unsigned int i; + type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) + ? SHT_REL : SHT_RELA); + dyn.d_un.d_val = 0; + for (i = 1; i < elf_numsections (output_bfd); i++) + { + Elf_Internal_Shdr *hdr + = elf_elfsections (output_bfd)[i]; + if (hdr->sh_type == type) + { + if (dyn.d_tag == DT_RELSZ + || dyn.d_tag == DT_RELASZ) + dyn.d_un.d_val += hdr->sh_size; + else if ((ufile_ptr) hdr->sh_offset + <= dyn.d_un.d_val - 1) + dyn.d_un.d_val = hdr->sh_offset; + } + } + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + } + break; + + /* Set the bottom bit of DT_INIT/FINI if the + corresponding function is Thumb. */ + case DT_INIT: + name = info->init_function; + goto get_sym; + case DT_FINI: + name = info->fini_function; + get_sym: + /* If it wasn't set by elf_bfd_final_link + then there is nothing to adjust. */ + if (dyn.d_un.d_val != 0) + { + struct elf_link_hash_entry * eh; + + eh = elf_link_hash_lookup (elf_hash_table (info), name, + FALSE, FALSE, TRUE); + if (eh != (struct elf_link_hash_entry *) NULL + && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) + { + dyn.d_un.d_val |= 1; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + } + } + break; + } + } + + /* Fill in the first entry in the procedure linkage table. */ + if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size) + { + const bfd_vma *plt0_entry; + bfd_vma got_address, plt_address, got_displacement; + + /* Calculate the addresses of the GOT and PLT. */ + got_address = sgot->output_section->vma + sgot->output_offset; + plt_address = splt->output_section->vma + splt->output_offset; + + if (htab->vxworks_p) + { + /* The VxWorks GOT is relocated by the dynamic linker. + Therefore, we must emit relocations rather than simply + computing the values now. */ + Elf_Internal_Rela rel; + + plt0_entry = elf32_arm_vxworks_exec_plt0_entry; + bfd_put_32 (output_bfd, plt0_entry[0], splt->contents + 0); + bfd_put_32 (output_bfd, plt0_entry[1], splt->contents + 4); + bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8); + bfd_put_32 (output_bfd, got_address, splt->contents + 12); + + /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */ + rel.r_offset = plt_address + 12; + rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); + rel.r_addend = 0; + SWAP_RELOC_OUT (htab) (output_bfd, &rel, + htab->srelplt2->contents); + } + else + { + got_displacement = got_address - (plt_address + 16); + + plt0_entry = elf32_arm_plt0_entry; + bfd_put_32 (output_bfd, plt0_entry[0], splt->contents + 0); + bfd_put_32 (output_bfd, plt0_entry[1], splt->contents + 4); + bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8); + bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12); + +#ifdef FOUR_WORD_PLT + /* The displacement value goes in the otherwise-unused + last word of the second entry. */ + bfd_put_32 (output_bfd, got_displacement, splt->contents + 28); +#else + bfd_put_32 (output_bfd, got_displacement, splt->contents + 16); +#endif + } + } + + /* UnixWare sets the entsize of .plt to 4, although that doesn't + really seem like the right value. */ + elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; + + if (htab->vxworks_p && !info->shared && htab->splt->size > 0) + { + /* Correct the .rel(a).plt.unloaded relocations. They will have + incorrect symbol indexes. */ + int num_plts; + unsigned char *p; + + num_plts = ((htab->splt->size - htab->plt_header_size) + / htab->plt_entry_size); + p = htab->srelplt2->contents + RELOC_SIZE (htab); + + for (; num_plts; num_plts--) + { + Elf_Internal_Rela rel; + + SWAP_RELOC_IN (htab) (output_bfd, p, &rel); + rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); + SWAP_RELOC_OUT (htab) (output_bfd, &rel, p); + p += RELOC_SIZE (htab); + + SWAP_RELOC_IN (htab) (output_bfd, p, &rel); + rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); + SWAP_RELOC_OUT (htab) (output_bfd, &rel, p); + p += RELOC_SIZE (htab); + } + } + } + + /* Fill in the first three entries in the global offset table. */ + if (sgot) + { + if (sgot->size > 0) + { + if (sdyn == NULL) + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); + else + bfd_put_32 (output_bfd, + sdyn->output_section->vma + sdyn->output_offset, + sgot->contents); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); + } + + elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; + } + + return TRUE; +} + +static void +elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED) +{ + Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ + struct elf32_arm_link_hash_table *globals; + + i_ehdrp = elf_elfheader (abfd); + + if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN) + i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION; + else + i_ehdrp->e_ident[EI_OSABI] = 0; + i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; + + if (link_info) + { + globals = elf32_arm_hash_table (link_info); + if (globals->byteswap_code) + i_ehdrp->e_flags |= EF_ARM_BE8; + } +} + +static enum elf_reloc_type_class +elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela) +{ + switch ((int) ELF32_R_TYPE (rela->r_info)) + { + case R_ARM_RELATIVE: + return reloc_class_relative; + case R_ARM_JUMP_SLOT: + return reloc_class_plt; + case R_ARM_COPY: + return reloc_class_copy; + default: + return reloc_class_normal; + } +} + +/* Set the right machine number for an Arm ELF file. */ + +static bfd_boolean +elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) +{ + if (hdr->sh_type == SHT_NOTE) + *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; + + return TRUE; +} + +static void +elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) +{ + bfd_arm_update_notes (abfd, ARM_NOTE_SECTION); +} + +/* Return TRUE if this is an unwinding table entry. */ + +static bfd_boolean +is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name) +{ + size_t len1, len2; + + len1 = sizeof (ELF_STRING_ARM_unwind) - 1; + len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1; + return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0 + || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0); +} + + +/* Set the type and flags for an ARM section. We do this by + the section name, which is a hack, but ought to work. */ + +static bfd_boolean +elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec) +{ + const char * name; + + name = bfd_get_section_name (abfd, sec); + + if (is_arm_elf_unwind_section_name (abfd, name)) + { + hdr->sh_type = SHT_ARM_EXIDX; + hdr->sh_flags |= SHF_LINK_ORDER; + } + else if (strcmp(name, ".ARM.attributes") == 0) + { + hdr->sh_type = SHT_ARM_ATTRIBUTES; + } + return TRUE; +} + +/* Parse an Arm EABI attributes section. */ +static void +elf32_arm_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr) +{ + bfd_byte *contents; + bfd_byte *p; + bfd_vma len; + + contents = bfd_malloc (hdr->sh_size); + if (!contents) + return; + if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0, + hdr->sh_size)) + { + free (contents); + return; + } + p = contents; + if (*(p++) == 'A') + { + len = hdr->sh_size - 1; + while (len > 0) + { + int namelen; + bfd_vma section_len; + + section_len = bfd_get_32 (abfd, p); + p += 4; + if (section_len > len) + section_len = len; + len -= section_len; + namelen = strlen ((char *)p) + 1; + section_len -= namelen + 4; + if (strcmp((char *)p, "aeabi") != 0) + { + /* Vendor section. Ignore it. */ + p += namelen + section_len; + } + else + { + p += namelen; + while (section_len > 0) + { + int tag; + unsigned int n; + unsigned int val; + bfd_vma subsection_len; + bfd_byte *end; + + tag = read_unsigned_leb128 (abfd, p, &n); + p += n; + subsection_len = bfd_get_32 (abfd, p); + p += 4; + if (subsection_len > section_len) + subsection_len = section_len; + section_len -= subsection_len; + subsection_len -= n + 4; + end = p + subsection_len; + switch (tag) + { + case Tag_File: + while (p < end) + { + bfd_boolean is_string; + + tag = read_unsigned_leb128 (abfd, p, &n); + p += n; + if (tag == 4 || tag == 5) + is_string = 1; + else if (tag < 32) + is_string = 0; + else + is_string = (tag & 1) != 0; + if (tag == Tag_compatibility) + { + val = read_unsigned_leb128 (abfd, p, &n); + p += n; + elf32_arm_add_eabi_attr_compat (abfd, val, + (char *)p); + p += strlen ((char *)p) + 1; + } + else if (is_string) + { + elf32_arm_add_eabi_attr_string (abfd, tag, + (char *)p); + p += strlen ((char *)p) + 1; + } + else + { + val = read_unsigned_leb128 (abfd, p, &n); + p += n; + elf32_arm_add_eabi_attr_int (abfd, tag, val); + } + } + break; + case Tag_Section: + case Tag_Symbol: + /* Don't have anywhere convenient to attach these. + Fall through for now. */ + default: + /* Ignore things we don't kow about. */ + p += subsection_len; + subsection_len = 0; + break; + } + } + } + } + } + free (contents); +} + +/* Handle an ARM specific section when reading an object file. This is + called when bfd_section_from_shdr finds a section with an unknown + type. */ + +static bfd_boolean +elf32_arm_section_from_shdr (bfd *abfd, + Elf_Internal_Shdr * hdr, + const char *name, + int shindex) +{ + /* There ought to be a place to keep ELF backend specific flags, but + at the moment there isn't one. We just keep track of the + sections by their name, instead. Fortunately, the ABI gives + names for all the ARM specific sections, so we will probably get + away with this. */ + switch (hdr->sh_type) + { + case SHT_ARM_EXIDX: + case SHT_ARM_PREEMPTMAP: + case SHT_ARM_ATTRIBUTES: + break; + + default: + return FALSE; + } + + if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) + return FALSE; + + if (hdr->sh_type == SHT_ARM_ATTRIBUTES) + elf32_arm_parse_attributes(abfd, hdr); + return TRUE; +} + +/* A structure used to record a list of sections, independently + of the next and prev fields in the asection structure. */ +typedef struct section_list +{ + asection * sec; + struct section_list * next; + struct section_list * prev; +} +section_list; + +/* Unfortunately we need to keep a list of sections for which + an _arm_elf_section_data structure has been allocated. This + is because it is possible for functions like elf32_arm_write_section + to be called on a section which has had an elf_data_structure + allocated for it (and so the used_by_bfd field is valid) but + for which the ARM extended version of this structure - the + _arm_elf_section_data structure - has not been allocated. */ +static section_list * sections_with_arm_elf_section_data = NULL; + +static void +record_section_with_arm_elf_section_data (asection * sec) +{ + struct section_list * entry; + + entry = bfd_malloc (sizeof (* entry)); + if (entry == NULL) + return; + entry->sec = sec; + entry->next = sections_with_arm_elf_section_data; + entry->prev = NULL; + if (entry->next != NULL) + entry->next->prev = entry; + sections_with_arm_elf_section_data = entry; +} + +static struct section_list * +find_arm_elf_section_entry (asection * sec) +{ + struct section_list * entry; + static struct section_list * last_entry = NULL; + + /* This is a short cut for the typical case where the sections are added + to the sections_with_arm_elf_section_data list in forward order and + then looked up here in backwards order. This makes a real difference + to the ld-srec/sec64k.exp linker test. */ + entry = sections_with_arm_elf_section_data; + if (last_entry != NULL) + { + if (last_entry->sec == sec) + entry = last_entry; + else if (last_entry->next != NULL + && last_entry->next->sec == sec) + entry = last_entry->next; + } + + for (; entry; entry = entry->next) + if (entry->sec == sec) + break; + + if (entry) + /* Record the entry prior to this one - it is the entry we are most + likely to want to locate next time. Also this way if we have been + called from unrecord_section_with_arm_elf_section_data() we will not + be caching a pointer that is about to be freed. */ + last_entry = entry->prev; + + return entry; +} + +static _arm_elf_section_data * +get_arm_elf_section_data (asection * sec) +{ + struct section_list * entry; + + entry = find_arm_elf_section_entry (sec); + + if (entry) + return elf32_arm_section_data (entry->sec); + else + return NULL; +} + +static void +unrecord_section_with_arm_elf_section_data (asection * sec) +{ + struct section_list * entry; + + entry = find_arm_elf_section_entry (sec); + + if (entry) + { + if (entry->prev != NULL) + entry->prev->next = entry->next; + if (entry->next != NULL) + entry->next->prev = entry->prev; + if (entry == sections_with_arm_elf_section_data) + sections_with_arm_elf_section_data = entry->next; + free (entry); + } +} + +/* Called for each symbol. Builds a section map based on mapping symbols. + Does not alter any of the symbols. */ + +static bfd_boolean +elf32_arm_output_symbol_hook (struct bfd_link_info *info, + const char *name, + Elf_Internal_Sym *elfsym, + asection *input_sec, + struct elf_link_hash_entry *h) +{ + int mapcount; + elf32_arm_section_map *map; + elf32_arm_section_map *newmap; + _arm_elf_section_data *arm_data; + struct elf32_arm_link_hash_table *globals; + + globals = elf32_arm_hash_table (info); + if (globals->vxworks_p + && !elf_vxworks_link_output_symbol_hook (info, name, elfsym, + input_sec, h)) + return FALSE; + + /* Only do this on final link. */ + if (info->relocatable) + return TRUE; + + /* Only build a map if we need to byteswap code. */ + if (!globals->byteswap_code) + return TRUE; + + /* We only want mapping symbols. */ + if (! bfd_is_arm_mapping_symbol_name (name)) + return TRUE; + + /* If this section has not been allocated an _arm_elf_section_data + structure then we cannot record anything. */ + arm_data = get_arm_elf_section_data (input_sec); + if (arm_data == NULL) + return TRUE; + + mapcount = arm_data->mapcount + 1; + map = arm_data->map; + + /* TODO: This may be inefficient, but we probably don't usually have many + mapping symbols per section. */ + newmap = bfd_realloc (map, mapcount * sizeof (* map)); + if (newmap != NULL) + { + arm_data->map = newmap; + arm_data->mapcount = mapcount; + + newmap[mapcount - 1].vma = elfsym->st_value; + newmap[mapcount - 1].type = name[1]; + } + + return TRUE; +} + +/* Allocate target specific section data. */ + +static bfd_boolean +elf32_arm_new_section_hook (bfd *abfd, asection *sec) +{ + _arm_elf_section_data *sdata; + bfd_size_type amt = sizeof (*sdata); + + sdata = bfd_zalloc (abfd, amt); + if (sdata == NULL) + return FALSE; + sec->used_by_bfd = sdata; + + record_section_with_arm_elf_section_data (sec); + + return _bfd_elf_new_section_hook (abfd, sec); +} + + +/* Used to order a list of mapping symbols by address. */ + +static int +elf32_arm_compare_mapping (const void * a, const void * b) +{ + return ((const elf32_arm_section_map *) a)->vma + > ((const elf32_arm_section_map *) b)->vma; +} + + +/* Do code byteswapping. Return FALSE afterwards so that the section is + written out as normal. */ + +static bfd_boolean +elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec, + bfd_byte *contents) +{ + int mapcount; + _arm_elf_section_data *arm_data; + elf32_arm_section_map *map; + bfd_vma ptr; + bfd_vma end; + bfd_vma offset; + bfd_byte tmp; + int i; + + /* If this section has not been allocated an _arm_elf_section_data + structure then we cannot record anything. */ + arm_data = get_arm_elf_section_data (sec); + if (arm_data == NULL) + return FALSE; + + mapcount = arm_data->mapcount; + map = arm_data->map; + + if (mapcount == 0) + return FALSE; + + qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping); + + offset = sec->output_section->vma + sec->output_offset; + ptr = map[0].vma - offset; + for (i = 0; i < mapcount; i++) + { + if (i == mapcount - 1) + end = sec->size; + else + end = map[i + 1].vma - offset; + + switch (map[i].type) + { + case 'a': + /* Byte swap code words. */ + while (ptr + 3 < end) + { + tmp = contents[ptr]; + contents[ptr] = contents[ptr + 3]; + contents[ptr + 3] = tmp; + tmp = contents[ptr + 1]; + contents[ptr + 1] = contents[ptr + 2]; + contents[ptr + 2] = tmp; + ptr += 4; + } + break; + + case 't': + /* Byte swap code halfwords. */ + while (ptr + 1 < end) + { + tmp = contents[ptr]; + contents[ptr] = contents[ptr + 1]; + contents[ptr + 1] = tmp; + ptr += 2; + } + break; + + case 'd': + /* Leave data alone. */ + break; + } + ptr = end; + } + + free (map); + arm_data->mapcount = 0; + arm_data->map = NULL; + unrecord_section_with_arm_elf_section_data (sec); + + return FALSE; +} + +static void +unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED, + asection * sec, + void * ignore ATTRIBUTE_UNUSED) +{ + unrecord_section_with_arm_elf_section_data (sec); +} + +static bfd_boolean +elf32_arm_close_and_cleanup (bfd * abfd) +{ + bfd_map_over_sections (abfd, unrecord_section_via_map_over_sections, NULL); + + return _bfd_elf_close_and_cleanup (abfd); +} + +/* Display STT_ARM_TFUNC symbols as functions. */ + +static void +elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, + asymbol *asym) +{ + elf_symbol_type *elfsym = (elf_symbol_type *) asym; + + if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC) + elfsym->symbol.flags |= BSF_FUNCTION; +} + + +/* Mangle thumb function symbols as we read them in. */ + +static void +elf32_arm_swap_symbol_in (bfd * abfd, + const void *psrc, + const void *pshn, + Elf_Internal_Sym *dst) +{ + bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst); + + /* New EABI objects mark thumb function symbols by setting the low bit of + the address. Turn these into STT_ARM_TFUNC. */ + if (ELF_ST_TYPE (dst->st_info) == STT_FUNC + && (dst->st_value & 1)) + { + dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC); + dst->st_value &= ~(bfd_vma) 1; + } +} + + +/* Mangle thumb function symbols as we write them out. */ + +static void +elf32_arm_swap_symbol_out (bfd *abfd, + const Elf_Internal_Sym *src, + void *cdst, + void *shndx) +{ + Elf_Internal_Sym newsym; + + /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit + of the address set, as per the new EABI. We do this unconditionally + because objcopy does not set the elf header flags until after + it writes out the symbol table. */ + if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC) + { + newsym = *src; + newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC); + newsym.st_value |= 1; + + src = &newsym; + } + bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx); +} + +/* Add the PT_ARM_EXIDX program header. */ + +static bfd_boolean +elf32_arm_modify_segment_map (bfd *abfd, + struct bfd_link_info *info ATTRIBUTE_UNUSED) +{ + struct elf_segment_map *m; + asection *sec; + + sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); + if (sec != NULL && (sec->flags & SEC_LOAD) != 0) + { + /* If there is already a PT_ARM_EXIDX header, then we do not + want to add another one. This situation arises when running + "strip"; the input binary already has the header. */ + m = elf_tdata (abfd)->segment_map; + while (m && m->p_type != PT_ARM_EXIDX) + m = m->next; + if (!m) + { + m = bfd_zalloc (abfd, sizeof (struct elf_segment_map)); + if (m == NULL) + return FALSE; + m->p_type = PT_ARM_EXIDX; + m->count = 1; + m->sections[0] = sec; + + m->next = elf_tdata (abfd)->segment_map; + elf_tdata (abfd)->segment_map = m; + } + } + + return TRUE; +} + +/* We may add a PT_ARM_EXIDX program header. */ + +static int +elf32_arm_additional_program_headers (bfd *abfd) +{ + asection *sec; + + sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); + if (sec != NULL && (sec->flags & SEC_LOAD) != 0) + return 1; + else + return 0; +} + +/* We use this to override swap_symbol_in and swap_symbol_out. */ +const struct elf_size_info elf32_arm_size_info = { + sizeof (Elf32_External_Ehdr), + sizeof (Elf32_External_Phdr), + sizeof (Elf32_External_Shdr), + sizeof (Elf32_External_Rel), + sizeof (Elf32_External_Rela), + sizeof (Elf32_External_Sym), + sizeof (Elf32_External_Dyn), + sizeof (Elf_External_Note), + 4, + 1, + 32, 2, + ELFCLASS32, EV_CURRENT, + bfd_elf32_write_out_phdrs, + bfd_elf32_write_shdrs_and_ehdr, + bfd_elf32_write_relocs, + elf32_arm_swap_symbol_in, + elf32_arm_swap_symbol_out, + bfd_elf32_slurp_reloc_table, + bfd_elf32_slurp_symbol_table, + bfd_elf32_swap_dyn_in, + bfd_elf32_swap_dyn_out, + bfd_elf32_swap_reloc_in, + bfd_elf32_swap_reloc_out, + bfd_elf32_swap_reloca_in, + bfd_elf32_swap_reloca_out +}; + +#define ELF_ARCH bfd_arch_arm +#define ELF_MACHINE_CODE EM_ARM +#ifdef __QNXTARGET__ +#define ELF_MAXPAGESIZE 0x1000 +#else +#define ELF_MAXPAGESIZE 0x8000 +#endif +#define ELF_MINPAGESIZE 0x1000 + +#define bfd_elf32_mkobject elf32_arm_mkobject + +#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data +#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data +#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags +#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data +#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create +#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup +#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line +#define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info +#define bfd_elf32_new_section_hook elf32_arm_new_section_hook +#define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol +#define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup +#define bfd_elf32_bfd_final_link elf32_arm_bfd_final_link + +#define elf_backend_get_symbol_type elf32_arm_get_symbol_type +#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook +#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook +#define elf_backend_check_relocs elf32_arm_check_relocs +#define elf_backend_relocate_section elf32_arm_relocate_section +#define elf_backend_write_section elf32_arm_write_section +#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol +#define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections +#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections +#define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook +#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections +#define elf_backend_post_process_headers elf32_arm_post_process_headers +#define elf_backend_reloc_type_class elf32_arm_reloc_type_class +#define elf_backend_object_p elf32_arm_object_p +#define elf_backend_section_flags elf32_arm_section_flags +#define elf_backend_fake_sections elf32_arm_fake_sections +#define elf_backend_section_from_shdr elf32_arm_section_from_shdr +#define elf_backend_final_write_processing elf32_arm_final_write_processing +#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol +#define elf_backend_symbol_processing elf32_arm_symbol_processing +#define elf_backend_size_info elf32_arm_size_info +#define elf_backend_modify_segment_map elf32_arm_modify_segment_map +#define elf_backend_additional_program_headers \ + elf32_arm_additional_program_headers + +#define elf_backend_can_refcount 1 +#define elf_backend_can_gc_sections 1 +#define elf_backend_plt_readonly 1 +#define elf_backend_want_got_plt 1 +#define elf_backend_want_plt_sym 0 +#define elf_backend_may_use_rel_p 1 +#define elf_backend_may_use_rela_p 0 +#define elf_backend_default_use_rela_p 0 +#define elf_backend_rela_normal 0 + +#define elf_backend_got_header_size 12 + +#include "elf32-target.h" + +/* VxWorks Targets */ + +#undef TARGET_LITTLE_SYM +#define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec +#undef TARGET_LITTLE_NAME +#define TARGET_LITTLE_NAME "elf32-littlearm-vxworks" +#undef TARGET_BIG_SYM +#define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec +#undef TARGET_BIG_NAME +#define TARGET_BIG_NAME "elf32-bigarm-vxworks" + +/* Like elf32_arm_link_hash_table_create -- but overrides + appropriately for VxWorks. */ +static struct bfd_link_hash_table * +elf32_arm_vxworks_link_hash_table_create (bfd *abfd) +{ + struct bfd_link_hash_table *ret; + + ret = elf32_arm_link_hash_table_create (abfd); + if (ret) + { + struct elf32_arm_link_hash_table *htab + = (struct elf32_arm_link_hash_table *) ret; + htab->use_rel = 0; + htab->vxworks_p = 1; + } + return ret; +} + +static void +elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) +{ + elf32_arm_final_write_processing (abfd, linker); + elf_vxworks_final_write_processing (abfd, linker); +} + +#undef elf32_bed +#define elf32_bed elf32_arm_vxworks_bed + +#undef bfd_elf32_bfd_link_hash_table_create +#define bfd_elf32_bfd_link_hash_table_create \ + elf32_arm_vxworks_link_hash_table_create +#undef elf_backend_add_symbol_hook +#define elf_backend_add_symbol_hook \ + elf_vxworks_add_symbol_hook +#undef elf_backend_final_write_processing +#define elf_backend_final_write_processing \ + elf32_arm_vxworks_final_write_processing +#undef elf_backend_emit_relocs +#define elf_backend_emit_relocs \ + elf_vxworks_emit_relocs + +#undef elf_backend_may_use_rel_p +#define elf_backend_may_use_rel_p 0 +#undef elf_backend_may_use_rela_p +#define elf_backend_may_use_rela_p 1 +#undef elf_backend_default_use_rela_p +#define elf_backend_default_use_rela_p 1 +#undef elf_backend_rela_normal +#define elf_backend_rela_normal 1 +#undef elf_backend_want_plt_sym +#define elf_backend_want_plt_sym 1 +#undef ELF_MAXPAGESIZE +#define ELF_MAXPAGESIZE 0x1000 + +#include "elf32-target.h" + + +/* Symbian OS Targets */ + +#undef TARGET_LITTLE_SYM +#define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec +#undef TARGET_LITTLE_NAME +#define TARGET_LITTLE_NAME "elf32-littlearm-symbian" +#undef TARGET_BIG_SYM +#define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec +#undef TARGET_BIG_NAME +#define TARGET_BIG_NAME "elf32-bigarm-symbian" + +/* Like elf32_arm_link_hash_table_create -- but overrides + appropriately for Symbian OS. */ +static struct bfd_link_hash_table * +elf32_arm_symbian_link_hash_table_create (bfd *abfd) +{ + struct bfd_link_hash_table *ret; + + ret = elf32_arm_link_hash_table_create (abfd); + if (ret) + { + struct elf32_arm_link_hash_table *htab + = (struct elf32_arm_link_hash_table *)ret; + /* There is no PLT header for Symbian OS. */ + htab->plt_header_size = 0; + /* The PLT entries are each three instructions. */ + htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry); + htab->symbian_p = 1; + /* Symbian uses armv5t or above, so use_blx is always true. */ + htab->use_blx = 1; + htab->root.is_relocatable_executable = 1; + } + return ret; +} + +static const struct bfd_elf_special_section +elf32_arm_symbian_special_sections[] = +{ + /* In a BPABI executable, the dynamic linking sections do not go in + the loadable read-only segment. The post-linker may wish to + refer to these sections, but they are not part of the final + program image. */ + { ".dynamic", 8, 0, SHT_DYNAMIC, 0 }, + { ".dynstr", 7, 0, SHT_STRTAB, 0 }, + { ".dynsym", 7, 0, SHT_DYNSYM, 0 }, + { ".got", 4, 0, SHT_PROGBITS, 0 }, + { ".hash", 5, 0, SHT_HASH, 0 }, + /* These sections do not need to be writable as the SymbianOS + postlinker will arrange things so that no dynamic relocation is + required. */ + { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC }, + { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC }, + { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC }, + { NULL, 0, 0, 0, 0 } +}; + +static void +elf32_arm_symbian_begin_write_processing (bfd *abfd, + struct bfd_link_info *link_info + ATTRIBUTE_UNUSED) +{ + /* BPABI objects are never loaded directly by an OS kernel; they are + processed by a postlinker first, into an OS-specific format. If + the D_PAGED bit is set on the file, BFD will align segments on + page boundaries, so that an OS can directly map the file. With + BPABI objects, that just results in wasted space. In addition, + because we clear the D_PAGED bit, map_sections_to_segments will + recognize that the program headers should not be mapped into any + loadable segment. */ + abfd->flags &= ~D_PAGED; +} + +static bfd_boolean +elf32_arm_symbian_modify_segment_map (bfd *abfd, + struct bfd_link_info *info) +{ + struct elf_segment_map *m; + asection *dynsec; + + /* BPABI shared libraries and executables should have a PT_DYNAMIC + segment. However, because the .dynamic section is not marked + with SEC_LOAD, the generic ELF code will not create such a + segment. */ + dynsec = bfd_get_section_by_name (abfd, ".dynamic"); + if (dynsec) + { + m = _bfd_elf_make_dynamic_segment (abfd, dynsec); + m->next = elf_tdata (abfd)->segment_map; + elf_tdata (abfd)->segment_map = m; + } + + /* Also call the generic arm routine. */ + return elf32_arm_modify_segment_map (abfd, info); +} + +#undef elf32_bed +#define elf32_bed elf32_arm_symbian_bed + +/* The dynamic sections are not allocated on SymbianOS; the postlinker + will process them and then discard them. */ +#undef ELF_DYNAMIC_SEC_FLAGS +#define ELF_DYNAMIC_SEC_FLAGS \ + (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED) + +#undef bfd_elf32_bfd_link_hash_table_create +#define bfd_elf32_bfd_link_hash_table_create \ + elf32_arm_symbian_link_hash_table_create +#undef elf_backend_add_symbol_hook + +#undef elf_backend_special_sections +#define elf_backend_special_sections elf32_arm_symbian_special_sections + +#undef elf_backend_begin_write_processing +#define elf_backend_begin_write_processing \ + elf32_arm_symbian_begin_write_processing +#undef elf_backend_final_write_processing +#define elf_backend_final_write_processing \ + elf32_arm_final_write_processing +#undef elf_backend_emit_relocs + +#undef elf_backend_modify_segment_map +#define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map + +/* There is no .got section for BPABI objects, and hence no header. */ +#undef elf_backend_got_header_size +#define elf_backend_got_header_size 0 + +/* Similarly, there is no .got.plt section. */ +#undef elf_backend_want_got_plt +#define elf_backend_want_got_plt 0 + +#undef elf_backend_may_use_rel_p +#define elf_backend_may_use_rel_p 1 +#undef elf_backend_may_use_rela_p +#define elf_backend_may_use_rela_p 0 +#undef elf_backend_default_use_rela_p +#define elf_backend_default_use_rela_p 0 +#undef elf_backend_rela_normal +#define elf_backend_rela_normal 0 +#undef elf_backend_want_plt_sym +#define elf_backend_want_plt_sym 0 +#undef ELF_MAXPAGESIZE +#define ELF_MAXPAGESIZE 0x8000 + +#include "elf32-target.h" |
