/* 32-bit ELF support for ARM new abi option. Copyright 1999 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "elf/arm.h" #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "elf-bfd.h" #ifndef NUM_ELEM #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0])) #endif #define USE_REL #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_info_to_howto 0 #define elf_info_to_howto_rel elf32_arm_info_to_howto #define ARM_ELF_ABI_VERSION 0 #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM static reloc_howto_type * elf32_arm_reloc_type_lookup PARAMS ((bfd * abfd, bfd_reloc_code_real_type code)); /* 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[] = { /* 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 */ 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 */ 0, /* src_mask */ 0, /* 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 */ 0x000008ff, /* src_mask */ 0x000008ff, /* 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 */ 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_SBREL32", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ HOWTO (R_ARM_THM_PC22, /* 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_PC22", /* 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_AMP_VCALL9, /* 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_AMP_VCALL9", /* name */ false, /* partial_inplace */ 0x000000ff, /* src_mask */ 0x000000ff, /* dst_mask */ true), /* 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 */ /* These next three relocs are not defined, but we need to fill the space. */ 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_unknown_17", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ 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_unknown_18", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ 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_unknown_19", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* 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_GOTOFF, /* 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_GOTOFF", /* 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) */ 26, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield,/* complain_on_overflow */ bfd_elf_generic_reloc, /* special_function */ "R_ARM_PLT32", /* name */ true, /* partial_inplace */ 0x00ffffff, /* src_mask */ 0x00ffffff, /* dst_mask */ true), /* pcrel_offset */ /* End of relocs used in ARM Linux */ 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 */ }; /* GNU extension to record C++ vtable hierarchy */ static reloc_howto_type elf32_arm_vtinherit_howto = 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 */ /* GNU extension to record C++ vtable member usage */ static reloc_howto_type elf32_arm_vtentry_howto = 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 */ /* 12 bit pc relative */ static reloc_howto_type elf32_arm_thm_pc11_howto = HOWTO (R_ARM_THM_PC11, /* 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_PC11", /* name */ false, /* partial_inplace */ 0x000007ff, /* src_mask */ 0x000007ff, /* dst_mask */ true); /* pcrel_offset */ /* 12 bit pc relative */ static reloc_howto_type elf32_arm_thm_pc9_howto = HOWTO (R_ARM_THM_PC9, /* 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_PC9", /* name */ false, /* partial_inplace */ 0x000000ff, /* src_mask */ 0x000000ff, /* dst_mask */ true); /* pcrel_offset */ static void elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc) bfd * abfd ATTRIBUTE_UNUSED; arelent * bfd_reloc; Elf32_Internal_Rel * elf_reloc; { unsigned int r_type; r_type = ELF32_R_TYPE (elf_reloc->r_info); switch (r_type) { case R_ARM_GNU_VTINHERIT: bfd_reloc->howto = & elf32_arm_vtinherit_howto; break; case R_ARM_GNU_VTENTRY: bfd_reloc->howto = & elf32_arm_vtentry_howto; break; case R_ARM_THM_PC11: bfd_reloc->howto = & elf32_arm_thm_pc11_howto; break; case R_ARM_THM_PC9: bfd_reloc->howto = & elf32_arm_thm_pc9_howto; break; default: if (r_type >= NUM_ELEM (elf32_arm_howto_table)) bfd_reloc->howto = NULL; else bfd_reloc->howto = & elf32_arm_howto_table[r_type]; break; } } struct elf32_arm_reloc_map { bfd_reloc_code_real_type bfd_reloc_val; unsigned char elf_reloc_val; }; 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_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_BRANCH23, R_ARM_THM_PC22}, {BFD_RELOC_ARM_COPY, R_ARM_COPY}, {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_GOTOFF}, {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC}, {BFD_RELOC_ARM_GOT32, R_ARM_GOT32}, {BFD_RELOC_ARM_PLT32, R_ARM_PLT32} }; static reloc_howto_type * elf32_arm_reloc_type_lookup (abfd, code) bfd *abfd ATTRIBUTE_UNUSED; bfd_reloc_code_real_type code; { unsigned int i; switch (code) { case BFD_RELOC_VTABLE_INHERIT: return & elf32_arm_vtinherit_howto; case BFD_RELOC_VTABLE_ENTRY: return & elf32_arm_vtentry_howto; case BFD_RELOC_THUMB_PCREL_BRANCH12: return & elf32_arm_thm_pc11_howto; case BFD_RELOC_THUMB_PCREL_BRANCH9: return & elf32_arm_thm_pc9_howto; default: 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_table[elf32_arm_reloc_map[i].elf_reloc_val]; return NULL; } } #include "elf32-arm.h"