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- /* AArch-64 Mach-O support for BFD.
- Copyright (C) 2015-2022 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 3 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 "sysdep.h"
- #include "bfd.h"
- #include "libbfd.h"
- #include "libiberty.h"
- #include "mach-o.h"
- #include "mach-o/arm64.h"
- #define bfd_mach_o_object_p bfd_mach_o_arm64_object_p
- #define bfd_mach_o_core_p bfd_mach_o_arm64_core_p
- #define bfd_mach_o_mkobject bfd_mach_o_arm64_mkobject
- #define bfd_mach_o_canonicalize_one_reloc \
- bfd_mach_o_arm64_canonicalize_one_reloc
- #define bfd_mach_o_swap_reloc_out NULL
- #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_arm64_bfd_reloc_type_lookup
- #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_arm64_bfd_reloc_name_lookup
- #define bfd_mach_o_print_thread NULL
- #define bfd_mach_o_tgt_seg_table NULL
- #define bfd_mach_o_section_type_valid_for_tgt NULL
- static bfd_cleanup
- bfd_mach_o_arm64_object_p (bfd *abfd)
- {
- return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM64);
- }
- static bfd_cleanup
- bfd_mach_o_arm64_core_p (bfd *abfd)
- {
- return bfd_mach_o_header_p (abfd, 0,
- BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM64);
- }
- static bool
- bfd_mach_o_arm64_mkobject (bfd *abfd)
- {
- bfd_mach_o_data_struct *mdata;
- if (!bfd_mach_o_mkobject_init (abfd))
- return false;
- mdata = bfd_mach_o_get_data (abfd);
- mdata->header.magic = BFD_MACH_O_MH_MAGIC;
- mdata->header.cputype = BFD_MACH_O_CPU_TYPE_ARM64;
- mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL;
- mdata->header.byteorder = BFD_ENDIAN_LITTLE;
- mdata->header.version = 1;
- return true;
- }
- /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
- #define MINUS_ONE (~ (bfd_vma) 0)
- static reloc_howto_type arm64_howto_table[]=
- {
- /* 0 */
- HOWTO (BFD_RELOC_64, 0, 4, 64, false, 0,
- complain_overflow_bitfield,
- NULL, "64",
- false, MINUS_ONE, MINUS_ONE, false),
- HOWTO (BFD_RELOC_32, 0, 2, 32, false, 0,
- complain_overflow_bitfield,
- NULL, "32",
- false, 0xffffffff, 0xffffffff, false),
- HOWTO (BFD_RELOC_16, 0, 1, 16, false, 0,
- complain_overflow_bitfield,
- NULL, "16",
- false, 0xffff, 0xffff, false),
- HOWTO (BFD_RELOC_8, 0, 0, 8, false, 0,
- complain_overflow_bitfield,
- NULL, "8",
- false, 0xff, 0xff, false),
- /* 4 */
- HOWTO (BFD_RELOC_64_PCREL, 0, 4, 64, true, 0,
- complain_overflow_bitfield,
- NULL, "DISP64",
- false, MINUS_ONE, MINUS_ONE, true),
- HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, true, 0,
- complain_overflow_bitfield,
- NULL, "DISP32",
- false, 0xffffffff, 0xffffffff, true),
- HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, true, 0,
- complain_overflow_bitfield,
- NULL, "DISP16",
- false, 0xffff, 0xffff, true),
- HOWTO (BFD_RELOC_AARCH64_CALL26, 0, 2, 26, true, 0,
- complain_overflow_bitfield,
- NULL, "BRANCH26",
- false, 0x03ffffff, 0x03ffffff, true),
- /* 8 */
- HOWTO (BFD_RELOC_AARCH64_ADR_HI21_PCREL, 12, 2, 21, true, 0,
- complain_overflow_signed,
- NULL, "PAGE21",
- false, 0x1fffff, 0x1fffff, true),
- HOWTO (BFD_RELOC_AARCH64_LDST16_LO12, 1, 2, 12, true, 0,
- complain_overflow_signed,
- NULL, "PGOFF12",
- false, 0xffe, 0xffe, true),
- HOWTO (BFD_RELOC_MACH_O_ARM64_ADDEND, 0, 2, 32, false, 0,
- complain_overflow_signed,
- NULL, "ADDEND",
- false, 0xffffffff, 0xffffffff, false),
- HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 2, 32, false, 0,
- complain_overflow_bitfield,
- NULL, "SUBTRACTOR32",
- false, 0xffffffff, 0xffffffff, false),
- /* 12 */
- HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 4, 64, false, 0,
- complain_overflow_bitfield,
- NULL, "SUBTRACTOR64",
- false, MINUS_ONE, MINUS_ONE, false),
- HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGE21, 12, 2, 21, true, 0,
- complain_overflow_signed,
- NULL, "GOT_LD_PG21",
- false, 0x1fffff, 0x1fffff, true),
- HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGEOFF12, 1, 2, 12, true, 0,
- complain_overflow_signed,
- NULL, "GOT_LD_PGOFF12",
- false, 0xffe, 0xffe, true),
- HOWTO (BFD_RELOC_MACH_O_ARM64_POINTER_TO_GOT, 0, 2, 32, true, 0,
- complain_overflow_bitfield,
- NULL, "PTR_TO_GOT",
- false, 0xffffffff, 0xffffffff, true),
- };
- static bool
- bfd_mach_o_arm64_canonicalize_one_reloc (bfd * abfd,
- struct mach_o_reloc_info_external * raw,
- arelent * res,
- asymbol ** syms,
- arelent * res_base ATTRIBUTE_UNUSED)
- {
- bfd_mach_o_reloc_info reloc;
- res->address = bfd_get_32 (abfd, raw->r_address);
- if (res->address & BFD_MACH_O_SR_SCATTERED)
- {
- /* Only non-scattered relocations. */
- return false;
- }
- /* The value and info fields have to be extracted dependent on target
- endian-ness. */
- bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
- if (reloc.r_type == BFD_MACH_O_ARM64_RELOC_ADDEND)
- {
- if (reloc.r_length == 2 && reloc.r_pcrel == 0)
- {
- res->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
- res->addend = reloc.r_value;
- res->howto = &arm64_howto_table[10];
- return true;
- }
- return false;
- }
- if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, &reloc, res, syms))
- return false;
- switch (reloc.r_type)
- {
- case BFD_MACH_O_ARM64_RELOC_UNSIGNED:
- switch ((reloc.r_length << 1) | reloc.r_pcrel)
- {
- case 0: /* len = 0, pcrel = 0 */
- res->howto = &arm64_howto_table[3];
- return true;
- case 2: /* len = 1, pcrel = 0 */
- res->howto = &arm64_howto_table[2];
- return true;
- case 3: /* len = 1, pcrel = 1 */
- res->howto = &arm64_howto_table[6];
- return true;
- case 4: /* len = 2, pcrel = 0 */
- res->howto = &arm64_howto_table[1];
- return true;
- case 5: /* len = 2, pcrel = 1 */
- res->howto = &arm64_howto_table[5];
- return true;
- case 6: /* len = 3, pcrel = 0 */
- res->howto = &arm64_howto_table[0];
- return true;
- case 7: /* len = 3, pcrel = 1 */
- res->howto = &arm64_howto_table[4];
- return true;
- default:
- return false;
- }
- break;
- case BFD_MACH_O_ARM64_RELOC_SUBTRACTOR:
- if (reloc.r_pcrel)
- return false;
- switch (reloc.r_length)
- {
- case 2:
- res->howto = &arm64_howto_table[11];
- return true;
- case 3:
- res->howto = &arm64_howto_table[12];
- return true;
- default:
- return false;
- }
- break;
- case BFD_MACH_O_ARM64_RELOC_BRANCH26:
- if (reloc.r_length == 2 && reloc.r_pcrel == 1)
- {
- res->howto = &arm64_howto_table[7];
- return true;
- }
- break;
- case BFD_MACH_O_ARM64_RELOC_PAGE21:
- if (reloc.r_length == 2 && reloc.r_pcrel == 1)
- {
- res->howto = &arm64_howto_table[8];
- return true;
- }
- break;
- case BFD_MACH_O_ARM64_RELOC_PAGEOFF12:
- if (reloc.r_length == 2 && reloc.r_pcrel == 0)
- {
- res->howto = &arm64_howto_table[9];
- return true;
- }
- break;
- case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGE21:
- if (reloc.r_length == 2 && reloc.r_pcrel == 1)
- {
- res->howto = &arm64_howto_table[13];
- return true;
- }
- break;
- case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGEOFF12:
- if (reloc.r_length == 2 && reloc.r_pcrel == 0)
- {
- res->howto = &arm64_howto_table[14];
- return true;
- }
- break;
- case BFD_MACH_O_ARM64_RELOC_POINTER_TO_GOT:
- if (reloc.r_length == 2 && reloc.r_pcrel == 1)
- {
- res->howto = &arm64_howto_table[15];
- return true;
- }
- break;
- default:
- break;
- }
- return false;
- }
- static reloc_howto_type *
- bfd_mach_o_arm64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
- {
- unsigned int i;
- for (i = 0;
- i < sizeof (arm64_howto_table) / sizeof (*arm64_howto_table);
- i++)
- if (code == arm64_howto_table[i].type)
- return &arm64_howto_table[i];
- return NULL;
- }
- static reloc_howto_type *
- bfd_mach_o_arm64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- const char *name ATTRIBUTE_UNUSED)
- {
- return NULL;
- }
- #define TARGET_NAME aarch64_mach_o_vec
- #define TARGET_STRING "mach-o-arm64"
- #define TARGET_ARCHITECTURE bfd_arch_aarch64
- #define TARGET_PAGESIZE 4096
- #define TARGET_BIG_ENDIAN 0
- #define TARGET_ARCHIVE 0
- #define TARGET_PRIORITY 0
- #include "mach-o-target.c"
- #undef TARGET_NAME
- #undef TARGET_STRING
- #undef TARGET_ARCHIVE
- #undef TARGET_PRIORITY
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