| /* AArch-64 Mach-O support for BFD. |
| Copyright (C) 2015-2024 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, 8, 64, false, 0, |
| complain_overflow_bitfield, |
| NULL, "64", |
| false, MINUS_ONE, MINUS_ONE, false), |
| HOWTO (BFD_RELOC_32, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO (BFD_RELOC_16, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "16", |
| false, 0xffff, 0xffff, false), |
| HOWTO (BFD_RELOC_8, 0, 1, 8, false, 0, |
| complain_overflow_bitfield, |
| NULL, "8", |
| false, 0xff, 0xff, false), |
| /* 4 */ |
| HOWTO (BFD_RELOC_64_PCREL, 0, 8, 64, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP64", |
| false, MINUS_ONE, MINUS_ONE, true), |
| HOWTO (BFD_RELOC_32_PCREL, 0, 4, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP32", |
| false, 0xffffffff, 0xffffffff, true), |
| HOWTO (BFD_RELOC_16_PCREL, 0, 2, 16, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP16", |
| false, 0xffff, 0xffff, true), |
| HOWTO (BFD_RELOC_AARCH64_CALL26, 0, 4, 26, true, 0, |
| complain_overflow_bitfield, |
| NULL, "BRANCH26", |
| false, 0x03ffffff, 0x03ffffff, true), |
| /* 8 */ |
| HOWTO (BFD_RELOC_AARCH64_ADR_HI21_PCREL, 12, 4, 21, true, 0, |
| complain_overflow_signed, |
| NULL, "PAGE21", |
| false, 0x1fffff, 0x1fffff, true), |
| HOWTO (BFD_RELOC_AARCH64_LDST16_LO12, 1, 4, 12, true, 0, |
| complain_overflow_signed, |
| NULL, "PGOFF12", |
| false, 0xffe, 0xffe, true), |
| HOWTO (BFD_RELOC_MACH_O_ARM64_ADDEND, 0, 4, 32, false, 0, |
| complain_overflow_signed, |
| NULL, "ADDEND", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SUBTRACTOR32", |
| false, 0xffffffff, 0xffffffff, false), |
| /* 12 */ |
| HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 8, 64, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SUBTRACTOR64", |
| false, MINUS_ONE, MINUS_ONE, false), |
| HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGE21, 12, 4, 21, true, 0, |
| complain_overflow_signed, |
| NULL, "GOT_LD_PG21", |
| false, 0x1fffff, 0x1fffff, true), |
| HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGEOFF12, 1, 4, 12, true, 0, |
| complain_overflow_signed, |
| NULL, "GOT_LD_PGOFF12", |
| false, 0xffe, 0xffe, true), |
| HOWTO (BFD_RELOC_MACH_O_ARM64_POINTER_TO_GOT, 0, 4, 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 |