| /* ARM 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/arm.h" |
| |
| #define bfd_mach_o_object_p bfd_mach_o_arm_object_p |
| #define bfd_mach_o_core_p bfd_mach_o_arm_core_p |
| #define bfd_mach_o_mkobject bfd_mach_o_arm_mkobject |
| |
| #define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_arm_canonicalize_one_reloc |
| #define bfd_mach_o_swap_reloc_out NULL |
| #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_arm_bfd_reloc_type_lookup |
| #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_arm_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_arm_object_p (bfd *abfd) |
| { |
| return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM); |
| } |
| |
| static bfd_cleanup |
| bfd_mach_o_arm_core_p (bfd *abfd) |
| { |
| return bfd_mach_o_header_p (abfd, 0, |
| BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM); |
| } |
| |
| static bool |
| bfd_mach_o_arm_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_ARM; |
| mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_ARM_ALL; |
| mdata->header.byteorder = BFD_ENDIAN_LITTLE; |
| mdata->header.version = 1; |
| |
| return true; |
| } |
| |
| static reloc_howto_type arm_howto_table[]= |
| { |
| /* 0 */ |
| 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), |
| HOWTO (BFD_RELOC_32_PCREL, 0, 4, 32, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP32", |
| false, 0xffffffff, 0xffffffff, true), |
| /* 4 */ |
| HOWTO (BFD_RELOC_16_PCREL, 0, 2, 16, true, 0, |
| complain_overflow_bitfield, |
| NULL, "DISP16", |
| false, 0xffff, 0xffff, true), |
| HOWTO (BFD_RELOC_MACH_O_SECTDIFF, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SECTDIFF_32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO (BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "LSECTDIFF_32", |
| false, 0xffffffff, 0xffffffff, false), |
| HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, |
| NULL, "PAIR_32", |
| false, 0xffffffff, 0xffffffff, false), |
| /* 8 */ |
| HOWTO (BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "SECTDIFF_16", |
| false, 0xffff, 0xffff, false), |
| HOWTO (BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "LSECTDIFF_16", |
| false, 0xffff, 0xffff, false), |
| HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "PAIR_16", |
| false, 0xffff, 0xffff, false), |
| HOWTO (BFD_RELOC_ARM_PCREL_CALL, 2, 4, 24, true, 0, |
| complain_overflow_signed, |
| NULL, "BR24", |
| false, 0x00ffffff, 0x00ffffff, true), |
| /* 12 */ |
| HOWTO (BFD_RELOC_ARM_MOVW, 0, 4, 16, false, 0, |
| complain_overflow_dont, |
| NULL, "MOVW", |
| false, 0x000f0fff, 0x000f0fff, false), |
| HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 4, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "PAIR_W", |
| false, 0x000f0fff, 0x000f0fff, false), |
| HOWTO (BFD_RELOC_ARM_MOVT, 0, 4, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "MOVT", |
| false, 0x000f0fff, 0x000f0fff, false), |
| HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 4, 16, false, 0, |
| complain_overflow_bitfield, |
| NULL, "PAIR_T", |
| false, 0x000f0fff, 0x000f0fff, false), |
| /* 16 */ |
| HOWTO (BFD_RELOC_THUMB_PCREL_BLX, 2, 4, 24, true, 0, |
| complain_overflow_signed, |
| NULL, "TBR22", |
| false, 0x07ff2fff, 0x07ff2fff, true) |
| }; |
| |
| static bool |
| bfd_mach_o_arm_canonicalize_one_reloc (bfd * abfd, |
| struct mach_o_reloc_info_external * raw, |
| arelent * res, |
| asymbol ** syms, |
| arelent * res_base) |
| { |
| bfd_mach_o_reloc_info reloc; |
| |
| if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms)) |
| return false; |
| |
| if (reloc.r_scattered) |
| { |
| switch (reloc.r_type) |
| { |
| case BFD_MACH_O_ARM_RELOC_PAIR: |
| /* PR 21813: Check for a corrupt PAIR reloc at the start. */ |
| if (res == res_base) |
| { |
| _bfd_error_handler (_("malformed mach-o ARM reloc pair: " |
| "reloc is first reloc")); |
| return false; |
| } |
| if (reloc.r_length == 2) |
| { |
| res->howto = &arm_howto_table[7]; |
| res->address = res[-1].address; |
| return true; |
| } |
| else if (reloc.r_length == 1) |
| { |
| res->howto = &arm_howto_table[10]; |
| res->address = res[-1].address; |
| return true; |
| } |
| _bfd_error_handler (_("malformed mach-o ARM reloc pair: " |
| "invalid length: %d"), reloc.r_length); |
| return false; |
| |
| case BFD_MACH_O_ARM_RELOC_SECTDIFF: |
| if (reloc.r_length == 2) |
| { |
| res->howto = &arm_howto_table[5]; |
| return true; |
| } |
| else if (reloc.r_length == 1) |
| { |
| res->howto = &arm_howto_table[8]; |
| return true; |
| } |
| _bfd_error_handler (_("malformed mach-o ARM sectdiff reloc: " |
| "invalid length: %d"), reloc.r_length); |
| return false; |
| |
| case BFD_MACH_O_ARM_RELOC_LOCAL_SECTDIFF: |
| if (reloc.r_length == 2) |
| { |
| res->howto = &arm_howto_table[6]; |
| return true; |
| } |
| else if (reloc.r_length == 1) |
| { |
| res->howto = &arm_howto_table[9]; |
| return true; |
| } |
| _bfd_error_handler (_("malformed mach-o ARM local sectdiff reloc: " |
| "invalid length: %d"), |
| reloc.r_length); |
| return false; |
| |
| case BFD_MACH_O_ARM_RELOC_HALF_SECTDIFF: |
| switch (reloc.r_length) |
| { |
| case 2: /* :lower16: for movw arm. */ |
| res->howto = &arm_howto_table[12]; |
| return true; |
| case 3: /* :upper16: for movt arm. */ |
| res->howto = &arm_howto_table[14]; |
| return true; |
| } |
| _bfd_error_handler (_("malformed mach-o ARM half sectdiff reloc: " |
| "invalid length: %d"), |
| reloc.r_length); |
| return false; |
| |
| default: |
| break; |
| } |
| } |
| else |
| { |
| switch (reloc.r_type) |
| { |
| case BFD_MACH_O_ARM_RELOC_VANILLA: |
| switch ((reloc.r_length << 1) | reloc.r_pcrel) |
| { |
| case 0: /* len = 0, pcrel = 0 */ |
| res->howto = &arm_howto_table[2]; |
| return true; |
| case 2: /* len = 1, pcrel = 0 */ |
| res->howto = &arm_howto_table[1]; |
| return true; |
| case 3: /* len = 1, pcrel = 1 */ |
| res->howto = &arm_howto_table[4]; |
| return true; |
| case 4: /* len = 2, pcrel = 0 */ |
| res->howto = &arm_howto_table[0]; |
| return true; |
| case 5: /* len = 2, pcrel = 1 */ |
| res->howto = &arm_howto_table[3]; |
| return true; |
| default: |
| _bfd_error_handler (_("malformed mach-o ARM vanilla reloc: " |
| "invalid length: %d (pcrel: %d)"), |
| reloc.r_length, reloc.r_pcrel); |
| return false; |
| } |
| break; |
| |
| case BFD_MACH_O_ARM_RELOC_BR24: |
| if (reloc.r_length == 2 && reloc.r_pcrel == 1) |
| { |
| res->howto = &arm_howto_table[11]; |
| return true; |
| } |
| break; |
| |
| case BFD_MACH_O_THUMB_RELOC_BR22: |
| if (reloc.r_length == 2 && reloc.r_pcrel == 1) |
| { |
| res->howto = &arm_howto_table[16]; |
| return true; |
| } |
| break; |
| |
| case BFD_MACH_O_ARM_RELOC_HALF: |
| if (reloc.r_pcrel == 0) |
| switch (reloc.r_length) |
| { |
| case 0: /* :lower16: for movw arm. */ |
| res->howto = &arm_howto_table[12]; |
| return true; |
| case 1: /* :upper16: for movt arm. */ |
| res->howto = &arm_howto_table[14]; |
| return true; |
| } |
| break; |
| |
| case BFD_MACH_O_ARM_RELOC_PAIR: |
| if (res == res_base) |
| { |
| _bfd_error_handler (_("malformed mach-o ARM reloc pair: " |
| "reloc is first reloc")); |
| return false; |
| } |
| if (res[-1].howto == &arm_howto_table[12] |
| && reloc.r_length == 0) |
| { |
| /* Pair for :lower16: of movw arm. */ |
| res->howto = &arm_howto_table[13]; |
| /* This reloc contains the other half in its r_address field. */ |
| res[-1].addend += (res->address & 0xffff) << 16; |
| res->address = res[-1].address; |
| return true; |
| } |
| else if (res[-1].howto == &arm_howto_table[14] |
| && reloc.r_length == 1) |
| { |
| /* Pair for :upper16: of movt arm. */ |
| res->howto = &arm_howto_table[15]; |
| /* This reloc contains the other half in its r_address field. */ |
| res[-1].addend += res->address & 0xffff; |
| res->address = res[-1].address; |
| return true; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| _bfd_error_handler (_("malformed mach-o ARM reloc: " |
| "unknown reloc type: %d"), reloc.r_length); |
| return false; |
| } |
| |
| static reloc_howto_type * |
| bfd_mach_o_arm_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sizeof (arm_howto_table) / sizeof (*arm_howto_table); i++) |
| if (code == arm_howto_table[i].type) |
| return &arm_howto_table[i]; |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| bfd_mach_o_arm_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *name ATTRIBUTE_UNUSED) |
| { |
| return NULL; |
| } |
| |
| #define TARGET_NAME arm_mach_o_vec |
| #define TARGET_STRING "mach-o-arm" |
| #define TARGET_ARCHITECTURE bfd_arch_arm |
| #define TARGET_PAGESIZE 4096 |
| #define TARGET_BIG_ENDIAN 0 |
| #define TARGET_ARCHIVE 0 |
| #define TARGET_PRIORITY 0 |
| #include "mach-o-target.c" |