1 /* AArch-64 Mach-O support for BFD.
2 Copyright (C) 2015-2016 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
25 #include "libiberty.h"
26 #include "mach-o/arm64.h"
28 #define bfd_mach_o_object_p bfd_mach_o_arm64_object_p
29 #define bfd_mach_o_core_p bfd_mach_o_arm64_core_p
30 #define bfd_mach_o_mkobject bfd_mach_o_arm64_mkobject
32 #define bfd_mach_o_canonicalize_one_reloc \
33 bfd_mach_o_arm64_canonicalize_one_reloc
34 #define bfd_mach_o_swap_reloc_out NULL
36 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_arm64_bfd_reloc_type_lookup
37 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_arm64_bfd_reloc_name_lookup
39 #define bfd_mach_o_print_thread NULL
40 #define bfd_mach_o_tgt_seg_table NULL
41 #define bfd_mach_o_section_type_valid_for_tgt NULL
43 static const bfd_target *
44 bfd_mach_o_arm64_object_p (bfd *abfd)
46 return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM64);
49 static const bfd_target *
50 bfd_mach_o_arm64_core_p (bfd *abfd)
52 return bfd_mach_o_header_p (abfd, 0,
53 BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM64);
57 bfd_mach_o_arm64_mkobject (bfd *abfd)
59 bfd_mach_o_data_struct *mdata;
61 if (!bfd_mach_o_mkobject_init (abfd))
64 mdata = bfd_mach_o_get_data (abfd);
65 mdata->header.magic = BFD_MACH_O_MH_MAGIC;
66 mdata->header.cputype = BFD_MACH_O_CPU_TYPE_ARM64;
67 mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_ARM64_ALL;
68 mdata->header.byteorder = BFD_ENDIAN_LITTLE;
69 mdata->header.version = 1;
74 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
75 #define MINUS_ONE (~ (bfd_vma) 0)
77 static reloc_howto_type arm64_howto_table[]=
80 HOWTO (BFD_RELOC_64, 0, 4, 64, FALSE, 0,
81 complain_overflow_bitfield,
83 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
84 HOWTO (BFD_RELOC_32, 0, 2, 32, FALSE, 0,
85 complain_overflow_bitfield,
87 FALSE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO (BFD_RELOC_16, 0, 1, 16, FALSE, 0,
89 complain_overflow_bitfield,
91 FALSE, 0xffff, 0xffff, FALSE),
92 HOWTO (BFD_RELOC_8, 0, 0, 8, FALSE, 0,
93 complain_overflow_bitfield,
95 FALSE, 0xff, 0xff, FALSE),
97 HOWTO (BFD_RELOC_64_PCREL, 0, 4, 64, TRUE, 0,
98 complain_overflow_bitfield,
100 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
101 HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
102 complain_overflow_bitfield,
104 FALSE, 0xffffffff, 0xffffffff, TRUE),
105 HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
106 complain_overflow_bitfield,
108 FALSE, 0xffff, 0xffff, TRUE),
109 HOWTO (BFD_RELOC_AARCH64_CALL26, 0, 2, 26, TRUE, 0,
110 complain_overflow_bitfield,
112 FALSE, 0x03ffffff, 0x03ffffff, TRUE),
114 HOWTO (BFD_RELOC_AARCH64_ADR_HI21_PCREL, 12, 2, 21, TRUE, 0,
115 complain_overflow_signed,
117 FALSE, 0x1fffff, 0x1fffff, TRUE),
118 HOWTO (BFD_RELOC_AARCH64_LDST16_LO12, 1, 2, 12, TRUE, 0,
119 complain_overflow_signed,
121 FALSE, 0xffe, 0xffe, TRUE),
122 HOWTO (BFD_RELOC_MACH_O_ARM64_ADDEND, 0, 2, 32, FALSE, 0,
123 complain_overflow_signed,
125 FALSE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 2, 32, FALSE, 0,
127 complain_overflow_bitfield,
128 NULL, "SUBTRACTOR32",
129 FALSE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO (BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 4, 64, FALSE, 0,
132 complain_overflow_bitfield,
133 NULL, "SUBTRACTOR64",
134 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
135 HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGE21, 12, 2, 21, TRUE, 0,
136 complain_overflow_signed,
138 FALSE, 0x1fffff, 0x1fffff, TRUE),
139 HOWTO (BFD_RELOC_MACH_O_ARM64_GOT_LOAD_PAGEOFF12, 1, 2, 12, TRUE, 0,
140 complain_overflow_signed,
141 NULL, "GOT_LD_PGOFF12",
142 FALSE, 0xffe, 0xffe, TRUE),
143 HOWTO (BFD_RELOC_MACH_O_ARM64_POINTER_TO_GOT, 0, 2, 32, TRUE, 0,
144 complain_overflow_bitfield,
146 FALSE, 0xffffffff, 0xffffffff, TRUE),
150 bfd_mach_o_arm64_canonicalize_one_reloc (bfd *abfd,
151 struct mach_o_reloc_info_external *raw,
152 arelent *res, asymbol **syms)
154 bfd_mach_o_reloc_info reloc;
156 res->address = bfd_get_32 (abfd, raw->r_address);
157 if (res->address & BFD_MACH_O_SR_SCATTERED)
159 /* Only non-scattered relocations. */
163 /* The value and info fields have to be extracted dependent on target
165 bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
167 if (reloc.r_type == BFD_MACH_O_ARM64_RELOC_ADDEND)
169 if (reloc.r_length == 2 && reloc.r_pcrel == 0)
171 res->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
172 res->addend = reloc.r_value;
173 res->howto = &arm64_howto_table[10];
179 if (!bfd_mach_o_canonicalize_non_scattered_reloc (abfd, &reloc, res, syms))
182 switch (reloc.r_type)
184 case BFD_MACH_O_ARM64_RELOC_UNSIGNED:
185 switch ((reloc.r_length << 1) | reloc.r_pcrel)
187 case 0: /* len = 0, pcrel = 0 */
188 res->howto = &arm64_howto_table[3];
190 case 2: /* len = 1, pcrel = 0 */
191 res->howto = &arm64_howto_table[2];
193 case 3: /* len = 1, pcrel = 1 */
194 res->howto = &arm64_howto_table[6];
196 case 4: /* len = 2, pcrel = 0 */
197 res->howto = &arm64_howto_table[1];
199 case 5: /* len = 2, pcrel = 1 */
200 res->howto = &arm64_howto_table[5];
202 case 6: /* len = 3, pcrel = 0 */
203 res->howto = &arm64_howto_table[0];
205 case 7: /* len = 3, pcrel = 1 */
206 res->howto = &arm64_howto_table[4];
212 case BFD_MACH_O_ARM64_RELOC_SUBTRACTOR:
215 switch (reloc.r_length)
218 res->howto = &arm64_howto_table[11];
221 res->howto = &arm64_howto_table[12];
227 case BFD_MACH_O_ARM64_RELOC_BRANCH26:
228 if (reloc.r_length == 2 && reloc.r_pcrel == 1)
230 res->howto = &arm64_howto_table[7];
234 case BFD_MACH_O_ARM64_RELOC_PAGE21:
235 if (reloc.r_length == 2 && reloc.r_pcrel == 1)
237 res->howto = &arm64_howto_table[8];
241 case BFD_MACH_O_ARM64_RELOC_PAGEOFF12:
242 if (reloc.r_length == 2 && reloc.r_pcrel == 0)
244 res->howto = &arm64_howto_table[9];
248 case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGE21:
249 if (reloc.r_length == 2 && reloc.r_pcrel == 1)
251 res->howto = &arm64_howto_table[13];
255 case BFD_MACH_O_ARM64_RELOC_GOT_LOAD_PAGEOFF12:
256 if (reloc.r_length == 2 && reloc.r_pcrel == 0)
258 res->howto = &arm64_howto_table[14];
262 case BFD_MACH_O_ARM64_RELOC_POINTER_TO_GOT:
263 if (reloc.r_length == 2 && reloc.r_pcrel == 1)
265 res->howto = &arm64_howto_table[15];
275 static reloc_howto_type *
276 bfd_mach_o_arm64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
277 bfd_reloc_code_real_type code)
282 i < sizeof (arm64_howto_table) / sizeof (*arm64_howto_table);
284 if (code == arm64_howto_table[i].type)
285 return &arm64_howto_table[i];
289 static reloc_howto_type *
290 bfd_mach_o_arm64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
291 const char *name ATTRIBUTE_UNUSED)
296 #define TARGET_NAME aarch64_mach_o_vec
297 #define TARGET_STRING "mach-o-arm64"
298 #define TARGET_ARCHITECTURE bfd_arch_aarch64
299 #define TARGET_PAGESIZE 4096
300 #define TARGET_BIG_ENDIAN 0
301 #define TARGET_ARCHIVE 0
302 #define TARGET_PRIORITY 0
303 #include "mach-o-target.c"
307 #undef TARGET_ARCHIVE
308 #undef TARGET_PRIORITY