mach-o-x86-64.c revision 1.6
1 /* Intel x86-64 Mach-O support for BFD. 2 Copyright (C) 2010-2018 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 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. 10 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. 15 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. */ 20 21 #include "sysdep.h" 22 #include "mach-o.h" 23 #include "bfd.h" 24 #include "libbfd.h" 25 #include "libiberty.h" 26 #include "mach-o/x86-64.h" 27 28 #define bfd_mach_o_object_p bfd_mach_o_x86_64_object_p 29 #define bfd_mach_o_core_p bfd_mach_o_x86_64_core_p 30 #define bfd_mach_o_mkobject bfd_mach_o_x86_64_mkobject 31 32 static const bfd_target * 33 bfd_mach_o_x86_64_object_p (bfd *abfd) 34 { 35 return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_X86_64); 36 } 37 38 static const bfd_target * 39 bfd_mach_o_x86_64_core_p (bfd *abfd) 40 { 41 return bfd_mach_o_header_p (abfd, 0, 42 BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64); 43 } 44 45 static bfd_boolean 46 bfd_mach_o_x86_64_mkobject (bfd *abfd) 47 { 48 bfd_mach_o_data_struct *mdata; 49 50 if (!bfd_mach_o_mkobject_init (abfd)) 51 return FALSE; 52 53 mdata = bfd_mach_o_get_data (abfd); 54 mdata->header.magic = BFD_MACH_O_MH_MAGIC_64; 55 mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64; 56 mdata->header.cpusubtype = 57 BFD_MACH_O_CPU_SUBTYPE_X86_ALL | BFD_MACH_O_CPU_SUBTYPE_LIB64; 58 mdata->header.byteorder = BFD_ENDIAN_LITTLE; 59 mdata->header.version = 2; 60 61 return TRUE; 62 } 63 64 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ 65 #define MINUS_ONE (~ (bfd_vma) 0) 66 67 static reloc_howto_type x86_64_howto_table[]= 68 { 69 /* 0 */ 70 HOWTO(BFD_RELOC_64, 0, 4, 64, FALSE, 0, 71 complain_overflow_bitfield, 72 NULL, "64", 73 FALSE, MINUS_ONE, MINUS_ONE, FALSE), 74 HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0, 75 complain_overflow_bitfield, 76 NULL, "32", 77 FALSE, 0xffffffff, 0xffffffff, FALSE), 78 HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0, 79 complain_overflow_bitfield, 80 NULL, "DISP32", 81 FALSE, 0xffffffff, 0xffffffff, TRUE), 82 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_1, 0, 2, 32, TRUE, 0, 83 complain_overflow_bitfield, 84 NULL, "DISP32_1", 85 FALSE, 0xffffffff, 0xffffffff, TRUE), 86 /* 4 */ 87 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, TRUE, 0, 88 complain_overflow_bitfield, 89 NULL, "DISP32_2", 90 FALSE, 0xffffffff, 0xffffffff, TRUE), 91 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, TRUE, 0, 92 complain_overflow_bitfield, 93 NULL, "DISP32_4", 94 FALSE, 0xffffffff, 0xffffffff, TRUE), 95 HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, TRUE, 0, 96 complain_overflow_bitfield, 97 NULL, "BRANCH32", 98 FALSE, 0xffffffff, 0xffffffff, TRUE), 99 HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, TRUE, 0, 100 complain_overflow_bitfield, 101 NULL, "GOT_LOAD", 102 FALSE, 0xffffffff, 0xffffffff, TRUE), 103 /* 8 */ 104 HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR32, 0, 2, 32, FALSE, 0, 105 complain_overflow_bitfield, 106 NULL, "SUBTRACTOR32", 107 FALSE, 0xffffffff, 0xffffffff, FALSE), 108 HOWTO(BFD_RELOC_MACH_O_SUBTRACTOR64, 0, 4, 64, FALSE, 0, 109 complain_overflow_bitfield, 110 NULL, "SUBTRACTOR64", 111 FALSE, MINUS_ONE, MINUS_ONE, FALSE), 112 HOWTO(BFD_RELOC_MACH_O_X86_64_GOT, 0, 2, 32, TRUE, 0, 113 complain_overflow_bitfield, 114 NULL, "GOT", 115 FALSE, 0xffffffff, 0xffffffff, TRUE), 116 HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, TRUE, 0, 117 complain_overflow_bitfield, 118 NULL, "BRANCH8", 119 FALSE, 0xff, 0xff, TRUE), 120 /* 12 */ 121 HOWTO(BFD_RELOC_MACH_O_X86_64_TLV, 0, 2, 32, TRUE, 0, 122 complain_overflow_bitfield, 123 NULL, "TLV", 124 FALSE, 0xffffffff, 0xffffffff, TRUE), 125 }; 126 127 static bfd_boolean 128 bfd_mach_o_x86_64_canonicalize_one_reloc (bfd * abfd, 129 struct mach_o_reloc_info_external * raw, 130 arelent * res, 131 asymbol ** syms, 132 arelent * res_base ATTRIBUTE_UNUSED) 133 { 134 bfd_mach_o_reloc_info reloc; 135 136 if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms)) 137 return FALSE; 138 139 /* On x86-64, scattered relocs are not used. */ 140 if (reloc.r_scattered) 141 return FALSE; 142 143 switch (reloc.r_type) 144 { 145 case BFD_MACH_O_X86_64_RELOC_UNSIGNED: 146 if (reloc.r_pcrel) 147 return FALSE; 148 switch (reloc.r_length) 149 { 150 case 2: 151 res->howto = &x86_64_howto_table[1]; 152 return TRUE; 153 case 3: 154 res->howto = &x86_64_howto_table[0]; 155 return TRUE; 156 default: 157 return FALSE; 158 } 159 case BFD_MACH_O_X86_64_RELOC_SIGNED: 160 if (reloc.r_length == 2 && reloc.r_pcrel) 161 { 162 res->howto = &x86_64_howto_table[2]; 163 return TRUE; 164 } 165 break; 166 case BFD_MACH_O_X86_64_RELOC_BRANCH: 167 if (!reloc.r_pcrel) 168 return FALSE; 169 switch (reloc.r_length) 170 { 171 case 2: 172 res->howto = &x86_64_howto_table[6]; 173 return TRUE; 174 default: 175 return FALSE; 176 } 177 break; 178 case BFD_MACH_O_X86_64_RELOC_GOT_LOAD: 179 if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) 180 { 181 res->howto = &x86_64_howto_table[7]; 182 return TRUE; 183 } 184 break; 185 case BFD_MACH_O_X86_64_RELOC_GOT: 186 if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) 187 { 188 res->howto = &x86_64_howto_table[10]; 189 return TRUE; 190 } 191 break; 192 case BFD_MACH_O_X86_64_RELOC_SUBTRACTOR: 193 if (reloc.r_pcrel) 194 return FALSE; 195 switch (reloc.r_length) 196 { 197 case 2: 198 res->howto = &x86_64_howto_table[8]; 199 return TRUE; 200 case 3: 201 res->howto = &x86_64_howto_table[9]; 202 return TRUE; 203 default: 204 return FALSE; 205 } 206 break; 207 case BFD_MACH_O_X86_64_RELOC_SIGNED_1: 208 if (reloc.r_length == 2 && reloc.r_pcrel) 209 { 210 res->howto = &x86_64_howto_table[3]; 211 return TRUE; 212 } 213 break; 214 case BFD_MACH_O_X86_64_RELOC_SIGNED_2: 215 if (reloc.r_length == 2 && reloc.r_pcrel) 216 { 217 res->howto = &x86_64_howto_table[4]; 218 return TRUE; 219 } 220 break; 221 case BFD_MACH_O_X86_64_RELOC_SIGNED_4: 222 if (reloc.r_length == 2 && reloc.r_pcrel) 223 { 224 res->howto = &x86_64_howto_table[5]; 225 return TRUE; 226 } 227 break; 228 case BFD_MACH_O_X86_64_RELOC_TLV: 229 if (reloc.r_length == 2 && reloc.r_pcrel && reloc.r_extern) 230 { 231 res->howto = &x86_64_howto_table[12]; 232 return TRUE; 233 } 234 break; 235 default: 236 return FALSE; 237 } 238 return FALSE; 239 } 240 241 static bfd_boolean 242 bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo) 243 { 244 rinfo->r_address = rel->address; 245 rinfo->r_scattered = 0; 246 switch (rel->howto->type) 247 { 248 case BFD_RELOC_32: 249 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED; 250 rinfo->r_pcrel = 0; 251 rinfo->r_length = 2; 252 break; 253 case BFD_RELOC_64: 254 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED; 255 rinfo->r_pcrel = 0; 256 rinfo->r_length = 3; 257 break; 258 case BFD_RELOC_32_PCREL: 259 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED; 260 rinfo->r_pcrel = 1; 261 rinfo->r_length = 2; 262 break; 263 case BFD_RELOC_MACH_O_X86_64_PCREL32_1: 264 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_1; 265 rinfo->r_pcrel = 1; 266 rinfo->r_length = 2; 267 break; 268 case BFD_RELOC_MACH_O_X86_64_PCREL32_2: 269 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_2; 270 rinfo->r_pcrel = 1; 271 rinfo->r_length = 2; 272 break; 273 case BFD_RELOC_MACH_O_X86_64_PCREL32_4: 274 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_4; 275 rinfo->r_pcrel = 1; 276 rinfo->r_length = 2; 277 break; 278 case BFD_RELOC_MACH_O_X86_64_BRANCH32: 279 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_BRANCH; 280 rinfo->r_pcrel = 1; 281 rinfo->r_length = 2; 282 break; 283 case BFD_RELOC_MACH_O_SUBTRACTOR32: 284 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR; 285 rinfo->r_pcrel = 0; 286 rinfo->r_length = 2; 287 break; 288 case BFD_RELOC_MACH_O_SUBTRACTOR64: 289 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR; 290 rinfo->r_pcrel = 0; 291 rinfo->r_length = 3; 292 break; 293 case BFD_RELOC_MACH_O_X86_64_GOT: 294 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT; 295 rinfo->r_pcrel = 1; 296 rinfo->r_length = 2; 297 break; 298 case BFD_RELOC_MACH_O_X86_64_GOT_LOAD: 299 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT_LOAD; 300 rinfo->r_pcrel = 1; 301 rinfo->r_length = 2; 302 break; 303 case BFD_RELOC_MACH_O_X86_64_TLV: 304 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_TLV; 305 rinfo->r_pcrel = 1; 306 rinfo->r_length = 2; 307 break; 308 default: 309 return FALSE; 310 } 311 if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) 312 { 313 rinfo->r_extern = 0; 314 rinfo->r_value = 315 (*rel->sym_ptr_ptr)->section->output_section->target_index; 316 } 317 else 318 { 319 rinfo->r_extern = 1; 320 rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i; 321 } 322 return TRUE; 323 } 324 325 static reloc_howto_type * 326 bfd_mach_o_x86_64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 327 bfd_reloc_code_real_type code) 328 { 329 unsigned int i; 330 331 for (i = 0; 332 i < sizeof (x86_64_howto_table) / sizeof (*x86_64_howto_table); 333 i++) 334 if (code == x86_64_howto_table[i].type) 335 return &x86_64_howto_table[i]; 336 return NULL; 337 } 338 339 static reloc_howto_type * 340 bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 341 const char *name ATTRIBUTE_UNUSED) 342 { 343 return NULL; 344 } 345 346 static bfd_boolean 347 bfd_mach_o_section_type_valid_for_x86_64 (unsigned long val) 348 { 349 if (val == BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS 350 || val == BFD_MACH_O_S_LAZY_SYMBOL_POINTERS 351 || val == BFD_MACH_O_S_SYMBOL_STUBS) 352 return FALSE; 353 return TRUE; 354 } 355 356 /* We want to bump the alignment of some sections. */ 357 static const mach_o_section_name_xlat text_section_names_xlat[] = 358 { 359 { ".eh_frame", "__eh_frame", 360 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED, 361 BFD_MACH_O_S_ATTR_LIVE_SUPPORT 362 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS 363 | BFD_MACH_O_S_ATTR_NO_TOC, 3}, 364 { NULL, NULL, 0, 0, 0, 0} 365 }; 366 367 const mach_o_segment_name_xlat mach_o_x86_64_segsec_names_xlat[] = 368 { 369 { "__TEXT", text_section_names_xlat }, 370 { NULL, NULL } 371 }; 372 373 #define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_x86_64_canonicalize_one_reloc 374 #define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out 375 376 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_x86_64_bfd_reloc_type_lookup 377 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup 378 #define bfd_mach_o_print_thread NULL 379 #define bfd_mach_o_tgt_seg_table mach_o_x86_64_segsec_names_xlat 380 #define bfd_mach_o_section_type_valid_for_tgt bfd_mach_o_section_type_valid_for_x86_64 381 382 #define TARGET_NAME x86_64_mach_o_vec 383 #define TARGET_STRING "mach-o-x86-64" 384 #define TARGET_ARCHITECTURE bfd_arch_i386 385 #define TARGET_PAGESIZE 4096 386 #define TARGET_BIG_ENDIAN 0 387 #define TARGET_ARCHIVE 0 388 #define TARGET_PRIORITY 0 389 #include "mach-o-target.c" 390
Indexes created Wed Apr 22 00:22:44 UTC 2026