| 1 | /* 32-bit ELF support for ARM old abi option. |
| 2 | Copyright 1999, 2000, 2001, 2002 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #define OLD_ARM_ABI |
| 21 | #define bfd_elf32_arm_allocate_interworking_sections \ |
| 22 | bfd_elf32_arm_oabi_allocate_interworking_sections |
| 23 | #define bfd_elf32_arm_get_bfd_for_interworking \ |
| 24 | bfd_elf32_arm_oabi_get_bfd_for_interworking |
| 25 | #define bfd_elf32_arm_process_before_allocation \ |
| 26 | bfd_elf32_arm_oabi_process_before_allocation |
| 27 | #define bfd_elf32_arm_add_glue_sections_to_bfd \ |
| 28 | bfd_elf32_arm_oabi_add_glue_sections_to_bfd |
| 29 | |
| 30 | #include "elf/arm.h" |
| 31 | #include "bfd.h" |
| 32 | #include "sysdep.h" |
| 33 | #include "libbfd.h" |
| 34 | #include "elf-bfd.h" |
| 35 | |
| 36 | #ifndef NUM_ELEM |
| 37 | #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0]) |
| 38 | #endif |
| 39 | |
| 40 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_oabi_vec |
| 41 | #define TARGET_LITTLE_NAME "elf32-littlearm-oabi" |
| 42 | #define TARGET_BIG_SYM bfd_elf32_bigarm_oabi_vec |
| 43 | #define TARGET_BIG_NAME "elf32-bigarm-oabi" |
| 44 | |
| 45 | #define elf_info_to_howto elf32_arm_info_to_howto |
| 46 | #define elf_info_to_howto_rel 0 |
| 47 | |
| 48 | #define ARM_ELF_ABI_VERSION 0 |
| 49 | #define ARM_ELF_OS_ABI_VERSION 0 |
| 50 | |
| 51 | static reloc_howto_type * find_howto PARAMS ((unsigned int)); |
| 52 | static void elf32_arm_info_to_howto PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 53 | static reloc_howto_type * elf32_arm_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 54 | |
| 55 | static reloc_howto_type elf32_arm_howto_table[] = |
| 56 | { |
| 57 | /* No relocation. */ |
| 58 | HOWTO (R_ARM_NONE, /* type */ |
| 59 | 0, /* rightshift */ |
| 60 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 61 | 0, /* bitsize */ |
| 62 | FALSE, /* pc_relative */ |
| 63 | 0, /* bitpos */ |
| 64 | complain_overflow_dont, /* complain_on_overflow */ |
| 65 | bfd_elf_generic_reloc, /* special_function */ |
| 66 | "R_ARM_NONE", /* name */ |
| 67 | FALSE, /* partial_inplace */ |
| 68 | 0, /* src_mask */ |
| 69 | 0, /* dst_mask */ |
| 70 | FALSE), /* pcrel_offset */ |
| 71 | |
| 72 | HOWTO (R_ARM_PC24, /* type */ |
| 73 | 2, /* rightshift */ |
| 74 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 75 | 24, /* bitsize */ |
| 76 | TRUE, /* pc_relative */ |
| 77 | 0, /* bitpos */ |
| 78 | complain_overflow_signed, /* complain_on_overflow */ |
| 79 | bfd_elf_generic_reloc, /* special_function */ |
| 80 | "R_ARM_PC24", /* name */ |
| 81 | FALSE, /* partial_inplace */ |
| 82 | 0x00ffffff, /* src_mask */ |
| 83 | 0x00ffffff, /* dst_mask */ |
| 84 | TRUE), /* pcrel_offset */ |
| 85 | |
| 86 | /* 32 bit absolute. */ |
| 87 | HOWTO (R_ARM_ABS32, /* type */ |
| 88 | 0, /* rightshift */ |
| 89 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 90 | 32, /* bitsize */ |
| 91 | FALSE, /* pc_relative */ |
| 92 | 0, /* bitpos */ |
| 93 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 94 | bfd_elf_generic_reloc, /* special_function */ |
| 95 | "R_ARM_ABS32", /* name */ |
| 96 | FALSE, /* partial_inplace */ |
| 97 | 0xffffffff, /* src_mask */ |
| 98 | 0xffffffff, /* dst_mask */ |
| 99 | FALSE), /* pcrel_offset */ |
| 100 | |
| 101 | /* Standard 32bit pc-relative reloc. */ |
| 102 | HOWTO (R_ARM_REL32, /* type */ |
| 103 | 0, /* rightshift */ |
| 104 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 105 | 32, /* bitsize */ |
| 106 | TRUE, /* pc_relative */ |
| 107 | 0, /* bitpos */ |
| 108 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 109 | bfd_elf_generic_reloc, /* special_function */ |
| 110 | "R_ARM_REL32", /* name */ |
| 111 | FALSE, /* partial_inplace */ |
| 112 | 0xffffffff, /* src_mask */ |
| 113 | 0xffffffff, /* dst_mask */ |
| 114 | TRUE), /* pcrel_offset */ |
| 115 | |
| 116 | /* 8 bit absolute. */ |
| 117 | HOWTO (R_ARM_ABS8, /* type */ |
| 118 | 0, /* rightshift */ |
| 119 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 120 | 8, /* bitsize */ |
| 121 | FALSE, /* pc_relative */ |
| 122 | 0, /* bitpos */ |
| 123 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 124 | bfd_elf_generic_reloc, /* special_function */ |
| 125 | "R_ARM_ABS8", /* name */ |
| 126 | FALSE, /* partial_inplace */ |
| 127 | 0x000000ff, /* src_mask */ |
| 128 | 0x000000ff, /* dst_mask */ |
| 129 | FALSE), /* pcrel_offset */ |
| 130 | |
| 131 | /* 16 bit absolute. */ |
| 132 | HOWTO (R_ARM_ABS16, /* type */ |
| 133 | 0, /* rightshift */ |
| 134 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 135 | 16, /* bitsize */ |
| 136 | FALSE, /* pc_relative */ |
| 137 | 0, /* bitpos */ |
| 138 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 139 | bfd_elf_generic_reloc, /* special_function */ |
| 140 | "R_ARM_ABS16", /* name */ |
| 141 | FALSE, /* partial_inplace */ |
| 142 | 0, /* src_mask */ |
| 143 | 0, /* dst_mask */ |
| 144 | FALSE), /* pcrel_offset */ |
| 145 | |
| 146 | /* 12 bit absolute. */ |
| 147 | HOWTO (R_ARM_ABS12, /* type */ |
| 148 | 0, /* rightshift */ |
| 149 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 150 | 12, /* bitsize */ |
| 151 | FALSE, /* pc_relative */ |
| 152 | 0, /* bitpos */ |
| 153 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 154 | bfd_elf_generic_reloc, /* special_function */ |
| 155 | "R_ARM_ABS12", /* name */ |
| 156 | FALSE, /* partial_inplace */ |
| 157 | 0x000008ff, /* src_mask */ |
| 158 | 0x000008ff, /* dst_mask */ |
| 159 | FALSE), /* pcrel_offset */ |
| 160 | |
| 161 | HOWTO (R_ARM_THM_ABS5, /* type */ |
| 162 | 6, /* rightshift */ |
| 163 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 164 | 5, /* bitsize */ |
| 165 | FALSE, /* pc_relative */ |
| 166 | 0, /* bitpos */ |
| 167 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 168 | bfd_elf_generic_reloc, /* special_function */ |
| 169 | "R_ARM_THM_ABS5", /* name */ |
| 170 | FALSE, /* partial_inplace */ |
| 171 | 0x000007e0, /* src_mask */ |
| 172 | 0x000007e0, /* dst_mask */ |
| 173 | FALSE), /* pcrel_offset */ |
| 174 | |
| 175 | HOWTO (R_ARM_THM_PC22, /* type */ |
| 176 | 1, /* rightshift */ |
| 177 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 178 | 23, /* bitsize */ |
| 179 | TRUE, /* pc_relative */ |
| 180 | 0, /* bitpos */ |
| 181 | complain_overflow_signed, /* complain_on_overflow */ |
| 182 | bfd_elf_generic_reloc, /* special_function */ |
| 183 | "R_ARM_THM_PC22", /* name */ |
| 184 | FALSE, /* partial_inplace */ |
| 185 | 0x07ff07ff, /* src_mask */ |
| 186 | 0x07ff07ff, /* dst_mask */ |
| 187 | TRUE), /* pcrel_offset */ |
| 188 | |
| 189 | HOWTO (R_ARM_SBREL32, /* type */ |
| 190 | 0, /* rightshift */ |
| 191 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 192 | 0, /* bitsize */ |
| 193 | FALSE, /* pc_relative */ |
| 194 | 0, /* bitpos */ |
| 195 | complain_overflow_dont,/* complain_on_overflow */ |
| 196 | bfd_elf_generic_reloc, /* special_function */ |
| 197 | "R_ARM_SBREL32", /* name */ |
| 198 | FALSE, /* partial_inplace */ |
| 199 | 0, /* src_mask */ |
| 200 | 0, /* dst_mask */ |
| 201 | FALSE), /* pcrel_offset */ |
| 202 | |
| 203 | HOWTO (R_ARM_AMP_VCALL9, /* type */ |
| 204 | 1, /* rightshift */ |
| 205 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 206 | 8, /* bitsize */ |
| 207 | TRUE, /* pc_relative */ |
| 208 | 0, /* bitpos */ |
| 209 | complain_overflow_signed, /* complain_on_overflow */ |
| 210 | bfd_elf_generic_reloc, /* special_function */ |
| 211 | "R_ARM_AMP_VCALL9", /* name */ |
| 212 | FALSE, /* partial_inplace */ |
| 213 | 0x000000ff, /* src_mask */ |
| 214 | 0x000000ff, /* dst_mask */ |
| 215 | TRUE), /* pcrel_offset */ |
| 216 | |
| 217 | /* 12 bit pc relative. */ |
| 218 | HOWTO (R_ARM_THM_PC11, /* type */ |
| 219 | 1, /* rightshift */ |
| 220 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 221 | 11, /* bitsize */ |
| 222 | TRUE, /* pc_relative */ |
| 223 | 0, /* bitpos */ |
| 224 | complain_overflow_signed, /* complain_on_overflow */ |
| 225 | bfd_elf_generic_reloc, /* special_function */ |
| 226 | "R_ARM_THM_PC11", /* name */ |
| 227 | FALSE, /* partial_inplace */ |
| 228 | 0x000007ff, /* src_mask */ |
| 229 | 0x000007ff, /* dst_mask */ |
| 230 | TRUE), /* pcrel_offset */ |
| 231 | |
| 232 | /* 12 bit pc relative. */ |
| 233 | HOWTO (R_ARM_THM_PC9, /* type */ |
| 234 | 1, /* rightshift */ |
| 235 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 236 | 8, /* bitsize */ |
| 237 | TRUE, /* pc_relative */ |
| 238 | 0, /* bitpos */ |
| 239 | complain_overflow_signed, /* complain_on_overflow */ |
| 240 | bfd_elf_generic_reloc, /* special_function */ |
| 241 | "R_ARM_THM_PC9", /* name */ |
| 242 | FALSE, /* partial_inplace */ |
| 243 | 0x000000ff, /* src_mask */ |
| 244 | 0x000000ff, /* dst_mask */ |
| 245 | TRUE), /* pcrel_offset */ |
| 246 | |
| 247 | /* GNU extension to record C++ vtable hierarchy. */ |
| 248 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ |
| 249 | 0, /* rightshift */ |
| 250 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 251 | 0, /* bitsize */ |
| 252 | FALSE, /* pc_relative */ |
| 253 | 0, /* bitpos */ |
| 254 | complain_overflow_dont, /* complain_on_overflow */ |
| 255 | NULL, /* special_function */ |
| 256 | "R_ARM_GNU_VTINHERIT", /* name */ |
| 257 | FALSE, /* partial_inplace */ |
| 258 | 0, /* src_mask */ |
| 259 | 0, /* dst_mask */ |
| 260 | FALSE), /* pcrel_offset */ |
| 261 | |
| 262 | /* GNU extension to record C++ vtable member usage. */ |
| 263 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ |
| 264 | 0, /* rightshift */ |
| 265 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 266 | 0, /* bitsize */ |
| 267 | FALSE, /* pc_relative */ |
| 268 | 0, /* bitpos */ |
| 269 | complain_overflow_dont, /* complain_on_overflow */ |
| 270 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 271 | "R_ARM_GNU_VTENTRY", /* name */ |
| 272 | FALSE, /* partial_inplace */ |
| 273 | 0, /* src_mask */ |
| 274 | 0, /* dst_mask */ |
| 275 | FALSE), /* pcrel_offset */ |
| 276 | |
| 277 | /* XXX - gap in index numbering here. */ |
| 278 | |
| 279 | HOWTO (R_ARM_PLT32, /* type */ |
| 280 | 2, /* rightshift */ |
| 281 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 282 | 26, /* bitsize */ |
| 283 | TRUE, /* pc_relative */ |
| 284 | 0, /* bitpos */ |
| 285 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 286 | bfd_elf_generic_reloc, /* special_function */ |
| 287 | "R_ARM_PLT32", /* name */ |
| 288 | TRUE, /* partial_inplace */ |
| 289 | 0x00ffffff, /* src_mask */ |
| 290 | 0x00ffffff, /* dst_mask */ |
| 291 | TRUE), /* pcrel_offset */ |
| 292 | |
| 293 | /* XXX - gap in index numbering here. */ |
| 294 | |
| 295 | HOWTO (R_ARM_RREL32, /* type */ |
| 296 | 0, /* rightshift */ |
| 297 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 298 | 0, /* bitsize */ |
| 299 | FALSE, /* pc_relative */ |
| 300 | 0, /* bitpos */ |
| 301 | complain_overflow_dont, /* complain_on_overflow */ |
| 302 | bfd_elf_generic_reloc, /* special_function */ |
| 303 | "R_ARM_RREL32", /* name */ |
| 304 | FALSE, /* partial_inplace */ |
| 305 | 0, /* src_mask */ |
| 306 | 0, /* dst_mask */ |
| 307 | FALSE), /* pcrel_offset */ |
| 308 | |
| 309 | HOWTO (R_ARM_RABS32, /* type */ |
| 310 | 0, /* rightshift */ |
| 311 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 312 | 0, /* bitsize */ |
| 313 | FALSE, /* pc_relative */ |
| 314 | 0, /* bitpos */ |
| 315 | complain_overflow_dont, /* complain_on_overflow */ |
| 316 | bfd_elf_generic_reloc, /* special_function */ |
| 317 | "R_ARM_RABS32", /* name */ |
| 318 | FALSE, /* partial_inplace */ |
| 319 | 0, /* src_mask */ |
| 320 | 0, /* dst_mask */ |
| 321 | FALSE), /* pcrel_offset */ |
| 322 | |
| 323 | HOWTO (R_ARM_RPC24, /* type */ |
| 324 | 0, /* rightshift */ |
| 325 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 326 | 0, /* bitsize */ |
| 327 | FALSE, /* pc_relative */ |
| 328 | 0, /* bitpos */ |
| 329 | complain_overflow_dont, /* complain_on_overflow */ |
| 330 | bfd_elf_generic_reloc, /* special_function */ |
| 331 | "R_ARM_RPC24", /* name */ |
| 332 | FALSE, /* partial_inplace */ |
| 333 | 0, /* src_mask */ |
| 334 | 0, /* dst_mask */ |
| 335 | FALSE), /* pcrel_offset */ |
| 336 | |
| 337 | HOWTO (R_ARM_RBASE, /* type */ |
| 338 | 0, /* rightshift */ |
| 339 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 340 | 0, /* bitsize */ |
| 341 | FALSE, /* pc_relative */ |
| 342 | 0, /* bitpos */ |
| 343 | complain_overflow_dont, /* complain_on_overflow */ |
| 344 | bfd_elf_generic_reloc, /* special_function */ |
| 345 | "R_ARM_RBASE", /* name */ |
| 346 | FALSE, /* partial_inplace */ |
| 347 | 0, /* src_mask */ |
| 348 | 0, /* dst_mask */ |
| 349 | FALSE) /* pcrel_offset */ |
| 350 | }; |
| 351 | |
| 352 | /* Locate a reloc in the howto table. This function must be used |
| 353 | when the entry number is is > R_ARM_GNU_VTINHERIT. */ |
| 354 | |
| 355 | static reloc_howto_type * |
| 356 | find_howto (r_type) |
| 357 | unsigned int r_type; |
| 358 | { |
| 359 | int i; |
| 360 | |
| 361 | for (i = NUM_ELEM (elf32_arm_howto_table); i--;) |
| 362 | if (elf32_arm_howto_table [i].type == r_type) |
| 363 | return elf32_arm_howto_table + i; |
| 364 | |
| 365 | return NULL; |
| 366 | } |
| 367 | |
| 368 | static void |
| 369 | elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc) |
| 370 | bfd *abfd ATTRIBUTE_UNUSED; |
| 371 | arelent *bfd_reloc; |
| 372 | Elf_Internal_Rela *elf_reloc; |
| 373 | { |
| 374 | unsigned int r_type; |
| 375 | |
| 376 | r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| 377 | |
| 378 | if (r_type <= R_ARM_GNU_VTINHERIT) |
| 379 | bfd_reloc->howto = & elf32_arm_howto_table[r_type]; |
| 380 | else |
| 381 | bfd_reloc->howto = find_howto (r_type); |
| 382 | } |
| 383 | |
| 384 | struct elf32_arm_reloc_map |
| 385 | { |
| 386 | bfd_reloc_code_real_type bfd_reloc_val; |
| 387 | unsigned char elf_reloc_val; |
| 388 | }; |
| 389 | |
| 390 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = |
| 391 | { |
| 392 | {BFD_RELOC_NONE, R_ARM_NONE }, |
| 393 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24 }, |
| 394 | {BFD_RELOC_32, R_ARM_ABS32 }, |
| 395 | {BFD_RELOC_32_PCREL, R_ARM_REL32 }, |
| 396 | {BFD_RELOC_8, R_ARM_ABS8 }, |
| 397 | {BFD_RELOC_16, R_ARM_ABS16 }, |
| 398 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12 }, |
| 399 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5 }, |
| 400 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22 }, |
| 401 | {BFD_RELOC_NONE, R_ARM_SBREL32 }, |
| 402 | {BFD_RELOC_NONE, R_ARM_AMP_VCALL9 }, |
| 403 | {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11 }, |
| 404 | {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9 }, |
| 405 | {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT }, |
| 406 | {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY } |
| 407 | }; |
| 408 | |
| 409 | static reloc_howto_type * |
| 410 | elf32_arm_reloc_type_lookup (abfd, code) |
| 411 | bfd * abfd ATTRIBUTE_UNUSED; |
| 412 | bfd_reloc_code_real_type code; |
| 413 | { |
| 414 | unsigned int i; |
| 415 | |
| 416 | for (i = NUM_ELEM (elf32_arm_reloc_map); i--;) |
| 417 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) |
| 418 | return & elf32_arm_howto_table [elf32_arm_reloc_map[i].elf_reloc_val]; |
| 419 | |
| 420 | if (code == BFD_RELOC_ARM_PLT32) |
| 421 | return find_howto (R_ARM_PLT32); |
| 422 | |
| 423 | return NULL; |
| 424 | } |
| 425 | |
| 426 | #include "elf32-arm.h" |