| 1 | /* 32-bit ELF support for TI PRU. |
| 2 | Copyright (C) 2014-2020 Free Software Foundation, Inc. |
| 3 | Contributed by Dimitar Dimitrov <dimitar@dinux.eu> |
| 4 | Based on elf32-nios2.c |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | /* This file handles TI PRU ELF targets. */ |
| 24 | |
| 25 | #include "sysdep.h" |
| 26 | #include "bfd.h" |
| 27 | #include "libbfd.h" |
| 28 | #include "bfdlink.h" |
| 29 | #include "genlink.h" |
| 30 | #include "elf-bfd.h" |
| 31 | #include "elf/pru.h" |
| 32 | #include "opcode/pru.h" |
| 33 | #include "libiberty.h" |
| 34 | |
| 35 | /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */ |
| 36 | #define OCTETS_PER_BYTE(ABFD, SEC) 1 |
| 37 | |
| 38 | #define SWAP_VALS(A,B) \ |
| 39 | do { \ |
| 40 | (A) ^= (B); \ |
| 41 | (B) ^= (A); \ |
| 42 | (A) ^= (B); \ |
| 43 | } while (0) |
| 44 | |
| 45 | /* Enable debugging printout at stdout with this variable. */ |
| 46 | static bfd_boolean debug_relax = FALSE; |
| 47 | |
| 48 | /* Forward declarations. */ |
| 49 | static bfd_reloc_status_type pru_elf32_pmem_relocate |
| 50 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 51 | static bfd_reloc_status_type pru_elf32_s10_pcrel_relocate |
| 52 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 53 | static bfd_reloc_status_type pru_elf32_u8_pcrel_relocate |
| 54 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 55 | static bfd_reloc_status_type pru_elf32_ldi32_relocate |
| 56 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 57 | static bfd_reloc_status_type bfd_elf_pru_diff_relocate |
| 58 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 59 | |
| 60 | /* Target vector. */ |
| 61 | extern const bfd_target pru_elf32_vec; |
| 62 | |
| 63 | /* The relocation table used for SHT_REL sections. */ |
| 64 | static reloc_howto_type elf_pru_howto_table_rel[] = { |
| 65 | /* No relocation. */ |
| 66 | HOWTO (R_PRU_NONE, /* type */ |
| 67 | 0, /* rightshift */ |
| 68 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 69 | 3, /* bitsize */ |
| 70 | FALSE, /* pc_relative */ |
| 71 | 0, /* bitpos */ |
| 72 | complain_overflow_dont,/* complain_on_overflow */ |
| 73 | bfd_elf_generic_reloc, /* special_function */ |
| 74 | "R_PRU_NONE", /* name */ |
| 75 | FALSE, /* partial_inplace */ |
| 76 | 0, /* src_mask */ |
| 77 | 0, /* dst_mask */ |
| 78 | FALSE), /* pcrel_offset */ |
| 79 | |
| 80 | HOWTO (R_PRU_16_PMEM, |
| 81 | 2, |
| 82 | 1, /* short */ |
| 83 | 32, |
| 84 | FALSE, |
| 85 | 0, |
| 86 | complain_overflow_dont, |
| 87 | bfd_elf_generic_reloc, |
| 88 | "R_PRU_16_PMEM", |
| 89 | FALSE, |
| 90 | 0, /* src_mask */ |
| 91 | 0xffff, |
| 92 | FALSE), |
| 93 | |
| 94 | HOWTO (R_PRU_U16_PMEMIMM, |
| 95 | 2, |
| 96 | 2, |
| 97 | 32, |
| 98 | FALSE, |
| 99 | 8, |
| 100 | complain_overflow_unsigned, |
| 101 | pru_elf32_pmem_relocate, |
| 102 | "R_PRU_U16_PMEMIMM", |
| 103 | FALSE, |
| 104 | 0, /* src_mask */ |
| 105 | 0x00ffff00, |
| 106 | FALSE), |
| 107 | |
| 108 | HOWTO (R_PRU_BFD_RELOC_16, |
| 109 | 0, |
| 110 | 1, /* short */ |
| 111 | 16, |
| 112 | FALSE, |
| 113 | 0, |
| 114 | complain_overflow_bitfield, |
| 115 | bfd_elf_generic_reloc, |
| 116 | "R_PRU_BFD_RELOC16", |
| 117 | FALSE, |
| 118 | 0, /* src_mask */ |
| 119 | 0x0000ffff, |
| 120 | FALSE), |
| 121 | |
| 122 | /* 16-bit unsigned immediate relocation. */ |
| 123 | HOWTO (R_PRU_U16, /* type */ |
| 124 | 0, /* rightshift */ |
| 125 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 126 | 16, /* bitsize */ |
| 127 | FALSE, /* pc_relative */ |
| 128 | 8, /* bitpos */ |
| 129 | complain_overflow_unsigned, /* complain on overflow */ |
| 130 | bfd_elf_generic_reloc, /* special function */ |
| 131 | "R_PRU_U16", /* name */ |
| 132 | FALSE, /* partial_inplace */ |
| 133 | 0, /* src_mask */ |
| 134 | 0x00ffff00, /* dest_mask */ |
| 135 | FALSE), /* pcrel_offset */ |
| 136 | |
| 137 | HOWTO (R_PRU_32_PMEM, |
| 138 | 2, |
| 139 | 2, /* long */ |
| 140 | 32, |
| 141 | FALSE, |
| 142 | 0, |
| 143 | complain_overflow_dont, |
| 144 | pru_elf32_pmem_relocate, |
| 145 | "R_PRU_32_PMEM", |
| 146 | FALSE, |
| 147 | 0, /* src_mask */ |
| 148 | 0xffffffff, |
| 149 | FALSE), |
| 150 | |
| 151 | HOWTO (R_PRU_BFD_RELOC_32, |
| 152 | 0, |
| 153 | 2, /* long */ |
| 154 | 32, |
| 155 | FALSE, |
| 156 | 0, |
| 157 | complain_overflow_dont, |
| 158 | bfd_elf_generic_reloc, |
| 159 | "R_PRU_BFD_RELOC32", |
| 160 | FALSE, |
| 161 | 0, /* src_mask */ |
| 162 | 0xffffffff, |
| 163 | FALSE), |
| 164 | |
| 165 | HOWTO (R_PRU_S10_PCREL, |
| 166 | 2, |
| 167 | 2, |
| 168 | 10, |
| 169 | TRUE, |
| 170 | 0, |
| 171 | complain_overflow_bitfield, |
| 172 | pru_elf32_s10_pcrel_relocate, |
| 173 | "R_PRU_S10_PCREL", |
| 174 | FALSE, |
| 175 | 0, /* src_mask */ |
| 176 | 0x060000ff, |
| 177 | TRUE), |
| 178 | |
| 179 | HOWTO (R_PRU_U8_PCREL, |
| 180 | 2, |
| 181 | 2, |
| 182 | 8, |
| 183 | TRUE, |
| 184 | 0, |
| 185 | complain_overflow_unsigned, |
| 186 | pru_elf32_u8_pcrel_relocate, |
| 187 | "R_PRU_U8_PCREL", |
| 188 | FALSE, |
| 189 | 0, /* src_mask */ |
| 190 | 0x000000ff, |
| 191 | TRUE), |
| 192 | |
| 193 | HOWTO (R_PRU_LDI32, |
| 194 | 0, /* rightshift */ |
| 195 | 4, /* size (4 = 8bytes) */ |
| 196 | 32, /* bitsize */ |
| 197 | FALSE, /* pc_relative */ |
| 198 | 0, /* bitpos */ |
| 199 | complain_overflow_unsigned, /* complain on overflow */ |
| 200 | pru_elf32_ldi32_relocate, /* special function */ |
| 201 | "R_PRU_LDI32", /* name */ |
| 202 | FALSE, /* partial_inplace */ |
| 203 | 0, /* src_mask */ |
| 204 | 0xffffffff, /* dest_mask */ |
| 205 | FALSE), /* pcrel_offset */ |
| 206 | |
| 207 | /* GNU-specific relocations. */ |
| 208 | HOWTO (R_PRU_GNU_BFD_RELOC_8, |
| 209 | 0, |
| 210 | 0, /* byte */ |
| 211 | 8, |
| 212 | FALSE, |
| 213 | 0, |
| 214 | complain_overflow_bitfield, |
| 215 | bfd_elf_generic_reloc, |
| 216 | "R_PRU_BFD_RELOC8", |
| 217 | FALSE, |
| 218 | 0, /* src_mask */ |
| 219 | 0x000000ff, |
| 220 | FALSE), |
| 221 | |
| 222 | HOWTO (R_PRU_GNU_DIFF8, /* type */ |
| 223 | 0, /* rightshift */ |
| 224 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 225 | 8, /* bitsize */ |
| 226 | FALSE, /* pc_relative */ |
| 227 | 0, /* bitpos */ |
| 228 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 229 | bfd_elf_pru_diff_relocate, /* special_function */ |
| 230 | "R_PRU_DIFF8", /* name */ |
| 231 | FALSE, /* partial_inplace */ |
| 232 | 0, /* src_mask */ |
| 233 | 0xff, /* dst_mask */ |
| 234 | FALSE), /* pcrel_offset */ |
| 235 | |
| 236 | HOWTO (R_PRU_GNU_DIFF16, /* type */ |
| 237 | 0, /* rightshift */ |
| 238 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 239 | 16, /* bitsize */ |
| 240 | FALSE, /* pc_relative */ |
| 241 | 0, /* bitpos */ |
| 242 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 243 | bfd_elf_pru_diff_relocate,/* special_function */ |
| 244 | "R_PRU_DIFF16", /* name */ |
| 245 | FALSE, /* partial_inplace */ |
| 246 | 0, /* src_mask */ |
| 247 | 0xffff, /* dst_mask */ |
| 248 | FALSE), /* pcrel_offset */ |
| 249 | |
| 250 | HOWTO (R_PRU_GNU_DIFF32, /* type */ |
| 251 | 0, /* rightshift */ |
| 252 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 253 | 32, /* bitsize */ |
| 254 | FALSE, /* pc_relative */ |
| 255 | 0, /* bitpos */ |
| 256 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 257 | bfd_elf_pru_diff_relocate,/* special_function */ |
| 258 | "R_PRU_DIFF32", /* name */ |
| 259 | FALSE, /* partial_inplace */ |
| 260 | 0, /* src_mask */ |
| 261 | 0xffffffff, /* dst_mask */ |
| 262 | FALSE), /* pcrel_offset */ |
| 263 | |
| 264 | HOWTO (R_PRU_GNU_DIFF16_PMEM, /* type */ |
| 265 | 0, /* rightshift */ |
| 266 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 267 | 16, /* bitsize */ |
| 268 | FALSE, /* pc_relative */ |
| 269 | 0, /* bitpos */ |
| 270 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 271 | bfd_elf_pru_diff_relocate,/* special_function */ |
| 272 | "R_PRU_DIFF16_PMEM", /* name */ |
| 273 | FALSE, /* partial_inplace */ |
| 274 | 0, /* src_mask */ |
| 275 | 0xffff, /* dst_mask */ |
| 276 | FALSE), /* pcrel_offset */ |
| 277 | |
| 278 | HOWTO (R_PRU_GNU_DIFF32_PMEM, /* type */ |
| 279 | 0, /* rightshift */ |
| 280 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 281 | 32, /* bitsize */ |
| 282 | FALSE, /* pc_relative */ |
| 283 | 0, /* bitpos */ |
| 284 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 285 | bfd_elf_pru_diff_relocate,/* special_function */ |
| 286 | "R_PRU_DIFF32_PMEM", /* name */ |
| 287 | FALSE, /* partial_inplace */ |
| 288 | 0, /* src_mask */ |
| 289 | 0xffffffff, /* dst_mask */ |
| 290 | FALSE), /* pcrel_offset */ |
| 291 | |
| 292 | /* Add other relocations here. */ |
| 293 | }; |
| 294 | |
| 295 | static unsigned char elf_code_to_howto_index[R_PRU_ILLEGAL + 1]; |
| 296 | |
| 297 | /* Return the howto for relocation RTYPE. */ |
| 298 | |
| 299 | static reloc_howto_type * |
| 300 | lookup_howto (unsigned int rtype) |
| 301 | { |
| 302 | static bfd_boolean initialized = FALSE; |
| 303 | int i; |
| 304 | int howto_tbl_size = (int) (sizeof (elf_pru_howto_table_rel) |
| 305 | / sizeof (elf_pru_howto_table_rel[0])); |
| 306 | |
| 307 | if (! initialized) |
| 308 | { |
| 309 | initialized = TRUE; |
| 310 | memset (elf_code_to_howto_index, 0xff, |
| 311 | sizeof (elf_code_to_howto_index)); |
| 312 | for (i = 0; i < howto_tbl_size; i++) |
| 313 | elf_code_to_howto_index[elf_pru_howto_table_rel[i].type] = i; |
| 314 | } |
| 315 | |
| 316 | if (rtype > R_PRU_ILLEGAL) |
| 317 | return NULL; |
| 318 | i = elf_code_to_howto_index[rtype]; |
| 319 | if (i >= howto_tbl_size) |
| 320 | return NULL; |
| 321 | return elf_pru_howto_table_rel + i; |
| 322 | } |
| 323 | |
| 324 | /* Map for converting BFD reloc types to PRU reloc types. */ |
| 325 | |
| 326 | struct elf_reloc_map |
| 327 | { |
| 328 | bfd_reloc_code_real_type bfd_val; |
| 329 | enum elf_pru_reloc_type elf_val; |
| 330 | }; |
| 331 | |
| 332 | static const struct elf_reloc_map pru_reloc_map[] = |
| 333 | { |
| 334 | {BFD_RELOC_NONE, R_PRU_NONE}, |
| 335 | {BFD_RELOC_PRU_16_PMEM, R_PRU_16_PMEM}, |
| 336 | {BFD_RELOC_PRU_U16_PMEMIMM, R_PRU_U16_PMEMIMM}, |
| 337 | {BFD_RELOC_16, R_PRU_BFD_RELOC_16}, |
| 338 | {BFD_RELOC_PRU_U16, R_PRU_U16}, |
| 339 | {BFD_RELOC_PRU_32_PMEM, R_PRU_32_PMEM}, |
| 340 | {BFD_RELOC_32, R_PRU_BFD_RELOC_32}, |
| 341 | {BFD_RELOC_PRU_S10_PCREL, R_PRU_S10_PCREL}, |
| 342 | {BFD_RELOC_PRU_U8_PCREL, R_PRU_U8_PCREL}, |
| 343 | {BFD_RELOC_PRU_LDI32, R_PRU_LDI32}, |
| 344 | |
| 345 | {BFD_RELOC_8, R_PRU_GNU_BFD_RELOC_8}, |
| 346 | {BFD_RELOC_PRU_GNU_DIFF8, R_PRU_GNU_DIFF8}, |
| 347 | {BFD_RELOC_PRU_GNU_DIFF16, R_PRU_GNU_DIFF16}, |
| 348 | {BFD_RELOC_PRU_GNU_DIFF32, R_PRU_GNU_DIFF32}, |
| 349 | {BFD_RELOC_PRU_GNU_DIFF16_PMEM, R_PRU_GNU_DIFF16_PMEM}, |
| 350 | {BFD_RELOC_PRU_GNU_DIFF32_PMEM, R_PRU_GNU_DIFF32_PMEM}, |
| 351 | }; |
| 352 | |
| 353 | |
| 354 | /* Assorted hash table functions. */ |
| 355 | |
| 356 | /* Create an entry in a PRU ELF linker hash table. */ |
| 357 | |
| 358 | static struct bfd_hash_entry * |
| 359 | link_hash_newfunc (struct bfd_hash_entry *entry, |
| 360 | struct bfd_hash_table *table, const char *string) |
| 361 | { |
| 362 | /* Allocate the structure if it has not already been allocated by a |
| 363 | subclass. */ |
| 364 | if (entry == NULL) |
| 365 | { |
| 366 | entry = bfd_hash_allocate (table, |
| 367 | sizeof (struct elf_link_hash_entry)); |
| 368 | if (entry == NULL) |
| 369 | return entry; |
| 370 | } |
| 371 | |
| 372 | /* Call the allocation method of the superclass. */ |
| 373 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 374 | |
| 375 | return entry; |
| 376 | } |
| 377 | |
| 378 | /* Implement bfd_elf32_bfd_reloc_type_lookup: |
| 379 | Given a BFD reloc type, return a howto structure. */ |
| 380 | |
| 381 | static reloc_howto_type * |
| 382 | pru_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 383 | bfd_reloc_code_real_type code) |
| 384 | { |
| 385 | unsigned int i; |
| 386 | |
| 387 | for (i = 0; i < ARRAY_SIZE (pru_reloc_map); ++i) |
| 388 | if (pru_reloc_map[i].bfd_val == code) |
| 389 | return lookup_howto ((unsigned int) pru_reloc_map[i].elf_val); |
| 390 | return NULL; |
| 391 | } |
| 392 | |
| 393 | /* Implement bfd_elf32_bfd_reloc_name_lookup: |
| 394 | Given a reloc name, return a howto structure. */ |
| 395 | |
| 396 | static reloc_howto_type * |
| 397 | pru_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 398 | const char *r_name) |
| 399 | { |
| 400 | unsigned int i; |
| 401 | |
| 402 | for (i = 0; i < ARRAY_SIZE (elf_pru_howto_table_rel); i++) |
| 403 | if (elf_pru_howto_table_rel[i].name |
| 404 | && strcasecmp (elf_pru_howto_table_rel[i].name, r_name) == 0) |
| 405 | return &elf_pru_howto_table_rel[i]; |
| 406 | |
| 407 | return NULL; |
| 408 | } |
| 409 | |
| 410 | /* Implement elf_info_to_howto: |
| 411 | Given a ELF32 relocation, fill in a arelent structure. */ |
| 412 | |
| 413 | static bfd_boolean |
| 414 | pru_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr, |
| 415 | Elf_Internal_Rela *dst) |
| 416 | { |
| 417 | unsigned int r_type; |
| 418 | |
| 419 | r_type = ELF32_R_TYPE (dst->r_info); |
| 420 | if (r_type >= R_PRU_ILLEGAL) |
| 421 | { |
| 422 | /* xgettext:c-format */ |
| 423 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, r_type); |
| 424 | bfd_set_error (bfd_error_bad_value); |
| 425 | return FALSE; |
| 426 | } |
| 427 | |
| 428 | cache_ptr->howto = lookup_howto (r_type); |
| 429 | return cache_ptr->howto != NULL; |
| 430 | } |
| 431 | |
| 432 | /* Do the relocations that require special handling. */ |
| 433 | /* Produce a word address for program memory. Linker scripts will put .text |
| 434 | at a high offset in order to differentiate it from .data. So here we also |
| 435 | mask the high bits of PMEM address. |
| 436 | |
| 437 | But why 1MB when internal Program Memory much smaller? We want to catch |
| 438 | unintended overflows. |
| 439 | |
| 440 | Why not use (1<<31) as an offset and a mask? Sitara DDRAM usually resides |
| 441 | there, and users might want to put some shared carveout memory region in |
| 442 | their linker scripts. So 0x80000000 might be a valid .data address. |
| 443 | |
| 444 | Note that we still keep and pass down the original howto. This way we |
| 445 | can reuse this function for several different relocations. */ |
| 446 | static bfd_reloc_status_type |
| 447 | pru_elf32_do_pmem_relocate (bfd *abfd, reloc_howto_type *howto, |
| 448 | asection *input_section, |
| 449 | bfd_byte *data, bfd_vma offset, |
| 450 | bfd_vma symbol_value, bfd_vma addend) |
| 451 | { |
| 452 | symbol_value = symbol_value + addend; |
| 453 | addend = 0; |
| 454 | symbol_value &= 0x3fffff; |
| 455 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 456 | data, offset, symbol_value, addend); |
| 457 | } |
| 458 | |
| 459 | /* Direct copy of _bfd_final_link_relocate, but with special |
| 460 | "fill-in". This copy-paste mumbo jumbo is only needed because BFD |
| 461 | cannot deal correctly with non-contiguous bit fields. */ |
| 462 | static bfd_reloc_status_type |
| 463 | pru_elf32_do_s10_pcrel_relocate (bfd *input_bfd, reloc_howto_type *howto, |
| 464 | asection *input_section, |
| 465 | bfd_byte *contents, bfd_vma address, |
| 466 | bfd_vma relocation, bfd_vma addend) |
| 467 | { |
| 468 | bfd_byte *location; |
| 469 | bfd_vma x = 0; |
| 470 | bfd_vma qboff; |
| 471 | bfd_reloc_status_type flag = bfd_reloc_ok; |
| 472 | |
| 473 | /* Sanity check the address. */ |
| 474 | if (address > bfd_get_section_limit (input_bfd, input_section)) |
| 475 | return bfd_reloc_outofrange; |
| 476 | |
| 477 | BFD_ASSERT (howto->pc_relative); |
| 478 | BFD_ASSERT (howto->pcrel_offset); |
| 479 | |
| 480 | relocation = relocation + addend - (input_section->output_section->vma |
| 481 | + input_section->output_offset) - address; |
| 482 | |
| 483 | location = contents + address; |
| 484 | |
| 485 | /* Get the value we are going to relocate. */ |
| 486 | BFD_ASSERT (bfd_get_reloc_size (howto) == 4); |
| 487 | x = bfd_get_32 (input_bfd, location); |
| 488 | |
| 489 | qboff = GET_BROFF_SIGNED (x) << howto->rightshift; |
| 490 | relocation += qboff; |
| 491 | |
| 492 | BFD_ASSERT (howto->complain_on_overflow == complain_overflow_bitfield); |
| 493 | |
| 494 | if (relocation > 2047 && relocation < (bfd_vma)-2048l) |
| 495 | flag = bfd_reloc_overflow; |
| 496 | |
| 497 | /* Check that target address is word-aligned. */ |
| 498 | if (relocation & ((1 << howto->rightshift) - 1)) |
| 499 | flag = bfd_reloc_outofrange; |
| 500 | |
| 501 | relocation >>= (bfd_vma) howto->rightshift; |
| 502 | |
| 503 | /* Fill-in the RELOCATION to the right bits of X. */ |
| 504 | SET_BROFF_URAW (x, relocation); |
| 505 | |
| 506 | bfd_put_32 (input_bfd, x, location); |
| 507 | |
| 508 | return flag; |
| 509 | } |
| 510 | |
| 511 | static bfd_reloc_status_type |
| 512 | pru_elf32_do_u8_pcrel_relocate (bfd *abfd, reloc_howto_type *howto, |
| 513 | asection *input_section, |
| 514 | bfd_byte *data, bfd_vma offset, |
| 515 | bfd_vma symbol_value, bfd_vma addend) |
| 516 | { |
| 517 | bfd_vma relocation; |
| 518 | |
| 519 | BFD_ASSERT (howto->pc_relative); |
| 520 | BFD_ASSERT (howto->pcrel_offset); |
| 521 | |
| 522 | relocation = symbol_value + addend - (input_section->output_section->vma |
| 523 | + input_section->output_offset) - offset; |
| 524 | relocation >>= howto->rightshift; |
| 525 | |
| 526 | /* 0 and 1 are invalid target labels for LOOP. We cannot |
| 527 | encode this info in HOWTO, so catch such cases here. */ |
| 528 | if (relocation < 2) |
| 529 | return bfd_reloc_outofrange; |
| 530 | |
| 531 | return _bfd_final_link_relocate (howto, abfd, input_section, |
| 532 | data, offset, symbol_value, addend); |
| 533 | } |
| 534 | |
| 535 | /* Idea and code taken from elf32-d30v. */ |
| 536 | static bfd_reloc_status_type |
| 537 | pru_elf32_do_ldi32_relocate (bfd *abfd, reloc_howto_type *howto, |
| 538 | asection *input_section, |
| 539 | bfd_byte *data, bfd_vma offset, |
| 540 | bfd_vma symbol_value, bfd_vma addend) |
| 541 | { |
| 542 | bfd_signed_vma relocation; |
| 543 | bfd_size_type octets = offset * OCTETS_PER_BYTE (abfd, input_section); |
| 544 | bfd_byte *location; |
| 545 | unsigned long in1, in2; |
| 546 | |
| 547 | /* A hacked-up version of _bfd_final_link_relocate() follows. */ |
| 548 | |
| 549 | /* Sanity check the address. */ |
| 550 | if (octets + bfd_get_reloc_size (howto) |
| 551 | > bfd_get_section_limit_octets (abfd, input_section)) |
| 552 | return bfd_reloc_outofrange; |
| 553 | |
| 554 | /* This function assumes that we are dealing with a basic relocation |
| 555 | against a symbol. We want to compute the value of the symbol to |
| 556 | relocate to. This is just VALUE, the value of the symbol, plus |
| 557 | ADDEND, any addend associated with the reloc. */ |
| 558 | relocation = symbol_value + addend; |
| 559 | |
| 560 | BFD_ASSERT (!howto->pc_relative); |
| 561 | |
| 562 | /* A hacked-up version of _bfd_relocate_contents() follows. */ |
| 563 | location = data + octets; |
| 564 | |
| 565 | BFD_ASSERT (!howto->pc_relative); |
| 566 | |
| 567 | in1 = bfd_get_32 (abfd, location); |
| 568 | in2 = bfd_get_32 (abfd, location + 4); |
| 569 | |
| 570 | SET_INSN_FIELD (IMM16, in1, relocation >> 16); |
| 571 | SET_INSN_FIELD (IMM16, in2, relocation & 0xffff); |
| 572 | |
| 573 | bfd_put_32 (abfd, in1, location); |
| 574 | bfd_put_32 (abfd, in2, location + 4); |
| 575 | |
| 576 | /* Old GAS and LD versions have a bug, where the two |
| 577 | LDI instructions are swapped. Detect such object |
| 578 | files and bail. */ |
| 579 | if (GET_INSN_FIELD (RDSEL, in1) != RSEL_31_16) |
| 580 | { |
| 581 | /* xgettext:c-format */ |
| 582 | _bfd_error_handler (_("error: %pB: old incompatible object file detected"), |
| 583 | abfd); |
| 584 | return bfd_reloc_notsupported; |
| 585 | } |
| 586 | |
| 587 | return bfd_reloc_ok; |
| 588 | } |
| 589 | |
| 590 | /* HOWTO handlers for relocations that require special handling. */ |
| 591 | |
| 592 | static bfd_reloc_status_type |
| 593 | pru_elf32_pmem_relocate (bfd *abfd, arelent *reloc_entry, |
| 594 | asymbol *symbol, void *data, |
| 595 | asection *input_section, bfd *output_bfd, |
| 596 | char **error_message) |
| 597 | { |
| 598 | /* If this is a relocatable link (output_bfd test tells us), just |
| 599 | call the generic function. Any adjustment will be done at final |
| 600 | link time. */ |
| 601 | if (output_bfd != NULL) |
| 602 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 603 | input_section, output_bfd, error_message); |
| 604 | |
| 605 | BFD_ASSERT (0); |
| 606 | return pru_elf32_do_pmem_relocate (abfd, reloc_entry->howto, |
| 607 | input_section, |
| 608 | data, reloc_entry->address, |
| 609 | (symbol->value |
| 610 | + symbol->section->output_section->vma |
| 611 | + symbol->section->output_offset), |
| 612 | reloc_entry->addend); |
| 613 | } |
| 614 | |
| 615 | static bfd_reloc_status_type |
| 616 | pru_elf32_s10_pcrel_relocate (bfd *abfd, arelent *reloc_entry, |
| 617 | asymbol *symbol, void *data, |
| 618 | asection *input_section, bfd *output_bfd, |
| 619 | char **error_message) |
| 620 | { |
| 621 | /* If this is a relocatable link (output_bfd test tells us), just |
| 622 | call the generic function. Any adjustment will be done at final |
| 623 | link time. */ |
| 624 | if (output_bfd != NULL) |
| 625 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 626 | input_section, output_bfd, error_message); |
| 627 | |
| 628 | return pru_elf32_do_s10_pcrel_relocate (abfd, reloc_entry->howto, |
| 629 | input_section, data, |
| 630 | reloc_entry->address, |
| 631 | (symbol->value |
| 632 | + symbol->section->output_section->vma |
| 633 | + symbol->section->output_offset), |
| 634 | reloc_entry->addend); |
| 635 | } |
| 636 | |
| 637 | static bfd_reloc_status_type |
| 638 | pru_elf32_u8_pcrel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 639 | void *data, asection *input_section, |
| 640 | bfd *output_bfd, |
| 641 | char **error_message) |
| 642 | { |
| 643 | /* If this is a relocatable link (output_bfd test tells us), just |
| 644 | call the generic function. Any adjustment will be done at final |
| 645 | link time. */ |
| 646 | if (output_bfd != NULL) |
| 647 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 648 | input_section, output_bfd, error_message); |
| 649 | |
| 650 | return pru_elf32_do_u8_pcrel_relocate (abfd, reloc_entry->howto, |
| 651 | input_section, |
| 652 | data, reloc_entry->address, |
| 653 | (symbol->value |
| 654 | + symbol->section->output_section->vma |
| 655 | + symbol->section->output_offset), |
| 656 | reloc_entry->addend); |
| 657 | } |
| 658 | |
| 659 | static bfd_reloc_status_type |
| 660 | pru_elf32_ldi32_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
| 661 | void *data, asection *input_section, |
| 662 | bfd *output_bfd, |
| 663 | char **error_message) |
| 664 | { |
| 665 | /* If this is a relocatable link (output_bfd test tells us), just |
| 666 | call the generic function. Any adjustment will be done at final |
| 667 | link time. */ |
| 668 | if (output_bfd != NULL) |
| 669 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 670 | input_section, output_bfd, error_message); |
| 671 | |
| 672 | return pru_elf32_do_ldi32_relocate (abfd, reloc_entry->howto, |
| 673 | input_section, |
| 674 | data, reloc_entry->address, |
| 675 | (symbol->value |
| 676 | + symbol->section->output_section->vma |
| 677 | + symbol->section->output_offset), |
| 678 | reloc_entry->addend); |
| 679 | } |
| 680 | |
| 681 | |
| 682 | /* Implement elf_backend_relocate_section. */ |
| 683 | static bfd_boolean |
| 684 | pru_elf32_relocate_section (bfd *output_bfd, |
| 685 | struct bfd_link_info *info, |
| 686 | bfd *input_bfd, |
| 687 | asection *input_section, |
| 688 | bfd_byte *contents, |
| 689 | Elf_Internal_Rela *relocs, |
| 690 | Elf_Internal_Sym *local_syms, |
| 691 | asection **local_sections) |
| 692 | { |
| 693 | struct bfd_elf_section_data * esd = elf_section_data (input_section); |
| 694 | Elf_Internal_Shdr *symtab_hdr; |
| 695 | struct elf_link_hash_entry **sym_hashes; |
| 696 | Elf_Internal_Rela *rel; |
| 697 | Elf_Internal_Rela *relend; |
| 698 | bfd_boolean is_rel_reloc; |
| 699 | |
| 700 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 701 | sym_hashes = elf_sym_hashes (input_bfd); |
| 702 | relend = relocs + input_section->reloc_count; |
| 703 | |
| 704 | /* See if we have a REL type relocation. */ |
| 705 | is_rel_reloc = (esd->rel.hdr != NULL); |
| 706 | /* Sanity check - only one type of relocation per section. |
| 707 | FIXME: Theoretically it is possible to have both types, |
| 708 | but if that happens how can we distinguish between the two ? */ |
| 709 | BFD_ASSERT (! is_rel_reloc || ! esd->rela.hdr); |
| 710 | |
| 711 | for (rel = relocs; rel < relend; rel++) |
| 712 | { |
| 713 | reloc_howto_type *howto; |
| 714 | unsigned long r_symndx; |
| 715 | Elf_Internal_Sym *sym; |
| 716 | asection *sec; |
| 717 | struct elf_link_hash_entry *h; |
| 718 | bfd_vma relocation; |
| 719 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 720 | const char *name = NULL; |
| 721 | const char* msg = (const char*) NULL; |
| 722 | bfd_boolean unresolved_reloc; |
| 723 | bfd_vma addend; |
| 724 | |
| 725 | /* If we are using a REL relocation then the addend should be empty. */ |
| 726 | BFD_ASSERT (! is_rel_reloc || rel->r_addend == 0); |
| 727 | |
| 728 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 729 | |
| 730 | howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info)); |
| 731 | h = NULL; |
| 732 | sym = NULL; |
| 733 | sec = NULL; |
| 734 | |
| 735 | if (r_symndx < symtab_hdr->sh_info) |
| 736 | { |
| 737 | sym = local_syms + r_symndx; |
| 738 | sec = local_sections[r_symndx]; |
| 739 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 740 | } |
| 741 | else |
| 742 | { |
| 743 | bfd_boolean warned, ignored; |
| 744 | |
| 745 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 746 | r_symndx, symtab_hdr, sym_hashes, |
| 747 | h, sec, relocation, |
| 748 | unresolved_reloc, warned, ignored); |
| 749 | } |
| 750 | |
| 751 | if (sec && discarded_section (sec)) |
| 752 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 753 | rel, 1, relend, howto, 0, contents); |
| 754 | |
| 755 | /* Nothing more to do unless this is a final link. */ |
| 756 | if (bfd_link_relocatable (info)) |
| 757 | continue; |
| 758 | |
| 759 | if (howto) |
| 760 | { |
| 761 | switch (howto->type) |
| 762 | { |
| 763 | case R_PRU_NONE: |
| 764 | /* We don't need to find a value for this symbol. It's just a |
| 765 | marker. */ |
| 766 | r = bfd_reloc_ok; |
| 767 | break; |
| 768 | |
| 769 | case R_PRU_U16: |
| 770 | if (is_rel_reloc) |
| 771 | { |
| 772 | unsigned long insn; |
| 773 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 774 | addend = GET_INSN_FIELD (IMM16, insn); |
| 775 | } |
| 776 | else |
| 777 | addend = rel->r_addend; |
| 778 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 779 | input_section, contents, |
| 780 | rel->r_offset, relocation, |
| 781 | addend); |
| 782 | break; |
| 783 | |
| 784 | case R_PRU_U16_PMEMIMM: |
| 785 | case R_PRU_32_PMEM: |
| 786 | case R_PRU_16_PMEM: |
| 787 | if (is_rel_reloc && howto->type == R_PRU_U16_PMEMIMM) |
| 788 | { |
| 789 | unsigned long insn; |
| 790 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 791 | addend = GET_INSN_FIELD (IMM16, insn) << 2; |
| 792 | } |
| 793 | else if (is_rel_reloc && howto->type == R_PRU_32_PMEM) |
| 794 | { |
| 795 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 796 | addend <<= 2; |
| 797 | } |
| 798 | else if (is_rel_reloc && howto->type == R_PRU_16_PMEM) |
| 799 | { |
| 800 | addend = bfd_get_16 (input_bfd, contents + rel->r_offset); |
| 801 | addend <<= 2; |
| 802 | } |
| 803 | else |
| 804 | { |
| 805 | BFD_ASSERT (!is_rel_reloc); |
| 806 | addend = rel->r_addend; |
| 807 | } |
| 808 | r = pru_elf32_do_pmem_relocate (input_bfd, howto, |
| 809 | input_section, |
| 810 | contents, rel->r_offset, |
| 811 | relocation, addend); |
| 812 | break; |
| 813 | case R_PRU_S10_PCREL: |
| 814 | BFD_ASSERT (! is_rel_reloc); |
| 815 | r = pru_elf32_do_s10_pcrel_relocate (input_bfd, howto, |
| 816 | input_section, |
| 817 | contents, |
| 818 | rel->r_offset, |
| 819 | relocation, |
| 820 | rel->r_addend); |
| 821 | break; |
| 822 | case R_PRU_U8_PCREL: |
| 823 | BFD_ASSERT (! is_rel_reloc); |
| 824 | r = pru_elf32_do_u8_pcrel_relocate (input_bfd, howto, |
| 825 | input_section, |
| 826 | contents, |
| 827 | rel->r_offset, |
| 828 | relocation, |
| 829 | rel->r_addend); |
| 830 | break; |
| 831 | case R_PRU_LDI32: |
| 832 | if (is_rel_reloc) |
| 833 | { |
| 834 | unsigned long in1, in2; |
| 835 | in1 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 836 | in2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 837 | addend = (GET_INSN_FIELD (IMM16, in1) << 16) |
| 838 | | GET_INSN_FIELD (IMM16, in2); |
| 839 | } |
| 840 | else |
| 841 | { |
| 842 | addend = rel->r_addend; |
| 843 | } |
| 844 | r = pru_elf32_do_ldi32_relocate (input_bfd, howto, |
| 845 | input_section, |
| 846 | contents, |
| 847 | rel->r_offset, |
| 848 | relocation, |
| 849 | addend); |
| 850 | break; |
| 851 | case R_PRU_GNU_DIFF8: |
| 852 | case R_PRU_GNU_DIFF16: |
| 853 | case R_PRU_GNU_DIFF32: |
| 854 | case R_PRU_GNU_DIFF16_PMEM: |
| 855 | case R_PRU_GNU_DIFF32_PMEM: |
| 856 | /* GNU extensions support only rela. */ |
| 857 | BFD_ASSERT (! is_rel_reloc); |
| 858 | /* Nothing to do here, as contents already contain the |
| 859 | diff value. */ |
| 860 | r = bfd_reloc_ok; |
| 861 | break; |
| 862 | |
| 863 | case R_PRU_BFD_RELOC_16: |
| 864 | if (is_rel_reloc) |
| 865 | addend = bfd_get_16 (input_bfd, contents + rel->r_offset); |
| 866 | else |
| 867 | addend = rel->r_addend; |
| 868 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 869 | input_section, contents, |
| 870 | rel->r_offset, relocation, |
| 871 | addend); |
| 872 | break; |
| 873 | |
| 874 | case R_PRU_BFD_RELOC_32: |
| 875 | if (is_rel_reloc) |
| 876 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 877 | else |
| 878 | addend = rel->r_addend; |
| 879 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 880 | input_section, contents, |
| 881 | rel->r_offset, relocation, |
| 882 | addend); |
| 883 | break; |
| 884 | |
| 885 | case R_PRU_GNU_BFD_RELOC_8: |
| 886 | BFD_ASSERT (! is_rel_reloc); |
| 887 | r = _bfd_final_link_relocate (howto, input_bfd, |
| 888 | input_section, contents, |
| 889 | rel->r_offset, relocation, |
| 890 | rel->r_addend); |
| 891 | break; |
| 892 | |
| 893 | default: |
| 894 | BFD_ASSERT (0); |
| 895 | break; |
| 896 | } |
| 897 | } |
| 898 | else |
| 899 | r = bfd_reloc_notsupported; |
| 900 | |
| 901 | if (r != bfd_reloc_ok) |
| 902 | { |
| 903 | if (h != NULL) |
| 904 | name = h->root.root.string; |
| 905 | else |
| 906 | { |
| 907 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 908 | symtab_hdr->sh_link, |
| 909 | sym->st_name); |
| 910 | if (name == NULL || *name == '\0') |
| 911 | name = bfd_section_name (sec); |
| 912 | } |
| 913 | |
| 914 | switch (r) |
| 915 | { |
| 916 | case bfd_reloc_overflow: |
| 917 | (*info->callbacks->reloc_overflow) (info, NULL, name, |
| 918 | howto->name, (bfd_vma) 0, |
| 919 | input_bfd, input_section, |
| 920 | rel->r_offset); |
| 921 | break; |
| 922 | |
| 923 | case bfd_reloc_undefined: |
| 924 | (*info->callbacks->undefined_symbol) (info, name, input_bfd, |
| 925 | input_section, |
| 926 | rel->r_offset, TRUE); |
| 927 | break; |
| 928 | |
| 929 | case bfd_reloc_outofrange: |
| 930 | if (msg == NULL) |
| 931 | msg = _("relocation out of range"); |
| 932 | break; |
| 933 | |
| 934 | case bfd_reloc_notsupported: |
| 935 | if (msg == NULL) |
| 936 | msg = _("unsupported relocation"); |
| 937 | break; |
| 938 | |
| 939 | case bfd_reloc_dangerous: |
| 940 | if (msg == NULL) |
| 941 | msg = _("dangerous relocation"); |
| 942 | break; |
| 943 | |
| 944 | default: |
| 945 | if (msg == NULL) |
| 946 | msg = _("unknown error"); |
| 947 | break; |
| 948 | } |
| 949 | |
| 950 | if (msg) |
| 951 | { |
| 952 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
| 953 | input_section, rel->r_offset); |
| 954 | return FALSE; |
| 955 | } |
| 956 | } |
| 957 | } |
| 958 | return TRUE; |
| 959 | } |
| 960 | |
| 961 | \f |
| 962 | /* Perform a diff relocation. Nothing to do, as the difference value is |
| 963 | already written into the section's contents. */ |
| 964 | |
| 965 | static bfd_reloc_status_type |
| 966 | bfd_elf_pru_diff_relocate (bfd *abfd ATTRIBUTE_UNUSED, |
| 967 | arelent *reloc_entry ATTRIBUTE_UNUSED, |
| 968 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 969 | void *data ATTRIBUTE_UNUSED, |
| 970 | asection *input_section ATTRIBUTE_UNUSED, |
| 971 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 972 | char **error_message ATTRIBUTE_UNUSED) |
| 973 | { |
| 974 | return bfd_reloc_ok; |
| 975 | } |
| 976 | |
| 977 | |
| 978 | /* Returns whether the relocation type passed is a diff reloc. */ |
| 979 | |
| 980 | static bfd_boolean |
| 981 | elf32_pru_is_diff_reloc (Elf_Internal_Rela *irel) |
| 982 | { |
| 983 | return (ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF8 |
| 984 | || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF16 |
| 985 | || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF32 |
| 986 | || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF16_PMEM |
| 987 | || ELF32_R_TYPE (irel->r_info) == R_PRU_GNU_DIFF32_PMEM); |
| 988 | } |
| 989 | |
| 990 | /* Reduce the diff value written in the section by count if the shrinked |
| 991 | insn address happens to fall between the two symbols for which this |
| 992 | diff reloc was emitted. */ |
| 993 | |
| 994 | static void |
| 995 | elf32_pru_adjust_diff_reloc_value (bfd *abfd, |
| 996 | struct bfd_section *isec, |
| 997 | Elf_Internal_Rela *irel, |
| 998 | bfd_vma symval, |
| 999 | bfd_vma shrinked_insn_address, |
| 1000 | int count) |
| 1001 | { |
| 1002 | unsigned char *reloc_contents = NULL; |
| 1003 | unsigned char *isec_contents = elf_section_data (isec)->this_hdr.contents; |
| 1004 | if (isec_contents == NULL) |
| 1005 | { |
| 1006 | if (! bfd_malloc_and_get_section (abfd, isec, &isec_contents)) |
| 1007 | return; |
| 1008 | |
| 1009 | elf_section_data (isec)->this_hdr.contents = isec_contents; |
| 1010 | } |
| 1011 | |
| 1012 | reloc_contents = isec_contents + irel->r_offset; |
| 1013 | |
| 1014 | /* Read value written in object file. */ |
| 1015 | bfd_signed_vma x = 0; |
| 1016 | switch (ELF32_R_TYPE (irel->r_info)) |
| 1017 | { |
| 1018 | case R_PRU_GNU_DIFF8: |
| 1019 | { |
| 1020 | x = bfd_get_signed_8 (abfd, reloc_contents); |
| 1021 | break; |
| 1022 | } |
| 1023 | case R_PRU_GNU_DIFF16: |
| 1024 | { |
| 1025 | x = bfd_get_signed_16 (abfd, reloc_contents); |
| 1026 | break; |
| 1027 | } |
| 1028 | case R_PRU_GNU_DIFF32: |
| 1029 | { |
| 1030 | x = bfd_get_signed_32 (abfd, reloc_contents); |
| 1031 | break; |
| 1032 | } |
| 1033 | case R_PRU_GNU_DIFF16_PMEM: |
| 1034 | { |
| 1035 | x = bfd_get_signed_16 (abfd, reloc_contents) * 4; |
| 1036 | break; |
| 1037 | } |
| 1038 | case R_PRU_GNU_DIFF32_PMEM: |
| 1039 | { |
| 1040 | x = bfd_get_signed_32 (abfd, reloc_contents) * 4; |
| 1041 | break; |
| 1042 | } |
| 1043 | default: |
| 1044 | { |
| 1045 | BFD_FAIL (); |
| 1046 | } |
| 1047 | } |
| 1048 | |
| 1049 | /* For a diff reloc sym1 - sym2 the diff at assembly time (x) is written |
| 1050 | into the object file at the reloc offset. sym2's logical value is |
| 1051 | symval (<start_of_section>) + reloc addend. Compute the start and end |
| 1052 | addresses and check if the shrinked insn falls between sym1 and sym2. */ |
| 1053 | |
| 1054 | bfd_vma end_address = symval + irel->r_addend; |
| 1055 | bfd_vma start_address = end_address - x; |
| 1056 | |
| 1057 | /* Shrink the absolute DIFF value (get the to labels "closer" |
| 1058 | together), because we have removed data between labels. */ |
| 1059 | if (x < 0) |
| 1060 | { |
| 1061 | x += count; |
| 1062 | /* In case the signed x is negative, restore order. */ |
| 1063 | SWAP_VALS (end_address, start_address); |
| 1064 | } |
| 1065 | else |
| 1066 | { |
| 1067 | x -= count; |
| 1068 | } |
| 1069 | |
| 1070 | /* Reduce the diff value by count bytes and write it back into section |
| 1071 | contents. */ |
| 1072 | |
| 1073 | if (shrinked_insn_address >= start_address |
| 1074 | && shrinked_insn_address <= end_address) |
| 1075 | { |
| 1076 | switch (ELF32_R_TYPE (irel->r_info)) |
| 1077 | { |
| 1078 | case R_PRU_GNU_DIFF8: |
| 1079 | { |
| 1080 | bfd_put_signed_8 (abfd, x & 0xFF, reloc_contents); |
| 1081 | break; |
| 1082 | } |
| 1083 | case R_PRU_GNU_DIFF16: |
| 1084 | { |
| 1085 | bfd_put_signed_16 (abfd, x & 0xFFFF, reloc_contents); |
| 1086 | break; |
| 1087 | } |
| 1088 | case R_PRU_GNU_DIFF32: |
| 1089 | { |
| 1090 | bfd_put_signed_32 (abfd, x & 0xFFFFFFFF, reloc_contents); |
| 1091 | break; |
| 1092 | } |
| 1093 | case R_PRU_GNU_DIFF16_PMEM: |
| 1094 | { |
| 1095 | bfd_put_signed_16 (abfd, (x / 4) & 0xFFFF, reloc_contents); |
| 1096 | break; |
| 1097 | } |
| 1098 | case R_PRU_GNU_DIFF32_PMEM: |
| 1099 | { |
| 1100 | bfd_put_signed_32 (abfd, (x / 4) & 0xFFFFFFFF, reloc_contents); |
| 1101 | break; |
| 1102 | } |
| 1103 | default: |
| 1104 | { |
| 1105 | BFD_FAIL (); |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | } |
| 1110 | } |
| 1111 | |
| 1112 | /* Delete some bytes from a section while changing the size of an instruction. |
| 1113 | The parameter "addr" denotes the section-relative offset pointing just |
| 1114 | behind the shrinked instruction. "addr+count" point at the first |
| 1115 | byte just behind the original unshrinked instruction. |
| 1116 | |
| 1117 | Idea copied from the AVR port. */ |
| 1118 | |
| 1119 | static bfd_boolean |
| 1120 | pru_elf_relax_delete_bytes (bfd *abfd, |
| 1121 | asection *sec, |
| 1122 | bfd_vma addr, |
| 1123 | int count) |
| 1124 | { |
| 1125 | Elf_Internal_Shdr *symtab_hdr; |
| 1126 | unsigned int sec_shndx; |
| 1127 | bfd_byte *contents; |
| 1128 | Elf_Internal_Rela *irel, *irelend; |
| 1129 | Elf_Internal_Sym *isym; |
| 1130 | Elf_Internal_Sym *isymbuf = NULL; |
| 1131 | bfd_vma toaddr; |
| 1132 | struct elf_link_hash_entry **sym_hashes; |
| 1133 | struct elf_link_hash_entry **end_hashes; |
| 1134 | unsigned int symcount; |
| 1135 | |
| 1136 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1137 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1138 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1139 | |
| 1140 | toaddr = sec->size; |
| 1141 | |
| 1142 | irel = elf_section_data (sec)->relocs; |
| 1143 | irelend = irel + sec->reloc_count; |
| 1144 | |
| 1145 | /* Actually delete the bytes. */ |
| 1146 | if (toaddr - addr - count > 0) |
| 1147 | memmove (contents + addr, contents + addr + count, |
| 1148 | (size_t) (toaddr - addr - count)); |
| 1149 | sec->size -= count; |
| 1150 | |
| 1151 | /* Adjust all the reloc addresses. */ |
| 1152 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 1153 | { |
| 1154 | bfd_vma old_reloc_address; |
| 1155 | |
| 1156 | old_reloc_address = (sec->output_section->vma |
| 1157 | + sec->output_offset + irel->r_offset); |
| 1158 | |
| 1159 | /* Get the new reloc address. */ |
| 1160 | if ((irel->r_offset > addr |
| 1161 | && irel->r_offset < toaddr)) |
| 1162 | { |
| 1163 | if (debug_relax) |
| 1164 | printf ("Relocation at address 0x%x needs to be moved.\n" |
| 1165 | "Old section offset: 0x%x, New section offset: 0x%x \n", |
| 1166 | (unsigned int) old_reloc_address, |
| 1167 | (unsigned int) irel->r_offset, |
| 1168 | (unsigned int) ((irel->r_offset) - count)); |
| 1169 | |
| 1170 | irel->r_offset -= count; |
| 1171 | } |
| 1172 | |
| 1173 | } |
| 1174 | |
| 1175 | /* The reloc's own addresses are now ok. However, we need to readjust |
| 1176 | the reloc's addend, i.e. the reloc's value if two conditions are met: |
| 1177 | 1.) the reloc is relative to a symbol in this section that |
| 1178 | is located in front of the shrinked instruction |
| 1179 | 2.) symbol plus addend end up behind the shrinked instruction. |
| 1180 | |
| 1181 | The most common case where this happens are relocs relative to |
| 1182 | the section-start symbol. |
| 1183 | |
| 1184 | This step needs to be done for all of the sections of the bfd. */ |
| 1185 | |
| 1186 | { |
| 1187 | struct bfd_section *isec; |
| 1188 | |
| 1189 | for (isec = abfd->sections; isec; isec = isec->next) |
| 1190 | { |
| 1191 | bfd_vma symval; |
| 1192 | bfd_vma shrinked_insn_address; |
| 1193 | |
| 1194 | if (isec->reloc_count == 0) |
| 1195 | continue; |
| 1196 | |
| 1197 | shrinked_insn_address = (sec->output_section->vma |
| 1198 | + sec->output_offset + addr); |
| 1199 | |
| 1200 | irel = elf_section_data (isec)->relocs; |
| 1201 | /* PR 12161: Read in the relocs for this section if necessary. */ |
| 1202 | if (irel == NULL) |
| 1203 | irel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, TRUE); |
| 1204 | |
| 1205 | for (irelend = irel + isec->reloc_count; |
| 1206 | irel < irelend; |
| 1207 | irel++) |
| 1208 | { |
| 1209 | /* Read this BFD's local symbols if we haven't done |
| 1210 | so already. */ |
| 1211 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 1212 | { |
| 1213 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1214 | if (isymbuf == NULL) |
| 1215 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 1216 | symtab_hdr->sh_info, 0, |
| 1217 | NULL, NULL, NULL); |
| 1218 | if (isymbuf == NULL) |
| 1219 | return FALSE; |
| 1220 | } |
| 1221 | |
| 1222 | /* Get the value of the symbol referred to by the reloc. */ |
| 1223 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1224 | { |
| 1225 | /* A local symbol. */ |
| 1226 | asection *sym_sec; |
| 1227 | |
| 1228 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 1229 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1230 | symval = isym->st_value; |
| 1231 | /* If the reloc is absolute, it will not have |
| 1232 | a symbol or section associated with it. */ |
| 1233 | if (sym_sec == sec) |
| 1234 | { |
| 1235 | symval += sym_sec->output_section->vma |
| 1236 | + sym_sec->output_offset; |
| 1237 | |
| 1238 | if (debug_relax) |
| 1239 | printf ("Checking if the relocation's " |
| 1240 | "addend needs corrections.\n" |
| 1241 | "Address of anchor symbol: 0x%x \n" |
| 1242 | "Address of relocation target: 0x%x \n" |
| 1243 | "Address of relaxed insn: 0x%x \n", |
| 1244 | (unsigned int) symval, |
| 1245 | (unsigned int) (symval + irel->r_addend), |
| 1246 | (unsigned int) shrinked_insn_address); |
| 1247 | |
| 1248 | /* Shrink the special DIFF relocations. */ |
| 1249 | if (elf32_pru_is_diff_reloc (irel)) |
| 1250 | { |
| 1251 | elf32_pru_adjust_diff_reloc_value (abfd, isec, irel, |
| 1252 | symval, |
| 1253 | shrinked_insn_address, |
| 1254 | count); |
| 1255 | } |
| 1256 | |
| 1257 | /* Fix the addend, if it is affected. */ |
| 1258 | if (symval <= shrinked_insn_address |
| 1259 | && (symval + irel->r_addend) > shrinked_insn_address) |
| 1260 | { |
| 1261 | |
| 1262 | irel->r_addend -= count; |
| 1263 | |
| 1264 | if (debug_relax) |
| 1265 | printf ("Relocation's addend needed to be fixed \n"); |
| 1266 | } |
| 1267 | } |
| 1268 | /* else...Reference symbol is absolute. |
| 1269 | No adjustment needed. */ |
| 1270 | } |
| 1271 | /* else...Reference symbol is extern. No need for adjusting |
| 1272 | the addend. */ |
| 1273 | } |
| 1274 | } |
| 1275 | } |
| 1276 | |
| 1277 | /* Adjust the local symbols defined in this section. */ |
| 1278 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1279 | /* Fix PR 9841, there may be no local symbols. */ |
| 1280 | if (isym != NULL) |
| 1281 | { |
| 1282 | Elf_Internal_Sym *isymend; |
| 1283 | |
| 1284 | isymend = isym + symtab_hdr->sh_info; |
| 1285 | for (; isym < isymend; isym++) |
| 1286 | { |
| 1287 | if (isym->st_shndx == sec_shndx) |
| 1288 | { |
| 1289 | if (isym->st_value > addr |
| 1290 | && isym->st_value <= toaddr) |
| 1291 | isym->st_value -= count; |
| 1292 | |
| 1293 | if (isym->st_value <= addr |
| 1294 | && isym->st_value + isym->st_size > addr) |
| 1295 | { |
| 1296 | /* If this assert fires then we have a symbol that ends |
| 1297 | part way through an instruction. Does that make |
| 1298 | sense? */ |
| 1299 | BFD_ASSERT (isym->st_value + isym->st_size >= addr + count); |
| 1300 | isym->st_size -= count; |
| 1301 | } |
| 1302 | } |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | /* Now adjust the global symbols defined in this section. */ |
| 1307 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1308 | - symtab_hdr->sh_info); |
| 1309 | sym_hashes = elf_sym_hashes (abfd); |
| 1310 | end_hashes = sym_hashes + symcount; |
| 1311 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 1312 | { |
| 1313 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1314 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 1315 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1316 | && sym_hash->root.u.def.section == sec) |
| 1317 | { |
| 1318 | if (sym_hash->root.u.def.value > addr |
| 1319 | && sym_hash->root.u.def.value <= toaddr) |
| 1320 | sym_hash->root.u.def.value -= count; |
| 1321 | |
| 1322 | if (sym_hash->root.u.def.value <= addr |
| 1323 | && (sym_hash->root.u.def.value + sym_hash->size > addr)) |
| 1324 | { |
| 1325 | /* If this assert fires then we have a symbol that ends |
| 1326 | part way through an instruction. Does that make |
| 1327 | sense? */ |
| 1328 | BFD_ASSERT (sym_hash->root.u.def.value + sym_hash->size |
| 1329 | >= addr + count); |
| 1330 | sym_hash->size -= count; |
| 1331 | } |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | return TRUE; |
| 1336 | } |
| 1337 | |
| 1338 | static bfd_boolean |
| 1339 | pru_elf32_relax_section (bfd * abfd, asection * sec, |
| 1340 | struct bfd_link_info * link_info, |
| 1341 | bfd_boolean * again) |
| 1342 | { |
| 1343 | Elf_Internal_Shdr * symtab_hdr; |
| 1344 | Elf_Internal_Rela * internal_relocs; |
| 1345 | Elf_Internal_Rela * irel; |
| 1346 | Elf_Internal_Rela * irelend; |
| 1347 | bfd_byte * contents = NULL; |
| 1348 | Elf_Internal_Sym * isymbuf = NULL; |
| 1349 | |
| 1350 | /* Assume nothing changes. */ |
| 1351 | *again = FALSE; |
| 1352 | |
| 1353 | /* We don't have to do anything for a relocatable link, if |
| 1354 | this section does not have relocs, or if this is not a |
| 1355 | code section. */ |
| 1356 | if (bfd_link_relocatable (link_info) |
| 1357 | || (sec->flags & SEC_RELOC) == 0 |
| 1358 | || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0) |
| 1359 | return TRUE; |
| 1360 | |
| 1361 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 1362 | |
| 1363 | /* Get a copy of the native relocations. */ |
| 1364 | internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
| 1365 | link_info->keep_memory); |
| 1366 | if (internal_relocs == NULL) |
| 1367 | goto error_return; |
| 1368 | |
| 1369 | /* Walk through them looking for relaxing opportunities. */ |
| 1370 | irelend = internal_relocs + sec->reloc_count; |
| 1371 | |
| 1372 | for (irel = internal_relocs; irel < irelend; irel++) |
| 1373 | { |
| 1374 | bfd_vma symval; |
| 1375 | |
| 1376 | /* Get the section contents if we haven't done so already. */ |
| 1377 | if (contents == NULL) |
| 1378 | { |
| 1379 | /* Get cached copy if it exists. */ |
| 1380 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 1381 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1382 | else if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 1383 | goto error_return; |
| 1384 | } |
| 1385 | |
| 1386 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 1387 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 1388 | { |
| 1389 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1390 | if (isymbuf == NULL) |
| 1391 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 1392 | symtab_hdr->sh_info, 0, |
| 1393 | NULL, NULL, NULL); |
| 1394 | if (isymbuf == NULL) |
| 1395 | goto error_return; |
| 1396 | } |
| 1397 | |
| 1398 | /* Get the value of the symbol referred to by the reloc. */ |
| 1399 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1400 | { |
| 1401 | /* A local symbol. */ |
| 1402 | Elf_Internal_Sym *isym; |
| 1403 | asection *sym_sec; |
| 1404 | |
| 1405 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 1406 | if (isym->st_shndx == SHN_UNDEF) |
| 1407 | sym_sec = bfd_und_section_ptr; |
| 1408 | else if (isym->st_shndx == SHN_ABS) |
| 1409 | sym_sec = bfd_abs_section_ptr; |
| 1410 | else if (isym->st_shndx == SHN_COMMON) |
| 1411 | sym_sec = bfd_com_section_ptr; |
| 1412 | else |
| 1413 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1414 | symval = (isym->st_value |
| 1415 | + sym_sec->output_section->vma + sym_sec->output_offset); |
| 1416 | } |
| 1417 | else |
| 1418 | { |
| 1419 | unsigned long indx; |
| 1420 | struct elf_link_hash_entry *h; |
| 1421 | |
| 1422 | /* An external symbol. */ |
| 1423 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 1424 | h = elf_sym_hashes (abfd)[indx]; |
| 1425 | BFD_ASSERT (h != NULL); |
| 1426 | |
| 1427 | if (h->root.type != bfd_link_hash_defined |
| 1428 | && h->root.type != bfd_link_hash_defweak) |
| 1429 | /* This appears to be a reference to an undefined |
| 1430 | symbol. Just ignore it--it will be caught by the |
| 1431 | regular reloc processing. */ |
| 1432 | continue; |
| 1433 | |
| 1434 | symval = (h->root.u.def.value |
| 1435 | + h->root.u.def.section->output_section->vma |
| 1436 | + h->root.u.def.section->output_offset); |
| 1437 | } |
| 1438 | |
| 1439 | /* For simplicity of coding, we are going to modify the section |
| 1440 | contents, the section relocs, and the BFD symbol table. We |
| 1441 | must tell the rest of the code not to free up this |
| 1442 | information. It would be possible to instead create a table |
| 1443 | of changes which have to be made, as is done in coff-mips.c; |
| 1444 | that would be more work, but would require less memory when |
| 1445 | the linker is run. */ |
| 1446 | |
| 1447 | /* Check if we can remove an LDI instruction from the LDI32 |
| 1448 | pseudo instruction if the upper 16 operand bits are zero. */ |
| 1449 | if (ELF32_R_TYPE (irel->r_info) == (int) R_PRU_LDI32) |
| 1450 | { |
| 1451 | bfd_vma value = symval + irel->r_addend; |
| 1452 | |
| 1453 | if (debug_relax) |
| 1454 | printf ("R_PRU_LDI32 with value=0x%lx\n", (long) value); |
| 1455 | |
| 1456 | if ((long) value >> 16 == 0) |
| 1457 | { |
| 1458 | unsigned long insn; |
| 1459 | |
| 1460 | /* Note that we've changed the relocs, section contents. */ |
| 1461 | elf_section_data (sec)->relocs = internal_relocs; |
| 1462 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1463 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1464 | |
| 1465 | /* Make the second instruction load the 16-bit constant |
| 1466 | into the full 32-bit register. */ |
| 1467 | insn = bfd_get_32 (abfd, contents + irel->r_offset + 4); |
| 1468 | |
| 1469 | /* Old GAS and LD versions have a bug, where the two |
| 1470 | LDI instructions are swapped. Detect such object |
| 1471 | files and bail. */ |
| 1472 | if (GET_INSN_FIELD (RDSEL, insn) != RSEL_15_0) |
| 1473 | { |
| 1474 | /* xgettext:c-format */ |
| 1475 | _bfd_error_handler (_("error: %pB: old incompatible object file detected"), |
| 1476 | abfd); |
| 1477 | goto error_return; |
| 1478 | } |
| 1479 | |
| 1480 | SET_INSN_FIELD (RDSEL, insn, RSEL_31_0); |
| 1481 | bfd_put_32 (abfd, insn, contents + irel->r_offset + 4); |
| 1482 | |
| 1483 | /* Delete the first LDI instruction. Note that there should |
| 1484 | be no relocations or symbols pointing to the second LDI |
| 1485 | instruction. */ |
| 1486 | if (!pru_elf_relax_delete_bytes (abfd, sec, irel->r_offset, 4)) |
| 1487 | goto error_return; |
| 1488 | |
| 1489 | /* We're done with deletion of the first instruction. |
| 1490 | Set a regular LDI relocation for the second instruction |
| 1491 | we left to load the 16-bit value into the 32-bit |
| 1492 | register. */ |
| 1493 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1494 | R_PRU_U16); |
| 1495 | |
| 1496 | /* That will change things, so, we should relax again. |
| 1497 | Note that this is not required, and it may be slow. */ |
| 1498 | *again = TRUE; |
| 1499 | } |
| 1500 | } |
| 1501 | } |
| 1502 | |
| 1503 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1504 | { |
| 1505 | if (!link_info->keep_memory) |
| 1506 | free (isymbuf); |
| 1507 | else |
| 1508 | { |
| 1509 | /* Cache the symbols for elf_link_input_bfd. */ |
| 1510 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1511 | } |
| 1512 | } |
| 1513 | |
| 1514 | if (contents != NULL |
| 1515 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 1516 | { |
| 1517 | if (!link_info->keep_memory) |
| 1518 | free (contents); |
| 1519 | else |
| 1520 | { |
| 1521 | /* Cache the section contents for elf_link_input_bfd. */ |
| 1522 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | if (internal_relocs != NULL |
| 1527 | && elf_section_data (sec)->relocs != internal_relocs) |
| 1528 | free (internal_relocs); |
| 1529 | |
| 1530 | return TRUE; |
| 1531 | |
| 1532 | error_return: |
| 1533 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1534 | free (isymbuf); |
| 1535 | if (contents != NULL |
| 1536 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 1537 | free (contents); |
| 1538 | if (internal_relocs != NULL |
| 1539 | && elf_section_data (sec)->relocs != internal_relocs) |
| 1540 | free (internal_relocs); |
| 1541 | |
| 1542 | return FALSE; |
| 1543 | } |
| 1544 | |
| 1545 | /* Free the derived linker hash table. */ |
| 1546 | static void |
| 1547 | pru_elf32_link_hash_table_free (bfd *obfd) |
| 1548 | { |
| 1549 | _bfd_elf_link_hash_table_free (obfd); |
| 1550 | } |
| 1551 | |
| 1552 | /* Implement bfd_elf32_bfd_link_hash_table_create. */ |
| 1553 | static struct bfd_link_hash_table * |
| 1554 | pru_elf32_link_hash_table_create (bfd *abfd) |
| 1555 | { |
| 1556 | struct elf_link_hash_table *ret; |
| 1557 | size_t amt = sizeof (struct elf_link_hash_table); |
| 1558 | |
| 1559 | ret = bfd_zmalloc (amt); |
| 1560 | if (ret == NULL) |
| 1561 | return NULL; |
| 1562 | |
| 1563 | if (!_bfd_elf_link_hash_table_init (ret, abfd, |
| 1564 | link_hash_newfunc, |
| 1565 | sizeof (struct |
| 1566 | elf_link_hash_entry), |
| 1567 | PRU_ELF_DATA)) |
| 1568 | { |
| 1569 | free (ret); |
| 1570 | return NULL; |
| 1571 | } |
| 1572 | |
| 1573 | ret->root.hash_table_free = pru_elf32_link_hash_table_free; |
| 1574 | |
| 1575 | return &ret->root; |
| 1576 | } |
| 1577 | |
| 1578 | #define ELF_ARCH bfd_arch_pru |
| 1579 | #define ELF_TARGET_ID PRU_ELF_DATA |
| 1580 | #define ELF_MACHINE_CODE EM_TI_PRU |
| 1581 | |
| 1582 | #define ELF_MAXPAGESIZE 1 |
| 1583 | |
| 1584 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 1585 | pru_elf32_link_hash_table_create |
| 1586 | |
| 1587 | /* Relocation table lookup macros. */ |
| 1588 | |
| 1589 | #define bfd_elf32_bfd_reloc_type_lookup pru_elf32_bfd_reloc_type_lookup |
| 1590 | #define bfd_elf32_bfd_reloc_name_lookup pru_elf32_bfd_reloc_name_lookup |
| 1591 | |
| 1592 | #define elf_info_to_howto pru_elf32_info_to_howto |
| 1593 | #define elf_info_to_howto_rel NULL |
| 1594 | |
| 1595 | /* elf backend functions. */ |
| 1596 | |
| 1597 | /* TI folks like to use a mix of REL and RELA relocations. See also |
| 1598 | the MSP430 and TI C6X backends. */ |
| 1599 | #define elf_backend_may_use_rel_p 1 |
| 1600 | #define elf_backend_may_use_rela_p 1 |
| 1601 | #define elf_backend_default_use_rela_p 1 |
| 1602 | |
| 1603 | #define elf_backend_rela_normal 1 |
| 1604 | |
| 1605 | #define elf_backend_relocate_section pru_elf32_relocate_section |
| 1606 | #define bfd_elf32_bfd_relax_section pru_elf32_relax_section |
| 1607 | |
| 1608 | #define TARGET_LITTLE_SYM pru_elf32_vec |
| 1609 | #define TARGET_LITTLE_NAME "elf32-pru" |
| 1610 | |
| 1611 | #include "elf32-target.h" |