| 1 | /* M16C/M32C specific support for 32-bit ELF. |
| 2 | Copyright (C) 2005 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "elf-bfd.h" |
| 25 | #include "elf/m32c.h" |
| 26 | #include "libiberty.h" |
| 27 | |
| 28 | /* Forward declarations. */ |
| 29 | static reloc_howto_type * m32c_reloc_type_lookup |
| 30 | (bfd *, bfd_reloc_code_real_type); |
| 31 | static void m32c_info_to_howto_rela |
| 32 | (bfd *, arelent *, Elf_Internal_Rela *); |
| 33 | static bfd_boolean m32c_elf_relocate_section |
| 34 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); |
| 35 | static bfd_boolean m32c_elf_gc_sweep_hook |
| 36 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
| 37 | static asection * m32c_elf_gc_mark_hook |
| 38 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *); |
| 39 | static bfd_boolean m32c_elf_check_relocs |
| 40 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
| 41 | static bfd_boolean m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int); |
| 42 | #ifdef DEBUG |
| 43 | static char * m32c_get_reloc (long reloc); |
| 44 | #endif |
| 45 | static bfd_boolean m32c_elf_relax_section |
| 46 | (bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again); |
| 47 | |
| 48 | |
| 49 | static reloc_howto_type m32c_elf_howto_table [] = |
| 50 | { |
| 51 | /* This reloc does nothing. */ |
| 52 | HOWTO (R_M32C_NONE, /* type */ |
| 53 | 0, /* rightshift */ |
| 54 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 55 | 32, /* bitsize */ |
| 56 | FALSE, /* pc_relative */ |
| 57 | 0, /* bitpos */ |
| 58 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 59 | bfd_elf_generic_reloc, /* special_function */ |
| 60 | "R_M32C_NONE", /* name */ |
| 61 | FALSE, /* partial_inplace */ |
| 62 | 0, /* src_mask */ |
| 63 | 0, /* dst_mask */ |
| 64 | FALSE), /* pcrel_offset */ |
| 65 | |
| 66 | HOWTO (R_M32C_16, /* type */ |
| 67 | 0, /* rightshift */ |
| 68 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 69 | 16, /* bitsize */ |
| 70 | FALSE, /* pc_relative */ |
| 71 | 0, /* bitpos */ |
| 72 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 73 | bfd_elf_generic_reloc, /* special_function */ |
| 74 | "R_M32C_16", /* name */ |
| 75 | FALSE, /* partial_inplace */ |
| 76 | 0, /* src_mask */ |
| 77 | 0x0000ffff, /* dst_mask */ |
| 78 | FALSE), /* pcrel_offset */ |
| 79 | |
| 80 | HOWTO (R_M32C_24, /* type */ |
| 81 | 0, /* rightshift */ |
| 82 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 83 | 24, /* bitsize */ |
| 84 | FALSE, /* pc_relative */ |
| 85 | 0, /* bitpos */ |
| 86 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 87 | bfd_elf_generic_reloc, /* special_function */ |
| 88 | "R_M32C_24", /* name */ |
| 89 | FALSE, /* partial_inplace */ |
| 90 | 0, /* src_mask */ |
| 91 | 0x00ffffff, /* dst_mask */ |
| 92 | FALSE), /* pcrel_offset */ |
| 93 | |
| 94 | HOWTO (R_M32C_32, /* type */ |
| 95 | 0, /* rightshift */ |
| 96 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 97 | 32, /* bitsize */ |
| 98 | FALSE, /* pc_relative */ |
| 99 | 0, /* bitpos */ |
| 100 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 101 | bfd_elf_generic_reloc, /* special_function */ |
| 102 | "R_M32C_32", /* name */ |
| 103 | FALSE, /* partial_inplace */ |
| 104 | 0, /* src_mask */ |
| 105 | 0xffffffff, /* dst_mask */ |
| 106 | FALSE), /* pcrel_offset */ |
| 107 | |
| 108 | HOWTO (R_M32C_8_PCREL, /* type */ |
| 109 | 0, /* rightshift */ |
| 110 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 111 | 8, /* bitsize */ |
| 112 | TRUE, /* pc_relative */ |
| 113 | 0, /* bitpos */ |
| 114 | complain_overflow_signed, /* complain_on_overflow */ |
| 115 | bfd_elf_generic_reloc, /* special_function */ |
| 116 | "R_M32C_8_PCREL", /* name */ |
| 117 | FALSE, /* partial_inplace */ |
| 118 | 0, /* src_mask */ |
| 119 | 0x000000ff, /* dst_mask */ |
| 120 | TRUE), /* pcrel_offset */ |
| 121 | |
| 122 | HOWTO (R_M32C_16_PCREL, /* type */ |
| 123 | 0, /* rightshift */ |
| 124 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 125 | 16, /* bitsize */ |
| 126 | TRUE, /* pc_relative */ |
| 127 | 0, /* bitpos */ |
| 128 | complain_overflow_signed, /* complain_on_overflow */ |
| 129 | bfd_elf_generic_reloc, /* special_function */ |
| 130 | "R_M32C_16_PCREL", /* name */ |
| 131 | FALSE, /* partial_inplace */ |
| 132 | 0, /* src_mask */ |
| 133 | 0, /* dst_mask */ |
| 134 | TRUE), /* pcrel_offset */ |
| 135 | |
| 136 | HOWTO (R_M32C_8, /* type */ |
| 137 | 0, /* rightshift */ |
| 138 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 139 | 8, /* bitsize */ |
| 140 | FALSE, /* pc_relative */ |
| 141 | 0, /* bitpos */ |
| 142 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 143 | bfd_elf_generic_reloc, /* special_function */ |
| 144 | "R_M32C_8", /* name */ |
| 145 | FALSE, /* partial_inplace */ |
| 146 | 0, /* src_mask */ |
| 147 | 0x000000ff, /* dst_mask */ |
| 148 | FALSE), /* pcrel_offset */ |
| 149 | |
| 150 | HOWTO (R_M32C_LO16, /* type */ |
| 151 | 0, /* rightshift */ |
| 152 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 153 | 16, /* bitsize */ |
| 154 | FALSE, /* pc_relative */ |
| 155 | 0, /* bitpos */ |
| 156 | complain_overflow_dont, /* complain_on_overflow */ |
| 157 | bfd_elf_generic_reloc, /* special_function */ |
| 158 | "R_M32C_LO16", /* name */ |
| 159 | FALSE, /* partial_inplace */ |
| 160 | 0, /* src_mask */ |
| 161 | 0x0000ffff, /* dst_mask */ |
| 162 | FALSE), /* pcrel_offset */ |
| 163 | |
| 164 | HOWTO (R_M32C_HI8, /* type */ |
| 165 | 0, /* rightshift */ |
| 166 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 167 | 8, /* bitsize */ |
| 168 | FALSE, /* pc_relative */ |
| 169 | 0, /* bitpos */ |
| 170 | complain_overflow_dont, /* complain_on_overflow */ |
| 171 | bfd_elf_generic_reloc, /* special_function */ |
| 172 | "R_M32C_HI8", /* name */ |
| 173 | FALSE, /* partial_inplace */ |
| 174 | 0, /* src_mask */ |
| 175 | 0x000000ff, /* dst_mask */ |
| 176 | FALSE), /* pcrel_offset */ |
| 177 | |
| 178 | HOWTO (R_M32C_HI16, /* type */ |
| 179 | 0, /* rightshift */ |
| 180 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 181 | 16, /* bitsize */ |
| 182 | FALSE, /* pc_relative */ |
| 183 | 0, /* bitpos */ |
| 184 | complain_overflow_dont, /* complain_on_overflow */ |
| 185 | bfd_elf_generic_reloc, /* special_function */ |
| 186 | "R_M32C_HI16", /* name */ |
| 187 | FALSE, /* partial_inplace */ |
| 188 | 0, /* src_mask */ |
| 189 | 0x0000ffff, /* dst_mask */ |
| 190 | FALSE), /* pcrel_offset */ |
| 191 | }; |
| 192 | \f |
| 193 | /* Map BFD reloc types to M32C ELF reloc types. */ |
| 194 | |
| 195 | struct m32c_reloc_map |
| 196 | { |
| 197 | bfd_reloc_code_real_type bfd_reloc_val; |
| 198 | unsigned int m32c_reloc_val; |
| 199 | }; |
| 200 | |
| 201 | static const struct m32c_reloc_map m32c_reloc_map [] = |
| 202 | { |
| 203 | { BFD_RELOC_NONE, R_M32C_NONE }, |
| 204 | { BFD_RELOC_16, R_M32C_16 }, |
| 205 | { BFD_RELOC_24, R_M32C_24 }, |
| 206 | { BFD_RELOC_32, R_M32C_32 }, |
| 207 | { BFD_RELOC_8_PCREL, R_M32C_8_PCREL }, |
| 208 | { BFD_RELOC_16_PCREL, R_M32C_16_PCREL }, |
| 209 | { BFD_RELOC_8, R_M32C_8 }, |
| 210 | { BFD_RELOC_LO16, R_M32C_LO16 }, |
| 211 | { BFD_RELOC_HI16, R_M32C_HI16 }, |
| 212 | { BFD_RELOC_M32C_HI8, R_M32C_HI8 } |
| 213 | }; |
| 214 | |
| 215 | static reloc_howto_type * |
| 216 | m32c_reloc_type_lookup |
| 217 | (bfd * abfd ATTRIBUTE_UNUSED, |
| 218 | bfd_reloc_code_real_type code) |
| 219 | { |
| 220 | unsigned int i; |
| 221 | |
| 222 | for (i = ARRAY_SIZE (m32c_reloc_map); --i;) |
| 223 | if (m32c_reloc_map [i].bfd_reloc_val == code) |
| 224 | return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val]; |
| 225 | |
| 226 | return NULL; |
| 227 | } |
| 228 | |
| 229 | /* Set the howto pointer for an M32C ELF reloc. */ |
| 230 | |
| 231 | static void |
| 232 | m32c_info_to_howto_rela |
| 233 | (bfd * abfd ATTRIBUTE_UNUSED, |
| 234 | arelent * cache_ptr, |
| 235 | Elf_Internal_Rela * dst) |
| 236 | { |
| 237 | unsigned int r_type; |
| 238 | |
| 239 | r_type = ELF32_R_TYPE (dst->r_info); |
| 240 | BFD_ASSERT (r_type < (unsigned int) R_M32C_max); |
| 241 | cache_ptr->howto = & m32c_elf_howto_table [r_type]; |
| 242 | } |
| 243 | |
| 244 | \f |
| 245 | |
| 246 | /* Relocate an M32C ELF section. |
| 247 | There is some attempt to make this function usable for many architectures, |
| 248 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], |
| 249 | if only to serve as a learning tool. |
| 250 | |
| 251 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 252 | to handle the relocations for a section. |
| 253 | |
| 254 | The relocs are always passed as Rela structures; if the section |
| 255 | actually uses Rel structures, the r_addend field will always be |
| 256 | zero. |
| 257 | |
| 258 | This function is responsible for adjusting the section contents as |
| 259 | necessary, and (if using Rela relocs and generating a relocatable |
| 260 | output file) adjusting the reloc addend as necessary. |
| 261 | |
| 262 | This function does not have to worry about setting the reloc |
| 263 | address or the reloc symbol index. |
| 264 | |
| 265 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 266 | |
| 267 | LOCAL_SECTIONS is an array giving the section in the input file |
| 268 | corresponding to the st_shndx field of each local symbol. |
| 269 | |
| 270 | The global hash table entry for the global symbols can be found |
| 271 | via elf_sym_hashes (input_bfd). |
| 272 | |
| 273 | When generating relocatable output, this function must handle |
| 274 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 275 | going to be the section symbol corresponding to the output |
| 276 | section, which means that the addend must be adjusted |
| 277 | accordingly. */ |
| 278 | |
| 279 | static bfd_boolean |
| 280 | m32c_elf_relocate_section |
| 281 | (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 282 | struct bfd_link_info * info, |
| 283 | bfd * input_bfd, |
| 284 | asection * input_section, |
| 285 | bfd_byte * contents, |
| 286 | Elf_Internal_Rela * relocs, |
| 287 | Elf_Internal_Sym * local_syms, |
| 288 | asection ** local_sections) |
| 289 | { |
| 290 | Elf_Internal_Shdr * symtab_hdr; |
| 291 | struct elf_link_hash_entry ** sym_hashes; |
| 292 | Elf_Internal_Rela * rel; |
| 293 | Elf_Internal_Rela * relend; |
| 294 | bfd *dynobj; |
| 295 | asection *splt; |
| 296 | |
| 297 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 298 | sym_hashes = elf_sym_hashes (input_bfd); |
| 299 | relend = relocs + input_section->reloc_count; |
| 300 | |
| 301 | dynobj = elf_hash_table (info)->dynobj; |
| 302 | splt = NULL; |
| 303 | if (dynobj != NULL) |
| 304 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 305 | |
| 306 | for (rel = relocs; rel < relend; rel ++) |
| 307 | { |
| 308 | reloc_howto_type * howto; |
| 309 | unsigned long r_symndx; |
| 310 | Elf_Internal_Sym * sym; |
| 311 | asection * sec; |
| 312 | struct elf_link_hash_entry * h; |
| 313 | bfd_vma relocation; |
| 314 | bfd_reloc_status_type r; |
| 315 | const char * name = NULL; |
| 316 | int r_type; |
| 317 | |
| 318 | r_type = ELF32_R_TYPE (rel->r_info); |
| 319 | |
| 320 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 321 | |
| 322 | if (info->relocatable) |
| 323 | { |
| 324 | /* This is a relocatable link. We don't have to change |
| 325 | anything, unless the reloc is against a section symbol, |
| 326 | in which case we have to adjust according to where the |
| 327 | section symbol winds up in the output section. */ |
| 328 | if (r_symndx < symtab_hdr->sh_info) |
| 329 | { |
| 330 | sym = local_syms + r_symndx; |
| 331 | |
| 332 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 333 | { |
| 334 | sec = local_sections [r_symndx]; |
| 335 | rel->r_addend += sec->output_offset + sym->st_value; |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | continue; |
| 340 | } |
| 341 | |
| 342 | /* This is a final link. */ |
| 343 | howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
| 344 | h = NULL; |
| 345 | sym = NULL; |
| 346 | sec = NULL; |
| 347 | |
| 348 | if (r_symndx < symtab_hdr->sh_info) |
| 349 | { |
| 350 | sym = local_syms + r_symndx; |
| 351 | sec = local_sections [r_symndx]; |
| 352 | relocation = (sec->output_section->vma |
| 353 | + sec->output_offset |
| 354 | + sym->st_value); |
| 355 | |
| 356 | name = bfd_elf_string_from_elf_section |
| 357 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 358 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 359 | } |
| 360 | else |
| 361 | { |
| 362 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; |
| 363 | |
| 364 | while (h->root.type == bfd_link_hash_indirect |
| 365 | || h->root.type == bfd_link_hash_warning) |
| 366 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 367 | |
| 368 | name = h->root.root.string; |
| 369 | |
| 370 | if (h->root.type == bfd_link_hash_defined |
| 371 | || h->root.type == bfd_link_hash_defweak) |
| 372 | { |
| 373 | sec = h->root.u.def.section; |
| 374 | relocation = (h->root.u.def.value |
| 375 | + sec->output_section->vma |
| 376 | + sec->output_offset); |
| 377 | } |
| 378 | else if (h->root.type == bfd_link_hash_undefweak) |
| 379 | { |
| 380 | relocation = 0; |
| 381 | } |
| 382 | else |
| 383 | { |
| 384 | if (! ((*info->callbacks->undefined_symbol) |
| 385 | (info, h->root.root.string, input_bfd, |
| 386 | input_section, rel->r_offset, TRUE))) |
| 387 | return FALSE; |
| 388 | relocation = 0; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | switch (ELF32_R_TYPE (rel->r_info)) |
| 393 | { |
| 394 | case R_M32C_16: |
| 395 | { |
| 396 | bfd_vma *plt_offset; |
| 397 | |
| 398 | if (h != NULL) |
| 399 | plt_offset = &h->plt.offset; |
| 400 | else |
| 401 | plt_offset = elf_local_got_offsets (input_bfd) + r_symndx; |
| 402 | |
| 403 | /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)", |
| 404 | relocation, *plt_offset);*/ |
| 405 | if (relocation <= 0xffff) |
| 406 | { |
| 407 | /* If the symbol is in range for a 16-bit address, we should |
| 408 | have deallocated the plt entry in relax_section. */ |
| 409 | BFD_ASSERT (*plt_offset == (bfd_vma) -1); |
| 410 | } |
| 411 | else |
| 412 | { |
| 413 | /* If the symbol is out of range for a 16-bit address, |
| 414 | we must have allocated a plt entry. */ |
| 415 | BFD_ASSERT (*plt_offset != (bfd_vma) -1); |
| 416 | |
| 417 | /* If this is the first time we've processed this symbol, |
| 418 | fill in the plt entry with the correct symbol address. */ |
| 419 | if ((*plt_offset & 1) == 0) |
| 420 | { |
| 421 | unsigned int x; |
| 422 | |
| 423 | x = 0x000000fc; /* jmpf */ |
| 424 | x |= (relocation << 8) & 0xffffff00; |
| 425 | bfd_put_32 (input_bfd, x, splt->contents + *plt_offset); |
| 426 | *plt_offset |= 1; |
| 427 | } |
| 428 | |
| 429 | relocation = (splt->output_section->vma |
| 430 | + splt->output_offset |
| 431 | + (*plt_offset & -2)); |
| 432 | } |
| 433 | } |
| 434 | break; |
| 435 | |
| 436 | case R_M32C_HI8: |
| 437 | case R_M32C_HI16: |
| 438 | relocation >>= 16; |
| 439 | break; |
| 440 | } |
| 441 | |
| 442 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 443 | contents, rel->r_offset, relocation, |
| 444 | rel->r_addend); |
| 445 | |
| 446 | if (r != bfd_reloc_ok) |
| 447 | { |
| 448 | const char * msg = (const char *) NULL; |
| 449 | |
| 450 | switch (r) |
| 451 | { |
| 452 | case bfd_reloc_overflow: |
| 453 | r = info->callbacks->reloc_overflow |
| 454 | (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, |
| 455 | input_bfd, input_section, rel->r_offset); |
| 456 | break; |
| 457 | |
| 458 | case bfd_reloc_undefined: |
| 459 | r = info->callbacks->undefined_symbol |
| 460 | (info, name, input_bfd, input_section, rel->r_offset, |
| 461 | TRUE); |
| 462 | break; |
| 463 | |
| 464 | case bfd_reloc_outofrange: |
| 465 | msg = _("internal error: out of range error"); |
| 466 | break; |
| 467 | |
| 468 | case bfd_reloc_notsupported: |
| 469 | msg = _("internal error: unsupported relocation error"); |
| 470 | break; |
| 471 | |
| 472 | case bfd_reloc_dangerous: |
| 473 | msg = _("internal error: dangerous relocation"); |
| 474 | break; |
| 475 | |
| 476 | default: |
| 477 | msg = _("internal error: unknown error"); |
| 478 | break; |
| 479 | } |
| 480 | |
| 481 | if (msg) |
| 482 | r = info->callbacks->warning |
| 483 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 484 | |
| 485 | if (! r) |
| 486 | return FALSE; |
| 487 | } |
| 488 | } |
| 489 | |
| 490 | return TRUE; |
| 491 | } |
| 492 | \f |
| 493 | /* Return the section that should be marked against GC for a given |
| 494 | relocation. */ |
| 495 | |
| 496 | static asection * |
| 497 | m32c_elf_gc_mark_hook |
| 498 | (asection * sec, |
| 499 | struct bfd_link_info * info ATTRIBUTE_UNUSED, |
| 500 | Elf_Internal_Rela * rel, |
| 501 | struct elf_link_hash_entry * h, |
| 502 | Elf_Internal_Sym * sym) |
| 503 | { |
| 504 | if (h != NULL) |
| 505 | { |
| 506 | switch (ELF32_R_TYPE (rel->r_info)) |
| 507 | { |
| 508 | default: |
| 509 | switch (h->root.type) |
| 510 | { |
| 511 | case bfd_link_hash_defined: |
| 512 | case bfd_link_hash_defweak: |
| 513 | return h->root.u.def.section; |
| 514 | |
| 515 | case bfd_link_hash_common: |
| 516 | return h->root.u.c.p->section; |
| 517 | |
| 518 | default: |
| 519 | break; |
| 520 | } |
| 521 | } |
| 522 | } |
| 523 | else |
| 524 | { |
| 525 | if (!(elf_bad_symtab (sec->owner) |
| 526 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
| 527 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
| 528 | && sym->st_shndx != SHN_COMMON)) |
| 529 | { |
| 530 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | return NULL; |
| 535 | } |
| 536 | |
| 537 | /* Update the got entry reference counts for the section being removed. */ |
| 538 | |
| 539 | static bfd_boolean |
| 540 | m32c_elf_gc_sweep_hook |
| 541 | (bfd * abfd ATTRIBUTE_UNUSED, |
| 542 | struct bfd_link_info * info ATTRIBUTE_UNUSED, |
| 543 | asection * sec ATTRIBUTE_UNUSED, |
| 544 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED) |
| 545 | { |
| 546 | return TRUE; |
| 547 | } |
| 548 | |
| 549 | /* We support 16-bit pointers to code above 64k by generating a thunk |
| 550 | below 64k containing a JMP instruction to the final address. */ |
| 551 | |
| 552 | static bfd_boolean |
| 553 | m32c_elf_check_relocs |
| 554 | (bfd * abfd, |
| 555 | struct bfd_link_info * info, |
| 556 | asection * sec, |
| 557 | const Elf_Internal_Rela * relocs) |
| 558 | { |
| 559 | Elf_Internal_Shdr * symtab_hdr; |
| 560 | struct elf_link_hash_entry ** sym_hashes; |
| 561 | struct elf_link_hash_entry ** sym_hashes_end; |
| 562 | const Elf_Internal_Rela * rel; |
| 563 | const Elf_Internal_Rela * rel_end; |
| 564 | bfd_vma *local_plt_offsets; |
| 565 | asection *splt; |
| 566 | bfd *dynobj; |
| 567 | |
| 568 | if (info->relocatable) |
| 569 | return TRUE; |
| 570 | |
| 571 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 572 | sym_hashes = elf_sym_hashes (abfd); |
| 573 | local_plt_offsets = elf_local_got_offsets (abfd); |
| 574 | splt = NULL; |
| 575 | dynobj = elf_hash_table(info)->dynobj; |
| 576 | |
| 577 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| 578 | if (!elf_bad_symtab (abfd)) |
| 579 | sym_hashes_end -= symtab_hdr->sh_info; |
| 580 | |
| 581 | rel_end = relocs + sec->reloc_count; |
| 582 | for (rel = relocs; rel < rel_end; rel++) |
| 583 | { |
| 584 | struct elf_link_hash_entry *h; |
| 585 | unsigned long r_symndx; |
| 586 | bfd_vma *offset; |
| 587 | |
| 588 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 589 | if (r_symndx < symtab_hdr->sh_info) |
| 590 | h = NULL; |
| 591 | else |
| 592 | { |
| 593 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 594 | while (h->root.type == bfd_link_hash_indirect |
| 595 | || h->root.type == bfd_link_hash_warning) |
| 596 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 597 | } |
| 598 | |
| 599 | switch (ELF32_R_TYPE (rel->r_info)) |
| 600 | { |
| 601 | /* This relocation describes a 16-bit pointer to a function. |
| 602 | We may need to allocate a thunk in low memory; reserve memory |
| 603 | for it now. */ |
| 604 | case R_M32C_16: |
| 605 | if (dynobj == NULL) |
| 606 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 607 | if (splt == NULL) |
| 608 | { |
| 609 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 610 | if (splt == NULL) |
| 611 | { |
| 612 | splt = bfd_make_section (dynobj, ".plt"); |
| 613 | if (splt == NULL |
| 614 | || ! bfd_set_section_flags (dynobj, splt, |
| 615 | (SEC_ALLOC |
| 616 | | SEC_LOAD |
| 617 | | SEC_HAS_CONTENTS |
| 618 | | SEC_IN_MEMORY |
| 619 | | SEC_LINKER_CREATED |
| 620 | | SEC_READONLY |
| 621 | | SEC_CODE)) |
| 622 | || ! bfd_set_section_alignment (dynobj, splt, 1)) |
| 623 | return FALSE; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | if (h != NULL) |
| 628 | offset = &h->plt.offset; |
| 629 | else |
| 630 | { |
| 631 | if (local_plt_offsets == NULL) |
| 632 | { |
| 633 | size_t size; |
| 634 | unsigned int i; |
| 635 | |
| 636 | size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| 637 | local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| 638 | if (local_plt_offsets == NULL) |
| 639 | return FALSE; |
| 640 | elf_local_got_offsets (abfd) = local_plt_offsets; |
| 641 | |
| 642 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 643 | local_plt_offsets[i] = (bfd_vma) -1; |
| 644 | } |
| 645 | offset = &local_plt_offsets[r_symndx]; |
| 646 | } |
| 647 | |
| 648 | if (*offset == (bfd_vma) -1) |
| 649 | { |
| 650 | *offset = splt->size; |
| 651 | splt->size += 4; |
| 652 | } |
| 653 | break; |
| 654 | } |
| 655 | } |
| 656 | |
| 657 | return TRUE; |
| 658 | } |
| 659 | |
| 660 | /* This must exist if dynobj is ever set. */ |
| 661 | |
| 662 | static bfd_boolean |
| 663 | m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 664 | struct bfd_link_info *info) |
| 665 | { |
| 666 | bfd *dynobj; |
| 667 | asection *splt; |
| 668 | |
| 669 | /* As an extra sanity check, verify that all plt entries have |
| 670 | been filled in. */ |
| 671 | |
| 672 | if ((dynobj = elf_hash_table (info)->dynobj) != NULL |
| 673 | && (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL) |
| 674 | { |
| 675 | bfd_byte *contents = splt->contents; |
| 676 | unsigned int i, size = splt->size; |
| 677 | for (i = 0; i < size; i += 4) |
| 678 | { |
| 679 | unsigned int x = bfd_get_32 (dynobj, contents + i); |
| 680 | BFD_ASSERT (x != 0); |
| 681 | } |
| 682 | } |
| 683 | |
| 684 | return TRUE; |
| 685 | } |
| 686 | |
| 687 | static bfd_boolean |
| 688 | m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 689 | struct bfd_link_info *info) |
| 690 | { |
| 691 | bfd *dynobj; |
| 692 | asection *splt; |
| 693 | |
| 694 | if (info->relocatable) |
| 695 | return TRUE; |
| 696 | |
| 697 | dynobj = elf_hash_table (info)->dynobj; |
| 698 | if (dynobj == NULL) |
| 699 | return TRUE; |
| 700 | |
| 701 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 702 | BFD_ASSERT (splt != NULL); |
| 703 | |
| 704 | splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size); |
| 705 | if (splt->contents == NULL) |
| 706 | return FALSE; |
| 707 | |
| 708 | return TRUE; |
| 709 | } |
| 710 | \f |
| 711 | /* Function to set the ELF flag bits. */ |
| 712 | |
| 713 | static bfd_boolean |
| 714 | m32c_elf_set_private_flags (bfd *abfd, flagword flags) |
| 715 | { |
| 716 | elf_elfheader (abfd)->e_flags = flags; |
| 717 | elf_flags_init (abfd) = TRUE; |
| 718 | return TRUE; |
| 719 | } |
| 720 | |
| 721 | /* Merge backend specific data from an object file to the output |
| 722 | object file when linking. */ |
| 723 | |
| 724 | static bfd_boolean |
| 725 | m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 726 | { |
| 727 | flagword old_flags, old_partial; |
| 728 | flagword new_flags, new_partial; |
| 729 | bfd_boolean error = FALSE; |
| 730 | char new_opt[80]; |
| 731 | char old_opt[80]; |
| 732 | |
| 733 | new_opt[0] = old_opt[0] = '\0'; |
| 734 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 735 | old_flags = elf_elfheader (obfd)->e_flags; |
| 736 | |
| 737 | #ifdef DEBUG |
| 738 | (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s", |
| 739 | old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", |
| 740 | bfd_get_filename (ibfd)); |
| 741 | #endif |
| 742 | |
| 743 | if (!elf_flags_init (obfd)) |
| 744 | { |
| 745 | /* First call, no flags set. */ |
| 746 | elf_flags_init (obfd) = TRUE; |
| 747 | elf_elfheader (obfd)->e_flags = new_flags; |
| 748 | } |
| 749 | |
| 750 | else if (new_flags == old_flags) |
| 751 | /* Compatible flags are ok. */ |
| 752 | ; |
| 753 | |
| 754 | else /* Possibly incompatible flags. */ |
| 755 | { |
| 756 | /* Warn if different cpu is used (allow a specific cpu to override |
| 757 | the generic cpu). */ |
| 758 | new_partial = (new_flags & EF_M32C_CPU_MASK); |
| 759 | old_partial = (old_flags & EF_M32C_CPU_MASK); |
| 760 | if (new_partial == old_partial) |
| 761 | ; |
| 762 | |
| 763 | else |
| 764 | { |
| 765 | switch (new_partial) |
| 766 | { |
| 767 | default: strcat (new_opt, " -m16c"); break; |
| 768 | case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break; |
| 769 | case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break; |
| 770 | } |
| 771 | |
| 772 | switch (old_partial) |
| 773 | { |
| 774 | default: strcat (old_opt, " -m16c"); break; |
| 775 | case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break; |
| 776 | case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break; |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | /* Print out any mismatches from above. */ |
| 781 | if (new_opt[0]) |
| 782 | { |
| 783 | error = TRUE; |
| 784 | (*_bfd_error_handler) |
| 785 | (_("%s: compiled with %s and linked with modules compiled with %s"), |
| 786 | bfd_get_filename (ibfd), new_opt, old_opt); |
| 787 | } |
| 788 | |
| 789 | new_flags &= ~ EF_M32C_ALL_FLAGS; |
| 790 | old_flags &= ~ EF_M32C_ALL_FLAGS; |
| 791 | |
| 792 | /* Warn about any other mismatches. */ |
| 793 | if (new_flags != old_flags) |
| 794 | { |
| 795 | error = TRUE; |
| 796 | (*_bfd_error_handler) |
| 797 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
| 798 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | if (error) |
| 803 | bfd_set_error (bfd_error_bad_value); |
| 804 | |
| 805 | return !error; |
| 806 | } |
| 807 | |
| 808 | \f |
| 809 | static bfd_boolean |
| 810 | m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr) |
| 811 | { |
| 812 | FILE *file = (FILE *) ptr; |
| 813 | flagword flags; |
| 814 | |
| 815 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 816 | |
| 817 | /* Print normal ELF private data. */ |
| 818 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 819 | |
| 820 | flags = elf_elfheader (abfd)->e_flags; |
| 821 | fprintf (file, _("private flags = 0x%lx:"), (long)flags); |
| 822 | |
| 823 | switch (flags & EF_M32C_CPU_MASK) |
| 824 | { |
| 825 | default: break; |
| 826 | case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break; |
| 827 | case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break; |
| 828 | } |
| 829 | |
| 830 | fputc ('\n', file); |
| 831 | return TRUE; |
| 832 | } |
| 833 | |
| 834 | /* Return the MACH for an e_flags value. */ |
| 835 | |
| 836 | static int |
| 837 | elf32_m32c_machine (bfd *abfd) |
| 838 | { |
| 839 | switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) |
| 840 | { |
| 841 | case EF_M32C_CPU_M16C: return bfd_mach_m16c; |
| 842 | case EF_M32C_CPU_M32C: return bfd_mach_m32c; |
| 843 | } |
| 844 | |
| 845 | return bfd_mach_m16c; |
| 846 | } |
| 847 | |
| 848 | static bfd_boolean |
| 849 | m32c_elf_object_p (bfd *abfd) |
| 850 | { |
| 851 | bfd_default_set_arch_mach (abfd, bfd_arch_m32c, |
| 852 | elf32_m32c_machine (abfd)); |
| 853 | return TRUE; |
| 854 | } |
| 855 | \f |
| 856 | |
| 857 | #ifdef DEBUG |
| 858 | static void |
| 859 | dump_symtab (bfd * abfd, void *internal_syms, void *external_syms) |
| 860 | { |
| 861 | size_t locsymcount; |
| 862 | Elf_Internal_Sym *isymbuf; |
| 863 | Elf_Internal_Sym *isymend; |
| 864 | Elf_Internal_Sym *isym; |
| 865 | Elf_Internal_Shdr *symtab_hdr; |
| 866 | bfd_boolean free_internal = 0, free_external = 0; |
| 867 | char * st_info_str; |
| 868 | char * st_info_stb_str; |
| 869 | char * st_other_str; |
| 870 | char * st_shndx_str; |
| 871 | |
| 872 | if (! internal_syms) |
| 873 | { |
| 874 | internal_syms = bfd_malloc (1000); |
| 875 | free_internal = 1; |
| 876 | } |
| 877 | if (! external_syms) |
| 878 | { |
| 879 | external_syms = bfd_malloc (1000); |
| 880 | free_external = 1; |
| 881 | } |
| 882 | |
| 883 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 884 | locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym; |
| 885 | if (free_internal) |
| 886 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 887 | symtab_hdr->sh_info, 0, |
| 888 | internal_syms, external_syms, NULL); |
| 889 | else |
| 890 | isymbuf = internal_syms; |
| 891 | isymend = isymbuf + locsymcount; |
| 892 | |
| 893 | for (isym = isymbuf ; isym < isymend ; isym++) |
| 894 | { |
| 895 | switch (ELF_ST_TYPE (isym->st_info)) |
| 896 | { |
| 897 | case STT_FUNC: st_info_str = "STT_FUNC"; |
| 898 | case STT_SECTION: st_info_str = "STT_SECTION"; |
| 899 | case STT_SRELC: st_info_str = "STT_SRELC"; |
| 900 | case STT_FILE: st_info_str = "STT_FILE"; |
| 901 | case STT_OBJECT: st_info_str = "STT_OBJECT"; |
| 902 | case STT_TLS: st_info_str = "STT_TLS"; |
| 903 | default: st_info_str = ""; |
| 904 | } |
| 905 | switch (ELF_ST_BIND (isym->st_info)) |
| 906 | { |
| 907 | case STB_LOCAL: st_info_stb_str = "STB_LOCAL"; |
| 908 | case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL"; |
| 909 | default: st_info_stb_str = ""; |
| 910 | } |
| 911 | switch (ELF_ST_VISIBILITY (isym->st_other)) |
| 912 | { |
| 913 | case STV_DEFAULT: st_other_str = "STV_DEFAULT"; |
| 914 | case STV_INTERNAL: st_other_str = "STV_INTERNAL"; |
| 915 | case STV_PROTECTED: st_other_str = "STV_PROTECTED"; |
| 916 | default: st_other_str = ""; |
| 917 | } |
| 918 | switch (isym->st_shndx) |
| 919 | { |
| 920 | case SHN_ABS: st_shndx_str = "SHN_ABS"; |
| 921 | case SHN_COMMON: st_shndx_str = "SHN_COMMON"; |
| 922 | case SHN_UNDEF: st_shndx_str = "SHN_UNDEF"; |
| 923 | default: st_shndx_str = ""; |
| 924 | } |
| 925 | |
| 926 | printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s " |
| 927 | "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n", |
| 928 | isym, |
| 929 | (unsigned long) isym->st_value, |
| 930 | (unsigned long) isym->st_size, |
| 931 | isym->st_name, |
| 932 | bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link, |
| 933 | isym->st_name), |
| 934 | isym->st_info, st_info_str, st_info_stb_str, |
| 935 | isym->st_other, st_other_str, |
| 936 | isym->st_shndx, st_shndx_str); |
| 937 | } |
| 938 | if (free_internal) |
| 939 | free (internal_syms); |
| 940 | if (free_external) |
| 941 | free (external_syms); |
| 942 | } |
| 943 | |
| 944 | static char * |
| 945 | m32c_get_reloc (long reloc) |
| 946 | { |
| 947 | if (0 <= reloc && reloc < R_M32C_max) |
| 948 | return m32c_elf_howto_table[reloc].name; |
| 949 | else |
| 950 | return ""; |
| 951 | } |
| 952 | #endif /* DEBUG */ |
| 953 | |
| 954 | /* Handle relaxing. */ |
| 955 | |
| 956 | /* A subroutine of m32c_elf_relax_section. If the global symbol H |
| 957 | is within the low 64k, remove any entry for it in the plt. */ |
| 958 | |
| 959 | struct relax_plt_data |
| 960 | { |
| 961 | asection *splt; |
| 962 | bfd_boolean *again; |
| 963 | }; |
| 964 | |
| 965 | static bfd_boolean |
| 966 | m32c_relax_plt_check (struct elf_link_hash_entry *h, |
| 967 | PTR xdata) |
| 968 | { |
| 969 | struct relax_plt_data *data = (struct relax_plt_data *) xdata; |
| 970 | |
| 971 | if (h->root.type == bfd_link_hash_warning) |
| 972 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 973 | |
| 974 | if (h->plt.offset != (bfd_vma) -1) |
| 975 | { |
| 976 | bfd_vma address; |
| 977 | |
| 978 | if (h->root.type == bfd_link_hash_undefined |
| 979 | || h->root.type == bfd_link_hash_undefweak) |
| 980 | address = 0; |
| 981 | else |
| 982 | address = (h->root.u.def.section->output_section->vma |
| 983 | + h->root.u.def.section->output_offset |
| 984 | + h->root.u.def.value); |
| 985 | |
| 986 | if (address <= 0xffff) |
| 987 | { |
| 988 | h->plt.offset = -1; |
| 989 | data->splt->size -= 4; |
| 990 | *data->again = TRUE; |
| 991 | } |
| 992 | } |
| 993 | |
| 994 | return TRUE; |
| 995 | } |
| 996 | |
| 997 | /* A subroutine of m32c_elf_relax_section. If the global symbol H |
| 998 | previously had a plt entry, give it a new entry offset. */ |
| 999 | |
| 1000 | static bfd_boolean |
| 1001 | m32c_relax_plt_realloc (struct elf_link_hash_entry *h, |
| 1002 | PTR xdata) |
| 1003 | { |
| 1004 | bfd_vma *entry = (bfd_vma *) xdata; |
| 1005 | |
| 1006 | if (h->root.type == bfd_link_hash_warning) |
| 1007 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1008 | |
| 1009 | if (h->plt.offset != (bfd_vma) -1) |
| 1010 | { |
| 1011 | h->plt.offset = *entry; |
| 1012 | *entry += 4; |
| 1013 | } |
| 1014 | |
| 1015 | return TRUE; |
| 1016 | } |
| 1017 | |
| 1018 | static bfd_boolean |
| 1019 | m32c_elf_relax_plt_section (bfd *dynobj, |
| 1020 | asection *splt, |
| 1021 | struct bfd_link_info *info, |
| 1022 | bfd_boolean *again) |
| 1023 | { |
| 1024 | struct relax_plt_data relax_plt_data; |
| 1025 | bfd *ibfd; |
| 1026 | |
| 1027 | /* Assume nothing changes. */ |
| 1028 | *again = FALSE; |
| 1029 | |
| 1030 | if (info->relocatable) |
| 1031 | return TRUE; |
| 1032 | |
| 1033 | /* We only relax the .plt section at the moment. */ |
| 1034 | if (dynobj != elf_hash_table (info)->dynobj |
| 1035 | || strcmp (splt->name, ".plt") != 0) |
| 1036 | return TRUE; |
| 1037 | |
| 1038 | /* Quick check for an empty plt. */ |
| 1039 | if (splt->size == 0) |
| 1040 | return TRUE; |
| 1041 | |
| 1042 | /* Map across all global symbols; see which ones happen to |
| 1043 | fall in the low 64k. */ |
| 1044 | relax_plt_data.splt = splt; |
| 1045 | relax_plt_data.again = again; |
| 1046 | elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check, |
| 1047 | &relax_plt_data); |
| 1048 | |
| 1049 | /* Likewise for local symbols, though that's somewhat less convenient |
| 1050 | as we have to walk the list of input bfds and swap in symbol data. */ |
| 1051 | for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) |
| 1052 | { |
| 1053 | bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); |
| 1054 | Elf_Internal_Shdr *symtab_hdr; |
| 1055 | Elf_Internal_Sym *isymbuf = NULL; |
| 1056 | unsigned int idx; |
| 1057 | |
| 1058 | if (! local_plt_offsets) |
| 1059 | continue; |
| 1060 | |
| 1061 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 1062 | if (symtab_hdr->sh_info != 0) |
| 1063 | { |
| 1064 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1065 | if (isymbuf == NULL) |
| 1066 | isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 1067 | symtab_hdr->sh_info, 0, |
| 1068 | NULL, NULL, NULL); |
| 1069 | if (isymbuf == NULL) |
| 1070 | return FALSE; |
| 1071 | } |
| 1072 | |
| 1073 | for (idx = 0; idx < symtab_hdr->sh_info; ++idx) |
| 1074 | { |
| 1075 | Elf_Internal_Sym *isym; |
| 1076 | asection *tsec; |
| 1077 | bfd_vma address; |
| 1078 | |
| 1079 | if (local_plt_offsets[idx] == (bfd_vma) -1) |
| 1080 | continue; |
| 1081 | |
| 1082 | isym = &isymbuf[idx]; |
| 1083 | if (isym->st_shndx == SHN_UNDEF) |
| 1084 | continue; |
| 1085 | else if (isym->st_shndx == SHN_ABS) |
| 1086 | tsec = bfd_abs_section_ptr; |
| 1087 | else if (isym->st_shndx == SHN_COMMON) |
| 1088 | tsec = bfd_com_section_ptr; |
| 1089 | else |
| 1090 | tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx); |
| 1091 | |
| 1092 | address = (tsec->output_section->vma |
| 1093 | + tsec->output_offset |
| 1094 | + isym->st_value); |
| 1095 | if (address <= 0xffff) |
| 1096 | { |
| 1097 | local_plt_offsets[idx] = -1; |
| 1098 | splt->size -= 4; |
| 1099 | *again = TRUE; |
| 1100 | } |
| 1101 | } |
| 1102 | |
| 1103 | if (isymbuf != NULL |
| 1104 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1105 | { |
| 1106 | if (! info->keep_memory) |
| 1107 | free (isymbuf); |
| 1108 | else |
| 1109 | { |
| 1110 | /* Cache the symbols for elf_link_input_bfd. */ |
| 1111 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1112 | } |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | /* If we changed anything, walk the symbols again to reallocate |
| 1117 | .plt entry addresses. */ |
| 1118 | if (*again && splt->size > 0) |
| 1119 | { |
| 1120 | bfd_vma entry = 0; |
| 1121 | |
| 1122 | elf_link_hash_traverse (elf_hash_table (info), |
| 1123 | m32c_relax_plt_realloc, &entry); |
| 1124 | |
| 1125 | for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) |
| 1126 | { |
| 1127 | bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); |
| 1128 | unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info; |
| 1129 | unsigned int idx; |
| 1130 | |
| 1131 | if (! local_plt_offsets) |
| 1132 | continue; |
| 1133 | |
| 1134 | for (idx = 0; idx < nlocals; ++idx) |
| 1135 | if (local_plt_offsets[idx] != (bfd_vma) -1) |
| 1136 | { |
| 1137 | local_plt_offsets[idx] = entry; |
| 1138 | entry += 4; |
| 1139 | } |
| 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | return TRUE; |
| 1144 | } |
| 1145 | |
| 1146 | struct relax_reloc_s |
| 1147 | { |
| 1148 | int machine; |
| 1149 | int opcode_mask; |
| 1150 | bfd_vma opcode; /* original opcode or insn part */ |
| 1151 | int relax_backward; /* lbound */ |
| 1152 | int relax_forward; /* hbound */ |
| 1153 | int value_shift; |
| 1154 | int mask; |
| 1155 | int new_opcode; /* new opcode */ |
| 1156 | int old_reloc; /* old relocation */ |
| 1157 | int new_reloc; /* new relocation */ |
| 1158 | int use_pcrel; |
| 1159 | int delete_n; /* # bytes differ between original and new */ |
| 1160 | }; |
| 1161 | static struct relax_reloc_s relax_reloc [] = |
| 1162 | { |
| 1163 | #if 0 |
| 1164 | { |
| 1165 | bfd_mach_m16c, |
| 1166 | 0xff, |
| 1167 | 0xfc, /* jmp.a */ |
| 1168 | -32768, |
| 1169 | 32767, |
| 1170 | 2, |
| 1171 | 0xffffff00, |
| 1172 | 0xf4, /* jmp.w */ |
| 1173 | R_M32C_8_ELABEL24, |
| 1174 | R_M32C_8_PCREL16, |
| 1175 | 1, |
| 1176 | 1, |
| 1177 | }, |
| 1178 | { |
| 1179 | bfd_mach_m32c, |
| 1180 | 0xff, |
| 1181 | 0xcc, /* jmp.a */ |
| 1182 | -32768, |
| 1183 | 32767, |
| 1184 | 2, |
| 1185 | 0xffffff00, |
| 1186 | 0xce, /* jmp.w */ |
| 1187 | R_M32C_8_ELABEL24, |
| 1188 | R_M32C_8_PCREL16, |
| 1189 | 1, |
| 1190 | 1, |
| 1191 | }, |
| 1192 | { |
| 1193 | bfd_mach_m32c, |
| 1194 | 0xff, |
| 1195 | 0xcd, /* jsr.a */ |
| 1196 | -32768, |
| 1197 | 32767, |
| 1198 | 2, |
| 1199 | 0xffffff00, |
| 1200 | 0xcf, /* jsr.w */ |
| 1201 | R_M32C_8_ELABEL24, |
| 1202 | R_M32C_8_PCREL16, |
| 1203 | 1, |
| 1204 | 1, |
| 1205 | }, |
| 1206 | { |
| 1207 | bfd_mach_m16c, |
| 1208 | 0xff, |
| 1209 | 0xf4, /* jmp.w */ |
| 1210 | -128, |
| 1211 | 127, |
| 1212 | 2, |
| 1213 | 0xffffff00, |
| 1214 | 0xfe, /* jmp.b */ |
| 1215 | R_M32C_8_PCREL16, |
| 1216 | R_M32C_8_PCREL8, |
| 1217 | 1, |
| 1218 | 1, |
| 1219 | }, |
| 1220 | { |
| 1221 | bfd_mach_m32c, |
| 1222 | 0xff, |
| 1223 | 0xce, /* jmp.w */ |
| 1224 | -128, |
| 1225 | 127, |
| 1226 | 2, |
| 1227 | 0xffffff00, |
| 1228 | 0xbb, /* jmp.b */ |
| 1229 | R_M32C_8_PCREL16, |
| 1230 | R_M32C_8_PCREL8, |
| 1231 | 1, |
| 1232 | 1, |
| 1233 | }, |
| 1234 | { |
| 1235 | bfd_mach_m32c, |
| 1236 | 0xc0f6, |
| 1237 | 0x8096, /* dest */ |
| 1238 | 0, |
| 1239 | 0xffff, |
| 1240 | 3, |
| 1241 | 0xffff3fff, |
| 1242 | 0xc000, /* abs16 */ |
| 1243 | R_M32C_24_ABS24, |
| 1244 | R_M32C_24_ABS16, |
| 1245 | 0, |
| 1246 | 1, |
| 1247 | }, |
| 1248 | { |
| 1249 | bfd_mach_m32c, |
| 1250 | 0xc0f6, |
| 1251 | 0x80a6, /* dest */ |
| 1252 | 0, |
| 1253 | 0xffff, |
| 1254 | 4, |
| 1255 | 0xffff3fff, |
| 1256 | 0xc000, /* abs16 */ |
| 1257 | R_M32C_32_ABS24, |
| 1258 | R_M32C_32_ABS16, |
| 1259 | 0, |
| 1260 | 1, |
| 1261 | }, |
| 1262 | { |
| 1263 | bfd_mach_m32c, |
| 1264 | 0xc0f6, |
| 1265 | 0x80b6, /* dest */ |
| 1266 | 0, |
| 1267 | 0xffff, |
| 1268 | 5, |
| 1269 | 0xffff3fff, |
| 1270 | 0xc000, /* abs16 */ |
| 1271 | R_M32C_40_ABS24, |
| 1272 | R_M32C_40_ABS16, |
| 1273 | 0, |
| 1274 | 1, |
| 1275 | }, |
| 1276 | { |
| 1277 | bfd_mach_m32c, |
| 1278 | 0x30f0, |
| 1279 | 0x20b0, /* src */ |
| 1280 | 0, |
| 1281 | 0xffff, |
| 1282 | 2, |
| 1283 | 0xffffcfff, |
| 1284 | 0x3000, /* abs16 */ |
| 1285 | R_M32C_16_ABS24, |
| 1286 | R_M32C_16_ABS16, |
| 1287 | 0, |
| 1288 | 1, |
| 1289 | }, |
| 1290 | { |
| 1291 | bfd_mach_m32c, |
| 1292 | 0xc086, |
| 1293 | 0x8086, /* dest */ |
| 1294 | 0, |
| 1295 | 0xffff, |
| 1296 | 2, |
| 1297 | 0xffff3fff, |
| 1298 | 0xc000, /* abs16 */ |
| 1299 | R_M32C_16_ABS24, |
| 1300 | R_M32C_16_ABS16, |
| 1301 | 0, |
| 1302 | 1, |
| 1303 | }, |
| 1304 | #endif |
| 1305 | { |
| 1306 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 1307 | } |
| 1308 | }; |
| 1309 | static bfd_boolean |
| 1310 | m32c_elf_relax_section |
| 1311 | (bfd * abfd, |
| 1312 | asection * sec, |
| 1313 | struct bfd_link_info * link_info, |
| 1314 | bfd_boolean * again) |
| 1315 | { |
| 1316 | Elf_Internal_Shdr *symtab_hdr; |
| 1317 | Elf_Internal_Shdr *shndx_hdr; |
| 1318 | Elf_Internal_Rela *internal_relocs; |
| 1319 | Elf_Internal_Rela *free_relocs = NULL; |
| 1320 | Elf_Internal_Rela *irel, *irelend; |
| 1321 | bfd_byte * contents = NULL; |
| 1322 | bfd_byte * free_contents = NULL; |
| 1323 | Elf32_External_Sym *extsyms = NULL; |
| 1324 | Elf32_External_Sym *free_extsyms = NULL; |
| 1325 | Elf_External_Sym_Shndx *shndx_buf = NULL; |
| 1326 | int machine; |
| 1327 | |
| 1328 | if (abfd == elf_hash_table (link_info)->dynobj |
| 1329 | && strcmp (sec->name, ".plt") == 0) |
| 1330 | return m32c_elf_relax_plt_section (abfd, sec, link_info, again); |
| 1331 | |
| 1332 | /* Assume nothing changes. */ |
| 1333 | *again = FALSE; |
| 1334 | |
| 1335 | machine = elf32_m32c_machine (abfd); |
| 1336 | |
| 1337 | /* We don't have to do anything for a relocatable link, if |
| 1338 | this section does not have relocs, or if this is not a |
| 1339 | code section. */ |
| 1340 | if (link_info->relocatable |
| 1341 | || (sec->flags & SEC_RELOC) == 0 |
| 1342 | || sec->reloc_count == 0 |
| 1343 | || (sec->flags & SEC_CODE) == 0) |
| 1344 | return TRUE; |
| 1345 | |
| 1346 | /* Relaxing doesn't quite work right yet. */ |
| 1347 | return TRUE; |
| 1348 | |
| 1349 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1350 | shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
| 1351 | |
| 1352 | /* Get a copy of the native relocations. */ |
| 1353 | internal_relocs = (_bfd_elf_link_read_relocs |
| 1354 | (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| 1355 | link_info->keep_memory)); |
| 1356 | if (internal_relocs == NULL) |
| 1357 | goto error_return; |
| 1358 | if (! link_info->keep_memory) |
| 1359 | free_relocs = internal_relocs; |
| 1360 | |
| 1361 | /* Walk through them looking for relaxing opportunities. */ |
| 1362 | irelend = internal_relocs + sec->reloc_count; |
| 1363 | |
| 1364 | for (irel = internal_relocs; irel < irelend; irel++) |
| 1365 | { |
| 1366 | bfd_vma symval; |
| 1367 | bfd_vma insn; |
| 1368 | bfd_vma pc; |
| 1369 | bfd_signed_vma pcrel_value; |
| 1370 | bfd_vma addend; |
| 1371 | int to_delete; |
| 1372 | int i; |
| 1373 | |
| 1374 | /* Get the section contents. */ |
| 1375 | if (contents == NULL) |
| 1376 | { |
| 1377 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 1378 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1379 | /* Go get them off disk. */ |
| 1380 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 1381 | goto error_return; |
| 1382 | } |
| 1383 | |
| 1384 | /* Read this BFD's symbols if we haven't done so already. */ |
| 1385 | if (extsyms == NULL) |
| 1386 | { |
| 1387 | /* Get cached copy if it exists. */ |
| 1388 | if (symtab_hdr->contents != NULL) |
| 1389 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; |
| 1390 | else |
| 1391 | { |
| 1392 | bfd_size_type amt = symtab_hdr->sh_size; |
| 1393 | |
| 1394 | /* Go get them off disk. */ |
| 1395 | extsyms = (Elf32_External_Sym *) bfd_malloc (amt); |
| 1396 | if (extsyms == NULL) |
| 1397 | goto error_return; |
| 1398 | free_extsyms = extsyms; |
| 1399 | if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| 1400 | || bfd_bread (extsyms, amt, abfd) != amt) |
| 1401 | goto error_return; |
| 1402 | symtab_hdr->contents = (bfd_byte *) extsyms; |
| 1403 | } |
| 1404 | |
| 1405 | if (shndx_hdr->sh_size != 0) |
| 1406 | { |
| 1407 | bfd_size_type amt; |
| 1408 | |
| 1409 | amt = symtab_hdr->sh_info; |
| 1410 | amt *= sizeof (Elf_External_Sym_Shndx); |
| 1411 | shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
| 1412 | if (shndx_buf == NULL) |
| 1413 | goto error_return; |
| 1414 | if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 |
| 1415 | || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt) |
| 1416 | goto error_return; |
| 1417 | shndx_hdr->contents = (bfd_byte *) shndx_buf; |
| 1418 | } |
| 1419 | } |
| 1420 | |
| 1421 | /* Get the value of the symbol referred to by the reloc. */ |
| 1422 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1423 | { |
| 1424 | /* A local symbol. */ |
| 1425 | Elf32_External_Sym *esym; |
| 1426 | Elf_External_Sym_Shndx *shndx; |
| 1427 | Elf_Internal_Sym isym; |
| 1428 | |
| 1429 | esym = extsyms + ELF32_R_SYM (irel->r_info); |
| 1430 | shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irel->r_info) : 0); |
| 1431 | bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym); |
| 1432 | |
| 1433 | symval = (isym.st_value |
| 1434 | + sec->output_section->vma |
| 1435 | + sec->output_offset); |
| 1436 | } |
| 1437 | else |
| 1438 | { |
| 1439 | unsigned long indx; |
| 1440 | struct elf_link_hash_entry *h; |
| 1441 | |
| 1442 | /* An external symbol. */ |
| 1443 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 1444 | h = elf_sym_hashes (abfd)[indx]; |
| 1445 | BFD_ASSERT (h != NULL); |
| 1446 | |
| 1447 | if (h->root.type != bfd_link_hash_defined |
| 1448 | && h->root.type != bfd_link_hash_defweak) |
| 1449 | /* This appears to be a reference to an undefined |
| 1450 | symbol. Just ignore it--it will be caught by the |
| 1451 | regular reloc processing. */ |
| 1452 | continue; |
| 1453 | |
| 1454 | symval = (h->root.u.def.value |
| 1455 | + h->root.u.def.section->output_section->vma |
| 1456 | + h->root.u.def.section->output_offset); |
| 1457 | } |
| 1458 | |
| 1459 | /* There will always be room for the relaxed insn, since it is smaller |
| 1460 | than the one it would replace. */ |
| 1461 | BFD_ASSERT (irel->r_offset <= sec->size - 2); |
| 1462 | |
| 1463 | insn = bfd_get_16 (abfd, contents + irel->r_offset + 0); |
| 1464 | |
| 1465 | addend = irel->r_addend; |
| 1466 | for (i = 0; relax_reloc[i].machine; i++) |
| 1467 | { |
| 1468 | #ifdef DEBUG |
| 1469 | _bfd_error_handler ("insn %x %d mask %x opcode %x =%x\n", |
| 1470 | insn, i, relax_reloc[i].opcode_mask, |
| 1471 | relax_reloc[i].opcode, |
| 1472 | (insn & relax_reloc[i].opcode_mask) == relax_reloc[i].opcode); |
| 1473 | #endif |
| 1474 | if (!(machine == relax_reloc[i].machine |
| 1475 | && (insn & relax_reloc[i].opcode_mask) == relax_reloc[i].opcode |
| 1476 | && (relax_reloc[i].old_reloc |
| 1477 | == (int) ELF32_R_TYPE(irel->r_info)))) |
| 1478 | continue; |
| 1479 | |
| 1480 | /* At this point we've confirmed we have a matching insn. Now |
| 1481 | ensure the operand is in range. */ |
| 1482 | if (relax_reloc[i].use_pcrel) |
| 1483 | { |
| 1484 | pc = sec->output_section->vma + sec->output_offset |
| 1485 | + irel->r_offset; |
| 1486 | pcrel_value = symval - pc; |
| 1487 | #ifndef USE_REL /* put in for learning purposes */ |
| 1488 | pcrel_value += addend; |
| 1489 | #else |
| 1490 | addend = bfd_get_signed_16 (abfd, contents + irel->r_offset + 2); |
| 1491 | pcrel_value += addend; |
| 1492 | #endif |
| 1493 | } |
| 1494 | else |
| 1495 | pcrel_value = symval; |
| 1496 | |
| 1497 | if (pcrel_value >= relax_reloc[i].relax_backward |
| 1498 | && pcrel_value < relax_reloc[i].relax_forward + 2) |
| 1499 | { |
| 1500 | /* We can relax to a shorter operand. */ |
| 1501 | insn = (insn & relax_reloc[i].mask) | relax_reloc[i].new_opcode; |
| 1502 | |
| 1503 | to_delete = relax_reloc[i].delete_n; |
| 1504 | |
| 1505 | /* Rewrite the insn. */ |
| 1506 | bfd_put_16 (abfd, insn, contents + irel->r_offset); |
| 1507 | |
| 1508 | /* Set the new reloc type. */ |
| 1509 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1510 | relax_reloc[i].new_reloc); |
| 1511 | irel->r_addend = pcrel_value; |
| 1512 | } |
| 1513 | else |
| 1514 | continue; |
| 1515 | |
| 1516 | #ifdef DEBUG |
| 1517 | _bfd_error_handler ("insn %x pc %x index %d mask %x shift %d delete %d\n" |
| 1518 | "old reloc %s new reloc %s", |
| 1519 | insn, sec->output_section->vma |
| 1520 | + sec->output_offset + irel->r_offset + 2, |
| 1521 | i, relax_reloc[i].opcode_mask, |
| 1522 | relax_reloc[i].value_shift, to_delete, |
| 1523 | m32c_get_reloc (relax_reloc[i].old_reloc), |
| 1524 | m32c_get_reloc (relax_reloc[i].new_reloc)); |
| 1525 | #endif |
| 1526 | |
| 1527 | /* Note that we've changed the relocs, section contents, etc. */ |
| 1528 | elf_section_data (sec)->relocs = internal_relocs; |
| 1529 | free_relocs = NULL; |
| 1530 | |
| 1531 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1532 | free_contents = NULL; |
| 1533 | |
| 1534 | symtab_hdr->contents = (bfd_byte *) extsyms; |
| 1535 | free_extsyms = NULL; |
| 1536 | |
| 1537 | /* Delete TO_DELETE bytes of data. */ |
| 1538 | if (! m32c_elf_relax_delete_bytes |
| 1539 | (abfd, sec, irel->r_offset + relax_reloc[i].value_shift, |
| 1540 | to_delete)) |
| 1541 | goto error_return; |
| 1542 | } /* next relax_reloc */ |
| 1543 | } /* next relocation */ |
| 1544 | |
| 1545 | if (free_relocs != NULL) |
| 1546 | { |
| 1547 | free (free_relocs); |
| 1548 | free_relocs = NULL; |
| 1549 | } |
| 1550 | |
| 1551 | if (free_contents != NULL) |
| 1552 | { |
| 1553 | if (! link_info->keep_memory) |
| 1554 | free (free_contents); |
| 1555 | /* Cache the section contents for elf_link_input_bfd. */ |
| 1556 | else |
| 1557 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1558 | |
| 1559 | free_contents = NULL; |
| 1560 | } |
| 1561 | |
| 1562 | if (shndx_buf != NULL) |
| 1563 | { |
| 1564 | shndx_hdr->contents = NULL; |
| 1565 | free (shndx_buf); |
| 1566 | } |
| 1567 | |
| 1568 | if (free_extsyms != NULL) |
| 1569 | { |
| 1570 | if (! link_info->keep_memory) |
| 1571 | free (free_extsyms); |
| 1572 | /* Cache the symbols for elf_link_input_bfd. */ |
| 1573 | else |
| 1574 | symtab_hdr->contents = NULL /* (unsigned char *) extsyms*/; |
| 1575 | |
| 1576 | free_extsyms = NULL; |
| 1577 | } |
| 1578 | /* elf_link_input_bfd expects internal syms. */ |
| 1579 | symtab_hdr->contents = NULL; |
| 1580 | |
| 1581 | return TRUE; |
| 1582 | |
| 1583 | error_return: |
| 1584 | if (free_relocs != NULL) |
| 1585 | free (free_relocs); |
| 1586 | if (free_contents != NULL) |
| 1587 | free (free_contents); |
| 1588 | if (shndx_buf != NULL) |
| 1589 | { |
| 1590 | shndx_hdr->contents = NULL; |
| 1591 | free (shndx_buf); |
| 1592 | } |
| 1593 | if (free_extsyms != NULL) |
| 1594 | free (free_extsyms); |
| 1595 | return FALSE; |
| 1596 | } |
| 1597 | |
| 1598 | /* Delete some bytes from a section while relaxing. */ |
| 1599 | |
| 1600 | static bfd_boolean |
| 1601 | m32c_elf_relax_delete_bytes |
| 1602 | (bfd * abfd, |
| 1603 | asection * sec, |
| 1604 | bfd_vma addr, |
| 1605 | int count) |
| 1606 | { |
| 1607 | Elf_Internal_Shdr *symtab_hdr; |
| 1608 | Elf_Internal_Shdr *shndx_hdr; |
| 1609 | int sec_shndx; |
| 1610 | bfd_byte *contents; |
| 1611 | Elf_Internal_Rela *irel; |
| 1612 | Elf_Internal_Rela *irelend; |
| 1613 | Elf_Internal_Rela *irelalign; |
| 1614 | bfd_vma toaddr; |
| 1615 | Elf32_External_Sym *esym; |
| 1616 | Elf32_External_Sym *esymend; |
| 1617 | Elf32_External_Sym *extsyms; |
| 1618 | Elf_External_Sym_Shndx *shndx_buf; |
| 1619 | Elf_External_Sym_Shndx *shndx; |
| 1620 | struct elf_link_hash_entry ** sym_hashes; |
| 1621 | struct elf_link_hash_entry ** end_hashes; |
| 1622 | unsigned int symcount; |
| 1623 | |
| 1624 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 1625 | extsyms = (Elf32_External_Sym *) symtab_hdr->contents; |
| 1626 | shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr; |
| 1627 | shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents; |
| 1628 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1629 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1630 | |
| 1631 | /* The deletion must stop at the next ALIGN reloc for an aligment |
| 1632 | power larger than the number of bytes we are deleting. */ |
| 1633 | irelalign = NULL; |
| 1634 | toaddr = sec->size; |
| 1635 | |
| 1636 | irel = elf_section_data (sec)->relocs; |
| 1637 | irelend = irel + sec->reloc_count; |
| 1638 | |
| 1639 | /* Actually delete the bytes. */ |
| 1640 | memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count)); |
| 1641 | sec->size -= count; |
| 1642 | |
| 1643 | /* Adjust all the relocs. */ |
| 1644 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++) |
| 1645 | { |
| 1646 | /* Get the new reloc address. */ |
| 1647 | if (irel->r_offset > addr && irel->r_offset < toaddr) |
| 1648 | irel->r_offset -= count; |
| 1649 | if (irel->r_addend > addr && irel->r_addend < toaddr) |
| 1650 | irel->r_addend -= count; |
| 1651 | } |
| 1652 | |
| 1653 | /* Adjust the local symbols defined in this section. */ |
| 1654 | shndx = shndx_buf; |
| 1655 | esym = extsyms; |
| 1656 | esymend = esym + symtab_hdr->sh_info; |
| 1657 | for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL)) |
| 1658 | { |
| 1659 | Elf_Internal_Sym isym; |
| 1660 | Elf_External_Sym_Shndx dummy; |
| 1661 | |
| 1662 | bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym); |
| 1663 | |
| 1664 | if ((int) isym.st_shndx == sec_shndx |
| 1665 | && isym.st_value > addr |
| 1666 | && isym.st_value < toaddr) |
| 1667 | { |
| 1668 | isym.st_value -= count; |
| 1669 | bfd_elf32_swap_symbol_out (abfd, &isym, (PTR) esym, (PTR) & dummy); |
| 1670 | } |
| 1671 | } |
| 1672 | |
| 1673 | /* Now adjust the global symbols defined in this section. */ |
| 1674 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1675 | - symtab_hdr->sh_info); |
| 1676 | sym_hashes = elf_sym_hashes (abfd); |
| 1677 | // sym_hashes += symtab_hdr->sh_info; |
| 1678 | end_hashes = sym_hashes + symcount; |
| 1679 | |
| 1680 | for (; sym_hashes < end_hashes; sym_hashes ++) |
| 1681 | { |
| 1682 | struct elf_link_hash_entry * sym_hash = * sym_hashes; |
| 1683 | |
| 1684 | if (sym_hash && |
| 1685 | ( sym_hash->root.type == bfd_link_hash_defined |
| 1686 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1687 | && sym_hash->root.u.def.section == sec |
| 1688 | && sym_hash->root.u.def.value > addr |
| 1689 | && sym_hash->root.u.def.value < toaddr) |
| 1690 | sym_hash->root.u.def.value -= count; |
| 1691 | } |
| 1692 | |
| 1693 | return TRUE; |
| 1694 | } |
| 1695 | \f |
| 1696 | |
| 1697 | #define ELF_ARCH bfd_arch_m32c |
| 1698 | #define ELF_MACHINE_CODE EM_M32C |
| 1699 | #define ELF_MAXPAGESIZE 0x1000 |
| 1700 | |
| 1701 | #if 0 |
| 1702 | #define TARGET_BIG_SYM bfd_elf32_m32c_vec |
| 1703 | #define TARGET_BIG_NAME "elf32-m32c" |
| 1704 | #else |
| 1705 | #define TARGET_LITTLE_SYM bfd_elf32_m32c_vec |
| 1706 | #define TARGET_LITTLE_NAME "elf32-m32c" |
| 1707 | #endif |
| 1708 | |
| 1709 | #define elf_info_to_howto_rel NULL |
| 1710 | #define elf_info_to_howto m32c_info_to_howto_rela |
| 1711 | #define elf_backend_object_p m32c_elf_object_p |
| 1712 | #define elf_backend_relocate_section m32c_elf_relocate_section |
| 1713 | #define elf_backend_gc_mark_hook m32c_elf_gc_mark_hook |
| 1714 | #define elf_backend_gc_sweep_hook m32c_elf_gc_sweep_hook |
| 1715 | #define elf_backend_check_relocs m32c_elf_check_relocs |
| 1716 | #define elf_backend_object_p m32c_elf_object_p |
| 1717 | #define elf_symbol_leading_char ('_') |
| 1718 | #define elf_backend_always_size_sections \ |
| 1719 | m32c_elf_always_size_sections |
| 1720 | #define elf_backend_finish_dynamic_sections \ |
| 1721 | m32c_elf_finish_dynamic_sections |
| 1722 | |
| 1723 | #define elf_backend_can_gc_sections 1 |
| 1724 | |
| 1725 | #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup |
| 1726 | #define bfd_elf32_bfd_relax_section m32c_elf_relax_section |
| 1727 | #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags |
| 1728 | #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data |
| 1729 | #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data |
| 1730 | |
| 1731 | #include "elf32-target.h" |