| 1 | /* BFD back-end for Motorola 68000 COFF binaries. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999, |
| 3 | 2000, 2001, 2002, 2003, 2005, 2007, 2008 |
| 4 | Free Software Foundation, Inc. |
| 5 | Written by Cygnus Support. |
| 6 | |
| 7 | This file is part of BFD, the Binary File Descriptor library. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 22 | MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include "bfd.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "coff/m68k.h" |
| 28 | #include "coff/internal.h" |
| 29 | #include "libcoff.h" |
| 30 | |
| 31 | /* This source file is compiled multiple times for various m68k COFF |
| 32 | variants. The following macros control its behaviour: |
| 33 | |
| 34 | TARGET_SYM |
| 35 | The C name of the BFD target vector. The default is m68kcoff_vec. |
| 36 | TARGET_NAME |
| 37 | The user visible target name. The default is "coff-m68k". |
| 38 | NAMES_HAVE_UNDERSCORE |
| 39 | Whether symbol names have an underscore. |
| 40 | ONLY_DECLARE_RELOCS |
| 41 | Only declare the relocation howto array. Don't actually compile |
| 42 | it. The actual array will be picked up in another version of the |
| 43 | file. |
| 44 | STATIC_RELOCS |
| 45 | Make the relocation howto array, and associated functions, static. |
| 46 | COFF_COMMON_ADDEND |
| 47 | If this is defined, then, for a relocation against a common |
| 48 | symbol, the object file holds the value (the size) of the common |
| 49 | symbol. If this is not defined, then, for a relocation against a |
| 50 | common symbol, the object file holds zero. */ |
| 51 | |
| 52 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
| 53 | |
| 54 | #ifndef COFF_PAGE_SIZE |
| 55 | /* The page size is a guess based on ELF. */ |
| 56 | #define COFF_PAGE_SIZE 0x2000 |
| 57 | #endif |
| 58 | |
| 59 | #ifndef COFF_COMMON_ADDEND |
| 60 | #define RELOC_SPECIAL_FN 0 |
| 61 | #else |
| 62 | static bfd_reloc_status_type m68kcoff_common_addend_special_fn |
| 63 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 64 | static reloc_howto_type *m68kcoff_common_addend_rtype_to_howto |
| 65 | PARAMS ((bfd *, asection *, struct internal_reloc *, |
| 66 | struct coff_link_hash_entry *, struct internal_syment *, |
| 67 | bfd_vma *)); |
| 68 | #define RELOC_SPECIAL_FN m68kcoff_common_addend_special_fn |
| 69 | #endif |
| 70 | |
| 71 | static bfd_boolean m68k_coff_is_local_label_name |
| 72 | PARAMS ((bfd *, const char *)); |
| 73 | |
| 74 | /* On the delta, a symbol starting with L% is local. We won't see |
| 75 | such a symbol on other platforms, so it should be safe to always |
| 76 | consider it local here. */ |
| 77 | |
| 78 | static bfd_boolean |
| 79 | m68k_coff_is_local_label_name (abfd, name) |
| 80 | bfd *abfd; |
| 81 | const char *name; |
| 82 | { |
| 83 | if (name[0] == 'L' && name[1] == '%') |
| 84 | return TRUE; |
| 85 | |
| 86 | return _bfd_coff_is_local_label_name (abfd, name); |
| 87 | } |
| 88 | |
| 89 | #ifndef STATIC_RELOCS |
| 90 | /* Clean up namespace. */ |
| 91 | #define m68kcoff_howto_table _bfd_m68kcoff_howto_table |
| 92 | #define m68k_rtype2howto _bfd_m68kcoff_rtype2howto |
| 93 | #define m68k_howto2rtype _bfd_m68kcoff_howto2rtype |
| 94 | #define m68k_reloc_type_lookup _bfd_m68kcoff_reloc_type_lookup |
| 95 | #define m68k_reloc_name_lookup _bfd_m68kcoff_reloc_name_lookup |
| 96 | #endif |
| 97 | |
| 98 | #ifdef ONLY_DECLARE_RELOCS |
| 99 | extern reloc_howto_type m68kcoff_howto_table[]; |
| 100 | #else |
| 101 | #ifdef STATIC_RELOCS |
| 102 | static |
| 103 | #endif |
| 104 | reloc_howto_type m68kcoff_howto_table[] = |
| 105 | { |
| 106 | HOWTO (R_RELBYTE, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "8", TRUE, 0x000000ff,0x000000ff, FALSE), |
| 107 | HOWTO (R_RELWORD, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "16", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
| 108 | HOWTO (R_RELLONG, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "32", TRUE, 0xffffffff,0xffffffff, FALSE), |
| 109 | HOWTO (R_PCRBYTE, 0, 0, 8, TRUE, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP8", TRUE, 0x000000ff,0x000000ff, FALSE), |
| 110 | HOWTO (R_PCRWORD, 0, 1, 16, TRUE, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE), |
| 111 | HOWTO (R_PCRLONG, 0, 2, 32, TRUE, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP32", TRUE, 0xffffffff,0xffffffff, FALSE), |
| 112 | HOWTO (R_RELLONG_NEG, 0, -2, 32, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "-32", TRUE, 0xffffffff,0xffffffff, FALSE), |
| 113 | }; |
| 114 | #endif /* not ONLY_DECLARE_RELOCS */ |
| 115 | |
| 116 | #ifndef BADMAG |
| 117 | #define BADMAG(x) M68KBADMAG(x) |
| 118 | #endif |
| 119 | #define M68 1 /* Customize coffcode.h */ |
| 120 | |
| 121 | /* Turn a howto into a reloc number */ |
| 122 | |
| 123 | #ifdef ONLY_DECLARE_RELOCS |
| 124 | extern void m68k_rtype2howto PARAMS ((arelent *internal, int relocentry)); |
| 125 | extern int m68k_howto2rtype PARAMS ((reloc_howto_type *)); |
| 126 | extern reloc_howto_type *m68k_reloc_type_lookup |
| 127 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 128 | extern reloc_howto_type *m68k_reloc_name_lookup |
| 129 | PARAMS ((bfd *, const char *)); |
| 130 | #else |
| 131 | |
| 132 | #ifdef STATIC_RELOCS |
| 133 | #define STAT_REL static |
| 134 | #else |
| 135 | #define STAT_REL |
| 136 | #endif |
| 137 | |
| 138 | STAT_REL reloc_howto_type * m68k_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 139 | STAT_REL reloc_howto_type * m68k_reloc_name_lookup PARAMS ((bfd *, const char *)); |
| 140 | STAT_REL int m68k_howto2rtype PARAMS ((reloc_howto_type *)); |
| 141 | STAT_REL void m68k_rtype2howto PARAMS ((arelent *, int)); |
| 142 | |
| 143 | |
| 144 | STAT_REL void |
| 145 | m68k_rtype2howto(internal, relocentry) |
| 146 | arelent *internal; |
| 147 | int relocentry; |
| 148 | { |
| 149 | switch (relocentry) |
| 150 | { |
| 151 | case R_RELBYTE: internal->howto = m68kcoff_howto_table + 0; break; |
| 152 | case R_RELWORD: internal->howto = m68kcoff_howto_table + 1; break; |
| 153 | case R_RELLONG: internal->howto = m68kcoff_howto_table + 2; break; |
| 154 | case R_PCRBYTE: internal->howto = m68kcoff_howto_table + 3; break; |
| 155 | case R_PCRWORD: internal->howto = m68kcoff_howto_table + 4; break; |
| 156 | case R_PCRLONG: internal->howto = m68kcoff_howto_table + 5; break; |
| 157 | case R_RELLONG_NEG: internal->howto = m68kcoff_howto_table + 6; break; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | STAT_REL int |
| 162 | m68k_howto2rtype (internal) |
| 163 | reloc_howto_type *internal; |
| 164 | { |
| 165 | if (internal->pc_relative) |
| 166 | { |
| 167 | switch (internal->bitsize) |
| 168 | { |
| 169 | case 32: return R_PCRLONG; |
| 170 | case 16: return R_PCRWORD; |
| 171 | case 8: return R_PCRBYTE; |
| 172 | } |
| 173 | } |
| 174 | else |
| 175 | { |
| 176 | switch (internal->bitsize) |
| 177 | { |
| 178 | case 32: return R_RELLONG; |
| 179 | case 16: return R_RELWORD; |
| 180 | case 8: return R_RELBYTE; |
| 181 | } |
| 182 | } |
| 183 | return R_RELLONG; |
| 184 | } |
| 185 | |
| 186 | STAT_REL reloc_howto_type * |
| 187 | m68k_reloc_type_lookup (abfd, code) |
| 188 | bfd *abfd ATTRIBUTE_UNUSED; |
| 189 | bfd_reloc_code_real_type code; |
| 190 | { |
| 191 | switch (code) |
| 192 | { |
| 193 | default: return NULL; |
| 194 | case BFD_RELOC_8: return m68kcoff_howto_table + 0; |
| 195 | case BFD_RELOC_16: return m68kcoff_howto_table + 1; |
| 196 | case BFD_RELOC_CTOR: |
| 197 | case BFD_RELOC_32: return m68kcoff_howto_table + 2; |
| 198 | case BFD_RELOC_8_PCREL: return m68kcoff_howto_table + 3; |
| 199 | case BFD_RELOC_16_PCREL: return m68kcoff_howto_table + 4; |
| 200 | case BFD_RELOC_32_PCREL: return m68kcoff_howto_table + 5; |
| 201 | /* FIXME: There doesn't seem to be a code for R_RELLONG_NEG. */ |
| 202 | } |
| 203 | /*NOTREACHED*/ |
| 204 | } |
| 205 | |
| 206 | STAT_REL reloc_howto_type * |
| 207 | m68k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 208 | const char *r_name) |
| 209 | { |
| 210 | unsigned int i; |
| 211 | |
| 212 | for (i = 0; |
| 213 | i < sizeof (m68kcoff_howto_table) / sizeof (m68kcoff_howto_table[0]); |
| 214 | i++) |
| 215 | if (m68kcoff_howto_table[i].name != NULL |
| 216 | && strcasecmp (m68kcoff_howto_table[i].name, r_name) == 0) |
| 217 | return &m68kcoff_howto_table[i]; |
| 218 | |
| 219 | return NULL; |
| 220 | } |
| 221 | |
| 222 | #endif /* not ONLY_DECLARE_RELOCS */ |
| 223 | |
| 224 | #define RTYPE2HOWTO(internal, relocentry) \ |
| 225 | m68k_rtype2howto(internal, (relocentry)->r_type) |
| 226 | |
| 227 | #define SELECT_RELOC(external, internal) \ |
| 228 | external.r_type = m68k_howto2rtype (internal) |
| 229 | |
| 230 | #define coff_bfd_reloc_type_lookup m68k_reloc_type_lookup |
| 231 | #define coff_bfd_reloc_name_lookup m68k_reloc_name_lookup |
| 232 | |
| 233 | #ifndef COFF_COMMON_ADDEND |
| 234 | #ifndef coff_rtype_to_howto |
| 235 | |
| 236 | #define coff_rtype_to_howto m68kcoff_rtype_to_howto |
| 237 | |
| 238 | static reloc_howto_type *m68kcoff_rtype_to_howto |
| 239 | PARAMS ((bfd *, asection *, struct internal_reloc *, |
| 240 | struct coff_link_hash_entry *, struct internal_syment *, |
| 241 | bfd_vma *)); |
| 242 | |
| 243 | static reloc_howto_type * |
| 244 | m68kcoff_rtype_to_howto (abfd, sec, rel, h, sym, addendp) |
| 245 | bfd *abfd ATTRIBUTE_UNUSED; |
| 246 | asection *sec; |
| 247 | struct internal_reloc *rel; |
| 248 | struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; |
| 249 | struct internal_syment *sym ATTRIBUTE_UNUSED; |
| 250 | bfd_vma *addendp; |
| 251 | { |
| 252 | arelent relent; |
| 253 | reloc_howto_type *howto; |
| 254 | |
| 255 | relent.howto = NULL; |
| 256 | RTYPE2HOWTO (&relent, rel); |
| 257 | |
| 258 | howto = relent.howto; |
| 259 | |
| 260 | if (howto != NULL && howto->pc_relative) |
| 261 | *addendp += sec->vma; |
| 262 | |
| 263 | return howto; |
| 264 | } |
| 265 | |
| 266 | #endif /* ! defined (coff_rtype_to_howto) */ |
| 267 | #endif /* ! defined (COFF_COMMON_ADDEND) */ |
| 268 | \f |
| 269 | #ifdef COFF_COMMON_ADDEND |
| 270 | |
| 271 | /* If COFF_COMMON_ADDEND is defined, then when using m68k COFF the |
| 272 | value stored in the .text section for a reference to a common |
| 273 | symbol is the value itself plus any desired offset. (taken from |
| 274 | work done by Ian Taylor, Cygnus Support, for I386 COFF). */ |
| 275 | |
| 276 | /* If we are producing relocatable output, we need to do some |
| 277 | adjustments to the object file that are not done by the |
| 278 | bfd_perform_relocation function. This function is called by every |
| 279 | reloc type to make any required adjustments. */ |
| 280 | |
| 281 | static bfd_reloc_status_type |
| 282 | m68kcoff_common_addend_special_fn (abfd, reloc_entry, symbol, data, |
| 283 | input_section, output_bfd, error_message) |
| 284 | bfd *abfd; |
| 285 | arelent *reloc_entry; |
| 286 | asymbol *symbol; |
| 287 | PTR data; |
| 288 | asection *input_section ATTRIBUTE_UNUSED; |
| 289 | bfd *output_bfd; |
| 290 | char **error_message ATTRIBUTE_UNUSED; |
| 291 | { |
| 292 | symvalue diff; |
| 293 | |
| 294 | if (output_bfd == (bfd *) NULL) |
| 295 | return bfd_reloc_continue; |
| 296 | |
| 297 | if (bfd_is_com_section (symbol->section)) |
| 298 | { |
| 299 | /* We are relocating a common symbol. The current value in the |
| 300 | object file is ORIG + OFFSET, where ORIG is the value of the |
| 301 | common symbol as seen by the object file when it was compiled |
| 302 | (this may be zero if the symbol was undefined) and OFFSET is |
| 303 | the offset into the common symbol (normally zero, but may be |
| 304 | non-zero when referring to a field in a common structure). |
| 305 | ORIG is the negative of reloc_entry->addend, which is set by |
| 306 | the CALC_ADDEND macro below. We want to replace the value in |
| 307 | the object file with NEW + OFFSET, where NEW is the value of |
| 308 | the common symbol which we are going to put in the final |
| 309 | object file. NEW is symbol->value. */ |
| 310 | diff = symbol->value + reloc_entry->addend; |
| 311 | } |
| 312 | else |
| 313 | { |
| 314 | /* For some reason bfd_perform_relocation always effectively |
| 315 | ignores the addend for a COFF target when producing |
| 316 | relocatable output. This seems to be always wrong for 386 |
| 317 | COFF, so we handle the addend here instead. */ |
| 318 | diff = reloc_entry->addend; |
| 319 | } |
| 320 | |
| 321 | #define DOIT(x) \ |
| 322 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) |
| 323 | |
| 324 | if (diff != 0) |
| 325 | { |
| 326 | reloc_howto_type *howto = reloc_entry->howto; |
| 327 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; |
| 328 | |
| 329 | switch (howto->size) |
| 330 | { |
| 331 | case 0: |
| 332 | { |
| 333 | char x = bfd_get_8 (abfd, addr); |
| 334 | DOIT (x); |
| 335 | bfd_put_8 (abfd, x, addr); |
| 336 | } |
| 337 | break; |
| 338 | |
| 339 | case 1: |
| 340 | { |
| 341 | short x = bfd_get_16 (abfd, addr); |
| 342 | DOIT (x); |
| 343 | bfd_put_16 (abfd, (bfd_vma) x, addr); |
| 344 | } |
| 345 | break; |
| 346 | |
| 347 | case 2: |
| 348 | { |
| 349 | long x = bfd_get_32 (abfd, addr); |
| 350 | DOIT (x); |
| 351 | bfd_put_32 (abfd, (bfd_vma) x, addr); |
| 352 | } |
| 353 | break; |
| 354 | |
| 355 | default: |
| 356 | abort (); |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | /* Now let bfd_perform_relocation finish everything up. */ |
| 361 | return bfd_reloc_continue; |
| 362 | } |
| 363 | |
| 364 | /* Compute the addend of a reloc. If the reloc is to a common symbol, |
| 365 | the object file contains the value of the common symbol. By the |
| 366 | time this is called, the linker may be using a different symbol |
| 367 | from a different object file with a different value. Therefore, we |
| 368 | hack wildly to locate the original symbol from this file so that we |
| 369 | can make the correct adjustment. This macro sets coffsym to the |
| 370 | symbol from the original file, and uses it to set the addend value |
| 371 | correctly. If this is not a common symbol, the usual addend |
| 372 | calculation is done, except that an additional tweak is needed for |
| 373 | PC relative relocs. |
| 374 | FIXME: This macro refers to symbols and asect; these are from the |
| 375 | calling function, not the macro arguments. */ |
| 376 | |
| 377 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ |
| 378 | { \ |
| 379 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ |
| 380 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ |
| 381 | coffsym = (obj_symbols (abfd) \ |
| 382 | + (cache_ptr->sym_ptr_ptr - symbols)); \ |
| 383 | else if (ptr) \ |
| 384 | coffsym = coff_symbol_from (abfd, ptr); \ |
| 385 | if (coffsym != (coff_symbol_type *) NULL \ |
| 386 | && coffsym->native->u.syment.n_scnum == 0) \ |
| 387 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ |
| 388 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ |
| 389 | && ptr->section != (asection *) NULL) \ |
| 390 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ |
| 391 | else \ |
| 392 | cache_ptr->addend = 0; \ |
| 393 | if (ptr && (reloc.r_type == R_PCRBYTE \ |
| 394 | || reloc.r_type == R_PCRWORD \ |
| 395 | || reloc.r_type == R_PCRLONG)) \ |
| 396 | cache_ptr->addend += asect->vma; \ |
| 397 | } |
| 398 | |
| 399 | #ifndef coff_rtype_to_howto |
| 400 | |
| 401 | /* coff-m68k.c uses the special COFF backend linker. We need to |
| 402 | adjust common symbols. */ |
| 403 | |
| 404 | static reloc_howto_type * |
| 405 | m68kcoff_common_addend_rtype_to_howto (abfd, sec, rel, h, sym, addendp) |
| 406 | bfd *abfd ATTRIBUTE_UNUSED; |
| 407 | asection *sec; |
| 408 | struct internal_reloc *rel; |
| 409 | struct coff_link_hash_entry *h; |
| 410 | struct internal_syment *sym; |
| 411 | bfd_vma *addendp; |
| 412 | { |
| 413 | arelent relent; |
| 414 | reloc_howto_type *howto; |
| 415 | |
| 416 | relent.howto = NULL; |
| 417 | RTYPE2HOWTO (&relent, rel); |
| 418 | |
| 419 | howto = relent.howto; |
| 420 | |
| 421 | if (howto->pc_relative) |
| 422 | *addendp += sec->vma; |
| 423 | |
| 424 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) |
| 425 | { |
| 426 | /* This is a common symbol. The section contents include the |
| 427 | size (sym->n_value) as an addend. The relocate_section |
| 428 | function will be adding in the final value of the symbol. We |
| 429 | need to subtract out the current size in order to get the |
| 430 | correct result. */ |
| 431 | BFD_ASSERT (h != NULL); |
| 432 | *addendp -= sym->n_value; |
| 433 | } |
| 434 | |
| 435 | /* If the output symbol is common (in which case this must be a |
| 436 | relocatable link), we need to add in the final size of the |
| 437 | common symbol. */ |
| 438 | if (h != NULL && h->root.type == bfd_link_hash_common) |
| 439 | *addendp += h->root.u.c.size; |
| 440 | |
| 441 | return howto; |
| 442 | } |
| 443 | |
| 444 | #define coff_rtype_to_howto m68kcoff_common_addend_rtype_to_howto |
| 445 | |
| 446 | #endif /* ! defined (coff_rtype_to_howto) */ |
| 447 | |
| 448 | #endif /* COFF_COMMON_ADDEND */ |
| 449 | |
| 450 | #if !defined ONLY_DECLARE_RELOCS && ! defined STATIC_RELOCS |
| 451 | /* Given a .data section and a .emreloc in-memory section, store |
| 452 | relocation information into the .emreloc section which can be |
| 453 | used at runtime to relocate the section. This is called by the |
| 454 | linker when the --embedded-relocs switch is used. This is called |
| 455 | after the add_symbols entry point has been called for all the |
| 456 | objects, and before the final_link entry point is called. */ |
| 457 | |
| 458 | bfd_boolean |
| 459 | bfd_m68k_coff_create_embedded_relocs (abfd, info, datasec, relsec, errmsg) |
| 460 | bfd *abfd; |
| 461 | struct bfd_link_info *info; |
| 462 | asection *datasec; |
| 463 | asection *relsec; |
| 464 | char **errmsg; |
| 465 | { |
| 466 | char *extsyms; |
| 467 | bfd_size_type symesz; |
| 468 | struct internal_reloc *irel, *irelend; |
| 469 | bfd_byte *p; |
| 470 | bfd_size_type amt; |
| 471 | |
| 472 | BFD_ASSERT (! info->relocatable); |
| 473 | |
| 474 | *errmsg = NULL; |
| 475 | |
| 476 | if (datasec->reloc_count == 0) |
| 477 | return TRUE; |
| 478 | |
| 479 | extsyms = obj_coff_external_syms (abfd); |
| 480 | symesz = bfd_coff_symesz (abfd); |
| 481 | |
| 482 | irel = _bfd_coff_read_internal_relocs (abfd, datasec, TRUE, NULL, FALSE, |
| 483 | NULL); |
| 484 | irelend = irel + datasec->reloc_count; |
| 485 | |
| 486 | amt = (bfd_size_type) datasec->reloc_count * 12; |
| 487 | relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt); |
| 488 | if (relsec->contents == NULL) |
| 489 | return FALSE; |
| 490 | |
| 491 | p = relsec->contents; |
| 492 | |
| 493 | for (; irel < irelend; irel++, p += 12) |
| 494 | { |
| 495 | asection *targetsec; |
| 496 | |
| 497 | /* We are going to write a four byte longword into the runtime |
| 498 | reloc section. The longword will be the address in the data |
| 499 | section which must be relocated. It is followed by the name |
| 500 | of the target section NUL-padded or truncated to 8 |
| 501 | characters. */ |
| 502 | |
| 503 | /* We can only relocate absolute longword relocs at run time. */ |
| 504 | if (irel->r_type != R_RELLONG) |
| 505 | { |
| 506 | *errmsg = _("unsupported reloc type"); |
| 507 | bfd_set_error (bfd_error_bad_value); |
| 508 | return FALSE; |
| 509 | } |
| 510 | |
| 511 | if (irel->r_symndx == -1) |
| 512 | targetsec = bfd_abs_section_ptr; |
| 513 | else |
| 514 | { |
| 515 | struct coff_link_hash_entry *h; |
| 516 | |
| 517 | h = obj_coff_sym_hashes (abfd)[irel->r_symndx]; |
| 518 | if (h == NULL) |
| 519 | { |
| 520 | struct internal_syment isym; |
| 521 | |
| 522 | bfd_coff_swap_sym_in (abfd, extsyms + symesz * irel->r_symndx, |
| 523 | &isym); |
| 524 | targetsec = coff_section_from_bfd_index (abfd, isym.n_scnum); |
| 525 | } |
| 526 | else if (h->root.type == bfd_link_hash_defined |
| 527 | || h->root.type == bfd_link_hash_defweak) |
| 528 | targetsec = h->root.u.def.section; |
| 529 | else |
| 530 | targetsec = NULL; |
| 531 | } |
| 532 | |
| 533 | bfd_put_32 (abfd, |
| 534 | (irel->r_vaddr - datasec->vma + datasec->output_offset), p); |
| 535 | memset (p + 4, 0, 8); |
| 536 | if (targetsec != NULL) |
| 537 | strncpy ((char *) p + 4, targetsec->output_section->name, 8); |
| 538 | } |
| 539 | |
| 540 | return TRUE; |
| 541 | } |
| 542 | #endif /* neither ONLY_DECLARE_RELOCS not STATIC_RELOCS */ |
| 543 | \f |
| 544 | #define coff_bfd_is_local_label_name m68k_coff_is_local_label_name |
| 545 | |
| 546 | #define coff_relocate_section _bfd_coff_generic_relocate_section |
| 547 | |
| 548 | #ifndef bfd_pe_print_pdata |
| 549 | #define bfd_pe_print_pdata NULL |
| 550 | #endif |
| 551 | |
| 552 | #include "coffcode.h" |
| 553 | |
| 554 | #ifndef TARGET_SYM |
| 555 | #define TARGET_SYM m68kcoff_vec |
| 556 | #endif |
| 557 | |
| 558 | #ifndef TARGET_NAME |
| 559 | #define TARGET_NAME "coff-m68k" |
| 560 | #endif |
| 561 | |
| 562 | #ifdef NAMES_HAVE_UNDERSCORE |
| 563 | CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE) |
| 564 | #else |
| 565 | CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, 0, NULL, COFF_SWAP_TABLE) |
| 566 | #endif |