| 1 | /* BFD back-end for MIPS PE COFF files. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
| 3 | 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
| 4 | Modified from coff-i386.c by DJ Delorie, dj@cygnus.com |
| 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #define COFF_WITH_PE |
| 23 | #define COFF_LONG_SECTION_NAMES |
| 24 | #define PCRELOFFSET TRUE |
| 25 | |
| 26 | #include "bfd.h" |
| 27 | #include "sysdep.h" |
| 28 | #include "libbfd.h" |
| 29 | |
| 30 | #include "coff/mipspe.h" |
| 31 | |
| 32 | #include "coff/internal.h" |
| 33 | |
| 34 | #include "coff/pe.h" |
| 35 | |
| 36 | #include "libcoff.h" |
| 37 | |
| 38 | static bfd_reloc_status_type coff_mips_reloc |
| 39 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 40 | static reloc_howto_type *coff_mips_rtype_to_howto |
| 41 | PARAMS ((bfd *, asection *, struct internal_reloc *, |
| 42 | struct coff_link_hash_entry *, struct internal_syment *, |
| 43 | bfd_vma *)); |
| 44 | #if 0 |
| 45 | static void mips_ecoff_swap_reloc_in |
| 46 | PARAMS ((bfd *, PTR, struct internal_reloc *)); |
| 47 | static void mips_ecoff_swap_reloc_out |
| 48 | PARAMS ((bfd *, const struct internal_reloc *, PTR)); |
| 49 | static void mips_adjust_reloc_in |
| 50 | PARAMS ((bfd *, const struct internal_reloc *, arelent *)); |
| 51 | static void mips_adjust_reloc_out |
| 52 | PARAMS ((bfd *, const arelent *, struct internal_reloc *)); |
| 53 | #endif |
| 54 | |
| 55 | static bfd_boolean in_reloc_p |
| 56 | PARAMS ((bfd *, reloc_howto_type *)); |
| 57 | static reloc_howto_type * coff_mips_reloc_type_lookup |
| 58 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 59 | static void mips_swap_reloc_in |
| 60 | PARAMS ((bfd *, PTR, PTR)); |
| 61 | static unsigned int mips_swap_reloc_out |
| 62 | PARAMS ((bfd *, PTR, PTR)); |
| 63 | static bfd_boolean coff_pe_mips_relocate_section |
| 64 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 65 | struct internal_reloc *, struct internal_syment *, asection **)); |
| 66 | |
| 67 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
| 68 | /* The page size is a guess based on ELF. */ |
| 69 | |
| 70 | #define COFF_PAGE_SIZE 0x1000 |
| 71 | |
| 72 | /* For some reason when using mips COFF the value stored in the .text |
| 73 | section for a reference to a common symbol is the value itself plus |
| 74 | any desired offset. Ian Taylor, Cygnus Support. */ |
| 75 | |
| 76 | /* If we are producing relocatable output, we need to do some |
| 77 | adjustments to the object file that are not done by the |
| 78 | bfd_perform_relocation function. This function is called by every |
| 79 | reloc type to make any required adjustments. */ |
| 80 | |
| 81 | static bfd_reloc_status_type |
| 82 | coff_mips_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, |
| 83 | error_message) |
| 84 | bfd *abfd; |
| 85 | arelent *reloc_entry; |
| 86 | asymbol *symbol; |
| 87 | PTR data; |
| 88 | asection *input_section ATTRIBUTE_UNUSED; |
| 89 | bfd *output_bfd; |
| 90 | char **error_message ATTRIBUTE_UNUSED; |
| 91 | { |
| 92 | symvalue diff; |
| 93 | |
| 94 | if (output_bfd == (bfd *) NULL) |
| 95 | return bfd_reloc_continue; |
| 96 | |
| 97 | if (bfd_is_com_section (symbol->section)) |
| 98 | { |
| 99 | #ifndef COFF_WITH_PE |
| 100 | /* We are relocating a common symbol. The current value in the |
| 101 | object file is ORIG + OFFSET, where ORIG is the value of the |
| 102 | common symbol as seen by the object file when it was compiled |
| 103 | (this may be zero if the symbol was undefined) and OFFSET is |
| 104 | the offset into the common symbol (normally zero, but may be |
| 105 | non-zero when referring to a field in a common structure). |
| 106 | ORIG is the negative of reloc_entry->addend, which is set by |
| 107 | the CALC_ADDEND macro below. We want to replace the value in |
| 108 | the object file with NEW + OFFSET, where NEW is the value of |
| 109 | the common symbol which we are going to put in the final |
| 110 | object file. NEW is symbol->value. */ |
| 111 | diff = symbol->value + reloc_entry->addend; |
| 112 | #else |
| 113 | /* In PE mode, we do not offset the common symbol. */ |
| 114 | diff = reloc_entry->addend; |
| 115 | #endif |
| 116 | } |
| 117 | else |
| 118 | { |
| 119 | /* For some reason bfd_perform_relocation always effectively |
| 120 | ignores the addend for a COFF target when producing |
| 121 | relocatable output. This seems to be always wrong for 386 |
| 122 | COFF, so we handle the addend here instead. */ |
| 123 | diff = reloc_entry->addend; |
| 124 | } |
| 125 | |
| 126 | #ifdef COFF_WITH_PE |
| 127 | #if 0 |
| 128 | /* dj - handle it like any other reloc? */ |
| 129 | /* FIXME: How should this case be handled? */ |
| 130 | if (reloc_entry->howto->type == MIPS_R_RVA && diff != 0) |
| 131 | abort (); |
| 132 | #endif |
| 133 | #endif |
| 134 | |
| 135 | #define DOIT(x) \ |
| 136 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask)) |
| 137 | |
| 138 | if (diff != 0) |
| 139 | { |
| 140 | reloc_howto_type *howto = reloc_entry->howto; |
| 141 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; |
| 142 | |
| 143 | switch (howto->size) |
| 144 | { |
| 145 | case 0: |
| 146 | { |
| 147 | char x = bfd_get_8 (abfd, addr); |
| 148 | DOIT (x); |
| 149 | bfd_put_8 (abfd, x, addr); |
| 150 | } |
| 151 | break; |
| 152 | |
| 153 | case 1: |
| 154 | { |
| 155 | short x = bfd_get_16 (abfd, addr); |
| 156 | DOIT (x); |
| 157 | bfd_put_16 (abfd, (bfd_vma) x, addr); |
| 158 | } |
| 159 | break; |
| 160 | |
| 161 | case 2: |
| 162 | { |
| 163 | long x = bfd_get_32 (abfd, addr); |
| 164 | DOIT (x); |
| 165 | bfd_put_32 (abfd, (bfd_vma) x, addr); |
| 166 | } |
| 167 | break; |
| 168 | |
| 169 | default: |
| 170 | abort (); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | /* Now let bfd_perform_relocation finish everything up. */ |
| 175 | return bfd_reloc_continue; |
| 176 | } |
| 177 | |
| 178 | #ifdef COFF_WITH_PE |
| 179 | /* Return TRUE if this relocation should |
| 180 | appear in the output .reloc section. */ |
| 181 | |
| 182 | static bfd_boolean |
| 183 | in_reloc_p (abfd, howto) |
| 184 | bfd * abfd ATTRIBUTE_UNUSED; |
| 185 | reloc_howto_type *howto; |
| 186 | { |
| 187 | return ! howto->pc_relative && howto->type != MIPS_R_RVA; |
| 188 | } |
| 189 | #endif |
| 190 | |
| 191 | #ifndef PCRELOFFSET |
| 192 | #define PCRELOFFSET FALSE |
| 193 | #endif |
| 194 | |
| 195 | static reloc_howto_type howto_table[] = |
| 196 | { |
| 197 | /* Reloc type 0 is ignored. The reloc reading code ensures that |
| 198 | this is a reference to the .abs section, which will cause |
| 199 | bfd_perform_relocation to do nothing. */ |
| 200 | HOWTO (MIPS_R_ABSOLUTE, /* type */ |
| 201 | 0, /* rightshift */ |
| 202 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 203 | 8, /* bitsize */ |
| 204 | FALSE, /* pc_relative */ |
| 205 | 0, /* bitpos */ |
| 206 | complain_overflow_dont, /* complain_on_overflow */ |
| 207 | 0, /* special_function */ |
| 208 | "IGNORE", /* name */ |
| 209 | FALSE, /* partial_inplace */ |
| 210 | 0, /* src_mask */ |
| 211 | 0, /* dst_mask */ |
| 212 | FALSE), /* pcrel_offset */ |
| 213 | |
| 214 | /* A 16 bit reference to a symbol, normally from a data section. */ |
| 215 | HOWTO (MIPS_R_REFHALF, /* type */ |
| 216 | 0, /* rightshift */ |
| 217 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 218 | 16, /* bitsize */ |
| 219 | FALSE, /* pc_relative */ |
| 220 | 0, /* bitpos */ |
| 221 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 222 | coff_mips_reloc, /* special_function */ |
| 223 | "REFHALF", /* name */ |
| 224 | TRUE, /* partial_inplace */ |
| 225 | 0xffff, /* src_mask */ |
| 226 | 0xffff, /* dst_mask */ |
| 227 | FALSE), /* pcrel_offset */ |
| 228 | |
| 229 | /* A 32 bit reference to a symbol, normally from a data section. */ |
| 230 | HOWTO (MIPS_R_REFWORD, /* type */ |
| 231 | 0, /* rightshift */ |
| 232 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 233 | 32, /* bitsize */ |
| 234 | FALSE, /* pc_relative */ |
| 235 | 0, /* bitpos */ |
| 236 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 237 | coff_mips_reloc, /* special_function */ |
| 238 | "REFWORD", /* name */ |
| 239 | TRUE, /* partial_inplace */ |
| 240 | 0xffffffff, /* src_mask */ |
| 241 | 0xffffffff, /* dst_mask */ |
| 242 | FALSE), /* pcrel_offset */ |
| 243 | |
| 244 | /* A 26 bit absolute jump address. */ |
| 245 | HOWTO (MIPS_R_JMPADDR, /* type */ |
| 246 | 2, /* rightshift */ |
| 247 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 248 | 26, /* bitsize */ |
| 249 | FALSE, /* pc_relative */ |
| 250 | 0, /* bitpos */ |
| 251 | complain_overflow_dont, /* complain_on_overflow */ |
| 252 | /* This needs complex overflow |
| 253 | detection, because the upper four |
| 254 | bits must match the PC. */ |
| 255 | coff_mips_reloc, /* special_function */ |
| 256 | "JMPADDR", /* name */ |
| 257 | TRUE, /* partial_inplace */ |
| 258 | 0x3ffffff, /* src_mask */ |
| 259 | 0x3ffffff, /* dst_mask */ |
| 260 | FALSE), /* pcrel_offset */ |
| 261 | |
| 262 | /* The high 16 bits of a symbol value. Handled by the function |
| 263 | mips_refhi_reloc. */ |
| 264 | HOWTO (MIPS_R_REFHI, /* type */ |
| 265 | 16, /* rightshift */ |
| 266 | 2, /* 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 | coff_mips_reloc, /* special_function */ |
| 272 | "REFHI", /* name */ |
| 273 | TRUE, /* partial_inplace */ |
| 274 | 0xffff, /* src_mask */ |
| 275 | 0xffff, /* dst_mask */ |
| 276 | FALSE), /* pcrel_offset */ |
| 277 | |
| 278 | /* The low 16 bits of a symbol value. */ |
| 279 | HOWTO (MIPS_R_REFLO, /* type */ |
| 280 | 0, /* rightshift */ |
| 281 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 282 | 16, /* bitsize */ |
| 283 | FALSE, /* pc_relative */ |
| 284 | 0, /* bitpos */ |
| 285 | complain_overflow_dont, /* complain_on_overflow */ |
| 286 | coff_mips_reloc, /* special_function */ |
| 287 | "REFLO", /* name */ |
| 288 | TRUE, /* partial_inplace */ |
| 289 | 0xffff, /* src_mask */ |
| 290 | 0xffff, /* dst_mask */ |
| 291 | FALSE), /* pcrel_offset */ |
| 292 | |
| 293 | /* A reference to an offset from the gp register. Handled by the |
| 294 | function mips_gprel_reloc. */ |
| 295 | HOWTO (MIPS_R_GPREL, /* type */ |
| 296 | 0, /* rightshift */ |
| 297 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 298 | 16, /* bitsize */ |
| 299 | FALSE, /* pc_relative */ |
| 300 | 0, /* bitpos */ |
| 301 | complain_overflow_signed, /* complain_on_overflow */ |
| 302 | coff_mips_reloc, /* special_function */ |
| 303 | "GPREL", /* name */ |
| 304 | TRUE, /* partial_inplace */ |
| 305 | 0xffff, /* src_mask */ |
| 306 | 0xffff, /* dst_mask */ |
| 307 | FALSE), /* pcrel_offset */ |
| 308 | |
| 309 | /* A reference to a literal using an offset from the gp register. |
| 310 | Handled by the function mips_gprel_reloc. */ |
| 311 | HOWTO (MIPS_R_LITERAL, /* type */ |
| 312 | 0, /* rightshift */ |
| 313 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 314 | 16, /* bitsize */ |
| 315 | FALSE, /* pc_relative */ |
| 316 | 0, /* bitpos */ |
| 317 | complain_overflow_signed, /* complain_on_overflow */ |
| 318 | coff_mips_reloc, /* special_function */ |
| 319 | "LITERAL", /* name */ |
| 320 | TRUE, /* partial_inplace */ |
| 321 | 0xffff, /* src_mask */ |
| 322 | 0xffff, /* dst_mask */ |
| 323 | FALSE), /* pcrel_offset */ |
| 324 | |
| 325 | EMPTY_HOWTO (8), |
| 326 | EMPTY_HOWTO (9), |
| 327 | EMPTY_HOWTO (10), |
| 328 | EMPTY_HOWTO (11), |
| 329 | EMPTY_HOWTO (12), |
| 330 | EMPTY_HOWTO (13), |
| 331 | EMPTY_HOWTO (14), |
| 332 | EMPTY_HOWTO (15), |
| 333 | EMPTY_HOWTO (16), |
| 334 | EMPTY_HOWTO (17), |
| 335 | EMPTY_HOWTO (18), |
| 336 | EMPTY_HOWTO (19), |
| 337 | EMPTY_HOWTO (20), |
| 338 | EMPTY_HOWTO (21), |
| 339 | EMPTY_HOWTO (22), |
| 340 | EMPTY_HOWTO (23), |
| 341 | EMPTY_HOWTO (24), |
| 342 | EMPTY_HOWTO (25), |
| 343 | EMPTY_HOWTO (26), |
| 344 | EMPTY_HOWTO (27), |
| 345 | EMPTY_HOWTO (28), |
| 346 | EMPTY_HOWTO (29), |
| 347 | EMPTY_HOWTO (30), |
| 348 | EMPTY_HOWTO (31), |
| 349 | EMPTY_HOWTO (32), |
| 350 | EMPTY_HOWTO (33), |
| 351 | HOWTO (MIPS_R_RVA, /* type */ |
| 352 | 0, /* rightshift */ |
| 353 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 354 | 32, /* bitsize */ |
| 355 | FALSE, /* pc_relative */ |
| 356 | 0, /* bitpos */ |
| 357 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 358 | coff_mips_reloc, /* special_function */ |
| 359 | "rva32", /* name */ |
| 360 | TRUE, /* partial_inplace */ |
| 361 | 0xffffffff, /* src_mask */ |
| 362 | 0xffffffff, /* dst_mask */ |
| 363 | FALSE), /* pcrel_offset */ |
| 364 | EMPTY_HOWTO (35), |
| 365 | EMPTY_HOWTO (36), |
| 366 | HOWTO (MIPS_R_PAIR, /* type */ |
| 367 | 0, /* rightshift */ |
| 368 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 369 | 32, /* bitsize */ |
| 370 | FALSE, /* pc_relative */ |
| 371 | 0, /* bitpos */ |
| 372 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 373 | coff_mips_reloc, /* special_function */ |
| 374 | "PAIR", /* name */ |
| 375 | TRUE, /* partial_inplace */ |
| 376 | 0xffffffff, /* src_mask */ |
| 377 | 0xffffffff, /* dst_mask */ |
| 378 | FALSE), /* pcrel_offset */ |
| 379 | }; |
| 380 | |
| 381 | /* Turn a howto into a reloc nunmber */ |
| 382 | |
| 383 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } |
| 384 | #define BADMAG(x) MIPSBADMAG(x) |
| 385 | #define MIPS 1 /* Customize coffcode.h */ |
| 386 | |
| 387 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
| 388 | (cache_ptr)->howto = howto_table + (dst)->r_type; |
| 389 | |
| 390 | /* Compute the addend of a reloc. If the reloc is to a common symbol, |
| 391 | the object file contains the value of the common symbol. By the |
| 392 | time this is called, the linker may be using a different symbol |
| 393 | from a different object file with a different value. Therefore, we |
| 394 | hack wildly to locate the original symbol from this file so that we |
| 395 | can make the correct adjustment. This macro sets coffsym to the |
| 396 | symbol from the original file, and uses it to set the addend value |
| 397 | correctly. If this is not a common symbol, the usual addend |
| 398 | calculation is done, except that an additional tweak is needed for |
| 399 | PC relative relocs. |
| 400 | FIXME: This macro refers to symbols and asect; these are from the |
| 401 | calling function, not the macro arguments. */ |
| 402 | |
| 403 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ |
| 404 | { \ |
| 405 | coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ |
| 406 | if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ |
| 407 | coffsym = (obj_symbols (abfd) \ |
| 408 | + (cache_ptr->sym_ptr_ptr - symbols)); \ |
| 409 | else if (ptr) \ |
| 410 | coffsym = coff_symbol_from (abfd, ptr); \ |
| 411 | if (coffsym != (coff_symbol_type *) NULL \ |
| 412 | && coffsym->native->u.syment.n_scnum == 0) \ |
| 413 | cache_ptr->addend = - coffsym->native->u.syment.n_value; \ |
| 414 | else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ |
| 415 | && ptr->section != (asection *) NULL) \ |
| 416 | cache_ptr->addend = - (ptr->section->vma + ptr->value); \ |
| 417 | else \ |
| 418 | cache_ptr->addend = 0; \ |
| 419 | if (ptr && howto_table[reloc.r_type].pc_relative) \ |
| 420 | cache_ptr->addend += asect->vma; \ |
| 421 | } |
| 422 | |
| 423 | /* Convert an rtype to howto for the COFF backend linker. */ |
| 424 | |
| 425 | static reloc_howto_type * |
| 426 | coff_mips_rtype_to_howto (abfd, sec, rel, h, sym, addendp) |
| 427 | bfd *abfd ATTRIBUTE_UNUSED; |
| 428 | asection *sec; |
| 429 | struct internal_reloc *rel; |
| 430 | struct coff_link_hash_entry *h; |
| 431 | struct internal_syment *sym; |
| 432 | bfd_vma *addendp; |
| 433 | { |
| 434 | |
| 435 | reloc_howto_type *howto; |
| 436 | |
| 437 | howto = howto_table + rel->r_type; |
| 438 | |
| 439 | #ifdef COFF_WITH_PE |
| 440 | *addendp = 0; |
| 441 | #endif |
| 442 | |
| 443 | if (howto->pc_relative) |
| 444 | *addendp += sec->vma; |
| 445 | |
| 446 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) |
| 447 | { |
| 448 | /* This is a common symbol. The section contents include the |
| 449 | size (sym->n_value) as an addend. The relocate_section |
| 450 | function will be adding in the final value of the symbol. We |
| 451 | need to subtract out the current size in order to get the |
| 452 | correct result. */ |
| 453 | |
| 454 | BFD_ASSERT (h != NULL); |
| 455 | |
| 456 | #ifndef COFF_WITH_PE |
| 457 | /* I think we *do* want to bypass this. If we don't, I have |
| 458 | seen some data parameters get the wrong relocation address. |
| 459 | If I link two versions with and without this section bypassed |
| 460 | and then do a binary comparison, the addresses which are |
| 461 | different can be looked up in the map. The case in which |
| 462 | this section has been bypassed has addresses which correspond |
| 463 | to values I can find in the map. */ |
| 464 | *addendp -= sym->n_value; |
| 465 | #endif |
| 466 | } |
| 467 | |
| 468 | #ifndef COFF_WITH_PE |
| 469 | /* If the output symbol is common (in which case this must be a |
| 470 | relocatable link), we need to add in the final size of the |
| 471 | common symbol. */ |
| 472 | if (h != NULL && h->root.type == bfd_link_hash_common) |
| 473 | *addendp += h->root.u.c.size; |
| 474 | #endif |
| 475 | |
| 476 | #ifdef COFF_WITH_PE |
| 477 | if (howto->pc_relative) |
| 478 | { |
| 479 | *addendp -= 4; |
| 480 | |
| 481 | /* If the symbol is defined, then the generic code is going to |
| 482 | add back the symbol value in order to cancel out an |
| 483 | adjustment it made to the addend. However, we set the addend |
| 484 | to 0 at the start of this function. We need to adjust here, |
| 485 | to avoid the adjustment the generic code will make. FIXME: |
| 486 | This is getting a bit hackish. */ |
| 487 | if (sym != NULL && sym->n_scnum != 0) |
| 488 | *addendp -= sym->n_value; |
| 489 | } |
| 490 | |
| 491 | if (rel->r_type == MIPS_R_RVA) |
| 492 | { |
| 493 | *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; |
| 494 | } |
| 495 | #endif |
| 496 | |
| 497 | return howto; |
| 498 | } |
| 499 | |
| 500 | #define coff_rtype_to_howto coff_mips_rtype_to_howto |
| 501 | |
| 502 | #define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup |
| 503 | |
| 504 | /* Get the howto structure for a generic reloc type. */ |
| 505 | |
| 506 | static reloc_howto_type * |
| 507 | coff_mips_reloc_type_lookup (abfd, code) |
| 508 | bfd *abfd ATTRIBUTE_UNUSED; |
| 509 | bfd_reloc_code_real_type code; |
| 510 | { |
| 511 | int mips_type; |
| 512 | |
| 513 | switch (code) |
| 514 | { |
| 515 | case BFD_RELOC_16: |
| 516 | mips_type = MIPS_R_REFHALF; |
| 517 | break; |
| 518 | case BFD_RELOC_32: |
| 519 | case BFD_RELOC_CTOR: |
| 520 | mips_type = MIPS_R_REFWORD; |
| 521 | break; |
| 522 | case BFD_RELOC_MIPS_JMP: |
| 523 | mips_type = MIPS_R_JMPADDR; |
| 524 | break; |
| 525 | case BFD_RELOC_HI16_S: |
| 526 | mips_type = MIPS_R_REFHI; |
| 527 | break; |
| 528 | case BFD_RELOC_LO16: |
| 529 | mips_type = MIPS_R_REFLO; |
| 530 | break; |
| 531 | case BFD_RELOC_GPREL16: |
| 532 | mips_type = MIPS_R_GPREL; |
| 533 | break; |
| 534 | case BFD_RELOC_MIPS_LITERAL: |
| 535 | mips_type = MIPS_R_LITERAL; |
| 536 | break; |
| 537 | /* FIXME? |
| 538 | case BFD_RELOC_16_PCREL_S2: |
| 539 | mips_type = MIPS_R_PCREL16; |
| 540 | break; |
| 541 | case BFD_RELOC_PCREL_HI16_S: |
| 542 | mips_type = MIPS_R_RELHI; |
| 543 | break; |
| 544 | case BFD_RELOC_PCREL_LO16: |
| 545 | mips_type = MIPS_R_RELLO; |
| 546 | break; |
| 547 | case BFD_RELOC_GPREL32: |
| 548 | mips_type = MIPS_R_SWITCH; |
| 549 | break; |
| 550 | */ |
| 551 | case BFD_RELOC_RVA: |
| 552 | mips_type = MIPS_R_RVA; |
| 553 | break; |
| 554 | default: |
| 555 | return (reloc_howto_type *) NULL; |
| 556 | } |
| 557 | |
| 558 | return &howto_table[mips_type]; |
| 559 | } |
| 560 | |
| 561 | static void |
| 562 | mips_swap_reloc_in (abfd, src, dst) |
| 563 | bfd *abfd; |
| 564 | PTR src; |
| 565 | PTR dst; |
| 566 | { |
| 567 | static struct internal_reloc pair_prev; |
| 568 | RELOC *reloc_src = (RELOC *) src; |
| 569 | struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; |
| 570 | |
| 571 | reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); |
| 572 | reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); |
| 573 | reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); |
| 574 | reloc_dst->r_size = 0; |
| 575 | reloc_dst->r_extern = 0; |
| 576 | reloc_dst->r_offset = 0; |
| 577 | |
| 578 | switch (reloc_dst->r_type) |
| 579 | { |
| 580 | case MIPS_R_REFHI: |
| 581 | pair_prev = *reloc_dst; |
| 582 | break; |
| 583 | case MIPS_R_PAIR: |
| 584 | reloc_dst->r_offset = reloc_dst->r_symndx; |
| 585 | if (reloc_dst->r_offset & 0x8000) |
| 586 | reloc_dst->r_offset -= 0x10000; |
| 587 | /*printf ("dj: pair offset is %08x\n", reloc_dst->r_offset);*/ |
| 588 | reloc_dst->r_symndx = pair_prev.r_symndx; |
| 589 | break; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | static unsigned int |
| 594 | mips_swap_reloc_out (abfd, src, dst) |
| 595 | bfd *abfd; |
| 596 | PTR src; |
| 597 | PTR dst; |
| 598 | { |
| 599 | static int prev_offset = 1; |
| 600 | static bfd_vma prev_addr = 0; |
| 601 | struct internal_reloc *reloc_src = (struct internal_reloc *)src; |
| 602 | struct external_reloc *reloc_dst = (struct external_reloc *)dst; |
| 603 | |
| 604 | switch (reloc_src->r_type) |
| 605 | { |
| 606 | case MIPS_R_REFHI: |
| 607 | prev_addr = reloc_src->r_vaddr; |
| 608 | prev_offset = reloc_src->r_offset; |
| 609 | break; |
| 610 | case MIPS_R_REFLO: |
| 611 | if (reloc_src->r_vaddr == prev_addr) |
| 612 | { |
| 613 | /* FIXME: only slightly hackish. If we see a REFLO pointing to |
| 614 | the same address as a REFHI, we assume this is the matching |
| 615 | PAIR reloc and output it accordingly. The symndx is really |
| 616 | the low 16 bits of the addend */ |
| 617 | H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); |
| 618 | H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); |
| 619 | H_PUT_16 (abfd, MIPS_R_PAIR, reloc_dst->r_type); |
| 620 | return RELSZ; |
| 621 | } |
| 622 | break; |
| 623 | } |
| 624 | |
| 625 | H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); |
| 626 | H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); |
| 627 | |
| 628 | H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); |
| 629 | return RELSZ; |
| 630 | } |
| 631 | |
| 632 | #define coff_swap_reloc_in mips_swap_reloc_in |
| 633 | #define coff_swap_reloc_out mips_swap_reloc_out |
| 634 | #define NO_COFF_RELOCS |
| 635 | |
| 636 | static bfd_boolean |
| 637 | coff_pe_mips_relocate_section (output_bfd, info, input_bfd, |
| 638 | input_section, contents, relocs, syms, |
| 639 | sections) |
| 640 | bfd *output_bfd; |
| 641 | struct bfd_link_info *info; |
| 642 | bfd *input_bfd; |
| 643 | asection *input_section; |
| 644 | bfd_byte *contents; |
| 645 | struct internal_reloc *relocs; |
| 646 | struct internal_syment *syms; |
| 647 | asection **sections; |
| 648 | { |
| 649 | bfd_vma gp; |
| 650 | bfd_boolean gp_undefined; |
| 651 | size_t adjust; |
| 652 | struct internal_reloc *rel; |
| 653 | struct internal_reloc *rel_end; |
| 654 | unsigned int i; |
| 655 | bfd_boolean got_lo; |
| 656 | |
| 657 | if (info->relocatable) |
| 658 | { |
| 659 | (*_bfd_error_handler) (_("\ |
| 660 | %s: `ld -r' not supported with PE MIPS objects\n"), |
| 661 | bfd_archive_filename (input_bfd)); |
| 662 | bfd_set_error (bfd_error_bad_value); |
| 663 | return FALSE; |
| 664 | } |
| 665 | |
| 666 | BFD_ASSERT (input_bfd->xvec->byteorder |
| 667 | == output_bfd->xvec->byteorder); |
| 668 | |
| 669 | #if 0 |
| 670 | printf ("dj: relocate %s(%s) %08x\n", |
| 671 | input_bfd->filename, input_section->name, |
| 672 | input_section->output_section->vma + input_section->output_offset); |
| 673 | #endif |
| 674 | |
| 675 | gp = _bfd_get_gp_value (output_bfd); |
| 676 | if (gp == 0) |
| 677 | gp_undefined = TRUE; |
| 678 | else |
| 679 | gp_undefined = FALSE; |
| 680 | |
| 681 | got_lo = FALSE; |
| 682 | |
| 683 | adjust = 0; |
| 684 | |
| 685 | rel = relocs; |
| 686 | rel_end = rel + input_section->reloc_count; |
| 687 | for (i = 0; rel < rel_end; rel++, i++) |
| 688 | { |
| 689 | long symndx; |
| 690 | struct coff_link_hash_entry *h; |
| 691 | struct internal_syment *sym; |
| 692 | bfd_vma addend = 0; |
| 693 | bfd_vma val, tmp, targ, src, low; |
| 694 | reloc_howto_type *howto; |
| 695 | unsigned char *mem = contents + rel->r_vaddr; |
| 696 | |
| 697 | symndx = rel->r_symndx; |
| 698 | |
| 699 | if (symndx == -1) |
| 700 | { |
| 701 | h = NULL; |
| 702 | sym = NULL; |
| 703 | } |
| 704 | else |
| 705 | { |
| 706 | h = obj_coff_sym_hashes (input_bfd)[symndx]; |
| 707 | sym = syms + symndx; |
| 708 | } |
| 709 | |
| 710 | /* COFF treats common symbols in one of two ways. Either the |
| 711 | size of the symbol is included in the section contents, or it |
| 712 | is not. We assume that the size is not included, and force |
| 713 | the rtype_to_howto function to adjust the addend as needed. */ |
| 714 | |
| 715 | if (sym != NULL && sym->n_scnum != 0) |
| 716 | addend = - sym->n_value; |
| 717 | else |
| 718 | addend = 0; |
| 719 | |
| 720 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, |
| 721 | sym, &addend); |
| 722 | if (howto == NULL) |
| 723 | return FALSE; |
| 724 | |
| 725 | /* If we are doing a relocatable link, then we can just ignore |
| 726 | a PC relative reloc that is pcrel_offset. It will already |
| 727 | have the correct value. If this is not a relocatable link, |
| 728 | then we should ignore the symbol value. */ |
| 729 | if (howto->pc_relative && howto->pcrel_offset) |
| 730 | { |
| 731 | if (info->relocatable) |
| 732 | continue; |
| 733 | if (sym != NULL && sym->n_scnum != 0) |
| 734 | addend += sym->n_value; |
| 735 | } |
| 736 | |
| 737 | val = 0; |
| 738 | |
| 739 | if (h == NULL) |
| 740 | { |
| 741 | asection *sec; |
| 742 | |
| 743 | if (symndx == -1) |
| 744 | { |
| 745 | sec = bfd_abs_section_ptr; |
| 746 | val = 0; |
| 747 | } |
| 748 | else |
| 749 | { |
| 750 | sec = sections[symndx]; |
| 751 | val = (sec->output_section->vma |
| 752 | + sec->output_offset |
| 753 | + sym->n_value); |
| 754 | if (! obj_pe (input_bfd)) |
| 755 | val -= sec->vma; |
| 756 | } |
| 757 | } |
| 758 | else |
| 759 | { |
| 760 | if (h->root.type == bfd_link_hash_defined |
| 761 | || h->root.type == bfd_link_hash_defweak) |
| 762 | { |
| 763 | asection *sec; |
| 764 | |
| 765 | sec = h->root.u.def.section; |
| 766 | val = (h->root.u.def.value |
| 767 | + sec->output_section->vma |
| 768 | + sec->output_offset); |
| 769 | } |
| 770 | |
| 771 | else if (! info->relocatable) |
| 772 | { |
| 773 | if (! ((*info->callbacks->undefined_symbol) |
| 774 | (info, h->root.root.string, input_bfd, input_section, |
| 775 | rel->r_vaddr - input_section->vma, TRUE))) |
| 776 | return FALSE; |
| 777 | } |
| 778 | } |
| 779 | |
| 780 | src = rel->r_vaddr + input_section->output_section->vma |
| 781 | + input_section->output_offset; |
| 782 | #if 0 |
| 783 | printf ("dj: reloc %02x %-8s a=%08x/%08x(%08x) v=%08x+%08x %s\n", |
| 784 | rel->r_type, howto_table[rel->r_type].name, |
| 785 | src, rel->r_vaddr, *(unsigned long *)mem, val, rel->r_offset, |
| 786 | h?h->root.root.string:"(none)"); |
| 787 | #endif |
| 788 | |
| 789 | /* OK, at this point the following variables are set up: |
| 790 | src = VMA of the memory we're fixing up |
| 791 | mem = pointer to memory we're fixing up |
| 792 | val = VMA of what we need to refer to |
| 793 | */ |
| 794 | |
| 795 | #define UI(x) (*_bfd_error_handler) (_("%s: unimplemented %s\n"), \ |
| 796 | bfd_archive_filename (input_bfd), x); \ |
| 797 | bfd_set_error (bfd_error_bad_value); |
| 798 | |
| 799 | switch (rel->r_type) |
| 800 | { |
| 801 | case MIPS_R_ABSOLUTE: |
| 802 | /* ignore these */ |
| 803 | break; |
| 804 | |
| 805 | case MIPS_R_REFHALF: |
| 806 | UI("refhalf"); |
| 807 | break; |
| 808 | |
| 809 | case MIPS_R_REFWORD: |
| 810 | tmp = bfd_get_32(input_bfd, mem); |
| 811 | /* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
| 812 | tmp += val; |
| 813 | bfd_put_32(input_bfd, tmp, mem); |
| 814 | break; |
| 815 | |
| 816 | case MIPS_R_JMPADDR: |
| 817 | tmp = bfd_get_32(input_bfd, mem); |
| 818 | targ = val + (tmp&0x03ffffff)*4; |
| 819 | if ((src & 0xf0000000) != (targ & 0xf0000000)) |
| 820 | { |
| 821 | (*_bfd_error_handler) (_("%s: jump too far away\n"), |
| 822 | bfd_archive_filename (input_bfd)); |
| 823 | bfd_set_error (bfd_error_bad_value); |
| 824 | return FALSE; |
| 825 | } |
| 826 | tmp &= 0xfc000000; |
| 827 | tmp |= (targ/4) & 0x3ffffff; |
| 828 | bfd_put_32(input_bfd, tmp, mem); |
| 829 | break; |
| 830 | |
| 831 | case MIPS_R_REFHI: |
| 832 | tmp = bfd_get_32(input_bfd, mem); |
| 833 | switch (rel[1].r_type) |
| 834 | { |
| 835 | case MIPS_R_PAIR: |
| 836 | /* MS PE object */ |
| 837 | targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16); |
| 838 | break; |
| 839 | case MIPS_R_REFLO: |
| 840 | /* GNU COFF object */ |
| 841 | low = bfd_get_32(input_bfd, contents + rel[1].r_vaddr); |
| 842 | low &= 0xffff; |
| 843 | if (low & 0x8000) |
| 844 | low -= 0x10000; |
| 845 | targ = val + low + ((tmp & 0xffff) << 16); |
| 846 | break; |
| 847 | default: |
| 848 | (*_bfd_error_handler) (_("%s: bad pair/reflo after refhi\n"), |
| 849 | bfd_archive_filename (input_bfd)); |
| 850 | bfd_set_error (bfd_error_bad_value); |
| 851 | return FALSE; |
| 852 | } |
| 853 | tmp &= 0xffff0000; |
| 854 | tmp |= (targ >> 16) & 0xffff; |
| 855 | bfd_put_32(input_bfd, tmp, mem); |
| 856 | break; |
| 857 | |
| 858 | case MIPS_R_REFLO: |
| 859 | tmp = bfd_get_32(input_bfd, mem); |
| 860 | targ = val + (tmp & 0xffff); |
| 861 | /* printf ("refword: src=%08x targ=%08x\n", src, targ); */ |
| 862 | tmp &= 0xffff0000; |
| 863 | tmp |= targ & 0xffff; |
| 864 | bfd_put_32(input_bfd, tmp, mem); |
| 865 | break; |
| 866 | |
| 867 | case MIPS_R_GPREL: |
| 868 | case MIPS_R_LITERAL: |
| 869 | UI("gprel"); |
| 870 | break; |
| 871 | |
| 872 | case MIPS_R_SECTION: |
| 873 | UI("section"); |
| 874 | break; |
| 875 | |
| 876 | case MIPS_R_SECREL: |
| 877 | UI("secrel"); |
| 878 | break; |
| 879 | |
| 880 | case MIPS_R_SECRELLO: |
| 881 | UI("secrello"); |
| 882 | break; |
| 883 | |
| 884 | case MIPS_R_SECRELHI: |
| 885 | UI("secrelhi"); |
| 886 | break; |
| 887 | |
| 888 | case MIPS_R_RVA: |
| 889 | tmp = bfd_get_32 (input_bfd, mem); |
| 890 | /* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */ |
| 891 | tmp += val |
| 892 | - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; |
| 893 | bfd_put_32 (input_bfd, tmp, mem); |
| 894 | break; |
| 895 | |
| 896 | case MIPS_R_PAIR: |
| 897 | /* ignore these */ |
| 898 | break; |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | return TRUE; |
| 903 | } |
| 904 | |
| 905 | #define coff_relocate_section coff_pe_mips_relocate_section |
| 906 | |
| 907 | #ifdef TARGET_UNDERSCORE |
| 908 | |
| 909 | /* If mips gcc uses underscores for symbol names, then it does not use |
| 910 | a leading dot for local labels, so if TARGET_UNDERSCORE is defined |
| 911 | we treat all symbols starting with L as local. */ |
| 912 | |
| 913 | static bfd_boolean coff_mips_is_local_label_name |
| 914 | PARAMS ((bfd *, const char *)); |
| 915 | |
| 916 | static bfd_boolean |
| 917 | coff_mips_is_local_label_name (abfd, name) |
| 918 | bfd *abfd; |
| 919 | const char *name; |
| 920 | { |
| 921 | if (name[0] == 'L') |
| 922 | return TRUE; |
| 923 | |
| 924 | return _bfd_coff_is_local_label_name (abfd, name); |
| 925 | } |
| 926 | |
| 927 | #define coff_bfd_is_local_label_name coff_mips_is_local_label_name |
| 928 | |
| 929 | #endif /* TARGET_UNDERSCORE */ |
| 930 | |
| 931 | #define COFF_NO_HACK_SCNHDR_SIZE |
| 932 | |
| 933 | #include "coffcode.h" |
| 934 | |
| 935 | const bfd_target |
| 936 | #ifdef TARGET_SYM |
| 937 | TARGET_SYM = |
| 938 | #else |
| 939 | mipslpe_vec = |
| 940 | #endif |
| 941 | { |
| 942 | #ifdef TARGET_NAME |
| 943 | TARGET_NAME, |
| 944 | #else |
| 945 | "pe-mips", /* name */ |
| 946 | #endif |
| 947 | bfd_target_coff_flavour, |
| 948 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
| 949 | BFD_ENDIAN_LITTLE, /* header byte order is little */ |
| 950 | |
| 951 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 952 | HAS_LINENO | HAS_DEBUG | |
| 953 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 954 | |
| 955 | #ifndef COFF_WITH_PE |
| 956 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ |
| 957 | | SEC_CODE | SEC_DATA), |
| 958 | #else |
| 959 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */ |
| 960 | | SEC_CODE | SEC_DATA |
| 961 | | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), |
| 962 | #endif |
| 963 | |
| 964 | #ifdef TARGET_UNDERSCORE |
| 965 | TARGET_UNDERSCORE, /* leading underscore */ |
| 966 | #else |
| 967 | 0, /* leading underscore */ |
| 968 | #endif |
| 969 | '/', /* ar_pad_char */ |
| 970 | 15, /* ar_max_namelen */ |
| 971 | |
| 972 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 973 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 974 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 975 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 976 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 977 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| 978 | |
| 979 | /* Note that we allow an object file to be treated as a core file as well. */ |
| 980 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 981 | bfd_generic_archive_p, coff_object_p}, |
| 982 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
| 983 | bfd_false}, |
| 984 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
| 985 | _bfd_write_archive_contents, bfd_false}, |
| 986 | |
| 987 | BFD_JUMP_TABLE_GENERIC (coff), |
| 988 | BFD_JUMP_TABLE_COPY (coff), |
| 989 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 990 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| 991 | BFD_JUMP_TABLE_SYMBOLS (coff), |
| 992 | BFD_JUMP_TABLE_RELOCS (coff), |
| 993 | BFD_JUMP_TABLE_WRITE (coff), |
| 994 | BFD_JUMP_TABLE_LINK (coff), |
| 995 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 996 | |
| 997 | NULL, |
| 998 | |
| 999 | COFF_SWAP_TABLE |
| 1000 | }; |