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, 2004, 2005, 2007 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 21 22#define COFF_WITH_PE 23#define COFF_LONG_SECTION_NAMES 24#define PCRELOFFSET TRUE 25 26#include "sysdep.h" 27#include "bfd.h" 28#include "libbfd.h" 29#include "coff/mipspe.h" 30#include "coff/internal.h" 31#include "coff/pe.h" 32#include "libcoff.h" 33 34#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 2 35/* The page size is a guess based on ELF. */ 36 37#define COFF_PAGE_SIZE 0x1000 38 39/* For some reason when using mips COFF the value stored in the .text 40 section for a reference to a common symbol is the value itself plus 41 any desired offset. Ian Taylor, Cygnus Support. */ 42 43/* If we are producing relocatable output, we need to do some 44 adjustments to the object file that are not done by the 45 bfd_perform_relocation function. This function is called by every 46 reloc type to make any required adjustments. */ 47 48static bfd_reloc_status_type 49coff_mips_reloc (bfd *abfd, 50 arelent *reloc_entry, 51 asymbol *symbol, 52 void * data, 53 asection *input_section ATTRIBUTE_UNUSED, 54 bfd *output_bfd, 55 char **error_message ATTRIBUTE_UNUSED) 56{ 57 symvalue diff; 58 59 if (output_bfd == NULL) 60 return bfd_reloc_continue; 61 62 if (bfd_is_com_section (symbol->section)) 63 { 64#ifndef COFF_WITH_PE 65 /* We are relocating a common symbol. The current value in the 66 object file is ORIG + OFFSET, where ORIG is the value of the 67 common symbol as seen by the object file when it was compiled 68 (this may be zero if the symbol was undefined) and OFFSET is 69 the offset into the common symbol (normally zero, but may be 70 non-zero when referring to a field in a common structure). 71 ORIG is the negative of reloc_entry->addend, which is set by 72 the CALC_ADDEND macro below. We want to replace the value in 73 the object file with NEW + OFFSET, where NEW is the value of 74 the common symbol which we are going to put in the final 75 object file. NEW is symbol->value. */ 76 diff = symbol->value + reloc_entry->addend; 77#else 78 /* In PE mode, we do not offset the common symbol. */ 79 diff = reloc_entry->addend; 80#endif 81 } 82 else 83 /* For some reason bfd_perform_relocation always effectively 84 ignores the addend for a COFF target when producing 85 relocatable output. This seems to be always wrong for 386 86 COFF, so we handle the addend here instead. */ 87 diff = reloc_entry->addend; 88 89#define DOIT(x) \ 90 x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask)) 91 92 if (diff != 0) 93 { 94 reloc_howto_type *howto = reloc_entry->howto; 95 unsigned char *addr = (unsigned char *) data + reloc_entry->address; 96 97 switch (howto->size) 98 { 99 case 0: 100 { 101 char x = bfd_get_8 (abfd, addr); 102 103 DOIT (x); 104 bfd_put_8 (abfd, x, addr); 105 } 106 break; 107 108 case 1: 109 { 110 short x = bfd_get_16 (abfd, addr); 111 112 DOIT (x); 113 bfd_put_16 (abfd, (bfd_vma) x, addr); 114 } 115 break; 116 117 case 2: 118 { 119 long x = bfd_get_32 (abfd, addr); 120 121 DOIT (x); 122 bfd_put_32 (abfd, (bfd_vma) x, addr); 123 } 124 break; 125 126 default: 127 abort (); 128 } 129 } 130 131 /* Now let bfd_perform_relocation finish everything up. */ 132 return bfd_reloc_continue; 133} 134 135#ifdef COFF_WITH_PE 136/* Return TRUE if this relocation should 137 appear in the output .reloc section. */ 138 139static bfd_boolean 140in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto) 141{ 142 return ! howto->pc_relative && howto->type != MIPS_R_RVA; 143} 144#endif 145 146#ifndef PCRELOFFSET 147#define PCRELOFFSET FALSE 148#endif 149 150static reloc_howto_type howto_table[] = 151{ 152 /* Reloc type 0 is ignored. The reloc reading code ensures that 153 this is a reference to the .abs section, which will cause 154 bfd_perform_relocation to do nothing. */ 155 HOWTO (MIPS_R_ABSOLUTE, /* Type. */ 156 0, /* Rightshift. */ 157 0, /* Size (0 = byte, 1 = short, 2 = long). */ 158 8, /* Bitsize. */ 159 FALSE, /* PC_relative. */ 160 0, /* Bitpos. */ 161 complain_overflow_dont, /* Complain_on_overflow. */ 162 0, /* Special_function. */ 163 "IGNORE", /* Name. */ 164 FALSE, /* Partial_inplace. */ 165 0, /* Src_mask. */ 166 0, /* Dst_mask. */ 167 FALSE), /* Pcrel_offset. */ 168 169 /* A 16 bit reference to a symbol, normally from a data section. */ 170 HOWTO (MIPS_R_REFHALF, /* Type. */ 171 0, /* Rightshift. */ 172 1, /* Size (0 = byte, 1 = short, 2 = long). */ 173 16, /* Bitsize. */ 174 FALSE, /* PC_relative. */ 175 0, /* Bitpos. */ 176 complain_overflow_bitfield, /* Complain_on_overflow. */ 177 coff_mips_reloc, /* Special_function. */ 178 "REFHALF", /* Name. */ 179 TRUE, /* Partial_inplace. */ 180 0xffff, /* Src_mask. */ 181 0xffff, /* Dst_mask. */ 182 FALSE), /* Pcrel_offset. */ 183 184 /* A 32 bit reference to a symbol, normally from a data section. */ 185 HOWTO (MIPS_R_REFWORD, /* Type. */ 186 0, /* Rightshift. */ 187 2, /* Size (0 = byte, 1 = short, 2 = long). */ 188 32, /* Bitsize. */ 189 FALSE, /* PC_relative. */ 190 0, /* Bitpos. */ 191 complain_overflow_bitfield, /* Complain_on_overflow. */ 192 coff_mips_reloc, /* Special_function. */ 193 "REFWORD", /* Name. */ 194 TRUE, /* Partial_inplace. */ 195 0xffffffff, /* Src_mask. */ 196 0xffffffff, /* Dst_mask. */ 197 FALSE), /* Pcrel_offset. */ 198 199 /* A 26 bit absolute jump address. */ 200 HOWTO (MIPS_R_JMPADDR, /* Type. */ 201 2, /* Rightshift. */ 202 2, /* Size (0 = byte, 1 = short, 2 = long). */ 203 26, /* Bitsize. */ 204 FALSE, /* PC_relative. */ 205 0, /* Bitpos. */ 206 complain_overflow_dont, /* Complain_on_overflow. */ 207 /* This needs complex overflow 208 detection, because the upper four 209 bits must match the PC. */ 210 coff_mips_reloc, /* Special_function. */ 211 "JMPADDR", /* Name. */ 212 TRUE, /* Partial_inplace. */ 213 0x3ffffff, /* Src_mask. */ 214 0x3ffffff, /* Dst_mask. */ 215 FALSE), /* Pcrel_offset. */ 216 217 /* The high 16 bits of a symbol value. Handled by the function 218 mips_refhi_reloc. */ 219 HOWTO (MIPS_R_REFHI, /* Type. */ 220 16, /* Rightshift. */ 221 2, /* Size (0 = byte, 1 = short, 2 = long). */ 222 16, /* Bitsize. */ 223 FALSE, /* PC_relative. */ 224 0, /* Bitpos. */ 225 complain_overflow_bitfield, /* Complain_on_overflow. */ 226 coff_mips_reloc, /* Special_function. */ 227 "REFHI", /* Name. */ 228 TRUE, /* Partial_inplace. */ 229 0xffff, /* Src_mask. */ 230 0xffff, /* Dst_mask. */ 231 FALSE), /* Pcrel_offset. */ 232 233 /* The low 16 bits of a symbol value. */ 234 HOWTO (MIPS_R_REFLO, /* Type. */ 235 0, /* Rightshift. */ 236 2, /* Size (0 = byte, 1 = short, 2 = long). */ 237 16, /* Bitsize. */ 238 FALSE, /* PC_relative. */ 239 0, /* Bitpos. */ 240 complain_overflow_dont, /* Complain_on_overflow. */ 241 coff_mips_reloc, /* Special_function. */ 242 "REFLO", /* Name. */ 243 TRUE, /* Partial_inplace. */ 244 0xffff, /* Src_mask. */ 245 0xffff, /* Dst_mask. */ 246 FALSE), /* Pcrel_offset. */ 247 248 /* A reference to an offset from the gp register. Handled by the 249 function mips_gprel_reloc. */ 250 HOWTO (MIPS_R_GPREL, /* Type. */ 251 0, /* Rightshift. */ 252 2, /* Size (0 = byte, 1 = short, 2 = long). */ 253 16, /* Bitsize. */ 254 FALSE, /* PC_relative. */ 255 0, /* Bitpos. */ 256 complain_overflow_signed, /* Complain_on_overflow. */ 257 coff_mips_reloc, /* Special_function. */ 258 "GPREL", /* Name. */ 259 TRUE, /* Partial_inplace. */ 260 0xffff, /* Src_mask. */ 261 0xffff, /* Dst_mask. */ 262 FALSE), /* Pcrel_offset. */ 263 264 /* A reference to a literal using an offset from the gp register. 265 Handled by the function mips_gprel_reloc. */ 266 HOWTO (MIPS_R_LITERAL, /* Type. */ 267 0, /* Rightshift. */ 268 2, /* Size (0 = byte, 1 = short, 2 = long). */ 269 16, /* Bitsize. */ 270 FALSE, /* PC_relative. */ 271 0, /* Bitpos. */ 272 complain_overflow_signed, /* Complain_on_overflow. */ 273 coff_mips_reloc, /* Special_function. */ 274 "LITERAL", /* Name. */ 275 TRUE, /* Partial_inplace. */ 276 0xffff, /* Src_mask. */ 277 0xffff, /* Dst_mask. */ 278 FALSE), /* Pcrel_offset. */ 279 280 EMPTY_HOWTO (8), 281 EMPTY_HOWTO (9), 282 EMPTY_HOWTO (10), 283 EMPTY_HOWTO (11), 284 EMPTY_HOWTO (12), 285 EMPTY_HOWTO (13), 286 EMPTY_HOWTO (14), 287 EMPTY_HOWTO (15), 288 EMPTY_HOWTO (16), 289 EMPTY_HOWTO (17), 290 EMPTY_HOWTO (18), 291 EMPTY_HOWTO (19), 292 EMPTY_HOWTO (20), 293 EMPTY_HOWTO (21), 294 EMPTY_HOWTO (22), 295 EMPTY_HOWTO (23), 296 EMPTY_HOWTO (24), 297 EMPTY_HOWTO (25), 298 EMPTY_HOWTO (26), 299 EMPTY_HOWTO (27), 300 EMPTY_HOWTO (28), 301 EMPTY_HOWTO (29), 302 EMPTY_HOWTO (30), 303 EMPTY_HOWTO (31), 304 EMPTY_HOWTO (32), 305 EMPTY_HOWTO (33), 306 HOWTO (MIPS_R_RVA, /* Type. */ 307 0, /* Rightshift. */ 308 2, /* Size (0 = byte, 1 = short, 2 = long). */ 309 32, /* Bitsize. */ 310 FALSE, /* PC_relative. */ 311 0, /* Bitpos. */ 312 complain_overflow_bitfield, /* Complain_on_overflow. */ 313 coff_mips_reloc, /* Special_function. */ 314 "rva32", /* Name. */ 315 TRUE, /* Partial_inplace. */ 316 0xffffffff, /* Src_mask. */ 317 0xffffffff, /* Dst_mask. */ 318 FALSE), /* Pcrel_offset. */ 319 EMPTY_HOWTO (35), 320 EMPTY_HOWTO (36), 321 HOWTO (MIPS_R_PAIR, /* Type. */ 322 0, /* Rightshift. */ 323 2, /* Size (0 = byte, 1 = short, 2 = long). */ 324 32, /* Bitsize. */ 325 FALSE, /* PC_relative. */ 326 0, /* Bitpos. */ 327 complain_overflow_bitfield, /* Complain_on_overflow. */ 328 coff_mips_reloc, /* Special_function. */ 329 "PAIR", /* Name. */ 330 TRUE, /* Partial_inplace. */ 331 0xffffffff, /* Src_mask. */ 332 0xffffffff, /* Dst_mask. */ 333 FALSE), /* Pcrel_offset. */ 334}; 335 336/* Turn a howto into a reloc nunmber. */ 337 338#define SELECT_RELOC(x, howto) { x.r_type = howto->type; } 339#define BADMAG(x) MIPSBADMAG (x) 340 341/* Customize coffcode.h. */ 342#define MIPS 1 343 344#define RTYPE2HOWTO(cache_ptr, dst) \ 345 (cache_ptr)->howto = howto_table + (dst)->r_type; 346 347/* Compute the addend of a reloc. If the reloc is to a common symbol, 348 the object file contains the value of the common symbol. By the 349 time this is called, the linker may be using a different symbol 350 from a different object file with a different value. Therefore, we 351 hack wildly to locate the original symbol from this file so that we 352 can make the correct adjustment. This macro sets coffsym to the 353 symbol from the original file, and uses it to set the addend value 354 correctly. If this is not a common symbol, the usual addend 355 calculation is done, except that an additional tweak is needed for 356 PC relative relocs. 357 FIXME: This macro refers to symbols and asect; these are from the 358 calling function, not the macro arguments. */ 359 360#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ 361 { \ 362 coff_symbol_type *coffsym = NULL; \ 363 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ 364 coffsym = (obj_symbols (abfd) \ 365 + (cache_ptr->sym_ptr_ptr - symbols)); \ 366 else if (ptr) \ 367 coffsym = coff_symbol_from (abfd, ptr); \ 368 if (coffsym != NULL \ 369 && coffsym->native->u.syment.n_scnum == 0) \ 370 cache_ptr->addend = - coffsym->native->u.syment.n_value; \ 371 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ 372 && ptr->section != NULL) \ 373 cache_ptr->addend = - (ptr->section->vma + ptr->value); \ 374 else \ 375 cache_ptr->addend = 0; \ 376 if (ptr && howto_table[reloc.r_type].pc_relative) \ 377 cache_ptr->addend += asect->vma; \ 378 } 379 380/* Convert an rtype to howto for the COFF backend linker. */ 381 382static reloc_howto_type * 383coff_mips_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 384 asection *sec, 385 struct internal_reloc *rel, 386 struct coff_link_hash_entry *h, 387 struct internal_syment *sym, 388 bfd_vma *addendp) 389{ 390 391 reloc_howto_type *howto; 392 393 howto = howto_table + rel->r_type; 394 395#ifdef COFF_WITH_PE 396 *addendp = 0; 397#endif 398 399 if (howto->pc_relative) 400 *addendp += sec->vma; 401 402 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) 403 { 404 /* This is a common symbol. The section contents include the 405 size (sym->n_value) as an addend. The relocate_section 406 function will be adding in the final value of the symbol. We 407 need to subtract out the current size in order to get the 408 correct result. */ 409 410 BFD_ASSERT (h != NULL); 411 412#ifndef COFF_WITH_PE 413 /* I think we *do* want to bypass this. If we don't, I have 414 seen some data parameters get the wrong relocation address. 415 If I link two versions with and without this section bypassed 416 and then do a binary comparison, the addresses which are 417 different can be looked up in the map. The case in which 418 this section has been bypassed has addresses which correspond 419 to values I can find in the map. */ 420 *addendp -= sym->n_value; 421#endif 422 } 423 424#ifndef COFF_WITH_PE 425 /* If the output symbol is common (in which case this must be a 426 relocatable link), we need to add in the final size of the 427 common symbol. */ 428 if (h != NULL && h->root.type == bfd_link_hash_common) 429 *addendp += h->root.u.c.size; 430#endif 431 432#ifdef COFF_WITH_PE 433 if (howto->pc_relative) 434 { 435 *addendp -= 4; 436 437 /* If the symbol is defined, then the generic code is going to 438 add back the symbol value in order to cancel out an 439 adjustment it made to the addend. However, we set the addend 440 to 0 at the start of this function. We need to adjust here, 441 to avoid the adjustment the generic code will make. FIXME: 442 This is getting a bit hackish. */ 443 if (sym != NULL && sym->n_scnum != 0) 444 *addendp -= sym->n_value; 445 } 446 447 if (rel->r_type == MIPS_R_RVA) 448 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase; 449#endif 450 451 return howto; 452} 453 454#define coff_rtype_to_howto coff_mips_rtype_to_howto 455#define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup 456#define coff_bfd_reloc_name_lookup coff_mips_reloc_name_lookup 457 458/* Get the howto structure for a generic reloc type. */ 459 460static reloc_howto_type * 461coff_mips_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 462 bfd_reloc_code_real_type code) 463{ 464 int mips_type; 465 466 switch (code) 467 { 468 case BFD_RELOC_16: 469 mips_type = MIPS_R_REFHALF; 470 break; 471 case BFD_RELOC_32: 472 case BFD_RELOC_CTOR: 473 mips_type = MIPS_R_REFWORD; 474 break; 475 case BFD_RELOC_MIPS_JMP: 476 mips_type = MIPS_R_JMPADDR; 477 break; 478 case BFD_RELOC_HI16_S: 479 mips_type = MIPS_R_REFHI; 480 break; 481 case BFD_RELOC_LO16: 482 mips_type = MIPS_R_REFLO; 483 break; 484 case BFD_RELOC_GPREL16: 485 mips_type = MIPS_R_GPREL; 486 break; 487 case BFD_RELOC_MIPS_LITERAL: 488 mips_type = MIPS_R_LITERAL; 489 break; 490 case BFD_RELOC_RVA: 491 mips_type = MIPS_R_RVA; 492 break; 493 default: 494 return NULL; 495 } 496 497 return & howto_table [mips_type]; 498} 499 500static reloc_howto_type * 501coff_mips_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 502 const char *r_name) 503{ 504 unsigned int i; 505 506 for (i = 0; 507 i < sizeof (howto_table) / sizeof (howto_table[0]); 508 i++) 509 if (howto_table[i].name != NULL 510 && strcasecmp (howto_table[i].name, r_name) == 0) 511 return &howto_table[i]; 512 513 return NULL; 514} 515 516static void 517mips_swap_reloc_in (bfd * abfd, void * src, void * dst) 518{ 519 static struct internal_reloc pair_prev; 520 RELOC *reloc_src = (RELOC *) src; 521 struct internal_reloc *reloc_dst = (struct internal_reloc *) dst; 522 523 reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr); 524 reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx); 525 reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type); 526 reloc_dst->r_size = 0; 527 reloc_dst->r_extern = 0; 528 reloc_dst->r_offset = 0; 529 530 switch (reloc_dst->r_type) 531 { 532 case MIPS_R_REFHI: 533 pair_prev = *reloc_dst; 534 break; 535 case MIPS_R_PAIR: 536 reloc_dst->r_offset = reloc_dst->r_symndx; 537 if (reloc_dst->r_offset & 0x8000) 538 reloc_dst->r_offset -= 0x10000; 539 reloc_dst->r_symndx = pair_prev.r_symndx; 540 break; 541 } 542} 543 544static unsigned int 545mips_swap_reloc_out (bfd * abfd, void * src, void * dst) 546{ 547 static int prev_offset = 1; 548 static bfd_vma prev_addr = 0; 549 struct internal_reloc *reloc_src = (struct internal_reloc *)src; 550 struct external_reloc *reloc_dst = (struct external_reloc *)dst; 551 552 switch (reloc_src->r_type) 553 { 554 case MIPS_R_REFHI: 555 prev_addr = reloc_src->r_vaddr; 556 prev_offset = reloc_src->r_offset; 557 break; 558 case MIPS_R_REFLO: 559 if (reloc_src->r_vaddr == prev_addr) 560 { 561 /* FIXME: only slightly hackish. If we see a REFLO pointing to 562 the same address as a REFHI, we assume this is the matching 563 PAIR reloc and output it accordingly. The symndx is really 564 the low 16 bits of the addend */ 565 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); 566 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); 567 H_PUT_16 (abfd, MIPS_R_PAIR, reloc_dst->r_type); 568 return RELSZ; 569 } 570 break; 571 } 572 573 H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr); 574 H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx); 575 576 H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type); 577 return RELSZ; 578} 579 580#define coff_swap_reloc_in mips_swap_reloc_in 581#define coff_swap_reloc_out mips_swap_reloc_out 582#define NO_COFF_RELOCS 583 584static bfd_boolean 585coff_pe_mips_relocate_section (bfd *output_bfd, 586 struct bfd_link_info *info, 587 bfd *input_bfd, 588 asection *input_section, 589 bfd_byte *contents, 590 struct internal_reloc *relocs, 591 struct internal_syment *syms, 592 asection **sections) 593{ 594 bfd_vma gp; 595 bfd_boolean gp_undefined; 596 size_t adjust; 597 struct internal_reloc *rel; 598 struct internal_reloc *rel_end; 599 unsigned int i; 600 bfd_boolean got_lo; 601 602 if (info->relocatable) 603 { 604 (*_bfd_error_handler) 605 (_("%B: `ld -r' not supported with PE MIPS objects\n"), input_bfd); 606 bfd_set_error (bfd_error_bad_value); 607 return FALSE; 608 } 609 610 BFD_ASSERT (input_bfd->xvec->byteorder 611 == output_bfd->xvec->byteorder); 612 613 gp = _bfd_get_gp_value (output_bfd); 614 gp_undefined = (gp == 0) ? TRUE : FALSE; 615 got_lo = FALSE; 616 adjust = 0; 617 rel = relocs; 618 rel_end = rel + input_section->reloc_count; 619 620 for (i = 0; rel < rel_end; rel++, i++) 621 { 622 long symndx; 623 struct coff_link_hash_entry *h; 624 struct internal_syment *sym; 625 bfd_vma addend = 0; 626 bfd_vma val, tmp, targ, src, low; 627 reloc_howto_type *howto; 628 unsigned char *mem = contents + rel->r_vaddr; 629 630 symndx = rel->r_symndx; 631 632 if (symndx == -1) 633 { 634 h = NULL; 635 sym = NULL; 636 } 637 else 638 { 639 h = obj_coff_sym_hashes (input_bfd)[symndx]; 640 sym = syms + symndx; 641 } 642 643 /* COFF treats common symbols in one of two ways. Either the 644 size of the symbol is included in the section contents, or it 645 is not. We assume that the size is not included, and force 646 the rtype_to_howto function to adjust the addend as needed. */ 647 648 if (sym != NULL && sym->n_scnum != 0) 649 addend = - sym->n_value; 650 else 651 addend = 0; 652 653 howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, 654 sym, &addend); 655 if (howto == NULL) 656 return FALSE; 657 658 /* If we are doing a relocatable link, then we can just ignore 659 a PC relative reloc that is pcrel_offset. It will already 660 have the correct value. If this is not a relocatable link, 661 then we should ignore the symbol value. */ 662 if (howto->pc_relative && howto->pcrel_offset) 663 { 664 if (info->relocatable) 665 continue; 666 if (sym != NULL && sym->n_scnum != 0) 667 addend += sym->n_value; 668 } 669 670 val = 0; 671 672 if (h == NULL) 673 { 674 asection *sec; 675 676 if (symndx == -1) 677 { 678 sec = bfd_abs_section_ptr; 679 val = 0; 680 } 681 else 682 { 683 sec = sections[symndx]; 684 val = (sec->output_section->vma 685 + sec->output_offset 686 + sym->n_value); 687 if (! obj_pe (input_bfd)) 688 val -= sec->vma; 689 } 690 } 691 else 692 { 693 if (h->root.type == bfd_link_hash_defined 694 || h->root.type == bfd_link_hash_defweak) 695 { 696 asection *sec; 697 698 sec = h->root.u.def.section; 699 val = (h->root.u.def.value 700 + sec->output_section->vma 701 + sec->output_offset); 702 } 703 704 else if (! info->relocatable) 705 { 706 if (! ((*info->callbacks->undefined_symbol) 707 (info, h->root.root.string, input_bfd, input_section, 708 rel->r_vaddr - input_section->vma, TRUE))) 709 return FALSE; 710 } 711 } 712 713 src = rel->r_vaddr + input_section->output_section->vma 714 + input_section->output_offset; 715 716 /* OK, at this point the following variables are set up: 717 src = VMA of the memory we're fixing up 718 mem = pointer to memory we're fixing up 719 val = VMA of what we need to refer to. */ 720 721#define UI(x) (*_bfd_error_handler) (_("%B: unimplemented %s\n"), \ 722 input_bfd, x); \ 723 bfd_set_error (bfd_error_bad_value); 724 725 switch (rel->r_type) 726 { 727 case MIPS_R_ABSOLUTE: 728 /* Ignore these. */ 729 break; 730 731 case MIPS_R_REFHALF: 732 UI ("refhalf"); 733 break; 734 735 case MIPS_R_REFWORD: 736 tmp = bfd_get_32 (input_bfd, mem); 737 /* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */ 738 tmp += val; 739 bfd_put_32 (input_bfd, tmp, mem); 740 break; 741 742 case MIPS_R_JMPADDR: 743 tmp = bfd_get_32 (input_bfd, mem); 744 targ = val + (tmp & 0x03ffffff) * 4; 745 if ((src & 0xf0000000) != (targ & 0xf0000000)) 746 { 747 (*_bfd_error_handler) (_("%B: jump too far away\n"), input_bfd); 748 bfd_set_error (bfd_error_bad_value); 749 return FALSE; 750 } 751 tmp &= 0xfc000000; 752 tmp |= (targ / 4) & 0x3ffffff; 753 bfd_put_32 (input_bfd, tmp, mem); 754 break; 755 756 case MIPS_R_REFHI: 757 tmp = bfd_get_32 (input_bfd, mem); 758 switch (rel[1].r_type) 759 { 760 case MIPS_R_PAIR: 761 /* MS PE object */ 762 targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16); 763 break; 764 case MIPS_R_REFLO: 765 /* GNU COFF object */ 766 low = bfd_get_32 (input_bfd, contents + rel[1].r_vaddr); 767 low &= 0xffff; 768 if (low & 0x8000) 769 low -= 0x10000; 770 targ = val + low + ((tmp & 0xffff) << 16); 771 break; 772 default: 773 (*_bfd_error_handler) (_("%B: bad pair/reflo after refhi\n"), 774 input_bfd); 775 bfd_set_error (bfd_error_bad_value); 776 return FALSE; 777 } 778 tmp &= 0xffff0000; 779 tmp |= (targ >> 16) & 0xffff; 780 bfd_put_32 (input_bfd, tmp, mem); 781 break; 782 783 case MIPS_R_REFLO: 784 tmp = bfd_get_32 (input_bfd, mem); 785 targ = val + (tmp & 0xffff); 786 /* printf ("refword: src=%08x targ=%08x\n", src, targ); */ 787 tmp &= 0xffff0000; 788 tmp |= targ & 0xffff; 789 bfd_put_32 (input_bfd, tmp, mem); 790 break; 791 792 case MIPS_R_GPREL: 793 case MIPS_R_LITERAL: 794 UI ("gprel"); 795 break; 796 797 case MIPS_R_SECTION: 798 UI ("section"); 799 break; 800 801 case MIPS_R_SECREL: 802 UI ("secrel"); 803 break; 804 805 case MIPS_R_SECRELLO: 806 UI ("secrello"); 807 break; 808 809 case MIPS_R_SECRELHI: 810 UI ("secrelhi"); 811 break; 812 813 case MIPS_R_RVA: 814 tmp = bfd_get_32 (input_bfd, mem); 815 /* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */ 816 tmp += val 817 - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; 818 bfd_put_32 (input_bfd, tmp, mem); 819 break; 820 821 case MIPS_R_PAIR: 822 /* ignore these */ 823 break; 824 } 825 } 826 827 return TRUE; 828} 829 830#define coff_relocate_section coff_pe_mips_relocate_section 831 832#ifdef TARGET_UNDERSCORE 833 834/* If mips gcc uses underscores for symbol names, then it does not use 835 a leading dot for local labels, so if TARGET_UNDERSCORE is defined 836 we treat all symbols starting with L as local. */ 837 838static bfd_boolean 839coff_mips_is_local_label_name (bfd *abfd, const char *name) 840{ 841 if (name[0] == 'L') 842 return TRUE; 843 844 return _bfd_coff_is_local_label_name (abfd, name); 845} 846 847#define coff_bfd_is_local_label_name coff_mips_is_local_label_name 848 849#endif /* TARGET_UNDERSCORE */ 850 851#define COFF_NO_HACK_SCNHDR_SIZE 852 853#include "coffcode.h" 854 855const bfd_target 856#ifdef TARGET_SYM 857 TARGET_SYM = 858#else 859 mipslpe_vec = 860#endif 861{ 862#ifdef TARGET_NAME 863 TARGET_NAME, 864#else 865 "pe-mips", /* Name. */ 866#endif 867 bfd_target_coff_flavour, 868 BFD_ENDIAN_LITTLE, /* Data byte order is little. */ 869 BFD_ENDIAN_LITTLE, /* Header byte order is little. */ 870 871 (HAS_RELOC | EXEC_P | /* Object flags. */ 872 HAS_LINENO | HAS_DEBUG | 873 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 874 875#ifndef COFF_WITH_PE 876 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */ 877 | SEC_CODE | SEC_DATA), 878#else 879 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */ 880 | SEC_CODE | SEC_DATA 881 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES), 882#endif 883 884#ifdef TARGET_UNDERSCORE 885 TARGET_UNDERSCORE, /* Leading underscore. */ 886#else 887 0, /* leading underscore */ 888#endif 889 '/', /* AR_pad_char. */ 890 15, /* AR_max_namelen. */ 891 892 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 893 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 894 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */ 895 bfd_getl64, bfd_getl_signed_64, bfd_putl64, 896 bfd_getl32, bfd_getl_signed_32, bfd_putl32, 897 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */ 898 899 /* Note that we allow an object file to be treated as a core file as well. */ 900 {_bfd_dummy_target, coff_object_p, /* bfd_check_format. */ 901 bfd_generic_archive_p, coff_object_p}, 902 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */ 903 bfd_false}, 904 {bfd_false, coff_write_object_contents, /* bfd_write_contents. */ 905 _bfd_write_archive_contents, bfd_false}, 906 907 BFD_JUMP_TABLE_GENERIC (coff), 908 BFD_JUMP_TABLE_COPY (coff), 909 BFD_JUMP_TABLE_CORE (_bfd_nocore), 910 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), 911 BFD_JUMP_TABLE_SYMBOLS (coff), 912 BFD_JUMP_TABLE_RELOCS (coff), 913 BFD_JUMP_TABLE_WRITE (coff), 914 BFD_JUMP_TABLE_LINK (coff), 915 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 916 917 NULL, 918 919 COFF_SWAP_TABLE 920}; 921