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 }; 1001