1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923
|
/* BFD back-end for MIPS PE COFF files.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
Modified from coff-i386.c by DJ Delorie, dj@cygnus.com
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#define COFF_WITH_PE
/* pei-mips.c may have defined this to default off (0) before
including this file, so don't redefine if that's the case.
Otherwise we're generating objects, not executable images,
so we want to define it to default on. */
#ifndef COFF_LONG_SECTION_NAMES
#define COFF_LONG_SECTION_NAMES
#endif /* COFF_LONG_SECTION_NAMES */
#define PCRELOFFSET TRUE
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "coff/mipspe.h"
#include "coff/internal.h"
#include "coff/pe.h"
#include "libcoff.h"
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 2
/* The page size is a guess based on ELF. */
#define COFF_PAGE_SIZE 0x1000
/* For some reason when using mips COFF the value stored in the .text
section for a reference to a common symbol is the value itself plus
any desired offset. Ian Taylor, Cygnus Support. */
/* If we are producing relocatable output, we need to do some
adjustments to the object file that are not done by the
bfd_perform_relocation function. This function is called by every
reloc type to make any required adjustments. */
static bfd_reloc_status_type
coff_mips_reloc (bfd *abfd,
arelent *reloc_entry,
asymbol *symbol,
void * data,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
symvalue diff;
if (output_bfd == NULL)
return bfd_reloc_continue;
if (bfd_is_com_section (symbol->section))
{
#ifndef COFF_WITH_PE
/* We are relocating a common symbol. The current value in the
object file is ORIG + OFFSET, where ORIG is the value of the
common symbol as seen by the object file when it was compiled
(this may be zero if the symbol was undefined) and OFFSET is
the offset into the common symbol (normally zero, but may be
non-zero when referring to a field in a common structure).
ORIG is the negative of reloc_entry->addend, which is set by
the CALC_ADDEND macro below. We want to replace the value in
the object file with NEW + OFFSET, where NEW is the value of
the common symbol which we are going to put in the final
object file. NEW is symbol->value. */
diff = symbol->value + reloc_entry->addend;
#else
/* In PE mode, we do not offset the common symbol. */
diff = reloc_entry->addend;
#endif
}
else
/* For some reason bfd_perform_relocation always effectively
ignores the addend for a COFF target when producing
relocatable output. This seems to be always wrong for 386
COFF, so we handle the addend here instead. */
diff = reloc_entry->addend;
#define DOIT(x) \
x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask))
if (diff != 0)
{
reloc_howto_type *howto = reloc_entry->howto;
unsigned char *addr = (unsigned char *) data + reloc_entry->address;
switch (howto->size)
{
case 0:
{
char x = bfd_get_8 (abfd, addr);
DOIT (x);
bfd_put_8 (abfd, x, addr);
}
break;
case 1:
{
short x = bfd_get_16 (abfd, addr);
DOIT (x);
bfd_put_16 (abfd, (bfd_vma) x, addr);
}
break;
case 2:
{
long x = bfd_get_32 (abfd, addr);
DOIT (x);
bfd_put_32 (abfd, (bfd_vma) x, addr);
}
break;
default:
abort ();
}
}
/* Now let bfd_perform_relocation finish everything up. */
return bfd_reloc_continue;
}
#ifdef COFF_WITH_PE
/* Return TRUE if this relocation should
appear in the output .reloc section. */
static bfd_boolean
in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
{
return ! howto->pc_relative && howto->type != MIPS_R_RVA;
}
#endif
#ifndef PCRELOFFSET
#define PCRELOFFSET FALSE
#endif
static reloc_howto_type howto_table[] =
{
/* Reloc type 0 is ignored. The reloc reading code ensures that
this is a reference to the .abs section, which will cause
bfd_perform_relocation to do nothing. */
HOWTO (MIPS_R_ABSOLUTE, /* Type. */
0, /* Rightshift. */
0, /* Size (0 = byte, 1 = short, 2 = long). */
8, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_dont, /* Complain_on_overflow. */
0, /* Special_function. */
"IGNORE", /* Name. */
FALSE, /* Partial_inplace. */
0, /* Src_mask. */
0, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
/* A 16 bit reference to a symbol, normally from a data section. */
HOWTO (MIPS_R_REFHALF, /* Type. */
0, /* Rightshift. */
1, /* Size (0 = byte, 1 = short, 2 = long). */
16, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_bitfield, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"REFHALF", /* Name. */
TRUE, /* Partial_inplace. */
0xffff, /* Src_mask. */
0xffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
/* A 32 bit reference to a symbol, normally from a data section. */
HOWTO (MIPS_R_REFWORD, /* Type. */
0, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
32, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_bitfield, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"REFWORD", /* Name. */
TRUE, /* Partial_inplace. */
0xffffffff, /* Src_mask. */
0xffffffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
/* A 26 bit absolute jump address. */
HOWTO (MIPS_R_JMPADDR, /* Type. */
2, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
26, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_dont, /* Complain_on_overflow. */
/* This needs complex overflow
detection, because the upper four
bits must match the PC. */
coff_mips_reloc, /* Special_function. */
"JMPADDR", /* Name. */
TRUE, /* Partial_inplace. */
0x3ffffff, /* Src_mask. */
0x3ffffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
/* The high 16 bits of a symbol value. Handled by the function
mips_refhi_reloc. */
HOWTO (MIPS_R_REFHI, /* Type. */
16, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
16, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_bitfield, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"REFHI", /* Name. */
TRUE, /* Partial_inplace. */
0xffff, /* Src_mask. */
0xffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
/* The low 16 bits of a symbol value. */
HOWTO (MIPS_R_REFLO, /* Type. */
0, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
16, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_dont, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"REFLO", /* Name. */
TRUE, /* Partial_inplace. */
0xffff, /* Src_mask. */
0xffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
/* A reference to an offset from the gp register. Handled by the
function mips_gprel_reloc. */
HOWTO (MIPS_R_GPREL, /* Type. */
0, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
16, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_signed, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"GPREL", /* Name. */
TRUE, /* Partial_inplace. */
0xffff, /* Src_mask. */
0xffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
/* A reference to a literal using an offset from the gp register.
Handled by the function mips_gprel_reloc. */
HOWTO (MIPS_R_LITERAL, /* Type. */
0, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
16, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_signed, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"LITERAL", /* Name. */
TRUE, /* Partial_inplace. */
0xffff, /* Src_mask. */
0xffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
EMPTY_HOWTO (8),
EMPTY_HOWTO (9),
EMPTY_HOWTO (10),
EMPTY_HOWTO (11),
EMPTY_HOWTO (12),
EMPTY_HOWTO (13),
EMPTY_HOWTO (14),
EMPTY_HOWTO (15),
EMPTY_HOWTO (16),
EMPTY_HOWTO (17),
EMPTY_HOWTO (18),
EMPTY_HOWTO (19),
EMPTY_HOWTO (20),
EMPTY_HOWTO (21),
EMPTY_HOWTO (22),
EMPTY_HOWTO (23),
EMPTY_HOWTO (24),
EMPTY_HOWTO (25),
EMPTY_HOWTO (26),
EMPTY_HOWTO (27),
EMPTY_HOWTO (28),
EMPTY_HOWTO (29),
EMPTY_HOWTO (30),
EMPTY_HOWTO (31),
EMPTY_HOWTO (32),
EMPTY_HOWTO (33),
HOWTO (MIPS_R_RVA, /* Type. */
0, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
32, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_bitfield, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"rva32", /* Name. */
TRUE, /* Partial_inplace. */
0xffffffff, /* Src_mask. */
0xffffffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
EMPTY_HOWTO (35),
EMPTY_HOWTO (36),
HOWTO (MIPS_R_PAIR, /* Type. */
0, /* Rightshift. */
2, /* Size (0 = byte, 1 = short, 2 = long). */
32, /* Bitsize. */
FALSE, /* PC_relative. */
0, /* Bitpos. */
complain_overflow_bitfield, /* Complain_on_overflow. */
coff_mips_reloc, /* Special_function. */
"PAIR", /* Name. */
TRUE, /* Partial_inplace. */
0xffffffff, /* Src_mask. */
0xffffffff, /* Dst_mask. */
FALSE), /* Pcrel_offset. */
};
/* Turn a howto into a reloc nunmber. */
#define SELECT_RELOC(x, howto) { x.r_type = howto->type; }
#define BADMAG(x) MIPSBADMAG (x)
/* Customize coffcode.h. */
#define MIPS 1
#define RTYPE2HOWTO(cache_ptr, dst) \
(cache_ptr)->howto = howto_table + (dst)->r_type;
/* Compute the addend of a reloc. If the reloc is to a common symbol,
the object file contains the value of the common symbol. By the
time this is called, the linker may be using a different symbol
from a different object file with a different value. Therefore, we
hack wildly to locate the original symbol from this file so that we
can make the correct adjustment. This macro sets coffsym to the
symbol from the original file, and uses it to set the addend value
correctly. If this is not a common symbol, the usual addend
calculation is done, except that an additional tweak is needed for
PC relative relocs.
FIXME: This macro refers to symbols and asect; these are from the
calling function, not the macro arguments. */
#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
{ \
coff_symbol_type *coffsym = NULL; \
if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
coffsym = (obj_symbols (abfd) \
+ (cache_ptr->sym_ptr_ptr - symbols)); \
else if (ptr) \
coffsym = coff_symbol_from (abfd, ptr); \
if (coffsym != NULL \
&& coffsym->native->u.syment.n_scnum == 0) \
cache_ptr->addend = - coffsym->native->u.syment.n_value; \
else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
&& ptr->section != NULL) \
cache_ptr->addend = - (ptr->section->vma + ptr->value); \
else \
cache_ptr->addend = 0; \
if (ptr && howto_table[reloc.r_type].pc_relative) \
cache_ptr->addend += asect->vma; \
}
/* Convert an rtype to howto for the COFF backend linker. */
static reloc_howto_type *
coff_mips_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec,
struct internal_reloc *rel,
struct coff_link_hash_entry *h,
struct internal_syment *sym,
bfd_vma *addendp)
{
reloc_howto_type *howto;
howto = howto_table + rel->r_type;
#ifdef COFF_WITH_PE
*addendp = 0;
#endif
if (howto->pc_relative)
*addendp += sec->vma;
if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
{
/* This is a common symbol. The section contents include the
size (sym->n_value) as an addend. The relocate_section
function will be adding in the final value of the symbol. We
need to subtract out the current size in order to get the
correct result. */
BFD_ASSERT (h != NULL);
#ifndef COFF_WITH_PE
/* I think we *do* want to bypass this. If we don't, I have
seen some data parameters get the wrong relocation address.
If I link two versions with and without this section bypassed
and then do a binary comparison, the addresses which are
different can be looked up in the map. The case in which
this section has been bypassed has addresses which correspond
to values I can find in the map. */
*addendp -= sym->n_value;
#endif
}
#ifndef COFF_WITH_PE
/* If the output symbol is common (in which case this must be a
relocatable link), we need to add in the final size of the
common symbol. */
if (h != NULL && h->root.type == bfd_link_hash_common)
*addendp += h->root.u.c.size;
#endif
#ifdef COFF_WITH_PE
if (howto->pc_relative)
{
*addendp -= 4;
/* If the symbol is defined, then the generic code is going to
add back the symbol value in order to cancel out an
adjustment it made to the addend. However, we set the addend
to 0 at the start of this function. We need to adjust here,
to avoid the adjustment the generic code will make. FIXME:
This is getting a bit hackish. */
if (sym != NULL && sym->n_scnum != 0)
*addendp -= sym->n_value;
}
if (rel->r_type == MIPS_R_RVA)
*addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
#endif
return howto;
}
#define coff_rtype_to_howto coff_mips_rtype_to_howto
#define coff_bfd_reloc_type_lookup coff_mips_reloc_type_lookup
#define coff_bfd_reloc_name_lookup coff_mips_reloc_name_lookup
/* Get the howto structure for a generic reloc type. */
static reloc_howto_type *
coff_mips_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
int mips_type;
switch (code)
{
case BFD_RELOC_16:
mips_type = MIPS_R_REFHALF;
break;
case BFD_RELOC_32:
case BFD_RELOC_CTOR:
mips_type = MIPS_R_REFWORD;
break;
case BFD_RELOC_MIPS_JMP:
mips_type = MIPS_R_JMPADDR;
break;
case BFD_RELOC_HI16_S:
mips_type = MIPS_R_REFHI;
break;
case BFD_RELOC_LO16:
mips_type = MIPS_R_REFLO;
break;
case BFD_RELOC_GPREL16:
mips_type = MIPS_R_GPREL;
break;
case BFD_RELOC_MIPS_LITERAL:
mips_type = MIPS_R_LITERAL;
break;
case BFD_RELOC_RVA:
mips_type = MIPS_R_RVA;
break;
default:
return NULL;
}
return & howto_table [mips_type];
}
static reloc_howto_type *
coff_mips_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
const char *r_name)
{
unsigned int i;
for (i = 0;
i < sizeof (howto_table) / sizeof (howto_table[0]);
i++)
if (howto_table[i].name != NULL
&& strcasecmp (howto_table[i].name, r_name) == 0)
return &howto_table[i];
return NULL;
}
static void
mips_swap_reloc_in (bfd * abfd, void * src, void * dst)
{
static struct internal_reloc pair_prev;
RELOC *reloc_src = (RELOC *) src;
struct internal_reloc *reloc_dst = (struct internal_reloc *) dst;
reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr);
reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx);
reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type);
reloc_dst->r_size = 0;
reloc_dst->r_extern = 0;
reloc_dst->r_offset = 0;
switch (reloc_dst->r_type)
{
case MIPS_R_REFHI:
pair_prev = *reloc_dst;
break;
case MIPS_R_PAIR:
reloc_dst->r_offset = reloc_dst->r_symndx;
if (reloc_dst->r_offset & 0x8000)
reloc_dst->r_offset -= 0x10000;
reloc_dst->r_symndx = pair_prev.r_symndx;
break;
}
}
static unsigned int
mips_swap_reloc_out (bfd * abfd, void * src, void * dst)
{
static bfd_vma prev_addr = 0;
struct internal_reloc *reloc_src = (struct internal_reloc *)src;
struct external_reloc *reloc_dst = (struct external_reloc *)dst;
switch (reloc_src->r_type)
{
case MIPS_R_REFHI:
prev_addr = reloc_src->r_vaddr;
break;
case MIPS_R_REFLO:
if (reloc_src->r_vaddr == prev_addr)
{
/* FIXME: only slightly hackish. If we see a REFLO pointing to
the same address as a REFHI, we assume this is the matching
PAIR reloc and output it accordingly. The symndx is really
the low 16 bits of the addend */
H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
H_PUT_16 (abfd, MIPS_R_PAIR, reloc_dst->r_type);
return RELSZ;
}
break;
}
H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type);
return RELSZ;
}
#define coff_swap_reloc_in mips_swap_reloc_in
#define coff_swap_reloc_out mips_swap_reloc_out
#define NO_COFF_RELOCS
static bfd_boolean
coff_pe_mips_relocate_section (bfd *output_bfd,
struct bfd_link_info *info,
bfd *input_bfd,
asection *input_section,
bfd_byte *contents,
struct internal_reloc *relocs,
struct internal_syment *syms,
asection **sections)
{
struct internal_reloc *rel;
struct internal_reloc *rel_end;
unsigned int i;
if (info->relocatable)
{
(*_bfd_error_handler)
(_("%B: `ld -r' not supported with PE MIPS objects\n"), input_bfd);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
BFD_ASSERT (input_bfd->xvec->byteorder
== output_bfd->xvec->byteorder);
rel = relocs;
rel_end = rel + input_section->reloc_count;
for (i = 0; rel < rel_end; rel++, i++)
{
long symndx;
struct coff_link_hash_entry *h;
struct internal_syment *sym;
bfd_vma addend = 0;
bfd_vma val, tmp, targ, src, low;
reloc_howto_type *howto;
unsigned char *mem = contents + rel->r_vaddr;
symndx = rel->r_symndx;
if (symndx == -1)
{
h = NULL;
sym = NULL;
}
else
{
h = obj_coff_sym_hashes (input_bfd)[symndx];
sym = syms + symndx;
}
/* COFF treats common symbols in one of two ways. Either the
size of the symbol is included in the section contents, or it
is not. We assume that the size is not included, and force
the rtype_to_howto function to adjust the addend as needed. */
if (sym != NULL && sym->n_scnum != 0)
addend = - sym->n_value;
else
addend = 0;
howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
sym, &addend);
if (howto == NULL)
return FALSE;
/* If we are doing a relocatable link, then we can just ignore
a PC relative reloc that is pcrel_offset. It will already
have the correct value. If this is not a relocatable link,
then we should ignore the symbol value. */
if (howto->pc_relative && howto->pcrel_offset)
{
if (info->relocatable)
continue;
if (sym != NULL && sym->n_scnum != 0)
addend += sym->n_value;
}
val = 0;
if (h == NULL)
{
asection *sec;
if (symndx == -1)
{
sec = bfd_abs_section_ptr;
val = 0;
}
else
{
sec = sections[symndx];
val = (sec->output_section->vma
+ sec->output_offset
+ sym->n_value);
if (! obj_pe (input_bfd))
val -= sec->vma;
}
}
else
{
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
asection *sec;
sec = h->root.u.def.section;
val = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (! info->relocatable)
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd, input_section,
rel->r_vaddr - input_section->vma, TRUE)))
return FALSE;
}
}
src = rel->r_vaddr + input_section->output_section->vma
+ input_section->output_offset;
/* OK, at this point the following variables are set up:
src = VMA of the memory we're fixing up
mem = pointer to memory we're fixing up
val = VMA of what we need to refer to. */
#define UI(x) (*_bfd_error_handler) (_("%B: unimplemented %s\n"), \
input_bfd, x); \
bfd_set_error (bfd_error_bad_value);
switch (rel->r_type)
{
case MIPS_R_ABSOLUTE:
/* Ignore these. */
break;
case MIPS_R_REFHALF:
UI ("refhalf");
break;
case MIPS_R_REFWORD:
tmp = bfd_get_32 (input_bfd, mem);
/* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */
tmp += val;
bfd_put_32 (input_bfd, tmp, mem);
break;
case MIPS_R_JMPADDR:
tmp = bfd_get_32 (input_bfd, mem);
targ = val + (tmp & 0x03ffffff) * 4;
if ((src & 0xf0000000) != (targ & 0xf0000000))
{
(*_bfd_error_handler) (_("%B: jump too far away\n"), input_bfd);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
tmp &= 0xfc000000;
tmp |= (targ / 4) & 0x3ffffff;
bfd_put_32 (input_bfd, tmp, mem);
break;
case MIPS_R_REFHI:
tmp = bfd_get_32 (input_bfd, mem);
switch (rel[1].r_type)
{
case MIPS_R_PAIR:
/* MS PE object */
targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16);
break;
case MIPS_R_REFLO:
/* GNU COFF object */
low = bfd_get_32 (input_bfd, contents + rel[1].r_vaddr);
low &= 0xffff;
if (low & 0x8000)
low -= 0x10000;
targ = val + low + ((tmp & 0xffff) << 16);
break;
default:
(*_bfd_error_handler) (_("%B: bad pair/reflo after refhi\n"),
input_bfd);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
tmp &= 0xffff0000;
tmp |= (targ >> 16) & 0xffff;
bfd_put_32 (input_bfd, tmp, mem);
break;
case MIPS_R_REFLO:
tmp = bfd_get_32 (input_bfd, mem);
targ = val + (tmp & 0xffff);
/* printf ("refword: src=%08x targ=%08x\n", src, targ); */
tmp &= 0xffff0000;
tmp |= targ & 0xffff;
bfd_put_32 (input_bfd, tmp, mem);
break;
case MIPS_R_GPREL:
case MIPS_R_LITERAL:
UI ("gprel");
break;
case MIPS_R_SECTION:
UI ("section");
break;
case MIPS_R_SECREL:
UI ("secrel");
break;
case MIPS_R_SECRELLO:
UI ("secrello");
break;
case MIPS_R_SECRELHI:
UI ("secrelhi");
break;
case MIPS_R_RVA:
tmp = bfd_get_32 (input_bfd, mem);
/* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */
tmp += val
- pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase;
bfd_put_32 (input_bfd, tmp, mem);
break;
case MIPS_R_PAIR:
/* ignore these */
break;
}
}
return TRUE;
}
#define coff_relocate_section coff_pe_mips_relocate_section
#ifdef TARGET_UNDERSCORE
/* If mips gcc uses underscores for symbol names, then it does not use
a leading dot for local labels, so if TARGET_UNDERSCORE is defined
we treat all symbols starting with L as local. */
static bfd_boolean
coff_mips_is_local_label_name (bfd *abfd, const char *name)
{
if (name[0] == 'L')
return TRUE;
return _bfd_coff_is_local_label_name (abfd, name);
}
#define coff_bfd_is_local_label_name coff_mips_is_local_label_name
#endif /* TARGET_UNDERSCORE */
#define COFF_NO_HACK_SCNHDR_SIZE
#ifndef bfd_pe_print_pdata
#define bfd_pe_print_pdata NULL
#endif
#include "coffcode.h"
const bfd_target
#ifdef TARGET_SYM
TARGET_SYM =
#else
mipslpe_vec =
#endif
{
#ifdef TARGET_NAME
TARGET_NAME,
#else
"pe-mips", /* Name. */
#endif
bfd_target_coff_flavour,
BFD_ENDIAN_LITTLE, /* Data byte order is little. */
BFD_ENDIAN_LITTLE, /* Header byte order is little. */
(HAS_RELOC | EXEC_P | /* Object flags. */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
#ifndef COFF_WITH_PE
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
| SEC_CODE | SEC_DATA),
#else
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags. */
| SEC_CODE | SEC_DATA
| SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
#endif
#ifdef TARGET_UNDERSCORE
TARGET_UNDERSCORE, /* Leading underscore. */
#else
0, /* leading underscore */
#endif
'/', /* AR_pad_char. */
15, /* AR_max_namelen. */
0, /* match priority. */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */
/* Note that we allow an object file to be treated as a core file as well. */
{_bfd_dummy_target, coff_object_p, /* bfd_check_format. */
bfd_generic_archive_p, coff_object_p},
{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format. */
bfd_false},
{bfd_false, coff_write_object_contents, /* bfd_write_contents. */
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (coff),
BFD_JUMP_TABLE_COPY (coff),
BFD_JUMP_TABLE_CORE (_bfd_nocore),
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
BFD_JUMP_TABLE_SYMBOLS (coff),
BFD_JUMP_TABLE_RELOCS (coff),
BFD_JUMP_TABLE_WRITE (coff),
BFD_JUMP_TABLE_LINK (coff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
NULL,
COFF_SWAP_TABLE
};
|