bfd/pe-mips.c

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