bfd/pe-mips.c

   1 /* BFD back-end for MIPS PE COFF files.
   2    Copyright (C) 1990-2014 Free Software Foundation, Inc.
   3    Modified from coff-i386.c by DJ Delorie, dj@cygnus.com
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #define COFF_WITH_PE
  23 /* pei-mips.c may have defined this to default off (0) before
  24   including this file, so don't redefine if that's the case.
  25   Otherwise we're generating objects, not executable images,
  26   so we want to define it to default on.  */
  27 #ifndef COFF_LONG_SECTION_NAMES
  28 #define COFF_LONG_SECTION_NAMES
  29 #endif /* COFF_LONG_SECTION_NAMES */
  30 #define PCRELOFFSET TRUE
  31
  32 #include "sysdep.h"
  33 #include "bfd.h"
  34 #include "libbfd.h"
  35 #include "coff/mipspe.h"
  36 #include "coff/internal.h"
  37 #include "coff/pe.h"
  38 #include "libcoff.h"
  39
  40 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 2
  41 /* The page size is a guess based on ELF.  */
  42
  43 #define COFF_PAGE_SIZE 0x1000
  44
  45 /* For some reason when using mips COFF the value stored in the .text
  46    section for a reference to a common symbol is the value itself plus
  47    any desired offset.  Ian Taylor, Cygnus Support.  */
  48
  49 /* If we are producing relocatable output, we need to do some
  50    adjustments to the object file that are not done by the
  51    bfd_perform_relocation function.  This function is called by every
  52    reloc type to make any required adjustments.  */
  53
  54 static bfd_reloc_status_type
  55 coff_mips_reloc (bfd *abfd,
  56                  arelent *reloc_entry,
  57                  asymbol *symbol,
  58                  void * data,
  59                  asection *input_section ATTRIBUTE_UNUSED,
  60                  bfd *output_bfd,
  61                  char **error_message ATTRIBUTE_UNUSED)
  62 {
  63   symvalue diff;
  64
  65   if (output_bfd == NULL)
  66     return bfd_reloc_continue;
  67
  68   if (bfd_is_com_section (symbol->section))
  69     {
  70 #ifndef COFF_WITH_PE
  71       /* We are relocating a common symbol.  The current value in the
  72          object file is ORIG + OFFSET, where ORIG is the value of the
  73          common symbol as seen by the object file when it was compiled
  74          (this may be zero if the symbol was undefined) and OFFSET is
  75          the offset into the common symbol (normally zero, but may be
  76          non-zero when referring to a field in a common structure).
  77          ORIG is the negative of reloc_entry->addend, which is set by
  78          the CALC_ADDEND macro below.  We want to replace the value in
  79          the object file with NEW + OFFSET, where NEW is the value of
  80          the common symbol which we are going to put in the final
  81          object file.  NEW is symbol->value.  */
  82       diff = symbol->value + reloc_entry->addend;
  83 #else
  84       /* In PE mode, we do not offset the common symbol.  */
  85       diff = reloc_entry->addend;
  86 #endif
  87     }
  88   else
  89     /* For some reason bfd_perform_relocation always effectively
  90        ignores the addend for a COFF target when producing
  91        relocatable output.  This seems to be always wrong for 386
  92        COFF, so we handle the addend here instead.  */
  93     diff = reloc_entry->addend;
  94
  95 #define DOIT(x) \
  96   x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + (diff >> howto->rightshift)) & howto->dst_mask))
  97
  98     if (diff != 0)
  99       {
 100         reloc_howto_type *howto = reloc_entry->howto;
 101         unsigned char *addr = (unsigned char *) data + reloc_entry->address;
 102
 103         switch (howto->size)
 104           {
 105           case 0:
 106             {
 107               char x = bfd_get_8 (abfd, addr);
 108
 109               DOIT (x);
 110               bfd_put_8 (abfd, x, addr);
 111             }
 112             break;
 113
 114           case 1:
 115             {
 116               short x = bfd_get_16 (abfd, addr);
 117
 118               DOIT (x);
 119               bfd_put_16 (abfd, (bfd_vma) x, addr);
 120             }
 121             break;
 122
 123           case 2:
 124             {
 125               long x = bfd_get_32 (abfd, addr);
 126
 127               DOIT (x);
 128               bfd_put_32 (abfd, (bfd_vma) x, addr);
 129             }
 130             break;
 131
 132           default:
 133             abort ();
 134           }
 135       }
 136
 137   /* Now let bfd_perform_relocation finish everything up.  */
 138   return bfd_reloc_continue;
 139 }
 140
 141 #ifdef COFF_WITH_PE
 142 /* Return TRUE if this relocation should
 143    appear in the output .reloc section.  */
 144
 145 static bfd_boolean
 146 in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
 147 {
 148   return ! howto->pc_relative && howto->type != MIPS_R_RVA;
 149 }
 150 #endif
 151
 152 #ifndef PCRELOFFSET
 153 #define PCRELOFFSET FALSE
 154 #endif
 155
 156 static reloc_howto_type howto_table[] =
 157 {
 158   /* Reloc type 0 is ignored.  The reloc reading code ensures that
 159      this is a reference to the .abs section, which will cause
 160      bfd_perform_relocation to do nothing.  */
 161   HOWTO (MIPS_R_ABSOLUTE,       /* Type.  */
 162          0,                     /* Rightshift.  */
 163          0,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 164          8,                     /* Bitsize.  */
 165          FALSE,                 /* PC_relative.  */
 166          0,                     /* Bitpos. */
 167          complain_overflow_dont, /* Complain_on_overflow. */
 168          0,                     /* Special_function. */
 169          "IGNORE",              /* Name. */
 170          FALSE,                 /* Partial_inplace. */
 171          0,                     /* Src_mask. */
 172          0,                     /* Dst_mask. */
 173          FALSE),                /* Pcrel_offset. */
 174
 175   /* A 16 bit reference to a symbol, normally from a data section.  */
 176   HOWTO (MIPS_R_REFHALF,        /* Type.  */
 177          0,                     /* Rightshift.  */
 178          1,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 179          16,                    /* Bitsize.  */
 180          FALSE,                 /* PC_relative.  */
 181          0,                     /* Bitpos. */
 182          complain_overflow_bitfield, /* Complain_on_overflow. */
 183          coff_mips_reloc,       /* Special_function. */
 184          "REFHALF",             /* Name. */
 185          TRUE,                  /* Partial_inplace. */
 186          0xffff,                /* Src_mask. */
 187          0xffff,                /* Dst_mask. */
 188          FALSE),                /* Pcrel_offset. */
 189
 190   /* A 32 bit reference to a symbol, normally from a data section.  */
 191   HOWTO (MIPS_R_REFWORD,        /* Type.  */
 192          0,                     /* Rightshift.  */
 193          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 194          32,                    /* Bitsize.  */
 195          FALSE,                 /* PC_relative.  */
 196          0,                     /* Bitpos. */
 197          complain_overflow_bitfield, /* Complain_on_overflow. */
 198          coff_mips_reloc,       /* Special_function. */
 199          "REFWORD",             /* Name. */
 200          TRUE,                  /* Partial_inplace. */
 201          0xffffffff,            /* Src_mask. */
 202          0xffffffff,            /* Dst_mask. */
 203          FALSE),                /* Pcrel_offset. */
 204
 205   /* A 26 bit absolute jump address.  */
 206   HOWTO (MIPS_R_JMPADDR,        /* Type.  */
 207          2,                     /* Rightshift.  */
 208          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 209          26,                    /* Bitsize.  */
 210          FALSE,                 /* PC_relative.  */
 211          0,                     /* Bitpos. */
 212          complain_overflow_dont, /* Complain_on_overflow. */
 213                                 /* This needs complex overflow
 214                                    detection, because the upper four
 215                                    bits must match the PC.  */
 216          coff_mips_reloc,       /* Special_function. */
 217          "JMPADDR",             /* Name. */
 218          TRUE,                  /* Partial_inplace. */
 219          0x3ffffff,             /* Src_mask. */
 220          0x3ffffff,             /* Dst_mask. */
 221          FALSE),                /* Pcrel_offset. */
 222
 223   /* The high 16 bits of a symbol value.  Handled by the function
 224      mips_refhi_reloc.  */
 225   HOWTO (MIPS_R_REFHI,          /* Type.  */
 226          16,                    /* Rightshift.  */
 227          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 228          16,                    /* Bitsize.  */
 229          FALSE,                 /* PC_relative.  */
 230          0,                     /* Bitpos. */
 231          complain_overflow_bitfield, /* Complain_on_overflow. */
 232          coff_mips_reloc,       /* Special_function. */
 233          "REFHI",               /* Name. */
 234          TRUE,                  /* Partial_inplace. */
 235          0xffff,                /* Src_mask. */
 236          0xffff,                /* Dst_mask. */
 237          FALSE),                /* Pcrel_offset. */
 238
 239   /* The low 16 bits of a symbol value.  */
 240   HOWTO (MIPS_R_REFLO,          /* Type.  */
 241          0,                     /* Rightshift.  */
 242          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 243          16,                    /* Bitsize.  */
 244          FALSE,                 /* PC_relative.  */
 245          0,                     /* Bitpos. */
 246          complain_overflow_dont, /* Complain_on_overflow. */
 247          coff_mips_reloc,       /* Special_function. */
 248          "REFLO",               /* Name. */
 249          TRUE,                  /* Partial_inplace. */
 250          0xffff,                /* Src_mask. */
 251          0xffff,                /* Dst_mask. */
 252          FALSE),                /* Pcrel_offset. */
 253
 254   /* A reference to an offset from the gp register.  Handled by the
 255      function mips_gprel_reloc.  */
 256   HOWTO (MIPS_R_GPREL,          /* Type.  */
 257          0,                     /* Rightshift.  */
 258          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 259          16,                    /* Bitsize.  */
 260          FALSE,                 /* PC_relative.  */
 261          0,                     /* Bitpos. */
 262          complain_overflow_signed, /* Complain_on_overflow. */
 263          coff_mips_reloc,       /* Special_function. */
 264          "GPREL",               /* Name. */
 265          TRUE,                  /* Partial_inplace. */
 266          0xffff,                /* Src_mask. */
 267          0xffff,                /* Dst_mask. */
 268          FALSE),                /* Pcrel_offset. */
 269
 270   /* A reference to a literal using an offset from the gp register.
 271      Handled by the function mips_gprel_reloc.  */
 272   HOWTO (MIPS_R_LITERAL,        /* Type.  */
 273          0,                     /* Rightshift.  */
 274          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 275          16,                    /* Bitsize.  */
 276          FALSE,                 /* PC_relative.  */
 277          0,                     /* Bitpos. */
 278          complain_overflow_signed, /* Complain_on_overflow. */
 279          coff_mips_reloc,       /* Special_function. */
 280          "LITERAL",             /* Name. */
 281          TRUE,                  /* Partial_inplace. */
 282          0xffff,                /* Src_mask. */
 283          0xffff,                /* Dst_mask. */
 284          FALSE),                /* Pcrel_offset. */
 285
 286   EMPTY_HOWTO (8),
 287   EMPTY_HOWTO (9),
 288   EMPTY_HOWTO (10),
 289   EMPTY_HOWTO (11),
 290   EMPTY_HOWTO (12),
 291   EMPTY_HOWTO (13),
 292   EMPTY_HOWTO (14),
 293   EMPTY_HOWTO (15),
 294   EMPTY_HOWTO (16),
 295   EMPTY_HOWTO (17),
 296   EMPTY_HOWTO (18),
 297   EMPTY_HOWTO (19),
 298   EMPTY_HOWTO (20),
 299   EMPTY_HOWTO (21),
 300   EMPTY_HOWTO (22),
 301   EMPTY_HOWTO (23),
 302   EMPTY_HOWTO (24),
 303   EMPTY_HOWTO (25),
 304   EMPTY_HOWTO (26),
 305   EMPTY_HOWTO (27),
 306   EMPTY_HOWTO (28),
 307   EMPTY_HOWTO (29),
 308   EMPTY_HOWTO (30),
 309   EMPTY_HOWTO (31),
 310   EMPTY_HOWTO (32),
 311   EMPTY_HOWTO (33),
 312   HOWTO (MIPS_R_RVA,            /* Type.  */
 313          0,                     /* Rightshift.  */
 314          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 315          32,                    /* Bitsize.  */
 316          FALSE,                 /* PC_relative.  */
 317          0,                     /* Bitpos. */
 318          complain_overflow_bitfield, /* Complain_on_overflow. */
 319          coff_mips_reloc,       /* Special_function. */
 320          "rva32",               /* Name. */
 321          TRUE,                  /* Partial_inplace. */
 322          0xffffffff,            /* Src_mask. */
 323          0xffffffff,            /* Dst_mask. */
 324          FALSE),                /* Pcrel_offset. */
 325   EMPTY_HOWTO (35),
 326   EMPTY_HOWTO (36),
 327   HOWTO (MIPS_R_PAIR,           /* Type.  */
 328          0,                     /* Rightshift.  */
 329          2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
 330          32,                    /* Bitsize.  */
 331          FALSE,                 /* PC_relative.  */
 332          0,                     /* Bitpos. */
 333          complain_overflow_bitfield, /* Complain_on_overflow. */
 334          coff_mips_reloc,       /* Special_function. */
 335          "PAIR",                /* Name. */
 336          TRUE,                  /* Partial_inplace. */
 337          0xffffffff,            /* Src_mask. */
 338          0xffffffff,            /* Dst_mask. */
 339          FALSE),                /* Pcrel_offset. */
 340 };
 341
 342 #define NUM_HOWTOS (sizeof (howto_table) / sizeof (howto_table[0]))
 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 && reloc.r_type < NUM_HOWTOS                        \
 385         && howto_table[reloc.r_type].pc_relative)               \
 386       cache_ptr->addend += asect->vma;                          \
 387   }
 388
 389 /* Convert an rtype to howto for the COFF backend linker.  */
 390
 391 static reloc_howto_type *
 392 coff_mips_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
 393                           asection *sec,
 394                           struct internal_reloc *rel,
 395                           struct coff_link_hash_entry *h,
 396                           struct internal_syment *sym,
 397                           bfd_vma *addendp)
 398 {
 399
 400   reloc_howto_type *howto;
 401
 402   howto = howto_table + rel->r_type;
 403
 404 #ifdef COFF_WITH_PE
 405   *addendp = 0;
 406 #endif
 407
 408   if (howto->pc_relative)
 409     *addendp += sec->vma;
 410
 411   if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
 412     {
 413       /* This is a common symbol.  The section contents include the
 414          size (sym->n_value) as an addend.  The relocate_section
 415          function will be adding in the final value of the symbol.  We
 416          need to subtract out the current size in order to get the
 417          correct result.  */
 418
 419       BFD_ASSERT (h != NULL);
 420
 421 #ifndef COFF_WITH_PE
 422       /* I think we *do* want to bypass this.  If we don't, I have
 423          seen some data parameters get the wrong relocation address.
 424          If I link two versions with and without this section bypassed
 425          and then do a binary comparison, the addresses which are
 426          different can be looked up in the map.  The case in which
 427          this section has been bypassed has addresses which correspond
 428          to values I can find in the map.  */
 429       *addendp -= sym->n_value;
 430 #endif
 431     }
 432
 433 #ifndef COFF_WITH_PE
 434   /* If the output symbol is common (in which case this must be a
 435      relocatable link), we need to add in the final size of the
 436      common symbol.  */
 437   if (h != NULL && h->root.type == bfd_link_hash_common)
 438     *addendp += h->root.u.c.size;
 439 #endif
 440
 441 #ifdef COFF_WITH_PE
 442   if (howto->pc_relative)
 443     {
 444       *addendp -= 4;
 445
 446       /* If the symbol is defined, then the generic code is going to
 447          add back the symbol value in order to cancel out an
 448          adjustment it made to the addend.  However, we set the addend
 449          to 0 at the start of this function.  We need to adjust here,
 450          to avoid the adjustment the generic code will make.  FIXME:
 451          This is getting a bit hackish.  */
 452       if (sym != NULL && sym->n_scnum != 0)
 453         *addendp -= sym->n_value;
 454     }
 455
 456   if (rel->r_type == MIPS_R_RVA)
 457     *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
 458 #endif
 459
 460   return howto;
 461 }
 462
 463 #define coff_rtype_to_howto         coff_mips_rtype_to_howto
 464 #define coff_bfd_reloc_type_lookup  coff_mips_reloc_type_lookup
 465 #define coff_bfd_reloc_name_lookup coff_mips_reloc_name_lookup
 466
 467 /* Get the howto structure for a generic reloc type.  */
 468
 469 static reloc_howto_type *
 470 coff_mips_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 471                              bfd_reloc_code_real_type code)
 472 {
 473   int mips_type;
 474
 475   switch (code)
 476     {
 477     case BFD_RELOC_16:
 478       mips_type = MIPS_R_REFHALF;
 479       break;
 480     case BFD_RELOC_32:
 481     case BFD_RELOC_CTOR:
 482       mips_type = MIPS_R_REFWORD;
 483       break;
 484     case BFD_RELOC_MIPS_JMP:
 485       mips_type = MIPS_R_JMPADDR;
 486       break;
 487     case BFD_RELOC_HI16_S:
 488       mips_type = MIPS_R_REFHI;
 489       break;
 490     case BFD_RELOC_LO16:
 491       mips_type = MIPS_R_REFLO;
 492       break;
 493     case BFD_RELOC_GPREL16:
 494       mips_type = MIPS_R_GPREL;
 495       break;
 496     case BFD_RELOC_MIPS_LITERAL:
 497       mips_type = MIPS_R_LITERAL;
 498       break;
 499     case BFD_RELOC_RVA:
 500       mips_type = MIPS_R_RVA;
 501       break;
 502     default:
 503       return NULL;
 504     }
 505
 506   return & howto_table [mips_type];
 507 }
 508
 509 static reloc_howto_type *
 510 coff_mips_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 511                              const char *r_name)
 512 {
 513   unsigned int i;
 514
 515   for (i = 0; i < NUM_HOWTOS; i++)
 516     if (howto_table[i].name != NULL
 517         && strcasecmp (howto_table[i].name, r_name) == 0)
 518       return &howto_table[i];
 519
 520   return NULL;
 521 }
 522
 523 static void
 524 mips_swap_reloc_in (bfd * abfd, void * src, void * dst)
 525 {
 526   static struct internal_reloc pair_prev;
 527   RELOC *reloc_src = (RELOC *) src;
 528   struct internal_reloc *reloc_dst = (struct internal_reloc *) dst;
 529
 530   reloc_dst->r_vaddr = H_GET_32 (abfd, reloc_src->r_vaddr);
 531   reloc_dst->r_symndx = H_GET_S32 (abfd, reloc_src->r_symndx);
 532   reloc_dst->r_type = H_GET_16 (abfd, reloc_src->r_type);
 533   reloc_dst->r_size = 0;
 534   reloc_dst->r_extern = 0;
 535   reloc_dst->r_offset = 0;
 536
 537   switch (reloc_dst->r_type)
 538   {
 539   case MIPS_R_REFHI:
 540     pair_prev = *reloc_dst;
 541     break;
 542   case MIPS_R_PAIR:
 543     reloc_dst->r_offset = reloc_dst->r_symndx;
 544     if (reloc_dst->r_offset & 0x8000)
 545       reloc_dst->r_offset -= 0x10000;
 546     reloc_dst->r_symndx = pair_prev.r_symndx;
 547     break;
 548   }
 549 }
 550
 551 static unsigned int
 552 mips_swap_reloc_out (bfd * abfd, void * src, void * dst)
 553 {
 554   static bfd_vma prev_addr = 0;
 555   struct internal_reloc *reloc_src = (struct internal_reloc *)src;
 556   struct external_reloc *reloc_dst = (struct external_reloc *)dst;
 557
 558   switch (reloc_src->r_type)
 559     {
 560     case MIPS_R_REFHI:
 561       prev_addr = reloc_src->r_vaddr;
 562       break;
 563     case MIPS_R_REFLO:
 564       if (reloc_src->r_vaddr == prev_addr)
 565         {
 566           /* FIXME: only slightly hackish.  If we see a REFLO pointing to
 567              the same address as a REFHI, we assume this is the matching
 568              PAIR reloc and output it accordingly.  The symndx is really
 569              the low 16 bits of the addend */
 570           H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
 571           H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
 572           H_PUT_16 (abfd, MIPS_R_PAIR, reloc_dst->r_type);
 573           return RELSZ;
 574         }
 575       break;
 576     }
 577
 578   H_PUT_32 (abfd, reloc_src->r_vaddr, reloc_dst->r_vaddr);
 579   H_PUT_32 (abfd, reloc_src->r_symndx, reloc_dst->r_symndx);
 580
 581   H_PUT_16 (abfd, reloc_src->r_type, reloc_dst->r_type);
 582   return RELSZ;
 583 }
 584
 585 #define coff_swap_reloc_in   mips_swap_reloc_in
 586 #define coff_swap_reloc_out  mips_swap_reloc_out
 587 #define NO_COFF_RELOCS
 588
 589 static bfd_boolean
 590 coff_pe_mips_relocate_section (bfd *output_bfd,
 591                                struct bfd_link_info *info,
 592                                bfd *input_bfd,
 593                                asection *input_section,
 594                                bfd_byte *contents,
 595                                struct internal_reloc *relocs,
 596                                struct internal_syment *syms,
 597                                asection **sections)
 598 {
 599   struct internal_reloc *rel;
 600   struct internal_reloc *rel_end;
 601   unsigned int i;
 602
 603   if (info->relocatable)
 604     {
 605       (*_bfd_error_handler)
 606         (_("%B: `ld -r' not supported with PE MIPS objects\n"), input_bfd);
 607       bfd_set_error (bfd_error_bad_value);
 608       return FALSE;
 609     }
 610
 611   BFD_ASSERT (input_bfd->xvec->byteorder
 612               == output_bfd->xvec->byteorder);
 613
 614   rel = relocs;
 615   rel_end = rel + input_section->reloc_count;
 616
 617   for (i = 0; rel < rel_end; rel++, i++)
 618     {
 619       long symndx;
 620       struct coff_link_hash_entry *h;
 621       struct internal_syment *sym;
 622       bfd_vma addend = 0;
 623       bfd_vma val, tmp, targ, src, low;
 624       reloc_howto_type *howto;
 625       unsigned char *mem = contents + rel->r_vaddr;
 626
 627       symndx = rel->r_symndx;
 628
 629       if (symndx == -1)
 630         {
 631           h = NULL;
 632           sym = NULL;
 633         }
 634       else
 635         {
 636           h = obj_coff_sym_hashes (input_bfd)[symndx];
 637           sym = syms + symndx;
 638         }
 639
 640       /* COFF treats common symbols in one of two ways.  Either the
 641          size of the symbol is included in the section contents, or it
 642          is not.  We assume that the size is not included, and force
 643          the rtype_to_howto function to adjust the addend as needed.  */
 644
 645       if (sym != NULL && sym->n_scnum != 0)
 646         addend = - sym->n_value;
 647       else
 648         addend = 0;
 649
 650       howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
 651                                        sym, &addend);
 652       if (howto == NULL)
 653         return FALSE;
 654
 655       /* If we are doing a relocatable link, then we can just ignore
 656          a PC relative reloc that is pcrel_offset.  It will already
 657          have the correct value.  If this is not a relocatable link,
 658          then we should ignore the symbol value.  */
 659       if (howto->pc_relative && howto->pcrel_offset)
 660         {
 661           if (info->relocatable)
 662             continue;
 663           if (sym != NULL && sym->n_scnum != 0)
 664             addend += sym->n_value;
 665         }
 666
 667       val = 0;
 668
 669       if (h == NULL)
 670         {
 671           asection *sec;
 672
 673           if (symndx == -1)
 674             {
 675               sec = bfd_abs_section_ptr;
 676               val = 0;
 677             }
 678           else
 679             {
 680               sec = sections[symndx];
 681               val = (sec->output_section->vma
 682                      + sec->output_offset
 683                      + sym->n_value);
 684               if (! obj_pe (input_bfd))
 685                 val -= sec->vma;
 686             }
 687         }
 688       else
 689         {
 690           if (h->root.type == bfd_link_hash_defined
 691               || h->root.type == bfd_link_hash_defweak)
 692             {
 693               asection *sec;
 694
 695               sec = h->root.u.def.section;
 696               val = (h->root.u.def.value
 697                      + sec->output_section->vma
 698                      + sec->output_offset);
 699               }
 700
 701           else if (! info->relocatable)
 702             {
 703               if (! ((*info->callbacks->undefined_symbol)
 704                      (info, h->root.root.string, input_bfd, input_section,
 705                       rel->r_vaddr - input_section->vma, TRUE)))
 706                 return FALSE;
 707             }
 708         }
 709
 710       src = rel->r_vaddr + input_section->output_section->vma
 711         + input_section->output_offset;
 712
 713       /* OK, at this point the following variables are set up:
 714            src = VMA of the memory we're fixing up
 715            mem = pointer to memory we're fixing up
 716            val = VMA of what we need to refer to.  */
 717
 718 #define UI(x) (*_bfd_error_handler) (_("%B: unimplemented %s\n"), \
 719                                      input_bfd, x); \
 720               bfd_set_error (bfd_error_bad_value);
 721
 722       switch (rel->r_type)
 723         {
 724         case MIPS_R_ABSOLUTE:
 725           /* Ignore these.  */
 726           break;
 727
 728         case MIPS_R_REFHALF:
 729           UI ("refhalf");
 730           break;
 731
 732         case MIPS_R_REFWORD:
 733           tmp = bfd_get_32 (input_bfd, mem);
 734           /* printf ("refword: src=%08x targ=%08x+%08x\n", src, tmp, val); */
 735           tmp += val;
 736           bfd_put_32 (input_bfd, tmp, mem);
 737           break;
 738
 739         case MIPS_R_JMPADDR:
 740           tmp = bfd_get_32 (input_bfd, mem);
 741           targ = val + (tmp & 0x03ffffff) * 4;
 742           if ((src & 0xf0000000) != (targ & 0xf0000000))
 743             {
 744               (*_bfd_error_handler) (_("%B: jump too far away\n"), input_bfd);
 745               bfd_set_error (bfd_error_bad_value);
 746               return FALSE;
 747             }
 748           tmp &= 0xfc000000;
 749           tmp |= (targ / 4) & 0x3ffffff;
 750           bfd_put_32 (input_bfd, tmp, mem);
 751           break;
 752
 753         case MIPS_R_REFHI:
 754           tmp = bfd_get_32 (input_bfd, mem);
 755           switch (rel[1].r_type)
 756             {
 757             case MIPS_R_PAIR:
 758               /* MS PE object */
 759               targ = val + rel[1].r_offset + ((tmp & 0xffff) << 16);
 760               break;
 761             case MIPS_R_REFLO:
 762               /* GNU COFF object */
 763               low = bfd_get_32 (input_bfd, contents + rel[1].r_vaddr);
 764               low &= 0xffff;
 765               if (low & 0x8000)
 766                 low -= 0x10000;
 767               targ = val + low + ((tmp & 0xffff) << 16);
 768               break;
 769             default:
 770               (*_bfd_error_handler) (_("%B: bad pair/reflo after refhi\n"),
 771                                      input_bfd);
 772               bfd_set_error (bfd_error_bad_value);
 773               return FALSE;
 774             }
 775           tmp &= 0xffff0000;
 776           tmp |= (targ >> 16) & 0xffff;
 777           bfd_put_32 (input_bfd, tmp, mem);
 778           break;
 779
 780         case MIPS_R_REFLO:
 781           tmp = bfd_get_32 (input_bfd, mem);
 782           targ = val + (tmp & 0xffff);
 783           /* printf ("refword: src=%08x targ=%08x\n", src, targ); */
 784           tmp &= 0xffff0000;
 785           tmp |= targ & 0xffff;
 786           bfd_put_32 (input_bfd, tmp, mem);
 787           break;
 788
 789         case MIPS_R_GPREL:
 790         case MIPS_R_LITERAL:
 791           UI ("gprel");
 792           break;
 793
 794         case MIPS_R_SECTION:
 795           UI ("section");
 796           break;
 797
 798         case MIPS_R_SECREL:
 799           UI ("secrel");
 800           break;
 801
 802         case MIPS_R_SECRELLO:
 803           UI ("secrello");
 804           break;
 805
 806         case MIPS_R_SECRELHI:
 807           UI ("secrelhi");
 808           break;
 809
 810         case MIPS_R_RVA:
 811           tmp = bfd_get_32 (input_bfd, mem);
 812           /* printf ("rva: src=%08x targ=%08x+%08x\n", src, tmp, val); */
 813           tmp += val
 814             - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase;
 815           bfd_put_32 (input_bfd, tmp, mem);
 816           break;
 817
 818         case MIPS_R_PAIR:
 819           /* ignore these */
 820           break;
 821         }
 822     }
 823
 824   return TRUE;
 825 }
 826
 827 #define coff_relocate_section coff_pe_mips_relocate_section
 828
 829 #ifdef TARGET_UNDERSCORE
 830
 831 /* If mips gcc uses underscores for symbol names, then it does not use
 832    a leading dot for local labels, so if TARGET_UNDERSCORE is defined
 833    we treat all symbols starting with L as local.  */
 834
 835 static bfd_boolean
 836 coff_mips_is_local_label_name (bfd *abfd, const char *name)
 837 {
 838   if (name[0] == 'L')
 839     return TRUE;
 840
 841   return _bfd_coff_is_local_label_name (abfd, name);
 842 }
 843
 844 #define coff_bfd_is_local_label_name coff_mips_is_local_label_name
 845
 846 #endif /* TARGET_UNDERSCORE */
 847
 848 #define COFF_NO_HACK_SCNHDR_SIZE
 849
 850 #ifndef bfd_pe_print_pdata
 851 #define bfd_pe_print_pdata      NULL
 852 #endif
 853
 854 #include "coffcode.h"
 855
 856 const bfd_target
 857 #ifdef TARGET_SYM
 858   TARGET_SYM =
 859 #else
 860   mips_pe_le_vec =
 861 #endif
 862 {
 863 #ifdef TARGET_NAME
 864   TARGET_NAME,
 865 #else
 866   "pe-mips",                    /* Name.  */
 867 #endif
 868   bfd_target_coff_flavour,
 869   BFD_ENDIAN_LITTLE,            /* Data byte order is little.  */
 870   BFD_ENDIAN_LITTLE,            /* Header byte order is little.  */
 871
 872   (HAS_RELOC | EXEC_P |         /* Object flags.  */
 873    HAS_LINENO | HAS_DEBUG |
 874    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 875
 876 #ifndef COFF_WITH_PE
 877   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags.  */
 878    | SEC_CODE | SEC_DATA),
 879 #else
 880   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* Section flags.  */
 881    | SEC_CODE | SEC_DATA
 882    | SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
 883 #endif
 884
 885 #ifdef TARGET_UNDERSCORE
 886   TARGET_UNDERSCORE,            /* Leading underscore.  */
 887 #else
 888   0,                            /* leading underscore */
 889 #endif
 890   '/',                          /* AR_pad_char.  */
 891   15,                           /* AR_max_namelen.  */
 892   0,                            /* match priority.  */
 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 };