gnu/dist/gdb6/bfd/coff-ia64.c

   1 /* BFD back-end for HP/Intel IA-64 COFF files.
   2    Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by David Mosberger <davidm@hpl.hp.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 2 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, MA 02110-1301, USA.  */
  20
  21 #include "bfd.h"
  22 #include "sysdep.h"
  23 #include "libbfd.h"
  24 #include "coff/ia64.h"
  25 #include "coff/internal.h"
  26 #include "coff/pe.h"
  27 #include "libcoff.h"
  28
  29 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
  30 /* The page size is a guess based on ELF.  */
  31
  32 #define COFF_PAGE_SIZE 0x1000
  33
  34 static reloc_howto_type howto_table[] =
  35 {
  36   EMPTY_HOWTO (0),
  37 };
  38
  39 #define BADMAG(x) IA64BADMAG(x)
  40 #define IA64 1                  /* Customize coffcode.h */
  41
  42 #ifdef COFF_WITH_pep
  43 # undef AOUTSZ
  44 # define AOUTSZ         PEPAOUTSZ
  45 # define PEAOUTHDR      PEPAOUTHDR
  46 #endif
  47
  48 #define RTYPE2HOWTO(cache_ptr, dst) \
  49             (cache_ptr)->howto = howto_table + (dst)->r_type;
  50
  51 #ifdef COFF_WITH_PE
  52 /* Return TRUE if this relocation should
  53    appear in the output .reloc section.  */
  54
  55 static bfd_boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *));
  56
  57 static bfd_boolean
  58 in_reloc_p(abfd, howto)
  59      bfd * abfd ATTRIBUTE_UNUSED;
  60      reloc_howto_type *howto ATTRIBUTE_UNUSED;
  61 {
  62   return FALSE;                 /* We don't do relocs for now...  */
  63 }
  64 #endif
  65
  66 #include "coffcode.h"
  67
  68 static const bfd_target *ia64coff_object_p PARAMS ((bfd *));
  69
  70 static const bfd_target *
  71 ia64coff_object_p (abfd)
  72      bfd *abfd;
  73 {
  74 #ifdef COFF_IMAGE_WITH_PE
  75   {
  76     struct external_PEI_DOS_hdr dos_hdr;
  77     struct external_PEI_IMAGE_hdr image_hdr;
  78     file_ptr offset;
  79
  80     if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
  81         || (bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd)
  82             != sizeof (dos_hdr)))
  83       {
  84         if (bfd_get_error () != bfd_error_system_call)
  85           bfd_set_error (bfd_error_wrong_format);
  86         return NULL;
  87       }
  88
  89     /* There are really two magic numbers involved; the magic number
  90        that says this is a NT executable (PEI) and the magic number
  91        that determines the architecture.  The former is DOSMAGIC,
  92        stored in the e_magic field.  The latter is stored in the
  93        f_magic field.  If the NT magic number isn't valid, the
  94        architecture magic number could be mimicked by some other
  95        field (specifically, the number of relocs in section 3).  Since
  96        this routine can only be called correctly for a PEI file, check
  97        the e_magic number here, and, if it doesn't match, clobber the
  98        f_magic number so that we don't get a false match.  */
  99     if (H_GET_16 (abfd, dos_hdr.e_magic) != DOSMAGIC)
 100       {
 101         bfd_set_error (bfd_error_wrong_format);
 102         return NULL;
 103       }
 104
 105     offset = H_GET_32 (abfd, dos_hdr.e_lfanew);
 106     if (bfd_seek (abfd, offset, SEEK_SET) != 0
 107         || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd)
 108             != sizeof (image_hdr)))
 109       {
 110         if (bfd_get_error () != bfd_error_system_call)
 111           bfd_set_error (bfd_error_wrong_format);
 112         return NULL;
 113       }
 114
 115     if (H_GET_32 (abfd, image_hdr.nt_signature)
 116         != 0x4550)
 117       {
 118         bfd_set_error (bfd_error_wrong_format);
 119         return NULL;
 120       }
 121
 122     /* Here is the hack.  coff_object_p wants to read filhsz bytes to
 123        pick up the COFF header for PE, see "struct external_PEI_filehdr"
 124        in include/coff/pe.h.  We adjust so that that will work. */
 125     if (bfd_seek (abfd, offset - sizeof (dos_hdr), SEEK_SET) != 0)
 126       {
 127         if (bfd_get_error () != bfd_error_system_call)
 128           bfd_set_error (bfd_error_wrong_format);
 129         return NULL;
 130       }
 131   }
 132 #endif
 133
 134   return coff_object_p (abfd);
 135 }
 136
 137 const bfd_target
 138 #ifdef TARGET_SYM
 139   TARGET_SYM =
 140 #else
 141   ia64coff_vec =
 142 #endif
 143 {
 144 #ifdef TARGET_NAME
 145   TARGET_NAME,
 146 #else
 147   "coff-ia64",                  /* name */
 148 #endif
 149   bfd_target_coff_flavour,
 150   BFD_ENDIAN_LITTLE,            /* data byte order is little */
 151   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 152
 153   (HAS_RELOC | EXEC_P |         /* object flags */
 154    HAS_LINENO | HAS_DEBUG |
 155    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 156
 157 #ifndef COFF_WITH_PE
 158   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
 159    | SEC_CODE | SEC_DATA),
 160 #else
 161   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
 162    | SEC_CODE | SEC_DATA
 163    | SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
 164 #endif
 165
 166 #ifdef TARGET_UNDERSCORE
 167   TARGET_UNDERSCORE,            /* leading underscore */
 168 #else
 169   0,                            /* leading underscore */
 170 #endif
 171   '/',                          /* ar_pad_char */
 172   15,                           /* ar_max_namelen */
 173
 174   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 175      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 176      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
 177   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 178      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 179      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 180
 181 /* Note that we allow an object file to be treated as a core file as well.  */
 182     {_bfd_dummy_target, ia64coff_object_p, /* bfd_check_format */
 183        bfd_generic_archive_p, ia64coff_object_p},
 184     {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 185        bfd_false},
 186     {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 187        _bfd_write_archive_contents, bfd_false},
 188
 189      BFD_JUMP_TABLE_GENERIC (coff),
 190      BFD_JUMP_TABLE_COPY (coff),
 191      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 192      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 193      BFD_JUMP_TABLE_SYMBOLS (coff),
 194      BFD_JUMP_TABLE_RELOCS (coff),
 195      BFD_JUMP_TABLE_WRITE (coff),
 196      BFD_JUMP_TABLE_LINK (coff),
 197      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 198
 199   NULL,
 200
 201   COFF_SWAP_TABLE
 202 };