bfd/coff-ia64.c

   1 /* BFD back-end for HP/Intel IA-64 COFF files.
   2    Copyright 1999, 2000, 2001 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 boolean
  56 in_reloc_p(abfd, howto)
  57      bfd * abfd ATTRIBUTE_UNUSED;
  58      reloc_howto_type *howto ATTRIBUTE_UNUSED;
  59 {
  60   return 0;                     /* We don't do relocs for now...  */
  61 }
  62 #endif
  63
  64 #include "coffcode.h"
  65
  66 static const bfd_target *
  67 ia64coff_object_p (abfd)
  68      bfd *abfd;
  69 {
  70 #ifdef COFF_IMAGE_WITH_PE
  71   {
  72     struct external_PEI_DOS_hdr dos_hdr;
  73     struct external_PEI_IMAGE_hdr image_hdr;
  74     file_ptr offset;
  75
  76     if (bfd_seek (abfd, 0x00, SEEK_SET) != 0
  77         || bfd_read (&dos_hdr, 1, sizeof (dos_hdr), abfd)
  78            != sizeof (dos_hdr))
  79       {
  80         if (bfd_get_error () != bfd_error_system_call)
  81           bfd_set_error (bfd_error_wrong_format);
  82         return NULL;
  83       }
  84
  85     /* There are really two magic numbers involved; the magic number
  86        that says this is a NT executable (PEI) and the magic number
  87        that determines the architecture.  The former is DOSMAGIC,
  88        stored in the e_magic field.  The latter is stored in the
  89        f_magic field.  If the NT magic number isn't valid, the
  90        architecture magic number could be mimicked by some other
  91        field (specifically, the number of relocs in section 3).  Since
  92        this routine can only be called correctly for a PEI file, check
  93        the e_magic number here, and, if it doesn't match, clobber the
  94        f_magic number so that we don't get a false match.  */
  95     if (bfd_h_get_16 (abfd, (bfd_byte *) dos_hdr.e_magic) != DOSMAGIC)
  96       {
  97         bfd_set_error (bfd_error_wrong_format);
  98         return NULL;
  99       }
 100
 101     offset = bfd_h_get_32 (abfd, (bfd_byte *) dos_hdr.e_lfanew);
 102     if (bfd_seek (abfd, (file_ptr) offset, SEEK_SET) != 0
 103         || bfd_read (&image_hdr, 1, sizeof (image_hdr), abfd)
 104            != sizeof (image_hdr))
 105       {
 106         if (bfd_get_error () != bfd_error_system_call)
 107           bfd_set_error (bfd_error_wrong_format);
 108         return NULL;
 109       }
 110
 111     if (bfd_h_get_32 (abfd, (bfd_byte *) image_hdr.nt_signature)
 112         != 0x4550)
 113       {
 114         bfd_set_error (bfd_error_wrong_format);
 115         return NULL;
 116       }
 117
 118     /* Here is the hack.  coff_object_p wants to read filhsz bytes to
 119        pick up the COFF header for PE, see "struct external_PEI_filehdr"
 120        in include/coff/pe.h.  We adjust so that that will work. */
 121     if (bfd_seek (abfd,
 122                   (file_ptr) (offset - sizeof (dos_hdr)),
 123                   SEEK_SET)
 124         != 0)
 125       {
 126         if (bfd_get_error () != bfd_error_system_call)
 127           bfd_set_error (bfd_error_wrong_format);
 128         return NULL;
 129       }
 130   }
 131 #endif
 132
 133   return coff_object_p (abfd);
 134 }
 135
 136 const bfd_target
 137 #ifdef TARGET_SYM
 138   TARGET_SYM =
 139 #else
 140   ia64coff_vec =
 141 #endif
 142 {
 143 #ifdef TARGET_NAME
 144   TARGET_NAME,
 145 #else
 146   "coff-ia64",                  /* name */
 147 #endif
 148   bfd_target_coff_flavour,
 149   BFD_ENDIAN_LITTLE,            /* data byte order is little */
 150   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 151
 152   (HAS_RELOC | EXEC_P |         /* object flags */
 153    HAS_LINENO | HAS_DEBUG |
 154    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 155
 156 #ifndef COFF_WITH_PE
 157   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
 158    | SEC_CODE | SEC_DATA),
 159 #else
 160   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
 161    | SEC_CODE | SEC_DATA
 162    | SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
 163 #endif
 164
 165 #ifdef TARGET_UNDERSCORE
 166   TARGET_UNDERSCORE,            /* leading underscore */
 167 #else
 168   0,                            /* leading underscore */
 169 #endif
 170   '/',                          /* ar_pad_char */
 171   15,                           /* ar_max_namelen */
 172
 173   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 174      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 175      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
 176   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 177      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 178      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 179
 180 /* Note that we allow an object file to be treated as a core file as well.  */
 181     {_bfd_dummy_target, ia64coff_object_p, /* bfd_check_format */
 182        bfd_generic_archive_p, ia64coff_object_p},
 183     {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 184        bfd_false},
 185     {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 186        _bfd_write_archive_contents, bfd_false},
 187
 188      BFD_JUMP_TABLE_GENERIC (coff),
 189      BFD_JUMP_TABLE_COPY (coff),
 190      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 191      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 192      BFD_JUMP_TABLE_SYMBOLS (coff),
 193      BFD_JUMP_TABLE_RELOCS (coff),
 194      BFD_JUMP_TABLE_WRITE (coff),
 195      BFD_JUMP_TABLE_LINK (coff),
 196      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 197
 198   NULL,
 199
 200   COFF_SWAP_TABLE
 201 };