bfd/coff-ia64.c

   1 /* BFD back-end for HP/Intel IA-64 COFF files.
   2    Copyright 1999, 2000, 2001, 2002, 2007 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 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 #include "sysdep.h"
  23 #include "bfd.h"
  24 #include "libbfd.h"
  25 #include "coff/ia64.h"
  26 #include "coff/internal.h"
  27 #include "coff/pe.h"
  28 #include "libcoff.h"
  29
  30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
  31 /* The page size is a guess based on ELF.  */
  32
  33 #define COFF_PAGE_SIZE 0x1000
  34
  35 static reloc_howto_type howto_table[] =
  36 {
  37   EMPTY_HOWTO (0),
  38 };
  39
  40 #define BADMAG(x) IA64BADMAG(x)
  41 #define IA64 1                  /* Customize coffcode.h */
  42
  43 #ifdef COFF_WITH_pep
  44 # undef AOUTSZ
  45 # define AOUTSZ         PEPAOUTSZ
  46 # define PEAOUTHDR      PEPAOUTHDR
  47 #endif
  48
  49 #define RTYPE2HOWTO(cache_ptr, dst) \
  50             (cache_ptr)->howto = howto_table + (dst)->r_type;
  51
  52 #ifdef COFF_WITH_PE
  53 /* Return TRUE if this relocation should
  54    appear in the output .reloc section.  */
  55
  56 static bfd_boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *));
  57
  58 static bfd_boolean
  59 in_reloc_p(abfd, howto)
  60      bfd * abfd ATTRIBUTE_UNUSED;
  61      reloc_howto_type *howto ATTRIBUTE_UNUSED;
  62 {
  63   return FALSE;                 /* We don't do relocs for now...  */
  64 }
  65 #endif
  66
  67 #include "coffcode.h"
  68
  69 static const bfd_target *ia64coff_object_p PARAMS ((bfd *));
  70
  71 static const bfd_target *
  72 ia64coff_object_p (abfd)
  73      bfd *abfd;
  74 {
  75 #ifdef COFF_IMAGE_WITH_PE
  76   {
  77     struct external_PEI_DOS_hdr dos_hdr;
  78     struct external_PEI_IMAGE_hdr image_hdr;
  79     file_ptr offset;
  80
  81     if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
  82         || (bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd)
  83             != sizeof (dos_hdr)))
  84       {
  85         if (bfd_get_error () != bfd_error_system_call)
  86           bfd_set_error (bfd_error_wrong_format);
  87         return NULL;
  88       }
  89
  90     /* There are really two magic numbers involved; the magic number
  91        that says this is a NT executable (PEI) and the magic number
  92        that determines the architecture.  The former is DOSMAGIC,
  93        stored in the e_magic field.  The latter is stored in the
  94        f_magic field.  If the NT magic number isn't valid, the
  95        architecture magic number could be mimicked by some other
  96        field (specifically, the number of relocs in section 3).  Since
  97        this routine can only be called correctly for a PEI file, check
  98        the e_magic number here, and, if it doesn't match, clobber the
  99        f_magic number so that we don't get a false match.  */
 100     if (H_GET_16 (abfd, dos_hdr.e_magic) != DOSMAGIC)
 101       {
 102         bfd_set_error (bfd_error_wrong_format);
 103         return NULL;
 104       }
 105
 106     offset = H_GET_32 (abfd, dos_hdr.e_lfanew);
 107     if (bfd_seek (abfd, offset, SEEK_SET) != 0
 108         || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd)
 109             != sizeof (image_hdr)))
 110       {
 111         if (bfd_get_error () != bfd_error_system_call)
 112           bfd_set_error (bfd_error_wrong_format);
 113         return NULL;
 114       }
 115
 116     if (H_GET_32 (abfd, image_hdr.nt_signature)
 117         != 0x4550)
 118       {
 119         bfd_set_error (bfd_error_wrong_format);
 120         return NULL;
 121       }
 122
 123     /* Here is the hack.  coff_object_p wants to read filhsz bytes to
 124        pick up the COFF header for PE, see "struct external_PEI_filehdr"
 125        in include/coff/pe.h.  We adjust so that that will work. */
 126     if (bfd_seek (abfd, offset - sizeof (dos_hdr), SEEK_SET) != 0)
 127       {
 128         if (bfd_get_error () != bfd_error_system_call)
 129           bfd_set_error (bfd_error_wrong_format);
 130         return NULL;
 131       }
 132   }
 133 #endif
 134
 135   return coff_object_p (abfd);
 136 }
 137
 138 const bfd_target
 139 #ifdef TARGET_SYM
 140   TARGET_SYM =
 141 #else
 142   ia64coff_vec =
 143 #endif
 144 {
 145 #ifdef TARGET_NAME
 146   TARGET_NAME,
 147 #else
 148   "coff-ia64",                  /* name */
 149 #endif
 150   bfd_target_coff_flavour,
 151   BFD_ENDIAN_LITTLE,            /* data byte order is little */
 152   BFD_ENDIAN_LITTLE,            /* header byte order is little */
 153
 154   (HAS_RELOC | EXEC_P |         /* object flags */
 155    HAS_LINENO | HAS_DEBUG |
 156    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 157
 158 #ifndef COFF_WITH_PE
 159   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
 160    | SEC_CODE | SEC_DATA),
 161 #else
 162   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
 163    | SEC_CODE | SEC_DATA
 164    | SEC_LINK_ONCE | SEC_LINK_DUPLICATES),
 165 #endif
 166
 167 #ifdef TARGET_UNDERSCORE
 168   TARGET_UNDERSCORE,            /* leading underscore */
 169 #else
 170   0,                            /* leading underscore */
 171 #endif
 172   '/',                          /* ar_pad_char */
 173   15,                           /* ar_max_namelen */
 174
 175   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 176      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 177      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
 178   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 179      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 180      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 181
 182 /* Note that we allow an object file to be treated as a core file as well.  */
 183     {_bfd_dummy_target, ia64coff_object_p, /* bfd_check_format */
 184        bfd_generic_archive_p, ia64coff_object_p},
 185     {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
 186        bfd_false},
 187     {bfd_false, coff_write_object_contents, /* bfd_write_contents */
 188        _bfd_write_archive_contents, bfd_false},
 189
 190      BFD_JUMP_TABLE_GENERIC (coff),
 191      BFD_JUMP_TABLE_COPY (coff),
 192      BFD_JUMP_TABLE_CORE (_bfd_nocore),
 193      BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 194      BFD_JUMP_TABLE_SYMBOLS (coff),
 195      BFD_JUMP_TABLE_RELOCS (coff),
 196      BFD_JUMP_TABLE_WRITE (coff),
 197      BFD_JUMP_TABLE_LINK (coff),
 198      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 199
 200   NULL,
 201
 202   COFF_SWAP_TABLE
 203 };