bfd/coff-ia64.c

   1 /* BFD back-end for HP/Intel IA-64 COFF files.
   2    Copyright (C) 1999-2017 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
  32 /* Windows ia64 uses 8K page size.  */
  33 #define COFF_PAGE_SIZE 0x2000
  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;
  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
  57 in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED,
  58             reloc_howto_type *howto ATTRIBUTE_UNUSED)
  59 {
  60   return FALSE;                 /* We don't do relocs for now...  */
  61 }
  62 #endif
  63
  64 #ifndef bfd_pe_print_pdata
  65 #define bfd_pe_print_pdata      NULL
  66 #endif
  67
  68 #include "coffcode.h"
  69
  70 static const bfd_target *
  71 ia64coff_object_p (bfd *abfd)
  72 {
  73 #ifdef COFF_IMAGE_WITH_PE
  74   {
  75     struct external_PEI_DOS_hdr dos_hdr;
  76     struct external_PEI_IMAGE_hdr image_hdr;
  77     file_ptr offset;
  78
  79     if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
  80         || (bfd_bread (&dos_hdr, (bfd_size_type) sizeof (dos_hdr), abfd)
  81             != sizeof (dos_hdr)))
  82       {
  83         if (bfd_get_error () != bfd_error_system_call)
  84           bfd_set_error (bfd_error_wrong_format);
  85         return NULL;
  86       }
  87
  88     /* There are really two magic numbers involved; the magic number
  89        that says this is a NT executable (PEI) and the magic number
  90        that determines the architecture.  The former is DOSMAGIC,
  91        stored in the e_magic field.  The latter is stored in the
  92        f_magic field.  If the NT magic number isn't valid, the
  93        architecture magic number could be mimicked by some other
  94        field (specifically, the number of relocs in section 3).  Since
  95        this routine can only be called correctly for a PEI file, check
  96        the e_magic number here, and, if it doesn't match, clobber the
  97        f_magic number so that we don't get a false match.  */
  98     if (H_GET_16 (abfd, dos_hdr.e_magic) != DOSMAGIC)
  99       {
 100         bfd_set_error (bfd_error_wrong_format);
 101         return NULL;
 102       }
 103
 104     offset = H_GET_32 (abfd, dos_hdr.e_lfanew);
 105     if (bfd_seek (abfd, offset, SEEK_SET) != 0
 106         || (bfd_bread (&image_hdr, (bfd_size_type) sizeof (image_hdr), abfd)
 107             != sizeof (image_hdr)))
 108       {
 109         if (bfd_get_error () != bfd_error_system_call)
 110           bfd_set_error (bfd_error_wrong_format);
 111         return NULL;
 112       }
 113
 114     if (H_GET_32 (abfd, image_hdr.nt_signature)
 115         != 0x4550)
 116       {
 117         bfd_set_error (bfd_error_wrong_format);
 118         return NULL;
 119       }
 120
 121     /* Here is the hack.  coff_object_p wants to read filhsz bytes to
 122        pick up the COFF header for PE, see "struct external_PEI_filehdr"
 123        in include/coff/pe.h.  We adjust so that that will work. */
 124     if (bfd_seek (abfd, offset - sizeof (dos_hdr), SEEK_SET) != 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   0,                            /* match priority.  */
 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 };