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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [i386os9k.c] - Blame information for rev 225

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1 24 jeremybenn
/* BFD back-end for os9000 i386 binaries.
2
   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001, 2002,
3 225 jeremybenn
   2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
4 24 jeremybenn
   Written by Cygnus Support.
5
 
6
   This file is part of BFD, the Binary File Descriptor library.
7
 
8
   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
20
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
22
 
23
#include "sysdep.h"
24
#include "bfd.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "libaout.h"            /* BFD a.out internal data structures */
28
#include "os9k.h"
29
 
30
/* Swaps the information in an executable header taken from a raw byte
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   stream memory image, into the internal exec_header structure.  */
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static bfd_boolean
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os9k_swap_exec_header_in (bfd *abfd,
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                          mh_com *raw_bytes,
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                          struct internal_exec *execp)
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{
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  mh_com *bytes = (mh_com *) raw_bytes;
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  unsigned int dload, dmemsize, dmemstart;
39
 
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  /* Now fill in fields in the execp, from the bytes in the raw data.  */
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  execp->a_info = H_GET_16 (abfd, bytes->m_sync);
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  execp->a_syms = 0;
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  execp->a_entry = H_GET_32 (abfd, bytes->m_exec);
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  execp->a_talign = 2;
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  execp->a_dalign = 2;
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  execp->a_balign = 2;
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48
  dload = H_GET_32 (abfd, bytes->m_idata);
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  execp->a_data = dload + 8;
50
 
51
  if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0
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      || (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd)
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          != sizeof (dmemstart))
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      || (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd)
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          != sizeof (dmemsize)))
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    return FALSE;
57
 
58
  execp->a_tload = 0;
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  execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart);
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  execp->a_text = dload - execp->a_tload;
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  execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize);
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  execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data;
63
 
64
  execp->a_trsize = 0;
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  execp->a_drsize = 0;
66
 
67
  return TRUE;
68
}
69
 
70
 
71
/* Finish up the opening of a b.out file for reading.  Fill in all the
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   fields that are not handled by common code.  */
73
 
74
static const bfd_target *
75
os9k_callback (bfd *abfd)
76
{
77
  struct internal_exec *execp = exec_hdr (abfd);
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  unsigned long bss_start;
79
 
80
  /* Architecture and machine type.  */
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  bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
82
 
83
  /* The positions of the string table and symbol table.  */
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  obj_str_filepos (abfd) = 0;
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  obj_sym_filepos (abfd) = 0;
86
 
87
  /* The alignments of the sections.  */
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  obj_textsec (abfd)->alignment_power = execp->a_talign;
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  obj_datasec (abfd)->alignment_power = execp->a_dalign;
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  obj_bsssec (abfd)->alignment_power = execp->a_balign;
91
 
92
  /* The starting addresses of the sections.  */
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  obj_textsec (abfd)->vma = execp->a_tload;
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  obj_datasec (abfd)->vma = execp->a_dload;
95
 
96
  /* And reload the sizes, since the aout module zaps them.  */
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  obj_textsec (abfd)->size = execp->a_text;
98
 
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  bss_start = execp->a_dload + execp->a_data;   /* BSS = end of data section.  */
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  obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
101
 
102
  /* The file positions of the sections.  */
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  obj_textsec (abfd)->filepos = execp->a_entry;
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  obj_datasec (abfd)->filepos = execp->a_dload;
105
 
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  /* The file positions of the relocation info ***
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  obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
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  obj_datasec (abfd)->rel_filepos =  N_DROFF(*execp);  */
109
 
110
  adata (abfd).page_size = 1;   /* Not applicable.  */
111
  adata (abfd).segment_size = 1;/* Not applicable.  */
112
  adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE;
113
 
114
  return abfd->xvec;
115
}
116
 
117
static const bfd_target *
118
os9k_object_p (bfd *abfd)
119
{
120
  struct internal_exec anexec;
121
  mh_com exec_bytes;
122
 
123
  if (bfd_bread ((PTR) &exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd)
124
      != MHCOM_BYTES_SIZE)
125
    {
126
      if (bfd_get_error () != bfd_error_system_call)
127
        bfd_set_error (bfd_error_wrong_format);
128
      return 0;
129
    }
130
 
131
  anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync);
132
  if (N_BADMAG (anexec))
133
    {
134
      bfd_set_error (bfd_error_wrong_format);
135
      return 0;
136
    }
137
 
138
  if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec))
139
    {
140
      if (bfd_get_error () != bfd_error_system_call)
141
        bfd_set_error (bfd_error_wrong_format);
142
      return NULL;
143
    }
144
  return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
145
}
146
 
147
static int
148
os9k_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
149
                     struct bfd_link_info *info ATTRIBUTE_UNUSED)
150
{
151
  return sizeof (struct internal_exec);
152
}
153
 
154
 
155
 
156
#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
157
 
158
#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
159
 
160
#define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
161
#define aout_32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
162
 
163
#define aout_32_get_section_contents_in_window \
164
  _bfd_generic_get_section_contents_in_window
165
 
166
#define os9k_bfd_get_relocated_section_contents \
167
  bfd_generic_get_relocated_section_contents
168
#define os9k_bfd_relax_section bfd_generic_relax_section
169
#define os9k_bfd_gc_sections bfd_generic_gc_sections
170
#define os9k_bfd_merge_sections bfd_generic_merge_sections
171
#define os9k_bfd_is_group_section bfd_generic_is_group_section
172
#define os9k_bfd_discard_group bfd_generic_discard_group
173
#define os9k_section_already_linked \
174
  _bfd_generic_section_already_linked
175 225 jeremybenn
#define os9k_bfd_define_common_symbol bfd_generic_define_common_symbol
176 24 jeremybenn
#define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
177
#define os9k_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
178
#define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols
179
#define os9k_bfd_link_just_syms _bfd_generic_link_just_syms
180
#define os9k_bfd_final_link _bfd_generic_final_link
181
#define os9k_bfd_link_split_section  _bfd_generic_link_split_section
182
 
183
const bfd_target i386os9k_vec =
184
  {
185
    "i386os9k",                 /* name */
186
    bfd_target_os9k_flavour,
187
    BFD_ENDIAN_LITTLE,          /* data byte order is little */
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    BFD_ENDIAN_LITTLE,          /* hdr byte order is little */
189
    (HAS_RELOC | EXEC_P | WP_TEXT),     /* object flags */
190
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD),  /* section flags */
191
    0,                           /* symbol leading char */
192
    ' ',                                /* ar_pad_char */
193
    16,                         /* ar_max_namelen */
194
 
195
    bfd_getl64, bfd_getl_signed_64, bfd_putl64,
196
    bfd_getl32, bfd_getl_signed_32, bfd_putl32,
197
    bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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    bfd_getl64, bfd_getl_signed_64, bfd_putl64,
199
    bfd_getl32, bfd_getl_signed_32, bfd_putl32,
200
    bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
201
    {_bfd_dummy_target, os9k_object_p,  /* bfd_check_format */
202
     bfd_generic_archive_p, _bfd_dummy_target},
203
    {bfd_false, bfd_false,      /* bfd_set_format */
204
     _bfd_generic_mkarchive, bfd_false},
205
    {bfd_false, bfd_false,      /* bfd_write_contents */
206
     _bfd_write_archive_contents, bfd_false},
207
 
208
    BFD_JUMP_TABLE_GENERIC (aout_32),
209
    BFD_JUMP_TABLE_COPY (_bfd_generic),
210
    BFD_JUMP_TABLE_CORE (_bfd_nocore),
211
    BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
212
    BFD_JUMP_TABLE_SYMBOLS (aout_32),
213
    BFD_JUMP_TABLE_RELOCS (aout_32),
214
    BFD_JUMP_TABLE_WRITE (aout_32),
215
    BFD_JUMP_TABLE_LINK (os9k),
216
    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
217
 
218
    NULL,
219
 
220
    (PTR) 0,
221
  };

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