OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [binutils-2.18.50/] [bfd/] [i386msdos.c] - Blame information for rev 853

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 38 julius
/* BFD back-end for MS-DOS executables.
2
   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002,
3
   2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4
   Written by Bryan Ford of the University of Utah.
5
 
6
   Contributed by the Center for Software Science at the
7
   University of Utah (pa-gdb-bugs@cs.utah.edu).
8
 
9
   This file is part of BFD, the Binary File Descriptor library.
10
 
11
   This program is free software; you can redistribute it and/or modify
12
   it under the terms of the GNU General Public License as published by
13
   the Free Software Foundation; either version 3 of the License, or
14
   (at your option) any later version.
15
 
16
   This program is distributed in the hope that it will be useful,
17
   but WITHOUT ANY WARRANTY; without even the implied warranty of
18
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19
   GNU General Public License for more details.
20
 
21
   You should have received a copy of the GNU General Public License
22
   along with this program; if not, write to the Free Software
23
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
24
   MA 02110-1301, USA.  */
25
 
26
 
27
#include "sysdep.h"
28
#include "bfd.h"
29
#include "libbfd.h"
30
#include "libaout.h"
31
 
32
#define EXE_MAGIC       0x5a4d
33
#define EXE_LOAD_HIGH   0x0000
34
#define EXE_LOAD_LOW    0xffff
35
#define EXE_PAGE_SIZE   512
36
 
37
static int
38
msdos_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
39
                      struct bfd_link_info *info ATTRIBUTE_UNUSED)
40
{
41
  return 0;
42
}
43
 
44
static bfd_boolean
45
msdos_write_object_contents (bfd *abfd)
46
{
47
  static char hdr[EXE_PAGE_SIZE];
48
  file_ptr outfile_size = sizeof(hdr);
49
  bfd_vma high_vma = 0;
50
  asection *sec;
51
 
52
  /* Find the total size of the program on disk and in memory.  */
53
  for (sec = abfd->sections; sec != (asection *) NULL; sec = sec->next)
54
    {
55
      if (sec->size == 0)
56
        continue;
57
      if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
58
        {
59
          bfd_vma sec_vma = bfd_get_section_vma (abfd, sec) + sec->size;
60
          if (sec_vma > high_vma)
61
            high_vma = sec_vma;
62
        }
63
      if (bfd_get_section_flags (abfd, sec) & SEC_LOAD)
64
        {
65
          file_ptr sec_end = (sizeof (hdr)
66
                              + bfd_get_section_vma (abfd, sec)
67
                              + sec->size);
68
          if (sec_end > outfile_size)
69
            outfile_size = sec_end;
70
        }
71
    }
72
 
73
  /* Make sure the program isn't too big.  */
74
  if (high_vma > (bfd_vma)0xffff)
75
    {
76
      bfd_set_error(bfd_error_file_too_big);
77
      return FALSE;
78
    }
79
 
80
  /* Constants.  */
81
  H_PUT_16 (abfd, EXE_MAGIC, &hdr[0]);
82
  H_PUT_16 (abfd, EXE_PAGE_SIZE / 16, &hdr[8]);
83
  H_PUT_16 (abfd, EXE_LOAD_LOW, &hdr[12]);
84
  H_PUT_16 (abfd, 0x3e, &hdr[24]);
85
  H_PUT_16 (abfd, 0x0001, &hdr[28]); /* XXX??? */
86
  H_PUT_16 (abfd, 0x30fb, &hdr[30]); /* XXX??? */
87
  H_PUT_16 (abfd, 0x726a, &hdr[32]); /* XXX??? */
88
 
89
  /* Bytes in last page (0 = full page).  */
90
  H_PUT_16 (abfd, outfile_size & (EXE_PAGE_SIZE - 1), &hdr[2]);
91
 
92
  /* Number of pages.  */
93
  H_PUT_16 (abfd, (outfile_size + EXE_PAGE_SIZE - 1) / EXE_PAGE_SIZE, &hdr[4]);
94
 
95
  /* Set the initial stack pointer to the end of the bss.
96
     The program's crt0 code must relocate it to a real stack.  */
97
  H_PUT_16 (abfd, high_vma, &hdr[16]);
98
 
99
  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
100
      || bfd_bwrite (hdr, (bfd_size_type) sizeof(hdr), abfd) != sizeof(hdr))
101
    return FALSE;
102
 
103
  return TRUE;
104
}
105
 
106
static bfd_boolean
107
msdos_set_section_contents (bfd *abfd,
108
                            sec_ptr section,
109
                            const void *location,
110
                            file_ptr offset,
111
                            bfd_size_type count)
112
{
113
 
114
  if (count == 0)
115
    return TRUE;
116
 
117
  section->filepos = EXE_PAGE_SIZE + bfd_get_section_vma (abfd, section);
118
 
119
  if (bfd_get_section_flags (abfd, section) & SEC_LOAD)
120
    {
121
      if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
122
          || bfd_bwrite (location, count, abfd) != count)
123
        return FALSE;
124
    }
125
 
126
  return TRUE;
127
}
128
 
129
 
130
 
131
#define msdos_mkobject aout_32_mkobject
132
#define msdos_make_empty_symbol aout_32_make_empty_symbol
133
#define msdos_bfd_reloc_type_lookup aout_32_reloc_type_lookup
134
#define msdos_bfd_reloc_name_lookup aout_32_reloc_name_lookup
135
 
136
#define msdos_close_and_cleanup _bfd_generic_close_and_cleanup
137
#define msdos_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
138
#define msdos_new_section_hook _bfd_generic_new_section_hook
139
#define msdos_get_section_contents _bfd_generic_get_section_contents
140
#define msdos_get_section_contents_in_window \
141
  _bfd_generic_get_section_contents_in_window
142
#define msdos_bfd_get_relocated_section_contents \
143
  bfd_generic_get_relocated_section_contents
144
#define msdos_bfd_relax_section bfd_generic_relax_section
145
#define msdos_bfd_gc_sections bfd_generic_gc_sections
146
#define msdos_bfd_merge_sections bfd_generic_merge_sections
147
#define msdos_bfd_is_group_section bfd_generic_is_group_section
148
#define msdos_bfd_discard_group bfd_generic_discard_group
149
#define msdos_section_already_linked \
150
  _bfd_generic_section_already_linked
151
#define msdos_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
152
#define msdos_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
153
#define msdos_bfd_link_add_symbols _bfd_generic_link_add_symbols
154
#define msdos_bfd_link_just_syms _bfd_generic_link_just_syms
155
#define msdos_bfd_final_link _bfd_generic_final_link
156
#define msdos_bfd_link_split_section _bfd_generic_link_split_section
157
#define msdos_set_arch_mach _bfd_generic_set_arch_mach
158
 
159
#define msdos_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
160
#define msdos_canonicalize_symtab _bfd_nosymbols_canonicalize_symtab
161
#define msdos_print_symbol _bfd_nosymbols_print_symbol
162
#define msdos_get_symbol_info _bfd_nosymbols_get_symbol_info
163
#define msdos_find_nearest_line _bfd_nosymbols_find_nearest_line
164
#define msdos_find_inliner_info _bfd_nosymbols_find_inliner_info
165
#define msdos_get_lineno _bfd_nosymbols_get_lineno
166
#define msdos_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
167
#define msdos_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
168
#define msdos_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
169
#define msdos_read_minisymbols _bfd_nosymbols_read_minisymbols
170
#define msdos_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
171
 
172
#define msdos_canonicalize_reloc _bfd_norelocs_canonicalize_reloc
173
#define msdos_get_reloc_upper_bound _bfd_norelocs_get_reloc_upper_bound
174
#define msdos_32_bfd_link_split_section  _bfd_generic_link_split_section
175
 
176
const bfd_target i386msdos_vec =
177
  {
178
    "msdos",                    /* name */
179
    bfd_target_msdos_flavour,
180
    BFD_ENDIAN_LITTLE,          /* target byte order */
181
    BFD_ENDIAN_LITTLE,          /* target headers byte order */
182
    (EXEC_P),                   /* object flags */
183
    (SEC_CODE | SEC_DATA | SEC_HAS_CONTENTS
184
     | SEC_ALLOC | SEC_LOAD),   /* section flags */
185
    0,                           /* leading underscore */
186
    ' ',                                /* ar_pad_char */
187
    16,                         /* ar_max_namelen */
188
    bfd_getl64, bfd_getl_signed_64, bfd_putl64,
189
    bfd_getl32, bfd_getl_signed_32, bfd_putl32,
190
    bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
191
    bfd_getl64, bfd_getl_signed_64, bfd_putl64,
192
    bfd_getl32, bfd_getl_signed_32, bfd_putl32,
193
    bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
194
 
195
    {
196
      _bfd_dummy_target,
197
      _bfd_dummy_target,                /* bfd_check_format */
198
      _bfd_dummy_target,
199
      _bfd_dummy_target,
200
    },
201
    {
202
      bfd_false,
203
      msdos_mkobject,
204
      _bfd_generic_mkarchive,
205
      bfd_false,
206
    },
207
    {                           /* bfd_write_contents */
208
      bfd_false,
209
      msdos_write_object_contents,
210
      _bfd_write_archive_contents,
211
      bfd_false,
212
    },
213
 
214
    BFD_JUMP_TABLE_GENERIC (msdos),
215
    BFD_JUMP_TABLE_COPY (_bfd_generic),
216
    BFD_JUMP_TABLE_CORE (_bfd_nocore),
217
    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
218
    BFD_JUMP_TABLE_SYMBOLS (msdos),
219
    BFD_JUMP_TABLE_RELOCS (msdos),
220
    BFD_JUMP_TABLE_WRITE (msdos),
221
    BFD_JUMP_TABLE_LINK (msdos),
222
    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
223
 
224
    NULL,
225
 
226
    (PTR) 0
227
  };
228
 
229
 

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.