aboutsummaryrefslogtreecommitdiff
path: root/bfd/archive64.c
blob: 7eb8331a3ed200874e96a5a029ebc84a9f6985c5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/* Support for 64-bit archives.
   Copyright (C) 1996-2023 Free Software Foundation, Inc.
   Ian Lance Taylor, Cygnus Support
   Linker support added by Mark Mitchell, CodeSourcery, LLC.
   <mark@codesourcery.com>

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

/* This file supports the 64-bit archives.  We use the same format as
   the 64-bit (MIPS) ELF archives.  */

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "aout/ar.h"

/* Irix 6 defines a 64bit archive map format, so that they can
   have archives more than 4 GB in size.  */

/* Read an Irix 6 armap.  */

bool
_bfd_archive_64_bit_slurp_armap (bfd *abfd)
{
  struct artdata *ardata = bfd_ardata (abfd);
  char nextname[17];
  bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;
  struct areltdata *mapdata;
  bfd_byte int_buf[8];
  char *stringbase;
  char *stringend;
  bfd_byte *raw_armap = NULL;
  carsym *carsyms;
  bfd_size_type amt;
  ufile_ptr filesize;

  ardata->symdefs = NULL;

  /* Get the name of the first element.  */
  i = bfd_bread (nextname, 16, abfd);
  if (i == 0)
    return true;
  if (i != 16)
    return false;

  if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
    return false;

  /* Archives with traditional armaps are still permitted.  */
  if (startswith (nextname, "/               "))
    return bfd_slurp_armap (abfd);

  if (! startswith (nextname, "/SYM64/         "))
    {
      abfd->has_armap = false;
      return true;
    }

  mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
  if (mapdata == NULL)
    return false;
  parsed_size = mapdata->parsed_size;
  free (mapdata);

  filesize = bfd_get_file_size (abfd);
  if (filesize != 0 && parsed_size > filesize)
    {
      bfd_set_error (bfd_error_malformed_archive);
      return false;
    }

  if (bfd_bread (int_buf, 8, abfd) != 8)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_malformed_archive);
      return false;
    }

  nsymz = bfd_getb64 (int_buf);
  stringsize = parsed_size - 8 * nsymz - 8;

  carsym_size = nsymz * sizeof (carsym);
  ptrsize = 8 * nsymz;

  amt = carsym_size + stringsize + 1;
  if (/* Catch overflow in stringsize (and ptrsize) expression.  */
      nsymz >= (bfd_size_type) -1 / 8
      || stringsize > parsed_size
      /* Catch overflow in carsym_size expression.  */
      || nsymz > (bfd_size_type) -1 / sizeof (carsym)
      /* Catch overflow in amt expression.  */
      || amt <= carsym_size
      || amt <= stringsize)
    {
      bfd_set_error (bfd_error_malformed_archive);
      return false;
    }
  ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt);
  if (ardata->symdefs == NULL)
    return false;
  carsyms = ardata->symdefs;
  stringbase = ((char *) ardata->symdefs) + carsym_size;

  raw_armap = (bfd_byte *) _bfd_alloc_and_read (abfd, ptrsize, ptrsize);
  if (raw_armap == NULL
      || bfd_bread (stringbase, stringsize, abfd) != stringsize)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_malformed_archive);
      goto release_symdefs;
    }

  stringend = stringbase + stringsize;
  *stringend = 0;
  for (i = 0; i < nsymz; i++)
    {
      carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
      carsyms->name = stringbase;
      stringbase += strlen (stringbase);
      if (stringbase != stringend)
	++stringbase;
      ++carsyms;
    }

  ardata->symdef_count = nsymz;
  ardata->first_file_filepos = bfd_tell (abfd);
  /* Pad to an even boundary if you have to.  */
  ardata->first_file_filepos += (ardata->first_file_filepos) % 2;

  abfd->has_armap = true;
  bfd_release (abfd, raw_armap);

  return true;

 release_symdefs:
  bfd_release (abfd, ardata->symdefs);
  return false;
}

/* Write out an Irix 6 armap.  The Irix 6 tools are supposed to be
   able to handle ordinary ELF armaps, but at least on Irix 6.2 the
   linker crashes.  */

bool
_bfd_archive_64_bit_write_armap (bfd *arch,
				 unsigned int elength,
				 struct orl *map,
				 unsigned int symbol_count,
				 int stridx)
{
  unsigned int ranlibsize = (symbol_count * 8) + 8;
  unsigned int stringsize = stridx;
  unsigned int mapsize = stringsize + ranlibsize;
  file_ptr archive_member_file_ptr;
  bfd *current = arch->archive_head;
  unsigned int count;
  struct ar_hdr hdr;
  int padding;
  bfd_byte buf[8];

  padding = BFD_ALIGN (mapsize, 8) - mapsize;
  mapsize += padding;

  /* work out where the first object file will go in the archive */
  archive_member_file_ptr = (mapsize
			     + elength
			     + sizeof (struct ar_hdr)
			     + SARMAG);

  memset (&hdr, ' ', sizeof (struct ar_hdr));
  memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
  if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize))
    return false;
  _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
		    time (NULL));
  /* This, at least, is what Intel coff sets the values to.: */
  _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
  _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
  _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
  memcpy (hdr.ar_fmag, ARFMAG, 2);

  /* Write the ar header for this item and the number of symbols */

  if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
      != sizeof (struct ar_hdr))
    return false;

  bfd_putb64 ((bfd_vma) symbol_count, buf);
  if (bfd_bwrite (buf, 8, arch) != 8)
    return false;

  /* Two passes, first write the file offsets for each symbol -
     remembering that each offset is on a two byte boundary.  */

  /* Write out the file offset for the file associated with each
     symbol, and remember to keep the offsets padded out.  */
  count = 0;
  for (current = arch->archive_head;
       current != NULL && count < symbol_count;
       current = current->archive_next)
    {
      /* For each symbol which is used defined in this object, write out
	 the object file's address in the archive.  */

      for (;
	   count < symbol_count && map[count].u.abfd == current;
	   count++)
	{
	  bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
	  if (bfd_bwrite (buf, 8, arch) != 8)
	    return false;
	}

      /* Add size of this archive entry */
      archive_member_file_ptr += sizeof (struct ar_hdr);
      if (! bfd_is_thin_archive (arch))
	archive_member_file_ptr += arelt_size (current);
      /* remember about the even alignment */
      archive_member_file_ptr += archive_member_file_ptr % 2;
    }

  /* now write the strings themselves */
  for (count = 0; count < symbol_count; count++)
    {
      size_t len = strlen (*map[count].name) + 1;

      if (bfd_bwrite (*map[count].name, len, arch) != len)
	return false;
    }

  /* The spec says that this should be padded to an 8 byte boundary.
     However, the Irix 6.2 tools do not appear to do this.  */
  while (padding != 0)
    {
      if (bfd_bwrite ("", 1, arch) != 1)
	return false;
      --padding;
    }

  return true;
}