1/* MIPS-specific support for 64-bit ELF
2   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006, 2007
3   Free Software Foundation, Inc.
4   Ian Lance Taylor, Cygnus Support
5   Linker support added by Mark Mitchell, CodeSourcery, LLC.
6   <mark@codesourcery.com>
7
8   This file is part of BFD, the Binary File Descriptor library.
9
10   This program is free software; you can redistribute it and/or modify
11   it under the terms of the GNU General Public License as published by
12   the Free Software Foundation; either version 2 of the License, or
13   (at your option) any later version.
14
15   This program is distributed in the hope that it will be useful,
16   but WITHOUT ANY WARRANTY; without even the implied warranty of
17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18   GNU General Public License for more details.
19
20   You should have received a copy of the GNU General Public License
21   along with this program; if not, write to the Free Software
22   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
23
24/* This file supports the 64-bit (MIPS) ELF archives.  */
25
26#include "sysdep.h"
27#include "bfd.h"
28#include "libbfd.h"
29#include "aout/ar.h"
30
31/* Irix 6 defines a 64bit archive map format, so that they can
32   have archives more than 4 GB in size.  */
33
34bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
35bfd_boolean bfd_elf64_archive_write_armap
36  (bfd *, unsigned int, struct orl *, unsigned int, int);
37
38/* Read an Irix 6 armap.  */
39
40bfd_boolean
41bfd_elf64_archive_slurp_armap (bfd *abfd)
42{
43  struct artdata *ardata = bfd_ardata (abfd);
44  char nextname[17];
45  file_ptr arhdrpos;
46  bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;
47  struct areltdata *mapdata;
48  bfd_byte int_buf[8];
49  char *stringbase;
50  bfd_byte *raw_armap = NULL;
51  carsym *carsyms;
52  bfd_size_type amt;
53
54  ardata->symdefs = NULL;
55
56  /* Get the name of the first element.  */
57  arhdrpos = bfd_tell (abfd);
58  i = bfd_bread (nextname, 16, abfd);
59  if (i == 0)
60    return TRUE;
61  if (i != 16)
62    return FALSE;
63
64  if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
65    return FALSE;
66
67  /* Archives with traditional armaps are still permitted.  */
68  if (CONST_STRNEQ (nextname, "/               "))
69    return bfd_slurp_armap (abfd);
70
71  if (! CONST_STRNEQ (nextname, "/SYM64/         "))
72    {
73      bfd_has_map (abfd) = FALSE;
74      return TRUE;
75    }
76
77  mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
78  if (mapdata == NULL)
79    return FALSE;
80  parsed_size = mapdata->parsed_size;
81  bfd_release (abfd, mapdata);
82
83  if (bfd_bread (int_buf, 8, abfd) != 8)
84    {
85      if (bfd_get_error () != bfd_error_system_call)
86	bfd_set_error (bfd_error_malformed_archive);
87      return FALSE;
88    }
89
90  nsymz = bfd_getb64 (int_buf);
91  stringsize = parsed_size - 8 * nsymz - 8;
92
93  carsym_size = nsymz * sizeof (carsym);
94  ptrsize = 8 * nsymz;
95
96  amt = carsym_size + stringsize + 1;
97  ardata->symdefs = bfd_zalloc (abfd, amt);
98  if (ardata->symdefs == NULL)
99    return FALSE;
100  carsyms = ardata->symdefs;
101  stringbase = ((char *) ardata->symdefs) + carsym_size;
102
103  raw_armap = bfd_alloc (abfd, ptrsize);
104  if (raw_armap == NULL)
105    goto release_symdefs;
106
107  if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize
108      || bfd_bread (stringbase, stringsize, abfd) != stringsize)
109    {
110      if (bfd_get_error () != bfd_error_system_call)
111	bfd_set_error (bfd_error_malformed_archive);
112      goto release_raw_armap;
113    }
114
115  for (i = 0; i < nsymz; i++)
116    {
117      carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
118      carsyms->name = stringbase;
119      stringbase += strlen (stringbase) + 1;
120      ++carsyms;
121    }
122  *stringbase = '\0';
123
124  ardata->symdef_count = nsymz;
125  ardata->first_file_filepos = bfd_tell (abfd);
126  /* Pad to an even boundary if you have to.  */
127  ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
128
129  bfd_has_map (abfd) = TRUE;
130  bfd_release (abfd, raw_armap);
131
132  return TRUE;
133
134release_raw_armap:
135  bfd_release (abfd, raw_armap);
136release_symdefs:
137  bfd_release (abfd, ardata->symdefs);
138  return FALSE;
139}
140
141/* Write out an Irix 6 armap.  The Irix 6 tools are supposed to be
142   able to handle ordinary ELF armaps, but at least on Irix 6.2 the
143   linker crashes.  */
144
145bfd_boolean
146bfd_elf64_archive_write_armap (bfd *arch,
147			       unsigned int elength,
148			       struct orl *map,
149			       unsigned int symbol_count,
150			       int stridx)
151{
152  unsigned int ranlibsize = (symbol_count * 8) + 8;
153  unsigned int stringsize = stridx;
154  unsigned int mapsize = stringsize + ranlibsize;
155  file_ptr archive_member_file_ptr;
156  bfd *current = arch->archive_head;
157  unsigned int count;
158  struct ar_hdr hdr;
159  int padding;
160  bfd_byte buf[8];
161
162  padding = BFD_ALIGN (mapsize, 8) - mapsize;
163  mapsize += padding;
164
165  /* work out where the first object file will go in the archive */
166  archive_member_file_ptr = (mapsize
167			     + elength
168			     + sizeof (struct ar_hdr)
169			     + SARMAG);
170
171  memset (&hdr, ' ', sizeof (struct ar_hdr));
172  memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
173  _bfd_ar_spacepad (hdr.ar_size, sizeof (hdr.ar_size), "%-10ld",
174                    mapsize);
175  _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
176                    time (NULL));
177  /* This, at least, is what Intel coff sets the values to.: */
178  _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
179  _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
180  _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
181  memcpy (hdr.ar_fmag, ARFMAG, 2);
182
183  /* Write the ar header for this item and the number of symbols */
184
185  if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
186      != sizeof (struct ar_hdr))
187    return FALSE;
188
189  bfd_putb64 ((bfd_vma) symbol_count, buf);
190  if (bfd_bwrite (buf, 8, arch) != 8)
191    return FALSE;
192
193  /* Two passes, first write the file offsets for each symbol -
194     remembering that each offset is on a two byte boundary.  */
195
196  /* Write out the file offset for the file associated with each
197     symbol, and remember to keep the offsets padded out.  */
198
199  current = arch->archive_head;
200  count = 0;
201  while (current != NULL && count < symbol_count)
202    {
203      /* For each symbol which is used defined in this object, write out
204	 the object file's address in the archive */
205
206      while (map[count].u.abfd == current)
207	{
208	  bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
209	  if (bfd_bwrite (buf, 8, arch) != 8)
210	    return FALSE;
211	  count++;
212	}
213      /* Add size of this archive entry */
214      archive_member_file_ptr += (arelt_size (current)
215				  + sizeof (struct ar_hdr));
216      /* remember about the even alignment */
217      archive_member_file_ptr += archive_member_file_ptr % 2;
218      current = current->archive_next;
219    }
220
221  /* now write the strings themselves */
222  for (count = 0; count < symbol_count; count++)
223    {
224      size_t len = strlen (*map[count].name) + 1;
225
226      if (bfd_bwrite (*map[count].name, len, arch) != len)
227	return FALSE;
228    }
229
230  /* The spec says that this should be padded to an 8 byte boundary.
231     However, the Irix 6.2 tools do not appear to do this.  */
232  while (padding != 0)
233    {
234      if (bfd_bwrite ("", 1, arch) != 1)
235	return FALSE;
236      --padding;
237    }
238
239  return TRUE;
240}
241