1 /* Support for 64-bit archives.
2 Copyright (C) 1996-2022 Free Software Foundation, Inc.
3 Ian Lance Taylor, Cygnus Support
4 Linker support added by Mark Mitchell, CodeSourcery, LLC.
5 <mark@codesourcery.com>
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
23
24 /* This file supports the 64-bit archives. We use the same format as
25 the 64-bit (MIPS) ELF archives. */
26
27 #include "sysdep.h"
28 #include "bfd.h"
29 #include "libbfd.h"
30 #include "aout/ar.h"
31
32 /* Irix 6 defines a 64bit archive map format, so that they can
33 have archives more than 4 GB in size. */
34
35 /* Read an Irix 6 armap. */
36
37 bool
_bfd_archive_64_bit_slurp_armap(bfd * abfd)38 _bfd_archive_64_bit_slurp_armap (bfd *abfd)
39 {
40 struct artdata *ardata = bfd_ardata (abfd);
41 char nextname[17];
42 bfd_size_type i, parsed_size, nsymz, stringsize, carsym_size, ptrsize;
43 struct areltdata *mapdata;
44 bfd_byte int_buf[8];
45 char *stringbase;
46 char *stringend;
47 bfd_byte *raw_armap = NULL;
48 carsym *carsyms;
49 bfd_size_type amt;
50 ufile_ptr filesize;
51
52 ardata->symdefs = NULL;
53
54 /* Get the name of the first element. */
55 i = bfd_bread (nextname, 16, abfd);
56 if (i == 0)
57 return true;
58 if (i != 16)
59 return false;
60
61 if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0)
62 return false;
63
64 /* Archives with traditional armaps are still permitted. */
65 if (startswith (nextname, "/ "))
66 return bfd_slurp_armap (abfd);
67
68 if (! startswith (nextname, "/SYM64/ "))
69 {
70 abfd->has_armap = false;
71 return true;
72 }
73
74 mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
75 if (mapdata == NULL)
76 return false;
77 parsed_size = mapdata->parsed_size;
78 free (mapdata);
79
80 filesize = bfd_get_file_size (abfd);
81 if (filesize != 0 && parsed_size > filesize)
82 {
83 bfd_set_error (bfd_error_malformed_archive);
84 return false;
85 }
86
87 if (bfd_bread (int_buf, 8, abfd) != 8)
88 {
89 if (bfd_get_error () != bfd_error_system_call)
90 bfd_set_error (bfd_error_malformed_archive);
91 return false;
92 }
93
94 nsymz = bfd_getb64 (int_buf);
95 stringsize = parsed_size - 8 * nsymz - 8;
96
97 carsym_size = nsymz * sizeof (carsym);
98 ptrsize = 8 * nsymz;
99
100 amt = carsym_size + stringsize + 1;
101 if (/* Catch overflow in stringsize (and ptrsize) expression. */
102 nsymz >= (bfd_size_type) -1 / 8
103 || stringsize > parsed_size
104 /* Catch overflow in carsym_size expression. */
105 || nsymz > (bfd_size_type) -1 / sizeof (carsym)
106 /* Catch overflow in amt expression. */
107 || amt <= carsym_size
108 || amt <= stringsize)
109 {
110 bfd_set_error (bfd_error_malformed_archive);
111 return false;
112 }
113 ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt);
114 if (ardata->symdefs == NULL)
115 return false;
116 carsyms = ardata->symdefs;
117 stringbase = ((char *) ardata->symdefs) + carsym_size;
118
119 raw_armap = (bfd_byte *) _bfd_alloc_and_read (abfd, ptrsize, ptrsize);
120 if (raw_armap == NULL
121 || bfd_bread (stringbase, stringsize, abfd) != stringsize)
122 {
123 if (bfd_get_error () != bfd_error_system_call)
124 bfd_set_error (bfd_error_malformed_archive);
125 goto release_symdefs;
126 }
127
128 stringend = stringbase + stringsize;
129 *stringend = 0;
130 for (i = 0; i < nsymz; i++)
131 {
132 carsyms->file_offset = bfd_getb64 (raw_armap + i * 8);
133 carsyms->name = stringbase;
134 stringbase += strlen (stringbase);
135 if (stringbase != stringend)
136 ++stringbase;
137 ++carsyms;
138 }
139
140 ardata->symdef_count = nsymz;
141 ardata->first_file_filepos = bfd_tell (abfd);
142 /* Pad to an even boundary if you have to. */
143 ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
144
145 abfd->has_armap = true;
146 bfd_release (abfd, raw_armap);
147
148 return true;
149
150 release_symdefs:
151 bfd_release (abfd, ardata->symdefs);
152 return false;
153 }
154
155 /* Write out an Irix 6 armap. The Irix 6 tools are supposed to be
156 able to handle ordinary ELF armaps, but at least on Irix 6.2 the
157 linker crashes. */
158
159 bool
_bfd_archive_64_bit_write_armap(bfd * arch,unsigned int elength,struct orl * map,unsigned int symbol_count,int stridx)160 _bfd_archive_64_bit_write_armap (bfd *arch,
161 unsigned int elength,
162 struct orl *map,
163 unsigned int symbol_count,
164 int stridx)
165 {
166 unsigned int ranlibsize = (symbol_count * 8) + 8;
167 unsigned int stringsize = stridx;
168 unsigned int mapsize = stringsize + ranlibsize;
169 file_ptr archive_member_file_ptr;
170 bfd *current = arch->archive_head;
171 unsigned int count;
172 struct ar_hdr hdr;
173 int padding;
174 bfd_byte buf[8];
175
176 padding = BFD_ALIGN (mapsize, 8) - mapsize;
177 mapsize += padding;
178
179 /* work out where the first object file will go in the archive */
180 archive_member_file_ptr = (mapsize
181 + elength
182 + sizeof (struct ar_hdr)
183 + SARMAG);
184
185 memset (&hdr, ' ', sizeof (struct ar_hdr));
186 memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/"));
187 if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize))
188 return false;
189 _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
190 time (NULL));
191 /* This, at least, is what Intel coff sets the values to.: */
192 _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
193 _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
194 _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
195 memcpy (hdr.ar_fmag, ARFMAG, 2);
196
197 /* Write the ar header for this item and the number of symbols */
198
199 if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
200 != sizeof (struct ar_hdr))
201 return false;
202
203 bfd_putb64 ((bfd_vma) symbol_count, buf);
204 if (bfd_bwrite (buf, 8, arch) != 8)
205 return false;
206
207 /* Two passes, first write the file offsets for each symbol -
208 remembering that each offset is on a two byte boundary. */
209
210 /* Write out the file offset for the file associated with each
211 symbol, and remember to keep the offsets padded out. */
212 count = 0;
213 for (current = arch->archive_head;
214 current != NULL && count < symbol_count;
215 current = current->archive_next)
216 {
217 /* For each symbol which is used defined in this object, write out
218 the object file's address in the archive. */
219
220 for (;
221 count < symbol_count && map[count].u.abfd == current;
222 count++)
223 {
224 bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf);
225 if (bfd_bwrite (buf, 8, arch) != 8)
226 return false;
227 }
228
229 /* Add size of this archive entry */
230 archive_member_file_ptr += sizeof (struct ar_hdr);
231 if (! bfd_is_thin_archive (arch))
232 archive_member_file_ptr += arelt_size (current);
233 /* remember about the even alignment */
234 archive_member_file_ptr += archive_member_file_ptr % 2;
235 }
236
237 /* now write the strings themselves */
238 for (count = 0; count < symbol_count; count++)
239 {
240 size_t len = strlen (*map[count].name) + 1;
241
242 if (bfd_bwrite (*map[count].name, len, arch) != len)
243 return false;
244 }
245
246 /* The spec says that this should be padded to an 8 byte boundary.
247 However, the Irix 6.2 tools do not appear to do this. */
248 while (padding != 0)
249 {
250 if (bfd_bwrite ("", 1, arch) != 1)
251 return false;
252 --padding;
253 }
254
255 return true;
256 }
257