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1 | /* Support for 64-bit archives. | |
2 | Copyright (C) 1996-2020 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 | bfd_boolean | |
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 | ||
51 | ardata->symdefs = NULL; | |
52 | ||
53 | /* Get the name of the first element. */ | |
54 | i = bfd_bread (nextname, 16, abfd); | |
55 | if (i == 0) | |
56 | return TRUE; | |
57 | if (i != 16) | |
58 | return FALSE; | |
59 | ||
60 | if (bfd_seek (abfd, (file_ptr) - 16, SEEK_CUR) != 0) | |
61 | return FALSE; | |
62 | ||
63 | /* Archives with traditional armaps are still permitted. */ | |
64 | if (CONST_STRNEQ (nextname, "/ ")) | |
65 | return bfd_slurp_armap (abfd); | |
66 | ||
67 | if (! CONST_STRNEQ (nextname, "/SYM64/ ")) | |
68 | { | |
69 | abfd->has_armap = FALSE; | |
70 | return TRUE; | |
71 | } | |
72 | ||
73 | mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd); | |
74 | if (mapdata == NULL) | |
75 | return FALSE; | |
76 | parsed_size = mapdata->parsed_size; | |
77 | free (mapdata); | |
78 | ||
79 | if (bfd_bread (int_buf, 8, abfd) != 8) | |
80 | { | |
81 | if (bfd_get_error () != bfd_error_system_call) | |
82 | bfd_set_error (bfd_error_malformed_archive); | |
83 | return FALSE; | |
84 | } | |
85 | ||
86 | nsymz = bfd_getb64 (int_buf); | |
87 | stringsize = parsed_size - 8 * nsymz - 8; | |
88 | ||
89 | carsym_size = nsymz * sizeof (carsym); | |
90 | ptrsize = 8 * nsymz; | |
91 | ||
92 | amt = carsym_size + stringsize + 1; | |
93 | if (/* Catch overflow in stringsize (and ptrsize) expression. */ | |
94 | nsymz >= (bfd_size_type) -1 / 8 | |
95 | || stringsize > parsed_size | |
96 | /* Catch overflow in carsym_size expression. */ | |
97 | || nsymz > (bfd_size_type) -1 / sizeof (carsym) | |
98 | /* Catch overflow in amt expression. */ | |
99 | || amt <= carsym_size | |
100 | || amt <= stringsize) | |
101 | { | |
102 | bfd_set_error (bfd_error_malformed_archive); | |
103 | return FALSE; | |
104 | } | |
105 | ardata->symdefs = (struct carsym *) bfd_zalloc (abfd, amt); | |
106 | if (ardata->symdefs == NULL) | |
107 | return FALSE; | |
108 | carsyms = ardata->symdefs; | |
109 | stringbase = ((char *) ardata->symdefs) + carsym_size; | |
110 | ||
111 | raw_armap = (bfd_byte *) bfd_alloc (abfd, ptrsize); | |
112 | if (raw_armap == NULL) | |
113 | goto release_symdefs; | |
114 | ||
115 | if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize | |
116 | || bfd_bread (stringbase, stringsize, abfd) != stringsize) | |
117 | { | |
118 | if (bfd_get_error () != bfd_error_system_call) | |
119 | bfd_set_error (bfd_error_malformed_archive); | |
120 | goto release_raw_armap; | |
121 | } | |
122 | ||
123 | stringend = stringbase + stringsize; | |
124 | *stringend = 0; | |
125 | for (i = 0; i < nsymz; i++) | |
126 | { | |
127 | carsyms->file_offset = bfd_getb64 (raw_armap + i * 8); | |
128 | carsyms->name = stringbase; | |
129 | stringbase += strlen (stringbase); | |
130 | if (stringbase != stringend) | |
131 | ++stringbase; | |
132 | ++carsyms; | |
133 | } | |
134 | ||
135 | ardata->symdef_count = nsymz; | |
136 | ardata->first_file_filepos = bfd_tell (abfd); | |
137 | /* Pad to an even boundary if you have to. */ | |
138 | ardata->first_file_filepos += (ardata->first_file_filepos) % 2; | |
139 | ||
140 | abfd->has_armap = TRUE; | |
141 | bfd_release (abfd, raw_armap); | |
142 | ||
143 | return TRUE; | |
144 | ||
145 | release_raw_armap: | |
146 | bfd_release (abfd, raw_armap); | |
147 | release_symdefs: | |
148 | bfd_release (abfd, ardata->symdefs); | |
149 | return FALSE; | |
150 | } | |
151 | ||
152 | /* Write out an Irix 6 armap. The Irix 6 tools are supposed to be | |
153 | able to handle ordinary ELF armaps, but at least on Irix 6.2 the | |
154 | linker crashes. */ | |
155 | ||
156 | bfd_boolean | |
157 | _bfd_archive_64_bit_write_armap (bfd *arch, | |
158 | unsigned int elength, | |
159 | struct orl *map, | |
160 | unsigned int symbol_count, | |
161 | int stridx) | |
162 | { | |
163 | unsigned int ranlibsize = (symbol_count * 8) + 8; | |
164 | unsigned int stringsize = stridx; | |
165 | unsigned int mapsize = stringsize + ranlibsize; | |
166 | file_ptr archive_member_file_ptr; | |
167 | bfd *current = arch->archive_head; | |
168 | unsigned int count; | |
169 | struct ar_hdr hdr; | |
170 | int padding; | |
171 | bfd_byte buf[8]; | |
172 | ||
173 | padding = BFD_ALIGN (mapsize, 8) - mapsize; | |
174 | mapsize += padding; | |
175 | ||
176 | /* work out where the first object file will go in the archive */ | |
177 | archive_member_file_ptr = (mapsize | |
178 | + elength | |
179 | + sizeof (struct ar_hdr) | |
180 | + SARMAG); | |
181 | ||
182 | memset (&hdr, ' ', sizeof (struct ar_hdr)); | |
183 | memcpy (hdr.ar_name, "/SYM64/", strlen ("/SYM64/")); | |
184 | if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize)) | |
185 | return FALSE; | |
186 | _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld", | |
187 | time (NULL)); | |
188 | /* This, at least, is what Intel coff sets the values to.: */ | |
189 | _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0); | |
190 | _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0); | |
191 | _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0); | |
192 | memcpy (hdr.ar_fmag, ARFMAG, 2); | |
193 | ||
194 | /* Write the ar header for this item and the number of symbols */ | |
195 | ||
196 | if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch) | |
197 | != sizeof (struct ar_hdr)) | |
198 | return FALSE; | |
199 | ||
200 | bfd_putb64 ((bfd_vma) symbol_count, buf); | |
201 | if (bfd_bwrite (buf, 8, arch) != 8) | |
202 | return FALSE; | |
203 | ||
204 | /* Two passes, first write the file offsets for each symbol - | |
205 | remembering that each offset is on a two byte boundary. */ | |
206 | ||
207 | /* Write out the file offset for the file associated with each | |
208 | symbol, and remember to keep the offsets padded out. */ | |
209 | count = 0; | |
210 | for (current = arch->archive_head; | |
211 | current != NULL && count < symbol_count; | |
212 | current = current->archive_next) | |
213 | { | |
214 | /* For each symbol which is used defined in this object, write out | |
215 | the object file's address in the archive. */ | |
216 | ||
217 | for (; | |
218 | count < symbol_count && map[count].u.abfd == current; | |
219 | count++) | |
220 | { | |
221 | bfd_putb64 ((bfd_vma) archive_member_file_ptr, buf); | |
222 | if (bfd_bwrite (buf, 8, arch) != 8) | |
223 | return FALSE; | |
224 | } | |
225 | ||
226 | /* Add size of this archive entry */ | |
227 | archive_member_file_ptr += sizeof (struct ar_hdr); | |
228 | if (! bfd_is_thin_archive (arch)) | |
229 | archive_member_file_ptr += arelt_size (current); | |
230 | /* remember about the even alignment */ | |
231 | archive_member_file_ptr += archive_member_file_ptr % 2; | |
232 | } | |
233 | ||
234 | /* now write the strings themselves */ | |
235 | for (count = 0; count < symbol_count; count++) | |
236 | { | |
237 | size_t len = strlen (*map[count].name) + 1; | |
238 | ||
239 | if (bfd_bwrite (*map[count].name, len, arch) != len) | |
240 | return FALSE; | |
241 | } | |
242 | ||
243 | /* The spec says that this should be padded to an 8 byte boundary. | |
244 | However, the Irix 6.2 tools do not appear to do this. */ | |
245 | while (padding != 0) | |
246 | { | |
247 | if (bfd_bwrite ("", 1, arch) != 1) | |
248 | return FALSE; | |
249 | --padding; | |
250 | } | |
251 | ||
252 | return TRUE; | |
253 | } |