Commit | Line | Data |
---|---|---|
0b5538bd | 1 | /* Copyright (C) 1985, 1986, 1987, 1988, 1990, 1992, 1999, 2000, 2001, |
4e6835db | 2 | 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
d427b66a | 3 | |
3b7ad313 | 4 | This file is part of GNU Emacs. |
e40c4104 | 5 | |
3b7ad313 EN |
6 | GNU Emacs is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
e40c4104 | 10 | |
3b7ad313 EN |
11 | GNU Emacs is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
18 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
19 | Boston, MA 02110-1301, USA. | |
d427b66a JB |
20 | |
21 | In other words, you are welcome to use, share and improve this program. | |
22 | You are forbidden to forbid anyone else to use, share and improve | |
23 | what you give them. Help stamp out software-hoarding! */ | |
24 | ||
25 | ||
26 | /* | |
27 | * unexec.c - Convert a running program into an a.out file. | |
28 | * | |
29 | * Author: Spencer W. Thomas | |
30 | * Computer Science Dept. | |
31 | * University of Utah | |
32 | * Date: Tue Mar 2 1982 | |
33 | * Modified heavily since then. | |
34 | * | |
35 | * Synopsis: | |
89b95605 RS |
36 | * unexec (new_name, old_name, data_start, bss_start, entry_address) |
37 | * char *new_name, *old_name; | |
d427b66a JB |
38 | * unsigned data_start, bss_start, entry_address; |
39 | * | |
40 | * Takes a snapshot of the program and makes an a.out format file in the | |
41 | * file named by the string argument new_name. | |
89b95605 RS |
42 | * If old_name is non-NULL, the symbol table will be taken from the given file. |
43 | * On some machines, an existing old_name file is required. | |
d427b66a JB |
44 | * |
45 | * The boundaries within the a.out file may be adjusted with the data_start | |
46 | * and bss_start arguments. Either or both may be given as 0 for defaults. | |
47 | * | |
48 | * Data_start gives the boundary between the text segment and the data | |
49 | * segment of the program. The text segment can contain shared, read-only | |
50 | * program code and literal data, while the data segment is always unshared | |
51 | * and unprotected. Data_start gives the lowest unprotected address. | |
52 | * The value you specify may be rounded down to a suitable boundary | |
53 | * as required by the machine you are using. | |
54 | * | |
d427b66a JB |
55 | * Bss_start indicates how much of the data segment is to be saved in the |
56 | * a.out file and restored when the program is executed. It gives the lowest | |
57 | * unsaved address, and is rounded up to a page boundary. The default when 0 | |
58 | * is given assumes that the entire data segment is to be stored, including | |
59 | * the previous data and bss as well as any additional storage allocated with | |
60 | * break (2). | |
61 | * | |
62 | * The new file is set up to start at entry_address. | |
63 | * | |
d427b66a JB |
64 | */ |
65 | ||
66 | /* Even more heavily modified by james@bigtex.cactus.org of Dell Computer Co. | |
67 | * ELF support added. | |
68 | * | |
69 | * Basic theory: the data space of the running process needs to be | |
70 | * dumped to the output file. Normally we would just enlarge the size | |
71 | * of .data, scooting everything down. But we can't do that in ELF, | |
72 | * because there is often something between the .data space and the | |
73 | * .bss space. | |
74 | * | |
75 | * In the temacs dump below, notice that the Global Offset Table | |
76 | * (.got) and the Dynamic link data (.dynamic) come between .data1 and | |
77 | * .bss. It does not work to overlap .data with these fields. | |
78 | * | |
79 | * The solution is to create a new .data segment. This segment is | |
80 | * filled with data from the current process. Since the contents of | |
81 | * various sections refer to sections by index, the new .data segment | |
82 | * is made the last in the table to avoid changing any existing index. | |
83 | ||
84 | * This is an example of how the section headers are changed. "Addr" | |
85 | * is a process virtual address. "Offset" is a file offset. | |
86 | ||
87 | raid:/nfs/raid/src/dist-18.56/src> dump -h temacs | |
88 | ||
89 | temacs: | |
90 | ||
91 | **** SECTION HEADER TABLE **** | |
7da3d06f DL |
92 | [No] Type Flags Addr Offset Size Name |
93 | Link Info Adralgn Entsize | |
d427b66a | 94 | |
7da3d06f DL |
95 | [1] 1 2 0x80480d4 0xd4 0x13 .interp |
96 | 0 0 0x1 0 | |
d427b66a | 97 | |
7da3d06f DL |
98 | [2] 5 2 0x80480e8 0xe8 0x388 .hash |
99 | 3 0 0x4 0x4 | |
d427b66a | 100 | |
7da3d06f DL |
101 | [3] 11 2 0x8048470 0x470 0x7f0 .dynsym |
102 | 4 1 0x4 0x10 | |
d427b66a | 103 | |
7da3d06f DL |
104 | [4] 3 2 0x8048c60 0xc60 0x3ad .dynstr |
105 | 0 0 0x1 0 | |
d427b66a | 106 | |
7da3d06f DL |
107 | [5] 9 2 0x8049010 0x1010 0x338 .rel.plt |
108 | 3 7 0x4 0x8 | |
d427b66a | 109 | |
7da3d06f DL |
110 | [6] 1 6 0x8049348 0x1348 0x3 .init |
111 | 0 0 0x4 0 | |
d427b66a | 112 | |
7da3d06f DL |
113 | [7] 1 6 0x804934c 0x134c 0x680 .plt |
114 | 0 0 0x4 0x4 | |
d427b66a | 115 | |
7da3d06f DL |
116 | [8] 1 6 0x80499cc 0x19cc 0x3c56f .text |
117 | 0 0 0x4 0 | |
d427b66a | 118 | |
7da3d06f DL |
119 | [9] 1 6 0x8085f3c 0x3df3c 0x3 .fini |
120 | 0 0 0x4 0 | |
d427b66a | 121 | |
7da3d06f DL |
122 | [10] 1 2 0x8085f40 0x3df40 0x69c .rodata |
123 | 0 0 0x4 0 | |
d427b66a | 124 | |
7da3d06f DL |
125 | [11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1 |
126 | 0 0 0x4 0 | |
d427b66a | 127 | |
7da3d06f DL |
128 | [12] 1 3 0x8088330 0x3f330 0x20afc .data |
129 | 0 0 0x4 0 | |
d427b66a | 130 | |
7da3d06f DL |
131 | [13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1 |
132 | 0 0 0x4 0 | |
d427b66a | 133 | |
7da3d06f DL |
134 | [14] 1 3 0x80a96cc 0x606cc 0x1a8 .got |
135 | 0 0 0x4 0x4 | |
d427b66a | 136 | |
7da3d06f DL |
137 | [15] 6 3 0x80a9874 0x60874 0x80 .dynamic |
138 | 4 0 0x4 0x8 | |
d427b66a | 139 | |
7da3d06f DL |
140 | [16] 8 3 0x80a98f4 0x608f4 0x449c .bss |
141 | 0 0 0x4 0 | |
d427b66a | 142 | |
7da3d06f DL |
143 | [17] 2 0 0 0x608f4 0x9b90 .symtab |
144 | 18 371 0x4 0x10 | |
d427b66a | 145 | |
7da3d06f DL |
146 | [18] 3 0 0 0x6a484 0x8526 .strtab |
147 | 0 0 0x1 0 | |
d427b66a | 148 | |
7da3d06f DL |
149 | [19] 3 0 0 0x729aa 0x93 .shstrtab |
150 | 0 0 0x1 0 | |
d427b66a | 151 | |
7da3d06f DL |
152 | [20] 1 0 0 0x72a3d 0x68b7 .comment |
153 | 0 0 0x1 0 | |
d427b66a | 154 | |
7da3d06f | 155 | raid:/nfs/raid/src/dist-18.56/src> dump -h xemacs |
d427b66a | 156 | |
7da3d06f | 157 | xemacs: |
d427b66a | 158 | |
7da3d06f DL |
159 | **** SECTION HEADER TABLE **** |
160 | [No] Type Flags Addr Offset Size Name | |
161 | Link Info Adralgn Entsize | |
d427b66a | 162 | |
7da3d06f DL |
163 | [1] 1 2 0x80480d4 0xd4 0x13 .interp |
164 | 0 0 0x1 0 | |
d427b66a | 165 | |
7da3d06f DL |
166 | [2] 5 2 0x80480e8 0xe8 0x388 .hash |
167 | 3 0 0x4 0x4 | |
d427b66a | 168 | |
7da3d06f DL |
169 | [3] 11 2 0x8048470 0x470 0x7f0 .dynsym |
170 | 4 1 0x4 0x10 | |
d427b66a | 171 | |
7da3d06f DL |
172 | [4] 3 2 0x8048c60 0xc60 0x3ad .dynstr |
173 | 0 0 0x1 0 | |
d427b66a | 174 | |
7da3d06f DL |
175 | [5] 9 2 0x8049010 0x1010 0x338 .rel.plt |
176 | 3 7 0x4 0x8 | |
d427b66a | 177 | |
7da3d06f DL |
178 | [6] 1 6 0x8049348 0x1348 0x3 .init |
179 | 0 0 0x4 0 | |
d427b66a | 180 | |
7da3d06f DL |
181 | [7] 1 6 0x804934c 0x134c 0x680 .plt |
182 | 0 0 0x4 0x4 | |
d427b66a | 183 | |
7da3d06f DL |
184 | [8] 1 6 0x80499cc 0x19cc 0x3c56f .text |
185 | 0 0 0x4 0 | |
d427b66a | 186 | |
7da3d06f DL |
187 | [9] 1 6 0x8085f3c 0x3df3c 0x3 .fini |
188 | 0 0 0x4 0 | |
d427b66a | 189 | |
7da3d06f DL |
190 | [10] 1 2 0x8085f40 0x3df40 0x69c .rodata |
191 | 0 0 0x4 0 | |
d427b66a | 192 | |
7da3d06f DL |
193 | [11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1 |
194 | 0 0 0x4 0 | |
d427b66a | 195 | |
7da3d06f DL |
196 | [12] 1 3 0x8088330 0x3f330 0x20afc .data |
197 | 0 0 0x4 0 | |
d427b66a | 198 | |
7da3d06f DL |
199 | [13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1 |
200 | 0 0 0x4 0 | |
d427b66a | 201 | |
7da3d06f DL |
202 | [14] 1 3 0x80a96cc 0x606cc 0x1a8 .got |
203 | 0 0 0x4 0x4 | |
d427b66a | 204 | |
7da3d06f DL |
205 | [15] 6 3 0x80a9874 0x60874 0x80 .dynamic |
206 | 4 0 0x4 0x8 | |
d427b66a | 207 | |
7da3d06f DL |
208 | [16] 8 3 0x80c6800 0x7d800 0 .bss |
209 | 0 0 0x4 0 | |
d427b66a | 210 | |
7da3d06f DL |
211 | [17] 2 0 0 0x7d800 0x9b90 .symtab |
212 | 18 371 0x4 0x10 | |
d427b66a | 213 | |
7da3d06f DL |
214 | [18] 3 0 0 0x87390 0x8526 .strtab |
215 | 0 0 0x1 0 | |
d427b66a | 216 | |
7da3d06f DL |
217 | [19] 3 0 0 0x8f8b6 0x93 .shstrtab |
218 | 0 0 0x1 0 | |
d427b66a | 219 | |
7da3d06f DL |
220 | [20] 1 0 0 0x8f949 0x68b7 .comment |
221 | 0 0 0x1 0 | |
d427b66a | 222 | |
7da3d06f DL |
223 | [21] 1 3 0x80a98f4 0x608f4 0x1cf0c .data |
224 | 0 0 0x4 0 | |
d427b66a | 225 | |
7da3d06f DL |
226 | * This is an example of how the file header is changed. "Shoff" is |
227 | * the section header offset within the file. Since that table is | |
228 | * after the new .data section, it is moved. "Shnum" is the number of | |
229 | * sections, which we increment. | |
230 | * | |
231 | * "Phoff" is the file offset to the program header. "Phentsize" and | |
232 | * "Shentsz" are the program and section header entries sizes respectively. | |
233 | * These can be larger than the apparent struct sizes. | |
d427b66a | 234 | |
7da3d06f | 235 | raid:/nfs/raid/src/dist-18.56/src> dump -f temacs |
d427b66a | 236 | |
7da3d06f | 237 | temacs: |
d427b66a | 238 | |
7da3d06f DL |
239 | **** ELF HEADER **** |
240 | Class Data Type Machine Version | |
241 | Entry Phoff Shoff Flags Ehsize | |
242 | Phentsize Phnum Shentsz Shnum Shstrndx | |
d427b66a | 243 | |
7da3d06f DL |
244 | 1 1 2 3 1 |
245 | 0x80499cc 0x34 0x792f4 0 0x34 | |
246 | 0x20 5 0x28 21 19 | |
d427b66a | 247 | |
7da3d06f | 248 | raid:/nfs/raid/src/dist-18.56/src> dump -f xemacs |
d427b66a | 249 | |
7da3d06f | 250 | xemacs: |
d427b66a | 251 | |
7da3d06f DL |
252 | **** ELF HEADER **** |
253 | Class Data Type Machine Version | |
254 | Entry Phoff Shoff Flags Ehsize | |
255 | Phentsize Phnum Shentsz Shnum Shstrndx | |
d427b66a | 256 | |
7da3d06f DL |
257 | 1 1 2 3 1 |
258 | 0x80499cc 0x34 0x96200 0 0x34 | |
259 | 0x20 5 0x28 22 19 | |
d427b66a | 260 | |
7da3d06f DL |
261 | * These are the program headers. "Offset" is the file offset to the |
262 | * segment. "Vaddr" is the memory load address. "Filesz" is the | |
263 | * segment size as it appears in the file, and "Memsz" is the size in | |
264 | * memory. Below, the third segment is the code and the fourth is the | |
265 | * data: the difference between Filesz and Memsz is .bss | |
d427b66a | 266 | |
7da3d06f | 267 | raid:/nfs/raid/src/dist-18.56/src> dump -o temacs |
d427b66a | 268 | |
7da3d06f DL |
269 | temacs: |
270 | ***** PROGRAM EXECUTION HEADER ***** | |
271 | Type Offset Vaddr Paddr | |
272 | Filesz Memsz Flags Align | |
d427b66a | 273 | |
7da3d06f DL |
274 | 6 0x34 0x8048034 0 |
275 | 0xa0 0xa0 5 0 | |
d427b66a | 276 | |
7da3d06f DL |
277 | 3 0xd4 0 0 |
278 | 0x13 0 4 0 | |
d427b66a | 279 | |
7da3d06f DL |
280 | 1 0x34 0x8048034 0 |
281 | 0x3f2f9 0x3f2f9 5 0x1000 | |
d427b66a | 282 | |
7da3d06f DL |
283 | 1 0x3f330 0x8088330 0 |
284 | 0x215c4 0x25a60 7 0x1000 | |
d427b66a | 285 | |
7da3d06f DL |
286 | 2 0x60874 0x80a9874 0 |
287 | 0x80 0 7 0 | |
d427b66a | 288 | |
7da3d06f | 289 | raid:/nfs/raid/src/dist-18.56/src> dump -o xemacs |
d427b66a | 290 | |
7da3d06f DL |
291 | xemacs: |
292 | ***** PROGRAM EXECUTION HEADER ***** | |
293 | Type Offset Vaddr Paddr | |
294 | Filesz Memsz Flags Align | |
d427b66a | 295 | |
7da3d06f DL |
296 | 6 0x34 0x8048034 0 |
297 | 0xa0 0xa0 5 0 | |
d427b66a | 298 | |
7da3d06f DL |
299 | 3 0xd4 0 0 |
300 | 0x13 0 4 0 | |
d427b66a | 301 | |
7da3d06f DL |
302 | 1 0x34 0x8048034 0 |
303 | 0x3f2f9 0x3f2f9 5 0x1000 | |
d427b66a | 304 | |
7da3d06f DL |
305 | 1 0x3f330 0x8088330 0 |
306 | 0x3e4d0 0x3e4d0 7 0x1000 | |
d427b66a | 307 | |
7da3d06f DL |
308 | 2 0x60874 0x80a9874 0 |
309 | 0x80 0 7 0 | |
d427b66a JB |
310 | |
311 | ||
312 | */ | |
e40c4104 | 313 | \f |
994a65f3 RM |
314 | /* Modified by wtien@urbana.mcd.mot.com of Motorola Inc. |
315 | * | |
e40c4104 | 316 | * The above mechanism does not work if the unexeced ELF file is being |
994a65f3 | 317 | * re-layout by other applications (such as `strip'). All the applications |
e40c4104 | 318 | * that re-layout the internal of ELF will layout all sections in ascending |
994a65f3 RM |
319 | * order of their file offsets. After the re-layout, the data2 section will |
320 | * still be the LAST section in the section header vector, but its file offset | |
e40c4104 | 321 | * is now being pushed far away down, and causes part of it not to be mapped |
994a65f3 | 322 | * in (ie. not covered by the load segment entry in PHDR vector), therefore |
e40c4104 RS |
323 | * causes the new binary to fail. |
324 | * | |
325 | * The solution is to modify the unexec algorithm to insert the new data2 | |
326 | * section header right before the new bss section header, so their file | |
994a65f3 RM |
327 | * offsets will be in the ascending order. Since some of the section's (all |
328 | * sections AFTER the bss section) indexes are now changed, we also need to | |
329 | * modify some fields to make them point to the right sections. This is done | |
e40c4104 | 330 | * by macro PATCH_INDEX. All the fields that need to be patched are: |
994a65f3 | 331 | * |
e40c4104 RS |
332 | * 1. ELF header e_shstrndx field. |
333 | * 2. section header sh_link and sh_info field. | |
334 | * 3. symbol table entry st_shndx field. | |
335 | * | |
336 | * The above example now should look like: | |
337 | ||
338 | **** SECTION HEADER TABLE **** | |
7da3d06f DL |
339 | [No] Type Flags Addr Offset Size Name |
340 | Link Info Adralgn Entsize | |
e40c4104 | 341 | |
7da3d06f DL |
342 | [1] 1 2 0x80480d4 0xd4 0x13 .interp |
343 | 0 0 0x1 0 | |
d427b66a | 344 | |
7da3d06f DL |
345 | [2] 5 2 0x80480e8 0xe8 0x388 .hash |
346 | 3 0 0x4 0x4 | |
e40c4104 | 347 | |
7da3d06f DL |
348 | [3] 11 2 0x8048470 0x470 0x7f0 .dynsym |
349 | 4 1 0x4 0x10 | |
e40c4104 | 350 | |
7da3d06f DL |
351 | [4] 3 2 0x8048c60 0xc60 0x3ad .dynstr |
352 | 0 0 0x1 0 | |
e40c4104 | 353 | |
7da3d06f DL |
354 | [5] 9 2 0x8049010 0x1010 0x338 .rel.plt |
355 | 3 7 0x4 0x8 | |
e40c4104 | 356 | |
7da3d06f DL |
357 | [6] 1 6 0x8049348 0x1348 0x3 .init |
358 | 0 0 0x4 0 | |
e40c4104 | 359 | |
7da3d06f DL |
360 | [7] 1 6 0x804934c 0x134c 0x680 .plt |
361 | 0 0 0x4 0x4 | |
e40c4104 | 362 | |
7da3d06f DL |
363 | [8] 1 6 0x80499cc 0x19cc 0x3c56f .text |
364 | 0 0 0x4 0 | |
e40c4104 | 365 | |
7da3d06f DL |
366 | [9] 1 6 0x8085f3c 0x3df3c 0x3 .fini |
367 | 0 0 0x4 0 | |
e40c4104 | 368 | |
7da3d06f DL |
369 | [10] 1 2 0x8085f40 0x3df40 0x69c .rodata |
370 | 0 0 0x4 0 | |
e40c4104 | 371 | |
7da3d06f DL |
372 | [11] 1 2 0x80865dc 0x3e5dc 0xd51 .rodata1 |
373 | 0 0 0x4 0 | |
e40c4104 | 374 | |
7da3d06f DL |
375 | [12] 1 3 0x8088330 0x3f330 0x20afc .data |
376 | 0 0 0x4 0 | |
e40c4104 | 377 | |
7da3d06f DL |
378 | [13] 1 3 0x80a8e2c 0x5fe2c 0x89d .data1 |
379 | 0 0 0x4 0 | |
e40c4104 | 380 | |
7da3d06f DL |
381 | [14] 1 3 0x80a96cc 0x606cc 0x1a8 .got |
382 | 0 0 0x4 0x4 | |
e40c4104 | 383 | |
7da3d06f DL |
384 | [15] 6 3 0x80a9874 0x60874 0x80 .dynamic |
385 | 4 0 0x4 0x8 | |
e40c4104 | 386 | |
7da3d06f DL |
387 | [16] 1 3 0x80a98f4 0x608f4 0x1cf0c .data |
388 | 0 0 0x4 0 | |
e40c4104 | 389 | |
7da3d06f DL |
390 | [17] 8 3 0x80c6800 0x7d800 0 .bss |
391 | 0 0 0x4 0 | |
e40c4104 | 392 | |
7da3d06f DL |
393 | [18] 2 0 0 0x7d800 0x9b90 .symtab |
394 | 19 371 0x4 0x10 | |
e40c4104 | 395 | |
7da3d06f DL |
396 | [19] 3 0 0 0x87390 0x8526 .strtab |
397 | 0 0 0x1 0 | |
e40c4104 | 398 | |
7da3d06f DL |
399 | [20] 3 0 0 0x8f8b6 0x93 .shstrtab |
400 | 0 0 0x1 0 | |
e40c4104 | 401 | |
7da3d06f DL |
402 | [21] 1 0 0 0x8f949 0x68b7 .comment |
403 | 0 0 0x1 0 | |
e40c4104 RS |
404 | |
405 | */ | |
406 | \f | |
d9d54213 RS |
407 | /* We do not use mmap because that fails with NFS. |
408 | Instead we read the whole file, modify it, and write it out. */ | |
409 | ||
1b963cdd DL |
410 | #ifndef emacs |
411 | #define fatal(a, b, c) fprintf (stderr, a, b, c), exit (1) | |
6b7d4ae4 | 412 | #include <string.h> |
1b963cdd DL |
413 | #else |
414 | #include <config.h> | |
fa8459a3 | 415 | extern void fatal (const char *msgid, ...); |
1b963cdd DL |
416 | #endif |
417 | ||
d427b66a JB |
418 | #include <sys/types.h> |
419 | #include <stdio.h> | |
420 | #include <sys/stat.h> | |
421 | #include <memory.h> | |
d427b66a JB |
422 | #include <errno.h> |
423 | #include <unistd.h> | |
424 | #include <fcntl.h> | |
cb1ee811 | 425 | #if !defined (__NetBSD__) && !defined (__OpenBSD__) |
d427b66a | 426 | #include <elf.h> |
e5d0f709 | 427 | #endif |
d427b66a | 428 | #include <sys/mman.h> |
9240b21d RS |
429 | #if defined (__sony_news) && defined (_SYSTYPE_SYSV) |
430 | #include <sys/elf_mips.h> | |
431 | #include <sym.h> | |
432 | #endif /* __sony_news && _SYSTYPE_SYSV */ | |
bc597cc7 | 433 | #if __sgi |
52da6a59 | 434 | #include <syms.h> /* for HDRR declaration */ |
bc597cc7 | 435 | #endif /* __sgi */ |
8daaf78b EZ |
436 | #ifdef BROKEN_NOCOMBRELOC |
437 | #include <assert.h> | |
438 | #endif | |
4dbcac31 | 439 | |
aff37336 SS |
440 | #ifndef MAP_ANON |
441 | #ifdef MAP_ANONYMOUS | |
442 | #define MAP_ANON MAP_ANONYMOUS | |
443 | #else | |
444 | #define MAP_ANON 0 | |
445 | #endif | |
446 | #endif | |
447 | ||
448 | #ifndef MAP_FAILED | |
449 | #define MAP_FAILED ((void *) -1) | |
450 | #endif | |
451 | ||
cb1ee811 | 452 | #if defined (__alpha__) && !defined (__NetBSD__) && !defined (__OpenBSD__) |
eabb24d0 RS |
453 | /* Declare COFF debugging symbol table. This used to be in |
454 | /usr/include/sym.h, but this file is no longer included in Red Hat | |
455 | 5.0 and presumably in any other glibc 2.x based distribution. */ | |
456 | typedef struct { | |
457 | short magic; | |
458 | short vstamp; | |
459 | int ilineMax; | |
460 | int idnMax; | |
461 | int ipdMax; | |
462 | int isymMax; | |
463 | int ioptMax; | |
464 | int iauxMax; | |
465 | int issMax; | |
466 | int issExtMax; | |
467 | int ifdMax; | |
468 | int crfd; | |
469 | int iextMax; | |
470 | long cbLine; | |
471 | long cbLineOffset; | |
472 | long cbDnOffset; | |
473 | long cbPdOffset; | |
474 | long cbSymOffset; | |
475 | long cbOptOffset; | |
476 | long cbAuxOffset; | |
477 | long cbSsOffset; | |
478 | long cbSsExtOffset; | |
479 | long cbFdOffset; | |
480 | long cbRfdOffset; | |
481 | long cbExtOffset; | |
7da3d06f | 482 | } HDRR, *pHDRR; |
eabb24d0 RS |
483 | #define cbHDRR sizeof(HDRR) |
484 | #define hdrNil ((pHDRR)0) | |
265b2695 RS |
485 | #endif |
486 | ||
e5d0f709 RS |
487 | #ifdef __NetBSD__ |
488 | /* | |
489 | * NetBSD does not have normal-looking user-land ELF support. | |
490 | */ | |
3af5762e | 491 | # if defined __alpha__ || defined __sparc_v9__ |
e5d0f709 RS |
492 | # define ELFSIZE 64 |
493 | # else | |
494 | # define ELFSIZE 32 | |
495 | # endif | |
496 | # include <sys/exec_elf.h> | |
497 | ||
0007072a KR |
498 | # ifndef PT_LOAD |
499 | # define PT_LOAD Elf_pt_load | |
f4db570c GM |
500 | # if 0 /* was in pkgsrc patches for 20.7 */ |
501 | # define SHT_PROGBITS Elf_sht_progbits | |
502 | # endif | |
0007072a KR |
503 | # define SHT_SYMTAB Elf_sht_symtab |
504 | # define SHT_DYNSYM Elf_sht_dynsym | |
505 | # define SHT_NULL Elf_sht_null | |
506 | # define SHT_NOBITS Elf_sht_nobits | |
507 | # define SHT_REL Elf_sht_rel | |
508 | # define SHT_RELA Elf_sht_rela | |
509 | ||
510 | # define SHN_UNDEF Elf_eshn_undefined | |
511 | # define SHN_ABS Elf_eshn_absolute | |
512 | # define SHN_COMMON Elf_eshn_common | |
f4db570c | 513 | # endif /* !PT_LOAD */ |
e5d0f709 | 514 | |
e5d0f709 RS |
515 | # ifdef __alpha__ |
516 | # include <sys/exec_ecoff.h> | |
517 | # define HDRR struct ecoff_symhdr | |
518 | # define pHDRR HDRR * | |
f4db570c | 519 | # endif /* __alpha__ */ |
e5d0f709 | 520 | |
6b7d4ae4 | 521 | #ifdef __mips__ /* was in pkgsrc patches for 20.7 */ |
f4db570c GM |
522 | # define SHT_MIPS_DEBUG DT_MIPS_FLAGS |
523 | # define HDRR struct Elf_Shdr | |
524 | #endif /* __mips__ */ | |
6b7d4ae4 | 525 | #endif /* __NetBSD__ */ |
f4db570c | 526 | |
cb1ee811 RS |
527 | #ifdef __OpenBSD__ |
528 | # include <sys/exec_elf.h> | |
529 | #endif | |
530 | ||
265b2695 RS |
531 | #if __GNU_LIBRARY__ - 0 >= 6 |
532 | # include <link.h> /* get ElfW etc */ | |
533 | #endif | |
534 | ||
535 | #ifndef ElfW | |
536 | # ifdef __STDC__ | |
1b963cdd | 537 | # define ElfBitsW(bits, type) Elf##bits##_##type |
68c45bf0 | 538 | # else |
1b963cdd | 539 | # define ElfBitsW(bits, type) Elf/**/bits/**/_/**/type |
68c45bf0 | 540 | # endif |
1b963cdd DL |
541 | # ifdef _LP64 |
542 | # define ELFSIZE 64 | |
543 | # else | |
544 | # define ELFSIZE 32 | |
545 | # endif | |
546 | /* This macro expands `bits' before invoking ElfBitsW. */ | |
547 | # define ElfExpandBitsW(bits, type) ElfBitsW (bits, type) | |
548 | # define ElfW(type) ElfExpandBitsW (ELFSIZE, type) | |
d427b66a JB |
549 | #endif |
550 | ||
d8858cfe RS |
551 | #ifndef ELF_BSS_SECTION_NAME |
552 | #define ELF_BSS_SECTION_NAME ".bss" | |
553 | #endif | |
554 | ||
d427b66a JB |
555 | /* Get the address of a particular section or program header entry, |
556 | * accounting for the size of the entries. | |
557 | */ | |
bc597cc7 | 558 | /* |
ea083293 RS |
559 | On PPC Reference Platform running Solaris 2.5.1 |
560 | the plt section is also of type NOBI like the bss section. | |
561 | (not really stored) and therefore sections after the bss | |
562 | section start at the plt offset. The plt section is always | |
563 | the one just before the bss section. | |
564 | Thus, we modify the test from | |
565 | if (NEW_SECTION_H (nn).sh_offset >= new_data2_offset) | |
566 | to | |
bc597cc7 | 567 | if (NEW_SECTION_H (nn).sh_offset >= |
ea083293 RS |
568 | OLD_SECTION_H (old_bss_index-1).sh_offset) |
569 | This is just a hack. We should put the new data section | |
570 | before the .plt section. | |
571 | And we should not have this routine at all but use | |
572 | the libelf library to read the old file and create the new | |
573 | file. | |
574 | The changed code is minimal and depends on prep set in m/prep.h | |
575 | Erik Deumens | |
576 | Quantum Theory Project | |
577 | University of Florida | |
578 | deumens@qtp.ufl.edu | |
579 | Apr 23, 1996 | |
580 | */ | |
d427b66a JB |
581 | |
582 | #define OLD_SECTION_H(n) \ | |
265b2695 | 583 | (*(ElfW(Shdr) *) ((byte *) old_section_h + old_file_h->e_shentsize * (n))) |
d427b66a | 584 | #define NEW_SECTION_H(n) \ |
265b2695 | 585 | (*(ElfW(Shdr) *) ((byte *) new_section_h + new_file_h->e_shentsize * (n))) |
d427b66a | 586 | #define OLD_PROGRAM_H(n) \ |
265b2695 | 587 | (*(ElfW(Phdr) *) ((byte *) old_program_h + old_file_h->e_phentsize * (n))) |
d427b66a | 588 | #define NEW_PROGRAM_H(n) \ |
265b2695 | 589 | (*(ElfW(Phdr) *) ((byte *) new_program_h + new_file_h->e_phentsize * (n))) |
d427b66a | 590 | |
e40c4104 RS |
591 | #define PATCH_INDEX(n) \ |
592 | do { \ | |
d7cb42c3 | 593 | if ((int) (n) >= old_bss_index) \ |
e40c4104 | 594 | (n)++; } while (0) |
d427b66a JB |
595 | typedef unsigned char byte; |
596 | ||
e40c4104 RS |
597 | /* Round X up to a multiple of Y. */ |
598 | ||
bc597cc7 | 599 | static ElfW(Addr) |
e40c4104 | 600 | round_up (x, y) |
4461bfd3 | 601 | ElfW(Addr) x, y; |
e40c4104 RS |
602 | { |
603 | int rem = x % y; | |
604 | if (rem == 0) | |
605 | return x; | |
606 | return x - rem + y; | |
607 | } | |
608 | ||
52da6a59 GM |
609 | /* Return the index of the section named NAME. |
610 | SECTION_NAMES, FILE_NAME and FILE_H give information | |
611 | about the file we are looking in. | |
612 | ||
613 | If we don't find the section NAME, that is a fatal error | |
614 | if NOERROR is 0; we return -1 if NOERROR is nonzero. */ | |
615 | ||
616 | static int | |
617 | find_section (name, section_names, file_name, old_file_h, old_section_h, noerror) | |
618 | char *name; | |
619 | char *section_names; | |
620 | char *file_name; | |
621 | ElfW(Ehdr) *old_file_h; | |
622 | ElfW(Shdr) *old_section_h; | |
623 | int noerror; | |
624 | { | |
625 | int idx; | |
626 | ||
627 | for (idx = 1; idx < old_file_h->e_shnum; idx++) | |
628 | { | |
629 | #ifdef DEBUG | |
630 | fprintf (stderr, "Looking for %s - found %s\n", name, | |
631 | section_names + OLD_SECTION_H (idx).sh_name); | |
632 | #endif | |
633 | if (!strcmp (section_names + OLD_SECTION_H (idx).sh_name, | |
634 | name)) | |
635 | break; | |
636 | } | |
637 | if (idx == old_file_h->e_shnum) | |
638 | { | |
639 | if (noerror) | |
640 | return -1; | |
641 | else | |
f4db570c | 642 | fatal ("Can't find %s in %s.\n", name, file_name); |
52da6a59 GM |
643 | } |
644 | ||
645 | return idx; | |
646 | } | |
647 | ||
d427b66a JB |
648 | /* **************************************************************** |
649 | * unexec | |
650 | * | |
651 | * driving logic. | |
652 | * | |
653 | * In ELF, this works by replacing the old .bss section with a new | |
654 | * .data section, and inserting an empty .bss immediately afterwards. | |
655 | * | |
656 | */ | |
657 | void | |
658 | unexec (new_name, old_name, data_start, bss_start, entry_address) | |
659 | char *new_name, *old_name; | |
660 | unsigned data_start, bss_start, entry_address; | |
661 | { | |
d427b66a JB |
662 | int new_file, old_file, new_file_size; |
663 | ||
d9d54213 | 664 | /* Pointers to the base of the image of the two files. */ |
d427b66a JB |
665 | caddr_t old_base, new_base; |
666 | ||
aff37336 SS |
667 | #if MAP_ANON == 0 |
668 | int mmap_fd; | |
669 | #else | |
670 | # define mmap_fd -1 | |
671 | #endif | |
672 | ||
d9d54213 RS |
673 | /* Pointers to the file, program and section headers for the old and |
674 | new files. */ | |
265b2695 RS |
675 | ElfW(Ehdr) *old_file_h, *new_file_h; |
676 | ElfW(Phdr) *old_program_h, *new_program_h; | |
677 | ElfW(Shdr) *old_section_h, *new_section_h; | |
d427b66a | 678 | |
d9d54213 | 679 | /* Point to the section name table in the old file. */ |
d427b66a JB |
680 | char *old_section_names; |
681 | ||
265b2695 RS |
682 | ElfW(Addr) old_bss_addr, new_bss_addr; |
683 | ElfW(Word) old_bss_size, new_data2_size; | |
684 | ElfW(Off) new_data2_offset; | |
685 | ElfW(Addr) new_data2_addr; | |
d427b66a | 686 | |
52da6a59 | 687 | int n, nn; |
825dad89 | 688 | int old_bss_index, old_sbss_index, old_plt_index; |
52da6a59 GM |
689 | int old_data_index, new_data2_index; |
690 | int old_mdebug_index; | |
d427b66a | 691 | struct stat stat_buf; |
86928dfb | 692 | int old_file_size; |
8daaf78b EZ |
693 | #ifdef BROKEN_NOCOMBRELOC |
694 | int unreloc_sections[10], n_unreloc_sections; | |
695 | #endif | |
d427b66a | 696 | |
6fb8339c | 697 | /* Open the old file, allocate a buffer of the right size, and read |
d9d54213 | 698 | in the file contents. */ |
d427b66a JB |
699 | |
700 | old_file = open (old_name, O_RDONLY); | |
701 | ||
702 | if (old_file < 0) | |
703 | fatal ("Can't open %s for reading: errno %d\n", old_name, errno); | |
704 | ||
705 | if (fstat (old_file, &stat_buf) == -1) | |
d7cb42c3 | 706 | fatal ("Can't fstat (%s): errno %d\n", old_name, errno); |
d427b66a | 707 | |
aff37336 SS |
708 | #if MAP_ANON == 0 |
709 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
710 | if (mmap_fd < 0) | |
1ec324f3 | 711 | fatal ("Can't open /dev/zero for reading: errno %d\n", errno, 0); |
aff37336 SS |
712 | #endif |
713 | ||
86928dfb GM |
714 | /* We cannot use malloc here because that may use sbrk. If it does, |
715 | we'd dump our temporary buffers with Emacs, and we'd have to be | |
716 | extra careful to use the correct value of sbrk(0) after | |
717 | allocating all buffers in the code below, which we aren't. */ | |
718 | old_file_size = stat_buf.st_size; | |
719 | old_base = mmap (NULL, old_file_size, PROT_READ | PROT_WRITE, | |
aff37336 SS |
720 | MAP_ANON | MAP_PRIVATE, mmap_fd, 0); |
721 | if (old_base == MAP_FAILED) | |
1ec324f3 | 722 | fatal ("Can't allocate buffer for %s\n", old_name, 0); |
d427b66a | 723 | |
6fb8339c EZ |
724 | if (read (old_file, old_base, stat_buf.st_size) != stat_buf.st_size) |
725 | fatal ("Didn't read all of %s: errno %d\n", old_name, errno); | |
726 | ||
d427b66a JB |
727 | /* Get pointers to headers & section names */ |
728 | ||
265b2695 RS |
729 | old_file_h = (ElfW(Ehdr) *) old_base; |
730 | old_program_h = (ElfW(Phdr) *) ((byte *) old_base + old_file_h->e_phoff); | |
731 | old_section_h = (ElfW(Shdr) *) ((byte *) old_base + old_file_h->e_shoff); | |
d427b66a | 732 | old_section_names = (char *) old_base |
d7cb42c3 | 733 | + OLD_SECTION_H (old_file_h->e_shstrndx).sh_offset; |
d427b66a | 734 | |
52da6a59 GM |
735 | /* Find the mdebug section, if any. */ |
736 | ||
737 | old_mdebug_index = find_section (".mdebug", old_section_names, | |
738 | old_name, old_file_h, old_section_h, 1); | |
739 | ||
d427b66a | 740 | /* Find the old .bss section. Figure out parameters of the new |
d9d54213 | 741 | data2 and bss sections. */ |
d427b66a | 742 | |
52da6a59 GM |
743 | old_bss_index = find_section (".bss", old_section_names, |
744 | old_name, old_file_h, old_section_h, 0); | |
d427b66a | 745 | |
52da6a59 GM |
746 | old_sbss_index = find_section (".sbss", old_section_names, |
747 | old_name, old_file_h, old_section_h, 1); | |
1b963cdd | 748 | if (old_sbss_index != -1) |
825dad89 | 749 | if (OLD_SECTION_H (old_sbss_index).sh_type != SHT_NOBITS) |
1b963cdd | 750 | old_sbss_index = -1; |
52da6a59 | 751 | |
825dad89 AS |
752 | /* PowerPC64 has .plt in the BSS section. */ |
753 | old_plt_index = find_section (".plt", old_section_names, | |
754 | old_name, old_file_h, old_section_h, 1); | |
755 | if (old_plt_index != -1) | |
756 | if (OLD_SECTION_H (old_plt_index).sh_type != SHT_NOBITS) | |
757 | old_plt_index = -1; | |
758 | ||
759 | if (old_sbss_index == -1 && old_plt_index == -1) | |
9240b21d | 760 | { |
52da6a59 GM |
761 | old_bss_addr = OLD_SECTION_H (old_bss_index).sh_addr; |
762 | old_bss_size = OLD_SECTION_H (old_bss_index).sh_size; | |
9240b21d RS |
763 | new_data2_index = old_bss_index; |
764 | } | |
825dad89 AS |
765 | else if (old_plt_index != -1 |
766 | && (old_sbss_index == -1 | |
767 | || (OLD_SECTION_H (old_sbss_index).sh_addr | |
768 | > OLD_SECTION_H (old_plt_index).sh_addr))) | |
769 | { | |
770 | old_bss_addr = OLD_SECTION_H (old_plt_index).sh_addr; | |
771 | old_bss_size = OLD_SECTION_H (old_bss_index).sh_size | |
772 | + OLD_SECTION_H (old_plt_index).sh_size; | |
773 | if (old_sbss_index != -1) | |
774 | old_bss_size += OLD_SECTION_H (old_sbss_index).sh_size; | |
775 | new_data2_index = old_plt_index; | |
776 | } | |
9240b21d RS |
777 | else |
778 | { | |
52da6a59 GM |
779 | old_bss_addr = OLD_SECTION_H (old_sbss_index).sh_addr; |
780 | old_bss_size = OLD_SECTION_H (old_bss_index).sh_size | |
781 | + OLD_SECTION_H (old_sbss_index).sh_size; | |
9240b21d RS |
782 | new_data2_index = old_sbss_index; |
783 | } | |
784 | ||
52da6a59 GM |
785 | /* Find the old .data section. Figure out parameters of |
786 | the new data2 and bss sections. */ | |
787 | ||
788 | old_data_index = find_section (".data", old_section_names, | |
789 | old_name, old_file_h, old_section_h, 0); | |
bc597cc7 | 790 | |
cb1ee811 | 791 | #if defined (emacs) || !defined (DEBUG) |
265b2695 | 792 | new_bss_addr = (ElfW(Addr)) sbrk (0); |
d427b66a JB |
793 | #else |
794 | new_bss_addr = old_bss_addr + old_bss_size + 0x1234; | |
795 | #endif | |
796 | new_data2_addr = old_bss_addr; | |
797 | new_data2_size = new_bss_addr - old_bss_addr; | |
52da6a59 GM |
798 | new_data2_offset = OLD_SECTION_H (old_data_index).sh_offset + |
799 | (new_data2_addr - OLD_SECTION_H (old_data_index).sh_addr); | |
d427b66a JB |
800 | |
801 | #ifdef DEBUG | |
802 | fprintf (stderr, "old_bss_index %d\n", old_bss_index); | |
d283640e KH |
803 | fprintf (stderr, "old_bss_addr %x\n", old_bss_addr); |
804 | fprintf (stderr, "old_bss_size %x\n", old_bss_size); | |
805 | fprintf (stderr, "new_bss_addr %x\n", new_bss_addr); | |
806 | fprintf (stderr, "new_data2_addr %x\n", new_data2_addr); | |
807 | fprintf (stderr, "new_data2_size %x\n", new_data2_size); | |
808 | fprintf (stderr, "new_data2_offset %x\n", new_data2_offset); | |
d427b66a JB |
809 | #endif |
810 | ||
d283640e | 811 | if ((unsigned) new_bss_addr < (unsigned) old_bss_addr + old_bss_size) |
d427b66a JB |
812 | fatal (".bss shrank when undumping???\n", 0, 0); |
813 | ||
6fb8339c | 814 | /* Set the output file to the right size. Allocate a buffer to hold |
d9d54213 RS |
815 | the image of the new file. Set pointers to various interesting |
816 | objects. stat_buf still has old_file data. */ | |
d427b66a JB |
817 | |
818 | new_file = open (new_name, O_RDWR | O_CREAT, 0666); | |
819 | if (new_file < 0) | |
d7cb42c3 | 820 | fatal ("Can't creat (%s): errno %d\n", new_name, errno); |
d427b66a JB |
821 | |
822 | new_file_size = stat_buf.st_size + old_file_h->e_shentsize + new_data2_size; | |
823 | ||
824 | if (ftruncate (new_file, new_file_size)) | |
d7cb42c3 | 825 | fatal ("Can't ftruncate (%s): errno %d\n", new_name, errno); |
d427b66a | 826 | |
86928dfb | 827 | new_base = mmap (NULL, new_file_size, PROT_READ | PROT_WRITE, |
aff37336 SS |
828 | MAP_ANON | MAP_PRIVATE, mmap_fd, 0); |
829 | if (new_base == MAP_FAILED) | |
1ec324f3 | 830 | fatal ("Can't allocate buffer for %s\n", old_name, 0); |
6fb8339c | 831 | |
265b2695 RS |
832 | new_file_h = (ElfW(Ehdr) *) new_base; |
833 | new_program_h = (ElfW(Phdr) *) ((byte *) new_base + old_file_h->e_phoff); | |
834 | new_section_h = (ElfW(Shdr) *) | |
d427b66a JB |
835 | ((byte *) new_base + old_file_h->e_shoff + new_data2_size); |
836 | ||
837 | /* Make our new file, program and section headers as copies of the | |
d9d54213 | 838 | originals. */ |
d427b66a JB |
839 | |
840 | memcpy (new_file_h, old_file_h, old_file_h->e_ehsize); | |
841 | memcpy (new_program_h, old_program_h, | |
842 | old_file_h->e_phnum * old_file_h->e_phentsize); | |
e40c4104 RS |
843 | |
844 | /* Modify the e_shstrndx if necessary. */ | |
845 | PATCH_INDEX (new_file_h->e_shstrndx); | |
d427b66a JB |
846 | |
847 | /* Fix up file header. We'll add one section. Section header is | |
d9d54213 | 848 | further away now. */ |
d427b66a JB |
849 | |
850 | new_file_h->e_shoff += new_data2_size; | |
851 | new_file_h->e_shnum += 1; | |
852 | ||
853 | #ifdef DEBUG | |
d283640e | 854 | fprintf (stderr, "Old section offset %x\n", old_file_h->e_shoff); |
d427b66a | 855 | fprintf (stderr, "Old section count %d\n", old_file_h->e_shnum); |
d283640e | 856 | fprintf (stderr, "New section offset %x\n", new_file_h->e_shoff); |
d427b66a JB |
857 | fprintf (stderr, "New section count %d\n", new_file_h->e_shnum); |
858 | #endif | |
859 | ||
860 | /* Fix up a new program header. Extend the writable data segment so | |
d9d54213 RS |
861 | that the bss area is covered too. Find that segment by looking |
862 | for a segment that ends just before the .bss area. Make sure | |
863 | that no segments are above the new .data2. Put a loop at the end | |
864 | to adjust the offset and address of any segment that is above | |
865 | data2, just in case we decide to allow this later. */ | |
d427b66a JB |
866 | |
867 | for (n = new_file_h->e_phnum - 1; n >= 0; n--) | |
868 | { | |
e40c4104 | 869 | /* Compute maximum of all requirements for alignment of section. */ |
bc597cc7 | 870 | ElfW(Word) alignment = (NEW_PROGRAM_H (n)).p_align; |
e40c4104 RS |
871 | if ((OLD_SECTION_H (old_bss_index)).sh_addralign > alignment) |
872 | alignment = OLD_SECTION_H (old_bss_index).sh_addralign; | |
873 | ||
52da6a59 | 874 | #ifdef __sgi |
bc597cc7 KH |
875 | /* According to r02kar@x4u2.desy.de (Karsten Kuenne) |
876 | and oliva@gnu.org (Alexandre Oliva), on IRIX 5.2, we | |
877 | always get "Program segment above .bss" when dumping | |
878 | when the executable doesn't have an sbss section. */ | |
879 | if (old_sbss_index != -1) | |
52da6a59 | 880 | #endif /* __sgi */ |
9240b21d | 881 | if (NEW_PROGRAM_H (n).p_vaddr + NEW_PROGRAM_H (n).p_filesz |
bc597cc7 KH |
882 | > (old_sbss_index == -1 |
883 | ? old_bss_addr | |
884 | : round_up (old_bss_addr, alignment))) | |
885 | fatal ("Program segment above .bss in %s\n", old_name, 0); | |
d427b66a | 886 | |
d7cb42c3 | 887 | if (NEW_PROGRAM_H (n).p_type == PT_LOAD |
e40c4104 RS |
888 | && (round_up ((NEW_PROGRAM_H (n)).p_vaddr |
889 | + (NEW_PROGRAM_H (n)).p_filesz, | |
890 | alignment) | |
891 | == round_up (old_bss_addr, alignment))) | |
d427b66a JB |
892 | break; |
893 | } | |
894 | if (n < 0) | |
895 | fatal ("Couldn't find segment next to .bss in %s\n", old_name, 0); | |
896 | ||
c1937d6a AS |
897 | /* Make sure that the size includes any padding before the old .bss |
898 | section. */ | |
899 | NEW_PROGRAM_H (n).p_filesz = new_bss_addr - NEW_PROGRAM_H (n).p_vaddr; | |
d7cb42c3 | 900 | NEW_PROGRAM_H (n).p_memsz = NEW_PROGRAM_H (n).p_filesz; |
d427b66a JB |
901 | |
902 | #if 0 /* Maybe allow section after data2 - does this ever happen? */ | |
903 | for (n = new_file_h->e_phnum - 1; n >= 0; n--) | |
904 | { | |
d7cb42c3 RS |
905 | if (NEW_PROGRAM_H (n).p_vaddr |
906 | && NEW_PROGRAM_H (n).p_vaddr >= new_data2_addr) | |
907 | NEW_PROGRAM_H (n).p_vaddr += new_data2_size - old_bss_size; | |
d427b66a | 908 | |
d7cb42c3 RS |
909 | if (NEW_PROGRAM_H (n).p_offset >= new_data2_offset) |
910 | NEW_PROGRAM_H (n).p_offset += new_data2_size; | |
d427b66a JB |
911 | } |
912 | #endif | |
913 | ||
914 | /* Fix up section headers based on new .data2 section. Any section | |
d9d54213 RS |
915 | whose offset or virtual address is after the new .data2 section |
916 | gets its value adjusted. .bss size becomes zero and new address | |
917 | is set. data2 section header gets added by copying the existing | |
918 | .data header and modifying the offset, address and size. */ | |
d7cb42c3 | 919 | for (old_data_index = 1; old_data_index < (int) old_file_h->e_shnum; |
d427b66a | 920 | old_data_index++) |
d7cb42c3 | 921 | if (!strcmp (old_section_names + OLD_SECTION_H (old_data_index).sh_name, |
d427b66a JB |
922 | ".data")) |
923 | break; | |
924 | if (old_data_index == old_file_h->e_shnum) | |
925 | fatal ("Can't find .data in %s.\n", old_name, 0); | |
926 | ||
994a65f3 | 927 | /* Walk through all section headers, insert the new data2 section right |
e40c4104 | 928 | before the new bss section. */ |
d7cb42c3 | 929 | for (n = 1, nn = 1; n < (int) old_file_h->e_shnum; n++, nn++) |
d427b66a JB |
930 | { |
931 | caddr_t src; | |
9240b21d RS |
932 | /* If it is (s)bss section, insert the new data2 section before it. */ |
933 | /* new_data2_index is the index of either old_sbss or old_bss, that was | |
934 | chosen as a section for new_data2. */ | |
bc597cc7 | 935 | if (n == new_data2_index) |
e40c4104 RS |
936 | { |
937 | /* Steal the data section header for this data2 section. */ | |
d7cb42c3 | 938 | memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (old_data_index), |
e40c4104 | 939 | new_file_h->e_shentsize); |
994a65f3 | 940 | |
d7cb42c3 RS |
941 | NEW_SECTION_H (nn).sh_addr = new_data2_addr; |
942 | NEW_SECTION_H (nn).sh_offset = new_data2_offset; | |
943 | NEW_SECTION_H (nn).sh_size = new_data2_size; | |
e40c4104 RS |
944 | /* Use the bss section's alignment. This will assure that the |
945 | new data2 section always be placed in the same spot as the old | |
946 | bss section by any other application. */ | |
d7cb42c3 | 947 | NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (n).sh_addralign; |
e40c4104 RS |
948 | |
949 | /* Now copy over what we have in the memory now. */ | |
994a65f3 RM |
950 | memcpy (NEW_SECTION_H (nn).sh_offset + new_base, |
951 | (caddr_t) OLD_SECTION_H (n).sh_addr, | |
e40c4104 RS |
952 | new_data2_size); |
953 | nn++; | |
954 | } | |
994a65f3 RM |
955 | |
956 | memcpy (&NEW_SECTION_H (nn), &OLD_SECTION_H (n), | |
e40c4104 | 957 | old_file_h->e_shentsize); |
7da3d06f | 958 | |
9240b21d | 959 | if (n == old_bss_index |
9240b21d RS |
960 | /* The new bss and sbss section's size is zero, and its file offset |
961 | and virtual address should be off by NEW_DATA2_SIZE. */ | |
825dad89 | 962 | || n == old_sbss_index || n == old_plt_index |
9240b21d | 963 | ) |
e40c4104 | 964 | { |
bc597cc7 KH |
965 | /* NN should be `old_s?bss_index + 1' at this point. */ |
966 | NEW_SECTION_H (nn).sh_offset = | |
967 | NEW_SECTION_H (new_data2_index).sh_offset + new_data2_size; | |
968 | NEW_SECTION_H (nn).sh_addr = | |
969 | NEW_SECTION_H (new_data2_index).sh_addr + new_data2_size; | |
e40c4104 | 970 | /* Let the new bss section address alignment be the same as the |
994a65f3 | 971 | section address alignment followed the old bss section, so |
e40c4104 | 972 | this section will be placed in exactly the same place. */ |
d7cb42c3 RS |
973 | NEW_SECTION_H (nn).sh_addralign = OLD_SECTION_H (nn).sh_addralign; |
974 | NEW_SECTION_H (nn).sh_size = 0; | |
e40c4104 | 975 | } |
85b2e0ee RS |
976 | else |
977 | { | |
ad537856 RS |
978 | /* Any section that was originally placed after the .bss |
979 | section should now be off by NEW_DATA2_SIZE. If a | |
980 | section overlaps the .bss section, consider it to be | |
981 | placed after the .bss section. Overlap can occur if the | |
982 | section just before .bss has less-strict alignment; this | |
983 | was observed between .symtab and .bss on Solaris 2.5.1 | |
984 | (sparc) with GCC snapshot 960602. */ | |
ea083293 RS |
985 | #ifdef SOLARIS_POWERPC |
986 | /* On PPC Reference Platform running Solaris 2.5.1 | |
987 | the plt section is also of type NOBI like the bss section. | |
988 | (not really stored) and therefore sections after the bss | |
989 | section start at the plt offset. The plt section is always | |
990 | the one just before the bss section. | |
991 | It would be better to put the new data section before | |
992 | the .plt section, or use libelf instead. | |
993 | Erik Deumens, deumens@qtp.ufl.edu. */ | |
994 | if (NEW_SECTION_H (nn).sh_offset | |
995 | >= OLD_SECTION_H (old_bss_index-1).sh_offset) | |
996 | NEW_SECTION_H (nn).sh_offset += new_data2_size; | |
997 | #else | |
ad537856 RS |
998 | if (NEW_SECTION_H (nn).sh_offset + NEW_SECTION_H (nn).sh_size |
999 | > new_data2_offset) | |
85b2e0ee | 1000 | NEW_SECTION_H (nn).sh_offset += new_data2_size; |
ea083293 | 1001 | #endif |
85b2e0ee RS |
1002 | /* Any section that was originally placed after the section |
1003 | header table should now be off by the size of one section | |
1004 | header table entry. */ | |
1005 | if (NEW_SECTION_H (nn).sh_offset > new_file_h->e_shoff) | |
1006 | NEW_SECTION_H (nn).sh_offset += new_file_h->e_shentsize; | |
1007 | } | |
1008 | ||
e40c4104 | 1009 | /* If any section hdr refers to the section after the new .data |
994a65f3 | 1010 | section, make it refer to next one because we have inserted |
8917361f | 1011 | a new section in between. */ |
994a65f3 | 1012 | |
d7cb42c3 | 1013 | PATCH_INDEX (NEW_SECTION_H (nn).sh_link); |
8917361f RS |
1014 | /* For symbol tables, info is a symbol table index, |
1015 | so don't change it. */ | |
1016 | if (NEW_SECTION_H (nn).sh_type != SHT_SYMTAB | |
1017 | && NEW_SECTION_H (nn).sh_type != SHT_DYNSYM) | |
1018 | PATCH_INDEX (NEW_SECTION_H (nn).sh_info); | |
7da3d06f | 1019 | |
1b963cdd DL |
1020 | if (old_sbss_index != -1) |
1021 | if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".sbss")) | |
1022 | { | |
7da3d06f | 1023 | NEW_SECTION_H (nn).sh_offset = |
1b963cdd DL |
1024 | round_up (NEW_SECTION_H (nn).sh_offset, |
1025 | NEW_SECTION_H (nn).sh_addralign); | |
1026 | NEW_SECTION_H (nn).sh_type = SHT_PROGBITS; | |
1027 | } | |
8917361f RS |
1028 | |
1029 | /* Now, start to copy the content of sections. */ | |
d7cb42c3 RS |
1030 | if (NEW_SECTION_H (nn).sh_type == SHT_NULL |
1031 | || NEW_SECTION_H (nn).sh_type == SHT_NOBITS) | |
d427b66a | 1032 | continue; |
994a65f3 | 1033 | |
e40c4104 | 1034 | /* Write out the sections. .data and .data1 (and data2, called |
8917361f RS |
1035 | ".data" in the strings table) get copied from the current process |
1036 | instead of the old file. */ | |
d7cb42c3 | 1037 | if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data") |
9240b21d RS |
1038 | || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), |
1039 | ".sdata") | |
1040 | || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), | |
1041 | ".lit4") | |
1042 | || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), | |
1043 | ".lit8") | |
d4e3d7f2 RS |
1044 | /* The conditional bit below was in Oliva's original code |
1045 | (1999-08-25) and seems to have been dropped by mistake | |
1046 | subsequently. It prevents a crash at startup under X in | |
7da3d06f DL |
1047 | `IRIX64 6.5 6.5.17m', whether compiled on that relase or |
1048 | an earlier one. It causes no trouble on the other ELF | |
1049 | platforms I could test (Irix 6.5.15m, Solaris 8, Debian | |
1050 | Potato x86, Debian Woody SPARC); however, it's reported | |
1051 | to cause crashes under some version of GNU/Linux. It's | |
1052 | not yet clear what's changed in that Irix version to | |
1053 | cause the problem, or why the fix sometimes fails under | |
1054 | GNU/Linux. There's probably no good reason to have | |
1055 | something Irix-specific here, but this will have to do | |
1056 | for now. IRIX6_5 is the most specific macro we have to | |
1057 | test. -- fx 2002-10-01 | |
1058 | ||
1059 | The issue _looks_ as though it's gone away on 6.5.18m, | |
1060 | but maybe it's still lurking, to be triggered by some | |
1061 | change in the binary. It appears to concern the dynamic | |
1062 | loader, but I never got anywhere with an SGI support call | |
1063 | seeking clues. -- fx 2002-11-29. */ | |
d4e3d7f2 RS |
1064 | #ifdef IRIX6_5 |
1065 | || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), | |
1066 | ".got") | |
1067 | #endif | |
bc597cc7 KH |
1068 | || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), |
1069 | ".sdata1") | |
d7cb42c3 | 1070 | || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), |
1b963cdd | 1071 | ".data1") |
6108b49c | 1072 | || !strcmp ((old_section_names + NEW_SECTION_H (n).sh_name), |
1b963cdd | 1073 | ".sbss")) |
d7cb42c3 | 1074 | src = (caddr_t) OLD_SECTION_H (n).sh_addr; |
d427b66a | 1075 | else |
d7cb42c3 | 1076 | src = old_base + OLD_SECTION_H (n).sh_offset; |
994a65f3 | 1077 | |
d7cb42c3 RS |
1078 | memcpy (NEW_SECTION_H (nn).sh_offset + new_base, src, |
1079 | NEW_SECTION_H (nn).sh_size); | |
e40c4104 | 1080 | |
265b2695 RS |
1081 | #ifdef __alpha__ |
1082 | /* Update Alpha COFF symbol table: */ | |
1083 | if (strcmp (old_section_names + OLD_SECTION_H (n).sh_name, ".mdebug") | |
1084 | == 0) | |
1085 | { | |
1086 | pHDRR symhdr = (pHDRR) (NEW_SECTION_H (nn).sh_offset + new_base); | |
1087 | ||
1088 | symhdr->cbLineOffset += new_data2_size; | |
1089 | symhdr->cbDnOffset += new_data2_size; | |
1090 | symhdr->cbPdOffset += new_data2_size; | |
1091 | symhdr->cbSymOffset += new_data2_size; | |
1092 | symhdr->cbOptOffset += new_data2_size; | |
1093 | symhdr->cbAuxOffset += new_data2_size; | |
1094 | symhdr->cbSsOffset += new_data2_size; | |
1095 | symhdr->cbSsExtOffset += new_data2_size; | |
1096 | symhdr->cbFdOffset += new_data2_size; | |
1097 | symhdr->cbRfdOffset += new_data2_size; | |
1098 | symhdr->cbExtOffset += new_data2_size; | |
1099 | } | |
1100 | #endif /* __alpha__ */ | |
1101 | ||
9240b21d | 1102 | #if defined (__sony_news) && defined (_SYSTYPE_SYSV) |
52da6a59 | 1103 | if (NEW_SECTION_H (nn).sh_type == SHT_MIPS_DEBUG |
7da3d06f | 1104 | && old_mdebug_index != -1) |
9240b21d | 1105 | { |
7da3d06f | 1106 | int diff = NEW_SECTION_H(nn).sh_offset |
1ec324f3 | 1107 | - OLD_SECTION_H(old_mdebug_index).sh_offset; |
9240b21d RS |
1108 | HDRR *phdr = (HDRR *)(NEW_SECTION_H (nn).sh_offset + new_base); |
1109 | ||
1110 | if (diff) | |
1111 | { | |
1112 | phdr->cbLineOffset += diff; | |
1113 | phdr->cbDnOffset += diff; | |
1114 | phdr->cbPdOffset += diff; | |
1115 | phdr->cbSymOffset += diff; | |
1116 | phdr->cbOptOffset += diff; | |
1117 | phdr->cbAuxOffset += diff; | |
1118 | phdr->cbSsOffset += diff; | |
1119 | phdr->cbSsExtOffset += diff; | |
1120 | phdr->cbFdOffset += diff; | |
1121 | phdr->cbRfdOffset += diff; | |
1122 | phdr->cbExtOffset += diff; | |
1123 | } | |
1124 | } | |
1125 | #endif /* __sony_news && _SYSTYPE_SYSV */ | |
bc597cc7 KH |
1126 | |
1127 | #if __sgi | |
7da3d06f | 1128 | /* Adjust the HDRR offsets in .mdebug and copy the |
bc597cc7 KH |
1129 | line data if it's in its usual 'hole' in the object. |
1130 | Makes the new file debuggable with dbx. | |
1131 | patches up two problems: the absolute file offsets | |
1132 | in the HDRR record of .mdebug (see /usr/include/syms.h), and | |
1133 | the ld bug that gets the line table in a hole in the | |
1134 | elf file rather than in the .mdebug section proper. | |
1135 | David Anderson. davea@sgi.com Jan 16,1994. */ | |
1136 | if (n == old_mdebug_index) | |
1137 | { | |
1138 | #define MDEBUGADJUST(__ct,__fileaddr) \ | |
1139 | if (n_phdrr->__ct > 0) \ | |
1140 | { \ | |
1141 | n_phdrr->__fileaddr += movement; \ | |
1142 | } | |
1143 | ||
1144 | HDRR * o_phdrr = (HDRR *)((byte *)old_base + OLD_SECTION_H (n).sh_offset); | |
1145 | HDRR * n_phdrr = (HDRR *)((byte *)new_base + NEW_SECTION_H (nn).sh_offset); | |
1146 | unsigned movement = new_data2_size; | |
1147 | ||
1148 | MDEBUGADJUST (idnMax, cbDnOffset); | |
1149 | MDEBUGADJUST (ipdMax, cbPdOffset); | |
1150 | MDEBUGADJUST (isymMax, cbSymOffset); | |
1151 | MDEBUGADJUST (ioptMax, cbOptOffset); | |
1152 | MDEBUGADJUST (iauxMax, cbAuxOffset); | |
1153 | MDEBUGADJUST (issMax, cbSsOffset); | |
1154 | MDEBUGADJUST (issExtMax, cbSsExtOffset); | |
1155 | MDEBUGADJUST (ifdMax, cbFdOffset); | |
1156 | MDEBUGADJUST (crfd, cbRfdOffset); | |
1157 | MDEBUGADJUST (iextMax, cbExtOffset); | |
1158 | /* The Line Section, being possible off in a hole of the object, | |
1159 | requires special handling. */ | |
1160 | if (n_phdrr->cbLine > 0) | |
1161 | { | |
1162 | if (o_phdrr->cbLineOffset > (OLD_SECTION_H (n).sh_offset | |
1163 | + OLD_SECTION_H (n).sh_size)) | |
1164 | { | |
1165 | /* line data is in a hole in elf. do special copy and adjust | |
1166 | for this ld mistake. | |
1167 | */ | |
1168 | n_phdrr->cbLineOffset += movement; | |
1169 | ||
1170 | memcpy (n_phdrr->cbLineOffset + new_base, | |
1171 | o_phdrr->cbLineOffset + old_base, n_phdrr->cbLine); | |
1172 | } | |
1173 | else | |
1174 | { | |
1175 | /* somehow line data is in .mdebug as it is supposed to be. */ | |
1176 | MDEBUGADJUST (cbLine, cbLineOffset); | |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | #endif /* __sgi */ | |
1181 | ||
8917361f | 1182 | /* If it is the symbol table, its st_shndx field needs to be patched. */ |
d7cb42c3 RS |
1183 | if (NEW_SECTION_H (nn).sh_type == SHT_SYMTAB |
1184 | || NEW_SECTION_H (nn).sh_type == SHT_DYNSYM) | |
e40c4104 | 1185 | { |
265b2695 | 1186 | ElfW(Shdr) *spt = &NEW_SECTION_H (nn); |
e40c4104 | 1187 | unsigned int num = spt->sh_size / spt->sh_entsize; |
265b2695 | 1188 | ElfW(Sym) * sym = (ElfW(Sym) *) (NEW_SECTION_H (nn).sh_offset + |
e40c4104 RS |
1189 | new_base); |
1190 | for (; num--; sym++) | |
1191 | { | |
1192 | if ((sym->st_shndx == SHN_UNDEF) | |
1193 | || (sym->st_shndx == SHN_ABS) | |
1194 | || (sym->st_shndx == SHN_COMMON)) | |
1195 | continue; | |
994a65f3 | 1196 | |
d7cb42c3 | 1197 | PATCH_INDEX (sym->st_shndx); |
e40c4104 RS |
1198 | } |
1199 | } | |
d427b66a JB |
1200 | } |
1201 | ||
8917361f | 1202 | /* Update the symbol values of _edata and _end. */ |
8bf761ce RS |
1203 | for (n = new_file_h->e_shnum - 1; n; n--) |
1204 | { | |
1205 | byte *symnames; | |
265b2695 | 1206 | ElfW(Sym) *symp, *symendp; |
8bf761ce RS |
1207 | |
1208 | if (NEW_SECTION_H (n).sh_type != SHT_DYNSYM | |
1209 | && NEW_SECTION_H (n).sh_type != SHT_SYMTAB) | |
1210 | continue; | |
1211 | ||
8c1e9afe KH |
1212 | symnames = ((byte *) new_base |
1213 | + NEW_SECTION_H (NEW_SECTION_H (n).sh_link).sh_offset); | |
265b2695 RS |
1214 | symp = (ElfW(Sym) *) (NEW_SECTION_H (n).sh_offset + new_base); |
1215 | symendp = (ElfW(Sym) *) ((byte *)symp + NEW_SECTION_H (n).sh_size); | |
8bf761ce RS |
1216 | |
1217 | for (; symp < symendp; symp ++) | |
1218 | if (strcmp ((char *) (symnames + symp->st_name), "_end") == 0 | |
2e1ddb87 RS |
1219 | || strcmp ((char *) (symnames + symp->st_name), "end") == 0 |
1220 | || strcmp ((char *) (symnames + symp->st_name), "_edata") == 0 | |
1221 | || strcmp ((char *) (symnames + symp->st_name), "edata") == 0) | |
8bf761ce RS |
1222 | memcpy (&symp->st_value, &new_bss_addr, sizeof (new_bss_addr)); |
1223 | } | |
1224 | ||
48240339 KH |
1225 | /* This loop seeks out relocation sections for the data section, so |
1226 | that it can undo relocations performed by the runtime linker. */ | |
8daaf78b | 1227 | #ifndef BROKEN_NOCOMBRELOC |
48240339 KH |
1228 | for (n = new_file_h->e_shnum - 1; n; n--) |
1229 | { | |
265b2695 | 1230 | ElfW(Shdr) section = NEW_SECTION_H (n); |
642ffd98 RS |
1231 | |
1232 | /* Cause a compilation error if anyone uses n instead of nn below. */ | |
1233 | struct {int a;} n; | |
1e7b70b2 | 1234 | (void)n.a; /* Prevent `unused variable' warnings. */ |
642ffd98 | 1235 | |
7da3d06f | 1236 | switch (section.sh_type) |
642ffd98 RS |
1237 | { |
1238 | default: | |
1239 | break; | |
1240 | case SHT_REL: | |
1241 | case SHT_RELA: | |
1242 | /* This code handles two different size structs, but there should | |
1243 | be no harm in that provided that r_offset is always the first | |
1244 | member. */ | |
1245 | nn = section.sh_info; | |
1246 | if (!strcmp (old_section_names + NEW_SECTION_H (nn).sh_name, ".data") | |
1247 | || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name), | |
1248 | ".sdata") | |
1249 | || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name), | |
1250 | ".lit4") | |
1251 | || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name), | |
1252 | ".lit8") | |
d4e3d7f2 RS |
1253 | #ifdef IRIX6_5 /* see above */ |
1254 | || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name), | |
1255 | ".got") | |
1256 | #endif | |
642ffd98 RS |
1257 | || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name), |
1258 | ".sdata1") | |
1259 | || !strcmp ((old_section_names + NEW_SECTION_H (nn).sh_name), | |
1260 | ".data1")) | |
1261 | { | |
1262 | ElfW(Addr) offset = (NEW_SECTION_H (nn).sh_addr | |
1263 | - NEW_SECTION_H (nn).sh_offset); | |
1264 | caddr_t reloc = old_base + section.sh_offset, end; | |
1265 | for (end = reloc + section.sh_size; reloc < end; | |
1266 | reloc += section.sh_entsize) | |
1267 | { | |
1268 | ElfW(Addr) addr = ((ElfW(Rel) *) reloc)->r_offset - offset; | |
265b2695 | 1269 | #ifdef __alpha__ |
642ffd98 RS |
1270 | /* The Alpha ELF binutils currently have a bug that |
1271 | sometimes results in relocs that contain all | |
1272 | zeroes. Work around this for now... */ | |
1273 | if (((ElfW(Rel) *) reloc)->r_offset == 0) | |
265b2695 RS |
1274 | continue; |
1275 | #endif | |
642ffd98 RS |
1276 | memcpy (new_base + addr, old_base + addr, sizeof(ElfW(Addr))); |
1277 | } | |
1278 | } | |
1279 | break; | |
1280 | } | |
48240339 | 1281 | } |
8daaf78b EZ |
1282 | #else /* BROKEN_NOCOMBRELOC */ |
1283 | for (n = 1, n_unreloc_sections = 0; n < new_file_h->e_shnum; n++) | |
1284 | if (!strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data") | |
1285 | || !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".sdata") | |
1286 | || !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".lit4") | |
1287 | || !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".lit8") | |
1288 | #ifdef IRIX6_5 /* see above */ | |
1289 | || !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".got") | |
1290 | #endif | |
1291 | || !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".sdata1") | |
1292 | || !strcmp (old_section_names + NEW_SECTION_H (n).sh_name, ".data1")) | |
1293 | { | |
1294 | assert (n_unreloc_sections | |
1295 | < (sizeof (unreloc_sections) / sizeof (unreloc_sections[0]))); | |
1296 | unreloc_sections[n_unreloc_sections++] = n; | |
1297 | #ifdef DEBUG | |
1298 | fprintf (stderr, "section %d: %s\n", n, | |
1299 | old_section_names + NEW_SECTION_H (n).sh_name); | |
1300 | #endif | |
1301 | } | |
1302 | ||
1303 | for (n = new_file_h->e_shnum - 1; n; n--) | |
1304 | { | |
1305 | ElfW(Shdr) section = NEW_SECTION_H (n); | |
1306 | caddr_t reloc, end; | |
1307 | ElfW(Addr) addr, offset; | |
1308 | int target; | |
1309 | ||
1310 | switch (section.sh_type) | |
1311 | { | |
1312 | default: | |
1313 | break; | |
1314 | case SHT_REL: | |
1315 | case SHT_RELA: | |
1316 | /* This code handles two different size structs, but there should | |
1317 | be no harm in that provided that r_offset is always the first | |
1318 | member. */ | |
1319 | for (reloc = old_base + section.sh_offset, | |
1320 | end = reloc + section.sh_size; | |
1321 | reloc < end; | |
1322 | reloc += section.sh_entsize) | |
1323 | { | |
1324 | addr = ((ElfW(Rel) *) reloc)->r_offset; | |
1325 | #ifdef __alpha__ | |
1326 | /* The Alpha ELF binutils currently have a bug that | |
1327 | sometimes results in relocs that contain all | |
1328 | zeroes. Work around this for now... */ | |
1329 | if (addr == 0) | |
1330 | continue; | |
1331 | #endif | |
1332 | for (nn = 0; nn < n_unreloc_sections; nn++) | |
1333 | { | |
1334 | target = unreloc_sections[nn]; | |
1335 | if (NEW_SECTION_H (target).sh_addr <= addr | |
1336 | && addr < (NEW_SECTION_H (target).sh_addr + | |
1337 | NEW_SECTION_H (target).sh_size)) | |
1338 | { | |
1339 | offset = (NEW_SECTION_H (target).sh_addr - | |
1340 | NEW_SECTION_H (target).sh_offset); | |
1341 | memcpy (new_base + addr - offset, | |
1342 | old_base + addr - offset, | |
1343 | sizeof (ElfW(Addr))); | |
1344 | #ifdef DEBUG | |
1345 | fprintf (stderr, "unrelocate: [%08lx] <= %08lx\n", | |
1346 | (long) addr, | |
1347 | (long) *((long *) (new_base + addr - offset))); | |
1348 | #endif | |
1349 | break; | |
1350 | } | |
1351 | } | |
1352 | } | |
1353 | break; | |
1354 | } | |
1355 | } | |
1356 | #endif /* BROKEN_NOCOMBRELOC */ | |
48240339 | 1357 | |
d9d54213 | 1358 | /* Write out new_file, and free the buffers. */ |
04f903c0 KH |
1359 | |
1360 | if (write (new_file, new_base, new_file_size) != new_file_size) | |
1ec324f3 EZ |
1361 | #ifndef emacs |
1362 | fatal ("Didn't write %d bytes: errno %d\n", | |
1363 | new_file_size, errno); | |
1364 | #else | |
7da3d06f | 1365 | fatal ("Didn't write %d bytes to %s: errno %d\n", |
6fb8339c | 1366 | new_file_size, new_base, errno); |
1ec324f3 | 1367 | #endif |
86928dfb GM |
1368 | munmap (old_base, old_file_size); |
1369 | munmap (new_base, new_file_size); | |
6fb8339c | 1370 | |
d9d54213 | 1371 | /* Close the files and make the new file executable. */ |
d427b66a | 1372 | |
aff37336 SS |
1373 | #if MAP_ANON == 0 |
1374 | close (mmap_fd); | |
1375 | #endif | |
1376 | ||
d427b66a | 1377 | if (close (old_file)) |
d7cb42c3 | 1378 | fatal ("Can't close (%s): errno %d\n", old_name, errno); |
d427b66a | 1379 | |
d9d54213 RS |
1380 | if (close (new_file)) |
1381 | fatal ("Can't close (%s): errno %d\n", new_name, errno); | |
d427b66a JB |
1382 | |
1383 | if (stat (new_name, &stat_buf) == -1) | |
d7cb42c3 | 1384 | fatal ("Can't stat (%s): errno %d\n", new_name, errno); |
d427b66a JB |
1385 | |
1386 | n = umask (777); | |
1387 | umask (n); | |
1388 | stat_buf.st_mode |= 0111 & ~n; | |
1389 | if (chmod (new_name, stat_buf.st_mode) == -1) | |
d7cb42c3 | 1390 | fatal ("Can't chmod (%s): errno %d\n", new_name, errno); |
d427b66a | 1391 | } |
ab5796a9 MB |
1392 | |
1393 | /* arch-tag: e02e1512-95e2-4ef0-bba7-b6bce658f1e3 | |
1394 | (do not change this comment) */ |