Commit | Line | Data |
---|---|---|
f1913a26 | 1 | /* Unexec for Siemens machines running Sinix (modified SVR4). |
429ab54e | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1990, 1992, 1993, 1994, 1995, 2001, |
8cabe764 | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
429ab54e | 4 | Free Software Foundation, Inc. |
f1913a26 | 5 | |
3b7ad313 | 6 | This file is part of GNU Emacs. |
f1913a26 | 7 | |
3b7ad313 EN |
8 | GNU Emacs is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
684d6f5b | 10 | the Free Software Foundation; either version 3, or (at your option) |
3b7ad313 | 11 | any later version. |
f1913a26 | 12 | |
3b7ad313 EN |
13 | GNU Emacs is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. | |
f1913a26 RS |
22 | |
23 | In other words, you are welcome to use, share and improve this program. | |
24 | You are forbidden to forbid anyone else to use, share and improve | |
25 | what you give them. Help stamp out software-hoarding! */ | |
26 | ||
f1913a26 RS |
27 | /* |
28 | * unexec.c - Convert a running program into an a.out file. | |
29 | * | |
30 | * Author: Spencer W. Thomas | |
31 | * Computer Science Dept. | |
32 | * University of Utah | |
33 | * Date: Tue Mar 2 1982 | |
34 | * Modified heavily since then. | |
35 | * | |
36 | * Synopsis: | |
37 | * unexec (new_name, a_name, data_start, bss_start, entry_address) | |
38 | * char *new_name, *a_name; | |
39 | * unsigned data_start, bss_start, entry_address; | |
40 | * | |
41 | * Takes a snapshot of the program and makes an a.out format file in the | |
42 | * file named by the string argument new_name. | |
43 | * If a_name is non-NULL, the symbol table will be taken from the given file. | |
44 | * On some machines, an existing a_name file is required. | |
45 | * | |
46 | * The boundaries within the a.out file may be adjusted with the data_start | |
47 | * and bss_start arguments. Either or both may be given as 0 for defaults. | |
48 | * | |
49 | * Data_start gives the boundary between the text segment and the data | |
50 | * segment of the program. The text segment can contain shared, read-only | |
51 | * program code and literal data, while the data segment is always unshared | |
52 | * and unprotected. Data_start gives the lowest unprotected address. | |
53 | * The value you specify may be rounded down to a suitable boundary | |
54 | * as required by the machine you are using. | |
55 | * | |
56 | * Specifying zero for data_start means the boundary between text and data | |
57 | * should not be the same as when the program was loaded. | |
58 | * If NO_REMAP is defined, the argument data_start is ignored and the | |
59 | * segment boundaries are never changed. | |
60 | * | |
61 | * Bss_start indicates how much of the data segment is to be saved in the | |
62 | * a.out file and restored when the program is executed. It gives the lowest | |
63 | * unsaved address, and is rounded up to a page boundary. The default when 0 | |
64 | * is given assumes that the entire data segment is to be stored, including | |
65 | * the previous data and bss as well as any additional storage allocated with | |
66 | * break (2). | |
67 | * | |
68 | * The new file is set up to start at entry_address. | |
69 | * | |
70 | * If you make improvements I'd like to get them too. | |
71 | * harpo!utah-cs!thomas, thomas@Utah-20 | |
72 | * | |
73 | */ | |
74 | ||
75 | /* Even more heavily modified by james@bigtex.cactus.org of Dell Computer Co. | |
76 | * ELF support added. | |
77 | * | |
78 | * Basic theory: the data space of the running process needs to be | |
79 | * dumped to the output file. Normally we would just enlarge the size | |
80 | * of .data, scooting everything down. But we can't do that in ELF, | |
81 | * because there is often something between the .data space and the | |
82 | * .bss space. | |
83 | * | |
84 | * In the temacs dump below, notice that the Global Offset Table | |
85 | * (.got) and the Dynamic link data (.dynamic) come between .data1 and | |
86 | * .bss. It does not work to overlap .data with these fields. | |
87 | * | |
88 | * The solution is to create a new .data segment. This segment is | |
89 | * filled with data from the current process. Since the contents of | |
90 | * various sections refer to sections by index, the new .data segment | |
91 | * is made the last in the table to avoid changing any existing index. | |
92 | */ | |
93 | ||
177c0ea7 JB |
94 | /* Modified by wtien@urbana.mcd.mot.com of Motorola Inc. |
95 | * | |
f1913a26 | 96 | * The above mechanism does not work if the unexeced ELF file is being |
177c0ea7 | 97 | * re-layout by other applications (such as `strip'). All the applications |
f1913a26 | 98 | * that re-layout the internal of ELF will layout all sections in ascending |
177c0ea7 JB |
99 | * order of their file offsets. After the re-layout, the data2 section will |
100 | * still be the LAST section in the section header vector, but its file offset | |
f1913a26 | 101 | * is now being pushed far away down, and causes part of it not to be mapped |
177c0ea7 | 102 | * in (ie. not covered by the load segment entry in PHDR vector), therefore |
f1913a26 RS |
103 | * causes the new binary to fail. |
104 | * | |
105 | * The solution is to modify the unexec algorithm to insert the new data2 | |
106 | * section header right before the new bss section header, so their file | |
177c0ea7 JB |
107 | * offsets will be in the ascending order. Since some of the section's (all |
108 | * sections AFTER the bss section) indexes are now changed, we also need to | |
109 | * modify some fields to make them point to the right sections. This is done | |
f1913a26 | 110 | * by macro PATCH_INDEX. All the fields that need to be patched are: |
177c0ea7 | 111 | * |
f1913a26 RS |
112 | * 1. ELF header e_shstrndx field. |
113 | * 2. section header sh_link and sh_info field. | |
114 | * 3. symbol table entry st_shndx field. | |
115 | */ | |
116 | ||
117 | /* | |
118 | * New modifications for Siemens Nixdorf's MIPS-based machines. | |
119 | * Marco.Walther@mch.sni.de | |
b6f8e806 | 120 | * marco@inreach.com |
f1913a26 RS |
121 | * |
122 | * The problem: Before the bss segment we have a so called sbss segment | |
123 | * (small bss) and maybe an sdata segment. These segments | |
124 | * must also be handled correct. | |
125 | * | |
126 | * /home1/marco/emacs/emacs-19.22/src | |
127 | * dump -hv temacs | |
177c0ea7 | 128 | * |
f1913a26 RS |
129 | * temacs: |
130 | * | |
131 | * **** SECTION HEADER TABLE **** | |
132 | * [No] Type Flags Addr Offset Size Name | |
133 | * Link Info Adralgn Entsize | |
134 | * | |
135 | * [1] PBIT -A-- 0x4000f4 0xf4 0x13 .interp | |
177c0ea7 | 136 | * 0 0 0x1 0 |
f1913a26 RS |
137 | * |
138 | * [2] REGI -A-- 0x400108 0x108 0x18 .reginfo | |
177c0ea7 | 139 | * 0 0 0x4 0x18 |
f1913a26 RS |
140 | * |
141 | * [3] DYNM -A-- 0x400120 0x120 0xb8 .dynamic | |
177c0ea7 | 142 | * 6 0 0x4 0x8 |
f1913a26 RS |
143 | * |
144 | * [4] HASH -A-- 0x4001d8 0x1d8 0x8a0 .hash | |
177c0ea7 | 145 | * 5 0 0x4 0x4 |
f1913a26 RS |
146 | * |
147 | * [5] DYNS -A-- 0x400a78 0xa78 0x11f0 .dynsym | |
177c0ea7 | 148 | * 6 2 0x4 0x10 |
f1913a26 RS |
149 | * |
150 | * [6] STRT -A-- 0x401c68 0x1c68 0xbf9 .dynstr | |
177c0ea7 | 151 | * 0 0 0x1 0 |
f1913a26 RS |
152 | * |
153 | * [7] REL -A-- 0x402864 0x2864 0x18 .rel.dyn | |
177c0ea7 | 154 | * 5 14 0x4 0x8 |
f1913a26 RS |
155 | * |
156 | * [8] PBIT -AI- 0x402880 0x2880 0x60 .init | |
177c0ea7 | 157 | * 0 0 0x10 0x1 |
f1913a26 RS |
158 | * |
159 | * [9] PBIT -AI- 0x4028e0 0x28e0 0x1234 .plt | |
177c0ea7 | 160 | * 0 0 0x4 0x4 |
f1913a26 RS |
161 | * |
162 | * [10] PBIT -AI- 0x403b20 0x3b20 0xee400 .text | |
177c0ea7 | 163 | * 0 0 0x20 0x1 |
f1913a26 RS |
164 | * |
165 | * [11] PBIT -AI- 0x4f1f20 0xf1f20 0x60 .fini | |
177c0ea7 | 166 | * 0 0 0x10 0x1 |
f1913a26 RS |
167 | * |
168 | * [12] PBIT -A-- 0x4f1f80 0xf1f80 0xd90 .rdata | |
177c0ea7 | 169 | * 0 0 0x10 0x1 |
f1913a26 RS |
170 | * |
171 | * [13] PBIT -A-- 0x4f2d10 0xf2d10 0x17e0 .rodata | |
177c0ea7 | 172 | * 0 0 0x10 0x1 |
f1913a26 RS |
173 | * |
174 | * [14] PBIT WA-- 0x5344f0 0xf44f0 0x4b3e4 .data <<<<< | |
177c0ea7 | 175 | * 0 0 0x10 0x1 |
f1913a26 RS |
176 | * |
177 | * [15] PBIT WA-G 0x57f8d4 0x13f8d4 0x2a84 .got | |
177c0ea7 | 178 | * 0 0 0x4 0x4 |
f1913a26 RS |
179 | * |
180 | * [16] PBIT WA-G 0x582360 0x142360 0x10 .sdata <<<<< | |
177c0ea7 | 181 | * 0 0 0x10 0x1 |
f1913a26 RS |
182 | * |
183 | * [17] NOBI WA-G 0x582370 0x142370 0xb84 .sbss <<<<< | |
177c0ea7 | 184 | * 0 0 0x4 0 |
f1913a26 RS |
185 | * |
186 | * [18] NOBI WA-- 0x582f00 0x142370 0x27ec0 .bss <<<<< | |
177c0ea7 | 187 | * 0 0 0x10 0x1 |
f1913a26 RS |
188 | * |
189 | * [19] SYMT ---- 0 0x142370 0x10e40 .symtab | |
177c0ea7 | 190 | * 20 1108 0x4 0x10 |
f1913a26 RS |
191 | * |
192 | * [20] STRT ---- 0 0x1531b0 0xed9e .strtab | |
177c0ea7 | 193 | * 0 0 0x1 0 |
f1913a26 RS |
194 | * |
195 | * [21] STRT ---- 0 0x161f4e 0xb5 .shstrtab | |
177c0ea7 | 196 | * 0 0 0x1 0 |
f1913a26 RS |
197 | * |
198 | * [22] PBIT ---- 0 0x162003 0x28e2a .comment | |
177c0ea7 | 199 | * 0 0 0x1 0x1 |
f1913a26 RS |
200 | * |
201 | * [23] PBIT ---- 0 0x18ae2d 0x592 .debug | |
177c0ea7 | 202 | * 0 0 0x1 0 |
f1913a26 RS |
203 | * |
204 | * [24] PBIT ---- 0 0x18b3bf 0x80 .line | |
177c0ea7 | 205 | * 0 0 0x1 0 |
f1913a26 RS |
206 | * |
207 | * [25] MDBG ---- 0 0x18b440 0x60 .mdebug | |
177c0ea7 | 208 | * 0 0 0x4 0 |
f1913a26 RS |
209 | * |
210 | * | |
211 | * dump -hv emacs | |
177c0ea7 | 212 | * |
f1913a26 RS |
213 | * emacs: |
214 | * | |
215 | * **** SECTION HEADER TABLE **** | |
216 | * [No] Type Flags Addr Offset Size Name | |
217 | * Link Info Adralgn Entsize | |
218 | * | |
219 | * [1] PBIT -A-- 0x4000f4 0xf4 0x13 .interp | |
177c0ea7 | 220 | * 0 0 0x1 0 |
f1913a26 RS |
221 | * |
222 | * [2] REGI -A-- 0x400108 0x108 0x18 .reginfo | |
177c0ea7 | 223 | * 0 0 0x4 0x18 |
f1913a26 RS |
224 | * |
225 | * [3] DYNM -A-- 0x400120 0x120 0xb8 .dynamic | |
177c0ea7 | 226 | * 6 0 0x4 0x8 |
f1913a26 RS |
227 | * |
228 | * [4] HASH -A-- 0x4001d8 0x1d8 0x8a0 .hash | |
177c0ea7 | 229 | * 5 0 0x4 0x4 |
f1913a26 RS |
230 | * |
231 | * [5] DYNS -A-- 0x400a78 0xa78 0x11f0 .dynsym | |
177c0ea7 | 232 | * 6 2 0x4 0x10 |
f1913a26 RS |
233 | * |
234 | * [6] STRT -A-- 0x401c68 0x1c68 0xbf9 .dynstr | |
177c0ea7 | 235 | * 0 0 0x1 0 |
f1913a26 RS |
236 | * |
237 | * [7] REL -A-- 0x402864 0x2864 0x18 .rel.dyn | |
177c0ea7 | 238 | * 5 14 0x4 0x8 |
f1913a26 RS |
239 | * |
240 | * [8] PBIT -AI- 0x402880 0x2880 0x60 .init | |
177c0ea7 | 241 | * 0 0 0x10 0x1 |
f1913a26 RS |
242 | * |
243 | * [9] PBIT -AI- 0x4028e0 0x28e0 0x1234 .plt | |
177c0ea7 | 244 | * 0 0 0x4 0x4 |
f1913a26 RS |
245 | * |
246 | * [10] PBIT -AI- 0x403b20 0x3b20 0xee400 .text | |
177c0ea7 | 247 | * 0 0 0x20 0x1 |
f1913a26 RS |
248 | * |
249 | * [11] PBIT -AI- 0x4f1f20 0xf1f20 0x60 .fini | |
177c0ea7 | 250 | * 0 0 0x10 0x1 |
f1913a26 RS |
251 | * |
252 | * [12] PBIT -A-- 0x4f1f80 0xf1f80 0xd90 .rdata | |
177c0ea7 | 253 | * 0 0 0x10 0x1 |
f1913a26 RS |
254 | * |
255 | * [13] PBIT -A-- 0x4f2d10 0xf2d10 0x17e0 .rodata | |
177c0ea7 | 256 | * 0 0 0x10 0x1 |
f1913a26 RS |
257 | * |
258 | * [14] PBIT WA-- 0x5344f0 0xf44f0 0x4b3e4 .data <<<<< | |
177c0ea7 | 259 | * 0 0 0x10 0x1 |
f1913a26 RS |
260 | * |
261 | * [15] PBIT WA-G 0x57f8d4 0x13f8d4 0x2a84 .got | |
177c0ea7 | 262 | * 0 0 0x4 0x4 |
f1913a26 RS |
263 | * |
264 | * [16] PBIT WA-G 0x582360 0x142360 0xb94 .sdata <<<<< | |
177c0ea7 | 265 | * 0 0 0x10 0x1 |
f1913a26 RS |
266 | * |
267 | * [17] PBIT WA-- 0x582f00 0x142f00 0x94100 .data <<<<< | |
177c0ea7 | 268 | * 0 0 0x10 0x1 |
f1913a26 RS |
269 | * |
270 | * [18] NOBI WA-G 0x617000 0x1d7000 0 .sbss <<<<< | |
177c0ea7 | 271 | * 0 0 0x4 0 |
f1913a26 RS |
272 | * |
273 | * [19] NOBI WA-- 0x617000 0x1d7000 0 .bss <<<<< | |
177c0ea7 | 274 | * 0 0 0x4 0x1 |
f1913a26 RS |
275 | * |
276 | * [20] SYMT ---- 0 0x1d7000 0x10e40 .symtab | |
177c0ea7 | 277 | * 21 1109 0x4 0x10 |
f1913a26 RS |
278 | * |
279 | * [21] STRT ---- 0 0x1e7e40 0xed9e .strtab | |
177c0ea7 | 280 | * 0 0 0x1 0 |
f1913a26 RS |
281 | * |
282 | * [22] STRT ---- 0 0x1f6bde 0xb5 .shstrtab | |
177c0ea7 | 283 | * 0 0 0x1 0 |
f1913a26 RS |
284 | * |
285 | * [23] PBIT ---- 0 0x1f6c93 0x28e2a .comment | |
177c0ea7 | 286 | * 0 0 0x1 0x1 |
f1913a26 RS |
287 | * |
288 | * [24] PBIT ---- 0 0x21fabd 0x592 .debug | |
177c0ea7 | 289 | * 0 0 0x1 0 |
f1913a26 RS |
290 | * |
291 | * [25] PBIT ---- 0 0x22004f 0x80 .line | |
177c0ea7 | 292 | * 0 0 0x1 0 |
f1913a26 RS |
293 | * |
294 | * [26] MDBG ---- 0 0x2200d0 0x60 .mdebug | |
177c0ea7 | 295 | * 0 0 0x4 0 |
f1913a26 RS |
296 | * |
297 | */ | |
298 | \f | |
299 | #include <sys/types.h> | |
300 | #include <stdio.h> | |
301 | #include <sys/stat.h> | |
302 | #include <memory.h> | |
303 | #include <string.h> | |
304 | #include <errno.h> | |
305 | #include <unistd.h> | |
306 | #include <fcntl.h> | |
307 | #include <elf.h> | |
308 | #include <sys/mman.h> | |
b6f8e806 GM |
309 | #include <assert.h> |
310 | ||
311 | /* #define DEBUG */ | |
f1913a26 RS |
312 | |
313 | #ifndef emacs | |
314 | #define fatal(a, b, c) fprintf(stderr, a, b, c), exit(1) | |
315 | #else | |
316 | extern void fatal(char *, ...); | |
317 | #endif | |
318 | ||
319 | /* Get the address of a particular section or program header entry, | |
320 | * accounting for the size of the entries. | |
321 | */ | |
322 | ||
323 | #define OLD_SECTION_H(n) \ | |
324 | (*(Elf32_Shdr *) ((byte *) old_section_h + old_file_h->e_shentsize * (n))) | |
325 | #define NEW_SECTION_H(n) \ | |
326 | (*(Elf32_Shdr *) ((byte *) new_section_h + new_file_h->e_shentsize * (n))) | |
327 | #define OLD_PROGRAM_H(n) \ | |
328 | (*(Elf32_Phdr *) ((byte *) old_program_h + old_file_h->e_phentsize * (n))) | |
329 | #define NEW_PROGRAM_H(n) \ | |
330 | (*(Elf32_Phdr *) ((byte *) new_program_h + new_file_h->e_phentsize * (n))) | |
331 | ||
332 | #define PATCH_INDEX(n) \ | |
333 | do { \ | |
334 | if ((n) >= old_sbss_index) \ | |
335 | (n) += 1 + (old_sdata_index ? 0 : 1); } while (0) | |
336 | ||
337 | typedef unsigned char byte; | |
338 | ||
339 | /* Round X up to a multiple of Y. */ | |
340 | ||
341 | int | |
342 | round_up (x, y) | |
343 | int x, y; | |
344 | { | |
345 | int rem = x % y; | |
346 | if (rem == 0) | |
347 | return x; | |
348 | return x - rem + y; | |
349 | } | |
350 | ||
351 | /* **************************************************************** | |
352 | * unexec | |
353 | * | |
354 | * driving logic. | |
355 | * | |
356 | * In ELF, this works by replacing the old .bss section with a new | |
357 | * .data section, and inserting an empty .bss immediately afterwards. | |
358 | * | |
359 | */ | |
360 | void | |
361 | unexec (new_name, old_name, data_start, bss_start, entry_address) | |
362 | char *new_name, *old_name; | |
363 | unsigned data_start, bss_start, entry_address; | |
364 | { | |
365 | extern unsigned int bss_end; | |
366 | int new_file, old_file, new_file_size; | |
367 | ||
368 | /* Pointers to the base of the image of the two files. */ | |
369 | caddr_t old_base, new_base; | |
370 | ||
371 | /* Pointers to the file, program and section headers for the old and new | |
372 | * files. | |
373 | */ | |
374 | Elf32_Ehdr *old_file_h, *new_file_h; | |
375 | Elf32_Phdr *old_program_h, *new_program_h; | |
376 | Elf32_Shdr *old_section_h, *new_section_h; | |
377 | ||
378 | /* Point to the section name table in the old file */ | |
379 | char *old_section_names; | |
380 | ||
381 | Elf32_Addr old_bss_addr, new_bss_addr; | |
382 | Elf32_Addr old_sbss_addr; | |
383 | Elf32_Word old_bss_size, new_data2_size; | |
384 | Elf32_Word old_sbss_size, new_data3_size; | |
385 | Elf32_Off new_data2_offset; | |
386 | Elf32_Off new_data3_offset; | |
387 | Elf32_Addr new_data2_addr; | |
388 | Elf32_Addr new_data3_addr; | |
389 | ||
b6f8e806 GM |
390 | |
391 | Elf32_Addr old_rel_dyn_addr; | |
392 | Elf32_Word old_rel_dyn_size; | |
393 | int old_rel_dyn_index; | |
394 | ||
f1913a26 RS |
395 | Elf32_Word old_sdata_size, new_sdata_size; |
396 | int old_sdata_index = 0; | |
397 | ||
398 | int n, nn, old_data_index, new_data2_align; | |
399 | int old_bss_index; | |
400 | int old_sbss_index; | |
401 | int old_bss_padding; | |
402 | struct stat stat_buf; | |
403 | ||
404 | /* Open the old file & map it into the address space. */ | |
405 | ||
406 | old_file = open (old_name, O_RDONLY); | |
407 | ||
408 | if (old_file < 0) | |
409 | fatal ("Can't open %s for reading: errno %d\n", old_name, errno); | |
410 | ||
411 | if (fstat (old_file, &stat_buf) == -1) | |
412 | fatal ("Can't fstat(%s): errno %d\n", old_name, errno); | |
413 | ||
414 | old_base = mmap (0, stat_buf.st_size, PROT_READ, MAP_SHARED, old_file, 0); | |
415 | ||
416 | if (old_base == (caddr_t) -1) | |
417 | fatal ("Can't mmap(%s): errno %d\n", old_name, errno); | |
418 | ||
419 | #ifdef DEBUG | |
420 | fprintf (stderr, "mmap(%s, %x) -> %x\n", old_name, stat_buf.st_size, | |
421 | old_base); | |
422 | #endif | |
423 | ||
424 | /* Get pointers to headers & section names */ | |
425 | ||
426 | old_file_h = (Elf32_Ehdr *) old_base; | |
427 | old_program_h = (Elf32_Phdr *) ((byte *) old_base + old_file_h->e_phoff); | |
428 | old_section_h = (Elf32_Shdr *) ((byte *) old_base + old_file_h->e_shoff); | |
429 | old_section_names = (char *) old_base | |
430 | + OLD_SECTION_H(old_file_h->e_shstrndx).sh_offset; | |
431 | ||
432 | /* Find the old .sbss section. | |
433 | */ | |
434 | ||
435 | for (old_sbss_index = 1; old_sbss_index < old_file_h->e_shnum; | |
436 | old_sbss_index++) | |
437 | { | |
438 | #ifdef DEBUG | |
439 | fprintf (stderr, "Looking for .sbss - found %s\n", | |
440 | old_section_names + OLD_SECTION_H(old_sbss_index).sh_name); | |
441 | #endif | |
442 | if (!strcmp (old_section_names + OLD_SECTION_H(old_sbss_index).sh_name, | |
443 | ".sbss")) | |
444 | break; | |
445 | } | |
446 | if (old_sbss_index == old_file_h->e_shnum) | |
447 | fatal ("Can't find .sbss in %s.\n", old_name, 0); | |
448 | ||
449 | if (!strcmp(old_section_names + OLD_SECTION_H(old_sbss_index - 1).sh_name, | |
450 | ".sdata")) | |
451 | { | |
452 | old_sdata_index = old_sbss_index - 1; | |
453 | } | |
177c0ea7 | 454 | |
f1913a26 RS |
455 | |
456 | /* Find the old .bss section. | |
457 | */ | |
458 | ||
459 | for (old_bss_index = 1; old_bss_index < old_file_h->e_shnum; old_bss_index++) | |
460 | { | |
461 | #ifdef DEBUG | |
462 | fprintf (stderr, "Looking for .bss - found %s\n", | |
463 | old_section_names + OLD_SECTION_H(old_bss_index).sh_name); | |
464 | #endif | |
465 | if (!strcmp (old_section_names + OLD_SECTION_H(old_bss_index).sh_name, | |
466 | ".bss")) | |
467 | break; | |
468 | } | |
469 | if (old_bss_index == old_file_h->e_shnum) | |
470 | fatal ("Can't find .bss in %s.\n", old_name, 0); | |
471 | ||
472 | if (old_sbss_index != (old_bss_index - 1)) | |
b75dac61 | 473 | fatal (".sbss should come immediately before .bss in %s.\n", old_name, 0); |
f1913a26 | 474 | |
b6f8e806 GM |
475 | /* Find the old .rel.dyn section. |
476 | */ | |
477 | ||
478 | for (old_rel_dyn_index = 1; old_rel_dyn_index < old_file_h->e_shnum; | |
479 | old_rel_dyn_index++) | |
480 | { | |
481 | #ifdef DEBUG | |
482 | fprintf (stderr, "Looking for .rel.dyn - found %s\n", | |
483 | old_section_names + OLD_SECTION_H(old_rel_dyn_index).sh_name); | |
484 | #endif | |
485 | if (!strcmp (old_section_names + OLD_SECTION_H(old_rel_dyn_index).sh_name, | |
486 | ".rel.dyn")) | |
487 | break; | |
488 | } | |
489 | if (old_rel_dyn_index == old_file_h->e_shnum) | |
490 | fatal ("Can't find .rel_dyn in %s.\n", old_name, 0); | |
491 | ||
492 | old_rel_dyn_addr = OLD_SECTION_H(old_rel_dyn_index).sh_addr; | |
493 | old_rel_dyn_size = OLD_SECTION_H(old_rel_dyn_index).sh_size; | |
494 | ||
f1913a26 RS |
495 | /* Figure out parameters of the new data3 and data2 sections. |
496 | * Change the sbss and bss sections. | |
497 | */ | |
498 | ||
499 | old_bss_addr = OLD_SECTION_H(old_bss_index).sh_addr; | |
500 | old_bss_size = OLD_SECTION_H(old_bss_index).sh_size; | |
501 | ||
502 | old_sbss_addr = OLD_SECTION_H(old_sbss_index).sh_addr; | |
503 | old_sbss_size = OLD_SECTION_H(old_sbss_index).sh_size; | |
504 | ||
505 | if (old_sdata_index) | |
506 | { | |
507 | old_sdata_size = OLD_SECTION_H(old_sdata_index).sh_size; | |
508 | } | |
509 | ||
510 | #if defined(emacs) || !defined(DEBUG) | |
511 | bss_end = (unsigned int) sbrk (0); | |
512 | new_bss_addr = (Elf32_Addr) bss_end; | |
513 | #else | |
514 | new_bss_addr = old_bss_addr + old_bss_size + 0x1234; | |
515 | #endif | |
516 | if (old_sdata_index) | |
517 | { | |
518 | new_sdata_size = OLD_SECTION_H(old_sbss_index).sh_offset - | |
519 | OLD_SECTION_H(old_sdata_index).sh_offset + old_sbss_size; | |
520 | } | |
521 | ||
522 | new_data3_addr = old_sbss_addr; | |
523 | new_data3_size = old_sbss_size; | |
524 | new_data3_offset = OLD_SECTION_H(old_sbss_index).sh_offset; | |
525 | ||
526 | new_data2_addr = old_bss_addr; | |
527 | new_data2_size = new_bss_addr - old_bss_addr; | |
528 | new_data2_align = (new_data3_offset + old_sbss_size) % | |
529 | OLD_SECTION_H(old_bss_index).sh_addralign; | |
530 | new_data2_align = new_data2_align ? | |
531 | OLD_SECTION_H(old_bss_index).sh_addralign - new_data2_align : | |
532 | 0; | |
533 | new_data2_offset = new_data3_offset + old_sbss_size + new_data2_align; | |
534 | ||
535 | old_bss_padding = OLD_SECTION_H(old_bss_index).sh_offset - | |
536 | OLD_SECTION_H(old_sbss_index).sh_offset; | |
537 | #ifdef DEBUG | |
538 | fprintf (stderr, "old_bss_index %d\n", old_bss_index); | |
539 | fprintf (stderr, "old_bss_addr %x\n", old_bss_addr); | |
540 | fprintf (stderr, "old_bss_size %x\n", old_bss_size); | |
541 | fprintf (stderr, "new_bss_addr %x\n", new_bss_addr); | |
542 | fprintf (stderr, "new_data2_addr %x\n", new_data2_addr); | |
543 | fprintf (stderr, "new_data2_size %x\n", new_data2_size); | |
544 | fprintf (stderr, "new_data2_offset %x\n", new_data2_offset); | |
545 | fprintf (stderr, "old_sbss_index %d\n", old_sbss_index); | |
546 | fprintf (stderr, "old_sbss_addr %x\n", old_sbss_addr); | |
547 | fprintf (stderr, "old_sbss_size %x\n", old_sbss_size); | |
b6f8e806 GM |
548 | fprintf (stderr, "old_rel_dyn_addr %x\n", old_rel_dyn_addr); |
549 | fprintf (stderr, "old_rel_dyn_size %x\n", old_rel_dyn_size); | |
f1913a26 RS |
550 | if (old_sdata_index) |
551 | { | |
552 | fprintf (stderr, "old_sdata_size %x\n", old_sdata_size); | |
553 | fprintf (stderr, "new_sdata_size %x\n", new_sdata_size); | |
554 | } | |
555 | else | |
556 | { | |
557 | fprintf (stderr, "new_data3_addr %x\n", new_data3_addr); | |
558 | fprintf (stderr, "new_data3_size %x\n", new_data3_size); | |
559 | fprintf (stderr, "new_data3_offset %x\n", new_data3_offset); | |
560 | } | |
561 | #endif | |
562 | ||
563 | if ((unsigned) new_bss_addr < (unsigned) old_bss_addr + old_bss_size) | |
564 | fatal (".bss shrank when undumping???\n", 0, 0); | |
565 | ||
566 | /* Set the output file to the right size and mmap(2) it. Set | |
567 | * pointers to various interesting objects. stat_buf still has | |
568 | * old_file data. | |
569 | */ | |
570 | ||
571 | new_file = open (new_name, O_RDWR | O_CREAT, 0666); | |
572 | if (new_file < 0) | |
573 | fatal ("Can't creat(%s): errno %d\n", new_name, errno); | |
574 | ||
575 | new_file_size = stat_buf.st_size + | |
576 | ((1 + (old_sdata_index ? 0 : 1)) * old_file_h->e_shentsize) + | |
577 | new_data2_size + new_data3_size + new_data2_align; | |
578 | ||
579 | if (ftruncate (new_file, new_file_size)) | |
580 | fatal ("Can't ftruncate(%s): errno %d\n", new_name, errno); | |
581 | ||
582 | new_base = mmap (0, new_file_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
583 | new_file, 0); | |
584 | ||
585 | if (new_base == (caddr_t) -1) | |
586 | fatal ("Can't mmap(%s): errno %d\n", new_name, errno); | |
587 | ||
588 | new_file_h = (Elf32_Ehdr *) new_base; | |
589 | new_program_h = (Elf32_Phdr *) ((byte *) new_base + old_file_h->e_phoff); | |
590 | new_section_h = (Elf32_Shdr *) ((byte *) new_base + | |
591 | old_file_h->e_shoff + | |
592 | new_data2_size + | |
593 | new_data2_align + | |
594 | new_data3_size); | |
595 | ||
596 | /* Make our new file, program and section headers as copies of the | |
597 | * originals. | |
598 | */ | |
599 | ||
600 | memcpy (new_file_h, old_file_h, old_file_h->e_ehsize); | |
601 | memcpy (new_program_h, old_program_h, | |
602 | old_file_h->e_phnum * old_file_h->e_phentsize); | |
603 | ||
604 | /* Modify the e_shstrndx if necessary. */ | |
605 | PATCH_INDEX (new_file_h->e_shstrndx); | |
606 | ||
607 | /* Fix up file header. We'll add one section. Section header is | |
608 | * further away now. | |
609 | */ | |
610 | ||
611 | new_file_h->e_shoff += new_data2_size + new_data2_align + new_data3_size; | |
612 | new_file_h->e_shnum += 1 + (old_sdata_index ? 0 : 1); | |
613 | ||
614 | #ifdef DEBUG | |
615 | fprintf (stderr, "Old section offset %x\n", old_file_h->e_shoff); | |
616 | fprintf (stderr, "Old section count %d\n", old_file_h->e_shnum); | |
617 | fprintf (stderr, "New section offset %x\n", new_file_h->e_shoff); | |
618 | fprintf (stderr, "New section count %d\n", new_file_h->e_shnum); | |
619 | #endif | |
620 | ||
621 | /* Fix up a new program header. Extend the writable data segment so | |
622 | * that the bss area is covered too. Find that segment by looking | |
623 | * for a segment that ends just before the .bss area. Make sure | |
624 | * that no segments are above the new .data2. Put a loop at the end | |
625 | * to adjust the offset and address of any segment that is above | |
626 | * data2, just in case we decide to allow this later. | |
627 | */ | |
628 | ||
629 | for (n = new_file_h->e_phnum - 1; n >= 0; n--) | |
630 | { | |
631 | /* Compute maximum of all requirements for alignment of section. */ | |
632 | int alignment = (NEW_PROGRAM_H (n)).p_align; | |
633 | if ((OLD_SECTION_H (old_bss_index)).sh_addralign > alignment) | |
634 | alignment = OLD_SECTION_H (old_bss_index).sh_addralign; | |
635 | ||
636 | if ((OLD_SECTION_H (old_sbss_index)).sh_addralign > alignment) | |
637 | alignment = OLD_SECTION_H (old_sbss_index).sh_addralign; | |
638 | ||
639 | /* Supposedly this condition is okay for the SGI. */ | |
640 | #if 0 | |
641 | if (NEW_PROGRAM_H(n).p_vaddr + NEW_PROGRAM_H(n).p_filesz > old_bss_addr) | |
642 | fatal ("Program segment above .bss in %s\n", old_name, 0); | |
643 | #endif | |
644 | ||
645 | if (NEW_PROGRAM_H(n).p_type == PT_LOAD | |
646 | && (round_up ((NEW_PROGRAM_H (n)).p_vaddr | |
647 | + (NEW_PROGRAM_H (n)).p_filesz, | |
648 | alignment) | |
649 | == round_up (old_bss_addr, alignment))) | |
650 | break; | |
651 | } | |
652 | if (n < 0) | |
653 | fatal ("Couldn't find segment next to .bss in %s\n", old_name, 0); | |
654 | ||
655 | NEW_PROGRAM_H(n).p_filesz += new_data2_size + new_data2_align + | |
656 | new_data3_size; | |
657 | NEW_PROGRAM_H(n).p_memsz = NEW_PROGRAM_H(n).p_filesz; | |
658 | ||
659 | #if 1 /* Maybe allow section after data2 - does this ever happen? */ | |
660 | for (n = new_file_h->e_phnum - 1; n >= 0; n--) | |
661 | { | |
662 | if (NEW_PROGRAM_H(n).p_vaddr | |
663 | && NEW_PROGRAM_H(n).p_vaddr >= new_data3_addr) | |
664 | NEW_PROGRAM_H(n).p_vaddr += new_data2_size - old_bss_size + | |
665 | new_data3_size - old_sbss_size; | |
666 | ||
667 | if (NEW_PROGRAM_H(n).p_offset >= new_data3_offset) | |
668 | NEW_PROGRAM_H(n).p_offset += new_data2_size + new_data2_align + | |
669 | new_data3_size; | |
670 | } | |
671 | #endif | |
672 | ||
673 | /* Fix up section headers based on new .data2 section. Any section | |
674 | * whose offset or virtual address is after the new .data2 section | |
675 | * gets its value adjusted. .bss size becomes zero and new address | |
676 | * is set. data2 section header gets added by copying the existing | |
677 | * .data header and modifying the offset, address and size. | |
678 | */ | |
679 | for (old_data_index = 1; old_data_index < old_file_h->e_shnum; | |
680 | old_data_index++) | |
681 | if (!strcmp (old_section_names + OLD_SECTION_H(old_data_index).sh_name, | |
682 | ".data")) | |
683 | break; | |
684 | if (old_data_index == old_file_h->e_shnum) | |
685 | fatal ("Can't find .data in %s.\n", old_name, 0); | |
686 | ||
177c0ea7 | 687 | /* Walk through all section headers, insert the new data2 section right |
f1913a26 RS |
688 | before the new bss section. */ |
689 | for (n = 1, nn = 1; n < old_file_h->e_shnum; n++, nn++) | |
690 | { | |
691 | caddr_t src; | |
692 | ||
693 | if (n == old_sbss_index) | |
694 | ||
695 | /* If it is sbss section, insert the new data3 section before it. */ | |
696 | { | |
697 | /* Steal the data section header for this data3 section. */ | |
698 | if (!old_sdata_index) | |
699 | { | |
700 | memcpy (&NEW_SECTION_H(nn), &OLD_SECTION_H(old_data_index), | |
701 | new_file_h->e_shentsize); | |
177c0ea7 | 702 | |
f1913a26 RS |
703 | NEW_SECTION_H(nn).sh_addr = new_data3_addr; |
704 | NEW_SECTION_H(nn).sh_offset = new_data3_offset; | |
705 | NEW_SECTION_H(nn).sh_size = new_data3_size; | |
706 | NEW_SECTION_H(nn).sh_flags = OLD_SECTION_H(n).sh_flags; | |
707 | /* Use the sbss section's alignment. This will assure that the | |
708 | new data3 section always be placed in the same spot as the old | |
709 | sbss section by any other application. */ | |
710 | NEW_SECTION_H(nn).sh_addralign = OLD_SECTION_H(n).sh_addralign; | |
711 | ||
712 | /* Now copy over what we have in the memory now. */ | |
177c0ea7 JB |
713 | memcpy (NEW_SECTION_H(nn).sh_offset + new_base, |
714 | (caddr_t) OLD_SECTION_H(n).sh_addr, | |
f1913a26 RS |
715 | new_data3_size); |
716 | /* the new .data2 section should also come before the | |
717 | * new .sbss section */ | |
718 | nn += 2; | |
719 | } | |
720 | else | |
721 | { | |
722 | /* We always have a .sdata section: append the contents of the | |
723 | * old .sbss section. | |
724 | */ | |
177c0ea7 JB |
725 | memcpy (new_data3_offset + new_base, |
726 | (caddr_t) OLD_SECTION_H(n).sh_addr, | |
f1913a26 RS |
727 | new_data3_size); |
728 | nn ++; | |
729 | } | |
730 | } | |
731 | else if (n == old_bss_index) | |
177c0ea7 | 732 | |
f1913a26 RS |
733 | /* If it is bss section, insert the new data2 section before it. */ |
734 | { | |
735 | Elf32_Word tmp_align; | |
736 | Elf32_Addr tmp_addr; | |
737 | ||
738 | tmp_align = OLD_SECTION_H(n).sh_addralign; | |
739 | tmp_addr = OLD_SECTION_H(n).sh_addr; | |
740 | ||
741 | nn -= 2; | |
742 | /* Steal the data section header for this data2 section. */ | |
743 | memcpy (&NEW_SECTION_H(nn), &OLD_SECTION_H(old_data_index), | |
744 | new_file_h->e_shentsize); | |
177c0ea7 | 745 | |
f1913a26 RS |
746 | NEW_SECTION_H(nn).sh_addr = new_data2_addr; |
747 | NEW_SECTION_H(nn).sh_offset = new_data2_offset; | |
748 | NEW_SECTION_H(nn).sh_size = new_data2_size; | |
749 | /* Use the bss section's alignment. This will assure that the | |
750 | new data2 section always be placed in the same spot as the old | |
751 | bss section by any other application. */ | |
752 | NEW_SECTION_H(nn).sh_addralign = tmp_align; | |
753 | ||
754 | /* Now copy over what we have in the memory now. */ | |
177c0ea7 | 755 | memcpy (NEW_SECTION_H(nn).sh_offset + new_base, |
f1913a26 RS |
756 | (caddr_t) tmp_addr, new_data2_size); |
757 | nn += 2; | |
758 | } | |
177c0ea7 JB |
759 | |
760 | memcpy (&NEW_SECTION_H(nn), &OLD_SECTION_H(n), | |
f1913a26 | 761 | old_file_h->e_shentsize); |
177c0ea7 | 762 | |
f1913a26 RS |
763 | if (old_sdata_index && n == old_sdata_index) |
764 | /* The old .sdata section has now a new size */ | |
765 | NEW_SECTION_H(nn).sh_size = new_sdata_size; | |
766 | ||
767 | /* The new bss section's size is zero, and its file offset and virtual | |
768 | address should be off by NEW_DATA2_SIZE. */ | |
769 | if (n == old_sbss_index) | |
770 | { | |
771 | /* NN should be `old_sbss_index + 2' at this point. */ | |
772 | NEW_SECTION_H(nn).sh_offset += new_data2_size + new_data2_align + | |
773 | new_data3_size; | |
774 | NEW_SECTION_H(nn).sh_addr += new_data2_size + new_data2_align + | |
775 | new_data3_size; | |
776 | /* Let the new bss section address alignment be the same as the | |
177c0ea7 | 777 | section address alignment followed the old bss section, so |
f1913a26 RS |
778 | this section will be placed in exactly the same place. */ |
779 | NEW_SECTION_H(nn).sh_addralign = | |
780 | OLD_SECTION_H(nn + (old_sdata_index ? 1 : 0)).sh_addralign; | |
781 | NEW_SECTION_H(nn).sh_size = 0; | |
782 | } | |
783 | else if (n == old_bss_index) | |
784 | { | |
785 | /* NN should be `old_bss_index + 2' at this point. */ | |
786 | NEW_SECTION_H(nn).sh_offset += new_data2_size + new_data2_align + | |
787 | new_data3_size - old_bss_padding; | |
788 | NEW_SECTION_H(nn).sh_addr += new_data2_size; | |
789 | /* Let the new bss section address alignment be the same as the | |
177c0ea7 | 790 | section address alignment followed the old bss section, so |
f1913a26 RS |
791 | this section will be placed in exactly the same place. */ |
792 | NEW_SECTION_H(nn).sh_addralign = | |
793 | OLD_SECTION_H((nn - (old_sdata_index ? 0 : 1))).sh_addralign; | |
794 | NEW_SECTION_H(nn).sh_size = 0; | |
795 | } | |
796 | /* Any section that was original placed AFTER the bss section should now | |
797 | be off by NEW_DATA2_SIZE. */ | |
798 | else if (NEW_SECTION_H(nn).sh_offset >= new_data3_offset) | |
799 | NEW_SECTION_H(nn).sh_offset += new_data2_size + | |
800 | new_data2_align + | |
801 | new_data3_size - | |
802 | old_bss_padding; | |
177c0ea7 | 803 | |
f1913a26 | 804 | /* If any section hdr refers to the section after the new .data |
177c0ea7 | 805 | section, make it refer to next one because we have inserted |
f1913a26 | 806 | a new section in between. */ |
177c0ea7 | 807 | |
f1913a26 RS |
808 | PATCH_INDEX(NEW_SECTION_H(nn).sh_link); |
809 | PATCH_INDEX(NEW_SECTION_H(nn).sh_info); | |
177c0ea7 | 810 | |
f1913a26 RS |
811 | /* Now, start to copy the content of sections. */ |
812 | if (NEW_SECTION_H(nn).sh_type == SHT_NULL | |
813 | || NEW_SECTION_H(nn).sh_type == SHT_NOBITS) | |
814 | continue; | |
177c0ea7 | 815 | |
f1913a26 RS |
816 | /* Write out the sections. .data, .data1 and .sdata get copied from |
817 | * the current process instead of the old file. | |
818 | */ | |
819 | if (!strcmp (old_section_names + OLD_SECTION_H(n).sh_name, ".data") || | |
820 | !strcmp (old_section_names + OLD_SECTION_H(n).sh_name, ".data1") || | |
821 | (old_sdata_index && (n == old_sdata_index))) | |
822 | src = (caddr_t) OLD_SECTION_H(n).sh_addr; | |
823 | else | |
824 | src = old_base + OLD_SECTION_H(n).sh_offset; | |
177c0ea7 | 825 | |
f1913a26 RS |
826 | memcpy (NEW_SECTION_H(nn).sh_offset + new_base, src, |
827 | ((n == old_sdata_index) ? | |
828 | old_sdata_size : | |
829 | NEW_SECTION_H(nn).sh_size)); | |
830 | ||
831 | /* If it is the symbol table, its st_shndx field needs to be patched. */ | |
832 | if (NEW_SECTION_H(nn).sh_type == SHT_SYMTAB | |
833 | || NEW_SECTION_H(nn).sh_type == SHT_DYNSYM) | |
834 | { | |
835 | Elf32_Shdr *spt = &NEW_SECTION_H(nn); | |
836 | unsigned int num = spt->sh_size / spt->sh_entsize; | |
177c0ea7 | 837 | Elf32_Sym * sym = (Elf32_Sym *) (NEW_SECTION_H(nn).sh_offset + |
f1913a26 RS |
838 | new_base); |
839 | for (; num--; sym++) | |
840 | { | |
841 | if ((sym->st_shndx == SHN_UNDEF) | |
842 | || (sym->st_shndx == SHN_ABS) | |
843 | || (sym->st_shndx == SHN_COMMON)) | |
844 | continue; | |
177c0ea7 | 845 | |
f1913a26 RS |
846 | PATCH_INDEX(sym->st_shndx); |
847 | } | |
848 | } | |
849 | } | |
b6f8e806 GM |
850 | { |
851 | Elf32_Rel *rel_p; | |
852 | unsigned int old_data_addr_start; | |
853 | unsigned int old_data_addr_end; | |
854 | unsigned int old_data_offset; | |
855 | unsigned int new_data_offset; | |
856 | int i; | |
857 | ||
858 | rel_p = (Elf32_Rel *)OLD_SECTION_H(old_rel_dyn_index).sh_addr; | |
859 | old_data_addr_start = OLD_SECTION_H(old_data_index).sh_addr; | |
860 | old_data_addr_end = old_data_addr_start + | |
861 | OLD_SECTION_H(old_data_index).sh_size; | |
862 | old_data_offset = (int)OLD_SECTION_H(old_data_index).sh_offset + | |
863 | (unsigned int)old_base; | |
864 | new_data_offset = (int)NEW_SECTION_H(old_data_index).sh_offset + | |
865 | (unsigned int)new_base; | |
866 | ||
867 | #ifdef DEBUG | |
868 | fprintf(stderr, "old_data.sh_addr= 0x%08x ... 0x%08x\n", old_data_addr_start, | |
869 | old_data_addr_end); | |
870 | #endif /* DEBUG */ | |
871 | ||
872 | for (i = 0; i < old_rel_dyn_size/sizeof(Elf32_Rel); i++) | |
873 | { | |
874 | #ifdef DEBUG | |
875 | fprintf(stderr, ".rel.dyn offset= 0x%08x type= %d sym= %d\n", | |
876 | rel_p->r_offset, ELF32_R_TYPE(rel_p->r_info), ELF32_R_SYM(rel_p->r_info)); | |
877 | #endif /* DEBUG */ | |
878 | ||
879 | if (rel_p->r_offset) | |
880 | { | |
881 | unsigned int offset; | |
882 | ||
883 | assert(old_data_addr_start <= rel_p->r_offset && | |
884 | rel_p->r_offset <= old_data_addr_end); | |
885 | ||
886 | offset = rel_p->r_offset - old_data_addr_start; | |
887 | ||
888 | #ifdef DEBUG | |
889 | fprintf(stderr, "r_offset= 0x%08x *r_offset= 0x%08x\n", | |
890 | rel_p->r_offset, *((int *)(rel_p->r_offset))); | |
891 | fprintf(stderr, "old = 0x%08x *old =0x%08x\n", | |
892 | (old_data_offset + offset - (unsigned int)old_base), | |
893 | *((int *)(old_data_offset + offset))); | |
894 | fprintf(stderr, "new = 0x%08x *new =0x%08x\n", | |
895 | (new_data_offset + offset - (unsigned int)new_base), | |
896 | *((int *)(new_data_offset + offset))); | |
897 | #endif /* DEBUG */ | |
898 | ||
899 | *((int *)(new_data_offset + offset)) = *((int *)(old_data_offset + offset)); | |
900 | } | |
901 | ||
902 | rel_p++; | |
903 | } | |
904 | } | |
f1913a26 RS |
905 | |
906 | /* Close the files and make the new file executable */ | |
907 | ||
908 | if (close (old_file)) | |
909 | fatal ("Can't close(%s): errno %d\n", old_name, errno); | |
910 | ||
911 | if (close (new_file)) | |
912 | fatal ("Can't close(%s): errno %d\n", new_name, errno); | |
913 | ||
914 | if (stat (new_name, &stat_buf) == -1) | |
915 | fatal ("Can't stat(%s): errno %d\n", new_name, errno); | |
916 | ||
917 | n = umask (777); | |
918 | umask (n); | |
919 | stat_buf.st_mode |= 0111 & ~n; | |
920 | if (chmod (new_name, stat_buf.st_mode) == -1) | |
921 | fatal ("Can't chmod(%s): errno %d\n", new_name, errno); | |
922 | } | |
ab5796a9 MB |
923 | |
924 | /* arch-tag: c784ead3-7a27-442b-83fe-7af8d08654d3 | |
925 | (do not change this comment) */ |