Commit | Line | Data |
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f1913a26 | 1 | /* Unexec for Siemens machines running Sinix (modified SVR4). |
f8c25f1b | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1990, 1992, 1993, 1994, 1995 |
f1913a26 RS |
3 | Free Software Foundation, Inc. |
4 | ||
3b7ad313 | 5 | This file is part of GNU Emacs. |
f1913a26 | 6 | |
3b7ad313 EN |
7 | GNU Emacs is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
f1913a26 | 11 | |
3b7ad313 EN |
12 | GNU Emacs is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. | |
f1913a26 RS |
21 | |
22 | In other words, you are welcome to use, share and improve this program. | |
23 | You are forbidden to forbid anyone else to use, share and improve | |
24 | what you give them. Help stamp out software-hoarding! */ | |
25 | ||
f1913a26 RS |
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: | |
36 | * unexec (new_name, a_name, data_start, bss_start, entry_address) | |
37 | * char *new_name, *a_name; | |
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. | |
42 | * If a_name is non-NULL, the symbol table will be taken from the given file. | |
43 | * On some machines, an existing a_name file is required. | |
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 | * | |
55 | * Specifying zero for data_start means the boundary between text and data | |
56 | * should not be the same as when the program was loaded. | |
57 | * If NO_REMAP is defined, the argument data_start is ignored and the | |
58 | * segment boundaries are never changed. | |
59 | * | |
60 | * Bss_start indicates how much of the data segment is to be saved in the | |
61 | * a.out file and restored when the program is executed. It gives the lowest | |
62 | * unsaved address, and is rounded up to a page boundary. The default when 0 | |
63 | * is given assumes that the entire data segment is to be stored, including | |
64 | * the previous data and bss as well as any additional storage allocated with | |
65 | * break (2). | |
66 | * | |
67 | * The new file is set up to start at entry_address. | |
68 | * | |
69 | * If you make improvements I'd like to get them too. | |
70 | * harpo!utah-cs!thomas, thomas@Utah-20 | |
71 | * | |
72 | */ | |
73 | ||
74 | /* Even more heavily modified by james@bigtex.cactus.org of Dell Computer Co. | |
75 | * ELF support added. | |
76 | * | |
77 | * Basic theory: the data space of the running process needs to be | |
78 | * dumped to the output file. Normally we would just enlarge the size | |
79 | * of .data, scooting everything down. But we can't do that in ELF, | |
80 | * because there is often something between the .data space and the | |
81 | * .bss space. | |
82 | * | |
83 | * In the temacs dump below, notice that the Global Offset Table | |
84 | * (.got) and the Dynamic link data (.dynamic) come between .data1 and | |
85 | * .bss. It does not work to overlap .data with these fields. | |
86 | * | |
87 | * The solution is to create a new .data segment. This segment is | |
88 | * filled with data from the current process. Since the contents of | |
89 | * various sections refer to sections by index, the new .data segment | |
90 | * is made the last in the table to avoid changing any existing index. | |
91 | */ | |
92 | ||
177c0ea7 JB |
93 | /* Modified by wtien@urbana.mcd.mot.com of Motorola Inc. |
94 | * | |
f1913a26 | 95 | * The above mechanism does not work if the unexeced ELF file is being |
177c0ea7 | 96 | * re-layout by other applications (such as `strip'). All the applications |
f1913a26 | 97 | * that re-layout the internal of ELF will layout all sections in ascending |
177c0ea7 JB |
98 | * order of their file offsets. After the re-layout, the data2 section will |
99 | * still be the LAST section in the section header vector, but its file offset | |
f1913a26 | 100 | * is now being pushed far away down, and causes part of it not to be mapped |
177c0ea7 | 101 | * in (ie. not covered by the load segment entry in PHDR vector), therefore |
f1913a26 RS |
102 | * causes the new binary to fail. |
103 | * | |
104 | * The solution is to modify the unexec algorithm to insert the new data2 | |
105 | * section header right before the new bss section header, so their file | |
177c0ea7 JB |
106 | * offsets will be in the ascending order. Since some of the section's (all |
107 | * sections AFTER the bss section) indexes are now changed, we also need to | |
108 | * modify some fields to make them point to the right sections. This is done | |
f1913a26 | 109 | * by macro PATCH_INDEX. All the fields that need to be patched are: |
177c0ea7 | 110 | * |
f1913a26 RS |
111 | * 1. ELF header e_shstrndx field. |
112 | * 2. section header sh_link and sh_info field. | |
113 | * 3. symbol table entry st_shndx field. | |
114 | */ | |
115 | ||
116 | /* | |
117 | * New modifications for Siemens Nixdorf's MIPS-based machines. | |
118 | * Marco.Walther@mch.sni.de | |
b6f8e806 | 119 | * marco@inreach.com |
f1913a26 RS |
120 | * |
121 | * The problem: Before the bss segment we have a so called sbss segment | |
122 | * (small bss) and maybe an sdata segment. These segments | |
123 | * must also be handled correct. | |
124 | * | |
125 | * /home1/marco/emacs/emacs-19.22/src | |
126 | * dump -hv temacs | |
177c0ea7 | 127 | * |
f1913a26 RS |
128 | * temacs: |
129 | * | |
130 | * **** SECTION HEADER TABLE **** | |
131 | * [No] Type Flags Addr Offset Size Name | |
132 | * Link Info Adralgn Entsize | |
133 | * | |
134 | * [1] PBIT -A-- 0x4000f4 0xf4 0x13 .interp | |
177c0ea7 | 135 | * 0 0 0x1 0 |
f1913a26 RS |
136 | * |
137 | * [2] REGI -A-- 0x400108 0x108 0x18 .reginfo | |
177c0ea7 | 138 | * 0 0 0x4 0x18 |
f1913a26 RS |
139 | * |
140 | * [3] DYNM -A-- 0x400120 0x120 0xb8 .dynamic | |
177c0ea7 | 141 | * 6 0 0x4 0x8 |
f1913a26 RS |
142 | * |
143 | * [4] HASH -A-- 0x4001d8 0x1d8 0x8a0 .hash | |
177c0ea7 | 144 | * 5 0 0x4 0x4 |
f1913a26 RS |
145 | * |
146 | * [5] DYNS -A-- 0x400a78 0xa78 0x11f0 .dynsym | |
177c0ea7 | 147 | * 6 2 0x4 0x10 |
f1913a26 RS |
148 | * |
149 | * [6] STRT -A-- 0x401c68 0x1c68 0xbf9 .dynstr | |
177c0ea7 | 150 | * 0 0 0x1 0 |
f1913a26 RS |
151 | * |
152 | * [7] REL -A-- 0x402864 0x2864 0x18 .rel.dyn | |
177c0ea7 | 153 | * 5 14 0x4 0x8 |
f1913a26 RS |
154 | * |
155 | * [8] PBIT -AI- 0x402880 0x2880 0x60 .init | |
177c0ea7 | 156 | * 0 0 0x10 0x1 |
f1913a26 RS |
157 | * |
158 | * [9] PBIT -AI- 0x4028e0 0x28e0 0x1234 .plt | |
177c0ea7 | 159 | * 0 0 0x4 0x4 |
f1913a26 RS |
160 | * |
161 | * [10] PBIT -AI- 0x403b20 0x3b20 0xee400 .text | |
177c0ea7 | 162 | * 0 0 0x20 0x1 |
f1913a26 RS |
163 | * |
164 | * [11] PBIT -AI- 0x4f1f20 0xf1f20 0x60 .fini | |
177c0ea7 | 165 | * 0 0 0x10 0x1 |
f1913a26 RS |
166 | * |
167 | * [12] PBIT -A-- 0x4f1f80 0xf1f80 0xd90 .rdata | |
177c0ea7 | 168 | * 0 0 0x10 0x1 |
f1913a26 RS |
169 | * |
170 | * [13] PBIT -A-- 0x4f2d10 0xf2d10 0x17e0 .rodata | |
177c0ea7 | 171 | * 0 0 0x10 0x1 |
f1913a26 RS |
172 | * |
173 | * [14] PBIT WA-- 0x5344f0 0xf44f0 0x4b3e4 .data <<<<< | |
177c0ea7 | 174 | * 0 0 0x10 0x1 |
f1913a26 RS |
175 | * |
176 | * [15] PBIT WA-G 0x57f8d4 0x13f8d4 0x2a84 .got | |
177c0ea7 | 177 | * 0 0 0x4 0x4 |
f1913a26 RS |
178 | * |
179 | * [16] PBIT WA-G 0x582360 0x142360 0x10 .sdata <<<<< | |
177c0ea7 | 180 | * 0 0 0x10 0x1 |
f1913a26 RS |
181 | * |
182 | * [17] NOBI WA-G 0x582370 0x142370 0xb84 .sbss <<<<< | |
177c0ea7 | 183 | * 0 0 0x4 0 |
f1913a26 RS |
184 | * |
185 | * [18] NOBI WA-- 0x582f00 0x142370 0x27ec0 .bss <<<<< | |
177c0ea7 | 186 | * 0 0 0x10 0x1 |
f1913a26 RS |
187 | * |
188 | * [19] SYMT ---- 0 0x142370 0x10e40 .symtab | |
177c0ea7 | 189 | * 20 1108 0x4 0x10 |
f1913a26 RS |
190 | * |
191 | * [20] STRT ---- 0 0x1531b0 0xed9e .strtab | |
177c0ea7 | 192 | * 0 0 0x1 0 |
f1913a26 RS |
193 | * |
194 | * [21] STRT ---- 0 0x161f4e 0xb5 .shstrtab | |
177c0ea7 | 195 | * 0 0 0x1 0 |
f1913a26 RS |
196 | * |
197 | * [22] PBIT ---- 0 0x162003 0x28e2a .comment | |
177c0ea7 | 198 | * 0 0 0x1 0x1 |
f1913a26 RS |
199 | * |
200 | * [23] PBIT ---- 0 0x18ae2d 0x592 .debug | |
177c0ea7 | 201 | * 0 0 0x1 0 |
f1913a26 RS |
202 | * |
203 | * [24] PBIT ---- 0 0x18b3bf 0x80 .line | |
177c0ea7 | 204 | * 0 0 0x1 0 |
f1913a26 RS |
205 | * |
206 | * [25] MDBG ---- 0 0x18b440 0x60 .mdebug | |
177c0ea7 | 207 | * 0 0 0x4 0 |
f1913a26 RS |
208 | * |
209 | * | |
210 | * dump -hv emacs | |
177c0ea7 | 211 | * |
f1913a26 RS |
212 | * emacs: |
213 | * | |
214 | * **** SECTION HEADER TABLE **** | |
215 | * [No] Type Flags Addr Offset Size Name | |
216 | * Link Info Adralgn Entsize | |
217 | * | |
218 | * [1] PBIT -A-- 0x4000f4 0xf4 0x13 .interp | |
177c0ea7 | 219 | * 0 0 0x1 0 |
f1913a26 RS |
220 | * |
221 | * [2] REGI -A-- 0x400108 0x108 0x18 .reginfo | |
177c0ea7 | 222 | * 0 0 0x4 0x18 |
f1913a26 RS |
223 | * |
224 | * [3] DYNM -A-- 0x400120 0x120 0xb8 .dynamic | |
177c0ea7 | 225 | * 6 0 0x4 0x8 |
f1913a26 RS |
226 | * |
227 | * [4] HASH -A-- 0x4001d8 0x1d8 0x8a0 .hash | |
177c0ea7 | 228 | * 5 0 0x4 0x4 |
f1913a26 RS |
229 | * |
230 | * [5] DYNS -A-- 0x400a78 0xa78 0x11f0 .dynsym | |
177c0ea7 | 231 | * 6 2 0x4 0x10 |
f1913a26 RS |
232 | * |
233 | * [6] STRT -A-- 0x401c68 0x1c68 0xbf9 .dynstr | |
177c0ea7 | 234 | * 0 0 0x1 0 |
f1913a26 RS |
235 | * |
236 | * [7] REL -A-- 0x402864 0x2864 0x18 .rel.dyn | |
177c0ea7 | 237 | * 5 14 0x4 0x8 |
f1913a26 RS |
238 | * |
239 | * [8] PBIT -AI- 0x402880 0x2880 0x60 .init | |
177c0ea7 | 240 | * 0 0 0x10 0x1 |
f1913a26 RS |
241 | * |
242 | * [9] PBIT -AI- 0x4028e0 0x28e0 0x1234 .plt | |
177c0ea7 | 243 | * 0 0 0x4 0x4 |
f1913a26 RS |
244 | * |
245 | * [10] PBIT -AI- 0x403b20 0x3b20 0xee400 .text | |
177c0ea7 | 246 | * 0 0 0x20 0x1 |
f1913a26 RS |
247 | * |
248 | * [11] PBIT -AI- 0x4f1f20 0xf1f20 0x60 .fini | |
177c0ea7 | 249 | * 0 0 0x10 0x1 |
f1913a26 RS |
250 | * |
251 | * [12] PBIT -A-- 0x4f1f80 0xf1f80 0xd90 .rdata | |
177c0ea7 | 252 | * 0 0 0x10 0x1 |
f1913a26 RS |
253 | * |
254 | * [13] PBIT -A-- 0x4f2d10 0xf2d10 0x17e0 .rodata | |
177c0ea7 | 255 | * 0 0 0x10 0x1 |
f1913a26 RS |
256 | * |
257 | * [14] PBIT WA-- 0x5344f0 0xf44f0 0x4b3e4 .data <<<<< | |
177c0ea7 | 258 | * 0 0 0x10 0x1 |
f1913a26 RS |
259 | * |
260 | * [15] PBIT WA-G 0x57f8d4 0x13f8d4 0x2a84 .got | |
177c0ea7 | 261 | * 0 0 0x4 0x4 |
f1913a26 RS |
262 | * |
263 | * [16] PBIT WA-G 0x582360 0x142360 0xb94 .sdata <<<<< | |
177c0ea7 | 264 | * 0 0 0x10 0x1 |
f1913a26 RS |
265 | * |
266 | * [17] PBIT WA-- 0x582f00 0x142f00 0x94100 .data <<<<< | |
177c0ea7 | 267 | * 0 0 0x10 0x1 |
f1913a26 RS |
268 | * |
269 | * [18] NOBI WA-G 0x617000 0x1d7000 0 .sbss <<<<< | |
177c0ea7 | 270 | * 0 0 0x4 0 |
f1913a26 RS |
271 | * |
272 | * [19] NOBI WA-- 0x617000 0x1d7000 0 .bss <<<<< | |
177c0ea7 | 273 | * 0 0 0x4 0x1 |
f1913a26 RS |
274 | * |
275 | * [20] SYMT ---- 0 0x1d7000 0x10e40 .symtab | |
177c0ea7 | 276 | * 21 1109 0x4 0x10 |
f1913a26 RS |
277 | * |
278 | * [21] STRT ---- 0 0x1e7e40 0xed9e .strtab | |
177c0ea7 | 279 | * 0 0 0x1 0 |
f1913a26 RS |
280 | * |
281 | * [22] STRT ---- 0 0x1f6bde 0xb5 .shstrtab | |
177c0ea7 | 282 | * 0 0 0x1 0 |
f1913a26 RS |
283 | * |
284 | * [23] PBIT ---- 0 0x1f6c93 0x28e2a .comment | |
177c0ea7 | 285 | * 0 0 0x1 0x1 |
f1913a26 RS |
286 | * |
287 | * [24] PBIT ---- 0 0x21fabd 0x592 .debug | |
177c0ea7 | 288 | * 0 0 0x1 0 |
f1913a26 RS |
289 | * |
290 | * [25] PBIT ---- 0 0x22004f 0x80 .line | |
177c0ea7 | 291 | * 0 0 0x1 0 |
f1913a26 RS |
292 | * |
293 | * [26] MDBG ---- 0 0x2200d0 0x60 .mdebug | |
177c0ea7 | 294 | * 0 0 0x4 0 |
f1913a26 RS |
295 | * |
296 | */ | |
297 | \f | |
298 | #include <sys/types.h> | |
299 | #include <stdio.h> | |
300 | #include <sys/stat.h> | |
301 | #include <memory.h> | |
302 | #include <string.h> | |
303 | #include <errno.h> | |
304 | #include <unistd.h> | |
305 | #include <fcntl.h> | |
306 | #include <elf.h> | |
307 | #include <sys/mman.h> | |
b6f8e806 GM |
308 | #include <assert.h> |
309 | ||
310 | /* #define DEBUG */ | |
f1913a26 RS |
311 | |
312 | #ifndef emacs | |
313 | #define fatal(a, b, c) fprintf(stderr, a, b, c), exit(1) | |
314 | #else | |
315 | extern void fatal(char *, ...); | |
316 | #endif | |
317 | ||
318 | /* Get the address of a particular section or program header entry, | |
319 | * accounting for the size of the entries. | |
320 | */ | |
321 | ||
322 | #define OLD_SECTION_H(n) \ | |
323 | (*(Elf32_Shdr *) ((byte *) old_section_h + old_file_h->e_shentsize * (n))) | |
324 | #define NEW_SECTION_H(n) \ | |
325 | (*(Elf32_Shdr *) ((byte *) new_section_h + new_file_h->e_shentsize * (n))) | |
326 | #define OLD_PROGRAM_H(n) \ | |
327 | (*(Elf32_Phdr *) ((byte *) old_program_h + old_file_h->e_phentsize * (n))) | |
328 | #define NEW_PROGRAM_H(n) \ | |
329 | (*(Elf32_Phdr *) ((byte *) new_program_h + new_file_h->e_phentsize * (n))) | |
330 | ||
331 | #define PATCH_INDEX(n) \ | |
332 | do { \ | |
333 | if ((n) >= old_sbss_index) \ | |
334 | (n) += 1 + (old_sdata_index ? 0 : 1); } while (0) | |
335 | ||
336 | typedef unsigned char byte; | |
337 | ||
338 | /* Round X up to a multiple of Y. */ | |
339 | ||
340 | int | |
341 | round_up (x, y) | |
342 | int x, y; | |
343 | { | |
344 | int rem = x % y; | |
345 | if (rem == 0) | |
346 | return x; | |
347 | return x - rem + y; | |
348 | } | |
349 | ||
350 | /* **************************************************************** | |
351 | * unexec | |
352 | * | |
353 | * driving logic. | |
354 | * | |
355 | * In ELF, this works by replacing the old .bss section with a new | |
356 | * .data section, and inserting an empty .bss immediately afterwards. | |
357 | * | |
358 | */ | |
359 | void | |
360 | unexec (new_name, old_name, data_start, bss_start, entry_address) | |
361 | char *new_name, *old_name; | |
362 | unsigned data_start, bss_start, entry_address; | |
363 | { | |
364 | extern unsigned int bss_end; | |
365 | int new_file, old_file, new_file_size; | |
366 | ||
367 | /* Pointers to the base of the image of the two files. */ | |
368 | caddr_t old_base, new_base; | |
369 | ||
370 | /* Pointers to the file, program and section headers for the old and new | |
371 | * files. | |
372 | */ | |
373 | Elf32_Ehdr *old_file_h, *new_file_h; | |
374 | Elf32_Phdr *old_program_h, *new_program_h; | |
375 | Elf32_Shdr *old_section_h, *new_section_h; | |
376 | ||
377 | /* Point to the section name table in the old file */ | |
378 | char *old_section_names; | |
379 | ||
380 | Elf32_Addr old_bss_addr, new_bss_addr; | |
381 | Elf32_Addr old_sbss_addr; | |
382 | Elf32_Word old_bss_size, new_data2_size; | |
383 | Elf32_Word old_sbss_size, new_data3_size; | |
384 | Elf32_Off new_data2_offset; | |
385 | Elf32_Off new_data3_offset; | |
386 | Elf32_Addr new_data2_addr; | |
387 | Elf32_Addr new_data3_addr; | |
388 | ||
b6f8e806 GM |
389 | |
390 | Elf32_Addr old_rel_dyn_addr; | |
391 | Elf32_Word old_rel_dyn_size; | |
392 | int old_rel_dyn_index; | |
393 | ||
f1913a26 RS |
394 | Elf32_Word old_sdata_size, new_sdata_size; |
395 | int old_sdata_index = 0; | |
396 | ||
397 | int n, nn, old_data_index, new_data2_align; | |
398 | int old_bss_index; | |
399 | int old_sbss_index; | |
400 | int old_bss_padding; | |
401 | struct stat stat_buf; | |
402 | ||
403 | /* Open the old file & map it into the address space. */ | |
404 | ||
405 | old_file = open (old_name, O_RDONLY); | |
406 | ||
407 | if (old_file < 0) | |
408 | fatal ("Can't open %s for reading: errno %d\n", old_name, errno); | |
409 | ||
410 | if (fstat (old_file, &stat_buf) == -1) | |
411 | fatal ("Can't fstat(%s): errno %d\n", old_name, errno); | |
412 | ||
413 | old_base = mmap (0, stat_buf.st_size, PROT_READ, MAP_SHARED, old_file, 0); | |
414 | ||
415 | if (old_base == (caddr_t) -1) | |
416 | fatal ("Can't mmap(%s): errno %d\n", old_name, errno); | |
417 | ||
418 | #ifdef DEBUG | |
419 | fprintf (stderr, "mmap(%s, %x) -> %x\n", old_name, stat_buf.st_size, | |
420 | old_base); | |
421 | #endif | |
422 | ||
423 | /* Get pointers to headers & section names */ | |
424 | ||
425 | old_file_h = (Elf32_Ehdr *) old_base; | |
426 | old_program_h = (Elf32_Phdr *) ((byte *) old_base + old_file_h->e_phoff); | |
427 | old_section_h = (Elf32_Shdr *) ((byte *) old_base + old_file_h->e_shoff); | |
428 | old_section_names = (char *) old_base | |
429 | + OLD_SECTION_H(old_file_h->e_shstrndx).sh_offset; | |
430 | ||
431 | /* Find the old .sbss section. | |
432 | */ | |
433 | ||
434 | for (old_sbss_index = 1; old_sbss_index < old_file_h->e_shnum; | |
435 | old_sbss_index++) | |
436 | { | |
437 | #ifdef DEBUG | |
438 | fprintf (stderr, "Looking for .sbss - found %s\n", | |
439 | old_section_names + OLD_SECTION_H(old_sbss_index).sh_name); | |
440 | #endif | |
441 | if (!strcmp (old_section_names + OLD_SECTION_H(old_sbss_index).sh_name, | |
442 | ".sbss")) | |
443 | break; | |
444 | } | |
445 | if (old_sbss_index == old_file_h->e_shnum) | |
446 | fatal ("Can't find .sbss in %s.\n", old_name, 0); | |
447 | ||
448 | if (!strcmp(old_section_names + OLD_SECTION_H(old_sbss_index - 1).sh_name, | |
449 | ".sdata")) | |
450 | { | |
451 | old_sdata_index = old_sbss_index - 1; | |
452 | } | |
177c0ea7 | 453 | |
f1913a26 RS |
454 | |
455 | /* Find the old .bss section. | |
456 | */ | |
457 | ||
458 | for (old_bss_index = 1; old_bss_index < old_file_h->e_shnum; old_bss_index++) | |
459 | { | |
460 | #ifdef DEBUG | |
461 | fprintf (stderr, "Looking for .bss - found %s\n", | |
462 | old_section_names + OLD_SECTION_H(old_bss_index).sh_name); | |
463 | #endif | |
464 | if (!strcmp (old_section_names + OLD_SECTION_H(old_bss_index).sh_name, | |
465 | ".bss")) | |
466 | break; | |
467 | } | |
468 | if (old_bss_index == old_file_h->e_shnum) | |
469 | fatal ("Can't find .bss in %s.\n", old_name, 0); | |
470 | ||
471 | if (old_sbss_index != (old_bss_index - 1)) | |
b75dac61 | 472 | fatal (".sbss should come immediately before .bss in %s.\n", old_name, 0); |
f1913a26 | 473 | |
b6f8e806 GM |
474 | /* Find the old .rel.dyn section. |
475 | */ | |
476 | ||
477 | for (old_rel_dyn_index = 1; old_rel_dyn_index < old_file_h->e_shnum; | |
478 | old_rel_dyn_index++) | |
479 | { | |
480 | #ifdef DEBUG | |
481 | fprintf (stderr, "Looking for .rel.dyn - found %s\n", | |
482 | old_section_names + OLD_SECTION_H(old_rel_dyn_index).sh_name); | |
483 | #endif | |
484 | if (!strcmp (old_section_names + OLD_SECTION_H(old_rel_dyn_index).sh_name, | |
485 | ".rel.dyn")) | |
486 | break; | |
487 | } | |
488 | if (old_rel_dyn_index == old_file_h->e_shnum) | |
489 | fatal ("Can't find .rel_dyn in %s.\n", old_name, 0); | |
490 | ||
491 | old_rel_dyn_addr = OLD_SECTION_H(old_rel_dyn_index).sh_addr; | |
492 | old_rel_dyn_size = OLD_SECTION_H(old_rel_dyn_index).sh_size; | |
493 | ||
f1913a26 RS |
494 | /* Figure out parameters of the new data3 and data2 sections. |
495 | * Change the sbss and bss sections. | |
496 | */ | |
497 | ||
498 | old_bss_addr = OLD_SECTION_H(old_bss_index).sh_addr; | |
499 | old_bss_size = OLD_SECTION_H(old_bss_index).sh_size; | |
500 | ||
501 | old_sbss_addr = OLD_SECTION_H(old_sbss_index).sh_addr; | |
502 | old_sbss_size = OLD_SECTION_H(old_sbss_index).sh_size; | |
503 | ||
504 | if (old_sdata_index) | |
505 | { | |
506 | old_sdata_size = OLD_SECTION_H(old_sdata_index).sh_size; | |
507 | } | |
508 | ||
509 | #if defined(emacs) || !defined(DEBUG) | |
510 | bss_end = (unsigned int) sbrk (0); | |
511 | new_bss_addr = (Elf32_Addr) bss_end; | |
512 | #else | |
513 | new_bss_addr = old_bss_addr + old_bss_size + 0x1234; | |
514 | #endif | |
515 | if (old_sdata_index) | |
516 | { | |
517 | new_sdata_size = OLD_SECTION_H(old_sbss_index).sh_offset - | |
518 | OLD_SECTION_H(old_sdata_index).sh_offset + old_sbss_size; | |
519 | } | |
520 | ||
521 | new_data3_addr = old_sbss_addr; | |
522 | new_data3_size = old_sbss_size; | |
523 | new_data3_offset = OLD_SECTION_H(old_sbss_index).sh_offset; | |
524 | ||
525 | new_data2_addr = old_bss_addr; | |
526 | new_data2_size = new_bss_addr - old_bss_addr; | |
527 | new_data2_align = (new_data3_offset + old_sbss_size) % | |
528 | OLD_SECTION_H(old_bss_index).sh_addralign; | |
529 | new_data2_align = new_data2_align ? | |
530 | OLD_SECTION_H(old_bss_index).sh_addralign - new_data2_align : | |
531 | 0; | |
532 | new_data2_offset = new_data3_offset + old_sbss_size + new_data2_align; | |
533 | ||
534 | old_bss_padding = OLD_SECTION_H(old_bss_index).sh_offset - | |
535 | OLD_SECTION_H(old_sbss_index).sh_offset; | |
536 | #ifdef DEBUG | |
537 | fprintf (stderr, "old_bss_index %d\n", old_bss_index); | |
538 | fprintf (stderr, "old_bss_addr %x\n", old_bss_addr); | |
539 | fprintf (stderr, "old_bss_size %x\n", old_bss_size); | |
540 | fprintf (stderr, "new_bss_addr %x\n", new_bss_addr); | |
541 | fprintf (stderr, "new_data2_addr %x\n", new_data2_addr); | |
542 | fprintf (stderr, "new_data2_size %x\n", new_data2_size); | |
543 | fprintf (stderr, "new_data2_offset %x\n", new_data2_offset); | |
544 | fprintf (stderr, "old_sbss_index %d\n", old_sbss_index); | |
545 | fprintf (stderr, "old_sbss_addr %x\n", old_sbss_addr); | |
546 | fprintf (stderr, "old_sbss_size %x\n", old_sbss_size); | |
b6f8e806 GM |
547 | fprintf (stderr, "old_rel_dyn_addr %x\n", old_rel_dyn_addr); |
548 | fprintf (stderr, "old_rel_dyn_size %x\n", old_rel_dyn_size); | |
f1913a26 RS |
549 | if (old_sdata_index) |
550 | { | |
551 | fprintf (stderr, "old_sdata_size %x\n", old_sdata_size); | |
552 | fprintf (stderr, "new_sdata_size %x\n", new_sdata_size); | |
553 | } | |
554 | else | |
555 | { | |
556 | fprintf (stderr, "new_data3_addr %x\n", new_data3_addr); | |
557 | fprintf (stderr, "new_data3_size %x\n", new_data3_size); | |
558 | fprintf (stderr, "new_data3_offset %x\n", new_data3_offset); | |
559 | } | |
560 | #endif | |
561 | ||
562 | if ((unsigned) new_bss_addr < (unsigned) old_bss_addr + old_bss_size) | |
563 | fatal (".bss shrank when undumping???\n", 0, 0); | |
564 | ||
565 | /* Set the output file to the right size and mmap(2) it. Set | |
566 | * pointers to various interesting objects. stat_buf still has | |
567 | * old_file data. | |
568 | */ | |
569 | ||
570 | new_file = open (new_name, O_RDWR | O_CREAT, 0666); | |
571 | if (new_file < 0) | |
572 | fatal ("Can't creat(%s): errno %d\n", new_name, errno); | |
573 | ||
574 | new_file_size = stat_buf.st_size + | |
575 | ((1 + (old_sdata_index ? 0 : 1)) * old_file_h->e_shentsize) + | |
576 | new_data2_size + new_data3_size + new_data2_align; | |
577 | ||
578 | if (ftruncate (new_file, new_file_size)) | |
579 | fatal ("Can't ftruncate(%s): errno %d\n", new_name, errno); | |
580 | ||
581 | new_base = mmap (0, new_file_size, PROT_READ | PROT_WRITE, MAP_SHARED, | |
582 | new_file, 0); | |
583 | ||
584 | if (new_base == (caddr_t) -1) | |
585 | fatal ("Can't mmap(%s): errno %d\n", new_name, errno); | |
586 | ||
587 | new_file_h = (Elf32_Ehdr *) new_base; | |
588 | new_program_h = (Elf32_Phdr *) ((byte *) new_base + old_file_h->e_phoff); | |
589 | new_section_h = (Elf32_Shdr *) ((byte *) new_base + | |
590 | old_file_h->e_shoff + | |
591 | new_data2_size + | |
592 | new_data2_align + | |
593 | new_data3_size); | |
594 | ||
595 | /* Make our new file, program and section headers as copies of the | |
596 | * originals. | |
597 | */ | |
598 | ||
599 | memcpy (new_file_h, old_file_h, old_file_h->e_ehsize); | |
600 | memcpy (new_program_h, old_program_h, | |
601 | old_file_h->e_phnum * old_file_h->e_phentsize); | |
602 | ||
603 | /* Modify the e_shstrndx if necessary. */ | |
604 | PATCH_INDEX (new_file_h->e_shstrndx); | |
605 | ||
606 | /* Fix up file header. We'll add one section. Section header is | |
607 | * further away now. | |
608 | */ | |
609 | ||
610 | new_file_h->e_shoff += new_data2_size + new_data2_align + new_data3_size; | |
611 | new_file_h->e_shnum += 1 + (old_sdata_index ? 0 : 1); | |
612 | ||
613 | #ifdef DEBUG | |
614 | fprintf (stderr, "Old section offset %x\n", old_file_h->e_shoff); | |
615 | fprintf (stderr, "Old section count %d\n", old_file_h->e_shnum); | |
616 | fprintf (stderr, "New section offset %x\n", new_file_h->e_shoff); | |
617 | fprintf (stderr, "New section count %d\n", new_file_h->e_shnum); | |
618 | #endif | |
619 | ||
620 | /* Fix up a new program header. Extend the writable data segment so | |
621 | * that the bss area is covered too. Find that segment by looking | |
622 | * for a segment that ends just before the .bss area. Make sure | |
623 | * that no segments are above the new .data2. Put a loop at the end | |
624 | * to adjust the offset and address of any segment that is above | |
625 | * data2, just in case we decide to allow this later. | |
626 | */ | |
627 | ||
628 | for (n = new_file_h->e_phnum - 1; n >= 0; n--) | |
629 | { | |
630 | /* Compute maximum of all requirements for alignment of section. */ | |
631 | int alignment = (NEW_PROGRAM_H (n)).p_align; | |
632 | if ((OLD_SECTION_H (old_bss_index)).sh_addralign > alignment) | |
633 | alignment = OLD_SECTION_H (old_bss_index).sh_addralign; | |
634 | ||
635 | if ((OLD_SECTION_H (old_sbss_index)).sh_addralign > alignment) | |
636 | alignment = OLD_SECTION_H (old_sbss_index).sh_addralign; | |
637 | ||
638 | /* Supposedly this condition is okay for the SGI. */ | |
639 | #if 0 | |
640 | if (NEW_PROGRAM_H(n).p_vaddr + NEW_PROGRAM_H(n).p_filesz > old_bss_addr) | |
641 | fatal ("Program segment above .bss in %s\n", old_name, 0); | |
642 | #endif | |
643 | ||
644 | if (NEW_PROGRAM_H(n).p_type == PT_LOAD | |
645 | && (round_up ((NEW_PROGRAM_H (n)).p_vaddr | |
646 | + (NEW_PROGRAM_H (n)).p_filesz, | |
647 | alignment) | |
648 | == round_up (old_bss_addr, alignment))) | |
649 | break; | |
650 | } | |
651 | if (n < 0) | |
652 | fatal ("Couldn't find segment next to .bss in %s\n", old_name, 0); | |
653 | ||
654 | NEW_PROGRAM_H(n).p_filesz += new_data2_size + new_data2_align + | |
655 | new_data3_size; | |
656 | NEW_PROGRAM_H(n).p_memsz = NEW_PROGRAM_H(n).p_filesz; | |
657 | ||
658 | #if 1 /* Maybe allow section after data2 - does this ever happen? */ | |
659 | for (n = new_file_h->e_phnum - 1; n >= 0; n--) | |
660 | { | |
661 | if (NEW_PROGRAM_H(n).p_vaddr | |
662 | && NEW_PROGRAM_H(n).p_vaddr >= new_data3_addr) | |
663 | NEW_PROGRAM_H(n).p_vaddr += new_data2_size - old_bss_size + | |
664 | new_data3_size - old_sbss_size; | |
665 | ||
666 | if (NEW_PROGRAM_H(n).p_offset >= new_data3_offset) | |
667 | NEW_PROGRAM_H(n).p_offset += new_data2_size + new_data2_align + | |
668 | new_data3_size; | |
669 | } | |
670 | #endif | |
671 | ||
672 | /* Fix up section headers based on new .data2 section. Any section | |
673 | * whose offset or virtual address is after the new .data2 section | |
674 | * gets its value adjusted. .bss size becomes zero and new address | |
675 | * is set. data2 section header gets added by copying the existing | |
676 | * .data header and modifying the offset, address and size. | |
677 | */ | |
678 | for (old_data_index = 1; old_data_index < old_file_h->e_shnum; | |
679 | old_data_index++) | |
680 | if (!strcmp (old_section_names + OLD_SECTION_H(old_data_index).sh_name, | |
681 | ".data")) | |
682 | break; | |
683 | if (old_data_index == old_file_h->e_shnum) | |
684 | fatal ("Can't find .data in %s.\n", old_name, 0); | |
685 | ||
177c0ea7 | 686 | /* Walk through all section headers, insert the new data2 section right |
f1913a26 RS |
687 | before the new bss section. */ |
688 | for (n = 1, nn = 1; n < old_file_h->e_shnum; n++, nn++) | |
689 | { | |
690 | caddr_t src; | |
691 | ||
692 | if (n == old_sbss_index) | |
693 | ||
694 | /* If it is sbss section, insert the new data3 section before it. */ | |
695 | { | |
696 | /* Steal the data section header for this data3 section. */ | |
697 | if (!old_sdata_index) | |
698 | { | |
699 | memcpy (&NEW_SECTION_H(nn), &OLD_SECTION_H(old_data_index), | |
700 | new_file_h->e_shentsize); | |
177c0ea7 | 701 | |
f1913a26 RS |
702 | NEW_SECTION_H(nn).sh_addr = new_data3_addr; |
703 | NEW_SECTION_H(nn).sh_offset = new_data3_offset; | |
704 | NEW_SECTION_H(nn).sh_size = new_data3_size; | |
705 | NEW_SECTION_H(nn).sh_flags = OLD_SECTION_H(n).sh_flags; | |
706 | /* Use the sbss section's alignment. This will assure that the | |
707 | new data3 section always be placed in the same spot as the old | |
708 | sbss section by any other application. */ | |
709 | NEW_SECTION_H(nn).sh_addralign = OLD_SECTION_H(n).sh_addralign; | |
710 | ||
711 | /* Now copy over what we have in the memory now. */ | |
177c0ea7 JB |
712 | memcpy (NEW_SECTION_H(nn).sh_offset + new_base, |
713 | (caddr_t) OLD_SECTION_H(n).sh_addr, | |
f1913a26 RS |
714 | new_data3_size); |
715 | /* the new .data2 section should also come before the | |
716 | * new .sbss section */ | |
717 | nn += 2; | |
718 | } | |
719 | else | |
720 | { | |
721 | /* We always have a .sdata section: append the contents of the | |
722 | * old .sbss section. | |
723 | */ | |
177c0ea7 JB |
724 | memcpy (new_data3_offset + new_base, |
725 | (caddr_t) OLD_SECTION_H(n).sh_addr, | |
f1913a26 RS |
726 | new_data3_size); |
727 | nn ++; | |
728 | } | |
729 | } | |
730 | else if (n == old_bss_index) | |
177c0ea7 | 731 | |
f1913a26 RS |
732 | /* If it is bss section, insert the new data2 section before it. */ |
733 | { | |
734 | Elf32_Word tmp_align; | |
735 | Elf32_Addr tmp_addr; | |
736 | ||
737 | tmp_align = OLD_SECTION_H(n).sh_addralign; | |
738 | tmp_addr = OLD_SECTION_H(n).sh_addr; | |
739 | ||
740 | nn -= 2; | |
741 | /* Steal the data section header for this data2 section. */ | |
742 | memcpy (&NEW_SECTION_H(nn), &OLD_SECTION_H(old_data_index), | |
743 | new_file_h->e_shentsize); | |
177c0ea7 | 744 | |
f1913a26 RS |
745 | NEW_SECTION_H(nn).sh_addr = new_data2_addr; |
746 | NEW_SECTION_H(nn).sh_offset = new_data2_offset; | |
747 | NEW_SECTION_H(nn).sh_size = new_data2_size; | |
748 | /* Use the bss section's alignment. This will assure that the | |
749 | new data2 section always be placed in the same spot as the old | |
750 | bss section by any other application. */ | |
751 | NEW_SECTION_H(nn).sh_addralign = tmp_align; | |
752 | ||
753 | /* Now copy over what we have in the memory now. */ | |
177c0ea7 | 754 | memcpy (NEW_SECTION_H(nn).sh_offset + new_base, |
f1913a26 RS |
755 | (caddr_t) tmp_addr, new_data2_size); |
756 | nn += 2; | |
757 | } | |
177c0ea7 JB |
758 | |
759 | memcpy (&NEW_SECTION_H(nn), &OLD_SECTION_H(n), | |
f1913a26 | 760 | old_file_h->e_shentsize); |
177c0ea7 | 761 | |
f1913a26 RS |
762 | if (old_sdata_index && n == old_sdata_index) |
763 | /* The old .sdata section has now a new size */ | |
764 | NEW_SECTION_H(nn).sh_size = new_sdata_size; | |
765 | ||
766 | /* The new bss section's size is zero, and its file offset and virtual | |
767 | address should be off by NEW_DATA2_SIZE. */ | |
768 | if (n == old_sbss_index) | |
769 | { | |
770 | /* NN should be `old_sbss_index + 2' at this point. */ | |
771 | NEW_SECTION_H(nn).sh_offset += new_data2_size + new_data2_align + | |
772 | new_data3_size; | |
773 | NEW_SECTION_H(nn).sh_addr += new_data2_size + new_data2_align + | |
774 | new_data3_size; | |
775 | /* Let the new bss section address alignment be the same as the | |
177c0ea7 | 776 | section address alignment followed the old bss section, so |
f1913a26 RS |
777 | this section will be placed in exactly the same place. */ |
778 | NEW_SECTION_H(nn).sh_addralign = | |
779 | OLD_SECTION_H(nn + (old_sdata_index ? 1 : 0)).sh_addralign; | |
780 | NEW_SECTION_H(nn).sh_size = 0; | |
781 | } | |
782 | else if (n == old_bss_index) | |
783 | { | |
784 | /* NN should be `old_bss_index + 2' at this point. */ | |
785 | NEW_SECTION_H(nn).sh_offset += new_data2_size + new_data2_align + | |
786 | new_data3_size - old_bss_padding; | |
787 | NEW_SECTION_H(nn).sh_addr += new_data2_size; | |
788 | /* Let the new bss section address alignment be the same as the | |
177c0ea7 | 789 | section address alignment followed the old bss section, so |
f1913a26 RS |
790 | this section will be placed in exactly the same place. */ |
791 | NEW_SECTION_H(nn).sh_addralign = | |
792 | OLD_SECTION_H((nn - (old_sdata_index ? 0 : 1))).sh_addralign; | |
793 | NEW_SECTION_H(nn).sh_size = 0; | |
794 | } | |
795 | /* Any section that was original placed AFTER the bss section should now | |
796 | be off by NEW_DATA2_SIZE. */ | |
797 | else if (NEW_SECTION_H(nn).sh_offset >= new_data3_offset) | |
798 | NEW_SECTION_H(nn).sh_offset += new_data2_size + | |
799 | new_data2_align + | |
800 | new_data3_size - | |
801 | old_bss_padding; | |
177c0ea7 | 802 | |
f1913a26 | 803 | /* If any section hdr refers to the section after the new .data |
177c0ea7 | 804 | section, make it refer to next one because we have inserted |
f1913a26 | 805 | a new section in between. */ |
177c0ea7 | 806 | |
f1913a26 RS |
807 | PATCH_INDEX(NEW_SECTION_H(nn).sh_link); |
808 | PATCH_INDEX(NEW_SECTION_H(nn).sh_info); | |
177c0ea7 | 809 | |
f1913a26 RS |
810 | /* Now, start to copy the content of sections. */ |
811 | if (NEW_SECTION_H(nn).sh_type == SHT_NULL | |
812 | || NEW_SECTION_H(nn).sh_type == SHT_NOBITS) | |
813 | continue; | |
177c0ea7 | 814 | |
f1913a26 RS |
815 | /* Write out the sections. .data, .data1 and .sdata get copied from |
816 | * the current process instead of the old file. | |
817 | */ | |
818 | if (!strcmp (old_section_names + OLD_SECTION_H(n).sh_name, ".data") || | |
819 | !strcmp (old_section_names + OLD_SECTION_H(n).sh_name, ".data1") || | |
820 | (old_sdata_index && (n == old_sdata_index))) | |
821 | src = (caddr_t) OLD_SECTION_H(n).sh_addr; | |
822 | else | |
823 | src = old_base + OLD_SECTION_H(n).sh_offset; | |
177c0ea7 | 824 | |
f1913a26 RS |
825 | memcpy (NEW_SECTION_H(nn).sh_offset + new_base, src, |
826 | ((n == old_sdata_index) ? | |
827 | old_sdata_size : | |
828 | NEW_SECTION_H(nn).sh_size)); | |
829 | ||
830 | /* If it is the symbol table, its st_shndx field needs to be patched. */ | |
831 | if (NEW_SECTION_H(nn).sh_type == SHT_SYMTAB | |
832 | || NEW_SECTION_H(nn).sh_type == SHT_DYNSYM) | |
833 | { | |
834 | Elf32_Shdr *spt = &NEW_SECTION_H(nn); | |
835 | unsigned int num = spt->sh_size / spt->sh_entsize; | |
177c0ea7 | 836 | Elf32_Sym * sym = (Elf32_Sym *) (NEW_SECTION_H(nn).sh_offset + |
f1913a26 RS |
837 | new_base); |
838 | for (; num--; sym++) | |
839 | { | |
840 | if ((sym->st_shndx == SHN_UNDEF) | |
841 | || (sym->st_shndx == SHN_ABS) | |
842 | || (sym->st_shndx == SHN_COMMON)) | |
843 | continue; | |
177c0ea7 | 844 | |
f1913a26 RS |
845 | PATCH_INDEX(sym->st_shndx); |
846 | } | |
847 | } | |
848 | } | |
b6f8e806 GM |
849 | { |
850 | Elf32_Rel *rel_p; | |
851 | unsigned int old_data_addr_start; | |
852 | unsigned int old_data_addr_end; | |
853 | unsigned int old_data_offset; | |
854 | unsigned int new_data_offset; | |
855 | int i; | |
856 | ||
857 | rel_p = (Elf32_Rel *)OLD_SECTION_H(old_rel_dyn_index).sh_addr; | |
858 | old_data_addr_start = OLD_SECTION_H(old_data_index).sh_addr; | |
859 | old_data_addr_end = old_data_addr_start + | |
860 | OLD_SECTION_H(old_data_index).sh_size; | |
861 | old_data_offset = (int)OLD_SECTION_H(old_data_index).sh_offset + | |
862 | (unsigned int)old_base; | |
863 | new_data_offset = (int)NEW_SECTION_H(old_data_index).sh_offset + | |
864 | (unsigned int)new_base; | |
865 | ||
866 | #ifdef DEBUG | |
867 | fprintf(stderr, "old_data.sh_addr= 0x%08x ... 0x%08x\n", old_data_addr_start, | |
868 | old_data_addr_end); | |
869 | #endif /* DEBUG */ | |
870 | ||
871 | for (i = 0; i < old_rel_dyn_size/sizeof(Elf32_Rel); i++) | |
872 | { | |
873 | #ifdef DEBUG | |
874 | fprintf(stderr, ".rel.dyn offset= 0x%08x type= %d sym= %d\n", | |
875 | rel_p->r_offset, ELF32_R_TYPE(rel_p->r_info), ELF32_R_SYM(rel_p->r_info)); | |
876 | #endif /* DEBUG */ | |
877 | ||
878 | if (rel_p->r_offset) | |
879 | { | |
880 | unsigned int offset; | |
881 | ||
882 | assert(old_data_addr_start <= rel_p->r_offset && | |
883 | rel_p->r_offset <= old_data_addr_end); | |
884 | ||
885 | offset = rel_p->r_offset - old_data_addr_start; | |
886 | ||
887 | #ifdef DEBUG | |
888 | fprintf(stderr, "r_offset= 0x%08x *r_offset= 0x%08x\n", | |
889 | rel_p->r_offset, *((int *)(rel_p->r_offset))); | |
890 | fprintf(stderr, "old = 0x%08x *old =0x%08x\n", | |
891 | (old_data_offset + offset - (unsigned int)old_base), | |
892 | *((int *)(old_data_offset + offset))); | |
893 | fprintf(stderr, "new = 0x%08x *new =0x%08x\n", | |
894 | (new_data_offset + offset - (unsigned int)new_base), | |
895 | *((int *)(new_data_offset + offset))); | |
896 | #endif /* DEBUG */ | |
897 | ||
898 | *((int *)(new_data_offset + offset)) = *((int *)(old_data_offset + offset)); | |
899 | } | |
900 | ||
901 | rel_p++; | |
902 | } | |
903 | } | |
f1913a26 RS |
904 | |
905 | /* Close the files and make the new file executable */ | |
906 | ||
907 | if (close (old_file)) | |
908 | fatal ("Can't close(%s): errno %d\n", old_name, errno); | |
909 | ||
910 | if (close (new_file)) | |
911 | fatal ("Can't close(%s): errno %d\n", new_name, errno); | |
912 | ||
913 | if (stat (new_name, &stat_buf) == -1) | |
914 | fatal ("Can't stat(%s): errno %d\n", new_name, errno); | |
915 | ||
916 | n = umask (777); | |
917 | umask (n); | |
918 | stat_buf.st_mode |= 0111 & ~n; | |
919 | if (chmod (new_name, stat_buf.st_mode) == -1) | |
920 | fatal ("Can't chmod(%s): errno %d\n", new_name, errno); | |
921 | } | |
6b61353c KH |
922 | |
923 | /* arch-tag: c784ead3-7a27-442b-83fe-7af8d08654d3 | |
924 | (do not change this comment) */ |