Commit | Line | Data |
---|---|---|
b061d5f1 RS |
1 | /* Unexec for DEC alpha. schoepf@sc.ZIB-Berlin.DE (Rainer Schoepf). |
2 | ||
429ab54e | 3 | Copyright (C) 1994, 2000, 2001, 2002, 2003, 2004, |
8cabe764 | 4 | 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
b061d5f1 RS |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
b061d5f1 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
b061d5f1 RS |
12 | |
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 | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
b061d5f1 RS |
20 | |
21 | \f | |
22 | #include <config.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/file.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/mman.h> | |
27 | #include <stdio.h> | |
20fd0b4f DL |
28 | #include <errno.h> |
29 | #ifdef HAVE_STRING_H | |
30 | #include <string.h> | |
31 | #endif | |
61e63089 | 32 | #if !defined (__NetBSD__) && !defined (__OpenBSD__) |
b061d5f1 RS |
33 | #include <filehdr.h> |
34 | #include <aouthdr.h> | |
35 | #include <scnhdr.h> | |
36 | #include <syms.h> | |
d7b43eaa RS |
37 | #ifndef __linux__ |
38 | # include <reloc.h> | |
39 | # include <elf_abi.h> | |
40 | #endif | |
61e63089 | 41 | #else /* __NetBSD__ or __OpenBSD__ */ |
6538ee2e RS |
42 | /* |
43 | * NetBSD/Alpha does not have 'normal' user-land ECOFF support because | |
44 | * there's no desire to support ECOFF as the executable format in the | |
45 | * long term. | |
46 | */ | |
47 | #include <sys/exec_ecoff.h> | |
48 | ||
49 | /* Structures, constants, etc., that NetBSD defines strangely. */ | |
50 | #define filehdr ecoff_filehdr | |
51 | #define aouthdr ecoff_aouthdr | |
52 | #define scnhdr ecoff_scnhdr | |
53 | #define HDRR struct ecoff_symhdr | |
54 | #define pHDRR HDRR * | |
55 | #define cbHDRR sizeof(HDRR) | |
61e63089 RS |
56 | #ifdef __OpenBSD__ |
57 | #define ALPHAMAGIC ECOFF_MAGIC_NATIVE_ALPHA | |
58 | #else | |
6538ee2e | 59 | #define ALPHAMAGIC ECOFF_MAGIC_NETBSD_ALPHA |
61e63089 | 60 | #endif |
6538ee2e RS |
61 | #define ZMAGIC ECOFF_ZMAGIC |
62 | ||
63 | /* Misc. constants that NetBSD doesn't define at all. */ | |
64 | #define ALPHAUMAGIC 0617 | |
65 | #define _MIPS_NSCNS_MAX 35 | |
66 | #define STYP_TEXT 0x00000020 | |
67 | #define STYP_DATA 0x00000040 | |
68 | #define STYP_BSS 0x00000080 | |
69 | #define STYP_RDATA 0x00000100 | |
70 | #define STYP_SDATA 0x00000200 | |
71 | #define STYP_SBSS 0x00000400 | |
72 | #define STYP_INIT 0x80000000 | |
73 | #define _TEXT ".text" | |
74 | #define _DATA ".data" | |
75 | #define _BSS ".bss" | |
76 | #define _INIT ".init" | |
77 | #define _RDATA ".rdata" | |
78 | #define _SDATA ".sdata" | |
79 | #define _SBSS ".sbss" | |
61e63089 | 80 | #endif /* __NetBSD__ || __OpenBSD__ */ |
b061d5f1 | 81 | |
3fb21e7a DL |
82 | static void fatal_unexec __P ((char *, char *)); |
83 | static void mark_x __P ((char *)); | |
84 | ||
85 | static void update_dynamic_symbols __P ((char *, char *, int, struct aouthdr)); | |
b061d5f1 RS |
86 | |
87 | #define READ(_fd, _buffer, _size, _error_message, _error_arg) \ | |
88 | errno = EEOF; \ | |
89 | if (read (_fd, _buffer, _size) != _size) \ | |
90 | fatal_unexec (_error_message, _error_arg); | |
91 | ||
92 | #define WRITE(_fd, _buffer, _size, _error_message, _error_arg) \ | |
93 | if (write (_fd, _buffer, _size) != _size) \ | |
94 | fatal_unexec (_error_message, _error_arg); | |
95 | ||
96 | #define SEEK(_fd, _position, _error_message, _error_arg) \ | |
97 | errno = EEOF; \ | |
98 | if (lseek (_fd, _position, L_SET) != _position) \ | |
99 | fatal_unexec (_error_message, _error_arg); | |
100 | ||
20fd0b4f DL |
101 | #ifdef HAVE_UNISTD_H |
102 | #include <unistd.h> | |
103 | #else | |
d7b43eaa | 104 | void *sbrk (); |
20fd0b4f | 105 | #endif |
b061d5f1 RS |
106 | |
107 | #define EEOF -1 | |
108 | ||
109 | static struct scnhdr *text_section; | |
d7b43eaa RS |
110 | static struct scnhdr *rel_dyn_section; |
111 | static struct scnhdr *dynstr_section; | |
112 | static struct scnhdr *dynsym_section; | |
b061d5f1 RS |
113 | static struct scnhdr *init_section; |
114 | static struct scnhdr *finit_section; | |
115 | static struct scnhdr *rdata_section; | |
866fc66a | 116 | static struct scnhdr *rconst_section; |
b061d5f1 RS |
117 | static struct scnhdr *data_section; |
118 | static struct scnhdr *pdata_section; | |
119 | static struct scnhdr *xdata_section; | |
120 | static struct scnhdr *got_section; | |
121 | static struct scnhdr *lit8_section; | |
122 | static struct scnhdr *lit4_section; | |
123 | static struct scnhdr *sdata_section; | |
124 | static struct scnhdr *sbss_section; | |
125 | static struct scnhdr *bss_section; | |
126 | ||
d7b43eaa RS |
127 | static struct scnhdr old_data_scnhdr; |
128 | ||
866fc66a | 129 | static unsigned long Brk; |
b061d5f1 RS |
130 | |
131 | struct headers { | |
132 | struct filehdr fhdr; | |
133 | struct aouthdr aout; | |
134 | struct scnhdr section[_MIPS_NSCNS_MAX]; | |
135 | }; | |
136 | ||
137 | ||
138 | ||
139 | /* Define name of label for entry point for the dumped executable. */ | |
140 | ||
141 | #ifndef DEFAULT_ENTRY_ADDRESS | |
142 | #define DEFAULT_ENTRY_ADDRESS __start | |
143 | #endif | |
144 | \f | |
3fb21e7a | 145 | void |
b061d5f1 RS |
146 | unexec (new_name, a_name, data_start, bss_start, entry_address) |
147 | char *new_name, *a_name; | |
148 | unsigned long data_start, bss_start, entry_address; | |
149 | { | |
150 | int new, old; | |
151 | char * oldptr; | |
152 | struct headers ohdr, nhdr; | |
153 | struct stat stat; | |
154 | long pagesize, brk; | |
155 | long newsyms, symrel; | |
156 | int nread; | |
157 | int i; | |
158 | long vaddr, scnptr; | |
159 | #define BUFSIZE 8192 | |
160 | char buffer[BUFSIZE]; | |
161 | ||
162 | if ((old = open (a_name, O_RDONLY)) < 0) | |
163 | fatal_unexec ("opening %s", a_name); | |
164 | ||
165 | new = creat (new_name, 0666); | |
166 | if (new < 0) fatal_unexec ("creating %s", new_name); | |
167 | ||
168 | if ((fstat (old, &stat) == -1)) | |
169 | fatal_unexec ("fstat %s", a_name); | |
170 | ||
171 | oldptr = (char *)mmap (0, stat.st_size, PROT_READ, MAP_FILE|MAP_SHARED, old, 0); | |
172 | ||
173 | if (oldptr == (char *)-1) | |
174 | fatal_unexec ("mmap %s", a_name); | |
175 | ||
176 | close (old); | |
177 | ||
178 | /* This is a copy of the a.out header of the original executable */ | |
179 | ||
180 | ohdr = (*(struct headers *)oldptr); | |
181 | ||
182 | /* This is where we build the new header from the in-memory copy */ | |
183 | ||
184 | nhdr = *((struct headers *)TEXT_START); | |
185 | ||
186 | /* First do some consistency checks */ | |
187 | ||
188 | if (nhdr.fhdr.f_magic != ALPHAMAGIC | |
189 | && nhdr.fhdr.f_magic != ALPHAUMAGIC) | |
190 | { | |
191 | fprintf (stderr, "unexec: input file magic number is %x, not %x or %x.\n", | |
192 | nhdr.fhdr.f_magic, ALPHAMAGIC, ALPHAUMAGIC); | |
193 | exit (1); | |
194 | } | |
195 | ||
196 | if (nhdr.fhdr.f_opthdr != sizeof (nhdr.aout)) | |
197 | { | |
198 | fprintf (stderr, "unexec: input a.out header is %d bytes, not %d.\n", | |
0c08e6df | 199 | nhdr.fhdr.f_opthdr, (int)sizeof (nhdr.aout)); |
b061d5f1 RS |
200 | exit (1); |
201 | } | |
202 | if (nhdr.aout.magic != ZMAGIC) | |
203 | { | |
204 | fprintf (stderr, "unexec: input file a.out magic number is %o, not %o.\n", | |
205 | nhdr.aout.magic, ZMAGIC); | |
206 | exit (1); | |
207 | } | |
208 | ||
209 | ||
210 | /* Now check the existence of certain header section and grab | |
211 | their addresses. */ | |
212 | ||
213 | #define CHECK_SCNHDR(ptr, name, flags) \ | |
214 | ptr = NULL; \ | |
215 | for (i = 0; i < nhdr.fhdr.f_nscns && !ptr; i++) \ | |
d7b43eaa | 216 | if (strncmp (nhdr.section[i].s_name, name, 8) == 0) \ |
b061d5f1 RS |
217 | { \ |
218 | if (nhdr.section[i].s_flags != flags) \ | |
219 | fprintf (stderr, "unexec: %x flags (%x expected) in %s section.\n", \ | |
220 | nhdr.section[i].s_flags, flags, name); \ | |
221 | ptr = nhdr.section + i; \ | |
222 | } \ | |
223 | ||
224 | CHECK_SCNHDR (text_section, _TEXT, STYP_TEXT); | |
225 | CHECK_SCNHDR (init_section, _INIT, STYP_INIT); | |
d7b43eaa RS |
226 | #ifdef _REL_DYN |
227 | CHECK_SCNHDR (rel_dyn_section, _REL_DYN, STYP_REL_DYN); | |
228 | #endif /* _REL_DYN */ | |
229 | #ifdef _DYNSYM | |
230 | CHECK_SCNHDR (dynsym_section, _DYNSYM, STYP_DYNSYM); | |
231 | #endif /* _REL_DYN */ | |
232 | #ifdef _DYNSTR | |
233 | CHECK_SCNHDR (dynstr_section, _DYNSTR, STYP_DYNSTR); | |
234 | #endif /* _REL_DYN */ | |
b061d5f1 RS |
235 | #ifdef _FINI |
236 | CHECK_SCNHDR (finit_section, _FINI, STYP_FINI); | |
237 | #endif /* _FINI */ | |
238 | CHECK_SCNHDR (rdata_section, _RDATA, STYP_RDATA); | |
866fc66a RS |
239 | #ifdef _RCONST |
240 | CHECK_SCNHDR (rconst_section, _RCONST, STYP_RCONST); | |
241 | #endif | |
b061d5f1 RS |
242 | #ifdef _PDATA |
243 | CHECK_SCNHDR (pdata_section, _PDATA, STYP_PDATA); | |
20fd0b4f | 244 | #endif /* _PDATA */ |
b061d5f1 RS |
245 | #ifdef _GOT |
246 | CHECK_SCNHDR (got_section, _GOT, STYP_GOT); | |
20fd0b4f | 247 | #endif /* _GOT */ |
b061d5f1 RS |
248 | CHECK_SCNHDR (data_section, _DATA, STYP_DATA); |
249 | #ifdef _XDATA | |
250 | CHECK_SCNHDR (xdata_section, _XDATA, STYP_XDATA); | |
251 | #endif /* _XDATA */ | |
252 | #ifdef _LIT8 | |
253 | CHECK_SCNHDR (lit8_section, _LIT8, STYP_LIT8); | |
254 | CHECK_SCNHDR (lit4_section, _LIT4, STYP_LIT4); | |
255 | #endif /* _LIT8 */ | |
256 | CHECK_SCNHDR (sdata_section, _SDATA, STYP_SDATA); | |
257 | CHECK_SCNHDR (sbss_section, _SBSS, STYP_SBSS); | |
258 | CHECK_SCNHDR (bss_section, _BSS, STYP_BSS); | |
b061d5f1 RS |
259 | |
260 | ||
261 | pagesize = getpagesize (); | |
262 | brk = (((long) (sbrk (0))) + pagesize - 1) & (-pagesize); | |
263 | ||
264 | /* Remember the current break */ | |
265 | ||
266 | Brk = brk; | |
267 | ||
d7b43eaa RS |
268 | bcopy (data_section, &old_data_scnhdr, sizeof (old_data_scnhdr)); |
269 | ||
b061d5f1 RS |
270 | nhdr.aout.dsize = brk - DATA_START; |
271 | nhdr.aout.bsize = 0; | |
272 | if (entry_address == 0) | |
273 | { | |
274 | extern DEFAULT_ENTRY_ADDRESS (); | |
275 | nhdr.aout.entry = (unsigned long)DEFAULT_ENTRY_ADDRESS; | |
276 | } | |
277 | else | |
278 | nhdr.aout.entry = entry_address; | |
279 | ||
280 | nhdr.aout.bss_start = nhdr.aout.data_start + nhdr.aout.dsize; | |
b061d5f1 | 281 | |
866fc66a RS |
282 | if (rdata_section != NULL) |
283 | { | |
284 | rdata_section->s_size = data_start - DATA_START; | |
285 | ||
286 | /* Adjust start and virtual addresses of rdata_section, too. */ | |
287 | rdata_section->s_vaddr = DATA_START; | |
288 | rdata_section->s_paddr = DATA_START; | |
289 | rdata_section->s_scnptr = text_section->s_scnptr + nhdr.aout.tsize; | |
290 | } | |
b061d5f1 RS |
291 | |
292 | data_section->s_vaddr = data_start; | |
293 | data_section->s_paddr = data_start; | |
294 | data_section->s_size = brk - data_start; | |
866fc66a RS |
295 | |
296 | if (rdata_section != NULL) | |
297 | { | |
298 | data_section->s_scnptr = rdata_section->s_scnptr + rdata_section->s_size; | |
299 | } | |
300 | ||
b061d5f1 RS |
301 | vaddr = data_section->s_vaddr + data_section->s_size; |
302 | scnptr = data_section->s_scnptr + data_section->s_size; | |
303 | if (lit8_section != NULL) | |
304 | { | |
305 | lit8_section->s_vaddr = vaddr; | |
306 | lit8_section->s_paddr = vaddr; | |
307 | lit8_section->s_size = 0; | |
308 | lit8_section->s_scnptr = scnptr; | |
309 | } | |
310 | if (lit4_section != NULL) | |
311 | { | |
312 | lit4_section->s_vaddr = vaddr; | |
313 | lit4_section->s_paddr = vaddr; | |
314 | lit4_section->s_size = 0; | |
315 | lit4_section->s_scnptr = scnptr; | |
316 | } | |
317 | if (sdata_section != NULL) | |
318 | { | |
319 | sdata_section->s_vaddr = vaddr; | |
320 | sdata_section->s_paddr = vaddr; | |
321 | sdata_section->s_size = 0; | |
322 | sdata_section->s_scnptr = scnptr; | |
323 | } | |
324 | #ifdef _XDATA | |
325 | if (xdata_section != NULL) | |
326 | { | |
327 | xdata_section->s_vaddr = vaddr; | |
328 | xdata_section->s_paddr = vaddr; | |
329 | xdata_section->s_size = 0; | |
330 | xdata_section->s_scnptr = scnptr; | |
331 | } | |
332 | #endif | |
333 | #ifdef _GOT | |
334 | if (got_section != NULL) | |
335 | { | |
7d713448 RS |
336 | bcopy (got_section, buffer, sizeof (struct scnhdr)); |
337 | ||
b061d5f1 RS |
338 | got_section->s_vaddr = vaddr; |
339 | got_section->s_paddr = vaddr; | |
340 | got_section->s_size = 0; | |
341 | got_section->s_scnptr = scnptr; | |
342 | } | |
343 | #endif /*_GOT */ | |
344 | if (sbss_section != NULL) | |
345 | { | |
346 | sbss_section->s_vaddr = vaddr; | |
347 | sbss_section->s_paddr = vaddr; | |
348 | sbss_section->s_size = 0; | |
349 | sbss_section->s_scnptr = scnptr; | |
350 | } | |
351 | if (bss_section != NULL) | |
352 | { | |
353 | bss_section->s_vaddr = vaddr; | |
354 | bss_section->s_paddr = vaddr; | |
355 | bss_section->s_size = 0; | |
356 | bss_section->s_scnptr = scnptr; | |
357 | } | |
358 | ||
359 | WRITE (new, (char *)TEXT_START, nhdr.aout.tsize, | |
360 | "writing text section to %s", new_name); | |
361 | WRITE (new, (char *)DATA_START, nhdr.aout.dsize, | |
362 | "writing data section to %s", new_name); | |
363 | ||
7d713448 RS |
364 | #ifdef _GOT |
365 | #define old_got_section ((struct scnhdr *)buffer) | |
366 | ||
367 | if (got_section != NULL) | |
368 | { | |
369 | SEEK (new, old_got_section->s_scnptr, | |
370 | "seeking to start of got_section in %s", new_name); | |
371 | WRITE (new, oldptr + old_got_section->s_scnptr, old_got_section->s_size, | |
372 | "writing new got_section of %s", new_name); | |
373 | SEEK (new, nhdr.aout.tsize + nhdr.aout.dsize, | |
374 | "seeking to end of data section of %s", new_name); | |
375 | } | |
376 | ||
377 | #undef old_got_section | |
378 | #endif | |
b061d5f1 RS |
379 | |
380 | /* | |
381 | * Construct new symbol table header | |
382 | */ | |
383 | ||
384 | bcopy (oldptr + nhdr.fhdr.f_symptr, buffer, cbHDRR); | |
385 | ||
386 | #define symhdr ((pHDRR)buffer) | |
387 | newsyms = nhdr.aout.tsize + nhdr.aout.dsize; | |
388 | symrel = newsyms - nhdr.fhdr.f_symptr; | |
389 | nhdr.fhdr.f_symptr = newsyms; | |
390 | symhdr->cbLineOffset += symrel; | |
391 | symhdr->cbDnOffset += symrel; | |
392 | symhdr->cbPdOffset += symrel; | |
393 | symhdr->cbSymOffset += symrel; | |
394 | symhdr->cbOptOffset += symrel; | |
395 | symhdr->cbAuxOffset += symrel; | |
396 | symhdr->cbSsOffset += symrel; | |
397 | symhdr->cbSsExtOffset += symrel; | |
398 | symhdr->cbFdOffset += symrel; | |
399 | symhdr->cbRfdOffset += symrel; | |
400 | symhdr->cbExtOffset += symrel; | |
401 | ||
402 | WRITE (new, buffer, cbHDRR, "writing symbol table header of %s", new_name); | |
403 | ||
404 | /* | |
405 | * Copy the symbol table and line numbers | |
406 | */ | |
407 | WRITE (new, oldptr + ohdr.fhdr.f_symptr + cbHDRR, | |
408 | stat.st_size - ohdr.fhdr.f_symptr - cbHDRR, | |
409 | "writing symbol table of %s", new_name); | |
410 | ||
6ca5cfd1 RS |
411 | #ifdef _REL_DYN |
412 | if (rel_dyn_section) | |
413 | update_dynamic_symbols (oldptr, new_name, new, nhdr.aout); | |
414 | #endif | |
b061d5f1 RS |
415 | |
416 | #undef symhdr | |
417 | ||
418 | SEEK (new, 0, "seeking to start of header in %s", new_name); | |
419 | WRITE (new, &nhdr, sizeof (nhdr), | |
420 | "writing header of %s", new_name); | |
421 | ||
422 | close (old); | |
423 | close (new); | |
424 | mark_x (new_name); | |
425 | } | |
426 | ||
427 | ||
3fb21e7a | 428 | static void |
d7b43eaa | 429 | update_dynamic_symbols (old, new_name, new, aout) |
866fc66a RS |
430 | char *old; /* Pointer to old executable */ |
431 | char *new_name; /* Name of new executable */ | |
432 | int new; /* File descriptor for new executable */ | |
d7b43eaa | 433 | struct aouthdr aout; /* a.out info from the file header */ |
b061d5f1 | 434 | { |
61e63089 | 435 | #if !defined (__linux__) && !defined (__NetBSD__) && !defined (__OpenBSD__) |
54dfb86c | 436 | |
d7b43eaa RS |
437 | typedef struct dynrel_info { |
438 | char * addr; | |
439 | unsigned type:8; | |
440 | unsigned index:24; | |
441 | unsigned info:8; | |
442 | unsigned pad:8; | |
443 | } dr_info; | |
444 | ||
445 | int nsyms = rel_dyn_section->s_size / sizeof (struct dynrel_info); | |
446 | int i; | |
447 | dr_info * rd_base = (dr_info *) (old + rel_dyn_section->s_scnptr); | |
448 | Elf32_Sym * ds_base = (Elf32_Sym *) (old + dynsym_section->s_scnptr); | |
b061d5f1 | 449 | |
d7b43eaa RS |
450 | for (i = 0; i < nsyms; i++) { |
451 | register Elf32_Sym x; | |
b061d5f1 | 452 | |
d7b43eaa RS |
453 | if (rd_base[i].index == 0) |
454 | continue; | |
b061d5f1 | 455 | |
d7b43eaa RS |
456 | x = ds_base[rd_base[i].index]; |
457 | ||
458 | #if 0 | |
459 | fprintf (stderr, "Object inspected: %s, addr = %lx, shndx = %x", | |
460 | old + dynstr_section->s_scnptr + x.st_name, rd_base[i].addr, x.st_shndx); | |
461 | #endif | |
462 | ||
463 | ||
464 | if ((ELF32_ST_BIND (x.st_info) == STB_GLOBAL) | |
465 | && (x.st_shndx == 0) | |
466 | /* && (x.st_value == NULL) */ | |
467 | ) { | |
468 | /* OK, this is probably a reference to an object in a shared | |
469 | library, so copy the old value. This is done in several steps: | |
470 | 1. reladdr is the address of the location in question relative to | |
471 | the start of the data section, | |
472 | 2. oldref is the addr is the mapped in temacs executable, | |
473 | 3. newref is the address of the location in question in the | |
474 | undumped executable, | |
475 | 4. len is the size of the object reference in bytes -- | |
476 | currently only 4 (long) and 8 (quad) are supported. | |
477 | */ | |
2881ec96 | 478 | register unsigned long reladdr = (long)rd_base[i].addr - old_data_scnhdr.s_vaddr; |
d7b43eaa RS |
479 | char * oldref = old + old_data_scnhdr.s_scnptr + reladdr; |
480 | unsigned long newref = aout.tsize + reladdr; | |
481 | int len; | |
482 | ||
483 | #if 0 | |
484 | fprintf (stderr, "...relocated\n"); | |
485 | #endif | |
486 | ||
177c0ea7 | 487 | if (rd_base[i].type == R_REFLONG) |
d7b43eaa | 488 | len = 4; |
177c0ea7 | 489 | else if (rd_base[i].type == R_REFQUAD) |
d7b43eaa RS |
490 | len = 8; |
491 | else | |
4042a81a | 492 | fatal_unexec ("unrecognized relocation type in .dyn.rel section (symbol #%d)", (char *) i); |
d7b43eaa RS |
493 | |
494 | SEEK (new, newref, "seeking to dynamic symbol in %s", new_name); | |
495 | WRITE (new, oldref, len, "writing old dynrel info in %s", new_name); | |
b061d5f1 RS |
496 | } |
497 | ||
d7b43eaa RS |
498 | #if 0 |
499 | else | |
500 | fprintf (stderr, "...not relocated\n"); | |
501 | #endif | |
502 | ||
503 | } | |
504 | ||
61e63089 | 505 | #endif /* not __linux__ and not __NetBSD__ and not __OpenBSD__ */ |
b061d5f1 RS |
506 | } |
507 | ||
b061d5f1 RS |
508 | \f |
509 | /* | |
510 | * mark_x | |
511 | * | |
512 | * After successfully building the new a.out, mark it executable | |
513 | */ | |
514 | ||
515 | static void | |
516 | mark_x (name) | |
517 | char *name; | |
518 | { | |
519 | struct stat sbuf; | |
520 | int um = umask (777); | |
521 | umask (um); | |
522 | if (stat (name, &sbuf) < 0) | |
523 | fatal_unexec ("getting protection on %s", name); | |
524 | sbuf.st_mode |= 0111 & ~um; | |
525 | if (chmod (name, sbuf.st_mode) < 0) | |
526 | fatal_unexec ("setting protection on %s", name); | |
527 | } | |
528 | ||
529 | static void | |
a084ed10 RS |
530 | fatal_unexec (s, arg) |
531 | char *s; | |
532 | char *arg; | |
b061d5f1 | 533 | { |
b061d5f1 RS |
534 | if (errno == EEOF) |
535 | fputs ("unexec: unexpected end of file, ", stderr); | |
536 | else | |
537 | fprintf (stderr, "unexec: %s, ", strerror (errno)); | |
a084ed10 | 538 | fprintf (stderr, s, arg); |
b061d5f1 RS |
539 | fputs (".\n", stderr); |
540 | exit (1); | |
541 | } | |
ab5796a9 MB |
542 | |
543 | /* arch-tag: 46316c49-ee08-4aa3-942b-00798902f5bd | |
544 | (do not change this comment) */ |