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1 | /* Collect static initialization info into data structures | |
2 | that can be traversed by C++ initialization and finalization | |
3 | routines. | |
4 | ||
5 | Copyright (C) 1992 Free Software Foundation, Inc. | |
6 | Contributed by Chris Smith (csmith@convex.com). | |
7 | Heavily modified by Michael Meissner (meissner@osf.org), | |
8 | Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com). | |
9 | ||
10 | This file is part of GNU CC. | |
11 | ||
12 | GNU CC is free software; you can redistribute it and/or modify | |
13 | it under the terms of the GNU General Public License as published by | |
14 | the Free Software Foundation; either version 2, or (at your option) | |
15 | any later version. | |
16 | ||
17 | GNU CC is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with GNU CC; see the file COPYING. If not, write to | |
24 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
25 | ||
26 | ||
27 | /* Build tables of static constructors and destructors and run ld. */ | |
28 | ||
29 | #include <sys/types.h> | |
30 | #include <stdio.h> | |
31 | #include <ctype.h> | |
32 | #include <errno.h> | |
33 | #include <signal.h> | |
34 | #include <sys/file.h> | |
35 | #include <sys/stat.h> | |
36 | #ifdef NO_WAIT_H | |
37 | #include <sys/wait.h> | |
38 | #endif | |
39 | ||
40 | #ifndef errno | |
41 | extern int errno; | |
42 | #endif | |
43 | ||
44 | #define COLLECT | |
45 | ||
46 | #include "config.h" | |
47 | ||
48 | #ifndef __STDC__ | |
49 | #define generic char | |
50 | #define const | |
51 | ||
52 | #else | |
53 | #define generic void | |
54 | #endif | |
55 | ||
56 | #ifdef USG | |
57 | #define vfork fork | |
58 | #endif | |
59 | ||
60 | #ifndef R_OK | |
61 | #define R_OK 4 | |
62 | #define W_OK 2 | |
63 | #define X_OK 1 | |
64 | #endif | |
65 | ||
66 | /* On MSDOS, write temp files in current dir | |
67 | because there's no place else we can expect to use. */ | |
68 | #if __MSDOS__ | |
69 | #ifndef P_tmpdir | |
70 | #define P_tmpdir "./" | |
71 | #endif | |
72 | #endif | |
73 | \f | |
74 | /* On certain systems, we have code that works by scanning the object file | |
75 | directly. But this code uses system-specific header files and library | |
76 | functions, so turn it off in a cross-compiler. Likewise, the names of | |
77 | the utilities aren't correct for a cross-compiler; we have to hope that | |
78 | cross-versions are in the proper directories. */ | |
79 | ||
80 | #ifdef CROSS_COMPILE | |
81 | #undef OBJECT_FORMAT_COFF | |
82 | #undef OBJECT_FORMAT_ROSE | |
83 | #undef MD_EXEC_PREFIX | |
84 | #undef REAL_LD_FILE_NAME | |
85 | #undef REAL_NM_FILE_NAME | |
86 | #undef REAL_STRIP_FILE_NAME | |
87 | #endif | |
88 | ||
89 | /* If we can't use a special method, use the ordinary one: | |
90 | run nm to find what symbols are present. | |
91 | In a cross-compiler, this means you need a cross nm, | |
92 | but that isn't quite as unpleasant as special headers. */ | |
93 | ||
94 | #if !defined (OBJECT_FORMAT_COFF) && !defined (OBJECT_FORMAT_ROSE) | |
95 | #define OBJECT_FORMAT_NONE | |
96 | #endif | |
97 | ||
98 | #ifdef OBJECT_FORMAT_COFF | |
99 | ||
100 | #include <a.out.h> | |
101 | #include <ar.h> | |
102 | ||
103 | #ifdef UMAX | |
104 | #include <sgs.h> | |
105 | #endif | |
106 | ||
107 | /* Many versions of ldfcn.h define these. */ | |
108 | #ifdef FREAD | |
109 | #undef FREAD | |
110 | #undef FWRITE | |
111 | #endif | |
112 | ||
113 | #include <ldfcn.h> | |
114 | ||
115 | /* Some systems have an ISCOFF macro, but others do not. In some cases | |
116 | the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines | |
117 | that either do not have an ISCOFF macro in /usr/include or for those | |
118 | where it is wrong. */ | |
119 | ||
120 | #ifndef MY_ISCOFF | |
121 | #define MY_ISCOFF(X) ISCOFF (X) | |
122 | #endif | |
123 | ||
124 | #endif /* OBJECT_FORMAT_COFF */ | |
125 | ||
126 | #ifdef OBJECT_FORMAT_ROSE | |
127 | ||
128 | #ifdef _OSF_SOURCE | |
129 | #define USE_MMAP | |
130 | #endif | |
131 | ||
132 | #ifdef USE_MMAP | |
133 | #include <sys/mman.h> | |
134 | #endif | |
135 | ||
136 | #include <unistd.h> | |
137 | #include <mach_o_format.h> | |
138 | #include <mach_o_header.h> | |
139 | #include <mach_o_vals.h> | |
140 | #include <mach_o_types.h> | |
141 | ||
142 | #endif /* OBJECT_FORMAT_ROSE */ | |
143 | ||
144 | #ifdef OBJECT_FORMAT_NONE | |
145 | ||
146 | /* Default flags to pass to nm. */ | |
147 | #ifndef NM_FLAGS | |
148 | #define NM_FLAGS "-p" | |
149 | #endif | |
150 | ||
151 | #endif /* OBJECT_FORMAT_NONE */ | |
152 | \f | |
153 | /* Linked lists of constructor and destructor names. */ | |
154 | ||
155 | struct id | |
156 | { | |
157 | struct id *next; | |
158 | int sequence; | |
159 | char name[1]; | |
160 | }; | |
161 | ||
162 | struct head | |
163 | { | |
164 | struct id *first; | |
165 | struct id *last; | |
166 | int number; | |
167 | }; | |
168 | ||
169 | /* Enumeration giving which pass this is for scanning the program file. */ | |
170 | ||
171 | enum pass { | |
172 | PASS_FIRST, /* without constructors */ | |
173 | PASS_SECOND /* with constructors linked in */ | |
174 | }; | |
175 | ||
176 | #ifndef NO_SYS_SIGLIST | |
177 | extern char *sys_siglist[]; | |
178 | #endif | |
179 | extern char *version_string; | |
180 | ||
181 | static int vflag; /* true if -v */ | |
182 | static int rflag; /* true if -r */ | |
183 | static int strip_flag; /* true if -s */ | |
184 | ||
185 | static int debug; /* true if -debug */ | |
186 | ||
187 | static int temp_filename_length; /* Length of temp_filename */ | |
188 | static char *temp_filename; /* Base of temp filenames */ | |
189 | static char *c_file; /* <xxx>.c for constructor/destructor list. */ | |
190 | static char *o_file; /* <xxx>.o for constructor/destructor list. */ | |
191 | static char *output_file; /* Output file for ld. */ | |
192 | static char *nm_file_name; /* pathname of nm */ | |
193 | static char *strip_file_name; /* pathname of strip */ | |
194 | ||
195 | static struct head constructors; /* list of constructors found */ | |
196 | static struct head destructors; /* list of destructors found */ | |
197 | ||
198 | extern char *getenv (); | |
199 | extern char *mktemp (); | |
200 | static void add_to_list (); | |
201 | static void scan_prog_file (); | |
202 | static void fork_execute (); | |
203 | static void do_wait (); | |
204 | static void write_c_file (); | |
205 | static void my_exit (); | |
206 | static void handler (); | |
207 | static void maybe_unlink (); | |
208 | static void choose_temp_base (); | |
209 | ||
210 | generic *xcalloc (); | |
211 | generic *xmalloc (); | |
212 | ||
213 | extern char *index (); | |
214 | extern char *rindex (); | |
215 | \f | |
216 | #ifdef NO_DUP2 | |
217 | dup2 (oldfd, newfd) | |
218 | int oldfd; | |
219 | int newfd; | |
220 | { | |
221 | int fdtmp[256]; | |
222 | int fdx = 0; | |
223 | int fd; | |
224 | ||
225 | if (oldfd == newfd) | |
226 | return 0; | |
227 | close (newfd); | |
228 | while ((fd = dup (oldfd)) != newfd) /* good enough for low fd's */ | |
229 | fdtmp[fdx++] = fd; | |
230 | while (fdx > 0) | |
231 | close (fdtmp[--fdx]); | |
232 | } | |
233 | #endif | |
234 | ||
235 | char * | |
236 | my_strerror (e) | |
237 | int e; | |
238 | { | |
239 | extern char *sys_errlist[]; | |
240 | extern int sys_nerr; | |
241 | static char buffer[30]; | |
242 | ||
243 | if (!e) | |
244 | return ""; | |
245 | ||
246 | if (e > 0 && e < sys_nerr) | |
247 | return sys_errlist[e]; | |
248 | ||
249 | sprintf (buffer, "Unknown error %d", e); | |
250 | return buffer; | |
251 | } | |
252 | \f | |
253 | /* Delete tempfiles and exit function. */ | |
254 | ||
255 | static void | |
256 | my_exit (status) | |
257 | int status; | |
258 | { | |
259 | if (c_file != 0 && c_file[0]) | |
260 | maybe_unlink (c_file); | |
261 | ||
262 | if (o_file != 0 && o_file[0]) | |
263 | maybe_unlink (o_file); | |
264 | ||
265 | if (status != 0 && output_file != 0 && output_file[0]) | |
266 | maybe_unlink (output_file); | |
267 | ||
268 | exit (status); | |
269 | } | |
270 | ||
271 | \f | |
272 | /* Die when sys call fails. */ | |
273 | ||
274 | static void | |
275 | fatal_perror (string, arg1, arg2, arg3) | |
276 | char *string; | |
277 | { | |
278 | int e = errno; | |
279 | ||
280 | fprintf (stderr, "collect: "); | |
281 | fprintf (stderr, string, arg1, arg2, arg3); | |
282 | fprintf (stderr, ": %s\n", my_strerror (e)); | |
283 | my_exit (1); | |
284 | } | |
285 | ||
286 | /* Just die. */ | |
287 | ||
288 | static void | |
289 | fatal (string, arg1, arg2, arg3) | |
290 | char *string; | |
291 | { | |
292 | fprintf (stderr, "collect: "); | |
293 | fprintf (stderr, string, arg1, arg2, arg3); | |
294 | fprintf (stderr, "\n"); | |
295 | my_exit (1); | |
296 | } | |
297 | ||
298 | /* Write error message. */ | |
299 | ||
300 | static void | |
301 | error (string, arg1, arg2, arg3, arg4) | |
302 | char *string; | |
303 | { | |
304 | fprintf (stderr, "collect: "); | |
305 | fprintf (stderr, string, arg1, arg2, arg3, arg4); | |
306 | fprintf (stderr, "\n"); | |
307 | } | |
308 | ||
309 | /* In case obstack is linked in, and abort is defined to fancy_abort, | |
310 | provide a default entry. */ | |
311 | ||
312 | void | |
313 | fancy_abort () | |
314 | { | |
315 | fatal ("internal error"); | |
316 | } | |
317 | ||
318 | \f | |
319 | static void | |
320 | handler (signo) | |
321 | int signo; | |
322 | { | |
323 | if (c_file[0]) | |
324 | maybe_unlink (c_file); | |
325 | ||
326 | if (o_file[0]) | |
327 | maybe_unlink (o_file); | |
328 | ||
329 | signal (signo, SIG_DFL); | |
330 | kill (getpid (), signo); | |
331 | } | |
332 | ||
333 | \f | |
334 | generic * | |
335 | xcalloc (size1, size2) | |
336 | int size1, size2; | |
337 | { | |
338 | generic *ptr = (generic *) calloc (size1, size2); | |
339 | if (ptr) | |
340 | return ptr; | |
341 | ||
342 | fatal ("out of memory"); | |
343 | return (generic *)0; | |
344 | } | |
345 | ||
346 | generic * | |
347 | xmalloc (size) | |
348 | int size; | |
349 | { | |
350 | generic *ptr = (generic *) malloc (size); | |
351 | if (ptr) | |
352 | return ptr; | |
353 | ||
354 | fatal ("out of memory"); | |
355 | return (generic *)0; | |
356 | } | |
357 | ||
358 | /* Make a copy of a string INPUT with size SIZE. */ | |
359 | ||
360 | char * | |
361 | savestring (input, size) | |
362 | char *input; | |
363 | int size; | |
364 | { | |
365 | char *output = (char *) xmalloc (size + 1); | |
366 | bcopy (input, output, size); | |
367 | output[size] = 0; | |
368 | return output; | |
369 | } | |
370 | \f | |
371 | /* Decide whether the given symbol is: | |
372 | a constructor (1), a destructor (2), or neither (0). */ | |
373 | ||
374 | static int | |
375 | is_ctor_dtor (s) | |
376 | char *s; | |
377 | { | |
378 | struct names { char *name; int len; int ret; int two_underscores; }; | |
379 | ||
380 | register struct names *p; | |
381 | register int ch; | |
382 | register char *orig_s = s; | |
383 | ||
384 | static struct names special[] = { | |
385 | #ifdef NO_DOLLAR_IN_LABEL | |
386 | #ifdef NO_DOT_IN_LABEL | |
387 | { "___GLOBAL__I_", sizeof ("___GLOBAL__I_")-1, 1, 0 }, | |
388 | { "___GLOBAL__D_", sizeof ("___GLOBAL__D_")-1, 2, 0 }, | |
389 | #else | |
390 | { "GLOBAL_.I.", sizeof ("GLOBAL_.I.")-1, 1, 0 }, | |
391 | { "GLOBAL_.D.", sizeof ("GLOBAL_.D.")-1, 2, 0 }, | |
392 | #endif | |
393 | #else | |
394 | { "GLOBAL_$I$", sizeof ("GLOBAL_$I$")-1, 1, 0 }, | |
395 | { "GLOBAL_$D$", sizeof ("GLOBAL_$I$")-1, 2, 0 }, | |
396 | #endif | |
397 | #ifdef CFRONT_LOSSAGE /* Don't collect cfront initialization functions. | |
398 | cfront has its own linker procedure to collect them; | |
399 | if collect2 gets them too, they get collected twice | |
400 | when the cfront procedure is run and the compiler used | |
401 | for linking happens to be GCC. */ | |
402 | { "sti__", sizeof ("sti__")-1, 1, 1 }, | |
403 | { "std__", sizeof ("std__")-1, 2, 1 }, | |
404 | #endif /* CFRONT_LOSSAGE */ | |
405 | { NULL, 0, 0, 0 } | |
406 | }; | |
407 | ||
408 | while ((ch = *s) == '_') | |
409 | ++s; | |
410 | ||
411 | if (s == orig_s) | |
412 | return 0; | |
413 | ||
414 | for (p = &special[0]; p->len > 0; p++) | |
415 | { | |
416 | if (ch == p->name[0] | |
417 | && (!p->two_underscores || ((s - orig_s) >= 2)) | |
418 | && strncmp(s, p->name, p->len) == 0) | |
419 | { | |
420 | return p->ret; | |
421 | } | |
422 | } | |
423 | return 0; | |
424 | } | |
425 | ||
426 | \f | |
427 | /* Compute a string to use as the base of all temporary file names. | |
428 | It is substituted for %g. */ | |
429 | ||
430 | static void | |
431 | choose_temp_base () | |
432 | { | |
433 | char *base = getenv ("TMPDIR"); | |
434 | int len; | |
435 | ||
436 | if (base == (char *)0) | |
437 | { | |
438 | #ifdef P_tmpdir | |
439 | if (access (P_tmpdir, R_OK | W_OK) == 0) | |
440 | base = P_tmpdir; | |
441 | #endif | |
442 | if (base == (char *)0) | |
443 | { | |
444 | if (access ("/usr/tmp", R_OK | W_OK) == 0) | |
445 | base = "/usr/tmp/"; | |
446 | else | |
447 | base = "/tmp/"; | |
448 | } | |
449 | } | |
450 | ||
451 | len = strlen (base); | |
452 | temp_filename = xmalloc (len + sizeof("/ccXXXXXX") + 1); | |
453 | strcpy (temp_filename, base); | |
454 | if (len > 0 && temp_filename[len-1] != '/') | |
455 | temp_filename[len++] = '/'; | |
456 | strcpy (temp_filename + len, "ccXXXXXX"); | |
457 | ||
458 | mktemp (temp_filename); | |
459 | temp_filename_length = strlen (temp_filename); | |
460 | } | |
461 | \f | |
462 | /* Routine to add variables to the environment. */ | |
463 | ||
464 | #ifndef HAVE_PUTENV | |
465 | ||
466 | putenv (str) | |
467 | char *str; | |
468 | { | |
469 | #ifndef VMS /* nor about VMS */ | |
470 | ||
471 | extern char **environ; | |
472 | char **old_environ = environ; | |
473 | char **envp; | |
474 | int num_envs = 0; | |
475 | int name_len = 1; | |
476 | int str_len = strlen (str); | |
477 | char *p = str; | |
478 | int ch; | |
479 | ||
480 | while ((ch = *p++) != '\0' && ch != '=') | |
481 | name_len++; | |
482 | ||
483 | if (!ch) | |
484 | abort (); | |
485 | ||
486 | /* Search for replacing an existing environment variable, and | |
487 | count the number of total environment variables. */ | |
488 | for (envp = old_environ; *envp; envp++) | |
489 | { | |
490 | num_envs++; | |
491 | if (!strncmp (str, *envp, name_len)) | |
492 | { | |
493 | *envp = str; | |
494 | return; | |
495 | } | |
496 | } | |
497 | ||
498 | /* Add a new environment variable */ | |
499 | environ = (char **) xmalloc (sizeof (char *) * (num_envs+2)); | |
500 | *environ = str; | |
501 | bcopy (old_environ, environ+1, sizeof (char *) * (num_envs+1)); | |
502 | ||
503 | #endif /* VMS */ | |
504 | } | |
505 | ||
506 | #endif /* HAVE_PUTENV */ | |
507 | \f | |
508 | /* By default, colon separates directories in a path. */ | |
509 | #ifndef PATH_SEPARATOR | |
510 | #define PATH_SEPARATOR ':' | |
511 | #endif | |
512 | ||
513 | /* Structure to hold all the directories in which to search for files to | |
514 | execute. */ | |
515 | ||
516 | struct prefix_list | |
517 | { | |
518 | char *prefix; /* String to prepend to the path. */ | |
519 | struct prefix_list *next; /* Next in linked list. */ | |
520 | }; | |
521 | ||
522 | struct path_prefix | |
523 | { | |
524 | struct prefix_list *plist; /* List of prefixes to try */ | |
525 | int max_len; /* Max length of a prefix in PLIST */ | |
526 | char *name; /* Name of this list (used in config stuff) */ | |
527 | }; | |
528 | ||
529 | /* We maintain two prefix lists: one from COMPILER_PATH environment variable | |
530 | and one from the PATH variable. */ | |
531 | ||
532 | static struct path_prefix cpath, path; | |
533 | ||
534 | #ifdef CROSS_COMPILE | |
535 | /* This is the name of the target machine. We use it to form the name | |
536 | of the files to execute. */ | |
537 | ||
538 | static char *target_machine = TARGET_MACHINE; | |
539 | #endif | |
540 | ||
541 | /* Names under which we were executed. Never return one of those files in our | |
542 | searches. */ | |
543 | ||
544 | static char *our_file_name, *last_file_name; | |
545 | \f | |
546 | /* Search for NAME using prefix list PPREFIX. We only look for executable | |
547 | files. | |
548 | ||
549 | Return 0 if not found, otherwise return its name, allocated with malloc. */ | |
550 | ||
551 | static char * | |
552 | find_a_file (pprefix, name) | |
553 | struct path_prefix *pprefix; | |
554 | char *name; | |
555 | { | |
556 | char *temp; | |
557 | struct prefix_list *pl; | |
558 | int len = pprefix->max_len + strlen (name) + 1; | |
559 | ||
560 | #ifdef EXECUTABLE_SUFFIX | |
561 | len += strlen (EXECUTABLE_SUFFIX); | |
562 | #endif | |
563 | ||
564 | temp = xmalloc (len); | |
565 | ||
566 | /* Determine the filename to execute (special case for absolute paths). */ | |
567 | ||
568 | if (*name == '/') | |
569 | { | |
570 | if (access (name, X_OK) == 0) | |
571 | { | |
572 | strcpy (temp, name); | |
573 | return temp; | |
574 | } | |
575 | } | |
576 | else | |
577 | for (pl = pprefix->plist; pl; pl = pl->next) | |
578 | { | |
579 | strcpy (temp, pl->prefix); | |
580 | strcat (temp, name); | |
581 | if (strcmp (temp, our_file_name) != 0 | |
582 | && ! (last_file_name != 0 && strcmp (temp, last_file_name) == 0) | |
583 | /* This is a kludge, but there seems no way around it. */ | |
584 | && strcmp (temp, "./ld") != 0 | |
585 | && access (temp, X_OK) == 0) | |
586 | return temp; | |
587 | ||
588 | #ifdef EXECUTABLE_SUFFIX | |
589 | /* Some systems have a suffix for executable files. | |
590 | So try appending that. */ | |
591 | strcat (temp, EXECUTABLE_SUFFIX); | |
592 | if (strcmp (temp, our_file_name) != 0 | |
593 | && ! (last_file_name != 0 && strcmp (temp, last_file_name) == 0) | |
594 | && access (temp, X_OK) == 0) | |
595 | return temp; | |
596 | #endif | |
597 | } | |
598 | ||
599 | free (temp); | |
600 | return 0; | |
601 | } | |
602 | ||
603 | /* Add an entry for PREFIX to prefix list PPREFIX. */ | |
604 | ||
605 | static void | |
606 | add_prefix (pprefix, prefix) | |
607 | struct path_prefix *pprefix; | |
608 | char *prefix; | |
609 | { | |
610 | struct prefix_list *pl, **prev; | |
611 | int len; | |
612 | ||
613 | if (pprefix->plist) | |
614 | { | |
615 | for (pl = pprefix->plist; pl->next; pl = pl->next) | |
616 | ; | |
617 | prev = &pl->next; | |
618 | } | |
619 | else | |
620 | prev = &pprefix->plist; | |
621 | ||
622 | /* Keep track of the longest prefix */ | |
623 | ||
624 | len = strlen (prefix); | |
625 | if (len > pprefix->max_len) | |
626 | pprefix->max_len = len; | |
627 | ||
628 | pl = (struct prefix_list *) xmalloc (sizeof (struct prefix_list)); | |
629 | pl->prefix = savestring (prefix, len); | |
630 | ||
631 | if (*prev) | |
632 | pl->next = *prev; | |
633 | else | |
634 | pl->next = (struct prefix_list *) 0; | |
635 | *prev = pl; | |
636 | } | |
637 | \f | |
638 | /* Take the value of the environment variable ENV, break it into a path, and | |
639 | add of the entries to PPREFIX. */ | |
640 | ||
641 | static void | |
642 | prefix_from_env (env, pprefix) | |
643 | char *env; | |
644 | struct path_prefix *pprefix; | |
645 | { | |
646 | char *p = getenv (env); | |
647 | ||
648 | if (p) | |
649 | { | |
650 | char *startp, *endp; | |
651 | char *nstore = (char *) xmalloc (strlen (p) + 3); | |
652 | ||
653 | startp = endp = p; | |
654 | while (1) | |
655 | { | |
656 | if (*endp == PATH_SEPARATOR || *endp == 0) | |
657 | { | |
658 | strncpy (nstore, startp, endp-startp); | |
659 | if (endp == startp) | |
660 | { | |
661 | strcpy (nstore, "./"); | |
662 | } | |
663 | else if (endp[-1] != '/') | |
664 | { | |
665 | nstore[endp-startp] = '/'; | |
666 | nstore[endp-startp+1] = 0; | |
667 | } | |
668 | else | |
669 | nstore[endp-startp] = 0; | |
670 | ||
671 | add_prefix (pprefix, nstore); | |
672 | if (*endp == 0) | |
673 | break; | |
674 | endp = startp = endp + 1; | |
675 | } | |
676 | else | |
677 | endp++; | |
678 | } | |
679 | } | |
680 | } | |
681 | \f | |
682 | /* Main program. */ | |
683 | ||
684 | int | |
685 | main (argc, argv) | |
686 | int argc; | |
687 | char *argv[]; | |
688 | { | |
689 | char *ld_suffix = "ld"; | |
690 | char *full_ld_suffix = ld_suffix; | |
691 | char *real_ld_suffix = "real-ld"; | |
692 | char *full_real_ld_suffix = real_ld_suffix; | |
693 | char *gld_suffix = "gld"; | |
694 | char *full_gld_suffix = gld_suffix; | |
695 | char *nm_suffix = "nm"; | |
696 | char *full_nm_suffix = nm_suffix; | |
697 | char *gnm_suffix = "gnm"; | |
698 | char *full_gnm_suffix = gnm_suffix; | |
699 | char *strip_suffix = "strip"; | |
700 | char *full_strip_suffix = strip_suffix; | |
701 | char *gstrip_suffix = "gstrip"; | |
702 | char *full_gstrip_suffix = gstrip_suffix; | |
703 | char *arg; | |
704 | FILE *outf; | |
705 | char *ld_file_name; | |
706 | char *c_file_name; | |
707 | char *p; | |
708 | char **c_argv; | |
709 | char **c_ptr; | |
710 | char **ld1_argv = (char **) xcalloc (sizeof (char *), argc+2); | |
711 | char **ld1 = ld1_argv; | |
712 | char **ld2_argv = (char **) xcalloc (sizeof (char *), argc+5); | |
713 | char **ld2 = ld2_argv; | |
714 | int first_file; | |
715 | int num_c_args = argc+7; | |
716 | int len; | |
717 | int clen; | |
718 | ||
719 | #ifdef DEBUG | |
720 | debug = 1; | |
721 | vflag = 1; | |
722 | #endif | |
723 | ||
724 | our_file_name = argv[0]; | |
725 | ||
726 | output_file = "a.out"; | |
727 | ||
728 | /* We must check that we do not call ourselves in an infinite | |
729 | recursion loop. We save the name used for us in the COLLECT_NAME | |
730 | environment variable, first getting the previous value. | |
731 | ||
732 | To be fully safe, we need to maintain a list of names that name | |
733 | been used, but, in practice, two names are enough. */ | |
734 | ||
735 | last_file_name = getenv ("COLLECT_NAME"); | |
736 | ||
737 | p = (char *) xcalloc (sizeof (char *), | |
738 | strlen (our_file_name) + strlen ("COLLECT_NAME=") + 1); | |
739 | sprintf (p, "COLLECT_NAME=%s", our_file_name); | |
740 | putenv (p); | |
741 | ||
742 | p = (char *) getenv ("COLLECT_GCC_OPTIONS"); | |
743 | if (p) | |
744 | while (*p) | |
745 | { | |
746 | char *q = p; | |
747 | while (*q && *q != ' ') q++; | |
748 | if (*p == '-' && p[1] == 'm') | |
749 | num_c_args++; | |
750 | ||
751 | if (*q) q++; | |
752 | p = q; | |
753 | } | |
754 | ||
755 | c_ptr = c_argv = (char **) xcalloc (sizeof (char *), num_c_args); | |
756 | ||
757 | if (argc < 2) | |
758 | fatal ("no arguments"); | |
759 | ||
760 | #ifdef SIGQUIT | |
761 | if (signal (SIGQUIT, SIG_IGN) != SIG_IGN) | |
762 | signal (SIGQUIT, handler); | |
763 | #endif | |
764 | if (signal (SIGINT, SIG_IGN) != SIG_IGN) | |
765 | signal (SIGINT, handler); | |
766 | #ifdef SIGALRM | |
767 | if (signal (SIGALRM, SIG_IGN) != SIG_IGN) | |
768 | signal (SIGALRM, handler); | |
769 | #endif | |
770 | #ifdef SIGHUP | |
771 | if (signal (SIGHUP, SIG_IGN) != SIG_IGN) | |
772 | signal (SIGHUP, handler); | |
773 | #endif | |
774 | if (signal (SIGSEGV, SIG_IGN) != SIG_IGN) | |
775 | signal (SIGSEGV, handler); | |
776 | #ifdef SIGBUS | |
777 | if (signal (SIGBUS, SIG_IGN) != SIG_IGN) | |
778 | signal (SIGBUS, handler); | |
779 | #endif | |
780 | ||
781 | /* Extract COMPILER_PATH and PATH into our prefix list. */ | |
782 | prefix_from_env ("COMPILER_PATH", &cpath); | |
783 | prefix_from_env ("PATH", &path); | |
784 | ||
785 | #ifdef CROSS_COMPILE | |
786 | /* If we look for a program in the compiler directories, we just use | |
787 | the short name, since these directories are already system-specific. | |
788 | But it we look for a took in the system directories, we need to | |
789 | qualify the program name with the target machine. */ | |
790 | ||
791 | full_ld_suffix | |
792 | = xcalloc (strlen (ld_suffix) + strlen (target_machine) + 2, 1); | |
793 | strcpy (full_ld_suffix, target_machine); | |
794 | strcat (full_ld_suffix, "-"); | |
795 | strcat (full_ld_suffix, ld_suffix); | |
796 | ||
797 | full_real_ld_suffix | |
798 | = xcalloc (strlen (real_ld_suffix) + strlen (target_machine) + 2, 1); | |
799 | strcpy (full_real_ld_suffix, target_machine); | |
800 | strcat (full_real_ld_suffix, "-"); | |
801 | strcat (full_real_ld_suffix, real_ld_suffix); | |
802 | ||
803 | full_gld_suffix | |
804 | = xcalloc (strlen (gld_suffix) + strlen (target_machine) + 2, 1); | |
805 | strcpy (full_gld_suffix, target_machine); | |
806 | strcat (full_gld_suffix, "-"); | |
807 | strcat (full_gld_suffix, gld_suffix); | |
808 | ||
809 | full_nm_suffix | |
810 | = xcalloc (strlen (nm_suffix) + strlen (target_machine) + 2, 1); | |
811 | strcpy (full_nm_suffix, target_machine); | |
812 | strcat (full_nm_suffix, "-"); | |
813 | strcat (full_nm_suffix, nm_suffix); | |
814 | ||
815 | full_gnm_suffix | |
816 | = xcalloc (strlen (gnm_suffix) + strlen (target_machine) + 2, 1); | |
817 | strcpy (full_gnm_suffix, target_machine); | |
818 | strcat (full_gnm_suffix, "-"); | |
819 | strcat (full_gnm_suffix, gnm_suffix); | |
820 | ||
821 | full_strip_suffix | |
822 | = xcalloc (strlen (strip_suffix) + strlen (target_machine) + 2, 1); | |
823 | strcpy (full_strip_suffix, target_machine); | |
824 | strcat (full_strip_suffix, "-"); | |
825 | strcat (full_strip_suffix, strip_suffix); | |
826 | ||
827 | full_gstrip_suffix | |
828 | = xcalloc (strlen (gstrip_suffix) + strlen (target_machine) + 2, 1); | |
829 | strcpy (full_gstrip_suffix, target_machine); | |
830 | strcat (full_gstrip_suffix, "-"); | |
831 | strcat (full_gstrip_suffix, gstrip_suffix); | |
832 | #endif /* CROSS_COMPILE */ | |
833 | ||
834 | /* Try to discover a valid linker/nm/strip to use. */ | |
835 | ||
836 | /* Search the (target-specific) compiler dirs for `gld'. */ | |
837 | ld_file_name = find_a_file (&cpath, gld_suffix); | |
838 | /* Search the ordinary system bin directories | |
839 | for `gld' (if native linking) or `TARGET-gld' (if cross). */ | |
840 | if (ld_file_name == 0) | |
841 | ld_file_name = find_a_file (&path, full_gld_suffix); | |
842 | /* Likewise for `real-ld'. */ | |
843 | if (ld_file_name == 0) | |
844 | ld_file_name = find_a_file (&cpath, real_ld_suffix); | |
845 | if (ld_file_name == 0) | |
846 | ld_file_name = find_a_file (&path, full_real_ld_suffix); | |
847 | /* Maybe we know the right file to use (if not cross). */ | |
848 | #ifdef REAL_LD_FILE_NAME | |
849 | if (ld_file_name == 0) | |
850 | ld_file_name = find_a_file (&path, REAL_LD_FILE_NAME); | |
851 | #endif | |
852 | /* This would be the right place to search the compiler dirs | |
853 | for `ld', but we don't do that, since this program is installed | |
854 | there as `ld'. */ | |
855 | /* Search the ordinary system bin directories | |
856 | for `ld' (if native linking) or `TARGET-ld' (if cross). */ | |
857 | if (ld_file_name == 0) | |
858 | ld_file_name = find_a_file (&path, full_ld_suffix); | |
859 | ||
860 | nm_file_name = find_a_file (&cpath, gnm_suffix); | |
861 | if (nm_file_name == 0) | |
862 | nm_file_name = find_a_file (&path, full_gnm_suffix); | |
863 | if (nm_file_name == 0) | |
864 | nm_file_name = find_a_file (&cpath, nm_suffix); | |
865 | #ifdef REAL_NM_FILE_NAME | |
866 | if (nm_file_name == 0) | |
867 | nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME); | |
868 | #endif | |
869 | if (nm_file_name == 0) | |
870 | nm_file_name = find_a_file (&path, full_nm_suffix); | |
871 | ||
872 | strip_file_name = find_a_file (&cpath, gstrip_suffix); | |
873 | if (strip_file_name == 0) | |
874 | strip_file_name = find_a_file (&path, full_gstrip_suffix); | |
875 | if (strip_file_name == 0) | |
876 | strip_file_name = find_a_file (&cpath, strip_suffix); | |
877 | #ifdef REAL_STRIP_FILE_NAME | |
878 | if (strip_file_name == 0) | |
879 | strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME); | |
880 | #endif | |
881 | if (strip_file_name == 0) | |
882 | strip_file_name = find_a_file (&path, full_strip_suffix); | |
883 | ||
884 | /* Determine the full path name of the C compiler to use. */ | |
885 | c_file_name = getenv ("COLLECT_GCC"); | |
886 | if (c_file_name == 0) | |
887 | { | |
888 | #ifdef CROSS_COMPILE | |
889 | c_file_name = xcalloc (sizeof ("gcc-") + strlen (target_machine) + 1, 1); | |
890 | strcpy (c_file_name, target_machine); | |
891 | strcat (c_file_name, "-gcc"); | |
892 | #else | |
893 | c_file_name = "gcc"; | |
894 | #endif | |
895 | } | |
896 | ||
897 | p = find_a_file (&cpath, c_file_name); | |
898 | ||
899 | /* Here it should be safe to use the system search path since we should have | |
900 | already qualified the name of the compiler when it is needed. */ | |
901 | if (p == 0) | |
902 | p = find_a_file (&path, c_file_name); | |
903 | ||
904 | if (p) | |
905 | c_file_name = p; | |
906 | ||
907 | *ld1++ = *ld2++ = ld_file_name; | |
908 | ||
909 | /* Make temp file names. */ | |
910 | choose_temp_base (); | |
911 | c_file = xcalloc (temp_filename_length + sizeof (".c"), 1); | |
912 | o_file = xcalloc (temp_filename_length + sizeof (".o"), 1); | |
913 | sprintf (c_file, "%s.c", temp_filename); | |
914 | sprintf (o_file, "%s.o", temp_filename); | |
915 | *c_ptr++ = c_file_name; | |
916 | *c_ptr++ = "-c"; | |
917 | *c_ptr++ = "-o"; | |
918 | *c_ptr++ = o_file; | |
919 | ||
920 | /* !!! When GCC calls collect2, | |
921 | it does not know whether it is calling collect2 or ld. | |
922 | So collect2 cannot meaningfully understand any options | |
923 | except those ld understands. | |
924 | If you propose to make GCC pass some other option, | |
925 | just imagine what will happen if ld is really ld!!! */ | |
926 | ||
927 | /* Parse arguments. Remember output file spec, pass the rest to ld. */ | |
928 | /* After the first file, put in the c++ rt0. */ | |
929 | ||
930 | first_file = 1; | |
931 | while ((arg = *++argv) != (char *)0) | |
932 | { | |
933 | *ld1++ = *ld2++ = arg; | |
934 | ||
935 | if (arg[0] == '-') | |
936 | switch (arg[1]) | |
937 | { | |
938 | case 'd': | |
939 | if (!strcmp (arg, "-debug")) | |
940 | { | |
941 | debug = 1; | |
942 | vflag = 1; | |
943 | ld1--; | |
944 | ld2--; | |
945 | } | |
946 | break; | |
947 | ||
948 | case 'o': | |
949 | output_file = (arg[2] == '\0') ? argv[1] : &arg[2]; | |
950 | break; | |
951 | ||
952 | case 'r': | |
953 | if (arg[2] == '\0') | |
954 | rflag = 1; | |
955 | break; | |
956 | ||
957 | case 's': | |
958 | if (arg[2] == '\0') | |
959 | { | |
960 | /* We must strip after the nm run, otherwise C++ linking | |
961 | won't work. Thus we strip in the second ld run, or | |
962 | else with strip if there is no second ld run. */ | |
963 | strip_flag = 1; | |
964 | ld1--; | |
965 | } | |
966 | break; | |
967 | ||
968 | case 'v': | |
969 | if (arg[2] == '\0') | |
970 | vflag = 1; | |
971 | break; | |
972 | } | |
973 | ||
974 | else if (first_file | |
975 | && (p = rindex (arg, '.')) != (char *)0 | |
976 | && strcmp (p, ".o") == 0) | |
977 | { | |
978 | first_file = 0; | |
979 | *ld2++ = o_file; | |
980 | } | |
981 | } | |
982 | ||
983 | /* Get any options that the upper GCC wants to pass to the sub-GCC. */ | |
984 | p = (char *) getenv ("COLLECT_GCC_OPTIONS"); | |
985 | if (p) | |
986 | while (*p) | |
987 | { | |
988 | char *q = p; | |
989 | while (*q && *q != ' ') q++; | |
990 | if (*p == '-' && (p[1] == 'm' || p[1] == 'f')) | |
991 | *c_ptr++ = savestring (p, q - p); | |
992 | ||
993 | if (*q) q++; | |
994 | p = q; | |
995 | } | |
996 | ||
997 | *c_ptr++ = c_file; | |
998 | *c_ptr = *ld1 = *ld2 = (char *)0; | |
999 | ||
1000 | if (vflag) | |
1001 | { | |
1002 | fprintf (stderr, "collect2 version %s", version_string); | |
1003 | #ifdef TARGET_VERSION | |
1004 | TARGET_VERSION; | |
1005 | #endif | |
1006 | fprintf (stderr, "\n"); | |
1007 | } | |
1008 | ||
1009 | if (debug) | |
1010 | { | |
1011 | char *ptr; | |
1012 | fprintf (stderr, "ld_file_name = %s\n", | |
1013 | (ld_file_name ? ld_file_name : "not found")); | |
1014 | fprintf (stderr, "c_file_name = %s\n", | |
1015 | (c_file_name ? c_file_name : "not found")); | |
1016 | fprintf (stderr, "nm_file_name = %s\n", | |
1017 | (nm_file_name ? nm_file_name : "not found")); | |
1018 | fprintf (stderr, "strip_file_name = %s\n", | |
1019 | (strip_file_name ? strip_file_name : "not found")); | |
1020 | fprintf (stderr, "c_file = %s\n", | |
1021 | (c_file ? c_file : "not found")); | |
1022 | fprintf (stderr, "o_file = %s\n", | |
1023 | (o_file ? o_file : "not found")); | |
1024 | ||
1025 | ptr = getenv ("COLLECT_GCC_OPTIONS"); | |
1026 | if (ptr) | |
1027 | fprintf (stderr, "COLLECT_GCC_OPTIONS = %s\n", ptr); | |
1028 | ||
1029 | ptr = getenv ("COLLECT_GCC"); | |
1030 | if (ptr) | |
1031 | fprintf (stderr, "COLLECT_GCC = %s\n", ptr); | |
1032 | ||
1033 | ptr = getenv ("COMPILER_PATH"); | |
1034 | if (ptr) | |
1035 | fprintf (stderr, "COMPILER_PATH = %s\n", ptr); | |
1036 | ||
1037 | ptr = getenv ("LIBRARY_PATH"); | |
1038 | if (ptr) | |
1039 | fprintf (stderr, "LIBRARY_PATH = %s\n", ptr); | |
1040 | ||
1041 | fprintf (stderr, "\n"); | |
1042 | } | |
1043 | ||
1044 | /* Load the program, searching all libraries. | |
1045 | Examine the namelist with nm and search it for static constructors | |
1046 | and destructors to call. | |
1047 | Write the constructor and destructor tables to a .s file and reload. */ | |
1048 | ||
1049 | fork_execute ("ld", ld1_argv); | |
1050 | ||
1051 | /* If -r, don't build the constructor or destructor list, just return now. */ | |
1052 | if (rflag) | |
1053 | return 0; | |
1054 | ||
1055 | scan_prog_file (output_file, PASS_FIRST); | |
1056 | ||
1057 | if (debug) | |
1058 | { | |
1059 | fprintf (stderr, "%d constructor(s) found\n", constructors.number); | |
1060 | fprintf (stderr, "%d destructor(s) found\n", destructors.number); | |
1061 | } | |
1062 | ||
1063 | if (constructors.number == 0 && destructors.number == 0) | |
1064 | { | |
1065 | /* Strip now if it was requested on the command line. */ | |
1066 | if (strip_flag) | |
1067 | { | |
1068 | char **strip_argv = (char **) xcalloc (sizeof (char *), 3); | |
1069 | strip_argv[0] = strip_file_name; | |
1070 | strip_argv[1] = output_file; | |
1071 | strip_argv[2] = (char *) 0; | |
1072 | fork_execute ("strip", strip_argv); | |
1073 | } | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | outf = fopen (c_file, "w"); | |
1078 | if (outf == (FILE *)0) | |
1079 | fatal_perror ("%s", c_file); | |
1080 | ||
1081 | write_c_file (outf, c_file); | |
1082 | ||
1083 | if (fclose (outf)) | |
1084 | fatal_perror ("closing %s", c_file); | |
1085 | ||
1086 | if (debug) | |
1087 | { | |
1088 | fprintf (stderr, "\n========== output_file = %s, c_file = %s\n", | |
1089 | output_file, c_file); | |
1090 | write_c_file (stderr, "stderr"); | |
1091 | fprintf (stderr, "========== end of c_file\n\n"); | |
1092 | } | |
1093 | ||
1094 | /* Assemble the constructor and destructor tables. | |
1095 | Link the tables in with the rest of the program. */ | |
1096 | ||
1097 | fork_execute ("gcc", c_argv); | |
1098 | fork_execute ("ld", ld2_argv); | |
1099 | ||
1100 | /* Let scan_prog_file do any final mods (OSF/rose needs this for | |
1101 | constructors/destructors in shared libraries. */ | |
1102 | scan_prog_file (output_file, PASS_SECOND); | |
1103 | ||
1104 | maybe_unlink (c_file); | |
1105 | maybe_unlink (o_file); | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | \f | |
1110 | /* Wait for a process to finish, and exit if a non-zero status is found. */ | |
1111 | ||
1112 | static void | |
1113 | do_wait (prog) | |
1114 | char *prog; | |
1115 | { | |
1116 | int status; | |
1117 | ||
1118 | wait (&status); | |
1119 | if (status) | |
1120 | { | |
1121 | int sig = status & 0x7F; | |
1122 | int ret; | |
1123 | ||
1124 | if (sig != -1 && sig != 0) | |
1125 | { | |
1126 | #ifdef NO_SYS_SIGLIST | |
1127 | error ("%s terminated with signal %d %s", | |
1128 | prog, | |
1129 | sig, | |
1130 | (status & 0200) ? ", core dumped" : ""); | |
1131 | #else | |
1132 | error ("%s terminated with signal %d [%s]%s", | |
1133 | prog, | |
1134 | sig, | |
1135 | sys_siglist[sig], | |
1136 | (status & 0200) ? ", core dumped" : ""); | |
1137 | #endif | |
1138 | ||
1139 | my_exit (127); | |
1140 | } | |
1141 | ||
1142 | ret = ((status & 0xFF00) >> 8); | |
1143 | if (ret != -1 && ret != 0) | |
1144 | { | |
1145 | error ("%s returned %d exit status", prog, ret); | |
1146 | my_exit (ret); | |
1147 | } | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | \f | |
1152 | /* Fork and execute a program, and wait for the reply. */ | |
1153 | ||
1154 | static void | |
1155 | fork_execute (prog, argv) | |
1156 | char *prog; | |
1157 | char **argv; | |
1158 | { | |
1159 | int pid; | |
1160 | ||
1161 | if (vflag || debug) | |
1162 | { | |
1163 | char **p_argv; | |
1164 | char *str; | |
1165 | ||
1166 | if (argv[0]) | |
1167 | fprintf (stderr, "%s", argv[0]); | |
1168 | else | |
1169 | fprintf (stderr, "[cannot find %s]", prog); | |
1170 | ||
1171 | for (p_argv = &argv[1]; (str = *p_argv) != (char *)0; p_argv++) | |
1172 | fprintf (stderr, " %s", str); | |
1173 | ||
1174 | fprintf (stderr, "\n"); | |
1175 | } | |
1176 | ||
1177 | fflush (stdout); | |
1178 | fflush (stderr); | |
1179 | ||
1180 | /* If we can't find a program we need, complain error. Do this here | |
1181 | since we might not end up needing something that we couldn't find. */ | |
1182 | ||
1183 | if (argv[0] == 0) | |
1184 | fatal ("cannot find `%s'", prog); | |
1185 | ||
1186 | pid = vfork (); | |
1187 | if (pid == -1) | |
1188 | fatal_perror ("vfork"); | |
1189 | ||
1190 | if (pid == 0) /* child context */ | |
1191 | { | |
1192 | execvp (argv[0], argv); | |
1193 | fatal_perror ("executing %s", prog); | |
1194 | } | |
1195 | ||
1196 | do_wait (prog); | |
1197 | } | |
1198 | ||
1199 | \f | |
1200 | /* Unlink a file unless we are debugging. */ | |
1201 | ||
1202 | static void | |
1203 | maybe_unlink (file) | |
1204 | char *file; | |
1205 | { | |
1206 | if (!debug) | |
1207 | unlink (file); | |
1208 | else | |
1209 | fprintf (stderr, "[Leaving %s]\n", file); | |
1210 | } | |
1211 | ||
1212 | \f | |
1213 | /* Add a name to a linked list. */ | |
1214 | ||
1215 | static void | |
1216 | add_to_list (head_ptr, name) | |
1217 | struct head *head_ptr; | |
1218 | char *name; | |
1219 | { | |
1220 | struct id *newid = (struct id *) xcalloc (sizeof (*newid) + strlen (name), 1); | |
1221 | static long sequence_number = 0; | |
1222 | newid->sequence = ++sequence_number; | |
1223 | strcpy (newid->name, name); | |
1224 | ||
1225 | if (head_ptr->first) | |
1226 | head_ptr->last->next = newid; | |
1227 | else | |
1228 | head_ptr->first = newid; | |
1229 | ||
1230 | head_ptr->last = newid; | |
1231 | head_ptr->number++; | |
1232 | } | |
1233 | ||
1234 | /* Write: `prefix', the names on list LIST, `suffix'. */ | |
1235 | ||
1236 | static void | |
1237 | write_list (stream, prefix, list) | |
1238 | FILE *stream; | |
1239 | char *prefix; | |
1240 | struct id *list; | |
1241 | { | |
1242 | while (list) | |
1243 | { | |
1244 | fprintf (stream, "%sx%d,\n", prefix, list->sequence); | |
1245 | list = list->next; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | static void | |
1250 | write_list_with_asm (stream, prefix, list) | |
1251 | FILE *stream; | |
1252 | char *prefix; | |
1253 | struct id *list; | |
1254 | { | |
1255 | while (list) | |
1256 | { | |
1257 | fprintf (stream, "%sx%d __asm__ (\"%s\");\n", | |
1258 | prefix, list->sequence, list->name); | |
1259 | list = list->next; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | /* Write the constructor/destructor tables. */ | |
1264 | ||
1265 | static void | |
1266 | write_c_file (stream, name) | |
1267 | FILE *stream; | |
1268 | char *name; | |
1269 | { | |
1270 | /* Write the tables as C code */ | |
1271 | ||
1272 | fprintf (stream, "typedef void entry_pt();\n\n"); | |
1273 | ||
1274 | write_list_with_asm (stream, "extern entry_pt ", constructors.first); | |
1275 | ||
1276 | fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n"); | |
1277 | fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number); | |
1278 | write_list (stream, "\t", constructors.first); | |
1279 | fprintf (stream, "\t0\n};\n\n"); | |
1280 | ||
1281 | write_list_with_asm (stream, "extern entry_pt ", destructors.first); | |
1282 | ||
1283 | fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n"); | |
1284 | fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number); | |
1285 | write_list (stream, "\t", destructors.first); | |
1286 | fprintf (stream, "\t0\n};\n\n"); | |
1287 | ||
1288 | fprintf (stream, "extern entry_pt __main;\n"); | |
1289 | fprintf (stream, "entry_pt *__main_reference = __main;\n\n"); | |
1290 | } | |
1291 | ||
1292 | \f | |
1293 | #ifdef OBJECT_FORMAT_NONE | |
1294 | ||
1295 | /* Generic version to scan the name list of the loaded program for | |
1296 | the symbols g++ uses for static constructors and destructors. | |
1297 | ||
1298 | The constructor table begins at __CTOR_LIST__ and contains a count | |
1299 | of the number of pointers (or -1 if the constructors are built in a | |
1300 | separate section by the linker), followed by the pointers to the | |
1301 | constructor functions, terminated with a null pointer. The | |
1302 | destructor table has the same format, and begins at __DTOR_LIST__. */ | |
1303 | ||
1304 | static void | |
1305 | scan_prog_file (prog_name, which_pass) | |
1306 | char *prog_name; | |
1307 | enum pass which_pass; | |
1308 | { | |
1309 | void (*int_handler) (); | |
1310 | void (*quit_handler) (); | |
1311 | char *nm_argv[4]; | |
1312 | int pid; | |
1313 | int argc = 0; | |
1314 | int pipe_fd[2]; | |
1315 | char *p, buf[1024]; | |
1316 | FILE *inf; | |
1317 | ||
1318 | if (which_pass != PASS_FIRST) | |
1319 | return; | |
1320 | ||
1321 | /* If we don't have an `nm', complain. */ | |
1322 | if (nm_file_name == 0) | |
1323 | fatal ("cannot find `nm'"); | |
1324 | ||
1325 | nm_argv[argc++] = "nm"; | |
1326 | if (NM_FLAGS[0] != '\0') | |
1327 | nm_argv[argc++] = NM_FLAGS; | |
1328 | ||
1329 | nm_argv[argc++] = prog_name; | |
1330 | nm_argv[argc++] = (char *)0; | |
1331 | ||
1332 | if (pipe (pipe_fd) < 0) | |
1333 | fatal_perror ("pipe"); | |
1334 | ||
1335 | inf = fdopen (pipe_fd[0], "r"); | |
1336 | if (inf == (FILE *)0) | |
1337 | fatal_perror ("fdopen"); | |
1338 | ||
1339 | /* Trace if needed. */ | |
1340 | if (vflag) | |
1341 | { | |
1342 | char **p_argv; | |
1343 | char *str; | |
1344 | ||
1345 | fprintf (stderr, "%s", nm_file_name); | |
1346 | for (p_argv = &nm_argv[1]; (str = *p_argv) != (char *)0; p_argv++) | |
1347 | fprintf (stderr, " %s", str); | |
1348 | ||
1349 | fprintf (stderr, "\n"); | |
1350 | } | |
1351 | ||
1352 | fflush (stdout); | |
1353 | fflush (stderr); | |
1354 | ||
1355 | /* Spawn child nm on pipe */ | |
1356 | pid = vfork (); | |
1357 | if (pid == -1) | |
1358 | fatal_perror ("vfork"); | |
1359 | ||
1360 | if (pid == 0) /* child context */ | |
1361 | { | |
1362 | /* setup stdout */ | |
1363 | if (dup2 (pipe_fd[1], 1) < 0) | |
1364 | fatal_perror ("dup2 (%d, 1)", pipe_fd[1]); | |
1365 | ||
1366 | if (close (pipe_fd[0]) < 0) | |
1367 | fatal_perror ("close (%d)", pipe_fd[0]); | |
1368 | ||
1369 | if (close (pipe_fd[1]) < 0) | |
1370 | fatal_perror ("close (%d)", pipe_fd[1]); | |
1371 | ||
1372 | execv (nm_file_name, nm_argv); | |
1373 | fatal_perror ("executing %s", nm_file_name); | |
1374 | } | |
1375 | ||
1376 | /* Parent context from here on. */ | |
1377 | int_handler = (void (*) ())signal (SIGINT, SIG_IGN); | |
1378 | #ifdef SIGQUIT | |
1379 | quit_handler = (void (*) ())signal (SIGQUIT, SIG_IGN); | |
1380 | #endif | |
1381 | ||
1382 | if (close (pipe_fd[1]) < 0) | |
1383 | fatal_perror ("close (%d)", pipe_fd[1]); | |
1384 | ||
1385 | if (debug) | |
1386 | fprintf (stderr, "\nnm output with constructors/destructors.\n"); | |
1387 | ||
1388 | /* Read each line of nm output. */ | |
1389 | while (fgets (buf, sizeof buf, inf) != (char *)0) | |
1390 | { | |
1391 | int ch, ch2; | |
1392 | char *name, *end; | |
1393 | ||
1394 | /* If it contains a constructor or destructor name, add the name | |
1395 | to the appropriate list. */ | |
1396 | ||
1397 | for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++) | |
1398 | ; | |
1399 | ||
1400 | if (ch == '\0' || ch == '\n') | |
1401 | continue; | |
1402 | ||
1403 | name = p; | |
1404 | /* Find the end of the symbol name. | |
1405 | Don't include `|', because Encore nm can tack that on the end. */ | |
1406 | for (end = p; (ch2 = *end) != '\0' && !isspace (ch2) && ch2 != '|'; | |
1407 | end++) | |
1408 | continue; | |
1409 | ||
1410 | *end = '\0'; | |
1411 | switch (is_ctor_dtor (name)) | |
1412 | { | |
1413 | case 1: | |
1414 | add_to_list (&constructors, name); | |
1415 | break; | |
1416 | ||
1417 | case 2: | |
1418 | add_to_list (&destructors, name); | |
1419 | break; | |
1420 | ||
1421 | default: /* not a constructor or destructor */ | |
1422 | continue; | |
1423 | } | |
1424 | ||
1425 | if (debug) | |
1426 | fprintf (stderr, "\t%s\n", buf); | |
1427 | } | |
1428 | ||
1429 | if (debug) | |
1430 | fprintf (stderr, "\n"); | |
1431 | ||
1432 | if (fclose (inf) != 0) | |
1433 | fatal_perror ("fclose of pipe"); | |
1434 | ||
1435 | do_wait (nm_file_name); | |
1436 | ||
1437 | signal (SIGINT, int_handler); | |
1438 | #ifdef SIGQUIT | |
1439 | signal (SIGQUIT, quit_handler); | |
1440 | #endif | |
1441 | } | |
1442 | ||
1443 | #endif /* OBJECT_FORMAT_NONE */ | |
1444 | ||
1445 | \f | |
1446 | /* | |
1447 | * COFF specific stuff. | |
1448 | */ | |
1449 | ||
1450 | #ifdef OBJECT_FORMAT_COFF | |
1451 | ||
1452 | #if defined(EXTENDED_COFF) | |
1453 | # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax) | |
1454 | # define GCC_SYMENT SYMR | |
1455 | # define GCC_OK_SYMBOL(X) ((X).st == stProc && (X).sc == scText) | |
1456 | # define GCC_SYMINC(X) (1) | |
1457 | # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax) | |
1458 | # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0) | |
1459 | #else | |
1460 | # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms) | |
1461 | # define GCC_SYMENT SYMENT | |
1462 | # define GCC_OK_SYMBOL(X) \ | |
1463 | (((X).n_sclass == C_EXT) && \ | |
1464 | (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) || \ | |
1465 | ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))) | |
1466 | # define GCC_SYMINC(X) ((X).n_numaux+1) | |
1467 | # define GCC_SYMZERO(X) 0 | |
1468 | # define GCC_CHECK_HDR(X) (1) | |
1469 | #endif | |
1470 | ||
1471 | extern char *ldgetname (); | |
1472 | ||
1473 | /* COFF version to scan the name list of the loaded program for | |
1474 | the symbols g++ uses for static constructors and destructors. | |
1475 | ||
1476 | The constructor table begins at __CTOR_LIST__ and contains a count | |
1477 | of the number of pointers (or -1 if the constructors are built in a | |
1478 | separate section by the linker), followed by the pointers to the | |
1479 | constructor functions, terminated with a null pointer. The | |
1480 | destructor table has the same format, and begins at __DTOR_LIST__. */ | |
1481 | ||
1482 | static void | |
1483 | scan_prog_file (prog_name, which_pass) | |
1484 | char *prog_name; | |
1485 | enum pass which_pass; | |
1486 | { | |
1487 | LDFILE *ldptr = NULL; | |
1488 | int sym_index, sym_count; | |
1489 | ||
1490 | if (which_pass != PASS_FIRST) | |
1491 | return; | |
1492 | ||
1493 | if ((ldptr = ldopen (prog_name, ldptr)) == NULL) | |
1494 | fatal ("%s: can't open as COFF file", prog_name); | |
1495 | ||
1496 | if (!MY_ISCOFF (HEADER (ldptr).f_magic)) | |
1497 | fatal ("%s: not a COFF file", prog_name); | |
1498 | ||
1499 | if (GCC_CHECK_HDR (ldptr)) | |
1500 | { | |
1501 | sym_count = GCC_SYMBOLS (ldptr); | |
1502 | sym_index = GCC_SYMZERO (ldptr); | |
1503 | while (sym_index < sym_count) | |
1504 | { | |
1505 | GCC_SYMENT symbol; | |
1506 | ||
1507 | if (ldtbread (ldptr, sym_index, &symbol) <= 0) | |
1508 | break; | |
1509 | sym_index += GCC_SYMINC (symbol); | |
1510 | ||
1511 | if (GCC_OK_SYMBOL (symbol)) | |
1512 | { | |
1513 | char *name; | |
1514 | ||
1515 | if ((name = ldgetname (ldptr, &symbol)) == NULL) | |
1516 | continue; /* should never happen */ | |
1517 | ||
1518 | #ifdef _AIX | |
1519 | /* All AIX function names begin with a dot. */ | |
1520 | if (*name++ != '.') | |
1521 | continue; | |
1522 | #endif | |
1523 | ||
1524 | switch (is_ctor_dtor (name)) | |
1525 | { | |
1526 | case 1: | |
1527 | add_to_list (&constructors, name); | |
1528 | break; | |
1529 | ||
1530 | case 2: | |
1531 | add_to_list (&destructors, name); | |
1532 | break; | |
1533 | ||
1534 | default: /* not a constructor or destructor */ | |
1535 | continue; | |
1536 | } | |
1537 | ||
1538 | #if !defined(EXTENDED_COFF) | |
1539 | if (debug) | |
1540 | fprintf (stderr, "\tsec=%d class=%d type=%s%o %s\n", | |
1541 | symbol.n_scnum, symbol.n_sclass, | |
1542 | (symbol.n_type ? "0" : ""), symbol.n_type, | |
1543 | name); | |
1544 | #else | |
1545 | if (debug) | |
1546 | fprintf (stderr, "\tiss = %5d, value = %5d, index = %5d, name = %s\n", | |
1547 | symbol.iss, symbol.value, symbol.index, name); | |
1548 | #endif | |
1549 | } | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | (void) ldclose(ldptr); | |
1554 | } | |
1555 | ||
1556 | #endif /* OBJECT_FORMAT_COFF */ | |
1557 | ||
1558 | \f | |
1559 | /* | |
1560 | * OSF/rose specific stuff. | |
1561 | */ | |
1562 | ||
1563 | #ifdef OBJECT_FORMAT_ROSE | |
1564 | ||
1565 | /* Union of the various load commands */ | |
1566 | ||
1567 | typedef union load_union | |
1568 | { | |
1569 | ldc_header_t hdr; /* common header */ | |
1570 | load_cmd_map_command_t map; /* map indexing other load cmds */ | |
1571 | interpreter_command_t iprtr; /* interpreter pathname */ | |
1572 | strings_command_t str; /* load commands strings section */ | |
1573 | region_command_t region; /* region load command */ | |
1574 | reloc_command_t reloc; /* relocation section */ | |
1575 | package_command_t pkg; /* package load command */ | |
1576 | symbols_command_t sym; /* symbol sections */ | |
1577 | entry_command_t ent; /* program start section */ | |
1578 | gen_info_command_t info; /* object information */ | |
1579 | func_table_command_t func; /* function constructors/destructors */ | |
1580 | } load_union_t; | |
1581 | ||
1582 | /* Structure to point to load command and data section in memory. */ | |
1583 | ||
1584 | typedef struct load_all | |
1585 | { | |
1586 | load_union_t *load; /* load command */ | |
1587 | char *section; /* pointer to section */ | |
1588 | } load_all_t; | |
1589 | ||
1590 | /* Structure to contain information about a file mapped into memory. */ | |
1591 | ||
1592 | struct file_info | |
1593 | { | |
1594 | char *start; /* start of map */ | |
1595 | char *name; /* filename */ | |
1596 | long size; /* size of the file */ | |
1597 | long rounded_size; /* size rounded to page boundary */ | |
1598 | int fd; /* file descriptor */ | |
1599 | int rw; /* != 0 if opened read/write */ | |
1600 | int use_mmap; /* != 0 if mmap'ed */ | |
1601 | }; | |
1602 | ||
1603 | extern int decode_mach_o_hdr (); | |
1604 | ||
1605 | extern int encode_mach_o_hdr (); | |
1606 | ||
1607 | static void bad_header (); | |
1608 | ||
1609 | static void print_header (); | |
1610 | ||
1611 | static void print_load_command (); | |
1612 | ||
1613 | static void add_func_table (); | |
1614 | ||
1615 | static struct file_info *read_file (); | |
1616 | ||
1617 | static void end_file (); | |
1618 | ||
1619 | \f | |
1620 | /* OSF/rose specific version to scan the name list of the loaded | |
1621 | program for the symbols g++ uses for static constructors and | |
1622 | destructors. | |
1623 | ||
1624 | The constructor table begins at __CTOR_LIST__ and contains a count | |
1625 | of the number of pointers (or -1 if the constructors are built in a | |
1626 | separate section by the linker), followed by the pointers to the | |
1627 | constructor functions, terminated with a null pointer. The | |
1628 | destructor table has the same format, and begins at __DTOR_LIST__. */ | |
1629 | ||
1630 | static void | |
1631 | scan_prog_file (prog_name, which_pass) | |
1632 | char *prog_name; | |
1633 | enum pass which_pass; | |
1634 | { | |
1635 | char *obj; | |
1636 | mo_header_t hdr; | |
1637 | load_all_t *load_array; | |
1638 | load_all_t *load_end; | |
1639 | load_all_t *load_cmd; | |
1640 | int symbol_load_cmds; | |
1641 | off_t offset; | |
1642 | int i; | |
1643 | int num_syms; | |
1644 | int status; | |
1645 | char *str_sect; | |
1646 | struct file_info *obj_file; | |
1647 | int prog_fd; | |
1648 | mo_lcid_t cmd_strings = -1; | |
1649 | symbol_info_t *main_sym = 0; | |
1650 | int rw = (which_pass != PASS_FIRST); | |
1651 | ||
1652 | prog_fd = open (prog_name, (rw) ? O_RDWR : O_RDONLY); | |
1653 | if (prog_fd < 0) | |
1654 | fatal_perror ("can't read %s", prog_name); | |
1655 | ||
1656 | obj_file = read_file (prog_name, prog_fd, rw); | |
1657 | obj = obj_file->start; | |
1658 | ||
1659 | status = decode_mach_o_hdr (obj, MO_SIZEOF_RAW_HDR, MOH_HEADER_VERSION, &hdr); | |
1660 | if (status != MO_HDR_CONV_SUCCESS) | |
1661 | bad_header (status); | |
1662 | ||
1663 | ||
1664 | /* Do some basic sanity checks. Note we explicitly use the big endian magic number, | |
1665 | since the hardware will automatically swap bytes for us on loading little endian | |
1666 | integers. */ | |
1667 | ||
1668 | #ifndef CROSS_COMPILE | |
1669 | if (hdr.moh_magic != MOH_MAGIC_MSB | |
1670 | || hdr.moh_header_version != MOH_HEADER_VERSION | |
1671 | || hdr.moh_byte_order != OUR_BYTE_ORDER | |
1672 | || hdr.moh_data_rep_id != OUR_DATA_REP_ID | |
1673 | || hdr.moh_cpu_type != OUR_CPU_TYPE | |
1674 | || hdr.moh_cpu_subtype != OUR_CPU_SUBTYPE | |
1675 | || hdr.moh_vendor_type != OUR_VENDOR_TYPE) | |
1676 | { | |
1677 | fatal ("incompatibilities between object file & expected values"); | |
1678 | } | |
1679 | #endif | |
1680 | ||
1681 | if (debug) | |
1682 | print_header (&hdr); | |
1683 | ||
1684 | offset = hdr.moh_first_cmd_off; | |
1685 | load_end = load_array | |
1686 | = (load_all_t *) xcalloc (sizeof (load_all_t), hdr.moh_n_load_cmds + 2); | |
1687 | ||
1688 | /* Build array of load commands, calculating the offsets */ | |
1689 | for (i = 0; i < hdr.moh_n_load_cmds; i++) | |
1690 | { | |
1691 | load_union_t *load_hdr; /* load command header */ | |
1692 | ||
1693 | load_cmd = load_end++; | |
1694 | load_hdr = (load_union_t *) (obj + offset); | |
1695 | ||
1696 | /* If modifying the program file, copy the header. */ | |
1697 | if (rw) | |
1698 | { | |
1699 | load_union_t *ptr = (load_union_t *) xmalloc (load_hdr->hdr.ldci_cmd_size); | |
1700 | bcopy ((generic *)load_hdr, (generic *)ptr, load_hdr->hdr.ldci_cmd_size); | |
1701 | load_hdr = ptr; | |
1702 | ||
1703 | /* null out old command map, because we will rewrite at the end. */ | |
1704 | if (ptr->hdr.ldci_cmd_type == LDC_CMD_MAP) | |
1705 | { | |
1706 | cmd_strings = ptr->map.lcm_ld_cmd_strings; | |
1707 | ptr->hdr.ldci_cmd_type = LDC_UNDEFINED; | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | load_cmd->load = load_hdr; | |
1712 | if (load_hdr->hdr.ldci_section_off > 0) | |
1713 | load_cmd->section = obj + load_hdr->hdr.ldci_section_off; | |
1714 | ||
1715 | if (debug) | |
1716 | print_load_command (load_hdr, offset, i); | |
1717 | ||
1718 | offset += load_hdr->hdr.ldci_cmd_size; | |
1719 | } | |
1720 | ||
1721 | /* If the last command is the load command map and is not undefined, | |
1722 | decrement the count of load commands. */ | |
1723 | if (rw && load_end[-1].load->hdr.ldci_cmd_type == LDC_UNDEFINED) | |
1724 | { | |
1725 | load_end--; | |
1726 | hdr.moh_n_load_cmds--; | |
1727 | } | |
1728 | ||
1729 | /* Go through and process each symbol table section. */ | |
1730 | symbol_load_cmds = 0; | |
1731 | for (load_cmd = load_array; load_cmd < load_end; load_cmd++) | |
1732 | { | |
1733 | load_union_t *load_hdr = load_cmd->load; | |
1734 | ||
1735 | if (load_hdr->hdr.ldci_cmd_type == LDC_SYMBOLS) | |
1736 | { | |
1737 | symbol_load_cmds++; | |
1738 | ||
1739 | if (debug) | |
1740 | { | |
1741 | char *kind = "unknown"; | |
1742 | ||
1743 | switch (load_hdr->sym.symc_kind) | |
1744 | { | |
1745 | case SYMC_IMPORTS: kind = "imports"; break; | |
1746 | case SYMC_DEFINED_SYMBOLS: kind = "defined"; break; | |
1747 | case SYMC_STABS: kind = "stabs"; break; | |
1748 | } | |
1749 | ||
1750 | fprintf (stderr, "\nProcessing symbol table #%d, offset = 0x%.8lx, kind = %s\n", | |
1751 | symbol_load_cmds, load_hdr->hdr.ldci_section_off, kind); | |
1752 | } | |
1753 | ||
1754 | if (load_hdr->sym.symc_kind != SYMC_DEFINED_SYMBOLS) | |
1755 | continue; | |
1756 | ||
1757 | str_sect = load_array[load_hdr->sym.symc_strings_section].section; | |
1758 | if (str_sect == (char *)0) | |
1759 | fatal ("string section missing"); | |
1760 | ||
1761 | if (load_cmd->section == (char *)0) | |
1762 | fatal ("section pointer missing"); | |
1763 | ||
1764 | num_syms = load_hdr->sym.symc_nentries; | |
1765 | for (i = 0; i < num_syms; i++) | |
1766 | { | |
1767 | symbol_info_t *sym = ((symbol_info_t *) load_cmd->section) + i; | |
1768 | char *name = sym->si_name.symbol_name + str_sect; | |
1769 | ||
1770 | if (name[0] != '_') | |
1771 | continue; | |
1772 | ||
1773 | if (rw) | |
1774 | { | |
1775 | char *n = name; | |
1776 | while (*n == '_') | |
1777 | ++n; | |
1778 | if (*n != 'm' || (n - name) < 2 || strcmp (n, "main")) | |
1779 | continue; | |
1780 | ||
1781 | main_sym = sym; | |
1782 | } | |
1783 | else | |
1784 | { | |
1785 | switch (is_ctor_dtor (name)) | |
1786 | { | |
1787 | case 1: | |
1788 | add_to_list (&constructors, name); | |
1789 | break; | |
1790 | ||
1791 | case 2: | |
1792 | add_to_list (&destructors, name); | |
1793 | break; | |
1794 | ||
1795 | default: /* not a constructor or destructor */ | |
1796 | continue; | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | if (debug) | |
1801 | fprintf (stderr, "\ttype = 0x%.4x, sc = 0x%.2x, flags = 0x%.8x, name = %.30s\n", | |
1802 | sym->si_type, sym->si_sc_type, sym->si_flags, name); | |
1803 | } | |
1804 | } | |
1805 | } | |
1806 | ||
1807 | if (symbol_load_cmds == 0) | |
1808 | fatal ("no symbol table found"); | |
1809 | ||
1810 | /* Update the program file now, rewrite header and load commands. At present, | |
1811 | we assume that there is enough space after the last load command to insert | |
1812 | one more. Since the first section written out is page aligned, and the | |
1813 | number of load commands is small, this is ok for the present. */ | |
1814 | ||
1815 | if (rw) | |
1816 | { | |
1817 | load_union_t *load_map; | |
1818 | size_t size; | |
1819 | ||
1820 | if (cmd_strings == -1) | |
1821 | fatal ("no cmd_strings found"); | |
1822 | ||
1823 | /* Add __main to initializer list. | |
1824 | If we are building a program instead of a shared library, don't | |
1825 | do anything, since in the current version, you cannot do mallocs | |
1826 | and such in the constructors. */ | |
1827 | ||
1828 | if (main_sym != (symbol_info_t *)0 | |
1829 | && ((hdr.moh_flags & MOH_EXECABLE_F) == 0)) | |
1830 | add_func_table (&hdr, load_array, main_sym, FNTC_INITIALIZATION); | |
1831 | ||
1832 | if (debug) | |
1833 | fprintf (stderr, "\nUpdating header and load commands.\n\n"); | |
1834 | ||
1835 | hdr.moh_n_load_cmds++; | |
1836 | size = sizeof (load_cmd_map_command_t) + (sizeof (mo_offset_t) * (hdr.moh_n_load_cmds - 1)); | |
1837 | ||
1838 | /* Create new load command map. */ | |
1839 | if (debug) | |
1840 | fprintf (stderr, "load command map, %d cmds, new size %ld.\n", | |
1841 | (int)hdr.moh_n_load_cmds, (long)size); | |
1842 | ||
1843 | load_map = (load_union_t *) xcalloc (1, size); | |
1844 | load_map->map.ldc_header.ldci_cmd_type = LDC_CMD_MAP; | |
1845 | load_map->map.ldc_header.ldci_cmd_size = size; | |
1846 | load_map->map.lcm_ld_cmd_strings = cmd_strings; | |
1847 | load_map->map.lcm_nentries = hdr.moh_n_load_cmds; | |
1848 | load_array[hdr.moh_n_load_cmds-1].load = load_map; | |
1849 | ||
1850 | offset = hdr.moh_first_cmd_off; | |
1851 | for (i = 0; i < hdr.moh_n_load_cmds; i++) | |
1852 | { | |
1853 | load_map->map.lcm_map[i] = offset; | |
1854 | if (load_array[i].load->hdr.ldci_cmd_type == LDC_CMD_MAP) | |
1855 | hdr.moh_load_map_cmd_off = offset; | |
1856 | ||
1857 | offset += load_array[i].load->hdr.ldci_cmd_size; | |
1858 | } | |
1859 | ||
1860 | hdr.moh_sizeofcmds = offset - MO_SIZEOF_RAW_HDR; | |
1861 | ||
1862 | if (debug) | |
1863 | print_header (&hdr); | |
1864 | ||
1865 | /* Write header */ | |
1866 | status = encode_mach_o_hdr (&hdr, obj, MO_SIZEOF_RAW_HDR); | |
1867 | if (status != MO_HDR_CONV_SUCCESS) | |
1868 | bad_header (status); | |
1869 | ||
1870 | if (debug) | |
1871 | fprintf (stderr, "writing load commands.\n\n"); | |
1872 | ||
1873 | /* Write load commands */ | |
1874 | offset = hdr.moh_first_cmd_off; | |
1875 | for (i = 0; i < hdr.moh_n_load_cmds; i++) | |
1876 | { | |
1877 | load_union_t *load_hdr = load_array[i].load; | |
1878 | size_t size = load_hdr->hdr.ldci_cmd_size; | |
1879 | ||
1880 | if (debug) | |
1881 | print_load_command (load_hdr, offset, i); | |
1882 | ||
1883 | bcopy ((generic *)load_hdr, (generic *)(obj + offset), size); | |
1884 | offset += size; | |
1885 | } | |
1886 | } | |
1887 | ||
1888 | end_file (obj_file); | |
1889 | ||
1890 | if (close (prog_fd)) | |
1891 | fatal_perror ("closing %s", prog_name); | |
1892 | ||
1893 | if (debug) | |
1894 | fprintf (stderr, "\n"); | |
1895 | } | |
1896 | ||
1897 | \f | |
1898 | /* Add a function table to the load commands to call a function | |
1899 | on initiation or termination of the process. */ | |
1900 | ||
1901 | static void | |
1902 | add_func_table (hdr_p, load_array, sym, type) | |
1903 | mo_header_t *hdr_p; /* pointer to global header */ | |
1904 | load_all_t *load_array; /* array of ptrs to load cmds */ | |
1905 | symbol_info_t *sym; /* pointer to symbol entry */ | |
1906 | int type; /* fntc_type value */ | |
1907 | { | |
1908 | /* Add a new load command. */ | |
1909 | int num_cmds = ++hdr_p->moh_n_load_cmds; | |
1910 | int load_index = num_cmds - 1; | |
1911 | size_t size = sizeof (func_table_command_t) + sizeof (mo_addr_t); | |
1912 | load_union_t *ptr = xcalloc (1, size); | |
1913 | load_all_t *load_cmd; | |
1914 | int i; | |
1915 | ||
1916 | /* Set the unresolved address bit in the header to force the loader to be | |
1917 | used, since kernel exec does not call the initialization functions. */ | |
1918 | hdr_p->moh_flags |= MOH_UNRESOLVED_F; | |
1919 | ||
1920 | load_cmd = &load_array[load_index]; | |
1921 | load_cmd->load = ptr; | |
1922 | load_cmd->section = (char *)0; | |
1923 | ||
1924 | /* Fill in func table load command. */ | |
1925 | ptr->func.ldc_header.ldci_cmd_type = LDC_FUNC_TABLE; | |
1926 | ptr->func.ldc_header.ldci_cmd_size = size; | |
1927 | ptr->func.ldc_header.ldci_section_off = 0; | |
1928 | ptr->func.ldc_header.ldci_section_len = 0; | |
1929 | ptr->func.fntc_type = type; | |
1930 | ptr->func.fntc_nentries = 1; | |
1931 | ||
1932 | /* copy address, turn it from abs. address to (region,offset) if necessary. */ | |
1933 | /* Is the symbol already expressed as (region, offset)? */ | |
1934 | if ((sym->si_flags & SI_ABSOLUTE_VALUE_F) == 0) | |
1935 | { | |
1936 | ptr->func.fntc_entry_loc[i].adr_lcid = sym->si_value.def_val.adr_lcid; | |
1937 | ptr->func.fntc_entry_loc[i].adr_sctoff = sym->si_value.def_val.adr_sctoff; | |
1938 | } | |
1939 | ||
1940 | /* If not, figure out which region it's in. */ | |
1941 | else | |
1942 | { | |
1943 | mo_vm_addr_t addr = sym->si_value.abs_val; | |
1944 | int found = 0; | |
1945 | ||
1946 | for (i = 0; i < load_index; i++) | |
1947 | { | |
1948 | if (load_array[i].load->hdr.ldci_cmd_type == LDC_REGION) | |
1949 | { | |
1950 | region_command_t *region_ptr = &load_array[i].load->region; | |
1951 | ||
1952 | if ((region_ptr->regc_flags & REG_ABS_ADDR_F) != 0 | |
1953 | && addr >= region_ptr->regc_addr.vm_addr | |
1954 | && addr <= region_ptr->regc_addr.vm_addr + region_ptr->regc_vm_size) | |
1955 | { | |
1956 | ptr->func.fntc_entry_loc[0].adr_lcid = i; | |
1957 | ptr->func.fntc_entry_loc[0].adr_sctoff = addr - region_ptr->regc_addr.vm_addr; | |
1958 | found++; | |
1959 | break; | |
1960 | } | |
1961 | } | |
1962 | } | |
1963 | ||
1964 | if (!found) | |
1965 | fatal ("could not convert 0x%l.8x into a region", addr); | |
1966 | } | |
1967 | ||
1968 | if (debug) | |
1969 | fprintf (stderr, | |
1970 | "%s function, region %d, offset = %ld (0x%.8lx)\n", | |
1971 | (type == FNTC_INITIALIZATION) ? "init" : "term", | |
1972 | (int)ptr->func.fntc_entry_loc[i].adr_lcid, | |
1973 | (long)ptr->func.fntc_entry_loc[i].adr_sctoff, | |
1974 | (long)ptr->func.fntc_entry_loc[i].adr_sctoff); | |
1975 | ||
1976 | } | |
1977 | ||
1978 | \f | |
1979 | /* Print the global header for an OSF/rose object. */ | |
1980 | ||
1981 | static void | |
1982 | print_header (hdr_ptr) | |
1983 | mo_header_t *hdr_ptr; | |
1984 | { | |
1985 | fprintf (stderr, "\nglobal header:\n"); | |
1986 | fprintf (stderr, "\tmoh_magic = 0x%.8lx\n", hdr_ptr->moh_magic); | |
1987 | fprintf (stderr, "\tmoh_major_version = %d\n", (int)hdr_ptr->moh_major_version); | |
1988 | fprintf (stderr, "\tmoh_minor_version = %d\n", (int)hdr_ptr->moh_minor_version); | |
1989 | fprintf (stderr, "\tmoh_header_version = %d\n", (int)hdr_ptr->moh_header_version); | |
1990 | fprintf (stderr, "\tmoh_max_page_size = %d\n", (int)hdr_ptr->moh_max_page_size); | |
1991 | fprintf (stderr, "\tmoh_byte_order = %d\n", (int)hdr_ptr->moh_byte_order); | |
1992 | fprintf (stderr, "\tmoh_data_rep_id = %d\n", (int)hdr_ptr->moh_data_rep_id); | |
1993 | fprintf (stderr, "\tmoh_cpu_type = %d\n", (int)hdr_ptr->moh_cpu_type); | |
1994 | fprintf (stderr, "\tmoh_cpu_subtype = %d\n", (int)hdr_ptr->moh_cpu_subtype); | |
1995 | fprintf (stderr, "\tmoh_vendor_type = %d\n", (int)hdr_ptr->moh_vendor_type); | |
1996 | fprintf (stderr, "\tmoh_load_map_cmd_off = %d\n", (int)hdr_ptr->moh_load_map_cmd_off); | |
1997 | fprintf (stderr, "\tmoh_first_cmd_off = %d\n", (int)hdr_ptr->moh_first_cmd_off); | |
1998 | fprintf (stderr, "\tmoh_sizeofcmds = %d\n", (int)hdr_ptr->moh_sizeofcmds); | |
1999 | fprintf (stderr, "\tmon_n_load_cmds = %d\n", (int)hdr_ptr->moh_n_load_cmds); | |
2000 | fprintf (stderr, "\tmoh_flags = 0x%.8lx", (long)hdr_ptr->moh_flags); | |
2001 | ||
2002 | if (hdr_ptr->moh_flags & MOH_RELOCATABLE_F) | |
2003 | fprintf (stderr, ", relocatable"); | |
2004 | ||
2005 | if (hdr_ptr->moh_flags & MOH_LINKABLE_F) | |
2006 | fprintf (stderr, ", linkable"); | |
2007 | ||
2008 | if (hdr_ptr->moh_flags & MOH_EXECABLE_F) | |
2009 | fprintf (stderr, ", execable"); | |
2010 | ||
2011 | if (hdr_ptr->moh_flags & MOH_EXECUTABLE_F) | |
2012 | fprintf (stderr, ", executable"); | |
2013 | ||
2014 | if (hdr_ptr->moh_flags & MOH_UNRESOLVED_F) | |
2015 | fprintf (stderr, ", unresolved"); | |
2016 | ||
2017 | fprintf (stderr, "\n\n"); | |
2018 | return; | |
2019 | } | |
2020 | ||
2021 | \f | |
2022 | /* Print a short summary of a load command. */ | |
2023 | ||
2024 | static void | |
2025 | print_load_command (load_hdr, offset, number) | |
2026 | load_union_t *load_hdr; | |
2027 | size_t offset; | |
2028 | int number; | |
2029 | { | |
2030 | mo_long_t type = load_hdr->hdr.ldci_cmd_type; | |
2031 | char *type_str = (char *)0; | |
2032 | ||
2033 | switch (type) | |
2034 | { | |
2035 | case LDC_UNDEFINED: type_str = "UNDEFINED"; break; | |
2036 | case LDC_CMD_MAP: type_str = "CMD_MAP"; break; | |
2037 | case LDC_INTERPRETER: type_str = "INTERPRETER"; break; | |
2038 | case LDC_STRINGS: type_str = "STRINGS"; break; | |
2039 | case LDC_REGION: type_str = "REGION"; break; | |
2040 | case LDC_RELOC: type_str = "RELOC"; break; | |
2041 | case LDC_PACKAGE: type_str = "PACKAGE"; break; | |
2042 | case LDC_SYMBOLS: type_str = "SYMBOLS"; break; | |
2043 | case LDC_ENTRY: type_str = "ENTRY"; break; | |
2044 | case LDC_FUNC_TABLE: type_str = "FUNC_TABLE"; break; | |
2045 | case LDC_GEN_INFO: type_str = "GEN_INFO"; break; | |
2046 | } | |
2047 | ||
2048 | fprintf (stderr, | |
2049 | "cmd %2d, sz: 0x%.2lx, coff: 0x%.3lx, doff: 0x%.6lx, dlen: 0x%.6lx", | |
2050 | number, | |
2051 | (long) load_hdr->hdr.ldci_cmd_size, | |
2052 | (long) offset, | |
2053 | (long) load_hdr->hdr.ldci_section_off, | |
2054 | (long) load_hdr->hdr.ldci_section_len); | |
2055 | ||
2056 | if (type_str == (char *)0) | |
2057 | fprintf (stderr, ", ty: unknown (%ld)\n", (long) type); | |
2058 | ||
2059 | else if (type != LDC_REGION) | |
2060 | fprintf (stderr, ", ty: %s\n", type_str); | |
2061 | ||
2062 | else | |
2063 | { | |
2064 | char *region = ""; | |
2065 | switch (load_hdr->region.regc_usage_type) | |
2066 | { | |
2067 | case REG_TEXT_T: region = ", .text"; break; | |
2068 | case REG_DATA_T: region = ", .data"; break; | |
2069 | case REG_BSS_T: region = ", .bss"; break; | |
2070 | case REG_GLUE_T: region = ", .glue"; break; | |
2071 | #if defined (REG_RDATA_T) && defined (REG_SDATA_T) && defined (REG_SBSS_T) /*mips*/ | |
2072 | case REG_RDATA_T: region = ", .rdata"; break; | |
2073 | case REG_SDATA_T: region = ", .sdata"; break; | |
2074 | case REG_SBSS_T: region = ", .sbss"; break; | |
2075 | #endif | |
2076 | } | |
2077 | ||
2078 | fprintf (stderr, ", ty: %s, vaddr: 0x%.8lx, vlen: 0x%.6lx%s\n", | |
2079 | type_str, | |
2080 | (long) load_hdr->region.regc_vm_addr, | |
2081 | (long) load_hdr->region.regc_vm_size, | |
2082 | region); | |
2083 | } | |
2084 | ||
2085 | return; | |
2086 | } | |
2087 | ||
2088 | \f | |
2089 | /* Fatal error when {en,de}code_mach_o_header fails. */ | |
2090 | ||
2091 | static void | |
2092 | bad_header (status) | |
2093 | int status; | |
2094 | { | |
2095 | char *msg = (char *)0; | |
2096 | ||
2097 | switch (status) | |
2098 | { | |
2099 | case MO_ERROR_BAD_MAGIC: msg = "bad magic number"; break; | |
2100 | case MO_ERROR_BAD_HDR_VERS: msg = "bad header version"; break; | |
2101 | case MO_ERROR_BAD_RAW_HDR_VERS: msg = "bad raw header version"; break; | |
2102 | case MO_ERROR_BUF2SML: msg = "raw header buffer too small"; break; | |
2103 | case MO_ERROR_OLD_RAW_HDR_FILE: msg = "old raw header file"; break; | |
2104 | case MO_ERROR_UNSUPPORTED_VERS: msg = "unsupported version"; break; | |
2105 | } | |
2106 | ||
2107 | if (msg == (char *)0) | |
2108 | fatal ("unknown {de,en}code_mach_o_hdr return value %d", status); | |
2109 | else | |
2110 | fatal ("%s", msg); | |
2111 | } | |
2112 | ||
2113 | \f | |
2114 | /* Read a file into a memory buffer. */ | |
2115 | ||
2116 | static struct file_info * | |
2117 | read_file (name, fd, rw) | |
2118 | char *name; /* filename */ | |
2119 | int fd; /* file descriptor */ | |
2120 | int rw; /* read/write */ | |
2121 | { | |
2122 | struct stat stat_pkt; | |
2123 | struct file_info *p = (struct file_info *) xcalloc (sizeof (struct file_info), 1); | |
2124 | #ifdef USE_MMAP | |
2125 | static int page_size; | |
2126 | #endif | |
2127 | ||
2128 | if (fstat (fd, &stat_pkt) < 0) | |
2129 | fatal_perror ("fstat %s", name); | |
2130 | ||
2131 | p->name = name; | |
2132 | p->size = stat_pkt.st_size; | |
2133 | p->rounded_size = stat_pkt.st_size; | |
2134 | p->fd = fd; | |
2135 | p->rw = rw; | |
2136 | ||
2137 | #ifdef USE_MMAP | |
2138 | if (debug) | |
2139 | fprintf (stderr, "mmap %s, %s\n", name, (rw) ? "read/write" : "read-only"); | |
2140 | ||
2141 | if (page_size == 0) | |
2142 | page_size = sysconf (_SC_PAGE_SIZE); | |
2143 | ||
2144 | p->rounded_size = ((p->size + page_size - 1) / page_size) * page_size; | |
2145 | p->start = mmap ((caddr_t)0, | |
2146 | (rw) ? p->rounded_size : p->size, | |
2147 | (rw) ? (PROT_READ | PROT_WRITE) : PROT_READ, | |
2148 | MAP_FILE | MAP_VARIABLE | MAP_SHARED, | |
2149 | fd, | |
2150 | 0L); | |
2151 | ||
2152 | if (p->start != (char *)0 && p->start != (char *)-1) | |
2153 | p->use_mmap = 1; | |
2154 | ||
2155 | else | |
2156 | #endif /* USE_MMAP */ | |
2157 | { | |
2158 | long len; | |
2159 | ||
2160 | if (debug) | |
2161 | fprintf (stderr, "read %s\n", name); | |
2162 | ||
2163 | p->use_mmap = 0; | |
2164 | p->start = xmalloc (p->size); | |
2165 | if (lseek (fd, 0L, SEEK_SET) < 0) | |
2166 | fatal_perror ("lseek to 0 on %s", name); | |
2167 | ||
2168 | len = read (fd, p->start, p->size); | |
2169 | if (len < 0) | |
2170 | fatal_perror ("read %s", name); | |
2171 | ||
2172 | if (len != p->size) | |
2173 | fatal ("read %ld bytes, expected %ld, from %s", len, p->size, name); | |
2174 | } | |
2175 | ||
2176 | return p; | |
2177 | } | |
2178 | ||
2179 | \f | |
2180 | /* Do anything necessary to write a file back from memory. */ | |
2181 | ||
2182 | static void | |
2183 | end_file (ptr) | |
2184 | struct file_info *ptr; /* file information block */ | |
2185 | { | |
2186 | #ifdef USE_MMAP | |
2187 | if (ptr->use_mmap) | |
2188 | { | |
2189 | if (ptr->rw) | |
2190 | { | |
2191 | if (debug) | |
2192 | fprintf (stderr, "msync %s\n", ptr->name); | |
2193 | ||
2194 | if (msync (ptr->start, ptr->rounded_size, MS_ASYNC)) | |
2195 | fatal_perror ("msync %s", ptr->name); | |
2196 | } | |
2197 | ||
2198 | if (debug) | |
2199 | fprintf (stderr, "munmap %s\n", ptr->name); | |
2200 | ||
2201 | if (munmap (ptr->start, ptr->size)) | |
2202 | fatal_perror ("munmap %s", ptr->name); | |
2203 | } | |
2204 | else | |
2205 | #endif /* USE_MMAP */ | |
2206 | { | |
2207 | if (ptr->rw) | |
2208 | { | |
2209 | long len; | |
2210 | ||
2211 | if (debug) | |
2212 | fprintf (stderr, "write %s\n", ptr->name); | |
2213 | ||
2214 | if (lseek (ptr->fd, 0L, SEEK_SET) < 0) | |
2215 | fatal_perror ("lseek to 0 on %s", ptr->name); | |
2216 | ||
2217 | len = write (ptr->fd, ptr->start, ptr->size); | |
2218 | if (len < 0) | |
2219 | fatal_perror ("read %s", ptr->name); | |
2220 | ||
2221 | if (len != ptr->size) | |
2222 | fatal ("wrote %ld bytes, expected %ld, to %s", len, ptr->size, ptr->name); | |
2223 | } | |
2224 | ||
2225 | free ((generic *)ptr->start); | |
2226 | } | |
2227 | ||
2228 | free ((generic *)ptr); | |
2229 | } | |
2230 | ||
2231 | #endif /* OBJECT_FORMAT_ROSE */ |