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1 | /* Collect static initialization info into data structures that can be | |
2 | traversed by C++ initialization and finalization routines. | |
3 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, | |
4 | 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. | |
5 | Contributed by Chris Smith (csmith@convex.com). | |
6 | Heavily modified by Michael Meissner (meissner@cygnus.com), | |
7 | Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com). | |
8 | ||
9 | This file is part of GCC. | |
10 | ||
11 | GCC is free software; you can redistribute it and/or modify it under | |
12 | the terms of the GNU General Public License as published by the Free | |
13 | Software Foundation; either version 2, or (at your option) any later | |
14 | version. | |
15 | ||
16 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
17 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with GCC; see the file COPYING. If not, write to the Free | |
23 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
24 | 02111-1307, USA. */ | |
25 | ||
26 | ||
27 | /* Build tables of static constructors and destructors and run ld. */ | |
28 | ||
29 | #include "config.h" | |
30 | #include "system.h" | |
31 | #include "coretypes.h" | |
32 | #include "tm.h" | |
33 | #include <signal.h> | |
34 | #if ! defined( SIGCHLD ) && defined( SIGCLD ) | |
35 | # define SIGCHLD SIGCLD | |
36 | #endif | |
37 | ||
38 | #ifdef vfork /* Autoconf may define this to fork for us. */ | |
39 | # define VFORK_STRING "fork" | |
40 | #else | |
41 | # define VFORK_STRING "vfork" | |
42 | #endif | |
43 | #ifdef HAVE_VFORK_H | |
44 | #include <vfork.h> | |
45 | #endif | |
46 | #ifdef VMS | |
47 | #define vfork() (decc$$alloc_vfork_blocks() >= 0 ? \ | |
48 | lib$get_current_invo_context(decc$$get_vfork_jmpbuf()) : -1) | |
49 | #endif /* VMS */ | |
50 | ||
51 | #ifndef LIBRARY_PATH_ENV | |
52 | #define LIBRARY_PATH_ENV "LIBRARY_PATH" | |
53 | #endif | |
54 | ||
55 | #define COLLECT | |
56 | ||
57 | #include "collect2.h" | |
58 | #include "demangle.h" | |
59 | #include "obstack.h" | |
60 | #include "intl.h" | |
61 | #include "version.h" | |
62 | \f | |
63 | /* On certain systems, we have code that works by scanning the object file | |
64 | directly. But this code uses system-specific header files and library | |
65 | functions, so turn it off in a cross-compiler. Likewise, the names of | |
66 | the utilities are not correct for a cross-compiler; we have to hope that | |
67 | cross-versions are in the proper directories. */ | |
68 | ||
69 | #ifdef CROSS_COMPILE | |
70 | #undef OBJECT_FORMAT_COFF | |
71 | #undef MD_EXEC_PREFIX | |
72 | #undef REAL_LD_FILE_NAME | |
73 | #undef REAL_NM_FILE_NAME | |
74 | #undef REAL_STRIP_FILE_NAME | |
75 | #endif | |
76 | ||
77 | /* If we cannot use a special method, use the ordinary one: | |
78 | run nm to find what symbols are present. | |
79 | In a cross-compiler, this means you need a cross nm, | |
80 | but that is not quite as unpleasant as special headers. */ | |
81 | ||
82 | #if !defined (OBJECT_FORMAT_COFF) | |
83 | #define OBJECT_FORMAT_NONE | |
84 | #endif | |
85 | ||
86 | #ifdef OBJECT_FORMAT_COFF | |
87 | ||
88 | #include <a.out.h> | |
89 | #include <ar.h> | |
90 | ||
91 | #ifdef UMAX | |
92 | #include <sgs.h> | |
93 | #endif | |
94 | ||
95 | /* Many versions of ldfcn.h define these. */ | |
96 | #ifdef FREAD | |
97 | #undef FREAD | |
98 | #undef FWRITE | |
99 | #endif | |
100 | ||
101 | #include <ldfcn.h> | |
102 | ||
103 | /* Some systems have an ISCOFF macro, but others do not. In some cases | |
104 | the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines | |
105 | that either do not have an ISCOFF macro in /usr/include or for those | |
106 | where it is wrong. */ | |
107 | ||
108 | #ifndef MY_ISCOFF | |
109 | #define MY_ISCOFF(X) ISCOFF (X) | |
110 | #endif | |
111 | ||
112 | #endif /* OBJECT_FORMAT_COFF */ | |
113 | ||
114 | #ifdef OBJECT_FORMAT_NONE | |
115 | ||
116 | /* Default flags to pass to nm. */ | |
117 | #ifndef NM_FLAGS | |
118 | #define NM_FLAGS "-n" | |
119 | #endif | |
120 | ||
121 | #endif /* OBJECT_FORMAT_NONE */ | |
122 | ||
123 | /* Some systems use __main in a way incompatible with its use in gcc, in these | |
124 | cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to | |
125 | give the same symbol without quotes for an alternative entry point. */ | |
126 | #ifndef NAME__MAIN | |
127 | #define NAME__MAIN "__main" | |
128 | #endif | |
129 | ||
130 | /* This must match tree.h. */ | |
131 | #define DEFAULT_INIT_PRIORITY 65535 | |
132 | ||
133 | #ifndef COLLECT_SHARED_INIT_FUNC | |
134 | #define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \ | |
135 | fprintf ((STREAM), "void _GLOBAL__DI() {\n\t%s();\n}\n", (FUNC)) | |
136 | #endif | |
137 | #ifndef COLLECT_SHARED_FINI_FUNC | |
138 | #define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \ | |
139 | fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC)) | |
140 | #endif | |
141 | ||
142 | #ifdef LDD_SUFFIX | |
143 | #define SCAN_LIBRARIES | |
144 | #endif | |
145 | ||
146 | #ifdef USE_COLLECT2 | |
147 | int do_collecting = 1; | |
148 | #else | |
149 | int do_collecting = 0; | |
150 | #endif | |
151 | ||
152 | #ifndef COLLECT_PARSE_FLAG | |
153 | #define COLLECT_PARSE_FLAG(FLAG) | |
154 | #endif | |
155 | ||
156 | /* Nonzero if we should suppress the automatic demangling of identifiers | |
157 | in linker error messages. Set from COLLECT_NO_DEMANGLE. */ | |
158 | int no_demangle; | |
159 | \f | |
160 | /* Linked lists of constructor and destructor names. */ | |
161 | ||
162 | struct id | |
163 | { | |
164 | struct id *next; | |
165 | int sequence; | |
166 | char name[1]; | |
167 | }; | |
168 | ||
169 | struct head | |
170 | { | |
171 | struct id *first; | |
172 | struct id *last; | |
173 | int number; | |
174 | }; | |
175 | ||
176 | /* Enumeration giving which pass this is for scanning the program file. */ | |
177 | ||
178 | enum pass { | |
179 | PASS_FIRST, /* without constructors */ | |
180 | PASS_OBJ, /* individual objects */ | |
181 | PASS_LIB, /* looking for shared libraries */ | |
182 | PASS_SECOND /* with constructors linked in */ | |
183 | }; | |
184 | ||
185 | int vflag; /* true if -v */ | |
186 | static int rflag; /* true if -r */ | |
187 | static int strip_flag; /* true if -s */ | |
188 | #ifdef COLLECT_EXPORT_LIST | |
189 | static int export_flag; /* true if -bE */ | |
190 | static int aix64_flag; /* true if -b64 */ | |
191 | #endif | |
192 | ||
193 | int debug; /* true if -debug */ | |
194 | ||
195 | static int shared_obj; /* true if -shared */ | |
196 | ||
197 | static const char *c_file; /* <xxx>.c for constructor/destructor list. */ | |
198 | static const char *o_file; /* <xxx>.o for constructor/destructor list. */ | |
199 | #ifdef COLLECT_EXPORT_LIST | |
200 | static const char *export_file; /* <xxx>.x for AIX export list. */ | |
201 | #endif | |
202 | const char *ldout; /* File for ld errors. */ | |
203 | static const char *output_file; /* Output file for ld. */ | |
204 | static const char *nm_file_name; /* pathname of nm */ | |
205 | #ifdef LDD_SUFFIX | |
206 | static const char *ldd_file_name; /* pathname of ldd (or equivalent) */ | |
207 | #endif | |
208 | static const char *strip_file_name; /* pathname of strip */ | |
209 | const char *c_file_name; /* pathname of gcc */ | |
210 | static char *initname, *fininame; /* names of init and fini funcs */ | |
211 | ||
212 | static struct head constructors; /* list of constructors found */ | |
213 | static struct head destructors; /* list of destructors found */ | |
214 | #ifdef COLLECT_EXPORT_LIST | |
215 | static struct head exports; /* list of exported symbols */ | |
216 | #endif | |
217 | static struct head frame_tables; /* list of frame unwind info tables */ | |
218 | ||
219 | struct obstack temporary_obstack; | |
220 | char * temporary_firstobj; | |
221 | ||
222 | /* Holds the return value of pexecute and fork. */ | |
223 | int pid; | |
224 | ||
225 | /* Structure to hold all the directories in which to search for files to | |
226 | execute. */ | |
227 | ||
228 | struct prefix_list | |
229 | { | |
230 | const char *prefix; /* String to prepend to the path. */ | |
231 | struct prefix_list *next; /* Next in linked list. */ | |
232 | }; | |
233 | ||
234 | struct path_prefix | |
235 | { | |
236 | struct prefix_list *plist; /* List of prefixes to try */ | |
237 | int max_len; /* Max length of a prefix in PLIST */ | |
238 | const char *name; /* Name of this list (used in config stuff) */ | |
239 | }; | |
240 | ||
241 | #ifdef COLLECT_EXPORT_LIST | |
242 | /* Lists to keep libraries to be scanned for global constructors/destructors. */ | |
243 | static struct head libs; /* list of libraries */ | |
244 | static struct path_prefix cmdline_lib_dirs; /* directories specified with -L */ | |
245 | static struct path_prefix libpath_lib_dirs; /* directories in LIBPATH */ | |
246 | static struct path_prefix *libpaths[3] = {&cmdline_lib_dirs, | |
247 | &libpath_lib_dirs, NULL}; | |
248 | static const char *const libexts[3] = {"a", "so", NULL}; /* possible library extensions */ | |
249 | #endif | |
250 | ||
251 | static void handler (int); | |
252 | static int is_ctor_dtor (const char *); | |
253 | static char *find_a_file (struct path_prefix *, const char *); | |
254 | static void add_prefix (struct path_prefix *, const char *); | |
255 | static void prefix_from_env (const char *, struct path_prefix *); | |
256 | static void prefix_from_string (const char *, struct path_prefix *); | |
257 | static void do_wait (const char *); | |
258 | static void fork_execute (const char *, char **); | |
259 | static void maybe_unlink (const char *); | |
260 | static void add_to_list (struct head *, const char *); | |
261 | static int extract_init_priority (const char *); | |
262 | static void sort_ids (struct head *); | |
263 | static void write_list (FILE *, const char *, struct id *); | |
264 | #ifdef COLLECT_EXPORT_LIST | |
265 | static void dump_list (FILE *, const char *, struct id *); | |
266 | #endif | |
267 | #if 0 | |
268 | static void dump_prefix_list (FILE *, const char *, struct prefix_list *); | |
269 | #endif | |
270 | static void write_list_with_asm (FILE *, const char *, struct id *); | |
271 | static void write_c_file (FILE *, const char *); | |
272 | static void write_c_file_stat (FILE *, const char *); | |
273 | #ifndef LD_INIT_SWITCH | |
274 | static void write_c_file_glob (FILE *, const char *); | |
275 | #endif | |
276 | static void scan_prog_file (const char *, enum pass); | |
277 | #ifdef SCAN_LIBRARIES | |
278 | static void scan_libraries (const char *); | |
279 | #endif | |
280 | #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES | |
281 | static int is_in_args (const char *, const char **, const char **); | |
282 | #endif | |
283 | #ifdef COLLECT_EXPORT_LIST | |
284 | #if 0 | |
285 | static int is_in_list (const char *, struct id *); | |
286 | #endif | |
287 | static void write_aix_file (FILE *, struct id *); | |
288 | static char *resolve_lib_name (const char *); | |
289 | #endif | |
290 | static char *extract_string (const char **); | |
291 | \f | |
292 | #ifndef HAVE_DUP2 | |
293 | static int | |
294 | dup2 (int oldfd, int newfd) | |
295 | { | |
296 | int fdtmp[256]; | |
297 | int fdx = 0; | |
298 | int fd; | |
299 | ||
300 | if (oldfd == newfd) | |
301 | return oldfd; | |
302 | close (newfd); | |
303 | while ((fd = dup (oldfd)) != newfd && fd >= 0) /* good enough for low fd's */ | |
304 | fdtmp[fdx++] = fd; | |
305 | while (fdx > 0) | |
306 | close (fdtmp[--fdx]); | |
307 | ||
308 | return fd; | |
309 | } | |
310 | #endif /* ! HAVE_DUP2 */ | |
311 | \f | |
312 | /* Delete tempfiles and exit function. */ | |
313 | ||
314 | void | |
315 | collect_exit (int status) | |
316 | { | |
317 | if (c_file != 0 && c_file[0]) | |
318 | maybe_unlink (c_file); | |
319 | ||
320 | if (o_file != 0 && o_file[0]) | |
321 | maybe_unlink (o_file); | |
322 | ||
323 | #ifdef COLLECT_EXPORT_LIST | |
324 | if (export_file != 0 && export_file[0]) | |
325 | maybe_unlink (export_file); | |
326 | #endif | |
327 | ||
328 | if (ldout != 0 && ldout[0]) | |
329 | { | |
330 | dump_file (ldout); | |
331 | maybe_unlink (ldout); | |
332 | } | |
333 | ||
334 | if (status != 0 && output_file != 0 && output_file[0]) | |
335 | maybe_unlink (output_file); | |
336 | ||
337 | exit (status); | |
338 | } | |
339 | ||
340 | \f | |
341 | /* Notify user of a non-error. */ | |
342 | void | |
343 | notice (const char *msgid, ...) | |
344 | { | |
345 | va_list ap; | |
346 | ||
347 | va_start (ap, msgid); | |
348 | vfprintf (stderr, _(msgid), ap); | |
349 | va_end (ap); | |
350 | } | |
351 | ||
352 | /* Die when sys call fails. */ | |
353 | ||
354 | void | |
355 | fatal_perror (const char * msgid, ...) | |
356 | { | |
357 | int e = errno; | |
358 | va_list ap; | |
359 | ||
360 | va_start (ap, msgid); | |
361 | fprintf (stderr, "collect2: "); | |
362 | vfprintf (stderr, _(msgid), ap); | |
363 | fprintf (stderr, ": %s\n", xstrerror (e)); | |
364 | va_end (ap); | |
365 | ||
366 | collect_exit (FATAL_EXIT_CODE); | |
367 | } | |
368 | ||
369 | /* Just die. */ | |
370 | ||
371 | void | |
372 | fatal (const char * msgid, ...) | |
373 | { | |
374 | va_list ap; | |
375 | ||
376 | va_start (ap, msgid); | |
377 | fprintf (stderr, "collect2: "); | |
378 | vfprintf (stderr, _(msgid), ap); | |
379 | fprintf (stderr, "\n"); | |
380 | va_end (ap); | |
381 | ||
382 | collect_exit (FATAL_EXIT_CODE); | |
383 | } | |
384 | ||
385 | /* Write error message. */ | |
386 | ||
387 | void | |
388 | error (const char * msgid, ...) | |
389 | { | |
390 | va_list ap; | |
391 | ||
392 | va_start (ap, msgid); | |
393 | fprintf (stderr, "collect2: "); | |
394 | vfprintf (stderr, _(msgid), ap); | |
395 | fprintf (stderr, "\n"); | |
396 | va_end(ap); | |
397 | } | |
398 | ||
399 | /* In case obstack is linked in, and abort is defined to fancy_abort, | |
400 | provide a default entry. */ | |
401 | ||
402 | void | |
403 | fancy_abort (void) | |
404 | { | |
405 | fatal ("internal error"); | |
406 | } | |
407 | \f | |
408 | static void | |
409 | handler (int signo) | |
410 | { | |
411 | if (c_file != 0 && c_file[0]) | |
412 | maybe_unlink (c_file); | |
413 | ||
414 | if (o_file != 0 && o_file[0]) | |
415 | maybe_unlink (o_file); | |
416 | ||
417 | if (ldout != 0 && ldout[0]) | |
418 | maybe_unlink (ldout); | |
419 | ||
420 | #ifdef COLLECT_EXPORT_LIST | |
421 | if (export_file != 0 && export_file[0]) | |
422 | maybe_unlink (export_file); | |
423 | #endif | |
424 | ||
425 | signal (signo, SIG_DFL); | |
426 | kill (getpid (), signo); | |
427 | } | |
428 | ||
429 | \f | |
430 | int | |
431 | file_exists (const char *name) | |
432 | { | |
433 | return access (name, R_OK) == 0; | |
434 | } | |
435 | ||
436 | /* Parse a reasonable subset of shell quoting syntax. */ | |
437 | ||
438 | static char * | |
439 | extract_string (const char **pp) | |
440 | { | |
441 | const char *p = *pp; | |
442 | int backquote = 0; | |
443 | int inside = 0; | |
444 | ||
445 | for (;;) | |
446 | { | |
447 | char c = *p; | |
448 | if (c == '\0') | |
449 | break; | |
450 | ++p; | |
451 | if (backquote) | |
452 | obstack_1grow (&temporary_obstack, c); | |
453 | else if (! inside && c == ' ') | |
454 | break; | |
455 | else if (! inside && c == '\\') | |
456 | backquote = 1; | |
457 | else if (c == '\'') | |
458 | inside = !inside; | |
459 | else | |
460 | obstack_1grow (&temporary_obstack, c); | |
461 | } | |
462 | ||
463 | obstack_1grow (&temporary_obstack, '\0'); | |
464 | *pp = p; | |
465 | return obstack_finish (&temporary_obstack); | |
466 | } | |
467 | \f | |
468 | void | |
469 | dump_file (const char *name) | |
470 | { | |
471 | FILE *stream = fopen (name, "r"); | |
472 | ||
473 | if (stream == 0) | |
474 | return; | |
475 | while (1) | |
476 | { | |
477 | int c; | |
478 | while (c = getc (stream), | |
479 | c != EOF && (ISIDNUM (c) || c == '$' || c == '.')) | |
480 | obstack_1grow (&temporary_obstack, c); | |
481 | if (obstack_object_size (&temporary_obstack) > 0) | |
482 | { | |
483 | const char *word, *p; | |
484 | char *result; | |
485 | obstack_1grow (&temporary_obstack, '\0'); | |
486 | word = obstack_finish (&temporary_obstack); | |
487 | ||
488 | if (*word == '.') | |
489 | ++word, putc ('.', stderr); | |
490 | p = word; | |
491 | if (!strncmp (p, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX))) | |
492 | p += strlen (USER_LABEL_PREFIX); | |
493 | ||
494 | if (no_demangle) | |
495 | result = 0; | |
496 | else | |
497 | result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE); | |
498 | ||
499 | if (result) | |
500 | { | |
501 | int diff; | |
502 | fputs (result, stderr); | |
503 | ||
504 | diff = strlen (word) - strlen (result); | |
505 | while (diff > 0 && c == ' ') | |
506 | --diff, putc (' ', stderr); | |
507 | while (diff < 0 && c == ' ') | |
508 | ++diff, c = getc (stream); | |
509 | ||
510 | free (result); | |
511 | } | |
512 | else | |
513 | fputs (word, stderr); | |
514 | ||
515 | fflush (stderr); | |
516 | obstack_free (&temporary_obstack, temporary_firstobj); | |
517 | } | |
518 | if (c == EOF) | |
519 | break; | |
520 | putc (c, stderr); | |
521 | } | |
522 | fclose (stream); | |
523 | } | |
524 | \f | |
525 | /* Decide whether the given symbol is: a constructor (1), a destructor | |
526 | (2), a routine in a shared object that calls all the constructors | |
527 | (3) or destructors (4), a DWARF exception-handling table (5), or | |
528 | nothing special (0). */ | |
529 | ||
530 | static int | |
531 | is_ctor_dtor (const char *s) | |
532 | { | |
533 | struct names { const char *const name; const int len; const int ret; | |
534 | const int two_underscores; }; | |
535 | ||
536 | const struct names *p; | |
537 | int ch; | |
538 | const char *orig_s = s; | |
539 | ||
540 | static const struct names special[] = { | |
541 | #ifndef NO_DOLLAR_IN_LABEL | |
542 | { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, 1, 0 }, | |
543 | { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, 2, 0 }, | |
544 | #else | |
545 | #ifndef NO_DOT_IN_LABEL | |
546 | { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, 1, 0 }, | |
547 | { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, 2, 0 }, | |
548 | #endif /* NO_DOT_IN_LABEL */ | |
549 | #endif /* NO_DOLLAR_IN_LABEL */ | |
550 | { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, 1, 0 }, | |
551 | { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, 2, 0 }, | |
552 | { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, 5, 0 }, | |
553 | { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, 3, 0 }, | |
554 | { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, 4, 0 }, | |
555 | { NULL, 0, 0, 0 } | |
556 | }; | |
557 | ||
558 | while ((ch = *s) == '_') | |
559 | ++s; | |
560 | ||
561 | if (s == orig_s) | |
562 | return 0; | |
563 | ||
564 | for (p = &special[0]; p->len > 0; p++) | |
565 | { | |
566 | if (ch == p->name[0] | |
567 | && (!p->two_underscores || ((s - orig_s) >= 2)) | |
568 | && strncmp(s, p->name, p->len) == 0) | |
569 | { | |
570 | return p->ret; | |
571 | } | |
572 | } | |
573 | return 0; | |
574 | } | |
575 | \f | |
576 | /* We maintain two prefix lists: one from COMPILER_PATH environment variable | |
577 | and one from the PATH variable. */ | |
578 | ||
579 | static struct path_prefix cpath, path; | |
580 | ||
581 | #ifdef CROSS_COMPILE | |
582 | /* This is the name of the target machine. We use it to form the name | |
583 | of the files to execute. */ | |
584 | ||
585 | static const char *const target_machine = TARGET_MACHINE; | |
586 | #endif | |
587 | ||
588 | /* Search for NAME using prefix list PPREFIX. We only look for executable | |
589 | files. | |
590 | ||
591 | Return 0 if not found, otherwise return its name, allocated with malloc. */ | |
592 | ||
593 | static char * | |
594 | find_a_file (struct path_prefix *pprefix, const char *name) | |
595 | { | |
596 | char *temp; | |
597 | struct prefix_list *pl; | |
598 | int len = pprefix->max_len + strlen (name) + 1; | |
599 | ||
600 | if (debug) | |
601 | fprintf (stderr, "Looking for '%s'\n", name); | |
602 | ||
603 | #ifdef HOST_EXECUTABLE_SUFFIX | |
604 | len += strlen (HOST_EXECUTABLE_SUFFIX); | |
605 | #endif | |
606 | ||
607 | temp = xmalloc (len); | |
608 | ||
609 | /* Determine the filename to execute (special case for absolute paths). */ | |
610 | ||
611 | if (*name == '/' | |
612 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM | |
613 | || (*name && name[1] == ':') | |
614 | #endif | |
615 | ) | |
616 | { | |
617 | if (access (name, X_OK) == 0) | |
618 | { | |
619 | strcpy (temp, name); | |
620 | ||
621 | if (debug) | |
622 | fprintf (stderr, " - found: absolute path\n"); | |
623 | ||
624 | return temp; | |
625 | } | |
626 | ||
627 | #ifdef HOST_EXECUTABLE_SUFFIX | |
628 | /* Some systems have a suffix for executable files. | |
629 | So try appending that. */ | |
630 | strcpy (temp, name); | |
631 | strcat (temp, HOST_EXECUTABLE_SUFFIX); | |
632 | ||
633 | if (access (temp, X_OK) == 0) | |
634 | return temp; | |
635 | #endif | |
636 | ||
637 | if (debug) | |
638 | fprintf (stderr, " - failed to locate using absolute path\n"); | |
639 | } | |
640 | else | |
641 | for (pl = pprefix->plist; pl; pl = pl->next) | |
642 | { | |
643 | struct stat st; | |
644 | ||
645 | strcpy (temp, pl->prefix); | |
646 | strcat (temp, name); | |
647 | ||
648 | if (stat (temp, &st) >= 0 | |
649 | && ! S_ISDIR (st.st_mode) | |
650 | && access (temp, X_OK) == 0) | |
651 | return temp; | |
652 | ||
653 | #ifdef HOST_EXECUTABLE_SUFFIX | |
654 | /* Some systems have a suffix for executable files. | |
655 | So try appending that. */ | |
656 | strcat (temp, HOST_EXECUTABLE_SUFFIX); | |
657 | ||
658 | if (stat (temp, &st) >= 0 | |
659 | && ! S_ISDIR (st.st_mode) | |
660 | && access (temp, X_OK) == 0) | |
661 | return temp; | |
662 | #endif | |
663 | } | |
664 | ||
665 | if (debug && pprefix->plist == NULL) | |
666 | fprintf (stderr, " - failed: no entries in prefix list\n"); | |
667 | ||
668 | free (temp); | |
669 | return 0; | |
670 | } | |
671 | ||
672 | /* Add an entry for PREFIX to prefix list PPREFIX. */ | |
673 | ||
674 | static void | |
675 | add_prefix (struct path_prefix *pprefix, const char *prefix) | |
676 | { | |
677 | struct prefix_list *pl, **prev; | |
678 | int len; | |
679 | ||
680 | if (pprefix->plist) | |
681 | { | |
682 | for (pl = pprefix->plist; pl->next; pl = pl->next) | |
683 | ; | |
684 | prev = &pl->next; | |
685 | } | |
686 | else | |
687 | prev = &pprefix->plist; | |
688 | ||
689 | /* Keep track of the longest prefix. */ | |
690 | ||
691 | len = strlen (prefix); | |
692 | if (len > pprefix->max_len) | |
693 | pprefix->max_len = len; | |
694 | ||
695 | pl = xmalloc (sizeof (struct prefix_list)); | |
696 | pl->prefix = xstrdup (prefix); | |
697 | ||
698 | if (*prev) | |
699 | pl->next = *prev; | |
700 | else | |
701 | pl->next = (struct prefix_list *) 0; | |
702 | *prev = pl; | |
703 | } | |
704 | \f | |
705 | /* Take the value of the environment variable ENV, break it into a path, and | |
706 | add of the entries to PPREFIX. */ | |
707 | ||
708 | static void | |
709 | prefix_from_env (const char *env, struct path_prefix *pprefix) | |
710 | { | |
711 | const char *p; | |
712 | GET_ENVIRONMENT (p, env); | |
713 | ||
714 | if (p) | |
715 | prefix_from_string (p, pprefix); | |
716 | } | |
717 | ||
718 | static void | |
719 | prefix_from_string (const char *p, struct path_prefix *pprefix) | |
720 | { | |
721 | const char *startp, *endp; | |
722 | char *nstore = xmalloc (strlen (p) + 3); | |
723 | ||
724 | if (debug) | |
725 | fprintf (stderr, "Convert string '%s' into prefixes, separator = '%c'\n", p, PATH_SEPARATOR); | |
726 | ||
727 | startp = endp = p; | |
728 | while (1) | |
729 | { | |
730 | if (*endp == PATH_SEPARATOR || *endp == 0) | |
731 | { | |
732 | strncpy (nstore, startp, endp-startp); | |
733 | if (endp == startp) | |
734 | { | |
735 | strcpy (nstore, "./"); | |
736 | } | |
737 | else if (! IS_DIR_SEPARATOR (endp[-1])) | |
738 | { | |
739 | nstore[endp-startp] = DIR_SEPARATOR; | |
740 | nstore[endp-startp+1] = 0; | |
741 | } | |
742 | else | |
743 | nstore[endp-startp] = 0; | |
744 | ||
745 | if (debug) | |
746 | fprintf (stderr, " - add prefix: %s\n", nstore); | |
747 | ||
748 | add_prefix (pprefix, nstore); | |
749 | if (*endp == 0) | |
750 | break; | |
751 | endp = startp = endp + 1; | |
752 | } | |
753 | else | |
754 | endp++; | |
755 | } | |
756 | } | |
757 | \f | |
758 | /* Main program. */ | |
759 | ||
760 | int | |
761 | main (int argc, char **argv) | |
762 | { | |
763 | static const char *const ld_suffix = "ld"; | |
764 | static const char *const real_ld_suffix = "real-ld"; | |
765 | static const char *const collect_ld_suffix = "collect-ld"; | |
766 | static const char *const nm_suffix = "nm"; | |
767 | static const char *const gnm_suffix = "gnm"; | |
768 | #ifdef LDD_SUFFIX | |
769 | static const char *const ldd_suffix = LDD_SUFFIX; | |
770 | #endif | |
771 | static const char *const strip_suffix = "strip"; | |
772 | static const char *const gstrip_suffix = "gstrip"; | |
773 | ||
774 | #ifdef CROSS_COMPILE | |
775 | /* If we look for a program in the compiler directories, we just use | |
776 | the short name, since these directories are already system-specific. | |
777 | But it we look for a program in the system directories, we need to | |
778 | qualify the program name with the target machine. */ | |
779 | ||
780 | const char *const full_ld_suffix = | |
781 | concat(target_machine, "-", ld_suffix, NULL); | |
782 | const char *const full_nm_suffix = | |
783 | concat (target_machine, "-", nm_suffix, NULL); | |
784 | const char *const full_gnm_suffix = | |
785 | concat (target_machine, "-", gnm_suffix, NULL); | |
786 | #ifdef LDD_SUFFIX | |
787 | const char *const full_ldd_suffix = | |
788 | concat (target_machine, "-", ldd_suffix, NULL); | |
789 | #endif | |
790 | const char *const full_strip_suffix = | |
791 | concat (target_machine, "-", strip_suffix, NULL); | |
792 | const char *const full_gstrip_suffix = | |
793 | concat (target_machine, "-", gstrip_suffix, NULL); | |
794 | #else | |
795 | const char *const full_ld_suffix = ld_suffix; | |
796 | const char *const full_nm_suffix = nm_suffix; | |
797 | const char *const full_gnm_suffix = gnm_suffix; | |
798 | #ifdef LDD_SUFFIX | |
799 | const char *const full_ldd_suffix = ldd_suffix; | |
800 | #endif | |
801 | const char *const full_strip_suffix = strip_suffix; | |
802 | const char *const full_gstrip_suffix = gstrip_suffix; | |
803 | #endif /* CROSS_COMPILE */ | |
804 | ||
805 | const char *arg; | |
806 | FILE *outf; | |
807 | #ifdef COLLECT_EXPORT_LIST | |
808 | FILE *exportf; | |
809 | #endif | |
810 | const char *ld_file_name; | |
811 | const char *p; | |
812 | char **c_argv; | |
813 | const char **c_ptr; | |
814 | char **ld1_argv; | |
815 | const char **ld1; | |
816 | char **ld2_argv; | |
817 | const char **ld2; | |
818 | char **object_lst; | |
819 | const char **object; | |
820 | int first_file; | |
821 | int num_c_args = argc+9; | |
822 | ||
823 | no_demangle = !! getenv ("COLLECT_NO_DEMANGLE"); | |
824 | ||
825 | /* Suppress demangling by the real linker, which may be broken. */ | |
826 | putenv (xstrdup ("COLLECT_NO_DEMANGLE=")); | |
827 | ||
828 | #if defined (COLLECT2_HOST_INITIALIZATION) | |
829 | /* Perform system dependent initialization, if necessary. */ | |
830 | COLLECT2_HOST_INITIALIZATION; | |
831 | #endif | |
832 | ||
833 | #ifdef SIGCHLD | |
834 | /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will | |
835 | receive the signal. A different setting is inheritable */ | |
836 | signal (SIGCHLD, SIG_DFL); | |
837 | #endif | |
838 | ||
839 | gcc_init_libintl (); | |
840 | ||
841 | /* Do not invoke xcalloc before this point, since locale needs to be | |
842 | set first, in case a diagnostic is issued. */ | |
843 | ||
844 | ld1 = (const char **)(ld1_argv = xcalloc(sizeof (char *), argc+3)); | |
845 | ld2 = (const char **)(ld2_argv = xcalloc(sizeof (char *), argc+10)); | |
846 | object = (const char **)(object_lst = xcalloc(sizeof (char *), argc)); | |
847 | ||
848 | #ifdef DEBUG | |
849 | debug = 1; | |
850 | #endif | |
851 | ||
852 | /* Parse command line early for instances of -debug. This allows | |
853 | the debug flag to be set before functions like find_a_file() | |
854 | are called. */ | |
855 | { | |
856 | int i; | |
857 | ||
858 | for (i = 1; argv[i] != NULL; i ++) | |
859 | { | |
860 | if (! strcmp (argv[i], "-debug")) | |
861 | debug = 1; | |
862 | COLLECT_PARSE_FLAG (argv[i]); | |
863 | } | |
864 | vflag = debug; | |
865 | } | |
866 | ||
867 | #ifndef DEFAULT_A_OUT_NAME | |
868 | output_file = "a.out"; | |
869 | #else | |
870 | output_file = DEFAULT_A_OUT_NAME; | |
871 | #endif | |
872 | ||
873 | obstack_begin (&temporary_obstack, 0); | |
874 | temporary_firstobj = obstack_alloc (&temporary_obstack, 0); | |
875 | ||
876 | current_demangling_style = auto_demangling; | |
877 | p = getenv ("COLLECT_GCC_OPTIONS"); | |
878 | while (p && *p) | |
879 | { | |
880 | const char *q = extract_string (&p); | |
881 | if (*q == '-' && (q[1] == 'm' || q[1] == 'f')) | |
882 | num_c_args++; | |
883 | } | |
884 | obstack_free (&temporary_obstack, temporary_firstobj); | |
885 | ||
886 | /* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities | |
887 | -fno-exceptions -w */ | |
888 | num_c_args += 5; | |
889 | ||
890 | c_ptr = (const char **) (c_argv = xcalloc (sizeof (char *), num_c_args)); | |
891 | ||
892 | if (argc < 2) | |
893 | fatal ("no arguments"); | |
894 | ||
895 | #ifdef SIGQUIT | |
896 | if (signal (SIGQUIT, SIG_IGN) != SIG_IGN) | |
897 | signal (SIGQUIT, handler); | |
898 | #endif | |
899 | if (signal (SIGINT, SIG_IGN) != SIG_IGN) | |
900 | signal (SIGINT, handler); | |
901 | #ifdef SIGALRM | |
902 | if (signal (SIGALRM, SIG_IGN) != SIG_IGN) | |
903 | signal (SIGALRM, handler); | |
904 | #endif | |
905 | #ifdef SIGHUP | |
906 | if (signal (SIGHUP, SIG_IGN) != SIG_IGN) | |
907 | signal (SIGHUP, handler); | |
908 | #endif | |
909 | if (signal (SIGSEGV, SIG_IGN) != SIG_IGN) | |
910 | signal (SIGSEGV, handler); | |
911 | #ifdef SIGBUS | |
912 | if (signal (SIGBUS, SIG_IGN) != SIG_IGN) | |
913 | signal (SIGBUS, handler); | |
914 | #endif | |
915 | ||
916 | /* Extract COMPILER_PATH and PATH into our prefix list. */ | |
917 | prefix_from_env ("COMPILER_PATH", &cpath); | |
918 | prefix_from_env ("PATH", &path); | |
919 | ||
920 | /* Try to discover a valid linker/nm/strip to use. */ | |
921 | ||
922 | /* Maybe we know the right file to use (if not cross). */ | |
923 | ld_file_name = 0; | |
924 | #ifdef DEFAULT_LINKER | |
925 | if (access (DEFAULT_LINKER, X_OK) == 0) | |
926 | ld_file_name = DEFAULT_LINKER; | |
927 | if (ld_file_name == 0) | |
928 | #endif | |
929 | #ifdef REAL_LD_FILE_NAME | |
930 | ld_file_name = find_a_file (&path, REAL_LD_FILE_NAME); | |
931 | if (ld_file_name == 0) | |
932 | #endif | |
933 | /* Search the (target-specific) compiler dirs for ld'. */ | |
934 | ld_file_name = find_a_file (&cpath, real_ld_suffix); | |
935 | /* Likewise for `collect-ld'. */ | |
936 | if (ld_file_name == 0) | |
937 | ld_file_name = find_a_file (&cpath, collect_ld_suffix); | |
938 | /* Search the compiler directories for `ld'. We have protection against | |
939 | recursive calls in find_a_file. */ | |
940 | if (ld_file_name == 0) | |
941 | ld_file_name = find_a_file (&cpath, ld_suffix); | |
942 | /* Search the ordinary system bin directories | |
943 | for `ld' (if native linking) or `TARGET-ld' (if cross). */ | |
944 | if (ld_file_name == 0) | |
945 | ld_file_name = find_a_file (&path, full_ld_suffix); | |
946 | ||
947 | #ifdef REAL_NM_FILE_NAME | |
948 | nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME); | |
949 | if (nm_file_name == 0) | |
950 | #endif | |
951 | nm_file_name = find_a_file (&cpath, gnm_suffix); | |
952 | if (nm_file_name == 0) | |
953 | nm_file_name = find_a_file (&path, full_gnm_suffix); | |
954 | if (nm_file_name == 0) | |
955 | nm_file_name = find_a_file (&cpath, nm_suffix); | |
956 | if (nm_file_name == 0) | |
957 | nm_file_name = find_a_file (&path, full_nm_suffix); | |
958 | ||
959 | #ifdef LDD_SUFFIX | |
960 | ldd_file_name = find_a_file (&cpath, ldd_suffix); | |
961 | if (ldd_file_name == 0) | |
962 | ldd_file_name = find_a_file (&path, full_ldd_suffix); | |
963 | #endif | |
964 | ||
965 | #ifdef REAL_STRIP_FILE_NAME | |
966 | strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME); | |
967 | if (strip_file_name == 0) | |
968 | #endif | |
969 | strip_file_name = find_a_file (&cpath, gstrip_suffix); | |
970 | if (strip_file_name == 0) | |
971 | strip_file_name = find_a_file (&path, full_gstrip_suffix); | |
972 | if (strip_file_name == 0) | |
973 | strip_file_name = find_a_file (&cpath, strip_suffix); | |
974 | if (strip_file_name == 0) | |
975 | strip_file_name = find_a_file (&path, full_strip_suffix); | |
976 | ||
977 | /* Determine the full path name of the C compiler to use. */ | |
978 | c_file_name = getenv ("COLLECT_GCC"); | |
979 | if (c_file_name == 0) | |
980 | { | |
981 | #ifdef CROSS_COMPILE | |
982 | c_file_name = concat (target_machine, "-gcc", NULL); | |
983 | #else | |
984 | c_file_name = "gcc"; | |
985 | #endif | |
986 | } | |
987 | ||
988 | p = find_a_file (&cpath, c_file_name); | |
989 | ||
990 | /* Here it should be safe to use the system search path since we should have | |
991 | already qualified the name of the compiler when it is needed. */ | |
992 | if (p == 0) | |
993 | p = find_a_file (&path, c_file_name); | |
994 | ||
995 | if (p) | |
996 | c_file_name = p; | |
997 | ||
998 | *ld1++ = *ld2++ = ld_file_name; | |
999 | ||
1000 | /* Make temp file names. */ | |
1001 | c_file = make_temp_file (".c"); | |
1002 | o_file = make_temp_file (".o"); | |
1003 | #ifdef COLLECT_EXPORT_LIST | |
1004 | export_file = make_temp_file (".x"); | |
1005 | #endif | |
1006 | ldout = make_temp_file (".ld"); | |
1007 | *c_ptr++ = c_file_name; | |
1008 | *c_ptr++ = "-x"; | |
1009 | *c_ptr++ = "c"; | |
1010 | *c_ptr++ = "-c"; | |
1011 | *c_ptr++ = "-o"; | |
1012 | *c_ptr++ = o_file; | |
1013 | ||
1014 | #ifdef COLLECT_EXPORT_LIST | |
1015 | /* Generate a list of directories from LIBPATH. */ | |
1016 | prefix_from_env ("LIBPATH", &libpath_lib_dirs); | |
1017 | /* Add to this list also two standard directories where | |
1018 | AIX loader always searches for libraries. */ | |
1019 | add_prefix (&libpath_lib_dirs, "/lib"); | |
1020 | add_prefix (&libpath_lib_dirs, "/usr/lib"); | |
1021 | #endif | |
1022 | ||
1023 | /* Get any options that the upper GCC wants to pass to the sub-GCC. | |
1024 | ||
1025 | AIX support needs to know if -shared has been specified before | |
1026 | parsing commandline arguments. */ | |
1027 | ||
1028 | p = getenv ("COLLECT_GCC_OPTIONS"); | |
1029 | while (p && *p) | |
1030 | { | |
1031 | const char *q = extract_string (&p); | |
1032 | if (*q == '-' && (q[1] == 'm' || q[1] == 'f')) | |
1033 | *c_ptr++ = xstrdup (q); | |
1034 | if (strcmp (q, "-EL") == 0 || strcmp (q, "-EB") == 0) | |
1035 | *c_ptr++ = xstrdup (q); | |
1036 | if (strcmp (q, "-shared") == 0) | |
1037 | shared_obj = 1; | |
1038 | if (*q == '-' && q[1] == 'B') | |
1039 | { | |
1040 | *c_ptr++ = xstrdup (q); | |
1041 | if (q[2] == 0) | |
1042 | { | |
1043 | q = extract_string (&p); | |
1044 | *c_ptr++ = xstrdup (q); | |
1045 | } | |
1046 | } | |
1047 | } | |
1048 | obstack_free (&temporary_obstack, temporary_firstobj); | |
1049 | *c_ptr++ = "-fno-profile-arcs"; | |
1050 | *c_ptr++ = "-fno-test-coverage"; | |
1051 | *c_ptr++ = "-fno-branch-probabilities"; | |
1052 | *c_ptr++ = "-fno-exceptions"; | |
1053 | *c_ptr++ = "-w"; | |
1054 | ||
1055 | /* !!! When GCC calls collect2, | |
1056 | it does not know whether it is calling collect2 or ld. | |
1057 | So collect2 cannot meaningfully understand any options | |
1058 | except those ld understands. | |
1059 | If you propose to make GCC pass some other option, | |
1060 | just imagine what will happen if ld is really ld!!! */ | |
1061 | ||
1062 | /* Parse arguments. Remember output file spec, pass the rest to ld. */ | |
1063 | /* After the first file, put in the c++ rt0. */ | |
1064 | ||
1065 | first_file = 1; | |
1066 | while ((arg = *++argv) != (char *) 0) | |
1067 | { | |
1068 | *ld1++ = *ld2++ = arg; | |
1069 | ||
1070 | if (arg[0] == '-') | |
1071 | { | |
1072 | switch (arg[1]) | |
1073 | { | |
1074 | #ifdef COLLECT_EXPORT_LIST | |
1075 | /* We want to disable automatic exports on AIX when user | |
1076 | explicitly puts an export list in command line */ | |
1077 | case 'b': | |
1078 | if (arg[2] == 'E' || strncmp (&arg[2], "export", 6) == 0) | |
1079 | export_flag = 1; | |
1080 | else if (arg[2] == '6' && arg[3] == '4') | |
1081 | aix64_flag = 1; | |
1082 | break; | |
1083 | #endif | |
1084 | ||
1085 | case 'd': | |
1086 | if (!strcmp (arg, "-debug")) | |
1087 | { | |
1088 | /* Already parsed. */ | |
1089 | ld1--; | |
1090 | ld2--; | |
1091 | } | |
1092 | break; | |
1093 | ||
1094 | case 'l': | |
1095 | if (first_file) | |
1096 | { | |
1097 | /* place o_file BEFORE this argument! */ | |
1098 | first_file = 0; | |
1099 | ld2--; | |
1100 | *ld2++ = o_file; | |
1101 | *ld2++ = arg; | |
1102 | } | |
1103 | #ifdef COLLECT_EXPORT_LIST | |
1104 | { | |
1105 | /* Resolving full library name. */ | |
1106 | const char *s = resolve_lib_name (arg+2); | |
1107 | ||
1108 | /* Saving a full library name. */ | |
1109 | add_to_list (&libs, s); | |
1110 | } | |
1111 | #endif | |
1112 | break; | |
1113 | ||
1114 | #ifdef COLLECT_EXPORT_LIST | |
1115 | /* Saving directories where to search for libraries. */ | |
1116 | case 'L': | |
1117 | add_prefix (&cmdline_lib_dirs, arg+2); | |
1118 | break; | |
1119 | #else | |
1120 | #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES | |
1121 | case 'L': | |
1122 | if (is_in_args (arg, (const char **) ld1_argv, ld1-1)) | |
1123 | --ld1; | |
1124 | break; | |
1125 | #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */ | |
1126 | #endif | |
1127 | ||
1128 | case 'o': | |
1129 | if (arg[2] == '\0') | |
1130 | output_file = *ld1++ = *ld2++ = *++argv; | |
1131 | else if (1 | |
1132 | #ifdef SWITCHES_NEED_SPACES | |
1133 | && ! strchr (SWITCHES_NEED_SPACES, arg[1]) | |
1134 | #endif | |
1135 | ) | |
1136 | ||
1137 | output_file = &arg[2]; | |
1138 | break; | |
1139 | ||
1140 | case 'r': | |
1141 | if (arg[2] == '\0') | |
1142 | rflag = 1; | |
1143 | break; | |
1144 | ||
1145 | case 's': | |
1146 | if (arg[2] == '\0' && do_collecting) | |
1147 | { | |
1148 | /* We must strip after the nm run, otherwise C++ linking | |
1149 | will not work. Thus we strip in the second ld run, or | |
1150 | else with strip if there is no second ld run. */ | |
1151 | strip_flag = 1; | |
1152 | ld1--; | |
1153 | } | |
1154 | break; | |
1155 | ||
1156 | case 'v': | |
1157 | if (arg[2] == '\0') | |
1158 | vflag = 1; | |
1159 | break; | |
1160 | } | |
1161 | } | |
1162 | else if ((p = strrchr (arg, '.')) != (char *) 0 | |
1163 | && (strcmp (p, ".o") == 0 || strcmp (p, ".a") == 0 | |
1164 | || strcmp (p, ".so") == 0 || strcmp (p, ".lo") == 0 | |
1165 | || strcmp (p, ".obj") == 0)) | |
1166 | { | |
1167 | if (first_file) | |
1168 | { | |
1169 | first_file = 0; | |
1170 | if (p[1] == 'o') | |
1171 | *ld2++ = o_file; | |
1172 | else | |
1173 | { | |
1174 | /* place o_file BEFORE this argument! */ | |
1175 | ld2--; | |
1176 | *ld2++ = o_file; | |
1177 | *ld2++ = arg; | |
1178 | } | |
1179 | } | |
1180 | if (p[1] == 'o' || p[1] == 'l') | |
1181 | *object++ = arg; | |
1182 | #ifdef COLLECT_EXPORT_LIST | |
1183 | /* libraries can be specified directly, i.e. without -l flag. */ | |
1184 | else | |
1185 | { | |
1186 | /* Saving a full library name. */ | |
1187 | add_to_list (&libs, arg); | |
1188 | } | |
1189 | #endif | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | #ifdef COLLECT_EXPORT_LIST | |
1194 | /* This is added only for debugging purposes. */ | |
1195 | if (debug) | |
1196 | { | |
1197 | fprintf (stderr, "List of libraries:\n"); | |
1198 | dump_list (stderr, "\t", libs.first); | |
1199 | } | |
1200 | ||
1201 | /* The AIX linker will discard static constructors in object files if | |
1202 | nothing else in the file is referenced, so look at them first. */ | |
1203 | { | |
1204 | const char **export_object_lst = (const char **)object_lst; | |
1205 | ||
1206 | while (export_object_lst < object) | |
1207 | scan_prog_file (*export_object_lst++, PASS_OBJ); | |
1208 | } | |
1209 | { | |
1210 | struct id *list = libs.first; | |
1211 | ||
1212 | for (; list; list = list->next) | |
1213 | scan_prog_file (list->name, PASS_FIRST); | |
1214 | } | |
1215 | ||
1216 | if (exports.first) | |
1217 | { | |
1218 | char *buf = concat ("-bE:", export_file, NULL); | |
1219 | ||
1220 | *ld1++ = buf; | |
1221 | *ld2++ = buf; | |
1222 | ||
1223 | exportf = fopen (export_file, "w"); | |
1224 | if (exportf == (FILE *) 0) | |
1225 | fatal_perror ("fopen %s", export_file); | |
1226 | write_aix_file (exportf, exports.first); | |
1227 | if (fclose (exportf)) | |
1228 | fatal_perror ("fclose %s", export_file); | |
1229 | } | |
1230 | #endif | |
1231 | ||
1232 | *c_ptr++ = c_file; | |
1233 | *c_ptr = *ld1 = *object = (char *) 0; | |
1234 | ||
1235 | if (vflag) | |
1236 | { | |
1237 | notice ("collect2 version %s", version_string); | |
1238 | #ifdef TARGET_VERSION | |
1239 | TARGET_VERSION; | |
1240 | #endif | |
1241 | fprintf (stderr, "\n"); | |
1242 | } | |
1243 | ||
1244 | if (debug) | |
1245 | { | |
1246 | const char *ptr; | |
1247 | fprintf (stderr, "ld_file_name = %s\n", | |
1248 | (ld_file_name ? ld_file_name : "not found")); | |
1249 | fprintf (stderr, "c_file_name = %s\n", | |
1250 | (c_file_name ? c_file_name : "not found")); | |
1251 | fprintf (stderr, "nm_file_name = %s\n", | |
1252 | (nm_file_name ? nm_file_name : "not found")); | |
1253 | #ifdef LDD_SUFFIX | |
1254 | fprintf (stderr, "ldd_file_name = %s\n", | |
1255 | (ldd_file_name ? ldd_file_name : "not found")); | |
1256 | #endif | |
1257 | fprintf (stderr, "strip_file_name = %s\n", | |
1258 | (strip_file_name ? strip_file_name : "not found")); | |
1259 | fprintf (stderr, "c_file = %s\n", | |
1260 | (c_file ? c_file : "not found")); | |
1261 | fprintf (stderr, "o_file = %s\n", | |
1262 | (o_file ? o_file : "not found")); | |
1263 | ||
1264 | ptr = getenv ("COLLECT_GCC_OPTIONS"); | |
1265 | if (ptr) | |
1266 | fprintf (stderr, "COLLECT_GCC_OPTIONS = %s\n", ptr); | |
1267 | ||
1268 | ptr = getenv ("COLLECT_GCC"); | |
1269 | if (ptr) | |
1270 | fprintf (stderr, "COLLECT_GCC = %s\n", ptr); | |
1271 | ||
1272 | ptr = getenv ("COMPILER_PATH"); | |
1273 | if (ptr) | |
1274 | fprintf (stderr, "COMPILER_PATH = %s\n", ptr); | |
1275 | ||
1276 | ptr = getenv (LIBRARY_PATH_ENV); | |
1277 | if (ptr) | |
1278 | fprintf (stderr, "%-20s= %s\n", LIBRARY_PATH_ENV, ptr); | |
1279 | ||
1280 | fprintf (stderr, "\n"); | |
1281 | } | |
1282 | ||
1283 | /* Load the program, searching all libraries and attempting to provide | |
1284 | undefined symbols from repository information. */ | |
1285 | ||
1286 | /* On AIX we do this later. */ | |
1287 | #ifndef COLLECT_EXPORT_LIST | |
1288 | do_tlink (ld1_argv, object_lst); | |
1289 | #endif | |
1290 | ||
1291 | /* If -r or they will be run via some other method, do not build the | |
1292 | constructor or destructor list, just return now. */ | |
1293 | if (rflag | |
1294 | #ifndef COLLECT_EXPORT_LIST | |
1295 | || ! do_collecting | |
1296 | #endif | |
1297 | ) | |
1298 | { | |
1299 | #ifdef COLLECT_EXPORT_LIST | |
1300 | /* Do the link we avoided above if we are exiting. */ | |
1301 | do_tlink (ld1_argv, object_lst); | |
1302 | ||
1303 | /* But make sure we delete the export file we may have created. */ | |
1304 | if (export_file != 0 && export_file[0]) | |
1305 | maybe_unlink (export_file); | |
1306 | #endif | |
1307 | maybe_unlink (c_file); | |
1308 | maybe_unlink (o_file); | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | /* Examine the namelist with nm and search it for static constructors | |
1313 | and destructors to call. | |
1314 | Write the constructor and destructor tables to a .s file and reload. */ | |
1315 | ||
1316 | /* On AIX we already scanned for global constructors/destructors. */ | |
1317 | #ifndef COLLECT_EXPORT_LIST | |
1318 | scan_prog_file (output_file, PASS_FIRST); | |
1319 | #endif | |
1320 | ||
1321 | #ifdef SCAN_LIBRARIES | |
1322 | scan_libraries (output_file); | |
1323 | #endif | |
1324 | ||
1325 | if (debug) | |
1326 | { | |
1327 | notice ("%d constructor(s) found\n", constructors.number); | |
1328 | notice ("%d destructor(s) found\n", destructors.number); | |
1329 | notice ("%d frame table(s) found\n", frame_tables.number); | |
1330 | } | |
1331 | ||
1332 | if (constructors.number == 0 && destructors.number == 0 | |
1333 | && frame_tables.number == 0 | |
1334 | #if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST) | |
1335 | /* If we will be running these functions ourselves, we want to emit | |
1336 | stubs into the shared library so that we do not have to relink | |
1337 | dependent programs when we add static objects. */ | |
1338 | && ! shared_obj | |
1339 | #endif | |
1340 | ) | |
1341 | { | |
1342 | #ifdef COLLECT_EXPORT_LIST | |
1343 | /* Do tlink without additional code generation. */ | |
1344 | do_tlink (ld1_argv, object_lst); | |
1345 | #endif | |
1346 | /* Strip now if it was requested on the command line. */ | |
1347 | if (strip_flag) | |
1348 | { | |
1349 | char **real_strip_argv = xcalloc (sizeof (char *), 3); | |
1350 | const char ** strip_argv = (const char **) real_strip_argv; | |
1351 | ||
1352 | strip_argv[0] = strip_file_name; | |
1353 | strip_argv[1] = output_file; | |
1354 | strip_argv[2] = (char *) 0; | |
1355 | fork_execute ("strip", real_strip_argv); | |
1356 | } | |
1357 | ||
1358 | #ifdef COLLECT_EXPORT_LIST | |
1359 | maybe_unlink (export_file); | |
1360 | #endif | |
1361 | maybe_unlink (c_file); | |
1362 | maybe_unlink (o_file); | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | /* Sort ctor and dtor lists by priority. */ | |
1367 | sort_ids (&constructors); | |
1368 | sort_ids (&destructors); | |
1369 | ||
1370 | maybe_unlink(output_file); | |
1371 | outf = fopen (c_file, "w"); | |
1372 | if (outf == (FILE *) 0) | |
1373 | fatal_perror ("fopen %s", c_file); | |
1374 | ||
1375 | write_c_file (outf, c_file); | |
1376 | ||
1377 | if (fclose (outf)) | |
1378 | fatal_perror ("fclose %s", c_file); | |
1379 | ||
1380 | /* Tell the linker that we have initializer and finalizer functions. */ | |
1381 | #ifdef LD_INIT_SWITCH | |
1382 | #ifdef COLLECT_EXPORT_LIST | |
1383 | *ld2++ = concat (LD_INIT_SWITCH, ":", initname, ":", fininame, NULL); | |
1384 | #else | |
1385 | *ld2++ = LD_INIT_SWITCH; | |
1386 | *ld2++ = initname; | |
1387 | *ld2++ = LD_FINI_SWITCH; | |
1388 | *ld2++ = fininame; | |
1389 | #endif | |
1390 | #endif | |
1391 | ||
1392 | #ifdef COLLECT_EXPORT_LIST | |
1393 | if (shared_obj) | |
1394 | { | |
1395 | /* If we did not add export flag to link arguments before, add it to | |
1396 | second link phase now. No new exports should have been added. */ | |
1397 | if (! exports.first) | |
1398 | *ld2++ = concat ("-bE:", export_file, NULL); | |
1399 | ||
1400 | #ifndef LD_INIT_SWITCH | |
1401 | add_to_list (&exports, initname); | |
1402 | add_to_list (&exports, fininame); | |
1403 | add_to_list (&exports, "_GLOBAL__DI"); | |
1404 | add_to_list (&exports, "_GLOBAL__DD"); | |
1405 | #endif | |
1406 | exportf = fopen (export_file, "w"); | |
1407 | if (exportf == (FILE *) 0) | |
1408 | fatal_perror ("fopen %s", export_file); | |
1409 | write_aix_file (exportf, exports.first); | |
1410 | if (fclose (exportf)) | |
1411 | fatal_perror ("fclose %s", export_file); | |
1412 | } | |
1413 | #endif | |
1414 | ||
1415 | /* End of arguments to second link phase. */ | |
1416 | *ld2 = (char*) 0; | |
1417 | ||
1418 | if (debug) | |
1419 | { | |
1420 | fprintf (stderr, "\n========== output_file = %s, c_file = %s\n", | |
1421 | output_file, c_file); | |
1422 | write_c_file (stderr, "stderr"); | |
1423 | fprintf (stderr, "========== end of c_file\n\n"); | |
1424 | #ifdef COLLECT_EXPORT_LIST | |
1425 | fprintf (stderr, "\n========== export_file = %s\n", export_file); | |
1426 | write_aix_file (stderr, exports.first); | |
1427 | fprintf (stderr, "========== end of export_file\n\n"); | |
1428 | #endif | |
1429 | } | |
1430 | ||
1431 | /* Assemble the constructor and destructor tables. | |
1432 | Link the tables in with the rest of the program. */ | |
1433 | ||
1434 | fork_execute ("gcc", c_argv); | |
1435 | #ifdef COLLECT_EXPORT_LIST | |
1436 | /* On AIX we must call tlink because of possible templates resolution. */ | |
1437 | do_tlink (ld2_argv, object_lst); | |
1438 | #else | |
1439 | /* Otherwise, simply call ld because tlink is already done. */ | |
1440 | fork_execute ("ld", ld2_argv); | |
1441 | ||
1442 | /* Let scan_prog_file do any final mods (OSF/rose needs this for | |
1443 | constructors/destructors in shared libraries. */ | |
1444 | scan_prog_file (output_file, PASS_SECOND); | |
1445 | #endif | |
1446 | ||
1447 | maybe_unlink (c_file); | |
1448 | maybe_unlink (o_file); | |
1449 | ||
1450 | #ifdef COLLECT_EXPORT_LIST | |
1451 | maybe_unlink (export_file); | |
1452 | #endif | |
1453 | ||
1454 | return 0; | |
1455 | } | |
1456 | ||
1457 | \f | |
1458 | /* Wait for a process to finish, and exit if a nonzero status is found. */ | |
1459 | ||
1460 | int | |
1461 | collect_wait (const char *prog) | |
1462 | { | |
1463 | int status; | |
1464 | ||
1465 | pwait (pid, &status, 0); | |
1466 | if (status) | |
1467 | { | |
1468 | if (WIFSIGNALED (status)) | |
1469 | { | |
1470 | int sig = WTERMSIG (status); | |
1471 | error ("%s terminated with signal %d [%s]%s", | |
1472 | prog, sig, strsignal(sig), | |
1473 | WCOREDUMP(status) ? ", core dumped" : ""); | |
1474 | collect_exit (FATAL_EXIT_CODE); | |
1475 | } | |
1476 | ||
1477 | if (WIFEXITED (status)) | |
1478 | return WEXITSTATUS (status); | |
1479 | } | |
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | static void | |
1484 | do_wait (const char *prog) | |
1485 | { | |
1486 | int ret = collect_wait (prog); | |
1487 | if (ret != 0) | |
1488 | { | |
1489 | error ("%s returned %d exit status", prog, ret); | |
1490 | collect_exit (ret); | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | \f | |
1495 | /* Execute a program, and wait for the reply. */ | |
1496 | ||
1497 | void | |
1498 | collect_execute (const char *prog, char **argv, const char *redir) | |
1499 | { | |
1500 | char *errmsg_fmt; | |
1501 | char *errmsg_arg; | |
1502 | int redir_handle = -1; | |
1503 | int stdout_save = -1; | |
1504 | int stderr_save = -1; | |
1505 | ||
1506 | if (vflag || debug) | |
1507 | { | |
1508 | char **p_argv; | |
1509 | const char *str; | |
1510 | ||
1511 | if (argv[0]) | |
1512 | fprintf (stderr, "%s", argv[0]); | |
1513 | else | |
1514 | notice ("[cannot find %s]", prog); | |
1515 | ||
1516 | for (p_argv = &argv[1]; (str = *p_argv) != (char *) 0; p_argv++) | |
1517 | fprintf (stderr, " %s", str); | |
1518 | ||
1519 | fprintf (stderr, "\n"); | |
1520 | } | |
1521 | ||
1522 | fflush (stdout); | |
1523 | fflush (stderr); | |
1524 | ||
1525 | /* If we cannot find a program we need, complain error. Do this here | |
1526 | since we might not end up needing something that we could not find. */ | |
1527 | ||
1528 | if (argv[0] == 0) | |
1529 | fatal ("cannot find `%s'", prog); | |
1530 | ||
1531 | if (redir) | |
1532 | { | |
1533 | /* Open response file. */ | |
1534 | redir_handle = open (redir, O_WRONLY | O_TRUNC | O_CREAT); | |
1535 | ||
1536 | /* Duplicate the stdout and stderr file handles | |
1537 | so they can be restored later. */ | |
1538 | stdout_save = dup (STDOUT_FILENO); | |
1539 | if (stdout_save == -1) | |
1540 | fatal_perror ("redirecting stdout: %s", redir); | |
1541 | stderr_save = dup (STDERR_FILENO); | |
1542 | if (stderr_save == -1) | |
1543 | fatal_perror ("redirecting stdout: %s", redir); | |
1544 | ||
1545 | /* Redirect stdout & stderr to our response file. */ | |
1546 | dup2 (redir_handle, STDOUT_FILENO); | |
1547 | dup2 (redir_handle, STDERR_FILENO); | |
1548 | } | |
1549 | ||
1550 | pid = pexecute (argv[0], argv, argv[0], NULL, &errmsg_fmt, &errmsg_arg, | |
1551 | (PEXECUTE_FIRST | PEXECUTE_LAST | PEXECUTE_SEARCH)); | |
1552 | ||
1553 | if (redir) | |
1554 | { | |
1555 | /* Restore stdout and stderr to their previous settings. */ | |
1556 | dup2 (stdout_save, STDOUT_FILENO); | |
1557 | dup2 (stderr_save, STDERR_FILENO); | |
1558 | ||
1559 | /* Close response file. */ | |
1560 | close (redir_handle); | |
1561 | } | |
1562 | ||
1563 | if (pid == -1) | |
1564 | fatal_perror (errmsg_fmt, errmsg_arg); | |
1565 | } | |
1566 | ||
1567 | static void | |
1568 | fork_execute (const char *prog, char **argv) | |
1569 | { | |
1570 | collect_execute (prog, argv, NULL); | |
1571 | do_wait (prog); | |
1572 | } | |
1573 | \f | |
1574 | /* Unlink a file unless we are debugging. */ | |
1575 | ||
1576 | static void | |
1577 | maybe_unlink (const char *file) | |
1578 | { | |
1579 | if (!debug) | |
1580 | unlink (file); | |
1581 | else | |
1582 | notice ("[Leaving %s]\n", file); | |
1583 | } | |
1584 | ||
1585 | \f | |
1586 | static long sequence_number = 0; | |
1587 | ||
1588 | /* Add a name to a linked list. */ | |
1589 | ||
1590 | static void | |
1591 | add_to_list (struct head *head_ptr, const char *name) | |
1592 | { | |
1593 | struct id *newid = xcalloc (sizeof (struct id) + strlen (name), 1); | |
1594 | struct id *p; | |
1595 | strcpy (newid->name, name); | |
1596 | ||
1597 | if (head_ptr->first) | |
1598 | head_ptr->last->next = newid; | |
1599 | else | |
1600 | head_ptr->first = newid; | |
1601 | ||
1602 | /* Check for duplicate symbols. */ | |
1603 | for (p = head_ptr->first; | |
1604 | strcmp (name, p->name) != 0; | |
1605 | p = p->next) | |
1606 | ; | |
1607 | if (p != newid) | |
1608 | { | |
1609 | head_ptr->last->next = 0; | |
1610 | free (newid); | |
1611 | return; | |
1612 | } | |
1613 | ||
1614 | newid->sequence = ++sequence_number; | |
1615 | head_ptr->last = newid; | |
1616 | head_ptr->number++; | |
1617 | } | |
1618 | ||
1619 | /* Grab the init priority number from an init function name that | |
1620 | looks like "_GLOBAL_.I.12345.foo". */ | |
1621 | ||
1622 | static int | |
1623 | extract_init_priority (const char *name) | |
1624 | { | |
1625 | int pos = 0, pri; | |
1626 | ||
1627 | while (name[pos] == '_') | |
1628 | ++pos; | |
1629 | pos += 10; /* strlen ("GLOBAL__X_") */ | |
1630 | ||
1631 | /* Extract init_p number from ctor/dtor name. */ | |
1632 | pri = atoi (name + pos); | |
1633 | return pri ? pri : DEFAULT_INIT_PRIORITY; | |
1634 | } | |
1635 | ||
1636 | /* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order. | |
1637 | ctors will be run from right to left, dtors from left to right. */ | |
1638 | ||
1639 | static void | |
1640 | sort_ids (struct head *head_ptr) | |
1641 | { | |
1642 | /* id holds the current element to insert. id_next holds the next | |
1643 | element to insert. id_ptr iterates through the already sorted elements | |
1644 | looking for the place to insert id. */ | |
1645 | struct id *id, *id_next, **id_ptr; | |
1646 | ||
1647 | id = head_ptr->first; | |
1648 | ||
1649 | /* We don't have any sorted elements yet. */ | |
1650 | head_ptr->first = NULL; | |
1651 | ||
1652 | for (; id; id = id_next) | |
1653 | { | |
1654 | id_next = id->next; | |
1655 | id->sequence = extract_init_priority (id->name); | |
1656 | ||
1657 | for (id_ptr = &(head_ptr->first); ; id_ptr = &((*id_ptr)->next)) | |
1658 | if (*id_ptr == NULL | |
1659 | /* If the sequence numbers are the same, we put the id from the | |
1660 | file later on the command line later in the list. */ | |
1661 | || id->sequence > (*id_ptr)->sequence | |
1662 | /* Hack: do lexical compare, too. | |
1663 | || (id->sequence == (*id_ptr)->sequence | |
1664 | && strcmp (id->name, (*id_ptr)->name) > 0) */ | |
1665 | ) | |
1666 | { | |
1667 | id->next = *id_ptr; | |
1668 | *id_ptr = id; | |
1669 | break; | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | /* Now set the sequence numbers properly so write_c_file works. */ | |
1674 | for (id = head_ptr->first; id; id = id->next) | |
1675 | id->sequence = ++sequence_number; | |
1676 | } | |
1677 | ||
1678 | /* Write: `prefix', the names on list LIST, `suffix'. */ | |
1679 | ||
1680 | static void | |
1681 | write_list (FILE *stream, const char *prefix, struct id *list) | |
1682 | { | |
1683 | while (list) | |
1684 | { | |
1685 | fprintf (stream, "%sx%d,\n", prefix, list->sequence); | |
1686 | list = list->next; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES | |
1691 | /* Given a STRING, return nonzero if it occurs in the list in range | |
1692 | [ARGS_BEGIN,ARGS_END). */ | |
1693 | ||
1694 | static int | |
1695 | is_in_args (const char *string, const char **args_begin, | |
1696 | const char **args_end) | |
1697 | { | |
1698 | const char **args_pointer; | |
1699 | for (args_pointer = args_begin; args_pointer != args_end; ++args_pointer) | |
1700 | if (strcmp (string, *args_pointer) == 0) | |
1701 | return 1; | |
1702 | return 0; | |
1703 | } | |
1704 | #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */ | |
1705 | ||
1706 | #ifdef COLLECT_EXPORT_LIST | |
1707 | /* This function is really used only on AIX, but may be useful. */ | |
1708 | #if 0 | |
1709 | static int | |
1710 | is_in_list (const char *prefix, struct id *list) | |
1711 | { | |
1712 | while (list) | |
1713 | { | |
1714 | if (!strcmp (prefix, list->name)) return 1; | |
1715 | list = list->next; | |
1716 | } | |
1717 | return 0; | |
1718 | } | |
1719 | #endif | |
1720 | #endif /* COLLECT_EXPORT_LIST */ | |
1721 | ||
1722 | /* Added for debugging purpose. */ | |
1723 | #ifdef COLLECT_EXPORT_LIST | |
1724 | static void | |
1725 | dump_list (FILE *stream, const char *prefix, struct id *list) | |
1726 | { | |
1727 | while (list) | |
1728 | { | |
1729 | fprintf (stream, "%s%s,\n", prefix, list->name); | |
1730 | list = list->next; | |
1731 | } | |
1732 | } | |
1733 | #endif | |
1734 | ||
1735 | #if 0 | |
1736 | static void | |
1737 | dump_prefix_list (FILE *stream, const char *prefix, struct prefix_list *list) | |
1738 | { | |
1739 | while (list) | |
1740 | { | |
1741 | fprintf (stream, "%s%s,\n", prefix, list->prefix); | |
1742 | list = list->next; | |
1743 | } | |
1744 | } | |
1745 | #endif | |
1746 | ||
1747 | static void | |
1748 | write_list_with_asm (FILE *stream, const char *prefix, struct id *list) | |
1749 | { | |
1750 | while (list) | |
1751 | { | |
1752 | fprintf (stream, "%sx%d __asm__ (\"%s\");\n", | |
1753 | prefix, list->sequence, list->name); | |
1754 | list = list->next; | |
1755 | } | |
1756 | } | |
1757 | ||
1758 | /* Write out the constructor and destructor tables statically (for a shared | |
1759 | object), along with the functions to execute them. */ | |
1760 | ||
1761 | static void | |
1762 | write_c_file_stat (FILE *stream, const char *name ATTRIBUTE_UNUSED) | |
1763 | { | |
1764 | const char *p, *q; | |
1765 | char *prefix, *r; | |
1766 | int frames = (frame_tables.number > 0); | |
1767 | ||
1768 | /* Figure out name of output_file, stripping off .so version. */ | |
1769 | p = strrchr (output_file, '/'); | |
1770 | if (p == 0) | |
1771 | p = output_file; | |
1772 | else | |
1773 | p++; | |
1774 | q = p; | |
1775 | while (q) | |
1776 | { | |
1777 | q = strchr (q,'.'); | |
1778 | if (q == 0) | |
1779 | { | |
1780 | q = p + strlen (p); | |
1781 | break; | |
1782 | } | |
1783 | else | |
1784 | { | |
1785 | if (strncmp (q, ".so", 3) == 0) | |
1786 | { | |
1787 | q += 3; | |
1788 | break; | |
1789 | } | |
1790 | else | |
1791 | q++; | |
1792 | } | |
1793 | } | |
1794 | /* q points to null at end of the string (or . of the .so version) */ | |
1795 | prefix = xmalloc (q - p + 1); | |
1796 | strncpy (prefix, p, q - p); | |
1797 | prefix[q - p] = 0; | |
1798 | for (r = prefix; *r; r++) | |
1799 | if (!ISALNUM ((unsigned char)*r)) | |
1800 | *r = '_'; | |
1801 | if (debug) | |
1802 | notice ("\nwrite_c_file - output name is %s, prefix is %s\n", | |
1803 | output_file, prefix); | |
1804 | ||
1805 | initname = concat ("_GLOBAL__FI_", prefix, NULL); | |
1806 | fininame = concat ("_GLOBAL__FD_", prefix, NULL); | |
1807 | ||
1808 | free (prefix); | |
1809 | ||
1810 | /* Write the tables as C code. */ | |
1811 | ||
1812 | fprintf (stream, "static int count;\n"); | |
1813 | fprintf (stream, "typedef void entry_pt();\n"); | |
1814 | write_list_with_asm (stream, "extern entry_pt ", constructors.first); | |
1815 | ||
1816 | if (frames) | |
1817 | { | |
1818 | write_list_with_asm (stream, "extern void *", frame_tables.first); | |
1819 | ||
1820 | fprintf (stream, "\tstatic void *frame_table[] = {\n"); | |
1821 | write_list (stream, "\t\t&", frame_tables.first); | |
1822 | fprintf (stream, "\t0\n};\n"); | |
1823 | ||
1824 | /* This must match what's in frame.h. */ | |
1825 | fprintf (stream, "struct object {\n"); | |
1826 | fprintf (stream, " void *pc_begin;\n"); | |
1827 | fprintf (stream, " void *pc_end;\n"); | |
1828 | fprintf (stream, " void *fde_begin;\n"); | |
1829 | fprintf (stream, " void *fde_array;\n"); | |
1830 | fprintf (stream, " __SIZE_TYPE__ count;\n"); | |
1831 | fprintf (stream, " struct object *next;\n"); | |
1832 | fprintf (stream, "};\n"); | |
1833 | ||
1834 | fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n"); | |
1835 | fprintf (stream, "extern void *__deregister_frame_info (void *);\n"); | |
1836 | ||
1837 | fprintf (stream, "static void reg_frame () {\n"); | |
1838 | fprintf (stream, "\tstatic struct object ob;\n"); | |
1839 | fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n"); | |
1840 | fprintf (stream, "\t}\n"); | |
1841 | ||
1842 | fprintf (stream, "static void dereg_frame () {\n"); | |
1843 | fprintf (stream, "\t__deregister_frame_info (frame_table);\n"); | |
1844 | fprintf (stream, "\t}\n"); | |
1845 | } | |
1846 | ||
1847 | fprintf (stream, "void %s() {\n", initname); | |
1848 | if (constructors.number > 0 || frames) | |
1849 | { | |
1850 | fprintf (stream, "\tstatic entry_pt *ctors[] = {\n"); | |
1851 | write_list (stream, "\t\t", constructors.first); | |
1852 | if (frames) | |
1853 | fprintf (stream, "\treg_frame,\n"); | |
1854 | fprintf (stream, "\t};\n"); | |
1855 | fprintf (stream, "\tentry_pt **p;\n"); | |
1856 | fprintf (stream, "\tif (count++ != 0) return;\n"); | |
1857 | fprintf (stream, "\tp = ctors + %d;\n", constructors.number + frames); | |
1858 | fprintf (stream, "\twhile (p > ctors) (*--p)();\n"); | |
1859 | } | |
1860 | else | |
1861 | fprintf (stream, "\t++count;\n"); | |
1862 | fprintf (stream, "}\n"); | |
1863 | write_list_with_asm (stream, "extern entry_pt ", destructors.first); | |
1864 | fprintf (stream, "void %s() {\n", fininame); | |
1865 | if (destructors.number > 0 || frames) | |
1866 | { | |
1867 | fprintf (stream, "\tstatic entry_pt *dtors[] = {\n"); | |
1868 | write_list (stream, "\t\t", destructors.first); | |
1869 | if (frames) | |
1870 | fprintf (stream, "\tdereg_frame,\n"); | |
1871 | fprintf (stream, "\t};\n"); | |
1872 | fprintf (stream, "\tentry_pt **p;\n"); | |
1873 | fprintf (stream, "\tif (--count != 0) return;\n"); | |
1874 | fprintf (stream, "\tp = dtors;\n"); | |
1875 | fprintf (stream, "\twhile (p < dtors + %d) (*p++)();\n", | |
1876 | destructors.number + frames); | |
1877 | } | |
1878 | fprintf (stream, "}\n"); | |
1879 | ||
1880 | if (shared_obj) | |
1881 | { | |
1882 | COLLECT_SHARED_INIT_FUNC(stream, initname); | |
1883 | COLLECT_SHARED_FINI_FUNC(stream, fininame); | |
1884 | } | |
1885 | } | |
1886 | ||
1887 | /* Write the constructor/destructor tables. */ | |
1888 | ||
1889 | #ifndef LD_INIT_SWITCH | |
1890 | static void | |
1891 | write_c_file_glob (FILE *stream, const char *name ATTRIBUTE_UNUSED) | |
1892 | { | |
1893 | /* Write the tables as C code. */ | |
1894 | ||
1895 | int frames = (frame_tables.number > 0); | |
1896 | ||
1897 | fprintf (stream, "typedef void entry_pt();\n\n"); | |
1898 | ||
1899 | write_list_with_asm (stream, "extern entry_pt ", constructors.first); | |
1900 | ||
1901 | if (frames) | |
1902 | { | |
1903 | write_list_with_asm (stream, "extern void *", frame_tables.first); | |
1904 | ||
1905 | fprintf (stream, "\tstatic void *frame_table[] = {\n"); | |
1906 | write_list (stream, "\t\t&", frame_tables.first); | |
1907 | fprintf (stream, "\t0\n};\n"); | |
1908 | ||
1909 | /* This must match what's in frame.h. */ | |
1910 | fprintf (stream, "struct object {\n"); | |
1911 | fprintf (stream, " void *pc_begin;\n"); | |
1912 | fprintf (stream, " void *pc_end;\n"); | |
1913 | fprintf (stream, " void *fde_begin;\n"); | |
1914 | fprintf (stream, " void *fde_array;\n"); | |
1915 | fprintf (stream, " __SIZE_TYPE__ count;\n"); | |
1916 | fprintf (stream, " struct object *next;\n"); | |
1917 | fprintf (stream, "};\n"); | |
1918 | ||
1919 | fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n"); | |
1920 | fprintf (stream, "extern void *__deregister_frame_info (void *);\n"); | |
1921 | ||
1922 | fprintf (stream, "static void reg_frame () {\n"); | |
1923 | fprintf (stream, "\tstatic struct object ob;\n"); | |
1924 | fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n"); | |
1925 | fprintf (stream, "\t}\n"); | |
1926 | ||
1927 | fprintf (stream, "static void dereg_frame () {\n"); | |
1928 | fprintf (stream, "\t__deregister_frame_info (frame_table);\n"); | |
1929 | fprintf (stream, "\t}\n"); | |
1930 | } | |
1931 | ||
1932 | fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n"); | |
1933 | fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number + frames); | |
1934 | write_list (stream, "\t", constructors.first); | |
1935 | if (frames) | |
1936 | fprintf (stream, "\treg_frame,\n"); | |
1937 | fprintf (stream, "\t0\n};\n\n"); | |
1938 | ||
1939 | write_list_with_asm (stream, "extern entry_pt ", destructors.first); | |
1940 | ||
1941 | fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n"); | |
1942 | fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number + frames); | |
1943 | write_list (stream, "\t", destructors.first); | |
1944 | if (frames) | |
1945 | fprintf (stream, "\tdereg_frame,\n"); | |
1946 | fprintf (stream, "\t0\n};\n\n"); | |
1947 | ||
1948 | fprintf (stream, "extern entry_pt %s;\n", NAME__MAIN); | |
1949 | fprintf (stream, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN); | |
1950 | } | |
1951 | #endif /* ! LD_INIT_SWITCH */ | |
1952 | ||
1953 | static void | |
1954 | write_c_file (FILE *stream, const char *name) | |
1955 | { | |
1956 | fprintf (stream, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n"); | |
1957 | #ifndef LD_INIT_SWITCH | |
1958 | if (! shared_obj) | |
1959 | write_c_file_glob (stream, name); | |
1960 | else | |
1961 | #endif | |
1962 | write_c_file_stat (stream, name); | |
1963 | fprintf (stream, "#ifdef __cplusplus\n}\n#endif\n"); | |
1964 | } | |
1965 | ||
1966 | #ifdef COLLECT_EXPORT_LIST | |
1967 | static void | |
1968 | write_aix_file (FILE *stream, struct id *list) | |
1969 | { | |
1970 | for (; list; list = list->next) | |
1971 | { | |
1972 | fputs (list->name, stream); | |
1973 | putc ('\n', stream); | |
1974 | } | |
1975 | } | |
1976 | #endif | |
1977 | \f | |
1978 | #ifdef OBJECT_FORMAT_NONE | |
1979 | ||
1980 | /* Generic version to scan the name list of the loaded program for | |
1981 | the symbols g++ uses for static constructors and destructors. | |
1982 | ||
1983 | The constructor table begins at __CTOR_LIST__ and contains a count | |
1984 | of the number of pointers (or -1 if the constructors are built in a | |
1985 | separate section by the linker), followed by the pointers to the | |
1986 | constructor functions, terminated with a null pointer. The | |
1987 | destructor table has the same format, and begins at __DTOR_LIST__. */ | |
1988 | ||
1989 | static void | |
1990 | scan_prog_file (const char *prog_name, enum pass which_pass) | |
1991 | { | |
1992 | void (*int_handler) (int); | |
1993 | void (*quit_handler) (int); | |
1994 | char *real_nm_argv[4]; | |
1995 | const char **nm_argv = (const char **) real_nm_argv; | |
1996 | int argc = 0; | |
1997 | int pipe_fd[2]; | |
1998 | char *p, buf[1024]; | |
1999 | FILE *inf; | |
2000 | ||
2001 | if (which_pass == PASS_SECOND) | |
2002 | return; | |
2003 | ||
2004 | /* If we do not have an `nm', complain. */ | |
2005 | if (nm_file_name == 0) | |
2006 | fatal ("cannot find `nm'"); | |
2007 | ||
2008 | nm_argv[argc++] = nm_file_name; | |
2009 | if (NM_FLAGS[0] != '\0') | |
2010 | nm_argv[argc++] = NM_FLAGS; | |
2011 | ||
2012 | nm_argv[argc++] = prog_name; | |
2013 | nm_argv[argc++] = (char *) 0; | |
2014 | ||
2015 | if (pipe (pipe_fd) < 0) | |
2016 | fatal_perror ("pipe"); | |
2017 | ||
2018 | inf = fdopen (pipe_fd[0], "r"); | |
2019 | if (inf == (FILE *) 0) | |
2020 | fatal_perror ("fdopen"); | |
2021 | ||
2022 | /* Trace if needed. */ | |
2023 | if (vflag) | |
2024 | { | |
2025 | const char **p_argv; | |
2026 | const char *str; | |
2027 | ||
2028 | for (p_argv = &nm_argv[0]; (str = *p_argv) != (char *) 0; p_argv++) | |
2029 | fprintf (stderr, " %s", str); | |
2030 | ||
2031 | fprintf (stderr, "\n"); | |
2032 | } | |
2033 | ||
2034 | fflush (stdout); | |
2035 | fflush (stderr); | |
2036 | ||
2037 | /* Spawn child nm on pipe. */ | |
2038 | pid = vfork (); | |
2039 | if (pid == -1) | |
2040 | fatal_perror (VFORK_STRING); | |
2041 | ||
2042 | if (pid == 0) /* child context */ | |
2043 | { | |
2044 | /* setup stdout */ | |
2045 | if (dup2 (pipe_fd[1], 1) < 0) | |
2046 | fatal_perror ("dup2 %d 1", pipe_fd[1]); | |
2047 | ||
2048 | if (close (pipe_fd[0]) < 0) | |
2049 | fatal_perror ("close %d", pipe_fd[0]); | |
2050 | ||
2051 | if (close (pipe_fd[1]) < 0) | |
2052 | fatal_perror ("close %d", pipe_fd[1]); | |
2053 | ||
2054 | execv (nm_file_name, real_nm_argv); | |
2055 | fatal_perror ("execv %s", nm_file_name); | |
2056 | } | |
2057 | ||
2058 | /* Parent context from here on. */ | |
2059 | int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN); | |
2060 | #ifdef SIGQUIT | |
2061 | quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN); | |
2062 | #endif | |
2063 | ||
2064 | if (close (pipe_fd[1]) < 0) | |
2065 | fatal_perror ("close %d", pipe_fd[1]); | |
2066 | ||
2067 | if (debug) | |
2068 | fprintf (stderr, "\nnm output with constructors/destructors.\n"); | |
2069 | ||
2070 | /* Read each line of nm output. */ | |
2071 | while (fgets (buf, sizeof buf, inf) != (char *) 0) | |
2072 | { | |
2073 | int ch, ch2; | |
2074 | char *name, *end; | |
2075 | ||
2076 | /* If it contains a constructor or destructor name, add the name | |
2077 | to the appropriate list. */ | |
2078 | ||
2079 | for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++) | |
2080 | if (ch == ' ' && p[1] == 'U' && p[2] == ' ') | |
2081 | break; | |
2082 | ||
2083 | if (ch != '_') | |
2084 | continue; | |
2085 | ||
2086 | name = p; | |
2087 | /* Find the end of the symbol name. | |
2088 | Do not include `|', because Encore nm can tack that on the end. */ | |
2089 | for (end = p; (ch2 = *end) != '\0' && !ISSPACE (ch2) && ch2 != '|'; | |
2090 | end++) | |
2091 | continue; | |
2092 | ||
2093 | ||
2094 | *end = '\0'; | |
2095 | switch (is_ctor_dtor (name)) | |
2096 | { | |
2097 | case 1: | |
2098 | if (which_pass != PASS_LIB) | |
2099 | add_to_list (&constructors, name); | |
2100 | break; | |
2101 | ||
2102 | case 2: | |
2103 | if (which_pass != PASS_LIB) | |
2104 | add_to_list (&destructors, name); | |
2105 | break; | |
2106 | ||
2107 | case 3: | |
2108 | if (which_pass != PASS_LIB) | |
2109 | fatal ("init function found in object %s", prog_name); | |
2110 | #ifndef LD_INIT_SWITCH | |
2111 | add_to_list (&constructors, name); | |
2112 | #endif | |
2113 | break; | |
2114 | ||
2115 | case 4: | |
2116 | if (which_pass != PASS_LIB) | |
2117 | fatal ("fini function found in object %s", prog_name); | |
2118 | #ifndef LD_FINI_SWITCH | |
2119 | add_to_list (&destructors, name); | |
2120 | #endif | |
2121 | break; | |
2122 | ||
2123 | case 5: | |
2124 | if (which_pass != PASS_LIB) | |
2125 | add_to_list (&frame_tables, name); | |
2126 | break; | |
2127 | ||
2128 | default: /* not a constructor or destructor */ | |
2129 | continue; | |
2130 | } | |
2131 | ||
2132 | if (debug) | |
2133 | fprintf (stderr, "\t%s\n", buf); | |
2134 | } | |
2135 | ||
2136 | if (debug) | |
2137 | fprintf (stderr, "\n"); | |
2138 | ||
2139 | if (fclose (inf) != 0) | |
2140 | fatal_perror ("fclose"); | |
2141 | ||
2142 | do_wait (nm_file_name); | |
2143 | ||
2144 | signal (SIGINT, int_handler); | |
2145 | #ifdef SIGQUIT | |
2146 | signal (SIGQUIT, quit_handler); | |
2147 | #endif | |
2148 | } | |
2149 | ||
2150 | #ifdef LDD_SUFFIX | |
2151 | ||
2152 | /* Use the List Dynamic Dependencies program to find shared libraries that | |
2153 | the output file depends upon and their initialization/finalization | |
2154 | routines, if any. */ | |
2155 | ||
2156 | static void | |
2157 | scan_libraries (const char *prog_name) | |
2158 | { | |
2159 | static struct head libraries; /* list of shared libraries found */ | |
2160 | struct id *list; | |
2161 | void (*int_handler) (int); | |
2162 | void (*quit_handler) (int); | |
2163 | char *real_ldd_argv[4]; | |
2164 | const char **ldd_argv = (const char **) real_ldd_argv; | |
2165 | int argc = 0; | |
2166 | int pipe_fd[2]; | |
2167 | char buf[1024]; | |
2168 | FILE *inf; | |
2169 | ||
2170 | /* If we do not have an `ldd', complain. */ | |
2171 | if (ldd_file_name == 0) | |
2172 | { | |
2173 | error ("cannot find `ldd'"); | |
2174 | return; | |
2175 | } | |
2176 | ||
2177 | ldd_argv[argc++] = ldd_file_name; | |
2178 | ldd_argv[argc++] = prog_name; | |
2179 | ldd_argv[argc++] = (char *) 0; | |
2180 | ||
2181 | if (pipe (pipe_fd) < 0) | |
2182 | fatal_perror ("pipe"); | |
2183 | ||
2184 | inf = fdopen (pipe_fd[0], "r"); | |
2185 | if (inf == (FILE *) 0) | |
2186 | fatal_perror ("fdopen"); | |
2187 | ||
2188 | /* Trace if needed. */ | |
2189 | if (vflag) | |
2190 | { | |
2191 | const char **p_argv; | |
2192 | const char *str; | |
2193 | ||
2194 | for (p_argv = &ldd_argv[0]; (str = *p_argv) != (char *) 0; p_argv++) | |
2195 | fprintf (stderr, " %s", str); | |
2196 | ||
2197 | fprintf (stderr, "\n"); | |
2198 | } | |
2199 | ||
2200 | fflush (stdout); | |
2201 | fflush (stderr); | |
2202 | ||
2203 | /* Spawn child ldd on pipe. */ | |
2204 | pid = vfork (); | |
2205 | if (pid == -1) | |
2206 | fatal_perror (VFORK_STRING); | |
2207 | ||
2208 | if (pid == 0) /* child context */ | |
2209 | { | |
2210 | /* setup stdout */ | |
2211 | if (dup2 (pipe_fd[1], 1) < 0) | |
2212 | fatal_perror ("dup2 %d 1", pipe_fd[1]); | |
2213 | ||
2214 | if (close (pipe_fd[0]) < 0) | |
2215 | fatal_perror ("close %d", pipe_fd[0]); | |
2216 | ||
2217 | if (close (pipe_fd[1]) < 0) | |
2218 | fatal_perror ("close %d", pipe_fd[1]); | |
2219 | ||
2220 | execv (ldd_file_name, real_ldd_argv); | |
2221 | fatal_perror ("execv %s", ldd_file_name); | |
2222 | } | |
2223 | ||
2224 | /* Parent context from here on. */ | |
2225 | int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN); | |
2226 | #ifdef SIGQUIT | |
2227 | quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN); | |
2228 | #endif | |
2229 | ||
2230 | if (close (pipe_fd[1]) < 0) | |
2231 | fatal_perror ("close %d", pipe_fd[1]); | |
2232 | ||
2233 | if (debug) | |
2234 | notice ("\nldd output with constructors/destructors.\n"); | |
2235 | ||
2236 | /* Read each line of ldd output. */ | |
2237 | while (fgets (buf, sizeof buf, inf) != (char *) 0) | |
2238 | { | |
2239 | int ch2; | |
2240 | char *name, *end, *p = buf; | |
2241 | ||
2242 | /* Extract names of libraries and add to list. */ | |
2243 | PARSE_LDD_OUTPUT (p); | |
2244 | if (p == 0) | |
2245 | continue; | |
2246 | ||
2247 | name = p; | |
2248 | if (strncmp (name, "not found", sizeof ("not found") - 1) == 0) | |
2249 | fatal ("dynamic dependency %s not found", buf); | |
2250 | ||
2251 | /* Find the end of the symbol name. */ | |
2252 | for (end = p; | |
2253 | (ch2 = *end) != '\0' && ch2 != '\n' && !ISSPACE (ch2) && ch2 != '|'; | |
2254 | end++) | |
2255 | continue; | |
2256 | *end = '\0'; | |
2257 | ||
2258 | if (access (name, R_OK) == 0) | |
2259 | add_to_list (&libraries, name); | |
2260 | else | |
2261 | fatal ("unable to open dynamic dependency '%s'", buf); | |
2262 | ||
2263 | if (debug) | |
2264 | fprintf (stderr, "\t%s\n", buf); | |
2265 | } | |
2266 | if (debug) | |
2267 | fprintf (stderr, "\n"); | |
2268 | ||
2269 | if (fclose (inf) != 0) | |
2270 | fatal_perror ("fclose"); | |
2271 | ||
2272 | do_wait (ldd_file_name); | |
2273 | ||
2274 | signal (SIGINT, int_handler); | |
2275 | #ifdef SIGQUIT | |
2276 | signal (SIGQUIT, quit_handler); | |
2277 | #endif | |
2278 | ||
2279 | /* Now iterate through the library list adding their symbols to | |
2280 | the list. */ | |
2281 | for (list = libraries.first; list; list = list->next) | |
2282 | scan_prog_file (list->name, PASS_LIB); | |
2283 | } | |
2284 | ||
2285 | #endif /* LDD_SUFFIX */ | |
2286 | ||
2287 | #endif /* OBJECT_FORMAT_NONE */ | |
2288 | ||
2289 | \f | |
2290 | /* | |
2291 | * COFF specific stuff. | |
2292 | */ | |
2293 | ||
2294 | #ifdef OBJECT_FORMAT_COFF | |
2295 | ||
2296 | #if defined (EXTENDED_COFF) | |
2297 | ||
2298 | # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax) | |
2299 | # define GCC_SYMENT SYMR | |
2300 | # define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal) | |
2301 | # define GCC_SYMINC(X) (1) | |
2302 | # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax) | |
2303 | # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0) | |
2304 | ||
2305 | #else | |
2306 | ||
2307 | # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms) | |
2308 | # define GCC_SYMENT SYMENT | |
2309 | # if defined (C_WEAKEXT) | |
2310 | # define GCC_OK_SYMBOL(X) \ | |
2311 | (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \ | |
2312 | ((X).n_scnum > N_UNDEF) && \ | |
2313 | (aix64_flag \ | |
2314 | || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \ | |
2315 | || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT)))) | |
2316 | # define GCC_UNDEF_SYMBOL(X) \ | |
2317 | (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \ | |
2318 | ((X).n_scnum == N_UNDEF)) | |
2319 | # else | |
2320 | # define GCC_OK_SYMBOL(X) \ | |
2321 | (((X).n_sclass == C_EXT) && \ | |
2322 | ((X).n_scnum > N_UNDEF) && \ | |
2323 | (aix64_flag \ | |
2324 | || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \ | |
2325 | || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT)))) | |
2326 | # define GCC_UNDEF_SYMBOL(X) \ | |
2327 | (((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF)) | |
2328 | # endif | |
2329 | # define GCC_SYMINC(X) ((X).n_numaux+1) | |
2330 | # define GCC_SYMZERO(X) 0 | |
2331 | ||
2332 | /* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */ | |
2333 | #ifdef _AIX51 | |
2334 | # define GCC_CHECK_HDR(X) \ | |
2335 | ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \ | |
2336 | || (HEADER (X).f_magic == 0767 && aix64_flag)) | |
2337 | #else | |
2338 | # define GCC_CHECK_HDR(X) \ | |
2339 | ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \ | |
2340 | || (HEADER (X).f_magic == 0757 && aix64_flag)) | |
2341 | #endif | |
2342 | ||
2343 | #endif | |
2344 | ||
2345 | #ifdef COLLECT_EXPORT_LIST | |
2346 | /* Array of standard AIX libraries which should not | |
2347 | be scanned for ctors/dtors. */ | |
2348 | static const char *const aix_std_libs[] = { | |
2349 | "/unix", | |
2350 | "/lib/libc.a", | |
2351 | "/lib/libm.a", | |
2352 | "/lib/libc_r.a", | |
2353 | "/lib/libm_r.a", | |
2354 | "/usr/lib/libc.a", | |
2355 | "/usr/lib/libm.a", | |
2356 | "/usr/lib/libc_r.a", | |
2357 | "/usr/lib/libm_r.a", | |
2358 | "/usr/lib/threads/libc.a", | |
2359 | "/usr/ccs/lib/libc.a", | |
2360 | "/usr/ccs/lib/libm.a", | |
2361 | "/usr/ccs/lib/libc_r.a", | |
2362 | "/usr/ccs/lib/libm_r.a", | |
2363 | NULL | |
2364 | }; | |
2365 | ||
2366 | /* This function checks the filename and returns 1 | |
2367 | if this name matches the location of a standard AIX library. */ | |
2368 | static int ignore_library (const char *); | |
2369 | static int | |
2370 | ignore_library (const char *name) | |
2371 | { | |
2372 | const char *const *p = &aix_std_libs[0]; | |
2373 | while (*p++ != NULL) | |
2374 | if (! strcmp (name, *p)) return 1; | |
2375 | return 0; | |
2376 | } | |
2377 | #endif /* COLLECT_EXPORT_LIST */ | |
2378 | ||
2379 | #if defined (HAVE_DECL_LDGETNAME) && !HAVE_DECL_LDGETNAME | |
2380 | extern char *ldgetname (LDFILE *, GCC_SYMENT *); | |
2381 | #endif | |
2382 | ||
2383 | /* COFF version to scan the name list of the loaded program for | |
2384 | the symbols g++ uses for static constructors and destructors. | |
2385 | ||
2386 | The constructor table begins at __CTOR_LIST__ and contains a count | |
2387 | of the number of pointers (or -1 if the constructors are built in a | |
2388 | separate section by the linker), followed by the pointers to the | |
2389 | constructor functions, terminated with a null pointer. The | |
2390 | destructor table has the same format, and begins at __DTOR_LIST__. */ | |
2391 | ||
2392 | static void | |
2393 | scan_prog_file (const char *prog_name, enum pass which_pass) | |
2394 | { | |
2395 | LDFILE *ldptr = NULL; | |
2396 | int sym_index, sym_count; | |
2397 | int is_shared = 0; | |
2398 | ||
2399 | if (which_pass != PASS_FIRST && which_pass != PASS_OBJ) | |
2400 | return; | |
2401 | ||
2402 | #ifdef COLLECT_EXPORT_LIST | |
2403 | /* We do not need scanning for some standard C libraries. */ | |
2404 | if (which_pass == PASS_FIRST && ignore_library (prog_name)) | |
2405 | return; | |
2406 | ||
2407 | /* On AIX we have a loop, because there is not much difference | |
2408 | between an object and an archive. This trick allows us to | |
2409 | eliminate scan_libraries() function. */ | |
2410 | do | |
2411 | { | |
2412 | #endif | |
2413 | /* Some platforms (e.g. OSF4) declare ldopen as taking a | |
2414 | non-const char * filename parameter, even though it will not | |
2415 | modify that string. So we must cast away const-ness here, | |
2416 | which will cause -Wcast-qual to burp. */ | |
2417 | if ((ldptr = ldopen ((char *)prog_name, ldptr)) != NULL) | |
2418 | { | |
2419 | if (! MY_ISCOFF (HEADER (ldptr).f_magic)) | |
2420 | fatal ("%s: not a COFF file", prog_name); | |
2421 | ||
2422 | if (GCC_CHECK_HDR (ldptr)) | |
2423 | { | |
2424 | sym_count = GCC_SYMBOLS (ldptr); | |
2425 | sym_index = GCC_SYMZERO (ldptr); | |
2426 | ||
2427 | #ifdef COLLECT_EXPORT_LIST | |
2428 | /* Is current archive member a shared object? */ | |
2429 | is_shared = HEADER (ldptr).f_flags & F_SHROBJ; | |
2430 | #endif | |
2431 | ||
2432 | while (sym_index < sym_count) | |
2433 | { | |
2434 | GCC_SYMENT symbol; | |
2435 | ||
2436 | if (ldtbread (ldptr, sym_index, &symbol) <= 0) | |
2437 | break; | |
2438 | sym_index += GCC_SYMINC (symbol); | |
2439 | ||
2440 | if (GCC_OK_SYMBOL (symbol)) | |
2441 | { | |
2442 | char *name; | |
2443 | ||
2444 | if ((name = ldgetname (ldptr, &symbol)) == NULL) | |
2445 | continue; /* Should never happen. */ | |
2446 | ||
2447 | #ifdef XCOFF_DEBUGGING_INFO | |
2448 | /* All AIX function names have a duplicate entry | |
2449 | beginning with a dot. */ | |
2450 | if (*name == '.') | |
2451 | ++name; | |
2452 | #endif | |
2453 | ||
2454 | switch (is_ctor_dtor (name)) | |
2455 | { | |
2456 | case 1: | |
2457 | if (! is_shared) | |
2458 | add_to_list (&constructors, name); | |
2459 | #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH) | |
2460 | if (which_pass == PASS_OBJ) | |
2461 | add_to_list (&exports, name); | |
2462 | #endif | |
2463 | break; | |
2464 | ||
2465 | case 2: | |
2466 | if (! is_shared) | |
2467 | add_to_list (&destructors, name); | |
2468 | #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH) | |
2469 | if (which_pass == PASS_OBJ) | |
2470 | add_to_list (&exports, name); | |
2471 | #endif | |
2472 | break; | |
2473 | ||
2474 | #ifdef COLLECT_EXPORT_LIST | |
2475 | case 3: | |
2476 | #ifndef LD_INIT_SWITCH | |
2477 | if (is_shared) | |
2478 | add_to_list (&constructors, name); | |
2479 | #endif | |
2480 | break; | |
2481 | ||
2482 | case 4: | |
2483 | #ifndef LD_INIT_SWITCH | |
2484 | if (is_shared) | |
2485 | add_to_list (&destructors, name); | |
2486 | #endif | |
2487 | break; | |
2488 | #endif | |
2489 | ||
2490 | case 5: | |
2491 | if (! is_shared) | |
2492 | add_to_list (&frame_tables, name); | |
2493 | #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH) | |
2494 | if (which_pass == PASS_OBJ) | |
2495 | add_to_list (&exports, name); | |
2496 | #endif | |
2497 | break; | |
2498 | ||
2499 | default: /* not a constructor or destructor */ | |
2500 | #ifdef COLLECT_EXPORT_LIST | |
2501 | /* Explicitly export all global symbols when | |
2502 | building a shared object on AIX, but do not | |
2503 | re-export symbols from another shared object | |
2504 | and do not export symbols if the user | |
2505 | provides an explicit export list. */ | |
2506 | if (shared_obj && !is_shared | |
2507 | && which_pass == PASS_OBJ && !export_flag) | |
2508 | add_to_list (&exports, name); | |
2509 | #endif | |
2510 | continue; | |
2511 | } | |
2512 | ||
2513 | if (debug) | |
2514 | #if !defined(EXTENDED_COFF) | |
2515 | fprintf (stderr, "\tsec=%d class=%d type=%s%o %s\n", | |
2516 | symbol.n_scnum, symbol.n_sclass, | |
2517 | (symbol.n_type ? "0" : ""), symbol.n_type, | |
2518 | name); | |
2519 | #else | |
2520 | fprintf (stderr, | |
2521 | "\tiss = %5d, value = %5ld, index = %5d, name = %s\n", | |
2522 | symbol.iss, (long) symbol.value, symbol.index, name); | |
2523 | #endif | |
2524 | } | |
2525 | } | |
2526 | } | |
2527 | #ifdef COLLECT_EXPORT_LIST | |
2528 | else | |
2529 | { | |
2530 | /* If archive contains both 32-bit and 64-bit objects, | |
2531 | we want to skip objects in other mode so mismatch normal. */ | |
2532 | if (debug) | |
2533 | fprintf (stderr, "%s : magic=%o aix64=%d mismatch\n", | |
2534 | prog_name, HEADER (ldptr).f_magic, aix64_flag); | |
2535 | } | |
2536 | #endif | |
2537 | } | |
2538 | else | |
2539 | { | |
2540 | fatal ("%s: cannot open as COFF file", prog_name); | |
2541 | } | |
2542 | #ifdef COLLECT_EXPORT_LIST | |
2543 | /* On AIX loop continues while there are more members in archive. */ | |
2544 | } | |
2545 | while (ldclose (ldptr) == FAILURE); | |
2546 | #else | |
2547 | /* Otherwise we simply close ldptr. */ | |
2548 | (void) ldclose(ldptr); | |
2549 | #endif | |
2550 | } | |
2551 | #endif /* OBJECT_FORMAT_COFF */ | |
2552 | ||
2553 | #ifdef COLLECT_EXPORT_LIST | |
2554 | /* Given a library name without "lib" prefix, this function | |
2555 | returns a full library name including a path. */ | |
2556 | static char * | |
2557 | resolve_lib_name (const char *name) | |
2558 | { | |
2559 | char *lib_buf; | |
2560 | int i, j, l = 0; | |
2561 | ||
2562 | for (i = 0; libpaths[i]; i++) | |
2563 | if (libpaths[i]->max_len > l) | |
2564 | l = libpaths[i]->max_len; | |
2565 | ||
2566 | lib_buf = xmalloc (l + strlen(name) + 10); | |
2567 | ||
2568 | for (i = 0; libpaths[i]; i++) | |
2569 | { | |
2570 | struct prefix_list *list = libpaths[i]->plist; | |
2571 | for (; list; list = list->next) | |
2572 | { | |
2573 | /* The following lines are needed because path_prefix list | |
2574 | may contain directories both with trailing '/' and | |
2575 | without it. */ | |
2576 | const char *p = ""; | |
2577 | if (list->prefix[strlen(list->prefix)-1] != '/') | |
2578 | p = "/"; | |
2579 | for (j = 0; libexts[j]; j++) | |
2580 | { | |
2581 | sprintf (lib_buf, "%s%slib%s.%s", | |
2582 | list->prefix, p, name, libexts[j]); | |
2583 | if (debug) fprintf (stderr, "searching for: %s\n", lib_buf); | |
2584 | if (file_exists (lib_buf)) | |
2585 | { | |
2586 | if (debug) fprintf (stderr, "found: %s\n", lib_buf); | |
2587 | return (lib_buf); | |
2588 | } | |
2589 | } | |
2590 | } | |
2591 | } | |
2592 | if (debug) | |
2593 | fprintf (stderr, "not found\n"); | |
2594 | else | |
2595 | fatal ("library lib%s not found", name); | |
2596 | return (NULL); | |
2597 | } | |
2598 | #endif /* COLLECT_EXPORT_LIST */ |