1 /* Collect static initialization info into data structures that can be
2 traversed by C++ initialization and finalization routines.
3 Copyright (C) 1992-2013 Free Software Foundation, Inc.
4 Contributed by Chris Smith (csmith@convex.com).
5 Heavily modified by Michael Meissner (meissner@cygnus.com),
6 Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com).
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
25 /* Build tables of static constructors and destructors and run ld. */
29 #include "coretypes.h"
31 #include "filenames.h"
32 #include "file-find.h"
34 /* TARGET_64BIT may be defined to use driver specific functionality. */
36 #define TARGET_64BIT TARGET_64BIT_DEFAULT
38 #ifndef LIBRARY_PATH_ENV
39 #define LIBRARY_PATH_ENV "LIBRARY_PATH"
45 #include "collect2-aix.h"
46 #include "diagnostic.h"
52 /* On certain systems, we have code that works by scanning the object file
53 directly. But this code uses system-specific header files and library
54 functions, so turn it off in a cross-compiler. Likewise, the names of
55 the utilities are not correct for a cross-compiler; we have to hope that
56 cross-versions are in the proper directories. */
58 #ifdef CROSS_DIRECTORY_STRUCTURE
59 #ifndef CROSS_AIX_SUPPORT
60 #undef OBJECT_FORMAT_COFF
63 #undef REAL_LD_FILE_NAME
64 #undef REAL_NM_FILE_NAME
65 #undef REAL_STRIP_FILE_NAME
68 /* If we cannot use a special method, use the ordinary one:
69 run nm to find what symbols are present.
70 In a cross-compiler, this means you need a cross nm,
71 but that is not quite as unpleasant as special headers. */
73 #if !defined (OBJECT_FORMAT_COFF)
74 #define OBJECT_FORMAT_NONE
77 #ifdef OBJECT_FORMAT_COFF
79 #ifndef CROSS_DIRECTORY_STRUCTURE
87 /* Many versions of ldfcn.h define these. */
96 /* Some systems have an ISCOFF macro, but others do not. In some cases
97 the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines
98 that either do not have an ISCOFF macro in /usr/include or for those
102 #define MY_ISCOFF(X) ISCOFF (X)
105 #endif /* OBJECT_FORMAT_COFF */
107 #ifdef OBJECT_FORMAT_NONE
109 /* Default flags to pass to nm. */
111 #define NM_FLAGS "-n"
114 #endif /* OBJECT_FORMAT_NONE */
116 /* Some systems use __main in a way incompatible with its use in gcc, in these
117 cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
118 give the same symbol without quotes for an alternative entry point. */
120 #define NAME__MAIN "__main"
123 /* This must match tree.h. */
124 #define DEFAULT_INIT_PRIORITY 65535
126 #ifndef COLLECT_SHARED_INIT_FUNC
127 #define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
128 fprintf ((STREAM), "void _GLOBAL__DI() {\n\t%s();\n}\n", (FUNC))
130 #ifndef COLLECT_SHARED_FINI_FUNC
131 #define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
132 fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC))
136 #define SCAN_LIBRARIES
140 #define SHLIB_SUFFIX ".so"
144 int do_collecting = 1;
146 int do_collecting = 0;
149 /* Cook up an always defined indication of whether we proceed the
150 "EXPORT_LIST" way. */
152 #ifdef COLLECT_EXPORT_LIST
153 #define DO_COLLECT_EXPORT_LIST 1
155 #define DO_COLLECT_EXPORT_LIST 0
158 /* Nonzero if we should suppress the automatic demangling of identifiers
159 in linker error messages. Set from COLLECT_NO_DEMANGLE. */
162 /* Linked lists of constructor and destructor names. */
178 bool vflag; /* true if -v or --version */
179 static int rflag; /* true if -r */
180 static int strip_flag; /* true if -s */
181 #ifdef COLLECT_EXPORT_LIST
182 static int export_flag; /* true if -bE */
183 static int aix64_flag; /* true if -b64 */
184 static int aixrtl_flag; /* true if -brtl */
188 LTO_MODE_NONE, /* Not doing LTO. */
189 LTO_MODE_LTO, /* Normal LTO. */
190 LTO_MODE_WHOPR /* WHOPR. */
193 /* Current LTO mode. */
194 static enum lto_mode_d lto_mode = LTO_MODE_NONE;
196 bool debug; /* true if -debug */
197 bool helpflag; /* true if --help */
199 static int shared_obj; /* true if -shared */
201 static const char *c_file; /* <xxx>.c for constructor/destructor list. */
202 static const char *o_file; /* <xxx>.o for constructor/destructor list. */
203 #ifdef COLLECT_EXPORT_LIST
204 static const char *export_file; /* <xxx>.x for AIX export list. */
206 static char **lto_o_files; /* Output files for LTO. */
207 const char *ldout; /* File for ld stdout. */
208 const char *lderrout; /* File for ld stderr. */
209 static const char *output_file; /* Output file for ld. */
210 static const char *nm_file_name; /* pathname of nm */
212 static const char *ldd_file_name; /* pathname of ldd (or equivalent) */
214 static const char *strip_file_name; /* pathname of strip */
215 const char *c_file_name; /* pathname of gcc */
216 static char *initname, *fininame; /* names of init and fini funcs */
218 static struct head constructors; /* list of constructors found */
219 static struct head destructors; /* list of destructors found */
220 #ifdef COLLECT_EXPORT_LIST
221 static struct head exports; /* list of exported symbols */
223 static struct head frame_tables; /* list of frame unwind info tables */
225 static bool at_file_supplied; /* Whether to use @file arguments */
226 static char *response_file; /* Name of any current response file */
228 struct obstack temporary_obstack;
229 char * temporary_firstobj;
231 /* A string that must be prepended to a target OS path in order to find
232 it on the host system. */
233 #ifdef TARGET_SYSTEM_ROOT
234 static const char *target_system_root = TARGET_SYSTEM_ROOT;
236 static const char *target_system_root = "";
239 /* Whether we may unlink the output file, which should be set as soon as we
240 know we have successfully produced it. This is typically useful to prevent
241 blindly attempting to unlink a read-only output that the target linker
242 would leave untouched. */
243 bool may_unlink_output_file = false;
245 #ifdef COLLECT_EXPORT_LIST
246 /* Lists to keep libraries to be scanned for global constructors/destructors. */
247 static struct head libs; /* list of libraries */
248 static struct path_prefix cmdline_lib_dirs; /* directories specified with -L */
249 static struct path_prefix libpath_lib_dirs; /* directories in LIBPATH */
250 static struct path_prefix *libpaths[3] = {&cmdline_lib_dirs,
251 &libpath_lib_dirs, NULL};
254 /* List of names of object files containing LTO information.
255 These are a subset of the object file names appearing on the
256 command line, and must be identical, in the sense of pointer
257 equality, with the names passed to maybe_run_lto_and_relink(). */
261 const char *name; /* Name of object file. */
262 struct lto_object *next; /* Next in linked list. */
265 struct lto_object_list
267 struct lto_object *first; /* First list element. */
268 struct lto_object *last; /* Last list element. */
271 static struct lto_object_list lto_objects;
273 /* Special kinds of symbols that a name may denote. */
276 SYM_REGULAR = 0, /* nothing special */
278 SYM_CTOR = 1, /* constructor */
279 SYM_DTOR = 2, /* destructor */
280 SYM_INIT = 3, /* shared object routine that calls all the ctors */
281 SYM_FINI = 4, /* shared object routine that calls all the dtors */
282 SYM_DWEH = 5 /* DWARF exception handling table */
285 static symkind is_ctor_dtor (const char *);
287 static void handler (int);
288 static void do_wait (const char *, struct pex_obj *);
289 static void fork_execute (const char *, char **);
290 static void maybe_unlink (const char *);
291 static void maybe_unlink_list (char **);
292 static void add_to_list (struct head *, const char *);
293 static int extract_init_priority (const char *);
294 static void sort_ids (struct head *);
295 static void write_list (FILE *, const char *, struct id *);
296 #ifdef COLLECT_EXPORT_LIST
297 static void dump_list (FILE *, const char *, struct id *);
300 static void dump_prefix_list (FILE *, const char *, struct prefix_list *);
302 static void write_list_with_asm (FILE *, const char *, struct id *);
303 static void write_c_file (FILE *, const char *);
304 static void write_c_file_stat (FILE *, const char *);
305 #ifndef LD_INIT_SWITCH
306 static void write_c_file_glob (FILE *, const char *);
308 #ifdef SCAN_LIBRARIES
309 static void scan_libraries (const char *);
311 #ifdef COLLECT_EXPORT_LIST
313 static int is_in_list (const char *, struct id *);
315 static void write_aix_file (FILE *, struct id *);
316 static char *resolve_lib_name (const char *);
318 static char *extract_string (const char **);
319 static void post_ld_pass (bool);
320 static void process_args (int *argcp, char **argv);
322 /* Enumerations describing which pass this is for scanning the
326 PASS_FIRST, /* without constructors */
327 PASS_OBJ, /* individual objects */
328 PASS_LIB, /* looking for shared libraries */
329 PASS_SECOND, /* with constructors linked in */
330 PASS_LTOINFO /* looking for objects with LTO info */
333 /* ... and which kinds of symbols are to be considered. */
335 enum scanfilter_masks {
338 SCAN_CTOR = 1 << SYM_CTOR,
339 SCAN_DTOR = 1 << SYM_DTOR,
340 SCAN_INIT = 1 << SYM_INIT,
341 SCAN_FINI = 1 << SYM_FINI,
342 SCAN_DWEH = 1 << SYM_DWEH,
346 /* This type is used for parameters and variables which hold
347 combinations of the flags in enum scanfilter_masks. */
348 typedef int scanfilter;
350 /* Scan the name list of the loaded program for the symbols g++ uses for
351 static constructors and destructors.
353 The SCANPASS argument tells which collect processing pass this is for and
354 the SCANFILTER argument tells which kinds of symbols to consider in this
355 pass. Symbols of a special kind not in the filter mask are considered as
358 The constructor table begins at __CTOR_LIST__ and contains a count of the
359 number of pointers (or -1 if the constructors are built in a separate
360 section by the linker), followed by the pointers to the constructor
361 functions, terminated with a null pointer. The destructor table has the
362 same format, and begins at __DTOR_LIST__. */
364 static void scan_prog_file (const char *, scanpass, scanfilter);
367 /* Delete tempfiles and exit function. */
370 collect_atexit (void)
372 if (c_file != 0 && c_file[0])
373 maybe_unlink (c_file);
375 if (o_file != 0 && o_file[0])
376 maybe_unlink (o_file);
378 #ifdef COLLECT_EXPORT_LIST
379 if (export_file != 0 && export_file[0])
380 maybe_unlink (export_file);
384 maybe_unlink_list (lto_o_files);
386 if (ldout != 0 && ldout[0])
388 dump_ld_file (ldout, stdout);
389 maybe_unlink (ldout);
392 if (lderrout != 0 && lderrout[0])
394 dump_ld_file (lderrout, stderr);
395 maybe_unlink (lderrout);
399 maybe_unlink (response_file);
403 /* Notify user of a non-error. */
405 notice (const char *cmsgid, ...)
409 va_start (ap, cmsgid);
410 vfprintf (stderr, _(cmsgid), ap);
414 /* Notify user of a non-error, without translating the format string. */
416 notice_translated (const char *cmsgid, ...)
420 va_start (ap, cmsgid);
421 vfprintf (stderr, cmsgid, ap);
428 if (c_file != 0 && c_file[0])
429 maybe_unlink (c_file);
431 if (o_file != 0 && o_file[0])
432 maybe_unlink (o_file);
434 if (ldout != 0 && ldout[0])
435 maybe_unlink (ldout);
437 if (lderrout != 0 && lderrout[0])
438 maybe_unlink (lderrout);
440 #ifdef COLLECT_EXPORT_LIST
441 if (export_file != 0 && export_file[0])
442 maybe_unlink (export_file);
446 maybe_unlink_list (lto_o_files);
449 maybe_unlink (response_file);
451 signal (signo, SIG_DFL);
457 file_exists (const char *name)
459 return access (name, R_OK) == 0;
462 /* Parse a reasonable subset of shell quoting syntax. */
465 extract_string (const char **pp)
478 obstack_1grow (&temporary_obstack, c);
479 else if (! inside && c == ' ')
481 else if (! inside && c == '\\')
486 obstack_1grow (&temporary_obstack, c);
489 obstack_1grow (&temporary_obstack, '\0');
491 return XOBFINISH (&temporary_obstack, char *);
495 dump_ld_file (const char *name, FILE *to)
497 FILE *stream = fopen (name, "r");
504 while (c = getc (stream),
505 c != EOF && (ISIDNUM (c) || c == '$' || c == '.'))
506 obstack_1grow (&temporary_obstack, c);
507 if (obstack_object_size (&temporary_obstack) > 0)
509 const char *word, *p;
511 obstack_1grow (&temporary_obstack, '\0');
512 word = XOBFINISH (&temporary_obstack, const char *);
515 ++word, putc ('.', to);
517 if (!strncmp (p, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX)))
518 p += strlen (USER_LABEL_PREFIX);
520 #ifdef HAVE_LD_DEMANGLE
526 result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE);
534 diff = strlen (word) - strlen (result);
535 while (diff > 0 && c == ' ')
536 --diff, putc (' ', to);
537 if (diff < 0 && c == ' ')
539 while (diff < 0 && c == ' ')
540 ++diff, c = getc (stream);
543 /* Make sure we output at least one space, or
544 the demangled symbol name will run into
545 whatever text follows. */
556 obstack_free (&temporary_obstack, temporary_firstobj);
565 /* Return the kind of symbol denoted by name S. */
568 is_ctor_dtor (const char *s)
570 struct names { const char *const name; const int len; symkind ret;
571 const int two_underscores; };
573 const struct names *p;
575 const char *orig_s = s;
577 static const struct names special[] = {
578 #ifndef NO_DOLLAR_IN_LABEL
579 { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, SYM_CTOR, 0 },
580 { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, SYM_DTOR, 0 },
582 #ifndef NO_DOT_IN_LABEL
583 { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, SYM_CTOR, 0 },
584 { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, SYM_DTOR, 0 },
585 #endif /* NO_DOT_IN_LABEL */
586 #endif /* NO_DOLLAR_IN_LABEL */
587 { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, SYM_CTOR, 0 },
588 { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, SYM_DTOR, 0 },
589 { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, SYM_DWEH, 0 },
590 { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, SYM_INIT, 0 },
591 { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, SYM_FINI, 0 },
592 { NULL, 0, SYM_REGULAR, 0 }
595 while ((ch = *s) == '_')
601 for (p = &special[0]; p->len > 0; p++)
604 && (!p->two_underscores || ((s - orig_s) >= 2))
605 && strncmp(s, p->name, p->len) == 0)
613 /* We maintain two prefix lists: one from COMPILER_PATH environment variable
614 and one from the PATH variable. */
616 static struct path_prefix cpath, path;
618 #ifdef CROSS_DIRECTORY_STRUCTURE
619 /* This is the name of the target machine. We use it to form the name
620 of the files to execute. */
622 static const char *const target_machine = TARGET_MACHINE;
625 /* Search for NAME using prefix list PPREFIX. We only look for executable
628 Return 0 if not found, otherwise return its name, allocated with malloc. */
630 #ifdef OBJECT_FORMAT_NONE
632 /* Add an entry for the object file NAME to object file list LIST.
633 New entries are added at the end of the list. The original pointer
634 value of NAME is preserved, i.e., no string copy is performed. */
637 add_lto_object (struct lto_object_list *list, const char *name)
639 struct lto_object *n = XNEW (struct lto_object);
644 list->last->next = n;
650 #endif /* OBJECT_FORMAT_NONE */
653 /* Perform a link-time recompilation and relink if any of the object
654 files contain LTO info. The linker command line LTO_LD_ARGV
655 represents the linker command that would produce a final executable
656 without the use of LTO. OBJECT_LST is a vector of object file names
657 appearing in LTO_LD_ARGV that are to be considered for link-time
658 recompilation, where OBJECT is a pointer to the last valid element.
659 (This awkward convention avoids an impedance mismatch with the
660 usage of similarly-named variables in main().) The elements of
661 OBJECT_LST must be identical, i.e., pointer equal, to the
662 corresponding arguments in LTO_LD_ARGV.
664 Upon entry, at least one linker run has been performed without the
665 use of any LTO info that might be present. Any recompilations
666 necessary for template instantiations have been performed, and
667 initializer/finalizer tables have been created if needed and
668 included in the linker command line LTO_LD_ARGV. If any of the
669 object files contain LTO info, we run the LTO back end on all such
670 files, and perform the final link with the LTO back end output
671 substituted for the LTO-optimized files. In some cases, a final
672 link with all link-time generated code has already been performed,
673 so there is no need to relink if no LTO info is found. In other
674 cases, our caller has not produced the final executable, and is
675 relying on us to perform the required link whether LTO info is
676 present or not. In that case, the FORCE argument should be true.
677 Note that the linker command line argument LTO_LD_ARGV passed into
678 this function may be modified in place. */
681 maybe_run_lto_and_relink (char **lto_ld_argv, char **object_lst,
682 const char **object, bool force)
684 const char **object_file = CONST_CAST2 (const char **, char **, object_lst);
686 int num_lto_c_args = 1; /* Allow space for the terminating NULL. */
688 while (object_file < object)
690 /* If file contains LTO info, add it to the list of LTO objects. */
691 scan_prog_file (*object_file++, PASS_LTOINFO, SCAN_ALL);
693 /* Increment the argument count by the number of object file arguments
694 we will add. An upper bound suffices, so just count all of the
695 object files regardless of whether they contain LTO info. */
699 if (lto_objects.first)
702 const char **lto_c_ptr;
705 struct lto_object *list;
706 char *lto_wrapper = getenv ("COLLECT_LTO_WRAPPER");
708 const char *prog = "lto-wrapper";
709 int lto_ld_argv_size = 0;
710 char **out_lto_ld_argv;
711 int out_lto_ld_argv_size;
715 fatal_error ("COLLECT_LTO_WRAPPER must be set");
719 /* There is at least one object file containing LTO info,
720 so we need to run the LTO back end and relink.
722 To do so we build updated ld arguments with first
723 LTO object replaced by all partitions and other LTO
726 lto_c_argv = (char **) xcalloc (sizeof (char *), num_lto_c_args);
727 lto_c_ptr = CONST_CAST2 (const char **, char **, lto_c_argv);
729 *lto_c_ptr++ = lto_wrapper;
731 /* Add LTO objects to the wrapper command line. */
732 for (list = lto_objects.first; list; list = list->next)
733 *lto_c_ptr++ = list->name;
737 /* Run the LTO back end. */
738 pex = collect_execute (prog, lto_c_argv, NULL, NULL, PEX_SEARCH);
745 stream = pex_read_output (pex, 0);
749 while ((c = getc (stream)) != EOF)
751 obstack_1grow (&temporary_obstack, c);
756 lto_o_files = XNEWVEC (char *, num_files + 1);
757 lto_o_files[num_files] = NULL;
758 start = XOBFINISH (&temporary_obstack, char *);
759 for (i = 0; i < num_files; ++i)
766 lto_o_files[i] = xstrdup (start);
771 obstack_free (&temporary_obstack, temporary_firstobj);
776 /* Compute memory needed for new LD arguments. At most number of original arguemtns
777 plus number of partitions. */
778 for (lto_ld_argv_size = 0; lto_ld_argv[lto_ld_argv_size]; lto_ld_argv_size++)
780 out_lto_ld_argv = XCNEWVEC(char *, num_files + lto_ld_argv_size + 1);
781 out_lto_ld_argv_size = 0;
783 /* After running the LTO back end, we will relink, substituting
784 the LTO output for the object files that we submitted to the
785 LTO. Here, we modify the linker command line for the relink. */
787 /* Copy all arguments until we find first LTO file. */
791 for (list = lto_objects.first; list; list = list->next)
792 if (*p == list->name) /* Note test for pointer equality! */
796 out_lto_ld_argv[out_lto_ld_argv_size++] = *p++;
799 /* Now insert all LTO partitions. */
800 lto_o_ptr = lto_o_files;
802 out_lto_ld_argv[out_lto_ld_argv_size++] = *lto_o_ptr++;
804 /* ... and copy the rest. */
807 for (list = lto_objects.first; list; list = list->next)
808 if (*p == list->name) /* Note test for pointer equality! */
811 out_lto_ld_argv[out_lto_ld_argv_size++] = *p;
814 out_lto_ld_argv[out_lto_ld_argv_size++] = 0;
816 /* Run the linker again, this time replacing the object files
817 optimized by the LTO with the temporary file generated by the LTO. */
818 fork_execute ("ld", out_lto_ld_argv);
822 maybe_unlink_list (lto_o_files);
826 /* Our caller is relying on us to do the link
827 even though there is no LTO back end work to be done. */
828 fork_execute ("ld", lto_ld_argv);
829 post_ld_pass (false);
836 main (int argc, char **argv)
845 } selected_linker = USE_DEFAULT_LD;
846 static const char *const ld_suffixes[USE_LD_MAX] =
853 static const char *const real_ld_suffix = "real-ld";
854 static const char *const collect_ld_suffix = "collect-ld";
855 static const char *const nm_suffix = "nm";
856 static const char *const gnm_suffix = "gnm";
858 static const char *const ldd_suffix = LDD_SUFFIX;
860 static const char *const strip_suffix = "strip";
861 static const char *const gstrip_suffix = "gstrip";
863 const char *full_ld_suffixes[USE_LD_MAX];
864 #ifdef CROSS_DIRECTORY_STRUCTURE
865 /* If we look for a program in the compiler directories, we just use
866 the short name, since these directories are already system-specific.
867 But it we look for a program in the system directories, we need to
868 qualify the program name with the target machine. */
870 const char *const full_nm_suffix =
871 concat (target_machine, "-", nm_suffix, NULL);
872 const char *const full_gnm_suffix =
873 concat (target_machine, "-", gnm_suffix, NULL);
875 const char *const full_ldd_suffix =
876 concat (target_machine, "-", ldd_suffix, NULL);
878 const char *const full_strip_suffix =
879 concat (target_machine, "-", strip_suffix, NULL);
880 const char *const full_gstrip_suffix =
881 concat (target_machine, "-", gstrip_suffix, NULL);
884 const char *const full_ldd_suffix = ldd_suffix;
886 const char *const full_nm_suffix = nm_suffix;
887 const char *const full_gnm_suffix = gnm_suffix;
888 const char *const full_strip_suffix = strip_suffix;
889 const char *const full_gstrip_suffix = gstrip_suffix;
890 #endif /* CROSS_DIRECTORY_STRUCTURE */
894 #ifdef COLLECT_EXPORT_LIST
897 const char *ld_file_name;
903 bool use_plugin = false;
904 bool use_collect_ld = false;
906 /* The kinds of symbols we will have to consider when scanning the
907 outcome of a first pass link. This is ALL to start with, then might
908 be adjusted before getting to the first pass link per se, typically on
909 AIX where we perform an early scan of objects and libraries to fetch
910 the list of global ctors/dtors and make sure they are not garbage
912 scanfilter ld1_filter = SCAN_ALL;
918 #ifdef TARGET_AIX_VERSION
919 int object_nbr = argc;
926 for (i = 0; i < USE_LD_MAX; i++)
928 #ifdef CROSS_DIRECTORY_STRUCTURE
929 = concat (target_machine, "-", ld_suffixes[i], NULL);
934 p = argv[0] + strlen (argv[0]);
935 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
939 xmalloc_set_program_name (progname);
942 expandargv (&argc, &argv);
943 if (argv != old_argv)
944 at_file_supplied = 1;
946 process_args (&argc, argv);
948 num_c_args = argc + 9;
950 #ifndef HAVE_LD_DEMANGLE
951 no_demangle = !! getenv ("COLLECT_NO_DEMANGLE");
953 /* Suppress demangling by the real linker, which may be broken. */
954 putenv (xstrdup ("COLLECT_NO_DEMANGLE=1"));
957 #if defined (COLLECT2_HOST_INITIALIZATION)
958 /* Perform system dependent initialization, if necessary. */
959 COLLECT2_HOST_INITIALIZATION;
963 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
964 receive the signal. A different setting is inheritable */
965 signal (SIGCHLD, SIG_DFL);
968 if (atexit (collect_atexit) != 0)
969 fatal_error ("atexit failed");
971 /* Unlock the stdio streams. */
972 unlock_std_streams ();
976 diagnostic_initialize (global_dc, 0);
978 /* Do not invoke xcalloc before this point, since locale needs to be
979 set first, in case a diagnostic is issued. */
981 ld1_argv = XCNEWVEC (char *, argc + 4);
982 ld1 = CONST_CAST2 (const char **, char **, ld1_argv);
983 ld2_argv = XCNEWVEC (char *, argc + 11);
984 ld2 = CONST_CAST2 (const char **, char **, ld2_argv);
985 object_lst = XCNEWVEC (char *, argc);
986 object = CONST_CAST2 (const char **, char **, object_lst);
992 /* Parse command line early for instances of -debug. This allows
993 the debug flag to be set before functions like find_a_file()
994 are called. We also look for the -flto or -flto-partition=none flag to know
995 what LTO mode we are in. */
997 bool no_partition = false;
999 for (i = 1; argv[i] != NULL; i ++)
1001 if (! strcmp (argv[i], "-debug"))
1003 else if (! strcmp (argv[i], "-flto-partition=none"))
1004 no_partition = true;
1005 else if ((! strncmp (argv[i], "-flto=", 6)
1006 || ! strcmp (argv[i], "-flto")) && ! use_plugin)
1007 lto_mode = LTO_MODE_WHOPR;
1008 else if (!strncmp (argv[i], "-fno-lto", 8))
1009 lto_mode = LTO_MODE_NONE;
1010 else if (! strcmp (argv[i], "-plugin"))
1013 lto_mode = LTO_MODE_NONE;
1014 if (selected_linker == USE_DEFAULT_LD)
1015 selected_linker = USE_PLUGIN_LD;
1017 else if (strcmp (argv[i], "-fuse-ld=bfd") == 0)
1018 selected_linker = USE_BFD_LD;
1019 else if (strcmp (argv[i], "-fuse-ld=gold") == 0)
1020 selected_linker = USE_GOLD_LD;
1022 #ifdef COLLECT_EXPORT_LIST
1023 /* These flags are position independent, although their order
1024 is important - subsequent flags override earlier ones. */
1025 else if (strcmp (argv[i], "-b64") == 0)
1027 /* -bexport:filename always needs the :filename */
1028 else if (strncmp (argv[i], "-bE:", 4) == 0
1029 || strncmp (argv[i], "-bexport:", 9) == 0)
1031 else if (strcmp (argv[i], "-brtl") == 0
1032 || strcmp (argv[i], "-bsvr4") == 0
1033 || strcmp (argv[i], "-G") == 0)
1035 else if (strcmp (argv[i], "-bnortl") == 0)
1040 find_file_set_debug (debug);
1041 if (no_partition && lto_mode == LTO_MODE_WHOPR)
1042 lto_mode = LTO_MODE_LTO;
1045 #ifndef DEFAULT_A_OUT_NAME
1046 output_file = "a.out";
1048 output_file = DEFAULT_A_OUT_NAME;
1051 obstack_begin (&temporary_obstack, 0);
1052 temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0);
1054 #ifndef HAVE_LD_DEMANGLE
1055 current_demangling_style = auto_demangling;
1057 p = getenv ("COLLECT_GCC_OPTIONS");
1060 const char *q = extract_string (&p);
1061 if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
1064 obstack_free (&temporary_obstack, temporary_firstobj);
1066 /* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities
1067 -fno-exceptions -w -fno-whole-program */
1070 c_argv = XCNEWVEC (char *, num_c_args);
1071 c_ptr = CONST_CAST2 (const char **, char **, c_argv);
1074 fatal_error ("no arguments");
1077 if (signal (SIGQUIT, SIG_IGN) != SIG_IGN)
1078 signal (SIGQUIT, handler);
1080 if (signal (SIGINT, SIG_IGN) != SIG_IGN)
1081 signal (SIGINT, handler);
1083 if (signal (SIGALRM, SIG_IGN) != SIG_IGN)
1084 signal (SIGALRM, handler);
1087 if (signal (SIGHUP, SIG_IGN) != SIG_IGN)
1088 signal (SIGHUP, handler);
1090 if (signal (SIGSEGV, SIG_IGN) != SIG_IGN)
1091 signal (SIGSEGV, handler);
1093 if (signal (SIGBUS, SIG_IGN) != SIG_IGN)
1094 signal (SIGBUS, handler);
1097 /* Extract COMPILER_PATH and PATH into our prefix list. */
1098 prefix_from_env ("COMPILER_PATH", &cpath);
1099 prefix_from_env ("PATH", &path);
1101 /* Try to discover a valid linker/nm/strip to use. */
1103 /* Maybe we know the right file to use (if not cross). */
1105 #ifdef DEFAULT_LINKER
1106 if (access (DEFAULT_LINKER, X_OK) == 0)
1107 ld_file_name = DEFAULT_LINKER;
1108 if (ld_file_name == 0)
1110 #ifdef REAL_LD_FILE_NAME
1111 ld_file_name = find_a_file (&path, REAL_LD_FILE_NAME, X_OK);
1112 if (ld_file_name == 0)
1114 /* Search the (target-specific) compiler dirs for ld'. */
1115 ld_file_name = find_a_file (&cpath, real_ld_suffix, X_OK);
1116 /* Likewise for `collect-ld'. */
1117 if (ld_file_name == 0)
1119 ld_file_name = find_a_file (&cpath, collect_ld_suffix, X_OK);
1120 use_collect_ld = ld_file_name != 0;
1122 /* Search the compiler directories for `ld'. We have protection against
1123 recursive calls in find_a_file. */
1124 if (ld_file_name == 0)
1125 ld_file_name = find_a_file (&cpath, ld_suffixes[selected_linker], X_OK);
1126 /* Search the ordinary system bin directories
1127 for `ld' (if native linking) or `TARGET-ld' (if cross). */
1128 if (ld_file_name == 0)
1129 ld_file_name = find_a_file (&path, full_ld_suffixes[selected_linker], X_OK);
1131 #ifdef REAL_NM_FILE_NAME
1132 nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME, X_OK);
1133 if (nm_file_name == 0)
1135 nm_file_name = find_a_file (&cpath, gnm_suffix, X_OK);
1136 if (nm_file_name == 0)
1137 nm_file_name = find_a_file (&path, full_gnm_suffix, X_OK);
1138 if (nm_file_name == 0)
1139 nm_file_name = find_a_file (&cpath, nm_suffix, X_OK);
1140 if (nm_file_name == 0)
1141 nm_file_name = find_a_file (&path, full_nm_suffix, X_OK);
1144 ldd_file_name = find_a_file (&cpath, ldd_suffix, X_OK);
1145 if (ldd_file_name == 0)
1146 ldd_file_name = find_a_file (&path, full_ldd_suffix, X_OK);
1149 #ifdef REAL_STRIP_FILE_NAME
1150 strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME, X_OK);
1151 if (strip_file_name == 0)
1153 strip_file_name = find_a_file (&cpath, gstrip_suffix, X_OK);
1154 if (strip_file_name == 0)
1155 strip_file_name = find_a_file (&path, full_gstrip_suffix, X_OK);
1156 if (strip_file_name == 0)
1157 strip_file_name = find_a_file (&cpath, strip_suffix, X_OK);
1158 if (strip_file_name == 0)
1159 strip_file_name = find_a_file (&path, full_strip_suffix, X_OK);
1161 /* Determine the full path name of the C compiler to use. */
1162 c_file_name = getenv ("COLLECT_GCC");
1163 if (c_file_name == 0)
1165 #ifdef CROSS_DIRECTORY_STRUCTURE
1166 c_file_name = concat (target_machine, "-gcc", NULL);
1168 c_file_name = "gcc";
1172 p = find_a_file (&cpath, c_file_name, X_OK);
1174 /* Here it should be safe to use the system search path since we should have
1175 already qualified the name of the compiler when it is needed. */
1177 p = find_a_file (&path, c_file_name, X_OK);
1182 *ld1++ = *ld2++ = ld_file_name;
1184 /* Make temp file names. */
1185 c_file = make_temp_file (".c");
1186 o_file = make_temp_file (".o");
1187 #ifdef COLLECT_EXPORT_LIST
1188 export_file = make_temp_file (".x");
1190 ldout = make_temp_file (".ld");
1191 lderrout = make_temp_file (".le");
1192 *c_ptr++ = c_file_name;
1199 #ifdef COLLECT_EXPORT_LIST
1200 /* Generate a list of directories from LIBPATH. */
1201 prefix_from_env ("LIBPATH", &libpath_lib_dirs);
1202 /* Add to this list also two standard directories where
1203 AIX loader always searches for libraries. */
1204 add_prefix (&libpath_lib_dirs, "/lib");
1205 add_prefix (&libpath_lib_dirs, "/usr/lib");
1208 /* Get any options that the upper GCC wants to pass to the sub-GCC.
1210 AIX support needs to know if -shared has been specified before
1211 parsing commandline arguments. */
1213 p = getenv ("COLLECT_GCC_OPTIONS");
1216 const char *q = extract_string (&p);
1217 if (*q == '-' && (q[1] == 'm' || q[1] == 'f'))
1218 *c_ptr++ = xstrdup (q);
1219 if (strcmp (q, "-EL") == 0 || strcmp (q, "-EB") == 0)
1220 *c_ptr++ = xstrdup (q);
1221 if (strcmp (q, "-shared") == 0)
1223 if (*q == '-' && q[1] == 'B')
1225 *c_ptr++ = xstrdup (q);
1228 q = extract_string (&p);
1229 *c_ptr++ = xstrdup (q);
1233 obstack_free (&temporary_obstack, temporary_firstobj);
1234 *c_ptr++ = "-fno-profile-arcs";
1235 *c_ptr++ = "-fno-test-coverage";
1236 *c_ptr++ = "-fno-branch-probabilities";
1237 *c_ptr++ = "-fno-exceptions";
1239 *c_ptr++ = "-fno-whole-program";
1241 /* !!! When GCC calls collect2,
1242 it does not know whether it is calling collect2 or ld.
1243 So collect2 cannot meaningfully understand any options
1244 except those ld understands.
1245 If you propose to make GCC pass some other option,
1246 just imagine what will happen if ld is really ld!!! */
1248 /* Parse arguments. Remember output file spec, pass the rest to ld. */
1249 /* After the first file, put in the c++ rt0. */
1252 while ((arg = *++argv) != (char *) 0)
1254 *ld1++ = *ld2++ = arg;
1261 if (!strcmp (arg, "-debug"))
1263 /* Already parsed. */
1267 if (!strcmp (arg, "-dynamic-linker") && argv[1])
1270 *ld1++ = *ld2++ = *argv;
1275 if (strncmp (arg, "-flto", 5) == 0)
1278 /* Do not pass LTO flag to the linker. */
1282 error ("LTO support has not been enabled in this "
1286 else if (!use_collect_ld
1287 && strncmp (arg, "-fuse-ld=", 9) == 0)
1289 /* Do not pass -fuse-ld={bfd|gold} to the linker. */
1293 #ifdef TARGET_AIX_VERSION
1296 /* File containing a list of input files to process. */
1299 char buf[MAXPATHLEN + 2];
1300 /* Number of additionnal object files. */
1302 /* Maximum of additionnal object files before vector
1305 const char *list_filename = arg + 2;
1307 /* Accept -fFILENAME and -f FILENAME. */
1308 if (*list_filename == '\0' && argv[1])
1311 list_filename = *argv;
1312 *ld1++ = *ld2++ = *argv;
1315 stream = fopen (list_filename, "r");
1317 fatal_error ("can't open %s: %m", list_filename);
1319 while (fgets (buf, sizeof buf, stream) != NULL)
1321 /* Remove end of line. */
1322 int len = strlen (buf);
1323 if (len >= 1 && buf[len - 1] =='\n')
1324 buf[len - 1] = '\0';
1326 /* Put on object vector.
1327 Note: we only expanse vector here, so we must keep
1328 extra space for remaining arguments. */
1329 if (add_nbr >= add_max)
1332 object - CONST_CAST2 (const char **, char **,
1334 add_max = (add_max == 0) ? 16 : add_max * 2;
1335 object_lst = XRESIZEVEC (char *, object_lst,
1336 object_nbr + add_max);
1337 object = CONST_CAST2 (const char **, char **,
1339 object_nbr += add_max;
1341 *object++ = xstrdup (buf);
1352 /* place o_file BEFORE this argument! */
1358 #ifdef COLLECT_EXPORT_LIST
1360 /* Resolving full library name. */
1361 const char *s = resolve_lib_name (arg+2);
1363 /* Saving a full library name. */
1364 add_to_list (&libs, s);
1369 #ifdef COLLECT_EXPORT_LIST
1370 /* Saving directories where to search for libraries. */
1372 add_prefix (&cmdline_lib_dirs, arg+2);
1378 output_file = *ld1++ = *ld2++ = *++argv;
1380 output_file = &arg[2];
1389 if (arg[2] == '\0' && do_collecting)
1391 /* We must strip after the nm run, otherwise C++ linking
1392 will not work. Thus we strip in the second ld run, or
1393 else with strip if there is no second ld run. */
1405 if (strcmp (arg, "--no-demangle") == 0)
1407 #ifndef HAVE_LD_DEMANGLE
1413 else if (strncmp (arg, "--demangle", 10) == 0)
1415 #ifndef HAVE_LD_DEMANGLE
1419 enum demangling_styles style
1420 = cplus_demangle_name_to_style (arg+11);
1421 if (style == unknown_demangling)
1422 error ("unknown demangling style '%s'", arg+11);
1424 current_demangling_style = style;
1430 else if (strncmp (arg, "--sysroot=", 10) == 0)
1431 target_system_root = arg + 10;
1432 else if (strcmp (arg, "--version") == 0)
1434 else if (strcmp (arg, "--help") == 0)
1439 else if ((p = strrchr (arg, '.')) != (char *) 0
1440 && (strcmp (p, ".o") == 0 || strcmp (p, ".a") == 0
1441 || strcmp (p, ".so") == 0 || strcmp (p, ".lo") == 0
1442 || strcmp (p, ".obj") == 0))
1451 /* place o_file BEFORE this argument! */
1457 if (p[1] == 'o' || p[1] == 'l')
1459 #ifdef COLLECT_EXPORT_LIST
1460 /* libraries can be specified directly, i.e. without -l flag. */
1463 /* Saving a full library name. */
1464 add_to_list (&libs, arg);
1470 #ifdef COLLECT_EXPORT_LIST
1471 /* This is added only for debugging purposes. */
1474 fprintf (stderr, "List of libraries:\n");
1475 dump_list (stderr, "\t", libs.first);
1478 /* The AIX linker will discard static constructors in object files if
1479 nothing else in the file is referenced, so look at them first. Unless
1480 we are building a shared object, ignore the eh frame tables, as we
1481 would otherwise reference them all, hence drag all the corresponding
1482 objects even if nothing else is referenced. */
1484 const char **export_object_lst
1485 = CONST_CAST2 (const char **, char **, object_lst);
1487 struct id *list = libs.first;
1489 /* Compute the filter to use from the current one, do scan, then adjust
1490 the "current" filter to remove what we just included here. This will
1491 control whether we need a first pass link later on or not, and what
1492 will remain to be scanned there. */
1494 scanfilter this_filter = ld1_filter;
1497 this_filter &= ~SCAN_DWEH;
1500 while (export_object_lst < object)
1501 scan_prog_file (*export_object_lst++, PASS_OBJ, this_filter);
1503 for (; list; list = list->next)
1504 scan_prog_file (list->name, PASS_FIRST, this_filter);
1506 ld1_filter = ld1_filter & ~this_filter;
1511 char *buf = concat ("-bE:", export_file, NULL);
1516 exportf = fopen (export_file, "w");
1517 if (exportf == (FILE *) 0)
1518 fatal_error ("fopen %s: %m", export_file);
1519 write_aix_file (exportf, exports.first);
1520 if (fclose (exportf))
1521 fatal_error ("fclose %s: %m", export_file);
1526 *c_ptr = *ld1 = *object = (char *) 0;
1529 notice ("collect2 version %s\n", version_string);
1533 printf ("Usage: collect2 [options]\n");
1534 printf (" Wrap linker and generate constructor code if needed.\n");
1535 printf (" Options:\n");
1536 printf (" -debug Enable debug output\n");
1537 printf (" --help Display this information\n");
1538 printf (" -v, --version Display this program's version number\n");
1540 printf ("Overview: http://gcc.gnu.org/onlinedocs/gccint/Collect2.html\n");
1541 printf ("Report bugs: %s\n", bug_report_url);
1548 fprintf (stderr, "ld_file_name = %s\n",
1549 (ld_file_name ? ld_file_name : "not found"));
1550 fprintf (stderr, "c_file_name = %s\n",
1551 (c_file_name ? c_file_name : "not found"));
1552 fprintf (stderr, "nm_file_name = %s\n",
1553 (nm_file_name ? nm_file_name : "not found"));
1555 fprintf (stderr, "ldd_file_name = %s\n",
1556 (ldd_file_name ? ldd_file_name : "not found"));
1558 fprintf (stderr, "strip_file_name = %s\n",
1559 (strip_file_name ? strip_file_name : "not found"));
1560 fprintf (stderr, "c_file = %s\n",
1561 (c_file ? c_file : "not found"));
1562 fprintf (stderr, "o_file = %s\n",
1563 (o_file ? o_file : "not found"));
1565 ptr = getenv ("COLLECT_GCC_OPTIONS");
1567 fprintf (stderr, "COLLECT_GCC_OPTIONS = %s\n", ptr);
1569 ptr = getenv ("COLLECT_GCC");
1571 fprintf (stderr, "COLLECT_GCC = %s\n", ptr);
1573 ptr = getenv ("COMPILER_PATH");
1575 fprintf (stderr, "COMPILER_PATH = %s\n", ptr);
1577 ptr = getenv (LIBRARY_PATH_ENV);
1579 fprintf (stderr, "%-20s= %s\n", LIBRARY_PATH_ENV, ptr);
1581 fprintf (stderr, "\n");
1584 /* Load the program, searching all libraries and attempting to provide
1585 undefined symbols from repository information.
1587 If -r or they will be run via some other method, do not build the
1588 constructor or destructor list, just return now. */
1591 = rflag || (! DO_COLLECT_EXPORT_LIST && ! do_collecting);
1593 /* Perform the first pass link now, if we're about to exit or if we need
1594 to scan for things we haven't collected yet before pursuing further.
1596 On AIX, the latter typically includes nothing for shared objects or
1597 frame tables for an executable, out of what the required early scan on
1598 objects and libraries has performed above. In the !shared_obj case, we
1599 expect the relevant tables to be dragged together with their associated
1600 functions from precise cross reference insertions by the compiler. */
1602 if (early_exit || ld1_filter != SCAN_NOTHING)
1603 do_tlink (ld1_argv, object_lst);
1607 #ifdef COLLECT_EXPORT_LIST
1608 /* Make sure we delete the export file we may have created. */
1609 if (export_file != 0 && export_file[0])
1610 maybe_unlink (export_file);
1612 if (lto_mode != LTO_MODE_NONE)
1613 maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
1615 post_ld_pass (false);
1617 maybe_unlink (c_file);
1618 maybe_unlink (o_file);
1623 /* Unless we have done it all already, examine the namelist and search for
1624 static constructors and destructors to call. Write the constructor and
1625 destructor tables to a .s file and reload. */
1627 if (ld1_filter != SCAN_NOTHING)
1628 scan_prog_file (output_file, PASS_FIRST, ld1_filter);
1630 #ifdef SCAN_LIBRARIES
1631 scan_libraries (output_file);
1636 notice_translated (ngettext ("%d constructor found\n",
1637 "%d constructors found\n",
1638 constructors.number),
1639 constructors.number);
1640 notice_translated (ngettext ("%d destructor found\n",
1641 "%d destructors found\n",
1642 destructors.number),
1643 destructors.number);
1644 notice_translated (ngettext("%d frame table found\n",
1645 "%d frame tables found\n",
1646 frame_tables.number),
1647 frame_tables.number);
1650 /* If the scan exposed nothing of special interest, there's no need to
1651 generate the glue code and relink so return now. */
1653 if (constructors.number == 0 && destructors.number == 0
1654 && frame_tables.number == 0
1655 #if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST)
1656 /* If we will be running these functions ourselves, we want to emit
1657 stubs into the shared library so that we do not have to relink
1658 dependent programs when we add static objects. */
1663 /* Do tlink without additional code generation now if we didn't
1664 do it earlier for scanning purposes. */
1665 if (ld1_filter == SCAN_NOTHING)
1666 do_tlink (ld1_argv, object_lst);
1669 maybe_run_lto_and_relink (ld1_argv, object_lst, object, false);
1671 /* Strip now if it was requested on the command line. */
1674 char **real_strip_argv = XCNEWVEC (char *, 3);
1675 const char ** strip_argv = CONST_CAST2 (const char **, char **,
1678 strip_argv[0] = strip_file_name;
1679 strip_argv[1] = output_file;
1680 strip_argv[2] = (char *) 0;
1681 fork_execute ("strip", real_strip_argv);
1684 #ifdef COLLECT_EXPORT_LIST
1685 maybe_unlink (export_file);
1687 post_ld_pass (false);
1689 maybe_unlink (c_file);
1690 maybe_unlink (o_file);
1694 /* Sort ctor and dtor lists by priority. */
1695 sort_ids (&constructors);
1696 sort_ids (&destructors);
1698 maybe_unlink(output_file);
1699 outf = fopen (c_file, "w");
1700 if (outf == (FILE *) 0)
1701 fatal_error ("fopen %s: %m", c_file);
1703 write_c_file (outf, c_file);
1706 fatal_error ("fclose %s: %m", c_file);
1708 /* Tell the linker that we have initializer and finalizer functions. */
1709 #ifdef LD_INIT_SWITCH
1710 #ifdef COLLECT_EXPORT_LIST
1711 *ld2++ = concat (LD_INIT_SWITCH, ":", initname, ":", fininame, NULL);
1713 *ld2++ = LD_INIT_SWITCH;
1715 *ld2++ = LD_FINI_SWITCH;
1720 #ifdef COLLECT_EXPORT_LIST
1723 /* If we did not add export flag to link arguments before, add it to
1724 second link phase now. No new exports should have been added. */
1725 if (! exports.first)
1726 *ld2++ = concat ("-bE:", export_file, NULL);
1728 #ifndef LD_INIT_SWITCH
1729 add_to_list (&exports, initname);
1730 add_to_list (&exports, fininame);
1731 add_to_list (&exports, "_GLOBAL__DI");
1732 add_to_list (&exports, "_GLOBAL__DD");
1734 exportf = fopen (export_file, "w");
1735 if (exportf == (FILE *) 0)
1736 fatal_error ("fopen %s: %m", export_file);
1737 write_aix_file (exportf, exports.first);
1738 if (fclose (exportf))
1739 fatal_error ("fclose %s: %m", export_file);
1743 /* End of arguments to second link phase. */
1748 fprintf (stderr, "\n========== output_file = %s, c_file = %s\n",
1749 output_file, c_file);
1750 write_c_file (stderr, "stderr");
1751 fprintf (stderr, "========== end of c_file\n\n");
1752 #ifdef COLLECT_EXPORT_LIST
1753 fprintf (stderr, "\n========== export_file = %s\n", export_file);
1754 write_aix_file (stderr, exports.first);
1755 fprintf (stderr, "========== end of export_file\n\n");
1759 /* Assemble the constructor and destructor tables.
1760 Link the tables in with the rest of the program. */
1762 fork_execute ("gcc", c_argv);
1763 #ifdef COLLECT_EXPORT_LIST
1764 /* On AIX we must call tlink because of possible templates resolution. */
1765 do_tlink (ld2_argv, object_lst);
1768 maybe_run_lto_and_relink (ld2_argv, object_lst, object, false);
1770 /* Otherwise, simply call ld because tlink is already done. */
1772 maybe_run_lto_and_relink (ld2_argv, object_lst, object, true);
1775 fork_execute ("ld", ld2_argv);
1776 post_ld_pass (false);
1779 /* Let scan_prog_file do any final mods (OSF/rose needs this for
1780 constructors/destructors in shared libraries. */
1781 scan_prog_file (output_file, PASS_SECOND, SCAN_ALL);
1784 maybe_unlink (c_file);
1785 maybe_unlink (o_file);
1787 #ifdef COLLECT_EXPORT_LIST
1788 maybe_unlink (export_file);
1795 /* Wait for a process to finish, and exit if a nonzero status is found. */
1798 collect_wait (const char *prog, struct pex_obj *pex)
1802 if (!pex_get_status (pex, 1, &status))
1803 fatal_error ("can't get program status: %m");
1808 if (WIFSIGNALED (status))
1810 int sig = WTERMSIG (status);
1811 error ("%s terminated with signal %d [%s]%s",
1812 prog, sig, strsignal(sig),
1813 WCOREDUMP(status) ? ", core dumped" : "");
1814 exit (FATAL_EXIT_CODE);
1817 if (WIFEXITED (status))
1818 return WEXITSTATUS (status);
1824 do_wait (const char *prog, struct pex_obj *pex)
1826 int ret = collect_wait (prog, pex);
1829 error ("%s returned %d exit status", prog, ret);
1835 unlink (response_file);
1836 response_file = NULL;
1841 /* Execute a program, and wait for the reply. */
1844 collect_execute (const char *prog, char **argv, const char *outname,
1845 const char *errname, int flags)
1847 struct pex_obj *pex;
1850 char *response_arg = NULL;
1851 char *response_argv[3] ATTRIBUTE_UNUSED;
1853 if (HAVE_GNU_LD && at_file_supplied && argv[0] != NULL)
1855 /* If using @file arguments, create a temporary file and put the
1856 contents of argv into it. Then change argv to an array corresponding
1857 to a single argument @FILE, where FILE is the temporary filename. */
1859 char **current_argv = argv + 1;
1860 char *argv0 = argv[0];
1864 /* Note: we assume argv contains at least one element; this is
1867 response_file = make_temp_file ("");
1869 f = fopen (response_file, "w");
1872 fatal_error ("could not open response file %s", response_file);
1874 status = writeargv (current_argv, f);
1877 fatal_error ("could not write to response file %s", response_file);
1879 status = fclose (f);
1882 fatal_error ("could not close response file %s", response_file);
1884 response_arg = concat ("@", response_file, NULL);
1885 response_argv[0] = argv0;
1886 response_argv[1] = response_arg;
1887 response_argv[2] = NULL;
1889 argv = response_argv;
1898 fprintf (stderr, "%s", argv[0]);
1900 notice ("[cannot find %s]", prog);
1902 for (p_argv = &argv[1]; (str = *p_argv) != (char *) 0; p_argv++)
1903 fprintf (stderr, " %s", str);
1905 fprintf (stderr, "\n");
1911 /* If we cannot find a program we need, complain error. Do this here
1912 since we might not end up needing something that we could not find. */
1915 fatal_error ("cannot find '%s'", prog);
1917 pex = pex_init (0, "collect2", NULL);
1919 fatal_error ("pex_init failed: %m");
1921 errmsg = pex_run (pex, flags, argv[0], argv, outname,
1928 fatal_error ("%s: %m", _(errmsg));
1931 fatal_error (errmsg);
1934 free (response_arg);
1940 fork_execute (const char *prog, char **argv)
1942 struct pex_obj *pex;
1944 pex = collect_execute (prog, argv, NULL, NULL, PEX_LAST | PEX_SEARCH);
1945 do_wait (prog, pex);
1948 /* Unlink FILE unless we are debugging or this is the output_file
1949 and we may not unlink it. */
1952 maybe_unlink (const char *file)
1956 notice ("[Leaving %s]\n", file);
1960 if (file == output_file && !may_unlink_output_file)
1963 unlink_if_ordinary (file);
1966 /* Call maybe_unlink on the NULL-terminated list, FILE_LIST. */
1969 maybe_unlink_list (char **file_list)
1971 char **tmp = file_list;
1974 maybe_unlink (*(tmp++));
1978 static long sequence_number = 0;
1980 /* Add a name to a linked list. */
1983 add_to_list (struct head *head_ptr, const char *name)
1986 = (struct id *) xcalloc (sizeof (struct id) + strlen (name), 1);
1988 strcpy (newid->name, name);
1990 if (head_ptr->first)
1991 head_ptr->last->next = newid;
1993 head_ptr->first = newid;
1995 /* Check for duplicate symbols. */
1996 for (p = head_ptr->first;
1997 strcmp (name, p->name) != 0;
2002 head_ptr->last->next = 0;
2007 newid->sequence = ++sequence_number;
2008 head_ptr->last = newid;
2012 /* Grab the init priority number from an init function name that
2013 looks like "_GLOBAL_.I.12345.foo". */
2016 extract_init_priority (const char *name)
2020 while (name[pos] == '_')
2022 pos += 10; /* strlen ("GLOBAL__X_") */
2024 /* Extract init_p number from ctor/dtor name. */
2025 pri = atoi (name + pos);
2026 return pri ? pri : DEFAULT_INIT_PRIORITY;
2029 /* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order.
2030 ctors will be run from right to left, dtors from left to right. */
2033 sort_ids (struct head *head_ptr)
2035 /* id holds the current element to insert. id_next holds the next
2036 element to insert. id_ptr iterates through the already sorted elements
2037 looking for the place to insert id. */
2038 struct id *id, *id_next, **id_ptr;
2040 id = head_ptr->first;
2042 /* We don't have any sorted elements yet. */
2043 head_ptr->first = NULL;
2045 for (; id; id = id_next)
2048 id->sequence = extract_init_priority (id->name);
2050 for (id_ptr = &(head_ptr->first); ; id_ptr = &((*id_ptr)->next))
2052 /* If the sequence numbers are the same, we put the id from the
2053 file later on the command line later in the list. */
2054 || id->sequence > (*id_ptr)->sequence
2055 /* Hack: do lexical compare, too.
2056 || (id->sequence == (*id_ptr)->sequence
2057 && strcmp (id->name, (*id_ptr)->name) > 0) */
2066 /* Now set the sequence numbers properly so write_c_file works. */
2067 for (id = head_ptr->first; id; id = id->next)
2068 id->sequence = ++sequence_number;
2071 /* Write: `prefix', the names on list LIST, `suffix'. */
2074 write_list (FILE *stream, const char *prefix, struct id *list)
2078 fprintf (stream, "%sx%d,\n", prefix, list->sequence);
2083 #ifdef COLLECT_EXPORT_LIST
2084 /* This function is really used only on AIX, but may be useful. */
2087 is_in_list (const char *prefix, struct id *list)
2091 if (!strcmp (prefix, list->name)) return 1;
2097 #endif /* COLLECT_EXPORT_LIST */
2099 /* Added for debugging purpose. */
2100 #ifdef COLLECT_EXPORT_LIST
2102 dump_list (FILE *stream, const char *prefix, struct id *list)
2106 fprintf (stream, "%s%s,\n", prefix, list->name);
2114 dump_prefix_list (FILE *stream, const char *prefix, struct prefix_list *list)
2118 fprintf (stream, "%s%s,\n", prefix, list->prefix);
2125 write_list_with_asm (FILE *stream, const char *prefix, struct id *list)
2129 fprintf (stream, "%sx%d __asm__ (\"%s\");\n",
2130 prefix, list->sequence, list->name);
2135 /* Write out the constructor and destructor tables statically (for a shared
2136 object), along with the functions to execute them. */
2139 write_c_file_stat (FILE *stream, const char *name ATTRIBUTE_UNUSED)
2143 int frames = (frame_tables.number > 0);
2145 /* Figure out name of output_file, stripping off .so version. */
2146 q = p = lbasename (output_file);
2158 if (filename_ncmp (q, SHLIB_SUFFIX, strlen (SHLIB_SUFFIX)) == 0)
2160 q += strlen (SHLIB_SUFFIX);
2167 /* q points to null at end of the string (or . of the .so version) */
2168 prefix = XNEWVEC (char, q - p + 1);
2169 strncpy (prefix, p, q - p);
2171 for (r = prefix; *r; r++)
2172 if (!ISALNUM ((unsigned char)*r))
2175 notice ("\nwrite_c_file - output name is %s, prefix is %s\n",
2176 output_file, prefix);
2178 initname = concat ("_GLOBAL__FI_", prefix, NULL);
2179 fininame = concat ("_GLOBAL__FD_", prefix, NULL);
2183 /* Write the tables as C code. */
2185 fprintf (stream, "static int count;\n");
2186 fprintf (stream, "typedef void entry_pt();\n");
2187 write_list_with_asm (stream, "extern entry_pt ", constructors.first);
2191 write_list_with_asm (stream, "extern void *", frame_tables.first);
2193 fprintf (stream, "\tstatic void *frame_table[] = {\n");
2194 write_list (stream, "\t\t&", frame_tables.first);
2195 fprintf (stream, "\t0\n};\n");
2197 /* This must match what's in frame.h. */
2198 fprintf (stream, "struct object {\n");
2199 fprintf (stream, " void *pc_begin;\n");
2200 fprintf (stream, " void *pc_end;\n");
2201 fprintf (stream, " void *fde_begin;\n");
2202 fprintf (stream, " void *fde_array;\n");
2203 fprintf (stream, " __SIZE_TYPE__ count;\n");
2204 fprintf (stream, " struct object *next;\n");
2205 fprintf (stream, "};\n");
2207 fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
2208 fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
2210 fprintf (stream, "static void reg_frame () {\n");
2211 fprintf (stream, "\tstatic struct object ob;\n");
2212 fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
2213 fprintf (stream, "\t}\n");
2215 fprintf (stream, "static void dereg_frame () {\n");
2216 fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
2217 fprintf (stream, "\t}\n");
2220 fprintf (stream, "void %s() {\n", initname);
2221 if (constructors.number > 0 || frames)
2223 fprintf (stream, "\tstatic entry_pt *ctors[] = {\n");
2224 write_list (stream, "\t\t", constructors.first);
2226 fprintf (stream, "\treg_frame,\n");
2227 fprintf (stream, "\t};\n");
2228 fprintf (stream, "\tentry_pt **p;\n");
2229 fprintf (stream, "\tif (count++ != 0) return;\n");
2230 fprintf (stream, "\tp = ctors + %d;\n", constructors.number + frames);
2231 fprintf (stream, "\twhile (p > ctors) (*--p)();\n");
2234 fprintf (stream, "\t++count;\n");
2235 fprintf (stream, "}\n");
2236 write_list_with_asm (stream, "extern entry_pt ", destructors.first);
2237 fprintf (stream, "void %s() {\n", fininame);
2238 if (destructors.number > 0 || frames)
2240 fprintf (stream, "\tstatic entry_pt *dtors[] = {\n");
2241 write_list (stream, "\t\t", destructors.first);
2243 fprintf (stream, "\tdereg_frame,\n");
2244 fprintf (stream, "\t};\n");
2245 fprintf (stream, "\tentry_pt **p;\n");
2246 fprintf (stream, "\tif (--count != 0) return;\n");
2247 fprintf (stream, "\tp = dtors;\n");
2248 fprintf (stream, "\twhile (p < dtors + %d) (*p++)();\n",
2249 destructors.number + frames);
2251 fprintf (stream, "}\n");
2255 COLLECT_SHARED_INIT_FUNC(stream, initname);
2256 COLLECT_SHARED_FINI_FUNC(stream, fininame);
2260 /* Write the constructor/destructor tables. */
2262 #ifndef LD_INIT_SWITCH
2264 write_c_file_glob (FILE *stream, const char *name ATTRIBUTE_UNUSED)
2266 /* Write the tables as C code. */
2268 int frames = (frame_tables.number > 0);
2270 fprintf (stream, "typedef void entry_pt();\n\n");
2272 write_list_with_asm (stream, "extern entry_pt ", constructors.first);
2276 write_list_with_asm (stream, "extern void *", frame_tables.first);
2278 fprintf (stream, "\tstatic void *frame_table[] = {\n");
2279 write_list (stream, "\t\t&", frame_tables.first);
2280 fprintf (stream, "\t0\n};\n");
2282 /* This must match what's in frame.h. */
2283 fprintf (stream, "struct object {\n");
2284 fprintf (stream, " void *pc_begin;\n");
2285 fprintf (stream, " void *pc_end;\n");
2286 fprintf (stream, " void *fde_begin;\n");
2287 fprintf (stream, " void *fde_array;\n");
2288 fprintf (stream, " __SIZE_TYPE__ count;\n");
2289 fprintf (stream, " struct object *next;\n");
2290 fprintf (stream, "};\n");
2292 fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n");
2293 fprintf (stream, "extern void *__deregister_frame_info (void *);\n");
2295 fprintf (stream, "static void reg_frame () {\n");
2296 fprintf (stream, "\tstatic struct object ob;\n");
2297 fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n");
2298 fprintf (stream, "\t}\n");
2300 fprintf (stream, "static void dereg_frame () {\n");
2301 fprintf (stream, "\t__deregister_frame_info (frame_table);\n");
2302 fprintf (stream, "\t}\n");
2305 fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n");
2306 fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number + frames);
2307 write_list (stream, "\t", constructors.first);
2309 fprintf (stream, "\treg_frame,\n");
2310 fprintf (stream, "\t0\n};\n\n");
2312 write_list_with_asm (stream, "extern entry_pt ", destructors.first);
2314 fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n");
2315 fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number + frames);
2316 write_list (stream, "\t", destructors.first);
2318 fprintf (stream, "\tdereg_frame,\n");
2319 fprintf (stream, "\t0\n};\n\n");
2321 fprintf (stream, "extern entry_pt %s;\n", NAME__MAIN);
2322 fprintf (stream, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN);
2324 #endif /* ! LD_INIT_SWITCH */
2327 write_c_file (FILE *stream, const char *name)
2329 #ifndef LD_INIT_SWITCH
2331 write_c_file_glob (stream, name);
2334 write_c_file_stat (stream, name);
2337 #ifdef COLLECT_EXPORT_LIST
2339 write_aix_file (FILE *stream, struct id *list)
2341 for (; list; list = list->next)
2343 fputs (list->name, stream);
2344 putc ('\n', stream);
2349 #ifdef OBJECT_FORMAT_NONE
2351 /* Check to make sure the file is an LTO object file. */
2354 maybe_lto_object_file (const char *prog_name)
2357 unsigned char buf[4];
2360 static unsigned char elfmagic[4] = { 0x7f, 'E', 'L', 'F' };
2361 static unsigned char coffmagic[2] = { 0x4c, 0x01 };
2362 static unsigned char coffmagic_x64[2] = { 0x64, 0x86 };
2363 static unsigned char machomagic[4][4] = {
2364 { 0xcf, 0xfa, 0xed, 0xfe },
2365 { 0xce, 0xfa, 0xed, 0xfe },
2366 { 0xfe, 0xed, 0xfa, 0xcf },
2367 { 0xfe, 0xed, 0xfa, 0xce }
2370 f = fopen (prog_name, "rb");
2373 if (fread (buf, sizeof (buf), 1, f) != 1)
2377 if (memcmp (buf, elfmagic, sizeof (elfmagic)) == 0
2378 || memcmp (buf, coffmagic, sizeof (coffmagic)) == 0
2379 || memcmp (buf, coffmagic_x64, sizeof (coffmagic_x64)) == 0)
2381 for (i = 0; i < 4; i++)
2382 if (memcmp (buf, machomagic[i], sizeof (machomagic[i])) == 0)
2388 /* Generic version to scan the name list of the loaded program for
2389 the symbols g++ uses for static constructors and destructors. */
2392 scan_prog_file (const char *prog_name, scanpass which_pass,
2395 void (*int_handler) (int);
2397 void (*quit_handler) (int);
2399 char *real_nm_argv[4];
2400 const char **nm_argv = CONST_CAST2 (const char **, char**, real_nm_argv);
2402 struct pex_obj *pex;
2409 if (which_pass == PASS_SECOND)
2412 /* LTO objects must be in a known format. This check prevents
2413 us from accepting an archive containing LTO objects, which
2414 gcc cannot currently handle. */
2415 if (which_pass == PASS_LTOINFO && !maybe_lto_object_file (prog_name))
2418 /* If we do not have an `nm', complain. */
2419 if (nm_file_name == 0)
2420 fatal_error ("cannot find 'nm'");
2422 nm_argv[argc++] = nm_file_name;
2423 if (NM_FLAGS[0] != '\0')
2424 nm_argv[argc++] = NM_FLAGS;
2426 nm_argv[argc++] = prog_name;
2427 nm_argv[argc++] = (char *) 0;
2429 /* Trace if needed. */
2432 const char **p_argv;
2435 for (p_argv = &nm_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
2436 fprintf (stderr, " %s", str);
2438 fprintf (stderr, "\n");
2444 pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
2446 fatal_error ("pex_init failed: %m");
2448 errmsg = pex_run (pex, 0, nm_file_name, real_nm_argv, NULL, HOST_BIT_BUCKET,
2455 fatal_error ("%s: %m", _(errmsg));
2458 fatal_error (errmsg);
2461 int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
2463 quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
2466 inf = pex_read_output (pex, 0);
2468 fatal_error ("can't open nm output: %m");
2472 if (which_pass == PASS_LTOINFO)
2473 fprintf (stderr, "\nnm output with LTO info marker symbol.\n");
2475 fprintf (stderr, "\nnm output with constructors/destructors.\n");
2478 /* Read each line of nm output. */
2479 while (fgets (buf, sizeof buf, inf) != (char *) 0)
2485 fprintf (stderr, "\t%s\n", buf);
2487 if (which_pass == PASS_LTOINFO)
2492 /* Look for the LTO info marker symbol, and add filename to
2493 the LTO objects list if found. */
2494 for (p = buf; (ch = *p) != '\0' && ch != '\n'; p++)
2495 if (ch == ' ' && p[1] == '_' && p[2] == '_'
2496 && (strncmp (p + (p[3] == '_' ? 2 : 1), "__gnu_lto_v1", 12) == 0)
2497 && ISSPACE (p[p[3] == '_' ? 14 : 13]))
2499 add_lto_object (<o_objects, prog_name);
2501 /* We need to read all the input, so we can't just
2502 return here. But we can avoid useless work. */
2511 /* If it contains a constructor or destructor name, add the name
2512 to the appropriate list unless this is a kind of symbol we're
2513 not supposed to even consider. */
2515 for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++)
2516 if (ch == ' ' && p[1] == 'U' && p[2] == ' ')
2523 /* Find the end of the symbol name.
2524 Do not include `|', because Encore nm can tack that on the end. */
2525 for (end = p; (ch2 = *end) != '\0' && !ISSPACE (ch2) && ch2 != '|';
2531 switch (is_ctor_dtor (name))
2534 if (! (filter & SCAN_CTOR))
2536 if (which_pass != PASS_LIB)
2537 add_to_list (&constructors, name);
2541 if (! (filter & SCAN_DTOR))
2543 if (which_pass != PASS_LIB)
2544 add_to_list (&destructors, name);
2548 if (! (filter & SCAN_INIT))
2550 if (which_pass != PASS_LIB)
2551 fatal_error ("init function found in object %s", prog_name);
2552 #ifndef LD_INIT_SWITCH
2553 add_to_list (&constructors, name);
2558 if (! (filter & SCAN_FINI))
2560 if (which_pass != PASS_LIB)
2561 fatal_error ("fini function found in object %s", prog_name);
2562 #ifndef LD_FINI_SWITCH
2563 add_to_list (&destructors, name);
2568 if (! (filter & SCAN_DWEH))
2570 if (which_pass != PASS_LIB)
2571 add_to_list (&frame_tables, name);
2574 default: /* not a constructor or destructor */
2580 fprintf (stderr, "\n");
2582 do_wait (nm_file_name, pex);
2584 signal (SIGINT, int_handler);
2586 signal (SIGQUIT, quit_handler);
2592 /* Use the List Dynamic Dependencies program to find shared libraries that
2593 the output file depends upon and their initialization/finalization
2594 routines, if any. */
2597 scan_libraries (const char *prog_name)
2599 static struct head libraries; /* list of shared libraries found */
2601 void (*int_handler) (int);
2603 void (*quit_handler) (int);
2605 char *real_ldd_argv[4];
2606 const char **ldd_argv = CONST_CAST2 (const char **, char **, real_ldd_argv);
2608 struct pex_obj *pex;
2614 /* If we do not have an `ldd', complain. */
2615 if (ldd_file_name == 0)
2617 error ("cannot find 'ldd'");
2621 ldd_argv[argc++] = ldd_file_name;
2622 ldd_argv[argc++] = prog_name;
2623 ldd_argv[argc++] = (char *) 0;
2625 /* Trace if needed. */
2628 const char **p_argv;
2631 for (p_argv = &ldd_argv[0]; (str = *p_argv) != (char *) 0; p_argv++)
2632 fprintf (stderr, " %s", str);
2634 fprintf (stderr, "\n");
2640 pex = pex_init (PEX_USE_PIPES, "collect2", NULL);
2642 fatal_error ("pex_init failed: %m");
2644 errmsg = pex_run (pex, 0, ldd_file_name, real_ldd_argv, NULL, NULL, &err);
2650 fatal_error ("%s: %m", _(errmsg));
2653 fatal_error (errmsg);
2656 int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN);
2658 quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN);
2661 inf = pex_read_output (pex, 0);
2663 fatal_error ("can't open ldd output: %m");
2666 notice ("\nldd output with constructors/destructors.\n");
2668 /* Read each line of ldd output. */
2669 while (fgets (buf, sizeof buf, inf) != (char *) 0)
2672 char *name, *end, *p = buf;
2674 /* Extract names of libraries and add to list. */
2675 PARSE_LDD_OUTPUT (p);
2680 if (strncmp (name, "not found", sizeof ("not found") - 1) == 0)
2681 fatal_error ("dynamic dependency %s not found", buf);
2683 /* Find the end of the symbol name. */
2685 (ch2 = *end) != '\0' && ch2 != '\n' && !ISSPACE (ch2) && ch2 != '|';
2690 if (access (name, R_OK) == 0)
2691 add_to_list (&libraries, name);
2693 fatal_error ("unable to open dynamic dependency '%s'", buf);
2696 fprintf (stderr, "\t%s\n", buf);
2699 fprintf (stderr, "\n");
2701 do_wait (ldd_file_name, pex);
2703 signal (SIGINT, int_handler);
2705 signal (SIGQUIT, quit_handler);
2708 /* Now iterate through the library list adding their symbols to
2710 for (list = libraries.first; list; list = list->next)
2711 scan_prog_file (list->name, PASS_LIB, SCAN_ALL);
2714 #endif /* LDD_SUFFIX */
2716 #endif /* OBJECT_FORMAT_NONE */
2720 * COFF specific stuff.
2723 #ifdef OBJECT_FORMAT_COFF
2725 #if defined (EXTENDED_COFF)
2727 # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax)
2728 # define GCC_SYMENT SYMR
2729 # define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal)
2730 # define GCC_SYMINC(X) (1)
2731 # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax)
2732 # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0)
2736 # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms)
2737 # define GCC_SYMENT SYMENT
2738 # if defined (C_WEAKEXT)
2739 # define GCC_OK_SYMBOL(X) \
2740 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2741 ((X).n_scnum > N_UNDEF) && \
2743 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2744 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2745 # define GCC_UNDEF_SYMBOL(X) \
2746 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2747 ((X).n_scnum == N_UNDEF))
2749 # define GCC_OK_SYMBOL(X) \
2750 (((X).n_sclass == C_EXT) && \
2751 ((X).n_scnum > N_UNDEF) && \
2753 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2754 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2755 # define GCC_UNDEF_SYMBOL(X) \
2756 (((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF))
2758 # define GCC_SYMINC(X) ((X).n_numaux+1)
2759 # define GCC_SYMZERO(X) 0
2761 /* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */
2762 #if TARGET_AIX_VERSION >= 51
2763 # define GCC_CHECK_HDR(X) \
2764 (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2765 || (HEADER (X).f_magic == 0767 && aix64_flag)) \
2766 && !(HEADER (X).f_flags & F_LOADONLY))
2768 # define GCC_CHECK_HDR(X) \
2769 (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2770 || (HEADER (X).f_magic == 0757 && aix64_flag)) \
2771 && !(HEADER (X).f_flags & F_LOADONLY))
2776 #ifdef COLLECT_EXPORT_LIST
2777 /* Array of standard AIX libraries which should not
2778 be scanned for ctors/dtors. */
2779 static const char *const aix_std_libs[] = {
2787 "/usr/lib/libc_r.a",
2788 "/usr/lib/libm_r.a",
2789 "/usr/lib/threads/libc.a",
2790 "/usr/ccs/lib/libc.a",
2791 "/usr/ccs/lib/libm.a",
2792 "/usr/ccs/lib/libc_r.a",
2793 "/usr/ccs/lib/libm_r.a",
2797 /* This function checks the filename and returns 1
2798 if this name matches the location of a standard AIX library. */
2799 static int ignore_library (const char *);
2801 ignore_library (const char *name)
2803 const char *const *p;
2806 if (target_system_root[0] != '\0')
2808 length = strlen (target_system_root);
2809 if (strncmp (name, target_system_root, length) != 0)
2813 for (p = &aix_std_libs[0]; *p != NULL; ++p)
2814 if (strcmp (name, *p) == 0)
2818 #endif /* COLLECT_EXPORT_LIST */
2820 #if defined (HAVE_DECL_LDGETNAME) && !HAVE_DECL_LDGETNAME
2821 extern char *ldgetname (LDFILE *, GCC_SYMENT *);
2824 /* COFF version to scan the name list of the loaded program for
2825 the symbols g++ uses for static constructors and destructors. */
2828 scan_prog_file (const char *prog_name, scanpass which_pass,
2831 LDFILE *ldptr = NULL;
2832 int sym_index, sym_count;
2835 if (which_pass != PASS_FIRST && which_pass != PASS_OBJ)
2838 #ifdef COLLECT_EXPORT_LIST
2839 /* We do not need scanning for some standard C libraries. */
2840 if (which_pass == PASS_FIRST && ignore_library (prog_name))
2843 /* On AIX we have a loop, because there is not much difference
2844 between an object and an archive. This trick allows us to
2845 eliminate scan_libraries() function. */
2849 /* Some platforms (e.g. OSF4) declare ldopen as taking a
2850 non-const char * filename parameter, even though it will not
2851 modify that string. So we must cast away const-ness here,
2852 using CONST_CAST to prevent complaints from -Wcast-qual. */
2853 if ((ldptr = ldopen (CONST_CAST (char *, prog_name), ldptr)) != NULL)
2855 if (! MY_ISCOFF (HEADER (ldptr).f_magic))
2856 fatal_error ("%s: not a COFF file", prog_name);
2858 if (GCC_CHECK_HDR (ldptr))
2860 sym_count = GCC_SYMBOLS (ldptr);
2861 sym_index = GCC_SYMZERO (ldptr);
2863 #ifdef COLLECT_EXPORT_LIST
2864 /* Is current archive member a shared object? */
2865 is_shared = HEADER (ldptr).f_flags & F_SHROBJ;
2868 while (sym_index < sym_count)
2872 if (ldtbread (ldptr, sym_index, &symbol) <= 0)
2874 sym_index += GCC_SYMINC (symbol);
2876 if (GCC_OK_SYMBOL (symbol))
2880 if ((name = ldgetname (ldptr, &symbol)) == NULL)
2881 continue; /* Should never happen. */
2883 #ifdef XCOFF_DEBUGGING_INFO
2884 /* All AIX function names have a duplicate entry
2885 beginning with a dot. */
2890 switch (is_ctor_dtor (name))
2893 if (! (filter & SCAN_CTOR))
2896 add_to_list (&constructors, name);
2897 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
2898 if (which_pass == PASS_OBJ)
2899 add_to_list (&exports, name);
2904 if (! (filter & SCAN_DTOR))
2907 add_to_list (&destructors, name);
2908 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
2909 if (which_pass == PASS_OBJ)
2910 add_to_list (&exports, name);
2914 #ifdef COLLECT_EXPORT_LIST
2916 if (! (filter & SCAN_INIT))
2918 #ifndef LD_INIT_SWITCH
2920 add_to_list (&constructors, name);
2925 if (! (filter & SCAN_FINI))
2927 #ifndef LD_INIT_SWITCH
2929 add_to_list (&destructors, name);
2935 if (! (filter & SCAN_DWEH))
2938 add_to_list (&frame_tables, name);
2939 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
2940 if (which_pass == PASS_OBJ)
2941 add_to_list (&exports, name);
2945 default: /* not a constructor or destructor */
2946 #ifdef COLLECT_EXPORT_LIST
2947 /* Explicitly export all global symbols when
2948 building a shared object on AIX, but do not
2949 re-export symbols from another shared object
2950 and do not export symbols if the user
2951 provides an explicit export list. */
2952 if (shared_obj && !is_shared
2953 && which_pass == PASS_OBJ && !export_flag)
2954 add_to_list (&exports, name);
2960 #if !defined(EXTENDED_COFF)
2961 fprintf (stderr, "\tsec=%d class=%d type=%s%o %s\n",
2962 symbol.n_scnum, symbol.n_sclass,
2963 (symbol.n_type ? "0" : ""), symbol.n_type,
2967 "\tiss = %5d, value = %5ld, index = %5d, name = %s\n",
2968 symbol.iss, (long) symbol.value, symbol.index, name);
2973 #ifdef COLLECT_EXPORT_LIST
2976 /* If archive contains both 32-bit and 64-bit objects,
2977 we want to skip objects in other mode so mismatch normal. */
2979 fprintf (stderr, "%s : magic=%o aix64=%d mismatch\n",
2980 prog_name, HEADER (ldptr).f_magic, aix64_flag);
2986 fatal_error ("%s: cannot open as COFF file", prog_name);
2988 #ifdef COLLECT_EXPORT_LIST
2989 /* On AIX loop continues while there are more members in archive. */
2991 while (ldclose (ldptr) == FAILURE);
2993 /* Otherwise we simply close ldptr. */
2994 (void) ldclose(ldptr);
2997 #endif /* OBJECT_FORMAT_COFF */
2999 #ifdef COLLECT_EXPORT_LIST
3000 /* Given a library name without "lib" prefix, this function
3001 returns a full library name including a path. */
3003 resolve_lib_name (const char *name)
3007 /* Library extensions for AIX dynamic linking. */
3008 const char * const libexts[2] = {"a", "so"};
3010 for (i = 0; libpaths[i]; i++)
3011 if (libpaths[i]->max_len > l)
3012 l = libpaths[i]->max_len;
3014 lib_buf = XNEWVEC (char, l + strlen(name) + 10);
3016 for (i = 0; libpaths[i]; i++)
3018 struct prefix_list *list = libpaths[i]->plist;
3019 for (; list; list = list->next)
3021 /* The following lines are needed because path_prefix list
3022 may contain directories both with trailing DIR_SEPARATOR and
3025 if (!IS_DIR_SEPARATOR (list->prefix[strlen(list->prefix)-1]))
3027 for (j = 0; j < 2; j++)
3029 sprintf (lib_buf, "%s%slib%s.%s",
3030 list->prefix, p, name,
3031 libexts[(j + aixrtl_flag) % 2]);
3032 if (debug) fprintf (stderr, "searching for: %s\n", lib_buf);
3033 if (file_exists (lib_buf))
3035 if (debug) fprintf (stderr, "found: %s\n", lib_buf);
3042 fprintf (stderr, "not found\n");
3044 fatal_error ("library lib%s not found", name);
3047 #endif /* COLLECT_EXPORT_LIST */
3049 #ifdef COLLECT_RUN_DSYMUTIL
3050 static int flag_dsym = false;
3051 static int flag_idsym = false;
3054 process_args (int *argcp, char **argv) {
3057 for (i=0; i<argc; ++i)
3059 if (strcmp (argv[i], "-dsym") == 0)
3062 /* Remove the flag, as we handle all processing for it. */
3065 argv[j] = argv[j+1];
3070 else if (strcmp (argv[i], "-idsym") == 0)
3073 /* Remove the flag, as we handle all processing for it. */
3076 argv[j] = argv[j+1];
3085 do_dsymutil (const char *output_file) {
3086 const char *dsymutil = DSYMUTIL + 1;
3087 struct pex_obj *pex;
3088 char **real_argv = XCNEWVEC (char *, 3);
3089 const char ** argv = CONST_CAST2 (const char **, char **,
3093 argv[1] = output_file;
3094 argv[2] = (char *) 0;
3096 pex = collect_execute (dsymutil, real_argv, NULL, NULL, PEX_LAST | PEX_SEARCH);
3097 do_wait (dsymutil, pex);
3101 post_ld_pass (bool temp_file) {
3102 if (!(temp_file && flag_idsym) && !flag_dsym)
3105 do_dsymutil (output_file);
3109 process_args (int *argcp ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) { }
3110 static void post_ld_pass (bool temp_file ATTRIBUTE_UNUSED) { }