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, 2005, 2007, 2008, 2009
5 Free Software Foundation, Inc.
6 Contributed by Chris Smith (csmith@convex.com).
7 Heavily modified by Michael Meissner (meissner@cygnus.com),
8 Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com).
10 This file is part of GCC.
12 GCC is free software; you can redistribute it and/or modify it under
13 the terms of the GNU General Public License as published by the Free
14 Software Foundation; either version 3, or (at your option) any later
17 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
18 WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 You should have received a copy of the GNU General Public License
23 along with GCC; see the file COPYING3. If not see
24 <http://www.gnu.org/licenses/>. */
27 /* Build tables of static constructors and destructors and run ld. */
31 #include "coretypes.h"
34 #if ! defined( SIGCHLD ) && defined( SIGCLD )
35 # define SIGCHLD SIGCLD
38 #ifndef LIBRARY_PATH_ENV
39 #define LIBRARY_PATH_ENV "LIBRARY_PATH"
45 #include "collect2-aix.h"
51 /* On certain systems, we have code that works by scanning the object file
52 directly. But this code uses system-specific header files and library
53 functions, so turn it off in a cross-compiler. Likewise, the names of
54 the utilities are not correct for a cross-compiler; we have to hope that
55 cross-versions are in the proper directories. */
57 #ifdef CROSS_DIRECTORY_STRUCTURE
58 #ifndef CROSS_AIX_SUPPORT
59 #undef OBJECT_FORMAT_COFF
62 #undef REAL_LD_FILE_NAME
63 #undef REAL_NM_FILE_NAME
64 #undef REAL_STRIP_FILE_NAME
67 /* If we cannot use a special method, use the ordinary one:
68 run nm to find what symbols are present.
69 In a cross-compiler, this means you need a cross nm,
70 but that is not quite as unpleasant as special headers. */
72 #if !defined (OBJECT_FORMAT_COFF)
73 #define OBJECT_FORMAT_NONE
76 #ifdef OBJECT_FORMAT_COFF
78 #ifndef CROSS_DIRECTORY_STRUCTURE
86 /* Many versions of ldfcn.h define these. */
95 /* Some systems have an ISCOFF macro, but others do not. In some cases
96 the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines
97 that either do not have an ISCOFF macro in /usr/include or for those
101 #define MY_ISCOFF(X) ISCOFF (X)
104 #endif /* OBJECT_FORMAT_COFF */
106 #ifdef OBJECT_FORMAT_NONE
108 /* Default flags to pass to nm. */
110 #define NM_FLAGS "-n"
113 #endif /* OBJECT_FORMAT_NONE */
115 /* Some systems use __main in a way incompatible with its use in gcc, in these
116 cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
117 give the same symbol without quotes for an alternative entry point. */
119 #define NAME__MAIN "__main"
122 /* This must match tree.h. */
123 #define DEFAULT_INIT_PRIORITY 65535
125 #ifndef COLLECT_SHARED_INIT_FUNC
126 #define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
127 fprintf ((STREAM), "void _GLOBAL__DI() {\n\t%s();\n}\n", (FUNC))
129 #ifndef COLLECT_SHARED_FINI_FUNC
130 #define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
131 fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC))
135 #define SCAN_LIBRARIES
139 #define SHLIB_SUFFIX ".so"
143 int do_collecting
= 1;
145 int do_collecting
= 0;
148 /* Cook up an always defined indication of whether we proceed the
149 "EXPORT_LIST" way. */
151 #ifdef COLLECT_EXPORT_LIST
152 #define DO_COLLECT_EXPORT_LIST 1
154 #define DO_COLLECT_EXPORT_LIST 0
157 /* Nonzero if we should suppress the automatic demangling of identifiers
158 in linker error messages. Set from COLLECT_NO_DEMANGLE. */
161 /* Linked lists of constructor and destructor names. */
177 int vflag
; /* true if -v */
178 static int rflag
; /* true if -r */
179 static int strip_flag
; /* true if -s */
180 static const char *demangle_flag
;
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 int debug
; /* true if -debug */
198 static int shared_obj
; /* true if -shared */
200 static const char *c_file
; /* <xxx>.c for constructor/destructor list. */
201 static const char *o_file
; /* <xxx>.o for constructor/destructor list. */
202 #ifdef COLLECT_EXPORT_LIST
203 static const char *export_file
; /* <xxx>.x for AIX export list. */
205 static char **lto_o_files
; /* Output files for LTO. */
206 const char *ldout
; /* File for ld stdout. */
207 const char *lderrout
; /* File for ld stderr. */
208 static const char *output_file
; /* Output file for ld. */
209 static const char *nm_file_name
; /* pathname of nm */
211 static const char *ldd_file_name
; /* pathname of ldd (or equivalent) */
213 static const char *strip_file_name
; /* pathname of strip */
214 const char *c_file_name
; /* pathname of gcc */
215 static char *initname
, *fininame
; /* names of init and fini funcs */
217 static struct head constructors
; /* list of constructors found */
218 static struct head destructors
; /* list of destructors found */
219 #ifdef COLLECT_EXPORT_LIST
220 static struct head exports
; /* list of exported symbols */
222 static struct head frame_tables
; /* list of frame unwind info tables */
224 static bool at_file_supplied
; /* Whether to use @file arguments */
225 static char *response_file
; /* Name of any current response file */
227 struct obstack temporary_obstack
;
228 char * temporary_firstobj
;
230 /* A string that must be prepended to a target OS path in order to find
231 it on the host system. */
232 #ifdef TARGET_SYSTEM_ROOT
233 static const char *target_system_root
= TARGET_SYSTEM_ROOT
;
235 static const char *target_system_root
= "";
238 /* Structure to hold all the directories in which to search for files to
243 const char *prefix
; /* String to prepend to the path. */
244 struct prefix_list
*next
; /* Next in linked list. */
249 struct prefix_list
*plist
; /* List of prefixes to try */
250 int max_len
; /* Max length of a prefix in PLIST */
251 const char *name
; /* Name of this list (used in config stuff) */
254 #ifdef COLLECT_EXPORT_LIST
255 /* Lists to keep libraries to be scanned for global constructors/destructors. */
256 static struct head libs
; /* list of libraries */
257 static struct path_prefix cmdline_lib_dirs
; /* directories specified with -L */
258 static struct path_prefix libpath_lib_dirs
; /* directories in LIBPATH */
259 static struct path_prefix
*libpaths
[3] = {&cmdline_lib_dirs
,
260 &libpath_lib_dirs
, NULL
};
263 /* List of names of object files containing LTO information.
264 These are a subset of the object file names appearing on the
265 command line, and must be identical, in the sense of pointer
266 equality, with the names passed to maybe_run_lto_and_relink(). */
270 const char *name
; /* Name of object file. */
271 struct lto_object
*next
; /* Next in linked list. */
274 struct lto_object_list
276 struct lto_object
*first
; /* First list element. */
277 struct lto_object
*last
; /* Last list element. */
280 static struct lto_object_list lto_objects
;
282 /* Special kinds of symbols that a name may denote. */
285 SYM_REGULAR
= 0, /* nothing special */
287 SYM_CTOR
= 1, /* constructor */
288 SYM_DTOR
= 2, /* destructor */
289 SYM_INIT
= 3, /* shared object routine that calls all the ctors */
290 SYM_FINI
= 4, /* shared object routine that calls all the dtors */
291 SYM_DWEH
= 5 /* DWARF exception handling table */
294 static symkind
is_ctor_dtor (const char *);
296 static void handler (int);
297 static char *find_a_file (struct path_prefix
*, const char *);
298 static void add_prefix (struct path_prefix
*, const char *);
299 static void prefix_from_env (const char *, struct path_prefix
*);
300 static void prefix_from_string (const char *, struct path_prefix
*);
301 static void do_wait (const char *, struct pex_obj
*);
302 static void fork_execute (const char *, char **);
303 static void maybe_unlink (const char *);
304 static void maybe_unlink_list (char **);
305 static void add_to_list (struct head
*, const char *);
306 static int extract_init_priority (const char *);
307 static void sort_ids (struct head
*);
308 static void write_list (FILE *, const char *, struct id
*);
309 #ifdef COLLECT_EXPORT_LIST
310 static void dump_list (FILE *, const char *, struct id
*);
313 static void dump_prefix_list (FILE *, const char *, struct prefix_list
*);
315 static void write_list_with_asm (FILE *, const char *, struct id
*);
316 static void write_c_file (FILE *, const char *);
317 static void write_c_file_stat (FILE *, const char *);
318 #ifndef LD_INIT_SWITCH
319 static void write_c_file_glob (FILE *, const char *);
321 #ifdef SCAN_LIBRARIES
322 static void scan_libraries (const char *);
324 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
325 static int is_in_args (const char *, const char **, const char **);
327 #ifdef COLLECT_EXPORT_LIST
329 static int is_in_list (const char *, struct id
*);
331 static void write_aix_file (FILE *, struct id
*);
332 static char *resolve_lib_name (const char *);
334 static char *extract_string (const char **);
336 /* Enumerations describing which pass this is for scanning the
340 PASS_FIRST
, /* without constructors */
341 PASS_OBJ
, /* individual objects */
342 PASS_LIB
, /* looking for shared libraries */
343 PASS_SECOND
, /* with constructors linked in */
344 PASS_LTOINFO
/* looking for objects with LTO info */
347 /* ... and which kinds of symbols are to be considered. */
349 enum scanfilter_masks
{
352 SCAN_CTOR
= 1 << SYM_CTOR
,
353 SCAN_DTOR
= 1 << SYM_DTOR
,
354 SCAN_INIT
= 1 << SYM_INIT
,
355 SCAN_FINI
= 1 << SYM_FINI
,
356 SCAN_DWEH
= 1 << SYM_DWEH
,
360 /* This type is used for parameters and variables which hold
361 combinations of the flags in enum scanfilter_masks. */
362 typedef int scanfilter
;
364 /* Scan the name list of the loaded program for the symbols g++ uses for
365 static constructors and destructors.
367 The SCANPASS argument tells which collect processing pass this is for and
368 the SCANFILTER argument tells which kinds of symbols to consider in this
369 pass. Symbols of a special kind not in the filter mask are considered as
372 The constructor table begins at __CTOR_LIST__ and contains a count of the
373 number of pointers (or -1 if the constructors are built in a separate
374 section by the linker), followed by the pointers to the constructor
375 functions, terminated with a null pointer. The destructor table has the
376 same format, and begins at __DTOR_LIST__. */
378 static void scan_prog_file (const char *, scanpass
, scanfilter
);
381 /* Delete tempfiles and exit function. */
384 collect_exit (int status
)
386 if (c_file
!= 0 && c_file
[0])
387 maybe_unlink (c_file
);
389 if (o_file
!= 0 && o_file
[0])
390 maybe_unlink (o_file
);
392 #ifdef COLLECT_EXPORT_LIST
393 if (export_file
!= 0 && export_file
[0])
394 maybe_unlink (export_file
);
398 maybe_unlink_list (lto_o_files
);
400 if (ldout
!= 0 && ldout
[0])
402 dump_file (ldout
, stdout
);
403 maybe_unlink (ldout
);
406 if (lderrout
!= 0 && lderrout
[0])
408 dump_file (lderrout
, stderr
);
409 maybe_unlink (lderrout
);
412 if (status
!= 0 && output_file
!= 0 && output_file
[0])
413 maybe_unlink (output_file
);
416 maybe_unlink (response_file
);
422 /* Notify user of a non-error. */
424 notice (const char *cmsgid
, ...)
428 va_start (ap
, cmsgid
);
429 vfprintf (stderr
, _(cmsgid
), ap
);
433 /* Die when sys call fails. */
436 fatal_perror (const char * cmsgid
, ...)
441 va_start (ap
, cmsgid
);
442 fprintf (stderr
, "collect2: ");
443 vfprintf (stderr
, _(cmsgid
), ap
);
444 fprintf (stderr
, ": %s\n", xstrerror (e
));
447 collect_exit (FATAL_EXIT_CODE
);
453 fatal (const char * cmsgid
, ...)
457 va_start (ap
, cmsgid
);
458 fprintf (stderr
, "collect2: ");
459 vfprintf (stderr
, _(cmsgid
), ap
);
460 fprintf (stderr
, "\n");
463 collect_exit (FATAL_EXIT_CODE
);
466 /* Write error message. */
469 error (const char * gmsgid
, ...)
473 va_start (ap
, gmsgid
);
474 fprintf (stderr
, "collect2: ");
475 vfprintf (stderr
, _(gmsgid
), ap
);
476 fprintf (stderr
, "\n");
480 /* In case obstack is linked in, and abort is defined to fancy_abort,
481 provide a default entry. */
484 fancy_abort (const char *file
, int line
, const char *func
)
486 fatal ("internal gcc abort in %s, at %s:%d", func
, file
, line
);
492 if (c_file
!= 0 && c_file
[0])
493 maybe_unlink (c_file
);
495 if (o_file
!= 0 && o_file
[0])
496 maybe_unlink (o_file
);
498 if (ldout
!= 0 && ldout
[0])
499 maybe_unlink (ldout
);
501 if (lderrout
!= 0 && lderrout
[0])
502 maybe_unlink (lderrout
);
504 #ifdef COLLECT_EXPORT_LIST
505 if (export_file
!= 0 && export_file
[0])
506 maybe_unlink (export_file
);
510 maybe_unlink_list (lto_o_files
);
513 maybe_unlink (response_file
);
515 signal (signo
, SIG_DFL
);
521 file_exists (const char *name
)
523 return access (name
, R_OK
) == 0;
526 /* Parse a reasonable subset of shell quoting syntax. */
529 extract_string (const char **pp
)
542 obstack_1grow (&temporary_obstack
, c
);
543 else if (! inside
&& c
== ' ')
545 else if (! inside
&& c
== '\\')
550 obstack_1grow (&temporary_obstack
, c
);
553 obstack_1grow (&temporary_obstack
, '\0');
555 return XOBFINISH (&temporary_obstack
, char *);
559 dump_file (const char *name
, FILE *to
)
561 FILE *stream
= fopen (name
, "r");
568 while (c
= getc (stream
),
569 c
!= EOF
&& (ISIDNUM (c
) || c
== '$' || c
== '.'))
570 obstack_1grow (&temporary_obstack
, c
);
571 if (obstack_object_size (&temporary_obstack
) > 0)
573 const char *word
, *p
;
575 obstack_1grow (&temporary_obstack
, '\0');
576 word
= XOBFINISH (&temporary_obstack
, const char *);
579 ++word
, putc ('.', to
);
581 if (!strncmp (p
, USER_LABEL_PREFIX
, strlen (USER_LABEL_PREFIX
)))
582 p
+= strlen (USER_LABEL_PREFIX
);
584 #ifdef HAVE_LD_DEMANGLE
590 result
= cplus_demangle (p
, DMGL_PARAMS
| DMGL_ANSI
| DMGL_VERBOSE
);
598 diff
= strlen (word
) - strlen (result
);
599 while (diff
> 0 && c
== ' ')
600 --diff
, putc (' ', to
);
601 if (diff
< 0 && c
== ' ')
603 while (diff
< 0 && c
== ' ')
604 ++diff
, c
= getc (stream
);
607 /* Make sure we output at least one space, or
608 the demangled symbol name will run into
609 whatever text follows. */
620 obstack_free (&temporary_obstack
, temporary_firstobj
);
629 /* Return the kind of symbol denoted by name S. */
632 is_ctor_dtor (const char *s
)
634 struct names
{ const char *const name
; const int len
; symkind ret
;
635 const int two_underscores
; };
637 const struct names
*p
;
639 const char *orig_s
= s
;
641 static const struct names special
[] = {
642 #ifndef NO_DOLLAR_IN_LABEL
643 { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, SYM_CTOR
, 0 },
644 { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, SYM_DTOR
, 0 },
646 #ifndef NO_DOT_IN_LABEL
647 { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, SYM_CTOR
, 0 },
648 { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, SYM_DTOR
, 0 },
649 #endif /* NO_DOT_IN_LABEL */
650 #endif /* NO_DOLLAR_IN_LABEL */
651 { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, SYM_CTOR
, 0 },
652 { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, SYM_DTOR
, 0 },
653 { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, SYM_DWEH
, 0 },
654 { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, SYM_INIT
, 0 },
655 { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, SYM_FINI
, 0 },
656 { NULL
, 0, SYM_REGULAR
, 0 }
659 while ((ch
= *s
) == '_')
665 for (p
= &special
[0]; p
->len
> 0; p
++)
668 && (!p
->two_underscores
|| ((s
- orig_s
) >= 2))
669 && strncmp(s
, p
->name
, p
->len
) == 0)
677 /* We maintain two prefix lists: one from COMPILER_PATH environment variable
678 and one from the PATH variable. */
680 static struct path_prefix cpath
, path
;
682 #ifdef CROSS_DIRECTORY_STRUCTURE
683 /* This is the name of the target machine. We use it to form the name
684 of the files to execute. */
686 static const char *const target_machine
= TARGET_MACHINE
;
689 /* Search for NAME using prefix list PPREFIX. We only look for executable
692 Return 0 if not found, otherwise return its name, allocated with malloc. */
695 find_a_file (struct path_prefix
*pprefix
, const char *name
)
698 struct prefix_list
*pl
;
699 int len
= pprefix
->max_len
+ strlen (name
) + 1;
702 fprintf (stderr
, "Looking for '%s'\n", name
);
704 #ifdef HOST_EXECUTABLE_SUFFIX
705 len
+= strlen (HOST_EXECUTABLE_SUFFIX
);
708 temp
= XNEWVEC (char, len
);
710 /* Determine the filename to execute (special case for absolute paths). */
712 if (IS_ABSOLUTE_PATH (name
))
714 if (access (name
, X_OK
) == 0)
719 fprintf (stderr
, " - found: absolute path\n");
724 #ifdef HOST_EXECUTABLE_SUFFIX
725 /* Some systems have a suffix for executable files.
726 So try appending that. */
728 strcat (temp
, HOST_EXECUTABLE_SUFFIX
);
730 if (access (temp
, X_OK
) == 0)
735 fprintf (stderr
, " - failed to locate using absolute path\n");
738 for (pl
= pprefix
->plist
; pl
; pl
= pl
->next
)
742 strcpy (temp
, pl
->prefix
);
745 if (stat (temp
, &st
) >= 0
746 && ! S_ISDIR (st
.st_mode
)
747 && access (temp
, X_OK
) == 0)
750 #ifdef HOST_EXECUTABLE_SUFFIX
751 /* Some systems have a suffix for executable files.
752 So try appending that. */
753 strcat (temp
, HOST_EXECUTABLE_SUFFIX
);
755 if (stat (temp
, &st
) >= 0
756 && ! S_ISDIR (st
.st_mode
)
757 && access (temp
, X_OK
) == 0)
762 if (debug
&& pprefix
->plist
== NULL
)
763 fprintf (stderr
, " - failed: no entries in prefix list\n");
769 /* Add an entry for PREFIX to prefix list PPREFIX. */
772 add_prefix (struct path_prefix
*pprefix
, const char *prefix
)
774 struct prefix_list
*pl
, **prev
;
779 for (pl
= pprefix
->plist
; pl
->next
; pl
= pl
->next
)
784 prev
= &pprefix
->plist
;
786 /* Keep track of the longest prefix. */
788 len
= strlen (prefix
);
789 if (len
> pprefix
->max_len
)
790 pprefix
->max_len
= len
;
792 pl
= XNEW (struct prefix_list
);
793 pl
->prefix
= xstrdup (prefix
);
798 pl
->next
= (struct prefix_list
*) 0;
802 /* Take the value of the environment variable ENV, break it into a path, and
803 add of the entries to PPREFIX. */
806 prefix_from_env (const char *env
, struct path_prefix
*pprefix
)
809 GET_ENVIRONMENT (p
, env
);
812 prefix_from_string (p
, pprefix
);
816 prefix_from_string (const char *p
, struct path_prefix
*pprefix
)
818 const char *startp
, *endp
;
819 char *nstore
= XNEWVEC (char, strlen (p
) + 3);
822 fprintf (stderr
, "Convert string '%s' into prefixes, separator = '%c'\n", p
, PATH_SEPARATOR
);
827 if (*endp
== PATH_SEPARATOR
|| *endp
== 0)
829 strncpy (nstore
, startp
, endp
-startp
);
832 strcpy (nstore
, "./");
834 else if (! IS_DIR_SEPARATOR (endp
[-1]))
836 nstore
[endp
-startp
] = DIR_SEPARATOR
;
837 nstore
[endp
-startp
+1] = 0;
840 nstore
[endp
-startp
] = 0;
843 fprintf (stderr
, " - add prefix: %s\n", nstore
);
845 add_prefix (pprefix
, nstore
);
848 endp
= startp
= endp
+ 1;
856 /* Add an entry for the object file NAME to object file list LIST.
857 New entries are added at the end of the list. The original pointer
858 value of NAME is preserved, i.e., no string copy is performed. */
861 add_lto_object (struct lto_object_list
*list
, const char *name
)
863 struct lto_object
*n
= XNEW (struct lto_object
);
868 list
->last
->next
= n
;
876 /* Perform a link-time recompilation and relink if any of the object
877 files contain LTO info. The linker command line LTO_LD_ARGV
878 represents the linker command that would produce a final executable
879 without the use of LTO. OBJECT_LST is a vector of object file names
880 appearing in LTO_LD_ARGV that are to be considerd for link-time
881 recompilation, where OBJECT is a pointer to the last valid element.
882 (This awkward convention avoids an impedance mismatch with the
883 usage of similarly-named variables in main().) The elements of
884 OBJECT_LST must be identical, i.e., pointer equal, to the
885 corresponding arguments in LTO_LD_ARGV.
887 Upon entry, at least one linker run has been performed without the
888 use of any LTO info that might be present. Any recompilations
889 necessary for template instantiations have been performed, and
890 initializer/finalizer tables have been created if needed and
891 included in the linker command line LTO_LD_ARGV. If any of the
892 object files contain LTO info, we run the LTO back end on all such
893 files, and perform the final link with the LTO back end output
894 substituted for the LTO-optimized files. In some cases, a final
895 link with all link-time generated code has already been performed,
896 so there is no need to relink if no LTO info is found. In other
897 cases, our caller has not produced the final executable, and is
898 relying on us to perform the required link whether LTO info is
899 present or not. In that case, the FORCE argument should be true.
900 Note that the linker command line argument LTO_LD_ARGV passed into
901 this function may be modified in place. */
904 maybe_run_lto_and_relink (char **lto_ld_argv
, char **object_lst
,
905 const char **object
, bool force
)
907 const char **object_file
= CONST_CAST2 (const char **, char **, object_lst
);
909 int num_lto_c_args
= 1; /* Allow space for the terminating NULL. */
911 while (object_file
< object
)
913 /* If file contains LTO info, add it to the list of LTO objects. */
914 scan_prog_file (*object_file
++, PASS_LTOINFO
, SCAN_ALL
);
916 /* Increment the argument count by the number of object file arguments
917 we will add. An upper bound suffices, so just count all of the
918 object files regardless of whether they contain LTO info. */
922 if (lto_objects
.first
)
926 const char **lto_c_ptr
;
928 const char **p
, **q
, **r
;
929 const char **lto_o_ptr
;
930 struct lto_object
*list
;
931 char *lto_wrapper
= getenv ("COLLECT_LTO_WRAPPER");
933 const char *prog
= "lto-wrapper";
936 fatal ("COLLECT_LTO_WRAPPER must be set.");
938 /* There is at least one object file containing LTO info,
939 so we need to run the LTO back end and relink. */
941 /* Get compiler options passed down from the parent `gcc' command.
942 These must be passed to the LTO back end. */
943 opts
= getenv ("COLLECT_GCC_OPTIONS");
945 /* Increment the argument count by the number of inherited options.
946 Some arguments may be filtered out later. Again, an upper bound
953 extract_string (&cp
);
956 obstack_free (&temporary_obstack
, temporary_firstobj
);
961 /* Increment the argument count by the number of initial
962 arguments added below. */
965 lto_c_argv
= (char **) xcalloc (sizeof (char *), num_lto_c_args
);
966 lto_c_ptr
= CONST_CAST2 (const char **, char **, lto_c_argv
);
968 *lto_c_ptr
++ = lto_wrapper
;
969 *lto_c_ptr
++ = c_file_name
;
975 const char *s
= extract_string (&cp
);
977 /* Pass the option or argument to the wrapper. */
978 *lto_c_ptr
++ = xstrdup (s
);
980 obstack_free (&temporary_obstack
, temporary_firstobj
);
983 *lto_c_ptr
++ = xstrdup ("-debug");
985 /* Add LTO objects to the wrapper command line. */
986 for (list
= lto_objects
.first
; list
; list
= list
->next
)
987 *lto_c_ptr
++ = list
->name
;
991 /* Save intermediate WPA files in lto1 if debug. */
993 putenv (xstrdup ("WPA_SAVE_LTRANS=1"));
995 /* Run the LTO back end. */
996 pex
= collect_execute (prog
, lto_c_argv
, NULL
, NULL
, PEX_SEARCH
);
1000 size_t i
, num_files
;
1003 stream
= pex_read_output (pex
, 0);
1004 gcc_assert (stream
);
1007 while ((c
= getc (stream
)) != EOF
)
1009 obstack_1grow (&temporary_obstack
, c
);
1014 lto_o_files
= XNEWVEC (char *, num_files
+ 1);
1015 lto_o_files
[num_files
] = NULL
;
1016 start
= XOBFINISH (&temporary_obstack
, char *);
1017 for (i
= 0; i
< num_files
; ++i
)
1020 while (*end
!= '\n')
1024 lto_o_files
[i
] = xstrdup (start
);
1029 obstack_free (&temporary_obstack
, temporary_firstobj
);
1031 do_wait (prog
, pex
);
1034 /* After running the LTO back end, we will relink, substituting
1035 the LTO output for the object files that we submitted to the
1036 LTO. Here, we modify the linker command line for the relink. */
1037 p
= CONST_CAST2 (const char **, char **, lto_ld_argv
);
1038 lto_o_ptr
= CONST_CAST2 (const char **, char **, lto_o_files
);
1042 for (list
= lto_objects
.first
; list
; list
= list
->next
)
1044 if (*p
== list
->name
) /* Note test for pointer equality! */
1046 /* Excise argument from linker command line. */
1049 /* Replace first argument with LTO output file. */
1050 *p
++ = *lto_o_ptr
++;
1054 /* Move following arguments one position earlier,
1055 overwriting the current argument. */
1063 /* No need to continue searching the LTO object list. */
1068 /* If we didn't find a match, move on to the next argument.
1069 Otherwise, P has been set to the correct argument position
1070 at which to continue. */
1074 /* The code above assumes we will never have more lto output files than
1075 input files. Otherwise, we need to resize lto_ld_argv. Check this
1078 fatal ("too many lto output files");
1080 /* Run the linker again, this time replacing the object files
1081 optimized by the LTO with the temporary file generated by the LTO. */
1082 fork_execute ("ld", lto_ld_argv
);
1084 maybe_unlink_list (lto_o_files
);
1088 /* Our caller is relying on us to do the link
1089 even though there is no LTO back end work to be done. */
1090 fork_execute ("ld", lto_ld_argv
);
1097 main (int argc
, char **argv
)
1099 static const char *const ld_suffix
= "ld";
1100 static const char *const real_ld_suffix
= "real-ld";
1101 static const char *const collect_ld_suffix
= "collect-ld";
1102 static const char *const nm_suffix
= "nm";
1103 static const char *const gnm_suffix
= "gnm";
1105 static const char *const ldd_suffix
= LDD_SUFFIX
;
1107 static const char *const strip_suffix
= "strip";
1108 static const char *const gstrip_suffix
= "gstrip";
1110 #ifdef CROSS_DIRECTORY_STRUCTURE
1111 /* If we look for a program in the compiler directories, we just use
1112 the short name, since these directories are already system-specific.
1113 But it we look for a program in the system directories, we need to
1114 qualify the program name with the target machine. */
1116 const char *const full_ld_suffix
=
1117 concat(target_machine
, "-", ld_suffix
, NULL
);
1118 const char *const full_nm_suffix
=
1119 concat (target_machine
, "-", nm_suffix
, NULL
);
1120 const char *const full_gnm_suffix
=
1121 concat (target_machine
, "-", gnm_suffix
, NULL
);
1123 const char *const full_ldd_suffix
=
1124 concat (target_machine
, "-", ldd_suffix
, NULL
);
1126 const char *const full_strip_suffix
=
1127 concat (target_machine
, "-", strip_suffix
, NULL
);
1128 const char *const full_gstrip_suffix
=
1129 concat (target_machine
, "-", gstrip_suffix
, NULL
);
1131 const char *const full_ld_suffix
= ld_suffix
;
1132 const char *const full_nm_suffix
= nm_suffix
;
1133 const char *const full_gnm_suffix
= gnm_suffix
;
1135 const char *const full_ldd_suffix
= ldd_suffix
;
1137 const char *const full_strip_suffix
= strip_suffix
;
1138 const char *const full_gstrip_suffix
= gstrip_suffix
;
1139 #endif /* CROSS_DIRECTORY_STRUCTURE */
1143 #ifdef COLLECT_EXPORT_LIST
1146 const char *ld_file_name
;
1153 /* The kinds of symbols we will have to consider when scanning the
1154 outcome of a first pass link. This is ALL to start with, then might
1155 be adjusted before getting to the first pass link per se, typically on
1156 AIX where we perform an early scan of objects and libraries to fetch
1157 the list of global ctors/dtors and make sure they are not garbage
1159 scanfilter ld1_filter
= SCAN_ALL
;
1164 const char **object
;
1170 expandargv (&argc
, &argv
);
1171 if (argv
!= old_argv
)
1172 at_file_supplied
= 1;
1174 num_c_args
= argc
+ 9;
1176 no_demangle
= !! getenv ("COLLECT_NO_DEMANGLE");
1178 /* Suppress demangling by the real linker, which may be broken. */
1179 putenv (xstrdup ("COLLECT_NO_DEMANGLE="));
1181 #if defined (COLLECT2_HOST_INITIALIZATION)
1182 /* Perform system dependent initialization, if necessary. */
1183 COLLECT2_HOST_INITIALIZATION
;
1187 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
1188 receive the signal. A different setting is inheritable */
1189 signal (SIGCHLD
, SIG_DFL
);
1192 /* Unlock the stdio streams. */
1193 unlock_std_streams ();
1195 gcc_init_libintl ();
1197 /* Do not invoke xcalloc before this point, since locale needs to be
1198 set first, in case a diagnostic is issued. */
1200 ld1_argv
= XCNEWVEC (char *, argc
+ 4);
1201 ld1
= CONST_CAST2 (const char **, char **, ld1_argv
);
1202 ld2_argv
= XCNEWVEC (char *, argc
+ 11);
1203 ld2
= CONST_CAST2 (const char **, char **, ld2_argv
);
1204 object_lst
= XCNEWVEC (char *, argc
);
1205 object
= CONST_CAST2 (const char **, char **, object_lst
);
1211 /* Parse command line early for instances of -debug. This allows
1212 the debug flag to be set before functions like find_a_file()
1213 are called. We also look for the -flto or -fwhopr flag to know
1214 what LTO mode we are in. */
1217 bool use_plugin
= false;
1219 for (i
= 1; argv
[i
] != NULL
; i
++)
1221 if (! strcmp (argv
[i
], "-debug"))
1223 else if (! strcmp (argv
[i
], "-flto") && ! use_plugin
)
1224 lto_mode
= LTO_MODE_LTO
;
1225 else if (! strcmp (argv
[i
], "-fwhopr") && ! use_plugin
)
1226 lto_mode
= LTO_MODE_WHOPR
;
1227 else if (! strcmp (argv
[i
], "-plugin"))
1230 lto_mode
= LTO_MODE_NONE
;
1232 #ifdef COLLECT_EXPORT_LIST
1233 /* since -brtl, -bexport, -b64 are not position dependent
1234 also check for them here */
1235 if ((argv
[i
][0] == '-') && (argv
[i
][1] == 'b'))
1238 /* We want to disable automatic exports on AIX when user
1239 explicitly puts an export list in command line */
1240 if (arg
[2] == 'E' || strncmp (&arg
[2], "export", 6) == 0)
1242 else if (arg
[2] == '6' && arg
[3] == '4')
1244 else if (arg
[2] == 'r' && arg
[3] == 't' && arg
[4] == 'l')
1252 #ifndef DEFAULT_A_OUT_NAME
1253 output_file
= "a.out";
1255 output_file
= DEFAULT_A_OUT_NAME
;
1258 obstack_begin (&temporary_obstack
, 0);
1259 temporary_firstobj
= (char *) obstack_alloc (&temporary_obstack
, 0);
1261 #ifndef HAVE_LD_DEMANGLE
1262 current_demangling_style
= auto_demangling
;
1264 p
= getenv ("COLLECT_GCC_OPTIONS");
1267 const char *q
= extract_string (&p
);
1268 if (*q
== '-' && (q
[1] == 'm' || q
[1] == 'f'))
1271 obstack_free (&temporary_obstack
, temporary_firstobj
);
1273 /* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities
1274 -fno-exceptions -w */
1277 c_argv
= XCNEWVEC (char *, num_c_args
);
1278 c_ptr
= CONST_CAST2 (const char **, char **, c_argv
);
1281 fatal ("no arguments");
1284 if (signal (SIGQUIT
, SIG_IGN
) != SIG_IGN
)
1285 signal (SIGQUIT
, handler
);
1287 if (signal (SIGINT
, SIG_IGN
) != SIG_IGN
)
1288 signal (SIGINT
, handler
);
1290 if (signal (SIGALRM
, SIG_IGN
) != SIG_IGN
)
1291 signal (SIGALRM
, handler
);
1294 if (signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
1295 signal (SIGHUP
, handler
);
1297 if (signal (SIGSEGV
, SIG_IGN
) != SIG_IGN
)
1298 signal (SIGSEGV
, handler
);
1300 if (signal (SIGBUS
, SIG_IGN
) != SIG_IGN
)
1301 signal (SIGBUS
, handler
);
1304 /* Extract COMPILER_PATH and PATH into our prefix list. */
1305 prefix_from_env ("COMPILER_PATH", &cpath
);
1306 prefix_from_env ("PATH", &path
);
1308 /* Try to discover a valid linker/nm/strip to use. */
1310 /* Maybe we know the right file to use (if not cross). */
1312 #ifdef DEFAULT_LINKER
1313 if (access (DEFAULT_LINKER
, X_OK
) == 0)
1314 ld_file_name
= DEFAULT_LINKER
;
1315 if (ld_file_name
== 0)
1317 #ifdef REAL_LD_FILE_NAME
1318 ld_file_name
= find_a_file (&path
, REAL_LD_FILE_NAME
);
1319 if (ld_file_name
== 0)
1321 /* Search the (target-specific) compiler dirs for ld'. */
1322 ld_file_name
= find_a_file (&cpath
, real_ld_suffix
);
1323 /* Likewise for `collect-ld'. */
1324 if (ld_file_name
== 0)
1325 ld_file_name
= find_a_file (&cpath
, collect_ld_suffix
);
1326 /* Search the compiler directories for `ld'. We have protection against
1327 recursive calls in find_a_file. */
1328 if (ld_file_name
== 0)
1329 ld_file_name
= find_a_file (&cpath
, ld_suffix
);
1330 /* Search the ordinary system bin directories
1331 for `ld' (if native linking) or `TARGET-ld' (if cross). */
1332 if (ld_file_name
== 0)
1333 ld_file_name
= find_a_file (&path
, full_ld_suffix
);
1335 #ifdef REAL_NM_FILE_NAME
1336 nm_file_name
= find_a_file (&path
, REAL_NM_FILE_NAME
);
1337 if (nm_file_name
== 0)
1339 nm_file_name
= find_a_file (&cpath
, gnm_suffix
);
1340 if (nm_file_name
== 0)
1341 nm_file_name
= find_a_file (&path
, full_gnm_suffix
);
1342 if (nm_file_name
== 0)
1343 nm_file_name
= find_a_file (&cpath
, nm_suffix
);
1344 if (nm_file_name
== 0)
1345 nm_file_name
= find_a_file (&path
, full_nm_suffix
);
1348 ldd_file_name
= find_a_file (&cpath
, ldd_suffix
);
1349 if (ldd_file_name
== 0)
1350 ldd_file_name
= find_a_file (&path
, full_ldd_suffix
);
1353 #ifdef REAL_STRIP_FILE_NAME
1354 strip_file_name
= find_a_file (&path
, REAL_STRIP_FILE_NAME
);
1355 if (strip_file_name
== 0)
1357 strip_file_name
= find_a_file (&cpath
, gstrip_suffix
);
1358 if (strip_file_name
== 0)
1359 strip_file_name
= find_a_file (&path
, full_gstrip_suffix
);
1360 if (strip_file_name
== 0)
1361 strip_file_name
= find_a_file (&cpath
, strip_suffix
);
1362 if (strip_file_name
== 0)
1363 strip_file_name
= find_a_file (&path
, full_strip_suffix
);
1365 /* Determine the full path name of the C compiler to use. */
1366 c_file_name
= getenv ("COLLECT_GCC");
1367 if (c_file_name
== 0)
1369 #ifdef CROSS_DIRECTORY_STRUCTURE
1370 c_file_name
= concat (target_machine
, "-gcc", NULL
);
1372 c_file_name
= "gcc";
1376 p
= find_a_file (&cpath
, c_file_name
);
1378 /* Here it should be safe to use the system search path since we should have
1379 already qualified the name of the compiler when it is needed. */
1381 p
= find_a_file (&path
, c_file_name
);
1386 *ld1
++ = *ld2
++ = ld_file_name
;
1388 /* Make temp file names. */
1389 c_file
= make_temp_file (".c");
1390 o_file
= make_temp_file (".o");
1391 #ifdef COLLECT_EXPORT_LIST
1392 export_file
= make_temp_file (".x");
1394 ldout
= make_temp_file (".ld");
1395 lderrout
= make_temp_file (".le");
1396 *c_ptr
++ = c_file_name
;
1403 #ifdef COLLECT_EXPORT_LIST
1404 /* Generate a list of directories from LIBPATH. */
1405 prefix_from_env ("LIBPATH", &libpath_lib_dirs
);
1406 /* Add to this list also two standard directories where
1407 AIX loader always searches for libraries. */
1408 add_prefix (&libpath_lib_dirs
, "/lib");
1409 add_prefix (&libpath_lib_dirs
, "/usr/lib");
1412 /* Get any options that the upper GCC wants to pass to the sub-GCC.
1414 AIX support needs to know if -shared has been specified before
1415 parsing commandline arguments. */
1417 p
= getenv ("COLLECT_GCC_OPTIONS");
1420 const char *q
= extract_string (&p
);
1421 if (*q
== '-' && (q
[1] == 'm' || q
[1] == 'f'))
1422 *c_ptr
++ = xstrdup (q
);
1423 if (strcmp (q
, "-EL") == 0 || strcmp (q
, "-EB") == 0)
1424 *c_ptr
++ = xstrdup (q
);
1425 if (strcmp (q
, "-shared") == 0)
1427 if (*q
== '-' && q
[1] == 'B')
1429 *c_ptr
++ = xstrdup (q
);
1432 q
= extract_string (&p
);
1433 *c_ptr
++ = xstrdup (q
);
1437 obstack_free (&temporary_obstack
, temporary_firstobj
);
1438 *c_ptr
++ = "-fno-profile-arcs";
1439 *c_ptr
++ = "-fno-test-coverage";
1440 *c_ptr
++ = "-fno-branch-probabilities";
1441 *c_ptr
++ = "-fno-exceptions";
1444 /* !!! When GCC calls collect2,
1445 it does not know whether it is calling collect2 or ld.
1446 So collect2 cannot meaningfully understand any options
1447 except those ld understands.
1448 If you propose to make GCC pass some other option,
1449 just imagine what will happen if ld is really ld!!! */
1451 /* Parse arguments. Remember output file spec, pass the rest to ld. */
1452 /* After the first file, put in the c++ rt0. */
1455 #ifdef HAVE_LD_DEMANGLE
1456 if (!demangle_flag
&& !no_demangle
)
1457 demangle_flag
= "--demangle";
1459 *ld1
++ = *ld2
++ = demangle_flag
;
1461 while ((arg
= *++argv
) != (char *) 0)
1463 *ld1
++ = *ld2
++ = arg
;
1470 if (!strcmp (arg
, "-debug"))
1472 /* Already parsed. */
1476 if (!strcmp (arg
, "-dynamic-linker") && argv
[1])
1479 *ld1
++ = *ld2
++ = *argv
;
1484 if (strcmp (arg
, "-flto") == 0 || strcmp (arg
, "-fwhopr") == 0)
1487 /* Do not pass LTO flag to the linker. */
1491 error ("LTO support has not been enabled in this "
1500 /* place o_file BEFORE this argument! */
1506 #ifdef COLLECT_EXPORT_LIST
1508 /* Resolving full library name. */
1509 const char *s
= resolve_lib_name (arg
+2);
1511 /* Saving a full library name. */
1512 add_to_list (&libs
, s
);
1517 #ifdef COLLECT_EXPORT_LIST
1518 /* Saving directories where to search for libraries. */
1520 add_prefix (&cmdline_lib_dirs
, arg
+2);
1523 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
1525 if (is_in_args (arg
,
1526 CONST_CAST2 (const char **, char **, ld1_argv
),
1530 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
1535 output_file
= *ld1
++ = *ld2
++ = *++argv
;
1537 #ifdef SWITCHES_NEED_SPACES
1538 && ! strchr (SWITCHES_NEED_SPACES
, arg
[1])
1542 output_file
= &arg
[2];
1551 if (arg
[2] == '\0' && do_collecting
)
1553 /* We must strip after the nm run, otherwise C++ linking
1554 will not work. Thus we strip in the second ld run, or
1555 else with strip if there is no second ld run. */
1567 if (strcmp (arg
, "--no-demangle") == 0)
1569 demangle_flag
= arg
;
1574 else if (strncmp (arg
, "--demangle", 10) == 0)
1576 demangle_flag
= arg
;
1578 #ifndef HAVE_LD_DEMANGLE
1581 enum demangling_styles style
1582 = cplus_demangle_name_to_style (arg
+11);
1583 if (style
== unknown_demangling
)
1584 error ("unknown demangling style '%s'", arg
+11);
1586 current_demangling_style
= style
;
1592 else if (strncmp (arg
, "--sysroot=", 10) == 0)
1593 target_system_root
= arg
+ 10;
1597 else if ((p
= strrchr (arg
, '.')) != (char *) 0
1598 && (strcmp (p
, ".o") == 0 || strcmp (p
, ".a") == 0
1599 || strcmp (p
, ".so") == 0 || strcmp (p
, ".lo") == 0
1600 || strcmp (p
, ".obj") == 0))
1609 /* place o_file BEFORE this argument! */
1615 if (p
[1] == 'o' || p
[1] == 'l')
1617 #ifdef COLLECT_EXPORT_LIST
1618 /* libraries can be specified directly, i.e. without -l flag. */
1621 /* Saving a full library name. */
1622 add_to_list (&libs
, arg
);
1628 #ifdef COLLECT_EXPORT_LIST
1629 /* This is added only for debugging purposes. */
1632 fprintf (stderr
, "List of libraries:\n");
1633 dump_list (stderr
, "\t", libs
.first
);
1636 /* The AIX linker will discard static constructors in object files if
1637 nothing else in the file is referenced, so look at them first. Unless
1638 we are building a shared object, ignore the eh frame tables, as we
1639 would otherwise reference them all, hence drag all the corresponding
1640 objects even if nothing else is referenced. */
1642 const char **export_object_lst
1643 = CONST_CAST2 (const char **, char **, object_lst
);
1645 struct id
*list
= libs
.first
;
1647 /* Compute the filter to use from the current one, do scan, then adjust
1648 the "current" filter to remove what we just included here. This will
1649 control whether we need a first pass link later on or not, and what
1650 will remain to be scanned there. */
1652 scanfilter this_filter
1653 = shared_obj
? ld1_filter
: (ld1_filter
& ~SCAN_DWEH
);
1655 while (export_object_lst
< object
)
1656 scan_prog_file (*export_object_lst
++, PASS_OBJ
, this_filter
);
1658 for (; list
; list
= list
->next
)
1659 scan_prog_file (list
->name
, PASS_FIRST
, this_filter
);
1661 ld1_filter
= ld1_filter
& ~this_filter
;
1666 char *buf
= concat ("-bE:", export_file
, NULL
);
1671 exportf
= fopen (export_file
, "w");
1672 if (exportf
== (FILE *) 0)
1673 fatal_perror ("fopen %s", export_file
);
1674 write_aix_file (exportf
, exports
.first
);
1675 if (fclose (exportf
))
1676 fatal_perror ("fclose %s", export_file
);
1681 *c_ptr
= *ld1
= *object
= (char *) 0;
1685 notice ("collect2 version %s", version_string
);
1686 #ifdef TARGET_VERSION
1689 fprintf (stderr
, "\n");
1695 fprintf (stderr
, "ld_file_name = %s\n",
1696 (ld_file_name
? ld_file_name
: "not found"));
1697 fprintf (stderr
, "c_file_name = %s\n",
1698 (c_file_name
? c_file_name
: "not found"));
1699 fprintf (stderr
, "nm_file_name = %s\n",
1700 (nm_file_name
? nm_file_name
: "not found"));
1702 fprintf (stderr
, "ldd_file_name = %s\n",
1703 (ldd_file_name
? ldd_file_name
: "not found"));
1705 fprintf (stderr
, "strip_file_name = %s\n",
1706 (strip_file_name
? strip_file_name
: "not found"));
1707 fprintf (stderr
, "c_file = %s\n",
1708 (c_file
? c_file
: "not found"));
1709 fprintf (stderr
, "o_file = %s\n",
1710 (o_file
? o_file
: "not found"));
1712 ptr
= getenv ("COLLECT_GCC_OPTIONS");
1714 fprintf (stderr
, "COLLECT_GCC_OPTIONS = %s\n", ptr
);
1716 ptr
= getenv ("COLLECT_GCC");
1718 fprintf (stderr
, "COLLECT_GCC = %s\n", ptr
);
1720 ptr
= getenv ("COMPILER_PATH");
1722 fprintf (stderr
, "COMPILER_PATH = %s\n", ptr
);
1724 ptr
= getenv (LIBRARY_PATH_ENV
);
1726 fprintf (stderr
, "%-20s= %s\n", LIBRARY_PATH_ENV
, ptr
);
1728 fprintf (stderr
, "\n");
1731 /* Load the program, searching all libraries and attempting to provide
1732 undefined symbols from repository information.
1734 If -r or they will be run via some other method, do not build the
1735 constructor or destructor list, just return now. */
1738 = rflag
|| (! DO_COLLECT_EXPORT_LIST
&& ! do_collecting
);
1740 /* Perform the first pass link now, if we're about to exit or if we need
1741 to scan for things we haven't collected yet before pursuing further.
1743 On AIX, the latter typically includes nothing for shared objects or
1744 frame tables for an executable, out of what the required early scan on
1745 objects and libraries has performed above. In the !shared_obj case, we
1746 expect the relevant tables to be dragged together with their associated
1747 functions from precise cross reference insertions by the compiler. */
1749 if (early_exit
|| ld1_filter
!= SCAN_NOTHING
)
1750 do_tlink (ld1_argv
, object_lst
);
1754 #ifdef COLLECT_EXPORT_LIST
1755 /* Make sure we delete the export file we may have created. */
1756 if (export_file
!= 0 && export_file
[0])
1757 maybe_unlink (export_file
);
1760 maybe_run_lto_and_relink (ld1_argv
, object_lst
, object
, false);
1762 maybe_unlink (c_file
);
1763 maybe_unlink (o_file
);
1768 /* Unless we have done it all already, examine the namelist and search for
1769 static constructors and destructors to call. Write the constructor and
1770 destructor tables to a .s file and reload. */
1772 if (ld1_filter
!= SCAN_NOTHING
)
1773 scan_prog_file (output_file
, PASS_FIRST
, ld1_filter
);
1775 #ifdef SCAN_LIBRARIES
1776 scan_libraries (output_file
);
1781 notice ("%d constructor(s) found\n", constructors
.number
);
1782 notice ("%d destructor(s) found\n", destructors
.number
);
1783 notice ("%d frame table(s) found\n", frame_tables
.number
);
1786 /* If the scan exposed nothing of special interest, there's no need to
1787 generate the glue code and relink so return now. */
1789 if (constructors
.number
== 0 && destructors
.number
== 0
1790 && frame_tables
.number
== 0
1791 #if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST)
1792 /* If we will be running these functions ourselves, we want to emit
1793 stubs into the shared library so that we do not have to relink
1794 dependent programs when we add static objects. */
1799 /* Do tlink without additional code generation now if we didn't
1800 do it earlier for scanning purposes. */
1801 if (ld1_filter
== SCAN_NOTHING
)
1802 do_tlink (ld1_argv
, object_lst
);
1805 maybe_run_lto_and_relink (ld1_argv
, object_lst
, object
, false);
1807 /* Strip now if it was requested on the command line. */
1810 char **real_strip_argv
= XCNEWVEC (char *, 3);
1811 const char ** strip_argv
= CONST_CAST2 (const char **, char **,
1814 strip_argv
[0] = strip_file_name
;
1815 strip_argv
[1] = output_file
;
1816 strip_argv
[2] = (char *) 0;
1817 fork_execute ("strip", real_strip_argv
);
1820 #ifdef COLLECT_EXPORT_LIST
1821 maybe_unlink (export_file
);
1823 maybe_unlink (c_file
);
1824 maybe_unlink (o_file
);
1828 /* Sort ctor and dtor lists by priority. */
1829 sort_ids (&constructors
);
1830 sort_ids (&destructors
);
1832 maybe_unlink(output_file
);
1833 outf
= fopen (c_file
, "w");
1834 if (outf
== (FILE *) 0)
1835 fatal_perror ("fopen %s", c_file
);
1837 write_c_file (outf
, c_file
);
1840 fatal_perror ("fclose %s", c_file
);
1842 /* Tell the linker that we have initializer and finalizer functions. */
1843 #ifdef LD_INIT_SWITCH
1844 #ifdef COLLECT_EXPORT_LIST
1845 *ld2
++ = concat (LD_INIT_SWITCH
, ":", initname
, ":", fininame
, NULL
);
1847 *ld2
++ = LD_INIT_SWITCH
;
1849 *ld2
++ = LD_FINI_SWITCH
;
1854 #ifdef COLLECT_EXPORT_LIST
1857 /* If we did not add export flag to link arguments before, add it to
1858 second link phase now. No new exports should have been added. */
1859 if (! exports
.first
)
1860 *ld2
++ = concat ("-bE:", export_file
, NULL
);
1862 #ifndef LD_INIT_SWITCH
1863 add_to_list (&exports
, initname
);
1864 add_to_list (&exports
, fininame
);
1865 add_to_list (&exports
, "_GLOBAL__DI");
1866 add_to_list (&exports
, "_GLOBAL__DD");
1868 exportf
= fopen (export_file
, "w");
1869 if (exportf
== (FILE *) 0)
1870 fatal_perror ("fopen %s", export_file
);
1871 write_aix_file (exportf
, exports
.first
);
1872 if (fclose (exportf
))
1873 fatal_perror ("fclose %s", export_file
);
1877 /* End of arguments to second link phase. */
1882 fprintf (stderr
, "\n========== output_file = %s, c_file = %s\n",
1883 output_file
, c_file
);
1884 write_c_file (stderr
, "stderr");
1885 fprintf (stderr
, "========== end of c_file\n\n");
1886 #ifdef COLLECT_EXPORT_LIST
1887 fprintf (stderr
, "\n========== export_file = %s\n", export_file
);
1888 write_aix_file (stderr
, exports
.first
);
1889 fprintf (stderr
, "========== end of export_file\n\n");
1893 /* Assemble the constructor and destructor tables.
1894 Link the tables in with the rest of the program. */
1896 fork_execute ("gcc", c_argv
);
1897 #ifdef COLLECT_EXPORT_LIST
1898 /* On AIX we must call tlink because of possible templates resolution. */
1899 do_tlink (ld2_argv
, object_lst
);
1902 maybe_run_lto_and_relink (ld2_argv
, object_lst
, object
, false);
1904 /* Otherwise, simply call ld because tlink is already done. */
1906 maybe_run_lto_and_relink (ld2_argv
, object_lst
, object
, true);
1908 fork_execute ("ld", ld2_argv
);
1910 /* Let scan_prog_file do any final mods (OSF/rose needs this for
1911 constructors/destructors in shared libraries. */
1912 scan_prog_file (output_file
, PASS_SECOND
, SCAN_ALL
);
1915 maybe_unlink (c_file
);
1916 maybe_unlink (o_file
);
1918 #ifdef COLLECT_EXPORT_LIST
1919 maybe_unlink (export_file
);
1926 /* Wait for a process to finish, and exit if a nonzero status is found. */
1929 collect_wait (const char *prog
, struct pex_obj
*pex
)
1933 if (!pex_get_status (pex
, 1, &status
))
1934 fatal_perror ("can't get program status");
1939 if (WIFSIGNALED (status
))
1941 int sig
= WTERMSIG (status
);
1942 error ("%s terminated with signal %d [%s]%s",
1943 prog
, sig
, strsignal(sig
),
1944 WCOREDUMP(status
) ? ", core dumped" : "");
1945 collect_exit (FATAL_EXIT_CODE
);
1948 if (WIFEXITED (status
))
1949 return WEXITSTATUS (status
);
1955 do_wait (const char *prog
, struct pex_obj
*pex
)
1957 int ret
= collect_wait (prog
, pex
);
1960 error ("%s returned %d exit status", prog
, ret
);
1966 unlink (response_file
);
1967 response_file
= NULL
;
1972 /* Execute a program, and wait for the reply. */
1975 collect_execute (const char *prog
, char **argv
, const char *outname
,
1976 const char *errname
, int flags
)
1978 struct pex_obj
*pex
;
1981 char *response_arg
= NULL
;
1982 char *response_argv
[3] ATTRIBUTE_UNUSED
;
1984 if (HAVE_GNU_LD
&& at_file_supplied
&& argv
[0] != NULL
)
1986 /* If using @file arguments, create a temporary file and put the
1987 contents of argv into it. Then change argv to an array corresponding
1988 to a single argument @FILE, where FILE is the temporary filename. */
1990 char **current_argv
= argv
+ 1;
1991 char *argv0
= argv
[0];
1995 /* Note: we assume argv contains at least one element; this is
1998 response_file
= make_temp_file ("");
2000 f
= fopen (response_file
, "w");
2003 fatal ("could not open response file %s", response_file
);
2005 status
= writeargv (current_argv
, f
);
2008 fatal ("could not write to response file %s", response_file
);
2010 status
= fclose (f
);
2013 fatal ("could not close response file %s", response_file
);
2015 response_arg
= concat ("@", response_file
, NULL
);
2016 response_argv
[0] = argv0
;
2017 response_argv
[1] = response_arg
;
2018 response_argv
[2] = NULL
;
2020 argv
= response_argv
;
2029 fprintf (stderr
, "%s", argv
[0]);
2031 notice ("[cannot find %s]", prog
);
2033 for (p_argv
= &argv
[1]; (str
= *p_argv
) != (char *) 0; p_argv
++)
2034 fprintf (stderr
, " %s", str
);
2036 fprintf (stderr
, "\n");
2042 /* If we cannot find a program we need, complain error. Do this here
2043 since we might not end up needing something that we could not find. */
2046 fatal ("cannot find '%s'", prog
);
2048 pex
= pex_init (0, "collect2", NULL
);
2050 fatal_perror ("pex_init failed");
2052 errmsg
= pex_run (pex
, flags
, argv
[0], argv
, outname
,
2059 fatal_perror (errmsg
);
2066 free (response_arg
);
2072 fork_execute (const char *prog
, char **argv
)
2074 struct pex_obj
*pex
;
2076 pex
= collect_execute (prog
, argv
, NULL
, NULL
, PEX_LAST
| PEX_SEARCH
);
2077 do_wait (prog
, pex
);
2080 /* Unlink a file unless we are debugging. */
2083 maybe_unlink (const char *file
)
2086 unlink_if_ordinary (file
);
2088 notice ("[Leaving %s]\n", file
);
2091 /* Call maybe_unlink on the NULL-terminated list, FILE_LIST. */
2094 maybe_unlink_list (char **file_list
)
2096 char **tmp
= file_list
;
2099 maybe_unlink (*(tmp
++));
2103 static long sequence_number
= 0;
2105 /* Add a name to a linked list. */
2108 add_to_list (struct head
*head_ptr
, const char *name
)
2111 = (struct id
*) xcalloc (sizeof (struct id
) + strlen (name
), 1);
2113 strcpy (newid
->name
, name
);
2115 if (head_ptr
->first
)
2116 head_ptr
->last
->next
= newid
;
2118 head_ptr
->first
= newid
;
2120 /* Check for duplicate symbols. */
2121 for (p
= head_ptr
->first
;
2122 strcmp (name
, p
->name
) != 0;
2127 head_ptr
->last
->next
= 0;
2132 newid
->sequence
= ++sequence_number
;
2133 head_ptr
->last
= newid
;
2137 /* Grab the init priority number from an init function name that
2138 looks like "_GLOBAL_.I.12345.foo". */
2141 extract_init_priority (const char *name
)
2145 while (name
[pos
] == '_')
2147 pos
+= 10; /* strlen ("GLOBAL__X_") */
2149 /* Extract init_p number from ctor/dtor name. */
2150 pri
= atoi (name
+ pos
);
2151 return pri
? pri
: DEFAULT_INIT_PRIORITY
;
2154 /* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order.
2155 ctors will be run from right to left, dtors from left to right. */
2158 sort_ids (struct head
*head_ptr
)
2160 /* id holds the current element to insert. id_next holds the next
2161 element to insert. id_ptr iterates through the already sorted elements
2162 looking for the place to insert id. */
2163 struct id
*id
, *id_next
, **id_ptr
;
2165 id
= head_ptr
->first
;
2167 /* We don't have any sorted elements yet. */
2168 head_ptr
->first
= NULL
;
2170 for (; id
; id
= id_next
)
2173 id
->sequence
= extract_init_priority (id
->name
);
2175 for (id_ptr
= &(head_ptr
->first
); ; id_ptr
= &((*id_ptr
)->next
))
2177 /* If the sequence numbers are the same, we put the id from the
2178 file later on the command line later in the list. */
2179 || id
->sequence
> (*id_ptr
)->sequence
2180 /* Hack: do lexical compare, too.
2181 || (id->sequence == (*id_ptr)->sequence
2182 && strcmp (id->name, (*id_ptr)->name) > 0) */
2191 /* Now set the sequence numbers properly so write_c_file works. */
2192 for (id
= head_ptr
->first
; id
; id
= id
->next
)
2193 id
->sequence
= ++sequence_number
;
2196 /* Write: `prefix', the names on list LIST, `suffix'. */
2199 write_list (FILE *stream
, const char *prefix
, struct id
*list
)
2203 fprintf (stream
, "%sx%d,\n", prefix
, list
->sequence
);
2208 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
2209 /* Given a STRING, return nonzero if it occurs in the list in range
2210 [ARGS_BEGIN,ARGS_END). */
2213 is_in_args (const char *string
, const char **args_begin
,
2214 const char **args_end
)
2216 const char **args_pointer
;
2217 for (args_pointer
= args_begin
; args_pointer
!= args_end
; ++args_pointer
)
2218 if (strcmp (string
, *args_pointer
) == 0)
2222 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
2224 #ifdef COLLECT_EXPORT_LIST
2225 /* This function is really used only on AIX, but may be useful. */
2228 is_in_list (const char *prefix
, struct id
*list
)
2232 if (!strcmp (prefix
, list
->name
)) return 1;
2238 #endif /* COLLECT_EXPORT_LIST */
2240 /* Added for debugging purpose. */
2241 #ifdef COLLECT_EXPORT_LIST
2243 dump_list (FILE *stream
, const char *prefix
, struct id
*list
)
2247 fprintf (stream
, "%s%s,\n", prefix
, list
->name
);
2255 dump_prefix_list (FILE *stream
, const char *prefix
, struct prefix_list
*list
)
2259 fprintf (stream
, "%s%s,\n", prefix
, list
->prefix
);
2266 write_list_with_asm (FILE *stream
, const char *prefix
, struct id
*list
)
2270 fprintf (stream
, "%sx%d __asm__ (\"%s\");\n",
2271 prefix
, list
->sequence
, list
->name
);
2276 /* Write out the constructor and destructor tables statically (for a shared
2277 object), along with the functions to execute them. */
2280 write_c_file_stat (FILE *stream
, const char *name ATTRIBUTE_UNUSED
)
2284 int frames
= (frame_tables
.number
> 0);
2286 /* Figure out name of output_file, stripping off .so version. */
2287 p
= strrchr (output_file
, '/');
2303 if (strncmp (q
, SHLIB_SUFFIX
, strlen (SHLIB_SUFFIX
)) == 0)
2305 q
+= strlen (SHLIB_SUFFIX
);
2312 /* q points to null at end of the string (or . of the .so version) */
2313 prefix
= XNEWVEC (char, q
- p
+ 1);
2314 strncpy (prefix
, p
, q
- p
);
2316 for (r
= prefix
; *r
; r
++)
2317 if (!ISALNUM ((unsigned char)*r
))
2320 notice ("\nwrite_c_file - output name is %s, prefix is %s\n",
2321 output_file
, prefix
);
2323 initname
= concat ("_GLOBAL__FI_", prefix
, NULL
);
2324 fininame
= concat ("_GLOBAL__FD_", prefix
, NULL
);
2328 /* Write the tables as C code. */
2330 fprintf (stream
, "static int count;\n");
2331 fprintf (stream
, "typedef void entry_pt();\n");
2332 write_list_with_asm (stream
, "extern entry_pt ", constructors
.first
);
2336 write_list_with_asm (stream
, "extern void *", frame_tables
.first
);
2338 fprintf (stream
, "\tstatic void *frame_table[] = {\n");
2339 write_list (stream
, "\t\t&", frame_tables
.first
);
2340 fprintf (stream
, "\t0\n};\n");
2342 /* This must match what's in frame.h. */
2343 fprintf (stream
, "struct object {\n");
2344 fprintf (stream
, " void *pc_begin;\n");
2345 fprintf (stream
, " void *pc_end;\n");
2346 fprintf (stream
, " void *fde_begin;\n");
2347 fprintf (stream
, " void *fde_array;\n");
2348 fprintf (stream
, " __SIZE_TYPE__ count;\n");
2349 fprintf (stream
, " struct object *next;\n");
2350 fprintf (stream
, "};\n");
2352 fprintf (stream
, "extern void __register_frame_info_table (void *, struct object *);\n");
2353 fprintf (stream
, "extern void *__deregister_frame_info (void *);\n");
2355 fprintf (stream
, "static void reg_frame () {\n");
2356 fprintf (stream
, "\tstatic struct object ob;\n");
2357 fprintf (stream
, "\t__register_frame_info_table (frame_table, &ob);\n");
2358 fprintf (stream
, "\t}\n");
2360 fprintf (stream
, "static void dereg_frame () {\n");
2361 fprintf (stream
, "\t__deregister_frame_info (frame_table);\n");
2362 fprintf (stream
, "\t}\n");
2365 fprintf (stream
, "void %s() {\n", initname
);
2366 if (constructors
.number
> 0 || frames
)
2368 fprintf (stream
, "\tstatic entry_pt *ctors[] = {\n");
2369 write_list (stream
, "\t\t", constructors
.first
);
2371 fprintf (stream
, "\treg_frame,\n");
2372 fprintf (stream
, "\t};\n");
2373 fprintf (stream
, "\tentry_pt **p;\n");
2374 fprintf (stream
, "\tif (count++ != 0) return;\n");
2375 fprintf (stream
, "\tp = ctors + %d;\n", constructors
.number
+ frames
);
2376 fprintf (stream
, "\twhile (p > ctors) (*--p)();\n");
2379 fprintf (stream
, "\t++count;\n");
2380 fprintf (stream
, "}\n");
2381 write_list_with_asm (stream
, "extern entry_pt ", destructors
.first
);
2382 fprintf (stream
, "void %s() {\n", fininame
);
2383 if (destructors
.number
> 0 || frames
)
2385 fprintf (stream
, "\tstatic entry_pt *dtors[] = {\n");
2386 write_list (stream
, "\t\t", destructors
.first
);
2388 fprintf (stream
, "\tdereg_frame,\n");
2389 fprintf (stream
, "\t};\n");
2390 fprintf (stream
, "\tentry_pt **p;\n");
2391 fprintf (stream
, "\tif (--count != 0) return;\n");
2392 fprintf (stream
, "\tp = dtors;\n");
2393 fprintf (stream
, "\twhile (p < dtors + %d) (*p++)();\n",
2394 destructors
.number
+ frames
);
2396 fprintf (stream
, "}\n");
2400 COLLECT_SHARED_INIT_FUNC(stream
, initname
);
2401 COLLECT_SHARED_FINI_FUNC(stream
, fininame
);
2405 /* Write the constructor/destructor tables. */
2407 #ifndef LD_INIT_SWITCH
2409 write_c_file_glob (FILE *stream
, const char *name ATTRIBUTE_UNUSED
)
2411 /* Write the tables as C code. */
2413 int frames
= (frame_tables
.number
> 0);
2415 fprintf (stream
, "typedef void entry_pt();\n\n");
2417 write_list_with_asm (stream
, "extern entry_pt ", constructors
.first
);
2421 write_list_with_asm (stream
, "extern void *", frame_tables
.first
);
2423 fprintf (stream
, "\tstatic void *frame_table[] = {\n");
2424 write_list (stream
, "\t\t&", frame_tables
.first
);
2425 fprintf (stream
, "\t0\n};\n");
2427 /* This must match what's in frame.h. */
2428 fprintf (stream
, "struct object {\n");
2429 fprintf (stream
, " void *pc_begin;\n");
2430 fprintf (stream
, " void *pc_end;\n");
2431 fprintf (stream
, " void *fde_begin;\n");
2432 fprintf (stream
, " void *fde_array;\n");
2433 fprintf (stream
, " __SIZE_TYPE__ count;\n");
2434 fprintf (stream
, " struct object *next;\n");
2435 fprintf (stream
, "};\n");
2437 fprintf (stream
, "extern void __register_frame_info_table (void *, struct object *);\n");
2438 fprintf (stream
, "extern void *__deregister_frame_info (void *);\n");
2440 fprintf (stream
, "static void reg_frame () {\n");
2441 fprintf (stream
, "\tstatic struct object ob;\n");
2442 fprintf (stream
, "\t__register_frame_info_table (frame_table, &ob);\n");
2443 fprintf (stream
, "\t}\n");
2445 fprintf (stream
, "static void dereg_frame () {\n");
2446 fprintf (stream
, "\t__deregister_frame_info (frame_table);\n");
2447 fprintf (stream
, "\t}\n");
2450 fprintf (stream
, "\nentry_pt * __CTOR_LIST__[] = {\n");
2451 fprintf (stream
, "\t(entry_pt *) %d,\n", constructors
.number
+ frames
);
2452 write_list (stream
, "\t", constructors
.first
);
2454 fprintf (stream
, "\treg_frame,\n");
2455 fprintf (stream
, "\t0\n};\n\n");
2457 write_list_with_asm (stream
, "extern entry_pt ", destructors
.first
);
2459 fprintf (stream
, "\nentry_pt * __DTOR_LIST__[] = {\n");
2460 fprintf (stream
, "\t(entry_pt *) %d,\n", destructors
.number
+ frames
);
2461 write_list (stream
, "\t", destructors
.first
);
2463 fprintf (stream
, "\tdereg_frame,\n");
2464 fprintf (stream
, "\t0\n};\n\n");
2466 fprintf (stream
, "extern entry_pt %s;\n", NAME__MAIN
);
2467 fprintf (stream
, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN
);
2469 #endif /* ! LD_INIT_SWITCH */
2472 write_c_file (FILE *stream
, const char *name
)
2474 #ifndef LD_INIT_SWITCH
2476 write_c_file_glob (stream
, name
);
2479 write_c_file_stat (stream
, name
);
2482 #ifdef COLLECT_EXPORT_LIST
2484 write_aix_file (FILE *stream
, struct id
*list
)
2486 for (; list
; list
= list
->next
)
2488 fputs (list
->name
, stream
);
2489 putc ('\n', stream
);
2494 #ifdef OBJECT_FORMAT_NONE
2496 /* Check to make sure the file is an ELF file. LTO objects must
2497 be in ELF format. */
2500 is_elf (const char *prog_name
)
2504 static char magic
[4] = { 0x7f, 'E', 'L', 'F' };
2506 f
= fopen (prog_name
, "r");
2509 if (fread (buf
, sizeof (buf
), 1, f
) != 1)
2512 return memcmp (buf
, magic
, sizeof (magic
)) == 0;
2515 /* Generic version to scan the name list of the loaded program for
2516 the symbols g++ uses for static constructors and destructors. */
2519 scan_prog_file (const char *prog_name
, scanpass which_pass
,
2522 void (*int_handler
) (int);
2524 void (*quit_handler
) (int);
2526 char *real_nm_argv
[4];
2527 const char **nm_argv
= CONST_CAST2 (const char **, char**, real_nm_argv
);
2529 struct pex_obj
*pex
;
2536 if (which_pass
== PASS_SECOND
)
2539 /* LTO objects must be in ELF format. This check prevents
2540 us from accepting an archive containing LTO objects, which
2541 gcc cannnot currently handle. */
2542 if (which_pass
== PASS_LTOINFO
&& !is_elf (prog_name
))
2545 /* If we do not have an `nm', complain. */
2546 if (nm_file_name
== 0)
2547 fatal ("cannot find 'nm'");
2549 nm_argv
[argc
++] = nm_file_name
;
2550 if (NM_FLAGS
[0] != '\0')
2551 nm_argv
[argc
++] = NM_FLAGS
;
2553 nm_argv
[argc
++] = prog_name
;
2554 nm_argv
[argc
++] = (char *) 0;
2556 /* Trace if needed. */
2559 const char **p_argv
;
2562 for (p_argv
= &nm_argv
[0]; (str
= *p_argv
) != (char *) 0; p_argv
++)
2563 fprintf (stderr
, " %s", str
);
2565 fprintf (stderr
, "\n");
2571 pex
= pex_init (PEX_USE_PIPES
, "collect2", NULL
);
2573 fatal_perror ("pex_init failed");
2575 errmsg
= pex_run (pex
, 0, nm_file_name
, real_nm_argv
, NULL
, HOST_BIT_BUCKET
,
2582 fatal_perror (errmsg
);
2588 int_handler
= (void (*) (int)) signal (SIGINT
, SIG_IGN
);
2590 quit_handler
= (void (*) (int)) signal (SIGQUIT
, SIG_IGN
);
2593 inf
= pex_read_output (pex
, 0);
2595 fatal_perror ("can't open nm output");
2599 if (which_pass
== PASS_LTOINFO
)
2600 fprintf (stderr
, "\nnm output with LTO info marker symbol.\n");
2602 fprintf (stderr
, "\nnm output with constructors/destructors.\n");
2605 /* Read each line of nm output. */
2606 while (fgets (buf
, sizeof buf
, inf
) != (char *) 0)
2612 fprintf (stderr
, "\t%s\n", buf
);
2614 if (which_pass
== PASS_LTOINFO
)
2619 /* Look for the LTO info marker symbol, and add filename to
2620 the LTO objects list if found. */
2621 for (p
= buf
; (ch
= *p
) != '\0' && ch
!= '\n'; p
++)
2623 && (strncmp (p
+1 , "gnu_lto_v1", 10) == 0)
2626 add_lto_object (<o_objects
, prog_name
);
2628 /* We need to read all the input, so we can't just
2629 return here. But we can avoid useless work. */
2638 /* If it contains a constructor or destructor name, add the name
2639 to the appropriate list unless this is a kind of symbol we're
2640 not supposed to even consider. */
2642 for (p
= buf
; (ch
= *p
) != '\0' && ch
!= '\n' && ch
!= '_'; p
++)
2643 if (ch
== ' ' && p
[1] == 'U' && p
[2] == ' ')
2650 /* Find the end of the symbol name.
2651 Do not include `|', because Encore nm can tack that on the end. */
2652 for (end
= p
; (ch2
= *end
) != '\0' && !ISSPACE (ch2
) && ch2
!= '|';
2658 switch (is_ctor_dtor (name
))
2661 if (! (filter
& SCAN_CTOR
))
2663 if (which_pass
!= PASS_LIB
)
2664 add_to_list (&constructors
, name
);
2668 if (! (filter
& SCAN_DTOR
))
2670 if (which_pass
!= PASS_LIB
)
2671 add_to_list (&destructors
, name
);
2675 if (! (filter
& SCAN_INIT
))
2677 if (which_pass
!= PASS_LIB
)
2678 fatal ("init function found in object %s", prog_name
);
2679 #ifndef LD_INIT_SWITCH
2680 add_to_list (&constructors
, name
);
2685 if (! (filter
& SCAN_FINI
))
2687 if (which_pass
!= PASS_LIB
)
2688 fatal ("fini function found in object %s", prog_name
);
2689 #ifndef LD_FINI_SWITCH
2690 add_to_list (&destructors
, name
);
2695 if (! (filter
& SCAN_DWEH
))
2697 if (which_pass
!= PASS_LIB
)
2698 add_to_list (&frame_tables
, name
);
2701 default: /* not a constructor or destructor */
2707 fprintf (stderr
, "\n");
2709 do_wait (nm_file_name
, pex
);
2711 signal (SIGINT
, int_handler
);
2713 signal (SIGQUIT
, quit_handler
);
2719 /* Use the List Dynamic Dependencies program to find shared libraries that
2720 the output file depends upon and their initialization/finalization
2721 routines, if any. */
2724 scan_libraries (const char *prog_name
)
2726 static struct head libraries
; /* list of shared libraries found */
2728 void (*int_handler
) (int);
2730 void (*quit_handler
) (int);
2732 char *real_ldd_argv
[4];
2733 const char **ldd_argv
= CONST_CAST2 (const char **, char **, real_ldd_argv
);
2735 struct pex_obj
*pex
;
2741 /* If we do not have an `ldd', complain. */
2742 if (ldd_file_name
== 0)
2744 error ("cannot find 'ldd'");
2748 ldd_argv
[argc
++] = ldd_file_name
;
2749 ldd_argv
[argc
++] = prog_name
;
2750 ldd_argv
[argc
++] = (char *) 0;
2752 /* Trace if needed. */
2755 const char **p_argv
;
2758 for (p_argv
= &ldd_argv
[0]; (str
= *p_argv
) != (char *) 0; p_argv
++)
2759 fprintf (stderr
, " %s", str
);
2761 fprintf (stderr
, "\n");
2767 pex
= pex_init (PEX_USE_PIPES
, "collect2", NULL
);
2769 fatal_perror ("pex_init failed");
2771 errmsg
= pex_run (pex
, 0, ldd_file_name
, real_ldd_argv
, NULL
, NULL
, &err
);
2777 fatal_perror (errmsg
);
2783 int_handler
= (void (*) (int)) signal (SIGINT
, SIG_IGN
);
2785 quit_handler
= (void (*) (int)) signal (SIGQUIT
, SIG_IGN
);
2788 inf
= pex_read_output (pex
, 0);
2790 fatal_perror ("can't open ldd output");
2793 notice ("\nldd output with constructors/destructors.\n");
2795 /* Read each line of ldd output. */
2796 while (fgets (buf
, sizeof buf
, inf
) != (char *) 0)
2799 char *name
, *end
, *p
= buf
;
2801 /* Extract names of libraries and add to list. */
2802 PARSE_LDD_OUTPUT (p
);
2807 if (strncmp (name
, "not found", sizeof ("not found") - 1) == 0)
2808 fatal ("dynamic dependency %s not found", buf
);
2810 /* Find the end of the symbol name. */
2812 (ch2
= *end
) != '\0' && ch2
!= '\n' && !ISSPACE (ch2
) && ch2
!= '|';
2817 if (access (name
, R_OK
) == 0)
2818 add_to_list (&libraries
, name
);
2820 fatal ("unable to open dynamic dependency '%s'", buf
);
2823 fprintf (stderr
, "\t%s\n", buf
);
2826 fprintf (stderr
, "\n");
2828 do_wait (ldd_file_name
, pex
);
2830 signal (SIGINT
, int_handler
);
2832 signal (SIGQUIT
, quit_handler
);
2835 /* Now iterate through the library list adding their symbols to
2837 for (list
= libraries
.first
; list
; list
= list
->next
)
2838 scan_prog_file (list
->name
, PASS_LIB
);
2841 #endif /* LDD_SUFFIX */
2843 #endif /* OBJECT_FORMAT_NONE */
2847 * COFF specific stuff.
2850 #ifdef OBJECT_FORMAT_COFF
2852 #if defined (EXTENDED_COFF)
2854 # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax)
2855 # define GCC_SYMENT SYMR
2856 # define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal)
2857 # define GCC_SYMINC(X) (1)
2858 # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax)
2859 # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0)
2863 # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms)
2864 # define GCC_SYMENT SYMENT
2865 # if defined (C_WEAKEXT)
2866 # define GCC_OK_SYMBOL(X) \
2867 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2868 ((X).n_scnum > N_UNDEF) && \
2870 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2871 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2872 # define GCC_UNDEF_SYMBOL(X) \
2873 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2874 ((X).n_scnum == N_UNDEF))
2876 # define GCC_OK_SYMBOL(X) \
2877 (((X).n_sclass == C_EXT) && \
2878 ((X).n_scnum > N_UNDEF) && \
2880 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2881 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2882 # define GCC_UNDEF_SYMBOL(X) \
2883 (((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF))
2885 # define GCC_SYMINC(X) ((X).n_numaux+1)
2886 # define GCC_SYMZERO(X) 0
2888 /* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */
2889 #if TARGET_AIX_VERSION >= 51
2890 # define GCC_CHECK_HDR(X) \
2891 ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2892 || (HEADER (X).f_magic == 0767 && aix64_flag))
2894 # define GCC_CHECK_HDR(X) \
2895 ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2896 || (HEADER (X).f_magic == 0757 && aix64_flag))
2901 #ifdef COLLECT_EXPORT_LIST
2902 /* Array of standard AIX libraries which should not
2903 be scanned for ctors/dtors. */
2904 static const char *const aix_std_libs
[] = {
2912 "/usr/lib/libc_r.a",
2913 "/usr/lib/libm_r.a",
2914 "/usr/lib/threads/libc.a",
2915 "/usr/ccs/lib/libc.a",
2916 "/usr/ccs/lib/libm.a",
2917 "/usr/ccs/lib/libc_r.a",
2918 "/usr/ccs/lib/libm_r.a",
2922 /* This function checks the filename and returns 1
2923 if this name matches the location of a standard AIX library. */
2924 static int ignore_library (const char *);
2926 ignore_library (const char *name
)
2928 const char *const *p
;
2931 if (target_system_root
[0] != '\0')
2933 length
= strlen (target_system_root
);
2934 if (strncmp (name
, target_system_root
, length
) != 0)
2938 for (p
= &aix_std_libs
[0]; *p
!= NULL
; ++p
)
2939 if (strcmp (name
, *p
) == 0)
2943 #endif /* COLLECT_EXPORT_LIST */
2945 #if defined (HAVE_DECL_LDGETNAME) && !HAVE_DECL_LDGETNAME
2946 extern char *ldgetname (LDFILE
*, GCC_SYMENT
*);
2949 /* COFF version to scan the name list of the loaded program for
2950 the symbols g++ uses for static constructors and destructors. */
2953 scan_prog_file (const char *prog_name
, scanpass which_pass
,
2956 LDFILE
*ldptr
= NULL
;
2957 int sym_index
, sym_count
;
2960 if (which_pass
!= PASS_FIRST
&& which_pass
!= PASS_OBJ
)
2963 #ifdef COLLECT_EXPORT_LIST
2964 /* We do not need scanning for some standard C libraries. */
2965 if (which_pass
== PASS_FIRST
&& ignore_library (prog_name
))
2968 /* On AIX we have a loop, because there is not much difference
2969 between an object and an archive. This trick allows us to
2970 eliminate scan_libraries() function. */
2974 /* Some platforms (e.g. OSF4) declare ldopen as taking a
2975 non-const char * filename parameter, even though it will not
2976 modify that string. So we must cast away const-ness here,
2977 using CONST_CAST to prevent complaints from -Wcast-qual. */
2978 if ((ldptr
= ldopen (CONST_CAST (char *, prog_name
), ldptr
)) != NULL
)
2980 if (! MY_ISCOFF (HEADER (ldptr
).f_magic
))
2981 fatal ("%s: not a COFF file", prog_name
);
2983 if (GCC_CHECK_HDR (ldptr
))
2985 sym_count
= GCC_SYMBOLS (ldptr
);
2986 sym_index
= GCC_SYMZERO (ldptr
);
2988 #ifdef COLLECT_EXPORT_LIST
2989 /* Is current archive member a shared object? */
2990 is_shared
= HEADER (ldptr
).f_flags
& F_SHROBJ
;
2993 while (sym_index
< sym_count
)
2997 if (ldtbread (ldptr
, sym_index
, &symbol
) <= 0)
2999 sym_index
+= GCC_SYMINC (symbol
);
3001 if (GCC_OK_SYMBOL (symbol
))
3005 if ((name
= ldgetname (ldptr
, &symbol
)) == NULL
)
3006 continue; /* Should never happen. */
3008 #ifdef XCOFF_DEBUGGING_INFO
3009 /* All AIX function names have a duplicate entry
3010 beginning with a dot. */
3015 switch (is_ctor_dtor (name
))
3018 if (! (filter
& SCAN_CTOR
))
3021 add_to_list (&constructors
, name
);
3022 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3023 if (which_pass
== PASS_OBJ
)
3024 add_to_list (&exports
, name
);
3029 if (! (filter
& SCAN_DTOR
))
3032 add_to_list (&destructors
, name
);
3033 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3034 if (which_pass
== PASS_OBJ
)
3035 add_to_list (&exports
, name
);
3039 #ifdef COLLECT_EXPORT_LIST
3041 if (! (filter
& SCAN_INIT
))
3043 #ifndef LD_INIT_SWITCH
3045 add_to_list (&constructors
, name
);
3050 if (! (filter
& SCAN_FINI
))
3052 #ifndef LD_INIT_SWITCH
3054 add_to_list (&destructors
, name
);
3060 if (! (filter
& SCAN_DWEH
))
3063 add_to_list (&frame_tables
, name
);
3064 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3065 if (which_pass
== PASS_OBJ
)
3066 add_to_list (&exports
, name
);
3070 default: /* not a constructor or destructor */
3071 #ifdef COLLECT_EXPORT_LIST
3072 /* Explicitly export all global symbols when
3073 building a shared object on AIX, but do not
3074 re-export symbols from another shared object
3075 and do not export symbols if the user
3076 provides an explicit export list. */
3077 if (shared_obj
&& !is_shared
3078 && which_pass
== PASS_OBJ
&& !export_flag
)
3079 add_to_list (&exports
, name
);
3085 #if !defined(EXTENDED_COFF)
3086 fprintf (stderr
, "\tsec=%d class=%d type=%s%o %s\n",
3087 symbol
.n_scnum
, symbol
.n_sclass
,
3088 (symbol
.n_type
? "0" : ""), symbol
.n_type
,
3092 "\tiss = %5d, value = %5ld, index = %5d, name = %s\n",
3093 symbol
.iss
, (long) symbol
.value
, symbol
.index
, name
);
3098 #ifdef COLLECT_EXPORT_LIST
3101 /* If archive contains both 32-bit and 64-bit objects,
3102 we want to skip objects in other mode so mismatch normal. */
3104 fprintf (stderr
, "%s : magic=%o aix64=%d mismatch\n",
3105 prog_name
, HEADER (ldptr
).f_magic
, aix64_flag
);
3111 fatal ("%s: cannot open as COFF file", prog_name
);
3113 #ifdef COLLECT_EXPORT_LIST
3114 /* On AIX loop continues while there are more members in archive. */
3116 while (ldclose (ldptr
) == FAILURE
);
3118 /* Otherwise we simply close ldptr. */
3119 (void) ldclose(ldptr
);
3122 #endif /* OBJECT_FORMAT_COFF */
3124 #ifdef COLLECT_EXPORT_LIST
3125 /* Given a library name without "lib" prefix, this function
3126 returns a full library name including a path. */
3128 resolve_lib_name (const char *name
)
3132 /* Library extensions for AIX dynamic linking. */
3133 const char * const libexts
[2] = {"a", "so"};
3135 for (i
= 0; libpaths
[i
]; i
++)
3136 if (libpaths
[i
]->max_len
> l
)
3137 l
= libpaths
[i
]->max_len
;
3139 lib_buf
= XNEWVEC (char, l
+ strlen(name
) + 10);
3141 for (i
= 0; libpaths
[i
]; i
++)
3143 struct prefix_list
*list
= libpaths
[i
]->plist
;
3144 for (; list
; list
= list
->next
)
3146 /* The following lines are needed because path_prefix list
3147 may contain directories both with trailing '/' and
3150 if (list
->prefix
[strlen(list
->prefix
)-1] != '/')
3152 for (j
= 0; j
< 2; j
++)
3154 sprintf (lib_buf
, "%s%slib%s.%s",
3155 list
->prefix
, p
, name
,
3156 libexts
[(j
+ aixrtl_flag
) % 2]);
3157 if (debug
) fprintf (stderr
, "searching for: %s\n", lib_buf
);
3158 if (file_exists (lib_buf
))
3160 if (debug
) fprintf (stderr
, "found: %s\n", lib_buf
);
3167 fprintf (stderr
, "not found\n");
3169 fatal ("library lib%s not found", name
);
3172 #endif /* COLLECT_EXPORT_LIST */