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, 2010, 2011, 2013
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"
33 #include "filenames.h"
35 /* TARGET_64BIT may be defined to use driver specific functionality. */
37 #define TARGET_64BIT TARGET_64BIT_DEFAULT
39 #ifndef LIBRARY_PATH_ENV
40 #define LIBRARY_PATH_ENV "LIBRARY_PATH"
46 #include "collect2-aix.h"
47 #include "diagnostic.h"
53 /* On certain systems, we have code that works by scanning the object file
54 directly. But this code uses system-specific header files and library
55 functions, so turn it off in a cross-compiler. Likewise, the names of
56 the utilities are not correct for a cross-compiler; we have to hope that
57 cross-versions are in the proper directories. */
59 #ifdef CROSS_DIRECTORY_STRUCTURE
60 #ifndef CROSS_AIX_SUPPORT
61 #undef OBJECT_FORMAT_COFF
64 #undef REAL_LD_FILE_NAME
65 #undef REAL_NM_FILE_NAME
66 #undef REAL_STRIP_FILE_NAME
69 /* If we cannot use a special method, use the ordinary one:
70 run nm to find what symbols are present.
71 In a cross-compiler, this means you need a cross nm,
72 but that is not quite as unpleasant as special headers. */
74 #if !defined (OBJECT_FORMAT_COFF)
75 #define OBJECT_FORMAT_NONE
78 #ifdef OBJECT_FORMAT_COFF
80 #ifndef CROSS_DIRECTORY_STRUCTURE
88 /* Many versions of ldfcn.h define these. */
97 /* Some systems have an ISCOFF macro, but others do not. In some cases
98 the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines
99 that either do not have an ISCOFF macro in /usr/include or for those
100 where it is wrong. */
103 #define MY_ISCOFF(X) ISCOFF (X)
106 #endif /* OBJECT_FORMAT_COFF */
108 #ifdef OBJECT_FORMAT_NONE
110 /* Default flags to pass to nm. */
112 #define NM_FLAGS "-n"
115 #endif /* OBJECT_FORMAT_NONE */
117 /* Some systems use __main in a way incompatible with its use in gcc, in these
118 cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
119 give the same symbol without quotes for an alternative entry point. */
121 #define NAME__MAIN "__main"
124 /* This must match tree.h. */
125 #define DEFAULT_INIT_PRIORITY 65535
127 #ifndef COLLECT_SHARED_INIT_FUNC
128 #define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
129 fprintf ((STREAM), "void _GLOBAL__DI() {\n\t%s();\n}\n", (FUNC))
131 #ifndef COLLECT_SHARED_FINI_FUNC
132 #define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
133 fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC))
137 #define SCAN_LIBRARIES
141 #define SHLIB_SUFFIX ".so"
145 int do_collecting
= 1;
147 int do_collecting
= 0;
150 /* Cook up an always defined indication of whether we proceed the
151 "EXPORT_LIST" way. */
153 #ifdef COLLECT_EXPORT_LIST
154 #define DO_COLLECT_EXPORT_LIST 1
156 #define DO_COLLECT_EXPORT_LIST 0
159 /* Nonzero if we should suppress the automatic demangling of identifiers
160 in linker error messages. Set from COLLECT_NO_DEMANGLE. */
163 /* Linked lists of constructor and destructor names. */
179 bool vflag
; /* true if -v or --version */
180 static int rflag
; /* true if -r */
181 static int strip_flag
; /* true if -s */
182 #ifdef COLLECT_EXPORT_LIST
183 static int export_flag
; /* true if -bE */
184 static int aix64_flag
; /* true if -b64 */
185 static int aixrtl_flag
; /* true if -brtl */
189 LTO_MODE_NONE
, /* Not doing LTO. */
190 LTO_MODE_LTO
, /* Normal LTO. */
191 LTO_MODE_WHOPR
/* WHOPR. */
194 /* Current LTO mode. */
195 static enum lto_mode_d lto_mode
= LTO_MODE_NONE
;
197 bool debug
; /* true if -debug */
198 bool helpflag
; /* true if --help */
200 static int shared_obj
; /* true if -shared */
202 static const char *c_file
; /* <xxx>.c for constructor/destructor list. */
203 static const char *o_file
; /* <xxx>.o for constructor/destructor list. */
204 #ifdef COLLECT_EXPORT_LIST
205 static const char *export_file
; /* <xxx>.x for AIX export list. */
207 static char **lto_o_files
; /* Output files for LTO. */
208 const char *ldout
; /* File for ld stdout. */
209 const char *lderrout
; /* File for ld stderr. */
210 static const char *output_file
; /* Output file for ld. */
211 static const char *nm_file_name
; /* pathname of nm */
213 static const char *ldd_file_name
; /* pathname of ldd (or equivalent) */
215 static const char *strip_file_name
; /* pathname of strip */
216 const char *c_file_name
; /* pathname of gcc */
217 static char *initname
, *fininame
; /* names of init and fini funcs */
219 static struct head constructors
; /* list of constructors found */
220 static struct head destructors
; /* list of destructors found */
221 #ifdef COLLECT_EXPORT_LIST
222 static struct head exports
; /* list of exported symbols */
224 static struct head frame_tables
; /* list of frame unwind info tables */
226 static bool at_file_supplied
; /* Whether to use @file arguments */
227 static char *response_file
; /* Name of any current response file */
229 struct obstack temporary_obstack
;
230 char * temporary_firstobj
;
232 /* A string that must be prepended to a target OS path in order to find
233 it on the host system. */
234 #ifdef TARGET_SYSTEM_ROOT
235 static const char *target_system_root
= TARGET_SYSTEM_ROOT
;
237 static const char *target_system_root
= "";
240 /* Structure to hold all the directories in which to search for files to
245 const char *prefix
; /* String to prepend to the path. */
246 struct prefix_list
*next
; /* Next in linked list. */
251 struct prefix_list
*plist
; /* List of prefixes to try */
252 int max_len
; /* Max length of a prefix in PLIST */
253 const char *name
; /* Name of this list (used in config stuff) */
256 #ifdef COLLECT_EXPORT_LIST
257 /* Lists to keep libraries to be scanned for global constructors/destructors. */
258 static struct head libs
; /* list of libraries */
259 static struct path_prefix cmdline_lib_dirs
; /* directories specified with -L */
260 static struct path_prefix libpath_lib_dirs
; /* directories in LIBPATH */
261 static struct path_prefix
*libpaths
[3] = {&cmdline_lib_dirs
,
262 &libpath_lib_dirs
, NULL
};
265 /* List of names of object files containing LTO information.
266 These are a subset of the object file names appearing on the
267 command line, and must be identical, in the sense of pointer
268 equality, with the names passed to maybe_run_lto_and_relink(). */
272 const char *name
; /* Name of object file. */
273 struct lto_object
*next
; /* Next in linked list. */
276 struct lto_object_list
278 struct lto_object
*first
; /* First list element. */
279 struct lto_object
*last
; /* Last list element. */
282 static struct lto_object_list lto_objects
;
284 /* Special kinds of symbols that a name may denote. */
287 SYM_REGULAR
= 0, /* nothing special */
289 SYM_CTOR
= 1, /* constructor */
290 SYM_DTOR
= 2, /* destructor */
291 SYM_INIT
= 3, /* shared object routine that calls all the ctors */
292 SYM_FINI
= 4, /* shared object routine that calls all the dtors */
293 SYM_DWEH
= 5 /* DWARF exception handling table */
296 static symkind
is_ctor_dtor (const char *);
298 static void handler (int);
299 static char *find_a_file (struct path_prefix
*, const char *);
300 static void add_prefix (struct path_prefix
*, const char *);
301 static void prefix_from_env (const char *, struct path_prefix
*);
302 static void prefix_from_string (const char *, struct path_prefix
*);
303 static void do_wait (const char *, struct pex_obj
*);
304 static void fork_execute (const char *, char **);
305 static void maybe_unlink (const char *);
306 static void maybe_unlink_list (char **);
307 static void add_to_list (struct head
*, const char *);
308 static int extract_init_priority (const char *);
309 static void sort_ids (struct head
*);
310 static void write_list (FILE *, const char *, struct id
*);
311 #ifdef COLLECT_EXPORT_LIST
312 static void dump_list (FILE *, const char *, struct id
*);
315 static void dump_prefix_list (FILE *, const char *, struct prefix_list
*);
317 static void write_list_with_asm (FILE *, const char *, struct id
*);
318 static void write_c_file (FILE *, const char *);
319 static void write_c_file_stat (FILE *, const char *);
320 #ifndef LD_INIT_SWITCH
321 static void write_c_file_glob (FILE *, const char *);
323 #ifdef SCAN_LIBRARIES
324 static void scan_libraries (const char *);
326 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
327 static int is_in_args (const char *, const char **, const char **);
329 #ifdef COLLECT_EXPORT_LIST
331 static int is_in_list (const char *, struct id
*);
333 static void write_aix_file (FILE *, struct id
*);
334 static char *resolve_lib_name (const char *);
336 static char *extract_string (const char **);
337 static void post_ld_pass (bool);
338 static void process_args (int *argcp
, char **argv
);
340 /* Enumerations describing which pass this is for scanning the
344 PASS_FIRST
, /* without constructors */
345 PASS_OBJ
, /* individual objects */
346 PASS_LIB
, /* looking for shared libraries */
347 PASS_SECOND
, /* with constructors linked in */
348 PASS_LTOINFO
/* looking for objects with LTO info */
351 /* ... and which kinds of symbols are to be considered. */
353 enum scanfilter_masks
{
356 SCAN_CTOR
= 1 << SYM_CTOR
,
357 SCAN_DTOR
= 1 << SYM_DTOR
,
358 SCAN_INIT
= 1 << SYM_INIT
,
359 SCAN_FINI
= 1 << SYM_FINI
,
360 SCAN_DWEH
= 1 << SYM_DWEH
,
364 /* This type is used for parameters and variables which hold
365 combinations of the flags in enum scanfilter_masks. */
366 typedef int scanfilter
;
368 /* Scan the name list of the loaded program for the symbols g++ uses for
369 static constructors and destructors.
371 The SCANPASS argument tells which collect processing pass this is for and
372 the SCANFILTER argument tells which kinds of symbols to consider in this
373 pass. Symbols of a special kind not in the filter mask are considered as
376 The constructor table begins at __CTOR_LIST__ and contains a count of the
377 number of pointers (or -1 if the constructors are built in a separate
378 section by the linker), followed by the pointers to the constructor
379 functions, terminated with a null pointer. The destructor table has the
380 same format, and begins at __DTOR_LIST__. */
382 static void scan_prog_file (const char *, scanpass
, scanfilter
);
385 /* Delete tempfiles and exit function. */
388 collect_atexit (void)
390 if (c_file
!= 0 && c_file
[0])
391 maybe_unlink (c_file
);
393 if (o_file
!= 0 && o_file
[0])
394 maybe_unlink (o_file
);
396 #ifdef COLLECT_EXPORT_LIST
397 if (export_file
!= 0 && export_file
[0])
398 maybe_unlink (export_file
);
402 maybe_unlink_list (lto_o_files
);
404 if (ldout
!= 0 && ldout
[0])
406 dump_file (ldout
, stdout
);
407 maybe_unlink (ldout
);
410 if (lderrout
!= 0 && lderrout
[0])
412 dump_file (lderrout
, stderr
);
413 maybe_unlink (lderrout
);
417 maybe_unlink (response_file
);
421 /* Notify user of a non-error. */
423 notice (const char *cmsgid
, ...)
427 va_start (ap
, cmsgid
);
428 vfprintf (stderr
, _(cmsgid
), ap
);
432 /* Notify user of a non-error, without translating the format string. */
434 notice_translated (const char *cmsgid
, ...)
438 va_start (ap
, cmsgid
);
439 vfprintf (stderr
, cmsgid
, ap
);
446 if (c_file
!= 0 && c_file
[0])
447 maybe_unlink (c_file
);
449 if (o_file
!= 0 && o_file
[0])
450 maybe_unlink (o_file
);
452 if (ldout
!= 0 && ldout
[0])
453 maybe_unlink (ldout
);
455 if (lderrout
!= 0 && lderrout
[0])
456 maybe_unlink (lderrout
);
458 #ifdef COLLECT_EXPORT_LIST
459 if (export_file
!= 0 && export_file
[0])
460 maybe_unlink (export_file
);
464 maybe_unlink_list (lto_o_files
);
467 maybe_unlink (response_file
);
469 signal (signo
, SIG_DFL
);
475 file_exists (const char *name
)
477 return access (name
, R_OK
) == 0;
480 /* Parse a reasonable subset of shell quoting syntax. */
483 extract_string (const char **pp
)
496 obstack_1grow (&temporary_obstack
, c
);
497 else if (! inside
&& c
== ' ')
499 else if (! inside
&& c
== '\\')
504 obstack_1grow (&temporary_obstack
, c
);
507 obstack_1grow (&temporary_obstack
, '\0');
509 return XOBFINISH (&temporary_obstack
, char *);
513 dump_file (const char *name
, FILE *to
)
515 FILE *stream
= fopen (name
, "r");
522 while (c
= getc (stream
),
523 c
!= EOF
&& (ISIDNUM (c
) || c
== '$' || c
== '.'))
524 obstack_1grow (&temporary_obstack
, c
);
525 if (obstack_object_size (&temporary_obstack
) > 0)
527 const char *word
, *p
;
529 obstack_1grow (&temporary_obstack
, '\0');
530 word
= XOBFINISH (&temporary_obstack
, const char *);
533 ++word
, putc ('.', to
);
535 if (!strncmp (p
, USER_LABEL_PREFIX
, strlen (USER_LABEL_PREFIX
)))
536 p
+= strlen (USER_LABEL_PREFIX
);
538 #ifdef HAVE_LD_DEMANGLE
544 result
= cplus_demangle (p
, DMGL_PARAMS
| DMGL_ANSI
| DMGL_VERBOSE
);
552 diff
= strlen (word
) - strlen (result
);
553 while (diff
> 0 && c
== ' ')
554 --diff
, putc (' ', to
);
555 if (diff
< 0 && c
== ' ')
557 while (diff
< 0 && c
== ' ')
558 ++diff
, c
= getc (stream
);
561 /* Make sure we output at least one space, or
562 the demangled symbol name will run into
563 whatever text follows. */
574 obstack_free (&temporary_obstack
, temporary_firstobj
);
583 /* Return the kind of symbol denoted by name S. */
586 is_ctor_dtor (const char *s
)
588 struct names
{ const char *const name
; const int len
; symkind ret
;
589 const int two_underscores
; };
591 const struct names
*p
;
593 const char *orig_s
= s
;
595 static const struct names special
[] = {
596 #ifndef NO_DOLLAR_IN_LABEL
597 { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, SYM_CTOR
, 0 },
598 { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, SYM_DTOR
, 0 },
600 #ifndef NO_DOT_IN_LABEL
601 { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, SYM_CTOR
, 0 },
602 { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, SYM_DTOR
, 0 },
603 #endif /* NO_DOT_IN_LABEL */
604 #endif /* NO_DOLLAR_IN_LABEL */
605 { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, SYM_CTOR
, 0 },
606 { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, SYM_DTOR
, 0 },
607 { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, SYM_DWEH
, 0 },
608 { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, SYM_INIT
, 0 },
609 { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, SYM_FINI
, 0 },
610 { NULL
, 0, SYM_REGULAR
, 0 }
613 while ((ch
= *s
) == '_')
619 for (p
= &special
[0]; p
->len
> 0; p
++)
622 && (!p
->two_underscores
|| ((s
- orig_s
) >= 2))
623 && strncmp(s
, p
->name
, p
->len
) == 0)
631 /* We maintain two prefix lists: one from COMPILER_PATH environment variable
632 and one from the PATH variable. */
634 static struct path_prefix cpath
, path
;
636 #ifdef CROSS_DIRECTORY_STRUCTURE
637 /* This is the name of the target machine. We use it to form the name
638 of the files to execute. */
640 static const char *const target_machine
= TARGET_MACHINE
;
643 /* Search for NAME using prefix list PPREFIX. We only look for executable
646 Return 0 if not found, otherwise return its name, allocated with malloc. */
649 find_a_file (struct path_prefix
*pprefix
, const char *name
)
652 struct prefix_list
*pl
;
653 int len
= pprefix
->max_len
+ strlen (name
) + 1;
656 fprintf (stderr
, "Looking for '%s'\n", name
);
658 #ifdef HOST_EXECUTABLE_SUFFIX
659 len
+= strlen (HOST_EXECUTABLE_SUFFIX
);
662 temp
= XNEWVEC (char, len
);
664 /* Determine the filename to execute (special case for absolute paths). */
666 if (IS_ABSOLUTE_PATH (name
))
668 if (access (name
, X_OK
) == 0)
673 fprintf (stderr
, " - found: absolute path\n");
678 #ifdef HOST_EXECUTABLE_SUFFIX
679 /* Some systems have a suffix for executable files.
680 So try appending that. */
682 strcat (temp
, HOST_EXECUTABLE_SUFFIX
);
684 if (access (temp
, X_OK
) == 0)
689 fprintf (stderr
, " - failed to locate using absolute path\n");
692 for (pl
= pprefix
->plist
; pl
; pl
= pl
->next
)
696 strcpy (temp
, pl
->prefix
);
699 if (stat (temp
, &st
) >= 0
700 && ! S_ISDIR (st
.st_mode
)
701 && access (temp
, X_OK
) == 0)
704 #ifdef HOST_EXECUTABLE_SUFFIX
705 /* Some systems have a suffix for executable files.
706 So try appending that. */
707 strcat (temp
, HOST_EXECUTABLE_SUFFIX
);
709 if (stat (temp
, &st
) >= 0
710 && ! S_ISDIR (st
.st_mode
)
711 && access (temp
, X_OK
) == 0)
716 if (debug
&& pprefix
->plist
== NULL
)
717 fprintf (stderr
, " - failed: no entries in prefix list\n");
723 /* Add an entry for PREFIX to prefix list PPREFIX. */
726 add_prefix (struct path_prefix
*pprefix
, const char *prefix
)
728 struct prefix_list
*pl
, **prev
;
733 for (pl
= pprefix
->plist
; pl
->next
; pl
= pl
->next
)
738 prev
= &pprefix
->plist
;
740 /* Keep track of the longest prefix. */
742 len
= strlen (prefix
);
743 if (len
> pprefix
->max_len
)
744 pprefix
->max_len
= len
;
746 pl
= XNEW (struct prefix_list
);
747 pl
->prefix
= xstrdup (prefix
);
752 pl
->next
= (struct prefix_list
*) 0;
756 /* Take the value of the environment variable ENV, break it into a path, and
757 add of the entries to PPREFIX. */
760 prefix_from_env (const char *env
, struct path_prefix
*pprefix
)
766 prefix_from_string (p
, pprefix
);
770 prefix_from_string (const char *p
, struct path_prefix
*pprefix
)
772 const char *startp
, *endp
;
773 char *nstore
= XNEWVEC (char, strlen (p
) + 3);
776 fprintf (stderr
, "Convert string '%s' into prefixes, separator = '%c'\n", p
, PATH_SEPARATOR
);
781 if (*endp
== PATH_SEPARATOR
|| *endp
== 0)
783 strncpy (nstore
, startp
, endp
-startp
);
786 strcpy (nstore
, "./");
788 else if (! IS_DIR_SEPARATOR (endp
[-1]))
790 nstore
[endp
-startp
] = DIR_SEPARATOR
;
791 nstore
[endp
-startp
+1] = 0;
794 nstore
[endp
-startp
] = 0;
797 fprintf (stderr
, " - add prefix: %s\n", nstore
);
799 add_prefix (pprefix
, nstore
);
802 endp
= startp
= endp
+ 1;
810 #ifdef OBJECT_FORMAT_NONE
812 /* Add an entry for the object file NAME to object file list LIST.
813 New entries are added at the end of the list. The original pointer
814 value of NAME is preserved, i.e., no string copy is performed. */
817 add_lto_object (struct lto_object_list
*list
, const char *name
)
819 struct lto_object
*n
= XNEW (struct lto_object
);
824 list
->last
->next
= n
;
830 #endif /* OBJECT_FORMAT_NONE */
833 /* Perform a link-time recompilation and relink if any of the object
834 files contain LTO info. The linker command line LTO_LD_ARGV
835 represents the linker command that would produce a final executable
836 without the use of LTO. OBJECT_LST is a vector of object file names
837 appearing in LTO_LD_ARGV that are to be considerd for link-time
838 recompilation, where OBJECT is a pointer to the last valid element.
839 (This awkward convention avoids an impedance mismatch with the
840 usage of similarly-named variables in main().) The elements of
841 OBJECT_LST must be identical, i.e., pointer equal, to the
842 corresponding arguments in LTO_LD_ARGV.
844 Upon entry, at least one linker run has been performed without the
845 use of any LTO info that might be present. Any recompilations
846 necessary for template instantiations have been performed, and
847 initializer/finalizer tables have been created if needed and
848 included in the linker command line LTO_LD_ARGV. If any of the
849 object files contain LTO info, we run the LTO back end on all such
850 files, and perform the final link with the LTO back end output
851 substituted for the LTO-optimized files. In some cases, a final
852 link with all link-time generated code has already been performed,
853 so there is no need to relink if no LTO info is found. In other
854 cases, our caller has not produced the final executable, and is
855 relying on us to perform the required link whether LTO info is
856 present or not. In that case, the FORCE argument should be true.
857 Note that the linker command line argument LTO_LD_ARGV passed into
858 this function may be modified in place. */
861 maybe_run_lto_and_relink (char **lto_ld_argv
, char **object_lst
,
862 const char **object
, bool force
)
864 const char **object_file
= CONST_CAST2 (const char **, char **, object_lst
);
866 int num_lto_c_args
= 1; /* Allow space for the terminating NULL. */
868 while (object_file
< object
)
870 /* If file contains LTO info, add it to the list of LTO objects. */
871 scan_prog_file (*object_file
++, PASS_LTOINFO
, SCAN_ALL
);
873 /* Increment the argument count by the number of object file arguments
874 we will add. An upper bound suffices, so just count all of the
875 object files regardless of whether they contain LTO info. */
879 if (lto_objects
.first
)
882 const char **lto_c_ptr
;
885 struct lto_object
*list
;
886 char *lto_wrapper
= getenv ("COLLECT_LTO_WRAPPER");
888 const char *prog
= "lto-wrapper";
889 int lto_ld_argv_size
= 0;
890 char **out_lto_ld_argv
;
891 int out_lto_ld_argv_size
;
895 fatal_error ("COLLECT_LTO_WRAPPER must be set");
899 /* There is at least one object file containing LTO info,
900 so we need to run the LTO back end and relink.
902 To do so we build updated ld arguments with first
903 LTO object replaced by all partitions and other LTO
906 lto_c_argv
= (char **) xcalloc (sizeof (char *), num_lto_c_args
);
907 lto_c_ptr
= CONST_CAST2 (const char **, char **, lto_c_argv
);
909 *lto_c_ptr
++ = lto_wrapper
;
911 /* Add LTO objects to the wrapper command line. */
912 for (list
= lto_objects
.first
; list
; list
= list
->next
)
913 *lto_c_ptr
++ = list
->name
;
917 /* Run the LTO back end. */
918 pex
= collect_execute (prog
, lto_c_argv
, NULL
, NULL
, PEX_SEARCH
);
925 stream
= pex_read_output (pex
, 0);
929 while ((c
= getc (stream
)) != EOF
)
931 obstack_1grow (&temporary_obstack
, c
);
936 lto_o_files
= XNEWVEC (char *, num_files
+ 1);
937 lto_o_files
[num_files
] = NULL
;
938 start
= XOBFINISH (&temporary_obstack
, char *);
939 for (i
= 0; i
< num_files
; ++i
)
946 lto_o_files
[i
] = xstrdup (start
);
951 obstack_free (&temporary_obstack
, temporary_firstobj
);
956 /* Compute memory needed for new LD arguments. At most number of original arguemtns
957 plus number of partitions. */
958 for (lto_ld_argv_size
= 0; lto_ld_argv
[lto_ld_argv_size
]; lto_ld_argv_size
++)
960 out_lto_ld_argv
= XCNEWVEC(char *, num_files
+ lto_ld_argv_size
+ 1);
961 out_lto_ld_argv_size
= 0;
963 /* After running the LTO back end, we will relink, substituting
964 the LTO output for the object files that we submitted to the
965 LTO. Here, we modify the linker command line for the relink. */
967 /* Copy all arguments until we find first LTO file. */
971 for (list
= lto_objects
.first
; list
; list
= list
->next
)
972 if (*p
== list
->name
) /* Note test for pointer equality! */
976 out_lto_ld_argv
[out_lto_ld_argv_size
++] = *p
++;
979 /* Now insert all LTO partitions. */
980 lto_o_ptr
= lto_o_files
;
982 out_lto_ld_argv
[out_lto_ld_argv_size
++] = *lto_o_ptr
++;
984 /* ... and copy the rest. */
987 for (list
= lto_objects
.first
; list
; list
= list
->next
)
988 if (*p
== list
->name
) /* Note test for pointer equality! */
991 out_lto_ld_argv
[out_lto_ld_argv_size
++] = *p
;
994 out_lto_ld_argv
[out_lto_ld_argv_size
++] = 0;
996 /* Run the linker again, this time replacing the object files
997 optimized by the LTO with the temporary file generated by the LTO. */
998 fork_execute ("ld", out_lto_ld_argv
);
1002 maybe_unlink_list (lto_o_files
);
1006 /* Our caller is relying on us to do the link
1007 even though there is no LTO back end work to be done. */
1008 fork_execute ("ld", lto_ld_argv
);
1009 post_ld_pass (false);
1016 main (int argc
, char **argv
)
1018 static const char *const ld_suffix
= "ld";
1019 static const char *const plugin_ld_suffix
= PLUGIN_LD
;
1020 static const char *const real_ld_suffix
= "real-ld";
1021 static const char *const collect_ld_suffix
= "collect-ld";
1022 static const char *const nm_suffix
= "nm";
1023 static const char *const gnm_suffix
= "gnm";
1025 static const char *const ldd_suffix
= LDD_SUFFIX
;
1027 static const char *const strip_suffix
= "strip";
1028 static const char *const gstrip_suffix
= "gstrip";
1030 #ifdef CROSS_DIRECTORY_STRUCTURE
1031 /* If we look for a program in the compiler directories, we just use
1032 the short name, since these directories are already system-specific.
1033 But it we look for a program in the system directories, we need to
1034 qualify the program name with the target machine. */
1036 const char *const full_ld_suffix
=
1037 concat(target_machine
, "-", ld_suffix
, NULL
);
1038 const char *const full_plugin_ld_suffix
=
1039 concat(target_machine
, "-", plugin_ld_suffix
, NULL
);
1040 const char *const full_nm_suffix
=
1041 concat (target_machine
, "-", nm_suffix
, NULL
);
1042 const char *const full_gnm_suffix
=
1043 concat (target_machine
, "-", gnm_suffix
, NULL
);
1045 const char *const full_ldd_suffix
=
1046 concat (target_machine
, "-", ldd_suffix
, NULL
);
1048 const char *const full_strip_suffix
=
1049 concat (target_machine
, "-", strip_suffix
, NULL
);
1050 const char *const full_gstrip_suffix
=
1051 concat (target_machine
, "-", gstrip_suffix
, NULL
);
1053 const char *const full_ld_suffix
= ld_suffix
;
1054 const char *const full_plugin_ld_suffix
= plugin_ld_suffix
;
1055 const char *const full_nm_suffix
= nm_suffix
;
1056 const char *const full_gnm_suffix
= gnm_suffix
;
1058 const char *const full_ldd_suffix
= ldd_suffix
;
1060 const char *const full_strip_suffix
= strip_suffix
;
1061 const char *const full_gstrip_suffix
= gstrip_suffix
;
1062 #endif /* CROSS_DIRECTORY_STRUCTURE */
1066 #ifdef COLLECT_EXPORT_LIST
1069 const char *ld_file_name
;
1075 bool use_plugin
= false;
1077 /* The kinds of symbols we will have to consider when scanning the
1078 outcome of a first pass link. This is ALL to start with, then might
1079 be adjusted before getting to the first pass link per se, typically on
1080 AIX where we perform an early scan of objects and libraries to fetch
1081 the list of global ctors/dtors and make sure they are not garbage
1083 scanfilter ld1_filter
= SCAN_ALL
;
1088 const char **object
;
1089 #ifdef TARGET_AIX_VERSION
1090 int object_nbr
= argc
;
1096 p
= argv
[0] + strlen (argv
[0]);
1097 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
1101 xmalloc_set_program_name (progname
);
1104 expandargv (&argc
, &argv
);
1105 if (argv
!= old_argv
)
1106 at_file_supplied
= 1;
1108 process_args (&argc
, argv
);
1110 num_c_args
= argc
+ 9;
1112 #ifndef HAVE_LD_DEMANGLE
1113 no_demangle
= !! getenv ("COLLECT_NO_DEMANGLE");
1115 /* Suppress demangling by the real linker, which may be broken. */
1116 putenv (xstrdup ("COLLECT_NO_DEMANGLE=1"));
1119 #if defined (COLLECT2_HOST_INITIALIZATION)
1120 /* Perform system dependent initialization, if necessary. */
1121 COLLECT2_HOST_INITIALIZATION
;
1125 /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
1126 receive the signal. A different setting is inheritable */
1127 signal (SIGCHLD
, SIG_DFL
);
1130 if (atexit (collect_atexit
) != 0)
1131 fatal_error ("atexit failed");
1133 /* Unlock the stdio streams. */
1134 unlock_std_streams ();
1136 gcc_init_libintl ();
1138 diagnostic_initialize (global_dc
, 0);
1140 /* Do not invoke xcalloc before this point, since locale needs to be
1141 set first, in case a diagnostic is issued. */
1143 ld1_argv
= XCNEWVEC (char *, argc
+ 4);
1144 ld1
= CONST_CAST2 (const char **, char **, ld1_argv
);
1145 ld2_argv
= XCNEWVEC (char *, argc
+ 11);
1146 ld2
= CONST_CAST2 (const char **, char **, ld2_argv
);
1147 object_lst
= XCNEWVEC (char *, argc
);
1148 object
= CONST_CAST2 (const char **, char **, object_lst
);
1154 /* Parse command line early for instances of -debug. This allows
1155 the debug flag to be set before functions like find_a_file()
1156 are called. We also look for the -flto or -flto-partition=none flag to know
1157 what LTO mode we are in. */
1160 bool no_partition
= false;
1162 for (i
= 1; argv
[i
] != NULL
; i
++)
1164 if (! strcmp (argv
[i
], "-debug"))
1166 else if (! strcmp (argv
[i
], "-flto-partition=none"))
1167 no_partition
= true;
1168 else if ((! strncmp (argv
[i
], "-flto=", 6)
1169 || ! strcmp (argv
[i
], "-flto")) && ! use_plugin
)
1170 lto_mode
= LTO_MODE_WHOPR
;
1171 else if (!strncmp (argv
[i
], "-fno-lto", 8))
1172 lto_mode
= LTO_MODE_NONE
;
1173 else if (! strcmp (argv
[i
], "-plugin"))
1176 lto_mode
= LTO_MODE_NONE
;
1178 #ifdef COLLECT_EXPORT_LIST
1179 /* since -brtl, -bexport, -b64 are not position dependent
1180 also check for them here */
1181 if ((argv
[i
][0] == '-') && (argv
[i
][1] == 'b'))
1184 /* We want to disable automatic exports on AIX when user
1185 explicitly puts an export list in command line */
1186 if (arg
[2] == 'E' || strncmp (&arg
[2], "export", 6) == 0)
1188 else if (arg
[2] == '6' && arg
[3] == '4')
1190 else if (arg
[2] == 'r' && arg
[3] == 't' && arg
[4] == 'l')
1196 if (no_partition
&& lto_mode
== LTO_MODE_WHOPR
)
1197 lto_mode
= LTO_MODE_LTO
;
1200 #ifndef DEFAULT_A_OUT_NAME
1201 output_file
= "a.out";
1203 output_file
= DEFAULT_A_OUT_NAME
;
1206 obstack_begin (&temporary_obstack
, 0);
1207 temporary_firstobj
= (char *) obstack_alloc (&temporary_obstack
, 0);
1209 #ifndef HAVE_LD_DEMANGLE
1210 current_demangling_style
= auto_demangling
;
1212 p
= getenv ("COLLECT_GCC_OPTIONS");
1215 const char *q
= extract_string (&p
);
1216 if (*q
== '-' && (q
[1] == 'm' || q
[1] == 'f'))
1219 obstack_free (&temporary_obstack
, temporary_firstobj
);
1221 /* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities
1222 -fno-exceptions -w -fno-whole-program */
1225 c_argv
= XCNEWVEC (char *, num_c_args
);
1226 c_ptr
= CONST_CAST2 (const char **, char **, c_argv
);
1229 fatal_error ("no arguments");
1232 if (signal (SIGQUIT
, SIG_IGN
) != SIG_IGN
)
1233 signal (SIGQUIT
, handler
);
1235 if (signal (SIGINT
, SIG_IGN
) != SIG_IGN
)
1236 signal (SIGINT
, handler
);
1238 if (signal (SIGALRM
, SIG_IGN
) != SIG_IGN
)
1239 signal (SIGALRM
, handler
);
1242 if (signal (SIGHUP
, SIG_IGN
) != SIG_IGN
)
1243 signal (SIGHUP
, handler
);
1245 if (signal (SIGSEGV
, SIG_IGN
) != SIG_IGN
)
1246 signal (SIGSEGV
, handler
);
1248 if (signal (SIGBUS
, SIG_IGN
) != SIG_IGN
)
1249 signal (SIGBUS
, handler
);
1252 /* Extract COMPILER_PATH and PATH into our prefix list. */
1253 prefix_from_env ("COMPILER_PATH", &cpath
);
1254 prefix_from_env ("PATH", &path
);
1256 /* Try to discover a valid linker/nm/strip to use. */
1258 /* Maybe we know the right file to use (if not cross). */
1260 #ifdef DEFAULT_LINKER
1261 if (access (DEFAULT_LINKER
, X_OK
) == 0)
1262 ld_file_name
= DEFAULT_LINKER
;
1263 if (ld_file_name
== 0)
1265 #ifdef REAL_LD_FILE_NAME
1266 ld_file_name
= find_a_file (&path
, REAL_LD_FILE_NAME
);
1267 if (ld_file_name
== 0)
1269 /* Search the (target-specific) compiler dirs for ld'. */
1270 ld_file_name
= find_a_file (&cpath
, real_ld_suffix
);
1271 /* Likewise for `collect-ld'. */
1272 if (ld_file_name
== 0)
1273 ld_file_name
= find_a_file (&cpath
, collect_ld_suffix
);
1274 /* Search the compiler directories for `ld'. We have protection against
1275 recursive calls in find_a_file. */
1276 if (ld_file_name
== 0)
1277 ld_file_name
= find_a_file (&cpath
,
1281 /* Search the ordinary system bin directories
1282 for `ld' (if native linking) or `TARGET-ld' (if cross). */
1283 if (ld_file_name
== 0)
1284 ld_file_name
= find_a_file (&path
,
1286 ? full_plugin_ld_suffix
1289 #ifdef REAL_NM_FILE_NAME
1290 nm_file_name
= find_a_file (&path
, REAL_NM_FILE_NAME
);
1291 if (nm_file_name
== 0)
1293 nm_file_name
= find_a_file (&cpath
, gnm_suffix
);
1294 if (nm_file_name
== 0)
1295 nm_file_name
= find_a_file (&path
, full_gnm_suffix
);
1296 if (nm_file_name
== 0)
1297 nm_file_name
= find_a_file (&cpath
, nm_suffix
);
1298 if (nm_file_name
== 0)
1299 nm_file_name
= find_a_file (&path
, full_nm_suffix
);
1302 ldd_file_name
= find_a_file (&cpath
, ldd_suffix
);
1303 if (ldd_file_name
== 0)
1304 ldd_file_name
= find_a_file (&path
, full_ldd_suffix
);
1307 #ifdef REAL_STRIP_FILE_NAME
1308 strip_file_name
= find_a_file (&path
, REAL_STRIP_FILE_NAME
);
1309 if (strip_file_name
== 0)
1311 strip_file_name
= find_a_file (&cpath
, gstrip_suffix
);
1312 if (strip_file_name
== 0)
1313 strip_file_name
= find_a_file (&path
, full_gstrip_suffix
);
1314 if (strip_file_name
== 0)
1315 strip_file_name
= find_a_file (&cpath
, strip_suffix
);
1316 if (strip_file_name
== 0)
1317 strip_file_name
= find_a_file (&path
, full_strip_suffix
);
1319 /* Determine the full path name of the C compiler to use. */
1320 c_file_name
= getenv ("COLLECT_GCC");
1321 if (c_file_name
== 0)
1323 #ifdef CROSS_DIRECTORY_STRUCTURE
1324 c_file_name
= concat (target_machine
, "-gcc", NULL
);
1326 c_file_name
= "gcc";
1330 p
= find_a_file (&cpath
, c_file_name
);
1332 /* Here it should be safe to use the system search path since we should have
1333 already qualified the name of the compiler when it is needed. */
1335 p
= find_a_file (&path
, c_file_name
);
1340 *ld1
++ = *ld2
++ = ld_file_name
;
1342 /* Make temp file names. */
1343 c_file
= make_temp_file (".c");
1344 o_file
= make_temp_file (".o");
1345 #ifdef COLLECT_EXPORT_LIST
1346 export_file
= make_temp_file (".x");
1348 ldout
= make_temp_file (".ld");
1349 lderrout
= make_temp_file (".le");
1350 *c_ptr
++ = c_file_name
;
1357 #ifdef COLLECT_EXPORT_LIST
1358 /* Generate a list of directories from LIBPATH. */
1359 prefix_from_env ("LIBPATH", &libpath_lib_dirs
);
1360 /* Add to this list also two standard directories where
1361 AIX loader always searches for libraries. */
1362 add_prefix (&libpath_lib_dirs
, "/lib");
1363 add_prefix (&libpath_lib_dirs
, "/usr/lib");
1366 /* Get any options that the upper GCC wants to pass to the sub-GCC.
1368 AIX support needs to know if -shared has been specified before
1369 parsing commandline arguments. */
1371 p
= getenv ("COLLECT_GCC_OPTIONS");
1374 const char *q
= extract_string (&p
);
1375 if (*q
== '-' && (q
[1] == 'm' || q
[1] == 'f'))
1376 *c_ptr
++ = xstrdup (q
);
1377 if (strcmp (q
, "-EL") == 0 || strcmp (q
, "-EB") == 0)
1378 *c_ptr
++ = xstrdup (q
);
1379 if (strcmp (q
, "-shared") == 0)
1381 if (*q
== '-' && q
[1] == 'B')
1383 *c_ptr
++ = xstrdup (q
);
1386 q
= extract_string (&p
);
1387 *c_ptr
++ = xstrdup (q
);
1391 obstack_free (&temporary_obstack
, temporary_firstobj
);
1392 *c_ptr
++ = "-fno-profile-arcs";
1393 *c_ptr
++ = "-fno-test-coverage";
1394 *c_ptr
++ = "-fno-branch-probabilities";
1395 *c_ptr
++ = "-fno-exceptions";
1397 *c_ptr
++ = "-fno-whole-program";
1399 /* !!! When GCC calls collect2,
1400 it does not know whether it is calling collect2 or ld.
1401 So collect2 cannot meaningfully understand any options
1402 except those ld understands.
1403 If you propose to make GCC pass some other option,
1404 just imagine what will happen if ld is really ld!!! */
1406 /* Parse arguments. Remember output file spec, pass the rest to ld. */
1407 /* After the first file, put in the c++ rt0. */
1410 while ((arg
= *++argv
) != (char *) 0)
1412 *ld1
++ = *ld2
++ = arg
;
1419 if (!strcmp (arg
, "-debug"))
1421 /* Already parsed. */
1425 if (!strcmp (arg
, "-dynamic-linker") && argv
[1])
1428 *ld1
++ = *ld2
++ = *argv
;
1433 if (strncmp (arg
, "-flto", 5) == 0)
1436 /* Do not pass LTO flag to the linker. */
1440 error ("LTO support has not been enabled in this "
1444 #ifdef TARGET_AIX_VERSION
1447 /* File containing a list of input files to process. */
1450 char buf
[MAXPATHLEN
+ 2];
1451 /* Number of additionnal object files. */
1453 /* Maximum of additionnal object files before vector
1456 const char *list_filename
= arg
+ 2;
1458 /* Accept -fFILENAME and -f FILENAME. */
1459 if (*list_filename
== '\0' && argv
[1])
1462 list_filename
= *argv
;
1463 *ld1
++ = *ld2
++ = *argv
;
1466 stream
= fopen (list_filename
, "r");
1468 fatal_error ("can't open %s: %m", list_filename
);
1470 while (fgets (buf
, sizeof buf
, stream
) != NULL
)
1472 /* Remove end of line. */
1473 int len
= strlen (buf
);
1474 if (len
>= 1 && buf
[len
- 1] =='\n')
1475 buf
[len
- 1] = '\0';
1477 /* Put on object vector.
1478 Note: we only expanse vector here, so we must keep
1479 extra space for remaining arguments. */
1480 if (add_nbr
>= add_max
)
1483 object
- CONST_CAST2 (const char **, char **,
1485 add_max
= (add_max
== 0) ? 16 : add_max
* 2;
1486 object_lst
= XRESIZEVEC (char *, object_lst
,
1487 object_nbr
+ add_max
);
1488 object
= CONST_CAST2 (const char **, char **,
1490 object_nbr
+= add_max
;
1492 *object
++ = xstrdup (buf
);
1503 /* place o_file BEFORE this argument! */
1509 #ifdef COLLECT_EXPORT_LIST
1511 /* Resolving full library name. */
1512 const char *s
= resolve_lib_name (arg
+2);
1514 /* Saving a full library name. */
1515 add_to_list (&libs
, s
);
1520 #ifdef COLLECT_EXPORT_LIST
1521 /* Saving directories where to search for libraries. */
1523 add_prefix (&cmdline_lib_dirs
, arg
+2);
1526 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
1528 if (is_in_args (arg
,
1529 CONST_CAST2 (const char **, char **, ld1_argv
),
1533 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
1538 output_file
= *ld1
++ = *ld2
++ = *++argv
;
1540 output_file
= &arg
[2];
1549 if (arg
[2] == '\0' && do_collecting
)
1551 /* We must strip after the nm run, otherwise C++ linking
1552 will not work. Thus we strip in the second ld run, or
1553 else with strip if there is no second ld run. */
1565 if (strcmp (arg
, "--no-demangle") == 0)
1567 #ifndef HAVE_LD_DEMANGLE
1573 else if (strncmp (arg
, "--demangle", 10) == 0)
1575 #ifndef HAVE_LD_DEMANGLE
1579 enum demangling_styles style
1580 = cplus_demangle_name_to_style (arg
+11);
1581 if (style
== unknown_demangling
)
1582 error ("unknown demangling style '%s'", arg
+11);
1584 current_demangling_style
= style
;
1590 else if (strncmp (arg
, "--sysroot=", 10) == 0)
1591 target_system_root
= arg
+ 10;
1592 else if (strcmp (arg
, "--version") == 0)
1594 else if (strcmp (arg
, "--help") == 0)
1599 else if ((p
= strrchr (arg
, '.')) != (char *) 0
1600 && (strcmp (p
, ".o") == 0 || strcmp (p
, ".a") == 0
1601 || strcmp (p
, ".so") == 0 || strcmp (p
, ".lo") == 0
1602 || strcmp (p
, ".obj") == 0))
1611 /* place o_file BEFORE this argument! */
1617 if (p
[1] == 'o' || p
[1] == 'l')
1619 #ifdef COLLECT_EXPORT_LIST
1620 /* libraries can be specified directly, i.e. without -l flag. */
1623 /* Saving a full library name. */
1624 add_to_list (&libs
, arg
);
1630 #ifdef COLLECT_EXPORT_LIST
1631 /* This is added only for debugging purposes. */
1634 fprintf (stderr
, "List of libraries:\n");
1635 dump_list (stderr
, "\t", libs
.first
);
1638 /* The AIX linker will discard static constructors in object files if
1639 nothing else in the file is referenced, so look at them first. Unless
1640 we are building a shared object, ignore the eh frame tables, as we
1641 would otherwise reference them all, hence drag all the corresponding
1642 objects even if nothing else is referenced. */
1644 const char **export_object_lst
1645 = CONST_CAST2 (const char **, char **, object_lst
);
1647 struct id
*list
= libs
.first
;
1649 /* Compute the filter to use from the current one, do scan, then adjust
1650 the "current" filter to remove what we just included here. This will
1651 control whether we need a first pass link later on or not, and what
1652 will remain to be scanned there. */
1654 scanfilter this_filter
= ld1_filter
;
1657 this_filter
&= ~SCAN_DWEH
;
1660 while (export_object_lst
< object
)
1661 scan_prog_file (*export_object_lst
++, PASS_OBJ
, this_filter
);
1663 for (; list
; list
= list
->next
)
1664 scan_prog_file (list
->name
, PASS_FIRST
, this_filter
);
1666 ld1_filter
= ld1_filter
& ~this_filter
;
1671 char *buf
= concat ("-bE:", export_file
, NULL
);
1676 exportf
= fopen (export_file
, "w");
1677 if (exportf
== (FILE *) 0)
1678 fatal_error ("fopen %s: %m", export_file
);
1679 write_aix_file (exportf
, exports
.first
);
1680 if (fclose (exportf
))
1681 fatal_error ("fclose %s: %m", export_file
);
1686 *c_ptr
= *ld1
= *object
= (char *) 0;
1689 notice ("collect2 version %s\n", version_string
);
1693 printf ("Usage: collect2 [options]\n");
1694 printf (" Wrap linker and generate constructor code if needed.\n");
1695 printf (" Options:\n");
1696 printf (" -debug Enable debug output\n");
1697 printf (" --help Display this information\n");
1698 printf (" -v, --version Display this program's version number\n");
1700 printf ("Overview: http://gcc.gnu.org/onlinedocs/gccint/Collect2.html\n");
1701 printf ("Report bugs: %s\n", bug_report_url
);
1708 fprintf (stderr
, "ld_file_name = %s\n",
1709 (ld_file_name
? ld_file_name
: "not found"));
1710 fprintf (stderr
, "c_file_name = %s\n",
1711 (c_file_name
? c_file_name
: "not found"));
1712 fprintf (stderr
, "nm_file_name = %s\n",
1713 (nm_file_name
? nm_file_name
: "not found"));
1715 fprintf (stderr
, "ldd_file_name = %s\n",
1716 (ldd_file_name
? ldd_file_name
: "not found"));
1718 fprintf (stderr
, "strip_file_name = %s\n",
1719 (strip_file_name
? strip_file_name
: "not found"));
1720 fprintf (stderr
, "c_file = %s\n",
1721 (c_file
? c_file
: "not found"));
1722 fprintf (stderr
, "o_file = %s\n",
1723 (o_file
? o_file
: "not found"));
1725 ptr
= getenv ("COLLECT_GCC_OPTIONS");
1727 fprintf (stderr
, "COLLECT_GCC_OPTIONS = %s\n", ptr
);
1729 ptr
= getenv ("COLLECT_GCC");
1731 fprintf (stderr
, "COLLECT_GCC = %s\n", ptr
);
1733 ptr
= getenv ("COMPILER_PATH");
1735 fprintf (stderr
, "COMPILER_PATH = %s\n", ptr
);
1737 ptr
= getenv (LIBRARY_PATH_ENV
);
1739 fprintf (stderr
, "%-20s= %s\n", LIBRARY_PATH_ENV
, ptr
);
1741 fprintf (stderr
, "\n");
1744 /* Load the program, searching all libraries and attempting to provide
1745 undefined symbols from repository information.
1747 If -r or they will be run via some other method, do not build the
1748 constructor or destructor list, just return now. */
1751 = rflag
|| (! DO_COLLECT_EXPORT_LIST
&& ! do_collecting
);
1753 /* Perform the first pass link now, if we're about to exit or if we need
1754 to scan for things we haven't collected yet before pursuing further.
1756 On AIX, the latter typically includes nothing for shared objects or
1757 frame tables for an executable, out of what the required early scan on
1758 objects and libraries has performed above. In the !shared_obj case, we
1759 expect the relevant tables to be dragged together with their associated
1760 functions from precise cross reference insertions by the compiler. */
1762 if (early_exit
|| ld1_filter
!= SCAN_NOTHING
)
1763 do_tlink (ld1_argv
, object_lst
);
1767 #ifdef COLLECT_EXPORT_LIST
1768 /* Make sure we delete the export file we may have created. */
1769 if (export_file
!= 0 && export_file
[0])
1770 maybe_unlink (export_file
);
1772 if (lto_mode
!= LTO_MODE_NONE
)
1773 maybe_run_lto_and_relink (ld1_argv
, object_lst
, object
, false);
1775 post_ld_pass (false);
1777 maybe_unlink (c_file
);
1778 maybe_unlink (o_file
);
1783 /* Unless we have done it all already, examine the namelist and search for
1784 static constructors and destructors to call. Write the constructor and
1785 destructor tables to a .s file and reload. */
1787 if (ld1_filter
!= SCAN_NOTHING
)
1788 scan_prog_file (output_file
, PASS_FIRST
, ld1_filter
);
1790 #ifdef SCAN_LIBRARIES
1791 scan_libraries (output_file
);
1796 notice_translated (ngettext ("%d constructor found\n",
1797 "%d constructors found\n",
1798 constructors
.number
),
1799 constructors
.number
);
1800 notice_translated (ngettext ("%d destructor found\n",
1801 "%d destructors found\n",
1802 destructors
.number
),
1803 destructors
.number
);
1804 notice_translated (ngettext("%d frame table found\n",
1805 "%d frame tables found\n",
1806 frame_tables
.number
),
1807 frame_tables
.number
);
1810 /* If the scan exposed nothing of special interest, there's no need to
1811 generate the glue code and relink so return now. */
1813 if (constructors
.number
== 0 && destructors
.number
== 0
1814 && frame_tables
.number
== 0
1815 #if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST)
1816 /* If we will be running these functions ourselves, we want to emit
1817 stubs into the shared library so that we do not have to relink
1818 dependent programs when we add static objects. */
1823 /* Do tlink without additional code generation now if we didn't
1824 do it earlier for scanning purposes. */
1825 if (ld1_filter
== SCAN_NOTHING
)
1826 do_tlink (ld1_argv
, object_lst
);
1829 maybe_run_lto_and_relink (ld1_argv
, object_lst
, object
, false);
1831 /* Strip now if it was requested on the command line. */
1834 char **real_strip_argv
= XCNEWVEC (char *, 3);
1835 const char ** strip_argv
= CONST_CAST2 (const char **, char **,
1838 strip_argv
[0] = strip_file_name
;
1839 strip_argv
[1] = output_file
;
1840 strip_argv
[2] = (char *) 0;
1841 fork_execute ("strip", real_strip_argv
);
1844 #ifdef COLLECT_EXPORT_LIST
1845 maybe_unlink (export_file
);
1847 post_ld_pass (false);
1849 maybe_unlink (c_file
);
1850 maybe_unlink (o_file
);
1854 /* Sort ctor and dtor lists by priority. */
1855 sort_ids (&constructors
);
1856 sort_ids (&destructors
);
1858 maybe_unlink(output_file
);
1859 outf
= fopen (c_file
, "w");
1860 if (outf
== (FILE *) 0)
1861 fatal_error ("fopen %s: %m", c_file
);
1863 write_c_file (outf
, c_file
);
1866 fatal_error ("fclose %s: %m", c_file
);
1868 /* Tell the linker that we have initializer and finalizer functions. */
1869 #ifdef LD_INIT_SWITCH
1870 #ifdef COLLECT_EXPORT_LIST
1871 *ld2
++ = concat (LD_INIT_SWITCH
, ":", initname
, ":", fininame
, NULL
);
1873 *ld2
++ = LD_INIT_SWITCH
;
1875 *ld2
++ = LD_FINI_SWITCH
;
1880 #ifdef COLLECT_EXPORT_LIST
1883 /* If we did not add export flag to link arguments before, add it to
1884 second link phase now. No new exports should have been added. */
1885 if (! exports
.first
)
1886 *ld2
++ = concat ("-bE:", export_file
, NULL
);
1888 #ifndef LD_INIT_SWITCH
1889 add_to_list (&exports
, initname
);
1890 add_to_list (&exports
, fininame
);
1891 add_to_list (&exports
, "_GLOBAL__DI");
1892 add_to_list (&exports
, "_GLOBAL__DD");
1894 exportf
= fopen (export_file
, "w");
1895 if (exportf
== (FILE *) 0)
1896 fatal_error ("fopen %s: %m", export_file
);
1897 write_aix_file (exportf
, exports
.first
);
1898 if (fclose (exportf
))
1899 fatal_error ("fclose %s: %m", export_file
);
1903 /* End of arguments to second link phase. */
1908 fprintf (stderr
, "\n========== output_file = %s, c_file = %s\n",
1909 output_file
, c_file
);
1910 write_c_file (stderr
, "stderr");
1911 fprintf (stderr
, "========== end of c_file\n\n");
1912 #ifdef COLLECT_EXPORT_LIST
1913 fprintf (stderr
, "\n========== export_file = %s\n", export_file
);
1914 write_aix_file (stderr
, exports
.first
);
1915 fprintf (stderr
, "========== end of export_file\n\n");
1919 /* Assemble the constructor and destructor tables.
1920 Link the tables in with the rest of the program. */
1922 fork_execute ("gcc", c_argv
);
1923 #ifdef COLLECT_EXPORT_LIST
1924 /* On AIX we must call tlink because of possible templates resolution. */
1925 do_tlink (ld2_argv
, object_lst
);
1928 maybe_run_lto_and_relink (ld2_argv
, object_lst
, object
, false);
1930 /* Otherwise, simply call ld because tlink is already done. */
1932 maybe_run_lto_and_relink (ld2_argv
, object_lst
, object
, true);
1935 fork_execute ("ld", ld2_argv
);
1936 post_ld_pass (false);
1939 /* Let scan_prog_file do any final mods (OSF/rose needs this for
1940 constructors/destructors in shared libraries. */
1941 scan_prog_file (output_file
, PASS_SECOND
, SCAN_ALL
);
1944 maybe_unlink (c_file
);
1945 maybe_unlink (o_file
);
1947 #ifdef COLLECT_EXPORT_LIST
1948 maybe_unlink (export_file
);
1955 /* Wait for a process to finish, and exit if a nonzero status is found. */
1958 collect_wait (const char *prog
, struct pex_obj
*pex
)
1962 if (!pex_get_status (pex
, 1, &status
))
1963 fatal_error ("can't get program status: %m");
1968 if (WIFSIGNALED (status
))
1970 int sig
= WTERMSIG (status
);
1971 error ("%s terminated with signal %d [%s]%s",
1972 prog
, sig
, strsignal(sig
),
1973 WCOREDUMP(status
) ? ", core dumped" : "");
1974 exit (FATAL_EXIT_CODE
);
1977 if (WIFEXITED (status
))
1978 return WEXITSTATUS (status
);
1984 do_wait (const char *prog
, struct pex_obj
*pex
)
1986 int ret
= collect_wait (prog
, pex
);
1989 error ("%s returned %d exit status", prog
, ret
);
1995 unlink (response_file
);
1996 response_file
= NULL
;
2001 /* Execute a program, and wait for the reply. */
2004 collect_execute (const char *prog
, char **argv
, const char *outname
,
2005 const char *errname
, int flags
)
2007 struct pex_obj
*pex
;
2010 char *response_arg
= NULL
;
2011 char *response_argv
[3] ATTRIBUTE_UNUSED
;
2013 if (HAVE_GNU_LD
&& at_file_supplied
&& argv
[0] != NULL
)
2015 /* If using @file arguments, create a temporary file and put the
2016 contents of argv into it. Then change argv to an array corresponding
2017 to a single argument @FILE, where FILE is the temporary filename. */
2019 char **current_argv
= argv
+ 1;
2020 char *argv0
= argv
[0];
2024 /* Note: we assume argv contains at least one element; this is
2027 response_file
= make_temp_file ("");
2029 f
= fopen (response_file
, "w");
2032 fatal_error ("could not open response file %s", response_file
);
2034 status
= writeargv (current_argv
, f
);
2037 fatal_error ("could not write to response file %s", response_file
);
2039 status
= fclose (f
);
2042 fatal_error ("could not close response file %s", response_file
);
2044 response_arg
= concat ("@", response_file
, NULL
);
2045 response_argv
[0] = argv0
;
2046 response_argv
[1] = response_arg
;
2047 response_argv
[2] = NULL
;
2049 argv
= response_argv
;
2058 fprintf (stderr
, "%s", argv
[0]);
2060 notice ("[cannot find %s]", prog
);
2062 for (p_argv
= &argv
[1]; (str
= *p_argv
) != (char *) 0; p_argv
++)
2063 fprintf (stderr
, " %s", str
);
2065 fprintf (stderr
, "\n");
2071 /* If we cannot find a program we need, complain error. Do this here
2072 since we might not end up needing something that we could not find. */
2075 fatal_error ("cannot find '%s'", prog
);
2077 pex
= pex_init (0, "collect2", NULL
);
2079 fatal_error ("pex_init failed: %m");
2081 errmsg
= pex_run (pex
, flags
, argv
[0], argv
, outname
,
2088 fatal_error ("%s: %m", _(errmsg
));
2091 fatal_error (errmsg
);
2094 free (response_arg
);
2100 fork_execute (const char *prog
, char **argv
)
2102 struct pex_obj
*pex
;
2104 pex
= collect_execute (prog
, argv
, NULL
, NULL
, PEX_LAST
| PEX_SEARCH
);
2105 do_wait (prog
, pex
);
2108 /* Unlink a file unless we are debugging. */
2111 maybe_unlink (const char *file
)
2114 unlink_if_ordinary (file
);
2116 notice ("[Leaving %s]\n", file
);
2119 /* Call maybe_unlink on the NULL-terminated list, FILE_LIST. */
2122 maybe_unlink_list (char **file_list
)
2124 char **tmp
= file_list
;
2127 maybe_unlink (*(tmp
++));
2131 static long sequence_number
= 0;
2133 /* Add a name to a linked list. */
2136 add_to_list (struct head
*head_ptr
, const char *name
)
2139 = (struct id
*) xcalloc (sizeof (struct id
) + strlen (name
), 1);
2141 strcpy (newid
->name
, name
);
2143 if (head_ptr
->first
)
2144 head_ptr
->last
->next
= newid
;
2146 head_ptr
->first
= newid
;
2148 /* Check for duplicate symbols. */
2149 for (p
= head_ptr
->first
;
2150 strcmp (name
, p
->name
) != 0;
2155 head_ptr
->last
->next
= 0;
2160 newid
->sequence
= ++sequence_number
;
2161 head_ptr
->last
= newid
;
2165 /* Grab the init priority number from an init function name that
2166 looks like "_GLOBAL_.I.12345.foo". */
2169 extract_init_priority (const char *name
)
2173 while (name
[pos
] == '_')
2175 pos
+= 10; /* strlen ("GLOBAL__X_") */
2177 /* Extract init_p number from ctor/dtor name. */
2178 pri
= atoi (name
+ pos
);
2179 return pri
? pri
: DEFAULT_INIT_PRIORITY
;
2182 /* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order.
2183 ctors will be run from right to left, dtors from left to right. */
2186 sort_ids (struct head
*head_ptr
)
2188 /* id holds the current element to insert. id_next holds the next
2189 element to insert. id_ptr iterates through the already sorted elements
2190 looking for the place to insert id. */
2191 struct id
*id
, *id_next
, **id_ptr
;
2193 id
= head_ptr
->first
;
2195 /* We don't have any sorted elements yet. */
2196 head_ptr
->first
= NULL
;
2198 for (; id
; id
= id_next
)
2201 id
->sequence
= extract_init_priority (id
->name
);
2203 for (id_ptr
= &(head_ptr
->first
); ; id_ptr
= &((*id_ptr
)->next
))
2205 /* If the sequence numbers are the same, we put the id from the
2206 file later on the command line later in the list. */
2207 || id
->sequence
> (*id_ptr
)->sequence
2208 /* Hack: do lexical compare, too.
2209 || (id->sequence == (*id_ptr)->sequence
2210 && strcmp (id->name, (*id_ptr)->name) > 0) */
2219 /* Now set the sequence numbers properly so write_c_file works. */
2220 for (id
= head_ptr
->first
; id
; id
= id
->next
)
2221 id
->sequence
= ++sequence_number
;
2224 /* Write: `prefix', the names on list LIST, `suffix'. */
2227 write_list (FILE *stream
, const char *prefix
, struct id
*list
)
2231 fprintf (stream
, "%sx%d,\n", prefix
, list
->sequence
);
2236 #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
2237 /* Given a STRING, return nonzero if it occurs in the list in range
2238 [ARGS_BEGIN,ARGS_END). */
2241 is_in_args (const char *string
, const char **args_begin
,
2242 const char **args_end
)
2244 const char **args_pointer
;
2245 for (args_pointer
= args_begin
; args_pointer
!= args_end
; ++args_pointer
)
2246 if (strcmp (string
, *args_pointer
) == 0)
2250 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
2252 #ifdef COLLECT_EXPORT_LIST
2253 /* This function is really used only on AIX, but may be useful. */
2256 is_in_list (const char *prefix
, struct id
*list
)
2260 if (!strcmp (prefix
, list
->name
)) return 1;
2266 #endif /* COLLECT_EXPORT_LIST */
2268 /* Added for debugging purpose. */
2269 #ifdef COLLECT_EXPORT_LIST
2271 dump_list (FILE *stream
, const char *prefix
, struct id
*list
)
2275 fprintf (stream
, "%s%s,\n", prefix
, list
->name
);
2283 dump_prefix_list (FILE *stream
, const char *prefix
, struct prefix_list
*list
)
2287 fprintf (stream
, "%s%s,\n", prefix
, list
->prefix
);
2294 write_list_with_asm (FILE *stream
, const char *prefix
, struct id
*list
)
2298 fprintf (stream
, "%sx%d __asm__ (\"%s\");\n",
2299 prefix
, list
->sequence
, list
->name
);
2304 /* Write out the constructor and destructor tables statically (for a shared
2305 object), along with the functions to execute them. */
2308 write_c_file_stat (FILE *stream
, const char *name ATTRIBUTE_UNUSED
)
2312 int frames
= (frame_tables
.number
> 0);
2314 /* Figure out name of output_file, stripping off .so version. */
2315 q
= p
= lbasename (output_file
);
2327 if (filename_ncmp (q
, SHLIB_SUFFIX
, strlen (SHLIB_SUFFIX
)) == 0)
2329 q
+= strlen (SHLIB_SUFFIX
);
2336 /* q points to null at end of the string (or . of the .so version) */
2337 prefix
= XNEWVEC (char, q
- p
+ 1);
2338 strncpy (prefix
, p
, q
- p
);
2340 for (r
= prefix
; *r
; r
++)
2341 if (!ISALNUM ((unsigned char)*r
))
2344 notice ("\nwrite_c_file - output name is %s, prefix is %s\n",
2345 output_file
, prefix
);
2347 initname
= concat ("_GLOBAL__FI_", prefix
, NULL
);
2348 fininame
= concat ("_GLOBAL__FD_", prefix
, NULL
);
2352 /* Write the tables as C code. */
2354 fprintf (stream
, "static int count;\n");
2355 fprintf (stream
, "typedef void entry_pt();\n");
2356 write_list_with_asm (stream
, "extern entry_pt ", constructors
.first
);
2360 write_list_with_asm (stream
, "extern void *", frame_tables
.first
);
2362 fprintf (stream
, "\tstatic void *frame_table[] = {\n");
2363 write_list (stream
, "\t\t&", frame_tables
.first
);
2364 fprintf (stream
, "\t0\n};\n");
2366 /* This must match what's in frame.h. */
2367 fprintf (stream
, "struct object {\n");
2368 fprintf (stream
, " void *pc_begin;\n");
2369 fprintf (stream
, " void *pc_end;\n");
2370 fprintf (stream
, " void *fde_begin;\n");
2371 fprintf (stream
, " void *fde_array;\n");
2372 fprintf (stream
, " __SIZE_TYPE__ count;\n");
2373 fprintf (stream
, " struct object *next;\n");
2374 fprintf (stream
, "};\n");
2376 fprintf (stream
, "extern void __register_frame_info_table (void *, struct object *);\n");
2377 fprintf (stream
, "extern void *__deregister_frame_info (void *);\n");
2379 fprintf (stream
, "static void reg_frame () {\n");
2380 fprintf (stream
, "\tstatic struct object ob;\n");
2381 fprintf (stream
, "\t__register_frame_info_table (frame_table, &ob);\n");
2382 fprintf (stream
, "\t}\n");
2384 fprintf (stream
, "static void dereg_frame () {\n");
2385 fprintf (stream
, "\t__deregister_frame_info (frame_table);\n");
2386 fprintf (stream
, "\t}\n");
2389 fprintf (stream
, "void %s() {\n", initname
);
2390 if (constructors
.number
> 0 || frames
)
2392 fprintf (stream
, "\tstatic entry_pt *ctors[] = {\n");
2393 write_list (stream
, "\t\t", constructors
.first
);
2395 fprintf (stream
, "\treg_frame,\n");
2396 fprintf (stream
, "\t};\n");
2397 fprintf (stream
, "\tentry_pt **p;\n");
2398 fprintf (stream
, "\tif (count++ != 0) return;\n");
2399 fprintf (stream
, "\tp = ctors + %d;\n", constructors
.number
+ frames
);
2400 fprintf (stream
, "\twhile (p > ctors) (*--p)();\n");
2403 fprintf (stream
, "\t++count;\n");
2404 fprintf (stream
, "}\n");
2405 write_list_with_asm (stream
, "extern entry_pt ", destructors
.first
);
2406 fprintf (stream
, "void %s() {\n", fininame
);
2407 if (destructors
.number
> 0 || frames
)
2409 fprintf (stream
, "\tstatic entry_pt *dtors[] = {\n");
2410 write_list (stream
, "\t\t", destructors
.first
);
2412 fprintf (stream
, "\tdereg_frame,\n");
2413 fprintf (stream
, "\t};\n");
2414 fprintf (stream
, "\tentry_pt **p;\n");
2415 fprintf (stream
, "\tif (--count != 0) return;\n");
2416 fprintf (stream
, "\tp = dtors;\n");
2417 fprintf (stream
, "\twhile (p < dtors + %d) (*p++)();\n",
2418 destructors
.number
+ frames
);
2420 fprintf (stream
, "}\n");
2424 COLLECT_SHARED_INIT_FUNC(stream
, initname
);
2425 COLLECT_SHARED_FINI_FUNC(stream
, fininame
);
2429 /* Write the constructor/destructor tables. */
2431 #ifndef LD_INIT_SWITCH
2433 write_c_file_glob (FILE *stream
, const char *name ATTRIBUTE_UNUSED
)
2435 /* Write the tables as C code. */
2437 int frames
= (frame_tables
.number
> 0);
2439 fprintf (stream
, "typedef void entry_pt();\n\n");
2441 write_list_with_asm (stream
, "extern entry_pt ", constructors
.first
);
2445 write_list_with_asm (stream
, "extern void *", frame_tables
.first
);
2447 fprintf (stream
, "\tstatic void *frame_table[] = {\n");
2448 write_list (stream
, "\t\t&", frame_tables
.first
);
2449 fprintf (stream
, "\t0\n};\n");
2451 /* This must match what's in frame.h. */
2452 fprintf (stream
, "struct object {\n");
2453 fprintf (stream
, " void *pc_begin;\n");
2454 fprintf (stream
, " void *pc_end;\n");
2455 fprintf (stream
, " void *fde_begin;\n");
2456 fprintf (stream
, " void *fde_array;\n");
2457 fprintf (stream
, " __SIZE_TYPE__ count;\n");
2458 fprintf (stream
, " struct object *next;\n");
2459 fprintf (stream
, "};\n");
2461 fprintf (stream
, "extern void __register_frame_info_table (void *, struct object *);\n");
2462 fprintf (stream
, "extern void *__deregister_frame_info (void *);\n");
2464 fprintf (stream
, "static void reg_frame () {\n");
2465 fprintf (stream
, "\tstatic struct object ob;\n");
2466 fprintf (stream
, "\t__register_frame_info_table (frame_table, &ob);\n");
2467 fprintf (stream
, "\t}\n");
2469 fprintf (stream
, "static void dereg_frame () {\n");
2470 fprintf (stream
, "\t__deregister_frame_info (frame_table);\n");
2471 fprintf (stream
, "\t}\n");
2474 fprintf (stream
, "\nentry_pt * __CTOR_LIST__[] = {\n");
2475 fprintf (stream
, "\t(entry_pt *) %d,\n", constructors
.number
+ frames
);
2476 write_list (stream
, "\t", constructors
.first
);
2478 fprintf (stream
, "\treg_frame,\n");
2479 fprintf (stream
, "\t0\n};\n\n");
2481 write_list_with_asm (stream
, "extern entry_pt ", destructors
.first
);
2483 fprintf (stream
, "\nentry_pt * __DTOR_LIST__[] = {\n");
2484 fprintf (stream
, "\t(entry_pt *) %d,\n", destructors
.number
+ frames
);
2485 write_list (stream
, "\t", destructors
.first
);
2487 fprintf (stream
, "\tdereg_frame,\n");
2488 fprintf (stream
, "\t0\n};\n\n");
2490 fprintf (stream
, "extern entry_pt %s;\n", NAME__MAIN
);
2491 fprintf (stream
, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN
);
2493 #endif /* ! LD_INIT_SWITCH */
2496 write_c_file (FILE *stream
, const char *name
)
2498 #ifndef LD_INIT_SWITCH
2500 write_c_file_glob (stream
, name
);
2503 write_c_file_stat (stream
, name
);
2506 #ifdef COLLECT_EXPORT_LIST
2508 write_aix_file (FILE *stream
, struct id
*list
)
2510 for (; list
; list
= list
->next
)
2512 fputs (list
->name
, stream
);
2513 putc ('\n', stream
);
2518 #ifdef OBJECT_FORMAT_NONE
2520 /* Check to make sure the file is an LTO object file. */
2523 maybe_lto_object_file (const char *prog_name
)
2526 unsigned char buf
[4];
2529 static unsigned char elfmagic
[4] = { 0x7f, 'E', 'L', 'F' };
2530 static unsigned char coffmagic
[2] = { 0x4c, 0x01 };
2531 static unsigned char coffmagic_x64
[2] = { 0x64, 0x86 };
2532 static unsigned char machomagic
[4][4] = {
2533 { 0xcf, 0xfa, 0xed, 0xfe },
2534 { 0xce, 0xfa, 0xed, 0xfe },
2535 { 0xfe, 0xed, 0xfa, 0xcf },
2536 { 0xfe, 0xed, 0xfa, 0xce }
2539 f
= fopen (prog_name
, "rb");
2542 if (fread (buf
, sizeof (buf
), 1, f
) != 1)
2546 if (memcmp (buf
, elfmagic
, sizeof (elfmagic
)) == 0
2547 || memcmp (buf
, coffmagic
, sizeof (coffmagic
)) == 0
2548 || memcmp (buf
, coffmagic_x64
, sizeof (coffmagic_x64
)) == 0)
2550 for (i
= 0; i
< 4; i
++)
2551 if (memcmp (buf
, machomagic
[i
], sizeof (machomagic
[i
])) == 0)
2557 /* Generic version to scan the name list of the loaded program for
2558 the symbols g++ uses for static constructors and destructors. */
2561 scan_prog_file (const char *prog_name
, scanpass which_pass
,
2564 void (*int_handler
) (int);
2566 void (*quit_handler
) (int);
2568 char *real_nm_argv
[4];
2569 const char **nm_argv
= CONST_CAST2 (const char **, char**, real_nm_argv
);
2571 struct pex_obj
*pex
;
2578 if (which_pass
== PASS_SECOND
)
2581 /* LTO objects must be in a known format. This check prevents
2582 us from accepting an archive containing LTO objects, which
2583 gcc cannnot currently handle. */
2584 if (which_pass
== PASS_LTOINFO
&& !maybe_lto_object_file (prog_name
))
2587 /* If we do not have an `nm', complain. */
2588 if (nm_file_name
== 0)
2589 fatal_error ("cannot find 'nm'");
2591 nm_argv
[argc
++] = nm_file_name
;
2592 if (NM_FLAGS
[0] != '\0')
2593 nm_argv
[argc
++] = NM_FLAGS
;
2595 nm_argv
[argc
++] = prog_name
;
2596 nm_argv
[argc
++] = (char *) 0;
2598 /* Trace if needed. */
2601 const char **p_argv
;
2604 for (p_argv
= &nm_argv
[0]; (str
= *p_argv
) != (char *) 0; p_argv
++)
2605 fprintf (stderr
, " %s", str
);
2607 fprintf (stderr
, "\n");
2613 pex
= pex_init (PEX_USE_PIPES
, "collect2", NULL
);
2615 fatal_error ("pex_init failed: %m");
2617 errmsg
= pex_run (pex
, 0, nm_file_name
, real_nm_argv
, NULL
, HOST_BIT_BUCKET
,
2624 fatal_error ("%s: %m", _(errmsg
));
2627 fatal_error (errmsg
);
2630 int_handler
= (void (*) (int)) signal (SIGINT
, SIG_IGN
);
2632 quit_handler
= (void (*) (int)) signal (SIGQUIT
, SIG_IGN
);
2635 inf
= pex_read_output (pex
, 0);
2637 fatal_error ("can't open nm output: %m");
2641 if (which_pass
== PASS_LTOINFO
)
2642 fprintf (stderr
, "\nnm output with LTO info marker symbol.\n");
2644 fprintf (stderr
, "\nnm output with constructors/destructors.\n");
2647 /* Read each line of nm output. */
2648 while (fgets (buf
, sizeof buf
, inf
) != (char *) 0)
2654 fprintf (stderr
, "\t%s\n", buf
);
2656 if (which_pass
== PASS_LTOINFO
)
2661 /* Look for the LTO info marker symbol, and add filename to
2662 the LTO objects list if found. */
2663 for (p
= buf
; (ch
= *p
) != '\0' && ch
!= '\n'; p
++)
2664 if (ch
== ' ' && p
[1] == '_' && p
[2] == '_'
2665 && (strncmp (p
+ (p
[3] == '_' ? 2 : 1), "__gnu_lto_v1", 12) == 0)
2666 && ISSPACE (p
[p
[3] == '_' ? 14 : 13]))
2668 add_lto_object (<o_objects
, prog_name
);
2670 /* We need to read all the input, so we can't just
2671 return here. But we can avoid useless work. */
2680 /* If it contains a constructor or destructor name, add the name
2681 to the appropriate list unless this is a kind of symbol we're
2682 not supposed to even consider. */
2684 for (p
= buf
; (ch
= *p
) != '\0' && ch
!= '\n' && ch
!= '_'; p
++)
2685 if (ch
== ' ' && p
[1] == 'U' && p
[2] == ' ')
2692 /* Find the end of the symbol name.
2693 Do not include `|', because Encore nm can tack that on the end. */
2694 for (end
= p
; (ch2
= *end
) != '\0' && !ISSPACE (ch2
) && ch2
!= '|';
2700 switch (is_ctor_dtor (name
))
2703 if (! (filter
& SCAN_CTOR
))
2705 if (which_pass
!= PASS_LIB
)
2706 add_to_list (&constructors
, name
);
2710 if (! (filter
& SCAN_DTOR
))
2712 if (which_pass
!= PASS_LIB
)
2713 add_to_list (&destructors
, name
);
2717 if (! (filter
& SCAN_INIT
))
2719 if (which_pass
!= PASS_LIB
)
2720 fatal_error ("init function found in object %s", prog_name
);
2721 #ifndef LD_INIT_SWITCH
2722 add_to_list (&constructors
, name
);
2727 if (! (filter
& SCAN_FINI
))
2729 if (which_pass
!= PASS_LIB
)
2730 fatal_error ("fini function found in object %s", prog_name
);
2731 #ifndef LD_FINI_SWITCH
2732 add_to_list (&destructors
, name
);
2737 if (! (filter
& SCAN_DWEH
))
2739 if (which_pass
!= PASS_LIB
)
2740 add_to_list (&frame_tables
, name
);
2743 default: /* not a constructor or destructor */
2749 fprintf (stderr
, "\n");
2751 do_wait (nm_file_name
, pex
);
2753 signal (SIGINT
, int_handler
);
2755 signal (SIGQUIT
, quit_handler
);
2761 /* Use the List Dynamic Dependencies program to find shared libraries that
2762 the output file depends upon and their initialization/finalization
2763 routines, if any. */
2766 scan_libraries (const char *prog_name
)
2768 static struct head libraries
; /* list of shared libraries found */
2770 void (*int_handler
) (int);
2772 void (*quit_handler
) (int);
2774 char *real_ldd_argv
[4];
2775 const char **ldd_argv
= CONST_CAST2 (const char **, char **, real_ldd_argv
);
2777 struct pex_obj
*pex
;
2783 /* If we do not have an `ldd', complain. */
2784 if (ldd_file_name
== 0)
2786 error ("cannot find 'ldd'");
2790 ldd_argv
[argc
++] = ldd_file_name
;
2791 ldd_argv
[argc
++] = prog_name
;
2792 ldd_argv
[argc
++] = (char *) 0;
2794 /* Trace if needed. */
2797 const char **p_argv
;
2800 for (p_argv
= &ldd_argv
[0]; (str
= *p_argv
) != (char *) 0; p_argv
++)
2801 fprintf (stderr
, " %s", str
);
2803 fprintf (stderr
, "\n");
2809 pex
= pex_init (PEX_USE_PIPES
, "collect2", NULL
);
2811 fatal_error ("pex_init failed: %m");
2813 errmsg
= pex_run (pex
, 0, ldd_file_name
, real_ldd_argv
, NULL
, NULL
, &err
);
2819 fatal_error ("%s: %m", _(errmsg
));
2822 fatal_error (errmsg
);
2825 int_handler
= (void (*) (int)) signal (SIGINT
, SIG_IGN
);
2827 quit_handler
= (void (*) (int)) signal (SIGQUIT
, SIG_IGN
);
2830 inf
= pex_read_output (pex
, 0);
2832 fatal_error ("can't open ldd output: %m");
2835 notice ("\nldd output with constructors/destructors.\n");
2837 /* Read each line of ldd output. */
2838 while (fgets (buf
, sizeof buf
, inf
) != (char *) 0)
2841 char *name
, *end
, *p
= buf
;
2843 /* Extract names of libraries and add to list. */
2844 PARSE_LDD_OUTPUT (p
);
2849 if (strncmp (name
, "not found", sizeof ("not found") - 1) == 0)
2850 fatal_error ("dynamic dependency %s not found", buf
);
2852 /* Find the end of the symbol name. */
2854 (ch2
= *end
) != '\0' && ch2
!= '\n' && !ISSPACE (ch2
) && ch2
!= '|';
2859 if (access (name
, R_OK
) == 0)
2860 add_to_list (&libraries
, name
);
2862 fatal_error ("unable to open dynamic dependency '%s'", buf
);
2865 fprintf (stderr
, "\t%s\n", buf
);
2868 fprintf (stderr
, "\n");
2870 do_wait (ldd_file_name
, pex
);
2872 signal (SIGINT
, int_handler
);
2874 signal (SIGQUIT
, quit_handler
);
2877 /* Now iterate through the library list adding their symbols to
2879 for (list
= libraries
.first
; list
; list
= list
->next
)
2880 scan_prog_file (list
->name
, PASS_LIB
, SCAN_ALL
);
2883 #endif /* LDD_SUFFIX */
2885 #endif /* OBJECT_FORMAT_NONE */
2889 * COFF specific stuff.
2892 #ifdef OBJECT_FORMAT_COFF
2894 #if defined (EXTENDED_COFF)
2896 # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax)
2897 # define GCC_SYMENT SYMR
2898 # define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal)
2899 # define GCC_SYMINC(X) (1)
2900 # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax)
2901 # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0)
2905 # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms)
2906 # define GCC_SYMENT SYMENT
2907 # if defined (C_WEAKEXT)
2908 # define GCC_OK_SYMBOL(X) \
2909 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2910 ((X).n_scnum > N_UNDEF) && \
2912 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2913 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2914 # define GCC_UNDEF_SYMBOL(X) \
2915 (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \
2916 ((X).n_scnum == N_UNDEF))
2918 # define GCC_OK_SYMBOL(X) \
2919 (((X).n_sclass == C_EXT) && \
2920 ((X).n_scnum > N_UNDEF) && \
2922 || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \
2923 || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT))))
2924 # define GCC_UNDEF_SYMBOL(X) \
2925 (((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF))
2927 # define GCC_SYMINC(X) ((X).n_numaux+1)
2928 # define GCC_SYMZERO(X) 0
2930 /* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */
2931 #if TARGET_AIX_VERSION >= 51
2932 # define GCC_CHECK_HDR(X) \
2933 (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2934 || (HEADER (X).f_magic == 0767 && aix64_flag)) \
2935 && !(HEADER (X).f_flags & F_LOADONLY))
2937 # define GCC_CHECK_HDR(X) \
2938 (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \
2939 || (HEADER (X).f_magic == 0757 && aix64_flag)) \
2940 && !(HEADER (X).f_flags & F_LOADONLY))
2945 #ifdef COLLECT_EXPORT_LIST
2946 /* Array of standard AIX libraries which should not
2947 be scanned for ctors/dtors. */
2948 static const char *const aix_std_libs
[] = {
2956 "/usr/lib/libc_r.a",
2957 "/usr/lib/libm_r.a",
2958 "/usr/lib/threads/libc.a",
2959 "/usr/ccs/lib/libc.a",
2960 "/usr/ccs/lib/libm.a",
2961 "/usr/ccs/lib/libc_r.a",
2962 "/usr/ccs/lib/libm_r.a",
2966 /* This function checks the filename and returns 1
2967 if this name matches the location of a standard AIX library. */
2968 static int ignore_library (const char *);
2970 ignore_library (const char *name
)
2972 const char *const *p
;
2975 if (target_system_root
[0] != '\0')
2977 length
= strlen (target_system_root
);
2978 if (strncmp (name
, target_system_root
, length
) != 0)
2982 for (p
= &aix_std_libs
[0]; *p
!= NULL
; ++p
)
2983 if (strcmp (name
, *p
) == 0)
2987 #endif /* COLLECT_EXPORT_LIST */
2989 #if defined (HAVE_DECL_LDGETNAME) && !HAVE_DECL_LDGETNAME
2990 extern char *ldgetname (LDFILE
*, GCC_SYMENT
*);
2993 /* COFF version to scan the name list of the loaded program for
2994 the symbols g++ uses for static constructors and destructors. */
2997 scan_prog_file (const char *prog_name
, scanpass which_pass
,
3000 LDFILE
*ldptr
= NULL
;
3001 int sym_index
, sym_count
;
3004 if (which_pass
!= PASS_FIRST
&& which_pass
!= PASS_OBJ
)
3007 #ifdef COLLECT_EXPORT_LIST
3008 /* We do not need scanning for some standard C libraries. */
3009 if (which_pass
== PASS_FIRST
&& ignore_library (prog_name
))
3012 /* On AIX we have a loop, because there is not much difference
3013 between an object and an archive. This trick allows us to
3014 eliminate scan_libraries() function. */
3018 /* Some platforms (e.g. OSF4) declare ldopen as taking a
3019 non-const char * filename parameter, even though it will not
3020 modify that string. So we must cast away const-ness here,
3021 using CONST_CAST to prevent complaints from -Wcast-qual. */
3022 if ((ldptr
= ldopen (CONST_CAST (char *, prog_name
), ldptr
)) != NULL
)
3024 if (! MY_ISCOFF (HEADER (ldptr
).f_magic
))
3025 fatal_error ("%s: not a COFF file", prog_name
);
3027 if (GCC_CHECK_HDR (ldptr
))
3029 sym_count
= GCC_SYMBOLS (ldptr
);
3030 sym_index
= GCC_SYMZERO (ldptr
);
3032 #ifdef COLLECT_EXPORT_LIST
3033 /* Is current archive member a shared object? */
3034 is_shared
= HEADER (ldptr
).f_flags
& F_SHROBJ
;
3037 while (sym_index
< sym_count
)
3041 if (ldtbread (ldptr
, sym_index
, &symbol
) <= 0)
3043 sym_index
+= GCC_SYMINC (symbol
);
3045 if (GCC_OK_SYMBOL (symbol
))
3049 if ((name
= ldgetname (ldptr
, &symbol
)) == NULL
)
3050 continue; /* Should never happen. */
3052 #ifdef XCOFF_DEBUGGING_INFO
3053 /* All AIX function names have a duplicate entry
3054 beginning with a dot. */
3059 switch (is_ctor_dtor (name
))
3062 if (! (filter
& SCAN_CTOR
))
3065 add_to_list (&constructors
, name
);
3066 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3067 if (which_pass
== PASS_OBJ
)
3068 add_to_list (&exports
, name
);
3073 if (! (filter
& SCAN_DTOR
))
3076 add_to_list (&destructors
, name
);
3077 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3078 if (which_pass
== PASS_OBJ
)
3079 add_to_list (&exports
, name
);
3083 #ifdef COLLECT_EXPORT_LIST
3085 if (! (filter
& SCAN_INIT
))
3087 #ifndef LD_INIT_SWITCH
3089 add_to_list (&constructors
, name
);
3094 if (! (filter
& SCAN_FINI
))
3096 #ifndef LD_INIT_SWITCH
3098 add_to_list (&destructors
, name
);
3104 if (! (filter
& SCAN_DWEH
))
3107 add_to_list (&frame_tables
, name
);
3108 #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH)
3109 if (which_pass
== PASS_OBJ
)
3110 add_to_list (&exports
, name
);
3114 default: /* not a constructor or destructor */
3115 #ifdef COLLECT_EXPORT_LIST
3116 /* Explicitly export all global symbols when
3117 building a shared object on AIX, but do not
3118 re-export symbols from another shared object
3119 and do not export symbols if the user
3120 provides an explicit export list. */
3121 if (shared_obj
&& !is_shared
3122 && which_pass
== PASS_OBJ
&& !export_flag
)
3123 add_to_list (&exports
, name
);
3129 #if !defined(EXTENDED_COFF)
3130 fprintf (stderr
, "\tsec=%d class=%d type=%s%o %s\n",
3131 symbol
.n_scnum
, symbol
.n_sclass
,
3132 (symbol
.n_type
? "0" : ""), symbol
.n_type
,
3136 "\tiss = %5d, value = %5ld, index = %5d, name = %s\n",
3137 symbol
.iss
, (long) symbol
.value
, symbol
.index
, name
);
3142 #ifdef COLLECT_EXPORT_LIST
3145 /* If archive contains both 32-bit and 64-bit objects,
3146 we want to skip objects in other mode so mismatch normal. */
3148 fprintf (stderr
, "%s : magic=%o aix64=%d mismatch\n",
3149 prog_name
, HEADER (ldptr
).f_magic
, aix64_flag
);
3155 fatal_error ("%s: cannot open as COFF file", prog_name
);
3157 #ifdef COLLECT_EXPORT_LIST
3158 /* On AIX loop continues while there are more members in archive. */
3160 while (ldclose (ldptr
) == FAILURE
);
3162 /* Otherwise we simply close ldptr. */
3163 (void) ldclose(ldptr
);
3166 #endif /* OBJECT_FORMAT_COFF */
3168 #ifdef COLLECT_EXPORT_LIST
3169 /* Given a library name without "lib" prefix, this function
3170 returns a full library name including a path. */
3172 resolve_lib_name (const char *name
)
3176 /* Library extensions for AIX dynamic linking. */
3177 const char * const libexts
[2] = {"a", "so"};
3179 for (i
= 0; libpaths
[i
]; i
++)
3180 if (libpaths
[i
]->max_len
> l
)
3181 l
= libpaths
[i
]->max_len
;
3183 lib_buf
= XNEWVEC (char, l
+ strlen(name
) + 10);
3185 for (i
= 0; libpaths
[i
]; i
++)
3187 struct prefix_list
*list
= libpaths
[i
]->plist
;
3188 for (; list
; list
= list
->next
)
3190 /* The following lines are needed because path_prefix list
3191 may contain directories both with trailing DIR_SEPARATOR and
3194 if (!IS_DIR_SEPARATOR (list
->prefix
[strlen(list
->prefix
)-1]))
3196 for (j
= 0; j
< 2; j
++)
3198 sprintf (lib_buf
, "%s%slib%s.%s",
3199 list
->prefix
, p
, name
,
3200 libexts
[(j
+ aixrtl_flag
) % 2]);
3201 if (debug
) fprintf (stderr
, "searching for: %s\n", lib_buf
);
3202 if (file_exists (lib_buf
))
3204 if (debug
) fprintf (stderr
, "found: %s\n", lib_buf
);
3211 fprintf (stderr
, "not found\n");
3213 fatal_error ("library lib%s not found", name
);
3216 #endif /* COLLECT_EXPORT_LIST */
3218 #ifdef COLLECT_RUN_DSYMUTIL
3219 static int flag_dsym
= false;
3220 static int flag_idsym
= false;
3223 process_args (int *argcp
, char **argv
) {
3226 for (i
=0; i
<argc
; ++i
)
3228 if (strcmp (argv
[i
], "-dsym") == 0)
3231 /* Remove the flag, as we handle all processing for it. */
3234 argv
[j
] = argv
[j
+1];
3239 else if (strcmp (argv
[i
], "-idsym") == 0)
3242 /* Remove the flag, as we handle all processing for it. */
3245 argv
[j
] = argv
[j
+1];
3254 do_dsymutil (const char *output_file
) {
3255 const char *dsymutil
= DSYMUTIL
+ 1;
3256 struct pex_obj
*pex
;
3257 char **real_argv
= XCNEWVEC (char *, 3);
3258 const char ** argv
= CONST_CAST2 (const char **, char **,
3262 argv
[1] = output_file
;
3263 argv
[2] = (char *) 0;
3265 pex
= collect_execute (dsymutil
, real_argv
, NULL
, NULL
, PEX_LAST
| PEX_SEARCH
);
3266 do_wait (dsymutil
, pex
);
3270 post_ld_pass (bool temp_file
) {
3271 if (!(temp_file
&& flag_idsym
) && !flag_dsym
)
3274 do_dsymutil (output_file
);
3278 process_args (int *argcp ATTRIBUTE_UNUSED
, char **argv ATTRIBUTE_UNUSED
) { }
3279 static void post_ld_pass (bool temp_file ATTRIBUTE_UNUSED
) { }