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/* Collect static initialization info into data structures that can be traversed by C++ initialization and finalization routines. Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc. Contributed by Chris Smith (csmith@convex.com). Heavily modified by Michael Meissner (meissner@cygnus.com), Per Bothner (bothner@cygnus.com), and John Gilmore (gnu@cygnus.com). This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ /* Build tables of static constructors and destructors and run ld. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include <signal.h> #if ! defined( SIGCHLD ) && defined( SIGCLD ) # define SIGCHLD SIGCLD #endif #ifndef LIBRARY_PATH_ENV #define LIBRARY_PATH_ENV "LIBRARY_PATH" #endif #define COLLECT #include "collect2.h" #include "demangle.h" #include "obstack.h" #include "intl.h" #include "version.h" /* On certain systems, we have code that works by scanning the object file directly. But this code uses system-specific header files and library functions, so turn it off in a cross-compiler. Likewise, the names of the utilities are not correct for a cross-compiler; we have to hope that cross-versions are in the proper directories. */ #ifdef CROSS_COMPILE #undef OBJECT_FORMAT_COFF #undef MD_EXEC_PREFIX #undef REAL_LD_FILE_NAME #undef REAL_NM_FILE_NAME #undef REAL_STRIP_FILE_NAME #endif /* If we cannot use a special method, use the ordinary one: run nm to find what symbols are present. In a cross-compiler, this means you need a cross nm, but that is not quite as unpleasant as special headers. */ #if !defined (OBJECT_FORMAT_COFF) #define OBJECT_FORMAT_NONE #endif #ifdef OBJECT_FORMAT_COFF #include <a.out.h> #include <ar.h> #ifdef UMAX #include <sgs.h> #endif /* Many versions of ldfcn.h define these. */ #ifdef FREAD #undef FREAD #undef FWRITE #endif #include <ldfcn.h> /* Some systems have an ISCOFF macro, but others do not. In some cases the macro may be wrong. MY_ISCOFF is defined in tm.h files for machines that either do not have an ISCOFF macro in /usr/include or for those where it is wrong. */ #ifndef MY_ISCOFF #define MY_ISCOFF(X) ISCOFF (X) #endif #endif /* OBJECT_FORMAT_COFF */ #ifdef OBJECT_FORMAT_NONE /* Default flags to pass to nm. */ #ifndef NM_FLAGS #define NM_FLAGS "-n" #endif #endif /* OBJECT_FORMAT_NONE */ /* Some systems use __main in a way incompatible with its use in gcc, in these cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to give the same symbol without quotes for an alternative entry point. */ #ifndef NAME__MAIN #define NAME__MAIN "__main" #endif /* This must match tree.h. */ #define DEFAULT_INIT_PRIORITY 65535 #ifndef COLLECT_SHARED_INIT_FUNC #define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \ fprintf ((STREAM), "void _GLOBAL__DI() {\n\t%s();\n}\n", (FUNC)) #endif #ifndef COLLECT_SHARED_FINI_FUNC #define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \ fprintf ((STREAM), "void _GLOBAL__DD() {\n\t%s();\n}\n", (FUNC)) #endif #ifdef LDD_SUFFIX #define SCAN_LIBRARIES #endif #ifdef USE_COLLECT2 int do_collecting = 1; #else int do_collecting = 0; #endif /* Nonzero if we should suppress the automatic demangling of identifiers in linker error messages. Set from COLLECT_NO_DEMANGLE. */ int no_demangle; /* Linked lists of constructor and destructor names. */ struct id { struct id *next; int sequence; char name[1]; }; struct head { struct id *first; struct id *last; int number; }; /* Enumeration giving which pass this is for scanning the program file. */ enum pass { PASS_FIRST, /* without constructors */ PASS_OBJ, /* individual objects */ PASS_LIB, /* looking for shared libraries */ PASS_SECOND /* with constructors linked in */ }; int vflag; /* true if -v */ static int rflag; /* true if -r */ static int strip_flag; /* true if -s */ static const char *demangle_flag; #ifdef COLLECT_EXPORT_LIST static int export_flag; /* true if -bE */ static int aix64_flag; /* true if -b64 */ static int aixrtl_flag; /* true if -brtl */ #endif int debug; /* true if -debug */ static int shared_obj; /* true if -shared */ static const char *c_file; /* <xxx>.c for constructor/destructor list. */ static const char *o_file; /* <xxx>.o for constructor/destructor list. */ #ifdef COLLECT_EXPORT_LIST static const char *export_file; /* <xxx>.x for AIX export list. */ #endif const char *ldout; /* File for ld stdout. */ const char *lderrout; /* File for ld stderr. */ static const char *output_file; /* Output file for ld. */ static const char *nm_file_name; /* pathname of nm */ #ifdef LDD_SUFFIX static const char *ldd_file_name; /* pathname of ldd (or equivalent) */ #endif static const char *strip_file_name; /* pathname of strip */ const char *c_file_name; /* pathname of gcc */ static char *initname, *fininame; /* names of init and fini funcs */ static struct head constructors; /* list of constructors found */ static struct head destructors; /* list of destructors found */ #ifdef COLLECT_EXPORT_LIST static struct head exports; /* list of exported symbols */ #endif static struct head frame_tables; /* list of frame unwind info tables */ struct obstack temporary_obstack; char * temporary_firstobj; /* Structure to hold all the directories in which to search for files to execute. */ struct prefix_list { const char *prefix; /* String to prepend to the path. */ struct prefix_list *next; /* Next in linked list. */ }; struct path_prefix { struct prefix_list *plist; /* List of prefixes to try */ int max_len; /* Max length of a prefix in PLIST */ const char *name; /* Name of this list (used in config stuff) */ }; #ifdef COLLECT_EXPORT_LIST /* Lists to keep libraries to be scanned for global constructors/destructors. */ static struct head libs; /* list of libraries */ static struct path_prefix cmdline_lib_dirs; /* directories specified with -L */ static struct path_prefix libpath_lib_dirs; /* directories in LIBPATH */ static struct path_prefix *libpaths[3] = {&cmdline_lib_dirs, &libpath_lib_dirs, NULL}; #endif static void handler (int); static int is_ctor_dtor (const char *); static char *find_a_file (struct path_prefix *, const char *); static void add_prefix (struct path_prefix *, const char *); static void prefix_from_env (const char *, struct path_prefix *); static void prefix_from_string (const char *, struct path_prefix *); static void do_wait (const char *, struct pex_obj *); static void fork_execute (const char *, char **); static void maybe_unlink (const char *); static void add_to_list (struct head *, const char *); static int extract_init_priority (const char *); static void sort_ids (struct head *); static void write_list (FILE *, const char *, struct id *); #ifdef COLLECT_EXPORT_LIST static void dump_list (FILE *, const char *, struct id *); #endif #if 0 static void dump_prefix_list (FILE *, const char *, struct prefix_list *); #endif static void write_list_with_asm (FILE *, const char *, struct id *); static void write_c_file (FILE *, const char *); static void write_c_file_stat (FILE *, const char *); #ifndef LD_INIT_SWITCH static void write_c_file_glob (FILE *, const char *); #endif static void scan_prog_file (const char *, enum pass); #ifdef SCAN_LIBRARIES static void scan_libraries (const char *); #endif #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES static int is_in_args (const char *, const char **, const char **); #endif #ifdef COLLECT_EXPORT_LIST #if 0 static int is_in_list (const char *, struct id *); #endif static void write_aix_file (FILE *, struct id *); static char *resolve_lib_name (const char *); #endif static char *extract_string (const char **); /* Delete tempfiles and exit function. */ void collect_exit (int status) { if (c_file != 0 && c_file[0]) maybe_unlink (c_file); if (o_file != 0 && o_file[0]) maybe_unlink (o_file); #ifdef COLLECT_EXPORT_LIST if (export_file != 0 && export_file[0]) maybe_unlink (export_file); #endif if (ldout != 0 && ldout[0]) { dump_file (ldout, stdout); maybe_unlink (ldout); } if (lderrout != 0 && lderrout[0]) { dump_file (lderrout, stderr); maybe_unlink (lderrout); } if (status != 0 && output_file != 0 && output_file[0]) maybe_unlink (output_file); exit (status); } /* Notify user of a non-error. */ void notice (const char *cmsgid, ...) { va_list ap; va_start (ap, cmsgid); vfprintf (stderr, _(cmsgid), ap); va_end (ap); } /* Die when sys call fails. */ void fatal_perror (const char * cmsgid, ...) { int e = errno; va_list ap; va_start (ap, cmsgid); fprintf (stderr, "collect2: "); vfprintf (stderr, _(cmsgid), ap); fprintf (stderr, ": %s\n", xstrerror (e)); va_end (ap); collect_exit (FATAL_EXIT_CODE); } /* Just die. */ void fatal (const char * cmsgid, ...) { va_list ap; va_start (ap, cmsgid); fprintf (stderr, "collect2: "); vfprintf (stderr, _(cmsgid), ap); fprintf (stderr, "\n"); va_end (ap); collect_exit (FATAL_EXIT_CODE); } /* Write error message. */ void error (const char * gmsgid, ...) { va_list ap; va_start (ap, gmsgid); fprintf (stderr, "collect2: "); vfprintf (stderr, _(gmsgid), ap); fprintf (stderr, "\n"); va_end(ap); } /* In case obstack is linked in, and abort is defined to fancy_abort, provide a default entry. */ void fancy_abort (const char *file, int line, const char *func) { fatal ("internal gcc abort in %s, at %s:%d", func, file, line); } static void handler (int signo) { if (c_file != 0 && c_file[0]) maybe_unlink (c_file); if (o_file != 0 && o_file[0]) maybe_unlink (o_file); if (ldout != 0 && ldout[0]) maybe_unlink (ldout); if (lderrout != 0 && lderrout[0]) maybe_unlink (lderrout); #ifdef COLLECT_EXPORT_LIST if (export_file != 0 && export_file[0]) maybe_unlink (export_file); #endif signal (signo, SIG_DFL); raise (signo); } int file_exists (const char *name) { return access (name, R_OK) == 0; } /* Parse a reasonable subset of shell quoting syntax. */ static char * extract_string (const char **pp) { const char *p = *pp; int backquote = 0; int inside = 0; for (;;) { char c = *p; if (c == '\0') break; ++p; if (backquote) obstack_1grow (&temporary_obstack, c); else if (! inside && c == ' ') break; else if (! inside && c == '\\') backquote = 1; else if (c == '\'') inside = !inside; else obstack_1grow (&temporary_obstack, c); } obstack_1grow (&temporary_obstack, '\0'); *pp = p; return XOBFINISH (&temporary_obstack, char *); } void dump_file (const char *name, FILE *to) { FILE *stream = fopen (name, "r"); if (stream == 0) return; while (1) { int c; while (c = getc (stream), c != EOF && (ISIDNUM (c) || c == '$' || c == '.')) obstack_1grow (&temporary_obstack, c); if (obstack_object_size (&temporary_obstack) > 0) { const char *word, *p; char *result; obstack_1grow (&temporary_obstack, '\0'); word = XOBFINISH (&temporary_obstack, const char *); if (*word == '.') ++word, putc ('.', to); p = word; if (!strncmp (p, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX))) p += strlen (USER_LABEL_PREFIX); #ifdef HAVE_LD_DEMANGLE result = 0; #else if (no_demangle) result = 0; else result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE); #endif if (result) { int diff; fputs (result, to); diff = strlen (word) - strlen (result); while (diff > 0 && c == ' ') --diff, putc (' ', to); while (diff < 0 && c == ' ') ++diff, c = getc (stream); free (result); } else fputs (word, to); fflush (to); obstack_free (&temporary_obstack, temporary_firstobj); } if (c == EOF) break; putc (c, to); } fclose (stream); } /* Decide whether the given symbol is: a constructor (1), a destructor (2), a routine in a shared object that calls all the constructors (3) or destructors (4), a DWARF exception-handling table (5), or nothing special (0). */ static int is_ctor_dtor (const char *s) { struct names { const char *const name; const int len; const int ret; const int two_underscores; }; const struct names *p; int ch; const char *orig_s = s; static const struct names special[] = { #ifndef NO_DOLLAR_IN_LABEL { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, 1, 0 }, { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, 2, 0 }, #else #ifndef NO_DOT_IN_LABEL { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, 1, 0 }, { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, 2, 0 }, #endif /* NO_DOT_IN_LABEL */ #endif /* NO_DOLLAR_IN_LABEL */ { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, 1, 0 }, { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, 2, 0 }, { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, 5, 0 }, { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, 3, 0 }, { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, 4, 0 }, { NULL, 0, 0, 0 } }; while ((ch = *s) == '_') ++s; if (s == orig_s) return 0; for (p = &special[0]; p->len > 0; p++) { if (ch == p->name[0] && (!p->two_underscores || ((s - orig_s) >= 2)) && strncmp(s, p->name, p->len) == 0) { return p->ret; } } return 0; } /* We maintain two prefix lists: one from COMPILER_PATH environment variable and one from the PATH variable. */ static struct path_prefix cpath, path; #ifdef CROSS_COMPILE /* This is the name of the target machine. We use it to form the name of the files to execute. */ static const char *const target_machine = TARGET_MACHINE; #endif /* Search for NAME using prefix list PPREFIX. We only look for executable files. Return 0 if not found, otherwise return its name, allocated with malloc. */ static char * find_a_file (struct path_prefix *pprefix, const char *name) { char *temp; struct prefix_list *pl; int len = pprefix->max_len + strlen (name) + 1; if (debug) fprintf (stderr, "Looking for '%s'\n", name); #ifdef HOST_EXECUTABLE_SUFFIX len += strlen (HOST_EXECUTABLE_SUFFIX); #endif temp = XNEWVEC (char, len); /* Determine the filename to execute (special case for absolute paths). */ if (*name == '/' #ifdef HAVE_DOS_BASED_FILE_SYSTEM || (*name && name[1] == ':') #endif ) { if (access (name, X_OK) == 0) { strcpy (temp, name); if (debug) fprintf (stderr, " - found: absolute path\n"); return temp; } #ifdef HOST_EXECUTABLE_SUFFIX /* Some systems have a suffix for executable files. So try appending that. */ strcpy (temp, name); strcat (temp, HOST_EXECUTABLE_SUFFIX); if (access (temp, X_OK) == 0) return temp; #endif if (debug) fprintf (stderr, " - failed to locate using absolute path\n"); } else for (pl = pprefix->plist; pl; pl = pl->next) { struct stat st; strcpy (temp, pl->prefix); strcat (temp, name); if (stat (temp, &st) >= 0 && ! S_ISDIR (st.st_mode) && access (temp, X_OK) == 0) return temp; #ifdef HOST_EXECUTABLE_SUFFIX /* Some systems have a suffix for executable files. So try appending that. */ strcat (temp, HOST_EXECUTABLE_SUFFIX); if (stat (temp, &st) >= 0 && ! S_ISDIR (st.st_mode) && access (temp, X_OK) == 0) return temp; #endif } if (debug && pprefix->plist == NULL) fprintf (stderr, " - failed: no entries in prefix list\n"); free (temp); return 0; } /* Add an entry for PREFIX to prefix list PPREFIX. */ static void add_prefix (struct path_prefix *pprefix, const char *prefix) { struct prefix_list *pl, **prev; int len; if (pprefix->plist) { for (pl = pprefix->plist; pl->next; pl = pl->next) ; prev = &pl->next; } else prev = &pprefix->plist; /* Keep track of the longest prefix. */ len = strlen (prefix); if (len > pprefix->max_len) pprefix->max_len = len; pl = XNEW (struct prefix_list); pl->prefix = xstrdup (prefix); if (*prev) pl->next = *prev; else pl->next = (struct prefix_list *) 0; *prev = pl; } /* Take the value of the environment variable ENV, break it into a path, and add of the entries to PPREFIX. */ static void prefix_from_env (const char *env, struct path_prefix *pprefix) { const char *p; GET_ENVIRONMENT (p, env); if (p) prefix_from_string (p, pprefix); } static void prefix_from_string (const char *p, struct path_prefix *pprefix) { const char *startp, *endp; char *nstore = XNEWVEC (char, strlen (p) + 3); if (debug) fprintf (stderr, "Convert string '%s' into prefixes, separator = '%c'\n", p, PATH_SEPARATOR); startp = endp = p; while (1) { if (*endp == PATH_SEPARATOR || *endp == 0) { strncpy (nstore, startp, endp-startp); if (endp == startp) { strcpy (nstore, "./"); } else if (! IS_DIR_SEPARATOR (endp[-1])) { nstore[endp-startp] = DIR_SEPARATOR; nstore[endp-startp+1] = 0; } else nstore[endp-startp] = 0; if (debug) fprintf (stderr, " - add prefix: %s\n", nstore); add_prefix (pprefix, nstore); if (*endp == 0) break; endp = startp = endp + 1; } else endp++; } } /* Main program. */ int main (int argc, char **argv) { static const char *const ld_suffix = "ld"; static const char *const real_ld_suffix = "real-ld"; static const char *const collect_ld_suffix = "collect-ld"; static const char *const nm_suffix = "nm"; static const char *const gnm_suffix = "gnm"; #ifdef LDD_SUFFIX static const char *const ldd_suffix = LDD_SUFFIX; #endif static const char *const strip_suffix = "strip"; static const char *const gstrip_suffix = "gstrip"; #ifdef CROSS_COMPILE /* If we look for a program in the compiler directories, we just use the short name, since these directories are already system-specific. But it we look for a program in the system directories, we need to qualify the program name with the target machine. */ const char *const full_ld_suffix = concat(target_machine, "-", ld_suffix, NULL); const char *const full_nm_suffix = concat (target_machine, "-", nm_suffix, NULL); const char *const full_gnm_suffix = concat (target_machine, "-", gnm_suffix, NULL); #ifdef LDD_SUFFIX const char *const full_ldd_suffix = concat (target_machine, "-", ldd_suffix, NULL); #endif const char *const full_strip_suffix = concat (target_machine, "-", strip_suffix, NULL); const char *const full_gstrip_suffix = concat (target_machine, "-", gstrip_suffix, NULL); #else const char *const full_ld_suffix = ld_suffix; const char *const full_nm_suffix = nm_suffix; const char *const full_gnm_suffix = gnm_suffix; #ifdef LDD_SUFFIX const char *const full_ldd_suffix = ldd_suffix; #endif const char *const full_strip_suffix = strip_suffix; const char *const full_gstrip_suffix = gstrip_suffix; #endif /* CROSS_COMPILE */ const char *arg; FILE *outf; #ifdef COLLECT_EXPORT_LIST FILE *exportf; #endif const char *ld_file_name; const char *p; char **c_argv; const char **c_ptr; char **ld1_argv; const char **ld1; char **ld2_argv; const char **ld2; char **object_lst; const char **object; int first_file; int num_c_args = argc+9; no_demangle = !! getenv ("COLLECT_NO_DEMANGLE"); /* Suppress demangling by the real linker, which may be broken. */ putenv (xstrdup ("COLLECT_NO_DEMANGLE=")); #if defined (COLLECT2_HOST_INITIALIZATION) /* Perform system dependent initialization, if necessary. */ COLLECT2_HOST_INITIALIZATION; #endif #ifdef SIGCHLD /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will receive the signal. A different setting is inheritable */ signal (SIGCHLD, SIG_DFL); #endif /* Unlock the stdio streams. */ unlock_std_streams (); gcc_init_libintl (); /* Do not invoke xcalloc before this point, since locale needs to be set first, in case a diagnostic is issued. */ ld1 = (const char **)(ld1_argv = xcalloc(sizeof (char *), argc+4)); ld2 = (const char **)(ld2_argv = xcalloc(sizeof (char *), argc+11)); object = (const char **)(object_lst = xcalloc(sizeof (char *), argc)); #ifdef DEBUG debug = 1; #endif /* Parse command line early for instances of -debug. This allows the debug flag to be set before functions like find_a_file() are called. */ { int i; for (i = 1; argv[i] != NULL; i ++) { if (! strcmp (argv[i], "-debug")) debug = 1; } vflag = debug; } #ifndef DEFAULT_A_OUT_NAME output_file = "a.out"; #else output_file = DEFAULT_A_OUT_NAME; #endif obstack_begin (&temporary_obstack, 0); temporary_firstobj = obstack_alloc (&temporary_obstack, 0); #ifndef HAVE_LD_DEMANGLE current_demangling_style = auto_demangling; #endif p = getenv ("COLLECT_GCC_OPTIONS"); while (p && *p) { const char *q = extract_string (&p); if (*q == '-' && (q[1] == 'm' || q[1] == 'f')) num_c_args++; } obstack_free (&temporary_obstack, temporary_firstobj); /* -fno-profile-arcs -fno-test-coverage -fno-branch-probabilities -fno-exceptions -w */ num_c_args += 5; c_ptr = (const char **) (c_argv = xcalloc (sizeof (char *), num_c_args)); if (argc < 2) fatal ("no arguments"); #ifdef SIGQUIT if (signal (SIGQUIT, SIG_IGN) != SIG_IGN) signal (SIGQUIT, handler); #endif if (signal (SIGINT, SIG_IGN) != SIG_IGN) signal (SIGINT, handler); #ifdef SIGALRM if (signal (SIGALRM, SIG_IGN) != SIG_IGN) signal (SIGALRM, handler); #endif #ifdef SIGHUP if (signal (SIGHUP, SIG_IGN) != SIG_IGN) signal (SIGHUP, handler); #endif if (signal (SIGSEGV, SIG_IGN) != SIG_IGN) signal (SIGSEGV, handler); #ifdef SIGBUS if (signal (SIGBUS, SIG_IGN) != SIG_IGN) signal (SIGBUS, handler); #endif /* Extract COMPILER_PATH and PATH into our prefix list. */ prefix_from_env ("COMPILER_PATH", &cpath); prefix_from_env ("PATH", &path); /* Try to discover a valid linker/nm/strip to use. */ /* Maybe we know the right file to use (if not cross). */ ld_file_name = 0; #ifdef DEFAULT_LINKER if (access (DEFAULT_LINKER, X_OK) == 0) ld_file_name = DEFAULT_LINKER; if (ld_file_name == 0) #endif #ifdef REAL_LD_FILE_NAME ld_file_name = find_a_file (&path, REAL_LD_FILE_NAME); if (ld_file_name == 0) #endif /* Search the (target-specific) compiler dirs for ld'. */ ld_file_name = find_a_file (&cpath, real_ld_suffix); /* Likewise for `collect-ld'. */ if (ld_file_name == 0) ld_file_name = find_a_file (&cpath, collect_ld_suffix); /* Search the compiler directories for `ld'. We have protection against recursive calls in find_a_file. */ if (ld_file_name == 0) ld_file_name = find_a_file (&cpath, ld_suffix); /* Search the ordinary system bin directories for `ld' (if native linking) or `TARGET-ld' (if cross). */ if (ld_file_name == 0) ld_file_name = find_a_file (&path, full_ld_suffix); #ifdef REAL_NM_FILE_NAME nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME); if (nm_file_name == 0) #endif nm_file_name = find_a_file (&cpath, gnm_suffix); if (nm_file_name == 0) nm_file_name = find_a_file (&path, full_gnm_suffix); if (nm_file_name == 0) nm_file_name = find_a_file (&cpath, nm_suffix); if (nm_file_name == 0) nm_file_name = find_a_file (&path, full_nm_suffix); #ifdef LDD_SUFFIX ldd_file_name = find_a_file (&cpath, ldd_suffix); if (ldd_file_name == 0) ldd_file_name = find_a_file (&path, full_ldd_suffix); #endif #ifdef REAL_STRIP_FILE_NAME strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME); if (strip_file_name == 0) #endif strip_file_name = find_a_file (&cpath, gstrip_suffix); if (strip_file_name == 0) strip_file_name = find_a_file (&path, full_gstrip_suffix); if (strip_file_name == 0) strip_file_name = find_a_file (&cpath, strip_suffix); if (strip_file_name == 0) strip_file_name = find_a_file (&path, full_strip_suffix); /* Determine the full path name of the C compiler to use. */ c_file_name = getenv ("COLLECT_GCC"); if (c_file_name == 0) { #ifdef CROSS_COMPILE c_file_name = concat (target_machine, "-gcc", NULL); #else c_file_name = "gcc"; #endif } p = find_a_file (&cpath, c_file_name); /* Here it should be safe to use the system search path since we should have already qualified the name of the compiler when it is needed. */ if (p == 0) p = find_a_file (&path, c_file_name); if (p) c_file_name = p; *ld1++ = *ld2++ = ld_file_name; /* Make temp file names. */ c_file = make_temp_file (".c"); o_file = make_temp_file (".o"); #ifdef COLLECT_EXPORT_LIST export_file = make_temp_file (".x"); #endif ldout = make_temp_file (".ld"); lderrout = make_temp_file (".le"); *c_ptr++ = c_file_name; *c_ptr++ = "-x"; *c_ptr++ = "c"; *c_ptr++ = "-c"; *c_ptr++ = "-o"; *c_ptr++ = o_file; #ifdef COLLECT_EXPORT_LIST /* Generate a list of directories from LIBPATH. */ prefix_from_env ("LIBPATH", &libpath_lib_dirs); /* Add to this list also two standard directories where AIX loader always searches for libraries. */ add_prefix (&libpath_lib_dirs, "/lib"); add_prefix (&libpath_lib_dirs, "/usr/lib"); #endif /* Get any options that the upper GCC wants to pass to the sub-GCC. AIX support needs to know if -shared has been specified before parsing commandline arguments. */ p = getenv ("COLLECT_GCC_OPTIONS"); while (p && *p) { const char *q = extract_string (&p); if (*q == '-' && (q[1] == 'm' || q[1] == 'f')) *c_ptr++ = xstrdup (q); if (strcmp (q, "-EL") == 0 || strcmp (q, "-EB") == 0) *c_ptr++ = xstrdup (q); if (strcmp (q, "-shared") == 0) shared_obj = 1; if (*q == '-' && q[1] == 'B') { *c_ptr++ = xstrdup (q); if (q[2] == 0) { q = extract_string (&p); *c_ptr++ = xstrdup (q); } } } obstack_free (&temporary_obstack, temporary_firstobj); *c_ptr++ = "-fno-profile-arcs"; *c_ptr++ = "-fno-test-coverage"; *c_ptr++ = "-fno-branch-probabilities"; *c_ptr++ = "-fno-exceptions"; *c_ptr++ = "-w"; /* !!! When GCC calls collect2, it does not know whether it is calling collect2 or ld. So collect2 cannot meaningfully understand any options except those ld understands. If you propose to make GCC pass some other option, just imagine what will happen if ld is really ld!!! */ /* Parse arguments. Remember output file spec, pass the rest to ld. */ /* After the first file, put in the c++ rt0. */ first_file = 1; #ifdef HAVE_LD_DEMANGLE if (!demangle_flag && !no_demangle) demangle_flag = "--demangle"; if (demangle_flag) *ld1++ = *ld2++ = demangle_flag; #endif while ((arg = *++argv) != (char *) 0) { *ld1++ = *ld2++ = arg; if (arg[0] == '-') { switch (arg[1]) { #ifdef COLLECT_EXPORT_LIST /* We want to disable automatic exports on AIX when user explicitly puts an export list in command line */ case 'b': if (arg[2] == 'E' || strncmp (&arg[2], "export", 6) == 0) export_flag = 1; else if (arg[2] == '6' && arg[3] == '4') aix64_flag = 1; else if (arg[2] == 'r' && arg[3] == 't' && arg[4] == 'l') aixrtl_flag = 1; break; #endif case 'd': if (!strcmp (arg, "-debug")) { /* Already parsed. */ ld1--; ld2--; } if (!strcmp (arg, "-dynamic-linker") && argv[1]) { ++argv; *ld1++ = *ld2++ = *argv; } break; case 'l': if (first_file) { /* place o_file BEFORE this argument! */ first_file = 0; ld2--; *ld2++ = o_file; *ld2++ = arg; } #ifdef COLLECT_EXPORT_LIST { /* Resolving full library name. */ const char *s = resolve_lib_name (arg+2); /* Saving a full library name. */ add_to_list (&libs, s); } #endif break; #ifdef COLLECT_EXPORT_LIST /* Saving directories where to search for libraries. */ case 'L': add_prefix (&cmdline_lib_dirs, arg+2); break; #else #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES case 'L': if (is_in_args (arg, (const char **) ld1_argv, ld1-1)) --ld1; break; #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */ #endif case 'o': if (arg[2] == '\0') output_file = *ld1++ = *ld2++ = *++argv; else if (1 #ifdef SWITCHES_NEED_SPACES && ! strchr (SWITCHES_NEED_SPACES, arg[1]) #endif ) output_file = &arg[2]; break; case 'r': if (arg[2] == '\0') rflag = 1; break; case 's': if (arg[2] == '\0' && do_collecting) { /* We must strip after the nm run, otherwise C++ linking will not work. Thus we strip in the second ld run, or else with strip if there is no second ld run. */ strip_flag = 1; ld1--; } break; case 'v': if (arg[2] == '\0') vflag = 1; break; case '-': if (strcmp (arg, "--no-demangle") == 0) { demangle_flag = arg; no_demangle = 1; ld1--; ld2--; } else if (strncmp (arg, "--demangle", 10) == 0) { demangle_flag = arg; no_demangle = 0; #ifndef HAVE_LD_DEMANGLE if (arg[10] == '=') { enum demangling_styles style = cplus_demangle_name_to_style (arg+11); if (style == unknown_demangling) error ("unknown demangling style '%s'", arg+11); else current_demangling_style = style; } #endif ld1--; ld2--; } break; } } else if ((p = strrchr (arg, '.')) != (char *) 0 && (strcmp (p, ".o") == 0 || strcmp (p, ".a") == 0 || strcmp (p, ".so") == 0 || strcmp (p, ".lo") == 0 || strcmp (p, ".obj") == 0)) { if (first_file) { first_file = 0; if (p[1] == 'o') *ld2++ = o_file; else { /* place o_file BEFORE this argument! */ ld2--; *ld2++ = o_file; *ld2++ = arg; } } if (p[1] == 'o' || p[1] == 'l') *object++ = arg; #ifdef COLLECT_EXPORT_LIST /* libraries can be specified directly, i.e. without -l flag. */ else { /* Saving a full library name. */ add_to_list (&libs, arg); } #endif } } #ifdef COLLECT_EXPORT_LIST /* This is added only for debugging purposes. */ if (debug) { fprintf (stderr, "List of libraries:\n"); dump_list (stderr, "\t", libs.first); } /* The AIX linker will discard static constructors in object files if nothing else in the file is referenced, so look at them first. */ { const char **export_object_lst = (const char **)object_lst; while (export_object_lst < object) scan_prog_file (*export_object_lst++, PASS_OBJ); } { struct id *list = libs.first; for (; list; list = list->next) scan_prog_file (list->name, PASS_FIRST); } if (exports.first) { char *buf = concat ("-bE:", export_file, NULL); *ld1++ = buf; *ld2++ = buf; exportf = fopen (export_file, "w"); if (exportf == (FILE *) 0) fatal_perror ("fopen %s", export_file); write_aix_file (exportf, exports.first); if (fclose (exportf)) fatal_perror ("fclose %s", export_file); } #endif *c_ptr++ = c_file; *c_ptr = *ld1 = *object = (char *) 0; if (vflag) { notice ("collect2 version %s", version_string); #ifdef TARGET_VERSION TARGET_VERSION; #endif fprintf (stderr, "\n"); } if (debug) { const char *ptr; fprintf (stderr, "ld_file_name = %s\n", (ld_file_name ? ld_file_name : "not found")); fprintf (stderr, "c_file_name = %s\n", (c_file_name ? c_file_name : "not found")); fprintf (stderr, "nm_file_name = %s\n", (nm_file_name ? nm_file_name : "not found")); #ifdef LDD_SUFFIX fprintf (stderr, "ldd_file_name = %s\n", (ldd_file_name ? ldd_file_name : "not found")); #endif fprintf (stderr, "strip_file_name = %s\n", (strip_file_name ? strip_file_name : "not found")); fprintf (stderr, "c_file = %s\n", (c_file ? c_file : "not found")); fprintf (stderr, "o_file = %s\n", (o_file ? o_file : "not found")); ptr = getenv ("COLLECT_GCC_OPTIONS"); if (ptr) fprintf (stderr, "COLLECT_GCC_OPTIONS = %s\n", ptr); ptr = getenv ("COLLECT_GCC"); if (ptr) fprintf (stderr, "COLLECT_GCC = %s\n", ptr); ptr = getenv ("COMPILER_PATH"); if (ptr) fprintf (stderr, "COMPILER_PATH = %s\n", ptr); ptr = getenv (LIBRARY_PATH_ENV); if (ptr) fprintf (stderr, "%-20s= %s\n", LIBRARY_PATH_ENV, ptr); fprintf (stderr, "\n"); } /* Load the program, searching all libraries and attempting to provide undefined symbols from repository information. */ /* On AIX we do this later. */ #ifndef COLLECT_EXPORT_LIST do_tlink (ld1_argv, object_lst); #endif /* If -r or they will be run via some other method, do not build the constructor or destructor list, just return now. */ if (rflag #ifndef COLLECT_EXPORT_LIST || ! do_collecting #endif ) { #ifdef COLLECT_EXPORT_LIST /* Do the link we avoided above if we are exiting. */ do_tlink (ld1_argv, object_lst); /* But make sure we delete the export file we may have created. */ if (export_file != 0 && export_file[0]) maybe_unlink (export_file); #endif maybe_unlink (c_file); maybe_unlink (o_file); return 0; } /* Examine the namelist with nm and search it for static constructors and destructors to call. Write the constructor and destructor tables to a .s file and reload. */ /* On AIX we already scanned for global constructors/destructors. */ #ifndef COLLECT_EXPORT_LIST scan_prog_file (output_file, PASS_FIRST); #endif #ifdef SCAN_LIBRARIES scan_libraries (output_file); #endif if (debug) { notice ("%d constructor(s) found\n", constructors.number); notice ("%d destructor(s) found\n", destructors.number); notice ("%d frame table(s) found\n", frame_tables.number); } if (constructors.number == 0 && destructors.number == 0 && frame_tables.number == 0 #if defined (SCAN_LIBRARIES) || defined (COLLECT_EXPORT_LIST) /* If we will be running these functions ourselves, we want to emit stubs into the shared library so that we do not have to relink dependent programs when we add static objects. */ && ! shared_obj #endif ) { #ifdef COLLECT_EXPORT_LIST /* Do tlink without additional code generation. */ do_tlink (ld1_argv, object_lst); #endif /* Strip now if it was requested on the command line. */ if (strip_flag) { char **real_strip_argv = XCNEWVEC (char *, 3); const char ** strip_argv = (const char **) real_strip_argv; strip_argv[0] = strip_file_name; strip_argv[1] = output_file; strip_argv[2] = (char *) 0; fork_execute ("strip", real_strip_argv); } #ifdef COLLECT_EXPORT_LIST maybe_unlink (export_file); #endif maybe_unlink (c_file); maybe_unlink (o_file); return 0; } /* Sort ctor and dtor lists by priority. */ sort_ids (&constructors); sort_ids (&destructors); maybe_unlink(output_file); outf = fopen (c_file, "w"); if (outf == (FILE *) 0) fatal_perror ("fopen %s", c_file); write_c_file (outf, c_file); if (fclose (outf)) fatal_perror ("fclose %s", c_file); /* Tell the linker that we have initializer and finalizer functions. */ #ifdef LD_INIT_SWITCH #ifdef COLLECT_EXPORT_LIST *ld2++ = concat (LD_INIT_SWITCH, ":", initname, ":", fininame, NULL); #else *ld2++ = LD_INIT_SWITCH; *ld2++ = initname; *ld2++ = LD_FINI_SWITCH; *ld2++ = fininame; #endif #endif #ifdef COLLECT_EXPORT_LIST if (shared_obj) { /* If we did not add export flag to link arguments before, add it to second link phase now. No new exports should have been added. */ if (! exports.first) *ld2++ = concat ("-bE:", export_file, NULL); #ifndef LD_INIT_SWITCH add_to_list (&exports, initname); add_to_list (&exports, fininame); add_to_list (&exports, "_GLOBAL__DI"); add_to_list (&exports, "_GLOBAL__DD"); #endif exportf = fopen (export_file, "w"); if (exportf == (FILE *) 0) fatal_perror ("fopen %s", export_file); write_aix_file (exportf, exports.first); if (fclose (exportf)) fatal_perror ("fclose %s", export_file); } #endif /* End of arguments to second link phase. */ *ld2 = (char*) 0; if (debug) { fprintf (stderr, "\n========== output_file = %s, c_file = %s\n", output_file, c_file); write_c_file (stderr, "stderr"); fprintf (stderr, "========== end of c_file\n\n"); #ifdef COLLECT_EXPORT_LIST fprintf (stderr, "\n========== export_file = %s\n", export_file); write_aix_file (stderr, exports.first); fprintf (stderr, "========== end of export_file\n\n"); #endif } /* Assemble the constructor and destructor tables. Link the tables in with the rest of the program. */ fork_execute ("gcc", c_argv); #ifdef COLLECT_EXPORT_LIST /* On AIX we must call tlink because of possible templates resolution. */ do_tlink (ld2_argv, object_lst); #else /* Otherwise, simply call ld because tlink is already done. */ fork_execute ("ld", ld2_argv); /* Let scan_prog_file do any final mods (OSF/rose needs this for constructors/destructors in shared libraries. */ scan_prog_file (output_file, PASS_SECOND); #endif maybe_unlink (c_file); maybe_unlink (o_file); #ifdef COLLECT_EXPORT_LIST maybe_unlink (export_file); #endif return 0; } /* Wait for a process to finish, and exit if a nonzero status is found. */ int collect_wait (const char *prog, struct pex_obj *pex) { int status; if (!pex_get_status (pex, 1, &status)) fatal_perror ("can't get program status"); pex_free (pex); if (status) { if (WIFSIGNALED (status)) { int sig = WTERMSIG (status); error ("%s terminated with signal %d [%s]%s", prog, sig, strsignal(sig), WCOREDUMP(status) ? ", core dumped" : ""); collect_exit (FATAL_EXIT_CODE); } if (WIFEXITED (status)) return WEXITSTATUS (status); } return 0; } static void do_wait (const char *prog, struct pex_obj *pex) { int ret = collect_wait (prog, pex); if (ret != 0) { error ("%s returned %d exit status", prog, ret); collect_exit (ret); } } /* Execute a program, and wait for the reply. */ struct pex_obj * collect_execute (const char *prog, char **argv, const char *outname, const char *errname) { struct pex_obj *pex; const char *errmsg; int err; if (vflag || debug) { char **p_argv; const char *str; if (argv[0]) fprintf (stderr, "%s", argv[0]); else notice ("[cannot find %s]", prog); for (p_argv = &argv[1]; (str = *p_argv) != (char *) 0; p_argv++) fprintf (stderr, " %s", str); fprintf (stderr, "\n"); } fflush (stdout); fflush (stderr); /* If we cannot find a program we need, complain error. Do this here since we might not end up needing something that we could not find. */ if (argv[0] == 0) fatal ("cannot find '%s'", prog); pex = pex_init (0, "collect2", NULL); if (pex == NULL) fatal_perror ("pex_init failed"); errmsg = pex_run (pex, PEX_LAST | PEX_SEARCH, argv[0], argv, outname, errname, &err); if (errmsg != NULL) { if (err != 0) { errno = err; fatal_perror (errmsg); } else fatal (errmsg); } return pex; } static void fork_execute (const char *prog, char **argv) { struct pex_obj *pex; pex = collect_execute (prog, argv, NULL, NULL); do_wait (prog, pex); } /* Unlink a file unless we are debugging. */ static void maybe_unlink (const char *file) { if (!debug) unlink_if_ordinary (file); else notice ("[Leaving %s]\n", file); } static long sequence_number = 0; /* Add a name to a linked list. */ static void add_to_list (struct head *head_ptr, const char *name) { struct id *newid = xcalloc (sizeof (struct id) + strlen (name), 1); struct id *p; strcpy (newid->name, name); if (head_ptr->first) head_ptr->last->next = newid; else head_ptr->first = newid; /* Check for duplicate symbols. */ for (p = head_ptr->first; strcmp (name, p->name) != 0; p = p->next) ; if (p != newid) { head_ptr->last->next = 0; free (newid); return; } newid->sequence = ++sequence_number; head_ptr->last = newid; head_ptr->number++; } /* Grab the init priority number from an init function name that looks like "_GLOBAL_.I.12345.foo". */ static int extract_init_priority (const char *name) { int pos = 0, pri; while (name[pos] == '_') ++pos; pos += 10; /* strlen ("GLOBAL__X_") */ /* Extract init_p number from ctor/dtor name. */ pri = atoi (name + pos); return pri ? pri : DEFAULT_INIT_PRIORITY; } /* Insertion sort the ids from ctor/dtor list HEAD_PTR in descending order. ctors will be run from right to left, dtors from left to right. */ static void sort_ids (struct head *head_ptr) { /* id holds the current element to insert. id_next holds the next element to insert. id_ptr iterates through the already sorted elements looking for the place to insert id. */ struct id *id, *id_next, **id_ptr; id = head_ptr->first; /* We don't have any sorted elements yet. */ head_ptr->first = NULL; for (; id; id = id_next) { id_next = id->next; id->sequence = extract_init_priority (id->name); for (id_ptr = &(head_ptr->first); ; id_ptr = &((*id_ptr)->next)) if (*id_ptr == NULL /* If the sequence numbers are the same, we put the id from the file later on the command line later in the list. */ || id->sequence > (*id_ptr)->sequence /* Hack: do lexical compare, too. || (id->sequence == (*id_ptr)->sequence && strcmp (id->name, (*id_ptr)->name) > 0) */ ) { id->next = *id_ptr; *id_ptr = id; break; } } /* Now set the sequence numbers properly so write_c_file works. */ for (id = head_ptr->first; id; id = id->next) id->sequence = ++sequence_number; } /* Write: `prefix', the names on list LIST, `suffix'. */ static void write_list (FILE *stream, const char *prefix, struct id *list) { while (list) { fprintf (stream, "%sx%d,\n", prefix, list->sequence); list = list->next; } } #if LINK_ELIMINATE_DUPLICATE_LDIRECTORIES /* Given a STRING, return nonzero if it occurs in the list in range [ARGS_BEGIN,ARGS_END). */ static int is_in_args (const char *string, const char **args_begin, const char **args_end) { const char **args_pointer; for (args_pointer = args_begin; args_pointer != args_end; ++args_pointer) if (strcmp (string, *args_pointer) == 0) return 1; return 0; } #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */ #ifdef COLLECT_EXPORT_LIST /* This function is really used only on AIX, but may be useful. */ #if 0 static int is_in_list (const char *prefix, struct id *list) { while (list) { if (!strcmp (prefix, list->name)) return 1; list = list->next; } return 0; } #endif #endif /* COLLECT_EXPORT_LIST */ /* Added for debugging purpose. */ #ifdef COLLECT_EXPORT_LIST static void dump_list (FILE *stream, const char *prefix, struct id *list) { while (list) { fprintf (stream, "%s%s,\n", prefix, list->name); list = list->next; } } #endif #if 0 static void dump_prefix_list (FILE *stream, const char *prefix, struct prefix_list *list) { while (list) { fprintf (stream, "%s%s,\n", prefix, list->prefix); list = list->next; } } #endif static void write_list_with_asm (FILE *stream, const char *prefix, struct id *list) { while (list) { fprintf (stream, "%sx%d __asm__ (\"%s\");\n", prefix, list->sequence, list->name); list = list->next; } } /* Write out the constructor and destructor tables statically (for a shared object), along with the functions to execute them. */ static void write_c_file_stat (FILE *stream, const char *name ATTRIBUTE_UNUSED) { const char *p, *q; char *prefix, *r; int frames = (frame_tables.number > 0); /* Figure out name of output_file, stripping off .so version. */ p = strrchr (output_file, '/'); if (p == 0) p = output_file; else p++; q = p; while (q) { q = strchr (q,'.'); if (q == 0) { q = p + strlen (p); break; } else { if (strncmp (q, ".so", 3) == 0) { q += 3; break; } else q++; } } /* q points to null at end of the string (or . of the .so version) */ prefix = XNEWVEC (char, q - p + 1); strncpy (prefix, p, q - p); prefix[q - p] = 0; for (r = prefix; *r; r++) if (!ISALNUM ((unsigned char)*r)) *r = '_'; if (debug) notice ("\nwrite_c_file - output name is %s, prefix is %s\n", output_file, prefix); initname = concat ("_GLOBAL__FI_", prefix, NULL); fininame = concat ("_GLOBAL__FD_", prefix, NULL); free (prefix); /* Write the tables as C code. */ fprintf (stream, "static int count;\n"); fprintf (stream, "typedef void entry_pt();\n"); write_list_with_asm (stream, "extern entry_pt ", constructors.first); if (frames) { write_list_with_asm (stream, "extern void *", frame_tables.first); fprintf (stream, "\tstatic void *frame_table[] = {\n"); write_list (stream, "\t\t&", frame_tables.first); fprintf (stream, "\t0\n};\n"); /* This must match what's in frame.h. */ fprintf (stream, "struct object {\n"); fprintf (stream, " void *pc_begin;\n"); fprintf (stream, " void *pc_end;\n"); fprintf (stream, " void *fde_begin;\n"); fprintf (stream, " void *fde_array;\n"); fprintf (stream, " __SIZE_TYPE__ count;\n"); fprintf (stream, " struct object *next;\n"); fprintf (stream, "};\n"); fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n"); fprintf (stream, "extern void *__deregister_frame_info (void *);\n"); fprintf (stream, "static void reg_frame () {\n"); fprintf (stream, "\tstatic struct object ob;\n"); fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n"); fprintf (stream, "\t}\n"); fprintf (stream, "static void dereg_frame () {\n"); fprintf (stream, "\t__deregister_frame_info (frame_table);\n"); fprintf (stream, "\t}\n"); } fprintf (stream, "void %s() {\n", initname); if (constructors.number > 0 || frames) { fprintf (stream, "\tstatic entry_pt *ctors[] = {\n"); write_list (stream, "\t\t", constructors.first); if (frames) fprintf (stream, "\treg_frame,\n"); fprintf (stream, "\t};\n"); fprintf (stream, "\tentry_pt **p;\n"); fprintf (stream, "\tif (count++ != 0) return;\n"); fprintf (stream, "\tp = ctors + %d;\n", constructors.number + frames); fprintf (stream, "\twhile (p > ctors) (*--p)();\n"); } else fprintf (stream, "\t++count;\n"); fprintf (stream, "}\n"); write_list_with_asm (stream, "extern entry_pt ", destructors.first); fprintf (stream, "void %s() {\n", fininame); if (destructors.number > 0 || frames) { fprintf (stream, "\tstatic entry_pt *dtors[] = {\n"); write_list (stream, "\t\t", destructors.first); if (frames) fprintf (stream, "\tdereg_frame,\n"); fprintf (stream, "\t};\n"); fprintf (stream, "\tentry_pt **p;\n"); fprintf (stream, "\tif (--count != 0) return;\n"); fprintf (stream, "\tp = dtors;\n"); fprintf (stream, "\twhile (p < dtors + %d) (*p++)();\n", destructors.number + frames); } fprintf (stream, "}\n"); if (shared_obj) { COLLECT_SHARED_INIT_FUNC(stream, initname); COLLECT_SHARED_FINI_FUNC(stream, fininame); } } /* Write the constructor/destructor tables. */ #ifndef LD_INIT_SWITCH static void write_c_file_glob (FILE *stream, const char *name ATTRIBUTE_UNUSED) { /* Write the tables as C code. */ int frames = (frame_tables.number > 0); fprintf (stream, "typedef void entry_pt();\n\n"); write_list_with_asm (stream, "extern entry_pt ", constructors.first); if (frames) { write_list_with_asm (stream, "extern void *", frame_tables.first); fprintf (stream, "\tstatic void *frame_table[] = {\n"); write_list (stream, "\t\t&", frame_tables.first); fprintf (stream, "\t0\n};\n"); /* This must match what's in frame.h. */ fprintf (stream, "struct object {\n"); fprintf (stream, " void *pc_begin;\n"); fprintf (stream, " void *pc_end;\n"); fprintf (stream, " void *fde_begin;\n"); fprintf (stream, " void *fde_array;\n"); fprintf (stream, " __SIZE_TYPE__ count;\n"); fprintf (stream, " struct object *next;\n"); fprintf (stream, "};\n"); fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n"); fprintf (stream, "extern void *__deregister_frame_info (void *);\n"); fprintf (stream, "static void reg_frame () {\n"); fprintf (stream, "\tstatic struct object ob;\n"); fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n"); fprintf (stream, "\t}\n"); fprintf (stream, "static void dereg_frame () {\n"); fprintf (stream, "\t__deregister_frame_info (frame_table);\n"); fprintf (stream, "\t}\n"); } fprintf (stream, "\nentry_pt * __CTOR_LIST__[] = {\n"); fprintf (stream, "\t(entry_pt *) %d,\n", constructors.number + frames); write_list (stream, "\t", constructors.first); if (frames) fprintf (stream, "\treg_frame,\n"); fprintf (stream, "\t0\n};\n\n"); write_list_with_asm (stream, "extern entry_pt ", destructors.first); fprintf (stream, "\nentry_pt * __DTOR_LIST__[] = {\n"); fprintf (stream, "\t(entry_pt *) %d,\n", destructors.number + frames); write_list (stream, "\t", destructors.first); if (frames) fprintf (stream, "\tdereg_frame,\n"); fprintf (stream, "\t0\n};\n\n"); fprintf (stream, "extern entry_pt %s;\n", NAME__MAIN); fprintf (stream, "entry_pt *__main_reference = %s;\n\n", NAME__MAIN); } #endif /* ! LD_INIT_SWITCH */ static void write_c_file (FILE *stream, const char *name) { fprintf (stream, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n"); #ifndef LD_INIT_SWITCH if (! shared_obj) write_c_file_glob (stream, name); else #endif write_c_file_stat (stream, name); fprintf (stream, "#ifdef __cplusplus\n}\n#endif\n"); } #ifdef COLLECT_EXPORT_LIST static void write_aix_file (FILE *stream, struct id *list) { for (; list; list = list->next) { fputs (list->name, stream); putc ('\n', stream); } } #endif #ifdef OBJECT_FORMAT_NONE /* Generic version to scan the name list of the loaded program for the symbols g++ uses for static constructors and destructors. The constructor table begins at __CTOR_LIST__ and contains a count of the number of pointers (or -1 if the constructors are built in a separate section by the linker), followed by the pointers to the constructor functions, terminated with a null pointer. The destructor table has the same format, and begins at __DTOR_LIST__. */ static void scan_prog_file (const char *prog_name, enum pass which_pass) { void (*int_handler) (int); #ifdef SIGQUIT void (*quit_handler) (int); #endif char *real_nm_argv[4]; const char **nm_argv = (const char **) real_nm_argv; int argc = 0; struct pex_obj *pex; const char *errmsg; int err; char *p, buf[1024]; FILE *inf; if (which_pass == PASS_SECOND) return; /* If we do not have an `nm', complain. */ if (nm_file_name == 0) fatal ("cannot find 'nm'"); nm_argv[argc++] = nm_file_name; if (NM_FLAGS[0] != '\0') nm_argv[argc++] = NM_FLAGS; nm_argv[argc++] = prog_name; nm_argv[argc++] = (char *) 0; /* Trace if needed. */ if (vflag) { const char **p_argv; const char *str; for (p_argv = &nm_argv[0]; (str = *p_argv) != (char *) 0; p_argv++) fprintf (stderr, " %s", str); fprintf (stderr, "\n"); } fflush (stdout); fflush (stderr); pex = pex_init (PEX_USE_PIPES, "collect2", NULL); if (pex == NULL) fatal_perror ("pex_init failed"); errmsg = pex_run (pex, 0, nm_file_name, real_nm_argv, NULL, NULL, &err); if (errmsg != NULL) { if (err != 0) { errno = err; fatal_perror (errmsg); } else fatal (errmsg); } int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN); #ifdef SIGQUIT quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN); #endif inf = pex_read_output (pex, 0); if (inf == NULL) fatal_perror ("can't open nm output"); if (debug) fprintf (stderr, "\nnm output with constructors/destructors.\n"); /* Read each line of nm output. */ while (fgets (buf, sizeof buf, inf) != (char *) 0) { int ch, ch2; char *name, *end; /* If it contains a constructor or destructor name, add the name to the appropriate list. */ for (p = buf; (ch = *p) != '\0' && ch != '\n' && ch != '_'; p++) if (ch == ' ' && p[1] == 'U' && p[2] == ' ') break; if (ch != '_') continue; name = p; /* Find the end of the symbol name. Do not include `|', because Encore nm can tack that on the end. */ for (end = p; (ch2 = *end) != '\0' && !ISSPACE (ch2) && ch2 != '|'; end++) continue; *end = '\0'; switch (is_ctor_dtor (name)) { case 1: if (which_pass != PASS_LIB) add_to_list (&constructors, name); break; case 2: if (which_pass != PASS_LIB) add_to_list (&destructors, name); break; case 3: if (which_pass != PASS_LIB) fatal ("init function found in object %s", prog_name); #ifndef LD_INIT_SWITCH add_to_list (&constructors, name); #endif break; case 4: if (which_pass != PASS_LIB) fatal ("fini function found in object %s", prog_name); #ifndef LD_FINI_SWITCH add_to_list (&destructors, name); #endif break; case 5: if (which_pass != PASS_LIB) add_to_list (&frame_tables, name); break; default: /* not a constructor or destructor */ continue; } if (debug) fprintf (stderr, "\t%s\n", buf); } if (debug) fprintf (stderr, "\n"); do_wait (nm_file_name, pex); signal (SIGINT, int_handler); #ifdef SIGQUIT signal (SIGQUIT, quit_handler); #endif } #ifdef LDD_SUFFIX /* Use the List Dynamic Dependencies program to find shared libraries that the output file depends upon and their initialization/finalization routines, if any. */ static void scan_libraries (const char *prog_name) { static struct head libraries; /* list of shared libraries found */ struct id *list; void (*int_handler) (int); #ifdef SIGQUIT void (*quit_handler) (int); #endif char *real_ldd_argv[4]; const char **ldd_argv = (const char **) real_ldd_argv; int argc = 0; struct pex_obj *pex; const char *errmsg; int err; char buf[1024]; FILE *inf; /* If we do not have an `ldd', complain. */ if (ldd_file_name == 0) { error ("cannot find 'ldd'"); return; } ldd_argv[argc++] = ldd_file_name; ldd_argv[argc++] = prog_name; ldd_argv[argc++] = (char *) 0; /* Trace if needed. */ if (vflag) { const char **p_argv; const char *str; for (p_argv = &ldd_argv[0]; (str = *p_argv) != (char *) 0; p_argv++) fprintf (stderr, " %s", str); fprintf (stderr, "\n"); } fflush (stdout); fflush (stderr); pex = pex_init (PEX_USE_PIPES, "collect2", NULL); if (pex == NULL) fatal_perror ("pex_init failed"); errmsg = pex_run (pex, 0, ldd_file_name, real_ldd_argv, NULL, NULL, &err); if (errmsg != NULL) { if (err != 0) { errno = err; fatal_perror (errmsg); } else fatal (errmsg); } int_handler = (void (*) (int)) signal (SIGINT, SIG_IGN); #ifdef SIGQUIT quit_handler = (void (*) (int)) signal (SIGQUIT, SIG_IGN); #endif inf = pex_read_output (pex, 0); if (inf == NULL) fatal_perror ("can't open ldd output"); if (debug) notice ("\nldd output with constructors/destructors.\n"); /* Read each line of ldd output. */ while (fgets (buf, sizeof buf, inf) != (char *) 0) { int ch2; char *name, *end, *p = buf; /* Extract names of libraries and add to list. */ PARSE_LDD_OUTPUT (p); if (p == 0) continue; name = p; if (strncmp (name, "not found", sizeof ("not found") - 1) == 0) fatal ("dynamic dependency %s not found", buf); /* Find the end of the symbol name. */ for (end = p; (ch2 = *end) != '\0' && ch2 != '\n' && !ISSPACE (ch2) && ch2 != '|'; end++) continue; *end = '\0'; if (access (name, R_OK) == 0) add_to_list (&libraries, name); else fatal ("unable to open dynamic dependency '%s'", buf); if (debug) fprintf (stderr, "\t%s\n", buf); } if (debug) fprintf (stderr, "\n"); do_wait (ldd_file_name, pex); signal (SIGINT, int_handler); #ifdef SIGQUIT signal (SIGQUIT, quit_handler); #endif /* Now iterate through the library list adding their symbols to the list. */ for (list = libraries.first; list; list = list->next) scan_prog_file (list->name, PASS_LIB); } #endif /* LDD_SUFFIX */ #endif /* OBJECT_FORMAT_NONE */ /* * COFF specific stuff. */ #ifdef OBJECT_FORMAT_COFF #if defined (EXTENDED_COFF) # define GCC_SYMBOLS(X) (SYMHEADER(X).isymMax + SYMHEADER(X).iextMax) # define GCC_SYMENT SYMR # define GCC_OK_SYMBOL(X) ((X).st == stProc || (X).st == stGlobal) # define GCC_SYMINC(X) (1) # define GCC_SYMZERO(X) (SYMHEADER(X).isymMax) # define GCC_CHECK_HDR(X) (PSYMTAB(X) != 0) #else # define GCC_SYMBOLS(X) (HEADER(ldptr).f_nsyms) # define GCC_SYMENT SYMENT # if defined (C_WEAKEXT) # define GCC_OK_SYMBOL(X) \ (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \ ((X).n_scnum > N_UNDEF) && \ (aix64_flag \ || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \ || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT)))) # define GCC_UNDEF_SYMBOL(X) \ (((X).n_sclass == C_EXT || (X).n_sclass == C_WEAKEXT) && \ ((X).n_scnum == N_UNDEF)) # else # define GCC_OK_SYMBOL(X) \ (((X).n_sclass == C_EXT) && \ ((X).n_scnum > N_UNDEF) && \ (aix64_flag \ || (((X).n_type & N_TMASK) == (DT_NON << N_BTSHFT) \ || ((X).n_type & N_TMASK) == (DT_FCN << N_BTSHFT)))) # define GCC_UNDEF_SYMBOL(X) \ (((X).n_sclass == C_EXT) && ((X).n_scnum == N_UNDEF)) # endif # define GCC_SYMINC(X) ((X).n_numaux+1) # define GCC_SYMZERO(X) 0 /* 0757 = U803XTOCMAGIC (AIX 4.3) and 0767 = U64_TOCMAGIC (AIX V5) */ #ifdef _AIX51 # define GCC_CHECK_HDR(X) \ ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \ || (HEADER (X).f_magic == 0767 && aix64_flag)) #else # define GCC_CHECK_HDR(X) \ ((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \ || (HEADER (X).f_magic == 0757 && aix64_flag)) #endif #endif #ifdef COLLECT_EXPORT_LIST /* Array of standard AIX libraries which should not be scanned for ctors/dtors. */ static const char *const aix_std_libs[] = { "/unix", "/lib/libc.a", "/lib/libm.a", "/lib/libc_r.a", "/lib/libm_r.a", "/usr/lib/libc.a", "/usr/lib/libm.a", "/usr/lib/libc_r.a", "/usr/lib/libm_r.a", "/usr/lib/threads/libc.a", "/usr/ccs/lib/libc.a", "/usr/ccs/lib/libm.a", "/usr/ccs/lib/libc_r.a", "/usr/ccs/lib/libm_r.a", NULL }; /* This function checks the filename and returns 1 if this name matches the location of a standard AIX library. */ static int ignore_library (const char *); static int ignore_library (const char *name) { const char *const *p = &aix_std_libs[0]; while (*p++ != NULL) if (! strcmp (name, *p)) return 1; return 0; } #endif /* COLLECT_EXPORT_LIST */ #if defined (HAVE_DECL_LDGETNAME) && !HAVE_DECL_LDGETNAME extern char *ldgetname (LDFILE *, GCC_SYMENT *); #endif /* COFF version to scan the name list of the loaded program for the symbols g++ uses for static constructors and destructors. The constructor table begins at __CTOR_LIST__ and contains a count of the number of pointers (or -1 if the constructors are built in a separate section by the linker), followed by the pointers to the constructor functions, terminated with a null pointer. The destructor table has the same format, and begins at __DTOR_LIST__. */ static void scan_prog_file (const char *prog_name, enum pass which_pass) { LDFILE *ldptr = NULL; int sym_index, sym_count; int is_shared = 0; if (which_pass != PASS_FIRST && which_pass != PASS_OBJ) return; #ifdef COLLECT_EXPORT_LIST /* We do not need scanning for some standard C libraries. */ if (which_pass == PASS_FIRST && ignore_library (prog_name)) return; /* On AIX we have a loop, because there is not much difference between an object and an archive. This trick allows us to eliminate scan_libraries() function. */ do { #endif /* Some platforms (e.g. OSF4) declare ldopen as taking a non-const char * filename parameter, even though it will not modify that string. So we must cast away const-ness here, which will cause -Wcast-qual to burp. */ if ((ldptr = ldopen ((char *)prog_name, ldptr)) != NULL) { if (! MY_ISCOFF (HEADER (ldptr).f_magic)) fatal ("%s: not a COFF file", prog_name); if (GCC_CHECK_HDR (ldptr)) { sym_count = GCC_SYMBOLS (ldptr); sym_index = GCC_SYMZERO (ldptr); #ifdef COLLECT_EXPORT_LIST /* Is current archive member a shared object? */ is_shared = HEADER (ldptr).f_flags & F_SHROBJ; #endif while (sym_index < sym_count) { GCC_SYMENT symbol; if (ldtbread (ldptr, sym_index, &symbol) <= 0) break; sym_index += GCC_SYMINC (symbol); if (GCC_OK_SYMBOL (symbol)) { char *name; if ((name = ldgetname (ldptr, &symbol)) == NULL) continue; /* Should never happen. */ #ifdef XCOFF_DEBUGGING_INFO /* All AIX function names have a duplicate entry beginning with a dot. */ if (*name == '.') ++name; #endif switch (is_ctor_dtor (name)) { case 1: if (! is_shared) add_to_list (&constructors, name); #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH) if (which_pass == PASS_OBJ) add_to_list (&exports, name); #endif break; case 2: if (! is_shared) add_to_list (&destructors, name); #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH) if (which_pass == PASS_OBJ) add_to_list (&exports, name); #endif break; #ifdef COLLECT_EXPORT_LIST case 3: #ifndef LD_INIT_SWITCH if (is_shared) add_to_list (&constructors, name); #endif break; case 4: #ifndef LD_INIT_SWITCH if (is_shared) add_to_list (&destructors, name); #endif break; #endif case 5: if (! is_shared) add_to_list (&frame_tables, name); #if defined (COLLECT_EXPORT_LIST) && !defined (LD_INIT_SWITCH) if (which_pass == PASS_OBJ) add_to_list (&exports, name); #endif break; default: /* not a constructor or destructor */ #ifdef COLLECT_EXPORT_LIST /* Explicitly export all global symbols when building a shared object on AIX, but do not re-export symbols from another shared object and do not export symbols if the user provides an explicit export list. */ if (shared_obj && !is_shared && which_pass == PASS_OBJ && !export_flag) add_to_list (&exports, name); #endif continue; } if (debug) #if !defined(EXTENDED_COFF) fprintf (stderr, "\tsec=%d class=%d type=%s%o %s\n", symbol.n_scnum, symbol.n_sclass, (symbol.n_type ? "0" : ""), symbol.n_type, name); #else fprintf (stderr, "\tiss = %5d, value = %5ld, index = %5d, name = %s\n", symbol.iss, (long) symbol.value, symbol.index, name); #endif } } } #ifdef COLLECT_EXPORT_LIST else { /* If archive contains both 32-bit and 64-bit objects, we want to skip objects in other mode so mismatch normal. */ if (debug) fprintf (stderr, "%s : magic=%o aix64=%d mismatch\n", prog_name, HEADER (ldptr).f_magic, aix64_flag); } #endif } else { fatal ("%s: cannot open as COFF file", prog_name); } #ifdef COLLECT_EXPORT_LIST /* On AIX loop continues while there are more members in archive. */ } while (ldclose (ldptr) == FAILURE); #else /* Otherwise we simply close ldptr. */ (void) ldclose(ldptr); #endif } #endif /* OBJECT_FORMAT_COFF */ #ifdef COLLECT_EXPORT_LIST /* Given a library name without "lib" prefix, this function returns a full library name including a path. */ static char * resolve_lib_name (const char *name) { char *lib_buf; int i, j, l = 0; /* Library extensions for AIX dynamic linking. */ const char * const libexts[2] = {"a", "so"}; for (i = 0; libpaths[i]; i++) if (libpaths[i]->max_len > l) l = libpaths[i]->max_len; lib_buf = xmalloc (l + strlen(name) + 10); for (i = 0; libpaths[i]; i++) { struct prefix_list *list = libpaths[i]->plist; for (; list; list = list->next) { /* The following lines are needed because path_prefix list may contain directories both with trailing '/' and without it. */ const char *p = ""; if (list->prefix[strlen(list->prefix)-1] != '/') p = "/"; for (j = 0; j < 2; j++) { sprintf (lib_buf, "%s%slib%s.%s", list->prefix, p, name, libexts[(j + aixrtl_flag) % 2]); if (debug) fprintf (stderr, "searching for: %s\n", lib_buf); if (file_exists (lib_buf)) { if (debug) fprintf (stderr, "found: %s\n", lib_buf); return (lib_buf); } } } } if (debug) fprintf (stderr, "not found\n"); else fatal ("library lib%s not found", name); return (NULL); } #endif /* COLLECT_EXPORT_LIST */
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