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Diffstat (limited to 'gcc-4.8.1/gcc/collect2.c')
| -rw-r--r-- | gcc-4.8.1/gcc/collect2.c | 3113 |
1 files changed, 0 insertions, 3113 deletions
diff --git a/gcc-4.8.1/gcc/collect2.c b/gcc-4.8.1/gcc/collect2.c deleted file mode 100644 index 99dd41dc1..000000000 --- a/gcc-4.8.1/gcc/collect2.c +++ /dev/null @@ -1,3113 +0,0 @@ -/* Collect static initialization info into data structures that can be - traversed by C++ initialization and finalization routines. - Copyright (C) 1992-2013 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 "filenames.h" -#include "file-find.h" - -/* TARGET_64BIT may be defined to use driver specific functionality. */ -#undef TARGET_64BIT -#define TARGET_64BIT TARGET_64BIT_DEFAULT - -#ifndef LIBRARY_PATH_ENV -#define LIBRARY_PATH_ENV "LIBRARY_PATH" -#endif - -#define COLLECT - -#include "collect2.h" -#include "collect2-aix.h" -#include "diagnostic.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_DIRECTORY_STRUCTURE -#ifndef CROSS_AIX_SUPPORT -#undef OBJECT_FORMAT_COFF -#endif -#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 - -#ifndef CROSS_DIRECTORY_STRUCTURE -#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> -#endif - -/* 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 - -#ifndef SHLIB_SUFFIX -#define SHLIB_SUFFIX ".so" -#endif - -#ifdef USE_COLLECT2 -int do_collecting = 1; -#else -int do_collecting = 0; -#endif - -/* Cook up an always defined indication of whether we proceed the - "EXPORT_LIST" way. */ - -#ifdef COLLECT_EXPORT_LIST -#define DO_COLLECT_EXPORT_LIST 1 -#else -#define DO_COLLECT_EXPORT_LIST 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; -}; - -bool vflag; /* true if -v or --version */ -static int rflag; /* true if -r */ -static int strip_flag; /* true if -s */ -#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 - -enum lto_mode_d { - LTO_MODE_NONE, /* Not doing LTO. */ - LTO_MODE_LTO, /* Normal LTO. */ - LTO_MODE_WHOPR /* WHOPR. */ -}; - -/* Current LTO mode. */ -static enum lto_mode_d lto_mode = LTO_MODE_NONE; - -bool debug; /* true if -debug */ -bool helpflag; /* true if --help */ - -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 -static char **lto_o_files; /* Output files for LTO. */ -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 */ - -static bool at_file_supplied; /* Whether to use @file arguments */ -static char *response_file; /* Name of any current response file */ - -struct obstack temporary_obstack; -char * temporary_firstobj; - -/* A string that must be prepended to a target OS path in order to find - it on the host system. */ -#ifdef TARGET_SYSTEM_ROOT -static const char *target_system_root = TARGET_SYSTEM_ROOT; -#else -static const char *target_system_root = ""; -#endif - -/* Whether we may unlink the output file, which should be set as soon as we - know we have successfully produced it. This is typically useful to prevent - blindly attempting to unlink a read-only output that the target linker - would leave untouched. */ -bool may_unlink_output_file = false; - -#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 - -/* List of names of object files containing LTO information. - These are a subset of the object file names appearing on the - command line, and must be identical, in the sense of pointer - equality, with the names passed to maybe_run_lto_and_relink(). */ - -struct lto_object -{ - const char *name; /* Name of object file. */ - struct lto_object *next; /* Next in linked list. */ -}; - -struct lto_object_list -{ - struct lto_object *first; /* First list element. */ - struct lto_object *last; /* Last list element. */ -}; - -static struct lto_object_list lto_objects; - -/* Special kinds of symbols that a name may denote. */ - -typedef enum { - SYM_REGULAR = 0, /* nothing special */ - - SYM_CTOR = 1, /* constructor */ - SYM_DTOR = 2, /* destructor */ - SYM_INIT = 3, /* shared object routine that calls all the ctors */ - SYM_FINI = 4, /* shared object routine that calls all the dtors */ - SYM_DWEH = 5 /* DWARF exception handling table */ -} symkind; - -static symkind is_ctor_dtor (const char *); - -static void handler (int); -static void do_wait (const char *, struct pex_obj *); -static void fork_execute (const char *, char **); -static void maybe_unlink (const char *); -static void maybe_unlink_list (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 -#ifdef SCAN_LIBRARIES -static void scan_libraries (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 **); -static void post_ld_pass (bool); -static void process_args (int *argcp, char **argv); - -/* Enumerations describing which pass this is for scanning the - program file ... */ - -typedef enum { - PASS_FIRST, /* without constructors */ - PASS_OBJ, /* individual objects */ - PASS_LIB, /* looking for shared libraries */ - PASS_SECOND, /* with constructors linked in */ - PASS_LTOINFO /* looking for objects with LTO info */ -} scanpass; - -/* ... and which kinds of symbols are to be considered. */ - -enum scanfilter_masks { - SCAN_NOTHING = 0, - - SCAN_CTOR = 1 << SYM_CTOR, - SCAN_DTOR = 1 << SYM_DTOR, - SCAN_INIT = 1 << SYM_INIT, - SCAN_FINI = 1 << SYM_FINI, - SCAN_DWEH = 1 << SYM_DWEH, - SCAN_ALL = ~0 -}; - -/* This type is used for parameters and variables which hold - combinations of the flags in enum scanfilter_masks. */ -typedef int scanfilter; - -/* Scan the name list of the loaded program for the symbols g++ uses for - static constructors and destructors. - - The SCANPASS argument tells which collect processing pass this is for and - the SCANFILTER argument tells which kinds of symbols to consider in this - pass. Symbols of a special kind not in the filter mask are considered as - regular ones. - - 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 *, scanpass, scanfilter); - - -/* 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 (lto_o_files) - maybe_unlink_list (lto_o_files); - - if (ldout != 0 && ldout[0]) - { - dump_ld_file (ldout, stdout); - maybe_unlink (ldout); - } - - if (lderrout != 0 && lderrout[0]) - { - dump_ld_file (lderrout, stderr); - maybe_unlink (lderrout); - } - - if (status != 0 && output_file != 0 && output_file[0]) - maybe_unlink (output_file); - - if (response_file) - maybe_unlink (response_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); -} - -/* Notify user of a non-error, without translating the format string. */ -void -notice_translated (const char *cmsgid, ...) -{ - va_list ap; - - va_start (ap, cmsgid); - vfprintf (stderr, cmsgid, ap); - va_end (ap); -} - -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 - - if (lto_o_files) - maybe_unlink_list (lto_o_files); - - if (response_file) - maybe_unlink (response_file); - - 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_ld_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 == '$' || c == '.')) - obstack_1grow (&temporary_obstack, c); - if (obstack_object_size (&temporary_obstack) > 0) - { - const char *word, *p; - char *result; - obstack_1grow (&temporary_obstack, '\0'); - word = XOBFINISH (&temporary_obstack, const char *); - - if (*word == '.') - ++word, putc ('.', to); - p = word; - if (!strncmp (p, USER_LABEL_PREFIX, strlen (USER_LABEL_PREFIX))) - p += strlen (USER_LABEL_PREFIX); - -#ifdef HAVE_LD_DEMANGLE - result = 0; -#else - if (no_demangle) - result = 0; - else - result = cplus_demangle (p, DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE); -#endif - - if (result) - { - int diff; - fputs (result, to); - - diff = strlen (word) - strlen (result); - while (diff > 0 && c == ' ') - --diff, putc (' ', to); - if (diff < 0 && c == ' ') - { - while (diff < 0 && c == ' ') - ++diff, c = getc (stream); - if (!ISSPACE (c)) - { - /* Make sure we output at least one space, or - the demangled symbol name will run into - whatever text follows. */ - putc (' ', to); - } - } - - free (result); - } - else - fputs (word, to); - - fflush (to); - obstack_free (&temporary_obstack, temporary_firstobj); - } - if (c == EOF) - break; - putc (c, to); - } - fclose (stream); -} - -/* Return the kind of symbol denoted by name S. */ - -static symkind -is_ctor_dtor (const char *s) -{ - struct names { const char *const name; const int len; symkind ret; - const int two_underscores; }; - - const struct names *p; - int ch; - const char *orig_s = s; - - static const struct names special[] = { -#ifndef NO_DOLLAR_IN_LABEL - { "GLOBAL__I$", sizeof ("GLOBAL__I$")-1, SYM_CTOR, 0 }, - { "GLOBAL__D$", sizeof ("GLOBAL__D$")-1, SYM_DTOR, 0 }, -#else -#ifndef NO_DOT_IN_LABEL - { "GLOBAL__I.", sizeof ("GLOBAL__I.")-1, SYM_CTOR, 0 }, - { "GLOBAL__D.", sizeof ("GLOBAL__D.")-1, SYM_DTOR, 0 }, -#endif /* NO_DOT_IN_LABEL */ -#endif /* NO_DOLLAR_IN_LABEL */ - { "GLOBAL__I_", sizeof ("GLOBAL__I_")-1, SYM_CTOR, 0 }, - { "GLOBAL__D_", sizeof ("GLOBAL__D_")-1, SYM_DTOR, 0 }, - { "GLOBAL__F_", sizeof ("GLOBAL__F_")-1, SYM_DWEH, 0 }, - { "GLOBAL__FI_", sizeof ("GLOBAL__FI_")-1, SYM_INIT, 0 }, - { "GLOBAL__FD_", sizeof ("GLOBAL__FD_")-1, SYM_FINI, 0 }, - { NULL, 0, SYM_REGULAR, 0 } - }; - - while ((ch = *s) == '_') - ++s; - - if (s == orig_s) - return SYM_REGULAR; - - 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 SYM_REGULAR; -} - -/* 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_DIRECTORY_STRUCTURE -/* 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. */ - -#ifdef OBJECT_FORMAT_NONE - -/* Add an entry for the object file NAME to object file list LIST. - New entries are added at the end of the list. The original pointer - value of NAME is preserved, i.e., no string copy is performed. */ - -static void -add_lto_object (struct lto_object_list *list, const char *name) -{ - struct lto_object *n = XNEW (struct lto_object); - n->name = name; - n->next = NULL; - - if (list->last) - list->last->next = n; - else - list->first = n; - - list->last = n; -} -#endif /* OBJECT_FORMAT_NONE */ - - -/* Perform a link-time recompilation and relink if any of the object - files contain LTO info. The linker command line LTO_LD_ARGV - represents the linker command that would produce a final executable - without the use of LTO. OBJECT_LST is a vector of object file names - appearing in LTO_LD_ARGV that are to be considered for link-time - recompilation, where OBJECT is a pointer to the last valid element. - (This awkward convention avoids an impedance mismatch with the - usage of similarly-named variables in main().) The elements of - OBJECT_LST must be identical, i.e., pointer equal, to the - corresponding arguments in LTO_LD_ARGV. - - Upon entry, at least one linker run has been performed without the - use of any LTO info that might be present. Any recompilations - necessary for template instantiations have been performed, and - initializer/finalizer tables have been created if needed and - included in the linker command line LTO_LD_ARGV. If any of the - object files contain LTO info, we run the LTO back end on all such - files, and perform the final link with the LTO back end output - substituted for the LTO-optimized files. In some cases, a final - link with all link-time generated code has already been performed, - so there is no need to relink if no LTO info is found. In other - cases, our caller has not produced the final executable, and is - relying on us to perform the required link whether LTO info is - present or not. In that case, the FORCE argument should be true. - Note that the linker command line argument LTO_LD_ARGV passed into - this function may be modified in place. */ - -static void -maybe_run_lto_and_relink (char **lto_ld_argv, char **object_lst, - const char **object, bool force) -{ - const char **object_file = CONST_CAST2 (const char **, char **, object_lst); - - int num_lto_c_args = 1; /* Allow space for the terminating NULL. */ - - while (object_file < object) - { - /* If file contains LTO info, add it to the list of LTO objects. */ - scan_prog_file (*object_file++, PASS_LTOINFO, SCAN_ALL); - - /* Increment the argument count by the number of object file arguments - we will add. An upper bound suffices, so just count all of the - object files regardless of whether they contain LTO info. */ - num_lto_c_args++; - } - - if (lto_objects.first) - { - char **lto_c_argv; - const char **lto_c_ptr; - char **p; - char **lto_o_ptr; - struct lto_object *list; - char *lto_wrapper = getenv ("COLLECT_LTO_WRAPPER"); - struct pex_obj *pex; - const char *prog = "lto-wrapper"; - int lto_ld_argv_size = 0; - char **out_lto_ld_argv; - int out_lto_ld_argv_size; - size_t num_files; - - if (!lto_wrapper) - fatal_error ("COLLECT_LTO_WRAPPER must be set"); - - num_lto_c_args++; - - /* There is at least one object file containing LTO info, - so we need to run the LTO back end and relink. - - To do so we build updated ld arguments with first - LTO object replaced by all partitions and other LTO - objects removed. */ - - lto_c_argv = (char **) xcalloc (sizeof (char *), num_lto_c_args); - lto_c_ptr = CONST_CAST2 (const char **, char **, lto_c_argv); - - *lto_c_ptr++ = lto_wrapper; - - /* Add LTO objects to the wrapper command line. */ - for (list = lto_objects.first; list; list = list->next) - *lto_c_ptr++ = list->name; - - *lto_c_ptr = NULL; - - /* Run the LTO back end. */ - pex = collect_execute (prog, lto_c_argv, NULL, NULL, PEX_SEARCH); - { - int c; - FILE *stream; - size_t i; - char *start, *end; - - stream = pex_read_output (pex, 0); - gcc_assert (stream); - - num_files = 0; - while ((c = getc (stream)) != EOF) - { - obstack_1grow (&temporary_obstack, c); - if (c == '\n') - ++num_files; - } - - lto_o_files = XNEWVEC (char *, num_files + 1); - lto_o_files[num_files] = NULL; - start = XOBFINISH (&temporary_obstack, char *); - for (i = 0; i < num_files; ++i) - { - end = start; - while (*end != '\n') - ++end; - *end = '\0'; - - lto_o_files[i] = xstrdup (start); - - start = end + 1; - } - - obstack_free (&temporary_obstack, temporary_firstobj); - } - do_wait (prog, pex); - pex = NULL; - - /* Compute memory needed for new LD arguments. At most number of original arguemtns - plus number of partitions. */ - for (lto_ld_argv_size = 0; lto_ld_argv[lto_ld_argv_size]; lto_ld_argv_size++) - ; - out_lto_ld_argv = XCNEWVEC(char *, num_files + lto_ld_argv_size + 1); - out_lto_ld_argv_size = 0; - - /* After running the LTO back end, we will relink, substituting - the LTO output for the object files that we submitted to the - LTO. Here, we modify the linker command line for the relink. */ - - /* Copy all arguments until we find first LTO file. */ - p = lto_ld_argv; - while (*p != NULL) - { - for (list = lto_objects.first; list; list = list->next) - if (*p == list->name) /* Note test for pointer equality! */ - break; - if (list) - break; - out_lto_ld_argv[out_lto_ld_argv_size++] = *p++; - } - - /* Now insert all LTO partitions. */ - lto_o_ptr = lto_o_files; - while (*lto_o_ptr) - out_lto_ld_argv[out_lto_ld_argv_size++] = *lto_o_ptr++; - - /* ... and copy the rest. */ - while (*p != NULL) - { - for (list = lto_objects.first; list; list = list->next) - if (*p == list->name) /* Note test for pointer equality! */ - break; - if (!list) - out_lto_ld_argv[out_lto_ld_argv_size++] = *p; - p++; - } - out_lto_ld_argv[out_lto_ld_argv_size++] = 0; - - /* Run the linker again, this time replacing the object files - optimized by the LTO with the temporary file generated by the LTO. */ - fork_execute ("ld", out_lto_ld_argv); - post_ld_pass (true); - free (lto_ld_argv); - - maybe_unlink_list (lto_o_files); - } - else if (force) - { - /* Our caller is relying on us to do the link - even though there is no LTO back end work to be done. */ - fork_execute ("ld", lto_ld_argv); - post_ld_pass (false); - } -} - -/* Main program. */ - -int -main (int argc, char **argv) -{ - enum linker_select - { - USE_DEFAULT_LD, - USE_PLUGIN_LD, - USE_GOLD_LD, - USE_BFD_LD, - USE_LD_MAX - } selected_linker = USE_DEFAULT_LD; - static const char *const ld_suffixes[USE_LD_MAX] = - { - "ld", - PLUGIN_LD_SUFFIX, - "ld.gold", - "ld.bfd" - }; - 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"; - - const char *full_ld_suffixes[USE_LD_MAX]; -#ifdef CROSS_DIRECTORY_STRUCTURE - /* 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_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 -#ifdef LDD_SUFFIX - const char *const full_ldd_suffix = ldd_suffix; -#endif - const char *const full_nm_suffix = nm_suffix; - const char *const full_gnm_suffix = gnm_suffix; - const char *const full_strip_suffix = strip_suffix; - const char *const full_gstrip_suffix = gstrip_suffix; -#endif /* CROSS_DIRECTORY_STRUCTURE */ - - 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; - bool use_plugin = false; - bool use_collect_ld = false; - - /* The kinds of symbols we will have to consider when scanning the - outcome of a first pass link. This is ALL to start with, then might - be adjusted before getting to the first pass link per se, typically on - AIX where we perform an early scan of objects and libraries to fetch - the list of global ctors/dtors and make sure they are not garbage - collected. */ - scanfilter ld1_filter = SCAN_ALL; - - char **ld2_argv; - const char **ld2; - char **object_lst; - const char **object; -#ifdef TARGET_AIX_VERSION - int object_nbr = argc; -#endif - int first_file; - int num_c_args; - char **old_argv; - int i; - - for (i = 0; i < USE_LD_MAX; i++) - full_ld_suffixes[i] -#ifdef CROSS_DIRECTORY_STRUCTURE - = concat (target_machine, "-", ld_suffixes[i], NULL); -#else - = ld_suffixes[i]; -#endif - - p = argv[0] + strlen (argv[0]); - while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1])) - --p; - progname = p; - - xmalloc_set_program_name (progname); - - old_argv = argv; - expandargv (&argc, &argv); - if (argv != old_argv) - at_file_supplied = 1; - - process_args (&argc, argv); - - num_c_args = argc + 9; - -#ifndef HAVE_LD_DEMANGLE - no_demangle = !! getenv ("COLLECT_NO_DEMANGLE"); - - /* Suppress demangling by the real linker, which may be broken. */ - putenv (xstrdup ("COLLECT_NO_DEMANGLE=1")); -#endif - -#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 (); - - diagnostic_initialize (global_dc, 0); - - /* Do not invoke xcalloc before this point, since locale needs to be - set first, in case a diagnostic is issued. */ - - ld1_argv = XCNEWVEC (char *, argc + 4); - ld1 = CONST_CAST2 (const char **, char **, ld1_argv); - ld2_argv = XCNEWVEC (char *, argc + 11); - ld2 = CONST_CAST2 (const char **, char **, ld2_argv); - object_lst = XCNEWVEC (char *, argc); - object = CONST_CAST2 (const char **, char **, object_lst); - -#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. We also look for the -flto or -flto-partition=none flag to know - what LTO mode we are in. */ - { - bool no_partition = false; - - for (i = 1; argv[i] != NULL; i ++) - { - if (! strcmp (argv[i], "-debug")) - debug = true; - else if (! strcmp (argv[i], "-flto-partition=none")) - no_partition = true; - else if ((! strncmp (argv[i], "-flto=", 6) - || ! strcmp (argv[i], "-flto")) && ! use_plugin) - lto_mode = LTO_MODE_WHOPR; - else if (!strncmp (argv[i], "-fno-lto", 8)) - lto_mode = LTO_MODE_NONE; - else if (! strcmp (argv[i], "-plugin")) - { - use_plugin = true; - lto_mode = LTO_MODE_NONE; - if (selected_linker == USE_DEFAULT_LD) - selected_linker = USE_PLUGIN_LD; - } - else if (strcmp (argv[i], "-fuse-ld=bfd") == 0) - selected_linker = USE_BFD_LD; - else if (strcmp (argv[i], "-fuse-ld=gold") == 0) - selected_linker = USE_GOLD_LD; - -#ifdef COLLECT_EXPORT_LIST - /* These flags are position independent, although their order - is important - subsequent flags override earlier ones. */ - else if (strcmp (argv[i], "-b64") == 0) - aix64_flag = 1; - /* -bexport:filename always needs the :filename */ - else if (strncmp (argv[i], "-bE:", 4) == 0 - || strncmp (argv[i], "-bexport:", 9) == 0) - export_flag = 1; - else if (strcmp (argv[i], "-brtl") == 0 - || strcmp (argv[i], "-bsvr4") == 0 - || strcmp (argv[i], "-G") == 0) - aixrtl_flag = 1; - else if (strcmp (argv[i], "-bnortl") == 0) - aixrtl_flag = 0; -#endif - } - vflag = debug; - find_file_set_debug (debug); - if (no_partition && lto_mode == LTO_MODE_WHOPR) - lto_mode = LTO_MODE_LTO; - } - -#ifndef DEFAULT_A_OUT_NAME - output_file = "a.out"; -#else - output_file = DEFAULT_A_OUT_NAME; -#endif - - obstack_begin (&temporary_obstack, 0); - temporary_firstobj = (char *) 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 -fno-whole-program */ - num_c_args += 6; - - c_argv = XCNEWVEC (char *, num_c_args); - c_ptr = CONST_CAST2 (const char **, char **, c_argv); - - if (argc < 2) - fatal_error ("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); - use_collect_ld = ld_file_name != 0; - } - /* 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_suffixes[selected_linker]); - /* 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_suffixes[selected_linker]); - -#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_DIRECTORY_STRUCTURE - 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"; - *c_ptr++ = "-fno-whole-program"; - - /* !!! 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; - while ((arg = *++argv) != (char *) 0) - { - *ld1++ = *ld2++ = arg; - - if (arg[0] == '-') - { - switch (arg[1]) - { - case 'd': - if (!strcmp (arg, "-debug")) - { - /* Already parsed. */ - ld1--; - ld2--; - } - if (!strcmp (arg, "-dynamic-linker") && argv[1]) - { - ++argv; - *ld1++ = *ld2++ = *argv; - } - break; - - case 'f': - if (strncmp (arg, "-flto", 5) == 0) - { -#ifdef ENABLE_LTO - /* Do not pass LTO flag to the linker. */ - ld1--; - ld2--; -#else - error ("LTO support has not been enabled in this " - "configuration"); -#endif - } - else if (!use_collect_ld - && strncmp (arg, "-fuse-ld=", 9) == 0) - { - /* Do not pass -fuse-ld={bfd|gold} to the linker. */ - ld1--; - ld2--; - } -#ifdef TARGET_AIX_VERSION - else - { - /* File containing a list of input files to process. */ - - FILE *stream; - char buf[MAXPATHLEN + 2]; - /* Number of additionnal object files. */ - int add_nbr = 0; - /* Maximum of additionnal object files before vector - expansion. */ - int add_max = 0; - const char *list_filename = arg + 2; - - /* Accept -fFILENAME and -f FILENAME. */ - if (*list_filename == '\0' && argv[1]) - { - ++argv; - list_filename = *argv; - *ld1++ = *ld2++ = *argv; - } - - stream = fopen (list_filename, "r"); - if (stream == NULL) - fatal_error ("can't open %s: %m", list_filename); - - while (fgets (buf, sizeof buf, stream) != NULL) - { - /* Remove end of line. */ - int len = strlen (buf); - if (len >= 1 && buf[len - 1] =='\n') - buf[len - 1] = '\0'; - - /* Put on object vector. - Note: we only expanse vector here, so we must keep - extra space for remaining arguments. */ - if (add_nbr >= add_max) - { - int pos = - object - CONST_CAST2 (const char **, char **, - object_lst); - add_max = (add_max == 0) ? 16 : add_max * 2; - object_lst = XRESIZEVEC (char *, object_lst, - object_nbr + add_max); - object = CONST_CAST2 (const char **, char **, - object_lst) + pos; - object_nbr += add_max; - } - *object++ = xstrdup (buf); - add_nbr++; - } - fclose (stream); - } -#endif - 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; -#endif - - case 'o': - if (arg[2] == '\0') - output_file = *ld1++ = *ld2++ = *++argv; - else - 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 = true; - break; - - case '-': - if (strcmp (arg, "--no-demangle") == 0) - { -#ifndef HAVE_LD_DEMANGLE - no_demangle = 1; - ld1--; - ld2--; -#endif - } - else if (strncmp (arg, "--demangle", 10) == 0) - { -#ifndef HAVE_LD_DEMANGLE - no_demangle = 0; - 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; - } - ld1--; - ld2--; -#endif - } - else if (strncmp (arg, "--sysroot=", 10) == 0) - target_system_root = arg + 10; - else if (strcmp (arg, "--version") == 0) - vflag = true; - else if (strcmp (arg, "--help") == 0) - helpflag = true; - 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. Unless - we are building a shared object, ignore the eh frame tables, as we - would otherwise reference them all, hence drag all the corresponding - objects even if nothing else is referenced. */ - { - const char **export_object_lst - = CONST_CAST2 (const char **, char **, object_lst); - - struct id *list = libs.first; - - /* Compute the filter to use from the current one, do scan, then adjust - the "current" filter to remove what we just included here. This will - control whether we need a first pass link later on or not, and what - will remain to be scanned there. */ - - scanfilter this_filter = ld1_filter; -#if HAVE_AS_REF - if (!shared_obj) - this_filter &= ~SCAN_DWEH; -#endif - - while (export_object_lst < object) - scan_prog_file (*export_object_lst++, PASS_OBJ, this_filter); - - for (; list; list = list->next) - scan_prog_file (list->name, PASS_FIRST, this_filter); - - ld1_filter = ld1_filter & ~this_filter; - } - - if (exports.first) - { - char *buf = concat ("-bE:", export_file, NULL); - - *ld1++ = buf; - *ld2++ = buf; - - exportf = fopen (export_file, "w"); - if (exportf == (FILE *) 0) - fatal_error ("fopen %s: %m", export_file); - write_aix_file (exportf, exports.first); - if (fclose (exportf)) - fatal_error ("fclose %s: %m", export_file); - } -#endif - - *c_ptr++ = c_file; - *c_ptr = *ld1 = *object = (char *) 0; - - if (vflag) - notice ("collect2 version %s\n", version_string); - - if (helpflag) - { - printf ("Usage: collect2 [options]\n"); - printf (" Wrap linker and generate constructor code if needed.\n"); - printf (" Options:\n"); - printf (" -debug Enable debug output\n"); - printf (" --help Display this information\n"); - printf (" -v, --version Display this program's version number\n"); - printf ("\n"); - printf ("Overview: http://gcc.gnu.org/onlinedocs/gccint/Collect2.html\n"); - printf ("Report bugs: %s\n", bug_report_url); - printf ("\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. - - If -r or they will be run via some other method, do not build the - constructor or destructor list, just return now. */ - { - bool early_exit - = rflag || (! DO_COLLECT_EXPORT_LIST && ! do_collecting); - - /* Perform the first pass link now, if we're about to exit or if we need - to scan for things we haven't collected yet before pursuing further. - - On AIX, the latter typically includes nothing for shared objects or - frame tables for an executable, out of what the required early scan on - objects and libraries has performed above. In the !shared_obj case, we - expect the relevant tables to be dragged together with their associated - functions from precise cross reference insertions by the compiler. */ - - if (early_exit || ld1_filter != SCAN_NOTHING) - do_tlink (ld1_argv, object_lst); - - if (early_exit) - { -#ifdef COLLECT_EXPORT_LIST - /* Make sure we delete the export file we may have created. */ - if (export_file != 0 && export_file[0]) - maybe_unlink (export_file); -#endif - if (lto_mode != LTO_MODE_NONE) - maybe_run_lto_and_relink (ld1_argv, object_lst, object, false); - else - post_ld_pass (false); - - maybe_unlink (c_file); - maybe_unlink (o_file); - return 0; - } - } - - /* Unless we have done it all already, examine the namelist and search for - static constructors and destructors to call. Write the constructor and - destructor tables to a .s file and reload. */ - - if (ld1_filter != SCAN_NOTHING) - scan_prog_file (output_file, PASS_FIRST, ld1_filter); - -#ifdef SCAN_LIBRARIES - scan_libraries (output_file); -#endif - - if (debug) - { - notice_translated (ngettext ("%d constructor found\n", - "%d constructors found\n", - constructors.number), - constructors.number); - notice_translated (ngettext ("%d destructor found\n", - "%d destructors found\n", - destructors.number), - destructors.number); - notice_translated (ngettext("%d frame table found\n", - "%d frame tables found\n", - frame_tables.number), - frame_tables.number); - } - - /* If the scan exposed nothing of special interest, there's no need to - generate the glue code and relink so return now. */ - - 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 - ) - { - /* Do tlink without additional code generation now if we didn't - do it earlier for scanning purposes. */ - if (ld1_filter == SCAN_NOTHING) - do_tlink (ld1_argv, object_lst); - - if (lto_mode) - maybe_run_lto_and_relink (ld1_argv, object_lst, object, false); - - /* 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_CAST2 (const char **, 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 - post_ld_pass (false); - - 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_error ("fopen %s: %m", c_file); - - write_c_file (outf, c_file); - - if (fclose (outf)) - fatal_error ("fclose %s: %m", 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_error ("fopen %s: %m", export_file); - write_aix_file (exportf, exports.first); - if (fclose (exportf)) - fatal_error ("fclose %s: %m", 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); - - if (lto_mode) - maybe_run_lto_and_relink (ld2_argv, object_lst, object, false); -#else - /* Otherwise, simply call ld because tlink is already done. */ - if (lto_mode) - maybe_run_lto_and_relink (ld2_argv, object_lst, object, true); - else - { - fork_execute ("ld", ld2_argv); - post_ld_pass (false); - } - - /* 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, SCAN_ALL); -#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_error ("can't get program status: %m"); - 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); - } - - if (response_file) - { - unlink (response_file); - response_file = NULL; - } -} - - -/* Execute a program, and wait for the reply. */ - -struct pex_obj * -collect_execute (const char *prog, char **argv, const char *outname, - const char *errname, int flags) -{ - struct pex_obj *pex; - const char *errmsg; - int err; - char *response_arg = NULL; - char *response_argv[3] ATTRIBUTE_UNUSED; - - if (HAVE_GNU_LD && at_file_supplied && argv[0] != NULL) - { - /* If using @file arguments, create a temporary file and put the - contents of argv into it. Then change argv to an array corresponding - to a single argument @FILE, where FILE is the temporary filename. */ - - char **current_argv = argv + 1; - char *argv0 = argv[0]; - int status; - FILE *f; - - /* Note: we assume argv contains at least one element; this is - checked above. */ - - response_file = make_temp_file (""); - - f = fopen (response_file, "w"); - - if (f == NULL) - fatal_error ("could not open response file %s", response_file); - - status = writeargv (current_argv, f); - - if (status) - fatal_error ("could not write to response file %s", response_file); - - status = fclose (f); - - if (EOF == status) - fatal_error ("could not close response file %s", response_file); - - response_arg = concat ("@", response_file, NULL); - response_argv[0] = argv0; - response_argv[1] = response_arg; - response_argv[2] = NULL; - - argv = response_argv; - } - - 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_error ("cannot find '%s'", prog); - - pex = pex_init (0, "collect2", NULL); - if (pex == NULL) - fatal_error ("pex_init failed: %m"); - - errmsg = pex_run (pex, flags, argv[0], argv, outname, - errname, &err); - if (errmsg != NULL) - { - if (err != 0) - { - errno = err; - fatal_error ("%s: %m", _(errmsg)); - } - else - fatal_error (errmsg); - } - - free (response_arg); - - return pex; -} - -static void -fork_execute (const char *prog, char **argv) -{ - struct pex_obj *pex; - - pex = collect_execute (prog, argv, NULL, NULL, PEX_LAST | PEX_SEARCH); - do_wait (prog, pex); -} - -/* Unlink FILE unless we are debugging or this is the output_file - and we may not unlink it. */ - -static void -maybe_unlink (const char *file) -{ - if (debug) - { - notice ("[Leaving %s]\n", file); - return; - } - - if (file == output_file && !may_unlink_output_file) - return; - - unlink_if_ordinary (file); -} - -/* Call maybe_unlink on the NULL-terminated list, FILE_LIST. */ - -static void -maybe_unlink_list (char **file_list) -{ - char **tmp = file_list; - - while (*tmp) - maybe_unlink (*(tmp++)); -} - - -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 - = (struct id *) 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; - } -} - -#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. */ - q = p = lbasename (output_file); - - while (q) - { - q = strchr (q,'.'); - if (q == 0) - { - q = p + strlen (p); - break; - } - else - { - if (filename_ncmp (q, SHLIB_SUFFIX, strlen (SHLIB_SUFFIX)) == 0) - { - q += strlen (SHLIB_SUFFIX); - 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) -{ -#ifndef LD_INIT_SWITCH - if (! shared_obj) - write_c_file_glob (stream, name); - else -#endif - write_c_file_stat (stream, name); -} - -#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 - -/* Check to make sure the file is an LTO object file. */ - -static bool -maybe_lto_object_file (const char *prog_name) -{ - FILE *f; - unsigned char buf[4]; - int i; - - static unsigned char elfmagic[4] = { 0x7f, 'E', 'L', 'F' }; - static unsigned char coffmagic[2] = { 0x4c, 0x01 }; - static unsigned char coffmagic_x64[2] = { 0x64, 0x86 }; - static unsigned char machomagic[4][4] = { - { 0xcf, 0xfa, 0xed, 0xfe }, - { 0xce, 0xfa, 0xed, 0xfe }, - { 0xfe, 0xed, 0xfa, 0xcf }, - { 0xfe, 0xed, 0xfa, 0xce } - }; - - f = fopen (prog_name, "rb"); - if (f == NULL) - return false; - if (fread (buf, sizeof (buf), 1, f) != 1) - buf[0] = 0; - fclose (f); - - if (memcmp (buf, elfmagic, sizeof (elfmagic)) == 0 - || memcmp (buf, coffmagic, sizeof (coffmagic)) == 0 - || memcmp (buf, coffmagic_x64, sizeof (coffmagic_x64)) == 0) - return true; - for (i = 0; i < 4; i++) - if (memcmp (buf, machomagic[i], sizeof (machomagic[i])) == 0) - return true; - - return false; -} - -/* Generic version to scan the name list of the loaded program for - the symbols g++ uses for static constructors and destructors. */ - -static void -scan_prog_file (const char *prog_name, scanpass which_pass, - scanfilter filter) -{ - void (*int_handler) (int); -#ifdef SIGQUIT - void (*quit_handler) (int); -#endif - char *real_nm_argv[4]; - const char **nm_argv = CONST_CAST2 (const char **, char**, real_nm_argv); - int argc = 0; - struct pex_obj *pex; - const char *errmsg; - int err; - char *p, buf[1024]; - FILE *inf; - int found_lto = 0; - - if (which_pass == PASS_SECOND) - return; - - /* LTO objects must be in a known format. This check prevents - us from accepting an archive containing LTO objects, which - gcc cannot currently handle. */ - if (which_pass == PASS_LTOINFO && !maybe_lto_object_file (prog_name)) - return; - - /* If we do not have an `nm', complain. */ - if (nm_file_name == 0) - fatal_error ("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_error ("pex_init failed: %m"); - - errmsg = pex_run (pex, 0, nm_file_name, real_nm_argv, NULL, HOST_BIT_BUCKET, - &err); - if (errmsg != NULL) - { - if (err != 0) - { - errno = err; - fatal_error ("%s: %m", _(errmsg)); - } - else - fatal_error (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_error ("can't open nm output: %m"); - - if (debug) - { - if (which_pass == PASS_LTOINFO) - fprintf (stderr, "\nnm output with LTO info marker symbol.\n"); - else - 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 (debug) - fprintf (stderr, "\t%s\n", buf); - - if (which_pass == PASS_LTOINFO) - { - if (found_lto) - continue; - - /* Look for the LTO info marker symbol, and add filename to - the LTO objects list if found. */ - for (p = buf; (ch = *p) != '\0' && ch != '\n'; p++) - if (ch == ' ' && p[1] == '_' && p[2] == '_' - && (strncmp (p + (p[3] == '_' ? 2 : 1), "__gnu_lto_v1", 12) == 0) - && ISSPACE (p[p[3] == '_' ? 14 : 13])) - { - add_lto_object (<o_objects, prog_name); - - /* We need to read all the input, so we can't just - return here. But we can avoid useless work. */ - found_lto = 1; - - break; - } - - continue; - } - - /* If it contains a constructor or destructor name, add the name - to the appropriate list unless this is a kind of symbol we're - not supposed to even consider. */ - - 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 SYM_CTOR: - if (! (filter & SCAN_CTOR)) - break; - if (which_pass != PASS_LIB) - add_to_list (&constructors, name); - break; - - case SYM_DTOR: - if (! (filter & SCAN_DTOR)) - break; - if (which_pass != PASS_LIB) - add_to_list (&destructors, name); - break; - - case SYM_INIT: - if (! (filter & SCAN_INIT)) - break; - if (which_pass != PASS_LIB) - fatal_error ("init function found in object %s", prog_name); -#ifndef LD_INIT_SWITCH - add_to_list (&constructors, name); -#endif - break; - - case SYM_FINI: - if (! (filter & SCAN_FINI)) - break; - if (which_pass != PASS_LIB) - fatal_error ("fini function found in object %s", prog_name); -#ifndef LD_FINI_SWITCH - add_to_list (&destructors, name); -#endif - break; - - case SYM_DWEH: - if (! (filter & SCAN_DWEH)) - break; - if (which_pass != PASS_LIB) - add_to_list (&frame_tables, name); - break; - - default: /* not a constructor or destructor */ - continue; - } - } - - 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_CAST2 (const char **, 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_error ("pex_init failed: %m"); - - errmsg = pex_run (pex, 0, ldd_file_name, real_ldd_argv, NULL, NULL, &err); - if (errmsg != NULL) - { - if (err != 0) - { - errno = err; - fatal_error ("%s: %m", _(errmsg)); - } - else - fatal_error (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_error ("can't open ldd output: %m"); - - 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_error ("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_error ("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, SCAN_ALL); -} - -#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) */ -#if TARGET_AIX_VERSION >= 51 -# define GCC_CHECK_HDR(X) \ - (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \ - || (HEADER (X).f_magic == 0767 && aix64_flag)) \ - && !(HEADER (X).f_flags & F_LOADONLY)) -#else -# define GCC_CHECK_HDR(X) \ - (((HEADER (X).f_magic == U802TOCMAGIC && ! aix64_flag) \ - || (HEADER (X).f_magic == 0757 && aix64_flag)) \ - && !(HEADER (X).f_flags & F_LOADONLY)) -#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; - size_t length; - - if (target_system_root[0] != '\0') - { - length = strlen (target_system_root); - if (strncmp (name, target_system_root, length) != 0) - return 0; - name += length; - } - for (p = &aix_std_libs[0]; *p != NULL; ++p) - if (strcmp (name, *p) == 0) - 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. */ - -static void -scan_prog_file (const char *prog_name, scanpass which_pass, - scanfilter filter) -{ - 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, - using CONST_CAST to prevent complaints from -Wcast-qual. */ - if ((ldptr = ldopen (CONST_CAST (char *, prog_name), ldptr)) != NULL) - { - if (! MY_ISCOFF (HEADER (ldptr).f_magic)) - fatal_error ("%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 SYM_CTOR: - if (! (filter & SCAN_CTOR)) - break; - 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 SYM_DTOR: - if (! (filter & SCAN_DTOR)) - break; - 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 SYM_INIT: - if (! (filter & SCAN_INIT)) - break; -#ifndef LD_INIT_SWITCH - if (is_shared) - add_to_list (&constructors, name); -#endif - break; - - case SYM_FINI: - if (! (filter & SCAN_FINI)) - break; -#ifndef LD_INIT_SWITCH - if (is_shared) - add_to_list (&destructors, name); -#endif - break; -#endif - - case SYM_DWEH: - if (! (filter & SCAN_DWEH)) - break; - 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_error ("%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 = XNEWVEC (char, 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 DIR_SEPARATOR and - without it. */ - const char *p = ""; - if (!IS_DIR_SEPARATOR (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_error ("library lib%s not found", name); - return (NULL); -} -#endif /* COLLECT_EXPORT_LIST */ - -#ifdef COLLECT_RUN_DSYMUTIL -static int flag_dsym = false; -static int flag_idsym = false; - -static void -process_args (int *argcp, char **argv) { - int i, j; - int argc = *argcp; - for (i=0; i<argc; ++i) - { - if (strcmp (argv[i], "-dsym") == 0) - { - flag_dsym = true; - /* Remove the flag, as we handle all processing for it. */ - j = i; - do - argv[j] = argv[j+1]; - while (++j < argc); - --i; - argc = --(*argcp); - } - else if (strcmp (argv[i], "-idsym") == 0) - { - flag_idsym = true; - /* Remove the flag, as we handle all processing for it. */ - j = i; - do - argv[j] = argv[j+1]; - while (++j < argc); - --i; - argc = --(*argcp); - } - } -} - -static void -do_dsymutil (const char *output_file) { - const char *dsymutil = DSYMUTIL + 1; - struct pex_obj *pex; - char **real_argv = XCNEWVEC (char *, 3); - const char ** argv = CONST_CAST2 (const char **, char **, - real_argv); - - argv[0] = dsymutil; - argv[1] = output_file; - argv[2] = (char *) 0; - - pex = collect_execute (dsymutil, real_argv, NULL, NULL, PEX_LAST | PEX_SEARCH); - do_wait (dsymutil, pex); -} - -static void -post_ld_pass (bool temp_file) { - if (!(temp_file && flag_idsym) && !flag_dsym) - return; - - do_dsymutil (output_file); -} -#else -static void -process_args (int *argcp ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) { } -static void post_ld_pass (bool temp_file ATTRIBUTE_UNUSED) { } -#endif |