| /* Collect static initialization info into data structures that can be |
| traversed by C++ initialization and finalization routines. |
| Copyright (C) 1992-2021 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" |
| #include "simple-object.h" |
| #include "lto-section-names.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 "collect-utils.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; |
| }; |
| |
| 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 */ |
| static int aixlazy_flag; /* true if -blazy */ |
| static int visibility_flag; /* true if -fvisibility */ |
| #endif |
| |
| enum lto_mode_d { |
| LTO_MODE_NONE, /* Not doing LTO. */ |
| LTO_MODE_LTO, /* Normal LTO. */ |
| LTO_MODE_WHOPR /* WHOPR. */ |
| }; |
| |
| /* Current LTO mode. */ |
| #ifdef ENABLE_LTO |
| static enum lto_mode_d lto_mode = LTO_MODE_WHOPR; |
| #else |
| static enum lto_mode_d lto_mode = LTO_MODE_NONE; |
| #endif |
| |
| bool helpflag; /* true if --help */ |
| |
| static int shared_obj; /* true if -shared */ |
| static int static_obj; /* true if -static */ |
| |
| 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. */ |
| 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 */ |
| |
| |
| #ifdef TARGET_AIX_VERSION |
| static char *aix_shared_initname; |
| static char *aix_shared_fininame; /* init/fini names as per the scheme |
| described in config/rs6000/aix.h */ |
| #endif |
| |
| 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 */ |
| |
| bool at_file_supplied; /* Whether to use @file arguments */ |
| |
| 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 head static_libs; /* list of statically linked 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. */ |
| |
| enum symkind { |
| 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 */ |
| SYM_AIXI = 6, |
| SYM_AIXD = 7 |
| }; |
| |
| const char tool_name[] = "collect2"; |
| |
| static symkind is_ctor_dtor (const char *); |
| |
| static void handler (int); |
| 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 |
| static int is_in_list (const char *, struct id *); |
| 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 ... */ |
| |
| enum scanpass { |
| 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 */ |
| }; |
| |
| /* ... 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_AIXI = 1 << SYM_AIXI, |
| SCAN_AIXD = 1 << SYM_AIXD, |
| 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 |
| tool_cleanup (bool from_signal) |
| { |
| /* maybe_unlink may call notice, which is not signal safe. */ |
| if (from_signal) |
| verbose = false; |
| |
| 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); |
| } |
| |
| static void |
| collect_atexit (void) |
| { |
| tool_cleanup (false); |
| } |
| |
| static void |
| handler (int signo) |
| { |
| tool_cleanup (true); |
| |
| signal (signo, SIG_DFL); |
| raise (signo); |
| } |
| /* 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); |
| } |
| |
| 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 *); |
| } |
| |
| /* 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 }, |
| #ifdef TARGET_AIX_VERSION |
| { "GLOBAL__AIXI_", sizeof ("GLOBAL__AIXI_")-1, SYM_AIXI, 0 }, |
| { "GLOBAL__AIXD_", sizeof ("GLOBAL__AIXD_")-1, SYM_AIXD, 0 }, |
| #endif |
| { 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 (input_location, "environment variable " |
| "%<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, |
| at_file_supplied, "lto_args"); |
| { |
| 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; |
| } |
| |
| /* signal handler may access uninitialized memory |
| and delete whatever it points to, if lto_o_files |
| is not allocated with calloc. */ |
| lto_o_files = XCNEWVEC (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 arguments |
| 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, HAVE_GNU_LD && at_file_supplied, |
| "ld_args"); |
| /* We assume that temp files were created, and therefore we need to take |
| that into account (maybe run dsymutil). */ |
| post_ld_pass (/*temp_file*/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, HAVE_GNU_LD && at_file_supplied, |
| "ld_args"); |
| /* No LTO objects were found, so no new temp file. */ |
| post_ld_pass (/*temp_file*/false); |
| } |
| else |
| post_ld_pass (false); /* No LTO objects were found, no temp file. */ |
| } |
| /* Entry point for linker invoation. Called from main in collect2.c. |
| LD_ARGV is an array of arguments for the linker. */ |
| |
| static void |
| do_link (char **ld_argv, const char *atsuffix) |
| { |
| struct pex_obj *pex; |
| const char *prog = "ld"; |
| pex = collect_execute (prog, ld_argv, NULL, NULL, |
| PEX_LAST | PEX_SEARCH, |
| HAVE_GNU_LD && at_file_supplied, atsuffix); |
| int ret = collect_wait (prog, pex); |
| if (ret) |
| { |
| error ("ld returned %d exit status", ret); |
| exit (ret); |
| } |
| else |
| { |
| /* We have just successfully produced an output file, so assume that we |
| may unlink it if need be for now on. */ |
| may_unlink_output_file = true; |
| } |
| } |
| |
| /* Main program. */ |
| |
| int |
| main (int argc, char **argv) |
| { |
| enum linker_select |
| { |
| USE_DEFAULT_LD, |
| USE_PLUGIN_LD, |
| USE_GOLD_LD, |
| USE_BFD_LD, |
| USE_LLD_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", |
| "ld.lld" |
| }; |
| 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; |
| #ifdef COLLECT_EXPORT_LIST |
| bool is_static = false; |
| #endif |
| 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); |
| |
| if (atexit (collect_atexit) != 0) |
| fatal_error (input_location, "atexit failed"); |
| |
| /* 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 = true; |
| #endif |
| |
| save_temps = false; |
| verbose = false; |
| |
| #ifndef DEFAULT_A_OUT_NAME |
| output_file = "a.out"; |
| #else |
| output_file = DEFAULT_A_OUT_NAME; |
| #endif |
| |
| /* Parse command line / environment for flags we want early. |
| This allows the debug flag to be set before functions like find_a_file() |
| are called. */ |
| { |
| bool no_partition = false; |
| |
| for (i = 1; argv[i] != NULL; i ++) |
| { |
| if (! strcmp (argv[i], "-debug")) |
| debug = true; |
| else if (!strncmp (argv[i], "-fno-lto", 8)) |
| lto_mode = LTO_MODE_NONE; |
| else if (! strcmp (argv[i], "-plugin")) |
| { |
| use_plugin = true; |
| 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; |
| else if (strcmp (argv[i], "-fuse-ld=lld") == 0) |
| selected_linker = USE_LLD_LD; |
| else if (strncmp (argv[i], "-o", 2) == 0) |
| { |
| /* Parse the output filename if it's given so that we can make |
| meaningful temp filenames. */ |
| if (argv[i][2] != '\0') |
| output_file = &argv[i][2]; |
| else if (argv[i+1] != NULL) |
| output_file = argv[++i]; |
| } |
| |
| #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; |
| else if (strcmp (argv[i], "-blazy") == 0) |
| aixlazy_flag = 1; |
| #endif |
| } |
| |
| obstack_begin (&temporary_obstack, 0); |
| temporary_firstobj = (char *) obstack_alloc (&temporary_obstack, 0); |
| |
| #ifndef HAVE_LD_DEMANGLE |
| current_demangling_style = auto_demangling; |
| #endif |
| |
| /* Now pick up any flags we want early from COLLECT_GCC_OPTIONS |
| The LTO options are passed here as are other options that might |
| be unsuitable for ld (e.g. -save-temps). */ |
| 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++; |
| if (strncmp (q, "-flto-partition=none", 20) == 0) |
| no_partition = true; |
| else if (strncmp (q, "-fno-lto", 8) == 0) |
| lto_mode = LTO_MODE_NONE; |
| else if (strncmp (q, "-save-temps", 11) == 0) |
| /* FIXME: Honour =obj. */ |
| save_temps = true; |
| else if (strcmp (q, "-dumpdir") == 0) |
| dumppfx = xstrdup (extract_string (&p)); |
| else if (strcmp (q, "-o") == 0 |
| || strcmp (q, "-B") == 0 |
| || strcmp (q, "-isystem") == 0) |
| (void) extract_string (&p); |
| } |
| obstack_free (&temporary_obstack, temporary_firstobj); |
| |
| verbose = verbose || debug; |
| save_temps = save_temps || debug; |
| find_file_set_debug (debug); |
| if (use_plugin) |
| lto_mode = LTO_MODE_NONE; |
| if (no_partition && lto_mode == LTO_MODE_WHOPR) |
| lto_mode = LTO_MODE_LTO; |
| } |
| |
| /* -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 (input_location, "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 (selected_linker == USE_BFD_LD || selected_linker == USE_GOLD_LD || |
| selected_linker == USE_LLD_LD) |
| { |
| char *linker_name; |
| # ifdef HOST_EXECUTABLE_SUFFIX |
| int len = (sizeof (DEFAULT_LINKER) |
| - sizeof (HOST_EXECUTABLE_SUFFIX)); |
| linker_name = NULL; |
| if (len > 0) |
| { |
| char *default_linker = xstrdup (DEFAULT_LINKER); |
| /* Strip HOST_EXECUTABLE_SUFFIX if DEFAULT_LINKER contains |
| HOST_EXECUTABLE_SUFFIX. */ |
| if (! strcmp (&default_linker[len], HOST_EXECUTABLE_SUFFIX)) |
| { |
| default_linker[len] = '\0'; |
| linker_name = concat (default_linker, |
| &ld_suffixes[selected_linker][2], |
| HOST_EXECUTABLE_SUFFIX, NULL); |
| } |
| } |
| if (linker_name == NULL) |
| # endif |
| linker_name = concat (DEFAULT_LINKER, |
| &ld_suffixes[selected_linker][2], |
| NULL); |
| if (access (linker_name, X_OK) == 0) |
| ld_file_name = linker_name; |
| } |
| if (ld_file_name == 0 && 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, X_OK); |
| if (ld_file_name == 0) |
| #endif |
| /* Search the (target-specific) compiler dirs for ld'. */ |
| ld_file_name = find_a_file (&cpath, real_ld_suffix, X_OK); |
| /* Likewise for `collect-ld'. */ |
| if (ld_file_name == 0) |
| { |
| ld_file_name = find_a_file (&cpath, collect_ld_suffix, X_OK); |
| 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], X_OK); |
| /* 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], X_OK); |
| |
| #ifdef REAL_NM_FILE_NAME |
| nm_file_name = find_a_file (&path, REAL_NM_FILE_NAME, X_OK); |
| if (nm_file_name == 0) |
| #endif |
| nm_file_name = find_a_file (&cpath, gnm_suffix, X_OK); |
| if (nm_file_name == 0) |
| nm_file_name = find_a_file (&path, full_gnm_suffix, X_OK); |
| if (nm_file_name == 0) |
| nm_file_name = find_a_file (&cpath, nm_suffix, X_OK); |
| if (nm_file_name == 0) |
| nm_file_name = find_a_file (&path, full_nm_suffix, X_OK); |
| |
| #ifdef LDD_SUFFIX |
| ldd_file_name = find_a_file (&cpath, ldd_suffix, X_OK); |
| if (ldd_file_name == 0) |
| ldd_file_name = find_a_file (&path, full_ldd_suffix, X_OK); |
| #endif |
| |
| #ifdef REAL_STRIP_FILE_NAME |
| strip_file_name = find_a_file (&path, REAL_STRIP_FILE_NAME, X_OK); |
| if (strip_file_name == 0) |
| #endif |
| strip_file_name = find_a_file (&cpath, gstrip_suffix, X_OK); |
| if (strip_file_name == 0) |
| strip_file_name = find_a_file (&path, full_gstrip_suffix, X_OK); |
| if (strip_file_name == 0) |
| strip_file_name = find_a_file (&cpath, strip_suffix, X_OK); |
| if (strip_file_name == 0) |
| strip_file_name = find_a_file (&path, full_strip_suffix, X_OK); |
| |
| /* 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, X_OK); |
| |
| /* 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, X_OK); |
| |
| if (p) |
| c_file_name = p; |
| |
| *ld1++ = *ld2++ = ld_file_name; |
| |
| /* Make temp file names. */ |
| if (save_temps) |
| { |
| c_file = concat (output_file, ".cdtor.c", NULL); |
| o_file = concat (output_file, ".cdtor.o", NULL); |
| #ifdef COLLECT_EXPORT_LIST |
| export_file = concat (output_file, ".x", NULL); |
| #endif |
| } |
| else |
| { |
| c_file = make_temp_file (".cdtor.c"); |
| o_file = make_temp_file (".cdtor.o"); |
| #ifdef COLLECT_EXPORT_LIST |
| export_file = make_temp_file (".x"); |
| #endif |
| } |
| /* Build the command line to compile the ctor/dtor list. */ |
| *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 (strcmp (q, "-static") == 0) |
| static_obj = 1; |
| if (*q == '-' && q[1] == 'B') |
| { |
| *c_ptr++ = xstrdup (q); |
| if (q[2] == 0) |
| { |
| q = extract_string (&p); |
| *c_ptr++ = xstrdup (q); |
| } |
| } |
| else if (strcmp (q, "-o") == 0 |
| || strcmp (q, "-dumpdir") == 0 |
| || strcmp (q, "-isystem") == 0) |
| (void) extract_string (&p); |
| #ifdef COLLECT_EXPORT_LIST |
| /* Detect any invocation with -fvisibility. */ |
| if (strncmp (q, "-fvisibility", 12) == 0) |
| visibility_flag = 1; |
| #endif |
| } |
| 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. */ |
| |
| #ifdef COLLECT_EXPORT_LIST |
| is_static = static_obj; |
| #endif |
| 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|lld} to the linker. */ |
| ld1--; |
| ld2--; |
| } |
| else if (strncmp (arg, "-fno-lto", 8) == 0) |
| { |
| /* Do not pass -fno-lto 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 (input_location, "cannot 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; |
| |
| #ifdef COLLECT_EXPORT_LIST |
| case 'b': |
| if (!strcmp (arg, "-bstatic")) |
| { |
| is_static = true; |
| } |
| else if (!strcmp (arg, "-bdynamic") || !strcmp (arg, "-bshared")) |
| { |
| is_static = false; |
| } |
| break; |
| #endif |
| 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); |
| if (is_static) |
| add_to_list (&static_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 = &arg[2]; |
| else if (argv[1]) |
| output_file = *ld1++ = *ld2++ = *++argv; |
| 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') |
| verbose = 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 %qs", 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) |
| verbose = 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); |
| if (is_static) |
| add_to_list (&static_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); |
| fprintf (stderr, "List of statically linked libraries:\n"); |
| dump_list (stderr, "\t", static_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 |
| |
| /* Scan object files. */ |
| while (export_object_lst < object) |
| scan_prog_file (*export_object_lst++, PASS_OBJ, this_filter); |
| |
| /* Scan libraries. */ |
| 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 (input_location, "fopen %s: %m", export_file); |
| write_aix_file (exportf, exports.first); |
| if (fclose (exportf)) |
| fatal_error (input_location, "fclose %s: %m", export_file); |
| } |
| #endif |
| |
| *c_ptr++ = c_file; |
| *c_ptr = *ld1 = *object = (char *) 0; |
| |
| if (verbose) |
| 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: https://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_link (ld1_argv, "ld1_args"); |
| |
| 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 (/*temp_file*/false); |
| |
| 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 link without additional code generation now if we didn't |
| do it earlier for scanning purposes. */ |
| if (ld1_filter == SCAN_NOTHING) |
| do_link (ld1_argv, "ld1_args"); |
| |
| 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, false, NULL); |
| } |
| |
| #ifdef COLLECT_EXPORT_LIST |
| maybe_unlink (export_file); |
| #endif |
| post_ld_pass (/*temp_file*/false); |
| 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 (input_location, "fopen %s: %m", c_file); |
| |
| write_c_file (outf, c_file); |
| |
| if (fclose (outf)) |
| fatal_error (input_location, "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); |
| |
| #ifdef TARGET_AIX_VERSION |
| add_to_list (&exports, aix_shared_initname); |
| add_to_list (&exports, aix_shared_fininame); |
| #endif |
| |
| #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 (input_location, "fopen %s: %m", export_file); |
| write_aix_file (exportf, exports.first); |
| if (fclose (exportf)) |
| fatal_error (input_location, "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, at_file_supplied, "gcc_args"); |
| #ifdef COLLECT_EXPORT_LIST |
| /* On AIX we must call link because of possible templates resolution. */ |
| do_link (ld2_argv, "ld2_args"); |
| |
| if (lto_mode) |
| maybe_run_lto_and_relink (ld2_argv, object_lst, object, false); |
| #else |
| /* Otherwise, simply call ld because link is already done. */ |
| if (lto_mode) |
| maybe_run_lto_and_relink (ld2_argv, object_lst, object, true); |
| else |
| { |
| fork_execute ("ld", ld2_argv, HAVE_GNU_LD && at_file_supplied, "ld_args"); |
| post_ld_pass (/*temp_file*/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 |
| |
| return 0; |
| } |
| |
| |
| /* Unlink FILE unless we are debugging or this is the output_file |
| and we may not unlink it. */ |
| |
| void |
| maybe_unlink (const char *file) |
| { |
| if (save_temps && file_exists (file)) |
| { |
| if (verbose) |
| 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; |
| |
| #ifdef TARGET_AIX_VERSION |
| /* Run dependent module initializers before any constructors in this |
| module. */ |
| switch (is_ctor_dtor (name)) |
| { |
| case SYM_AIXI: |
| case SYM_AIXD: |
| return INT_MIN; |
| default: |
| break; |
| } |
| #endif |
| |
| 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. */ |
| 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 /* 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); |
| #ifdef TARGET_AIX_VERSION |
| aix_shared_initname = concat ("_GLOBAL__AIXI_", prefix, NULL); |
| aix_shared_fininame = concat ("_GLOBAL__AIXD_", prefix, NULL); |
| #endif |
| |
| free (prefix); |
| |
| /* Write the tables as C code. */ |
| |
| /* This count variable is used to prevent multiple calls to the |
| constructors/destructors. |
| This guard against multiple calls is important on AIX as the initfini |
| functions are deliberately invoked multiple times as part of the |
| mechanisms GCC uses to order constructors across different dependent |
| shared libraries (see config/rs6000/aix.h). |
| */ |
| 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_bases (void *, struct object *, void *tbase, void *dbase);\n"); |
| fprintf (stream, "extern void __register_frame_info_table (void *, struct object *);\n"); |
| fprintf (stream, "extern void *__deregister_frame_info (void *);\n"); |
| #ifdef TARGET_AIX_VERSION |
| fprintf (stream, "extern void *__gcc_unwind_dbase;\n"); |
| #endif |
| |
| fprintf (stream, "static void reg_frame () {\n"); |
| fprintf (stream, "\tstatic struct object ob;\n"); |
| #ifdef TARGET_AIX_VERSION |
| /* Use __gcc_unwind_dbase as the base address for data on AIX. |
| This might not be the start of the segment, signed offsets assumed. |
| */ |
| fprintf (stream, "\t__register_frame_info_table_bases (frame_table, &ob, (void *)0, &__gcc_unwind_dbase);\n"); |
| #else |
| fprintf (stream, "\t__register_frame_info_table (frame_table, &ob);\n"); |
| #endif |
| fprintf (stream, "\t}\n"); |
| |
| fprintf (stream, "static void dereg_frame () {\n"); |
| fprintf (stream, "\t__deregister_frame_info (frame_table);\n"); |
| fprintf (stream, "\t}\n"); |
| } |
| |
| #ifdef COLLECT_EXPORT_LIST |
| /* Set visibility of initializers to default. */ |
| if (visibility_flag) |
| fprintf (stream, "#pragma GCC visibility push(default)\n"); |
| #endif |
| 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"); |
| #ifdef COLLECT_EXPORT_LIST |
| if (visibility_flag) |
| fprintf (stream, "#pragma GCC visibility pop\n"); |
| #endif |
| |
| if (shared_obj) |
| { |
| #ifdef COLLECT_EXPORT_LIST |
| /* Set visibility of initializers to default. */ |
| if (visibility_flag) |
| fprintf (stream, "#pragma GCC visibility push(default)\n"); |
| #endif |
| COLLECT_SHARED_INIT_FUNC (stream, initname); |
| COLLECT_SHARED_FINI_FUNC (stream, fininame); |
| #ifdef COLLECT_EXPORT_LIST |
| if (visibility_flag) |
| fprintf (stream, "#pragma GCC visibility pop\n"); |
| #endif |
| } |
| } |
| |
| /* 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 int |
| has_lto_section (void *data, const char *name ATTRIBUTE_UNUSED, |
| off_t offset ATTRIBUTE_UNUSED, |
| off_t length ATTRIBUTE_UNUSED) |
| { |
| int *found = (int *) data; |
| |
| if (strncmp (name, LTO_SECTION_NAME_PREFIX, |
| sizeof (LTO_SECTION_NAME_PREFIX) - 1) != 0) |
| { |
| if (strncmp (name, OFFLOAD_SECTION_NAME_PREFIX, |
| sizeof (OFFLOAD_SECTION_NAME_PREFIX) - 1) != 0) |
| return 1; |
| } |
| |
| *found = 1; |
| |
| /* Stop iteration. */ |
| return 0; |
| } |
| |
| static bool |
| is_lto_object_file (const char *prog_name) |
| { |
| const char *errmsg; |
| int err; |
| int found = 0; |
| off_t inoff = 0; |
| int infd = open (prog_name, O_RDONLY | O_BINARY); |
| |
| if (infd == -1) |
| return false; |
| |
| simple_object_read *inobj = simple_object_start_read (infd, inoff, |
| LTO_SEGMENT_NAME, |
| &errmsg, &err); |
| if (!inobj) |
| return false; |
| |
| errmsg = simple_object_find_sections (inobj, has_lto_section, |
| (void *) &found, &err); |
| if (! errmsg && found) |
| return true; |
| |
| if (errmsg) |
| fatal_error (0, "%s: %s", errmsg, xstrerror (err)); |
| 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; |
| |
| 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) |
| { |
| if(is_lto_object_file (prog_name)) { |
| add_lto_object (<o_objects, prog_name); |
| } |
| return; |
| } |
| |
| /* If we do not have an `nm', complain. */ |
| if (nm_file_name == 0) |
| fatal_error (input_location, "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 (verbose) |
| { |
| 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 (input_location, "%<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 (input_location, "%s: %m", _(errmsg)); |
| } |
| else |
| fatal_error (input_location, 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 (input_location, "cannot open nm output: %m"); |
| |
| 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 (debug) |
| fprintf (stderr, "\t%s\n", buf); |
| |
| /* 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 (input_location, "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 (input_location, "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 (verbose) |
| { |
| 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 (input_location, "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 (input_location, "%s: %m", _(errmsg)); |
| } |
| else |
| fatal_error (input_location, 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 (input_location, "cannot 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 (input_location, "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 (input_location, "unable to open dynamic dependency " |
| "%qs", 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 |
| |
| # 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 |
| |
| #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)) |
| { |
| warning (0, "%s: not a COFF file", prog_name); |
| continue; |
| } |
| |
| 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)) |
| { |
| #if TARGET_AIX_VERSION |
| /* Add AIX shared library initalisers/finalisers |
| to the constructors/destructors list of the |
| current module. */ |
| case SYM_AIXI: |
| if (! (filter & SCAN_CTOR)) |
| break; |
| if (is_shared && !aixlazy_flag |
| #ifdef COLLECT_EXPORT_LIST |
| && ! static_obj |
| && ! is_in_list (prog_name, static_libs.first) |
| #endif |
| ) |
| add_to_list (&constructors, name); |
| break; |
| |
| case SYM_AIXD: |
| if (! (filter & SCAN_DTOR)) |
| break; |
| if (is_shared && !aixlazy_flag) |
| add_to_list (&destructors, name); |
| break; |
| #endif |
| |
| 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) |
| { |
| /* Do not auto-export __dso_handle or |
| __gcc_unwind_dbase. They are required |
| to be local to each module. */ |
| if (strcmp(name, "__dso_handle") != 0 |
| && strcmp(name, "__gcc_unwind_dbase") != 0) |
| { |
| add_to_list (&exports, name); |
| } |
| } |
| #endif |
| continue; |
| } |
| |
| if (debug) |
| 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); |
| } |
| } |
| } |
| #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 (input_location, "%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 (input_location, "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, false, NULL); |
| 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 |