diff options
Diffstat (limited to 'src/ld.c')
| -rw-r--r-- | src/ld.c | 360 |
1 files changed, 229 insertions, 131 deletions
@@ -1,15 +1,27 @@ -/* Copyright (C) 2001, 2002, 2003, 2004 Red Hat, Inc. +/* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Red Hat, Inc. + This file is part of Red Hat elfutils. Written by Ulrich Drepper <drepper@redhat.com>, 2001. - This program is Open Source software; you can redistribute it and/or - modify it under the terms of the Open Software License version 1.0 as - published by the Open Source Initiative. + Red Hat elfutils 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; version 2 of the License. - You should have received a copy of the Open Software License along - with this program; if not, you may obtain a copy of the Open Software - License version 1.0 from http://www.opensource.org/licenses/osl.php or - by writing the Open Source Initiative c/o Lawrence Rosen, Esq., - 3001 King Ranch Road, Ukiah, CA 95482. */ + Red Hat elfutils 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 Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + <http://www.openinventionnetwork.com>. */ #ifdef HAVE_CONFIG_H # include <config.h> @@ -38,6 +50,9 @@ static void print_version (FILE *stream, struct argp_state *state); void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version; +/* Bug report address. */ +const char *argp_program_bug_address = PACKAGE_BUGREPORT; + /* Values for the various options. */ enum @@ -47,7 +62,6 @@ enum ARGP_static, ARGP_dynamic, ARGP_pagesize, - ARGP_rpath, ARGP_rpath_link, ARGP_runpath, ARGP_runpath_link, @@ -56,6 +70,11 @@ enum ARGP_no_gc_sections, ARGP_no_undefined, ARGP_conserve, + ARGP_as_needed, + ARGP_no_as_needed, + ARGP_eh_frame_hdr, + ARGP_hash_style, + ARGP_build_id, #if YYDEBUG ARGP_yydebug, #endif @@ -65,119 +84,113 @@ enum /* Definitions of arguments for argp functions. */ static const struct argp_option options[] = { - /* XXX This list will be reordered and section names will be added. - Just not right now. */ + { NULL, 0, NULL, 0, N_("Input File Control:"), 0 }, { "whole-archive", ARGP_whole_archive, NULL, 0, - N_("Include whole archives in the output from now on.") }, + N_("Include whole archives in the output from now on."), 0 }, { "no-whole-archive", ARGP_no_whole_archive, NULL, 0, - N_("Stop including the whole arhives in the output.") }, - - { "output", 'o', N_("FILE"), 0, N_("Place output in FILE.") }, - - { NULL, 'O', N_("LEVEL"), OPTION_ARG_OPTIONAL, - N_("Set optimization level to LEVEL.") }, - - { "verbose", 'v', NULL, 0, N_("Verbose messages.") }, - { "trace", 't', NULL, 0, N_("Trace file opens.") }, - { "conserve-memory", ARGP_conserve, NULL, 0, - N_("Trade speed for less memory usage") }, - - { NULL, 'z', "KEYWORD", OPTION_HIDDEN, NULL }, + N_("Stop including the whole arhives in the output."), 0 }, + { NULL, 'l', N_("FILE"), OPTION_HIDDEN, NULL, 0 }, + { "start-group", '(', NULL, 0, N_("Start a group."), 0 }, + { "end-group", ')', NULL, 0, N_("End a group."), 0 }, + { NULL, 'L', N_("PATH"), 0, + N_("Add PATH to list of directories files are searched in."), 0 }, + { "as-needed", ARGP_as_needed, NULL, 0, + N_("Only set DT_NEEDED for following dynamic libs if actually used"), 0 }, + { "no-as-needed", ARGP_no_as_needed, NULL, 0, + N_("Always set DT_NEEDED for following dynamic libs"), 0 }, + { "rpath-link", ARGP_rpath_link, "PATH", OPTION_HIDDEN, NULL, 0 }, + { NULL, 'i', NULL, 0, N_("Ignore LD_LIBRARY_PATH environment variable."), + 0 }, + + { NULL, 0, NULL, 0, N_("Output File Control:"), 0 }, + { "output", 'o', N_("FILE"), 0, N_("Place output in FILE."), 0 }, + { NULL, 'z', "KEYWORD", OPTION_HIDDEN, NULL, 0 }, { "-z nodefaultlib", '\0', NULL, OPTION_DOC, - N_("Object is marked to not use default search path at runtime.") }, + N_("Object is marked to not use default search path at runtime."), 0 }, { "-z allextract", '\0', NULL, OPTION_DOC, - N_("Same as --whole-archive.") }, + N_("Same as --whole-archive."), 0 }, { "-z defaultextract", '\0', NULL, OPTION_DOC, N_("\ -Default rules of extracting from archive; weak references are not enough.") }, +Default rules of extracting from archive; weak references are not enough."), + 0 }, { "-z weakextract", '\0', NULL, OPTION_DOC, - N_("Weak references cause extraction from archive.") }, + N_("Weak references cause extraction from archive."), 0 }, { "-z muldefs", '\0', NULL, OPTION_DOC, - N_("Allow multiple definitions; first is used.") }, + N_("Allow multiple definitions; first is used."), 0 }, { "-z defs | nodefs", '\0', NULL, OPTION_DOC, - N_("Disallow/allow undefined symbols in DSOs.") }, - { "no-undefined", ARGP_no_undefined, NULL, OPTION_HIDDEN, NULL }, + N_("Disallow/allow undefined symbols in DSOs."), 0 }, + { "no-undefined", ARGP_no_undefined, NULL, OPTION_HIDDEN, NULL, 0 }, { "-z origin", '\0', NULL, OPTION_DOC, - N_("Object requires immediate handling of $ORIGIN.") }, + N_("Object requires immediate handling of $ORIGIN."), 0 }, { "-z now", '\0', NULL, OPTION_DOC, - N_("Relocation will not be processed lazily.") }, + N_("Relocation will not be processed lazily."), 0 }, { "-z nodelete", '\0', NULL, OPTION_DOC, - N_("Object cannot be unloaded at runtime.") }, + N_("Object cannot be unloaded at runtime."), 0 }, { "-z initfirst", '\0', NULL, OPTION_DOC, - N_("Mark object to be initialized first.") }, + N_("Mark object to be initialized first."), 0 }, { "-z lazyload | nolazyload", '\0', NULL, OPTION_DOC, - N_("Enable/disable lazy-loading flag for following dependencies.") }, + N_("Enable/disable lazy-loading flag for following dependencies."), 0 }, { "-z nodlopen", '\0', NULL, OPTION_DOC, - N_("Mark object as not loadable with 'dlopen'.") }, + N_("Mark object as not loadable with 'dlopen'."), 0 }, { "-z ignore | record", '\0', NULL, OPTION_DOC, - N_("Ignore/record dependencies on unused DSOs.") }, + N_("Ignore/record dependencies on unused DSOs."), 0 }, { "-z systemlibrary", '\0', NULL, OPTION_DOC, - N_("Generated DSO will be a system library.") }, - - { NULL, 'l', N_("FILE"), OPTION_HIDDEN, NULL }, - - { NULL, '(', NULL, 0, N_("Start a group.") }, - { NULL, ')', NULL, 0, N_("End a group.") }, - - { NULL, 'L', N_("PATH"), 0, - N_("Add PATH to list of directories files are searched in.") }, - - { NULL, 'c', N_("FILE"), 0, N_("Use linker script in FILE.") }, - - { "entry", 'e', N_("ADDRESS"), 0, N_("Set entry point address.") }, - - { "static", ARGP_static, NULL, OPTION_HIDDEN, NULL }, + N_("Generated DSO will be a system library."), 0 }, + { "entry", 'e', N_("ADDRESS"), 0, N_("Set entry point address."), 0 }, + { "static", ARGP_static, NULL, OPTION_HIDDEN, NULL, 0 }, { "-B static", ARGP_static, NULL, OPTION_DOC, - N_("Do not link against shared libraries.") }, - { "dynamic", ARGP_dynamic, NULL, OPTION_HIDDEN, NULL }, + N_("Do not link against shared libraries."), 0 }, + { "dynamic", ARGP_dynamic, NULL, OPTION_HIDDEN, NULL, 0 }, { "-B dynamic", ARGP_dynamic, NULL, OPTION_DOC, - N_("Prefer linking against shared libraries.") }, - - { "export-dynamic", 'E', NULL, 0, N_("Export all dynamic symbols.") }, - - { "strip-all", 's', NULL, 0, N_("Strip all symbols.") }, - { "strip-debug", 'S', NULL, 0, N_("Strip debugging symbols.") }, - + N_("Prefer linking against shared libraries."), 0 }, + { "export-dynamic", 'E', NULL, 0, N_("Export all dynamic symbols."), 0 }, + { "strip-all", 's', NULL, 0, N_("Strip all symbols."), 0 }, + { "strip-debug", 'S', NULL, 0, N_("Strip debugging symbols."), 0 }, { "pagesize", ARGP_pagesize, "SIZE", 0, - N_("Assume pagesize for the target system to be SIZE.") }, - - { "rpath", ARGP_rpath, "PATH", OPTION_HIDDEN, NULL }, - { "rpath-link", ARGP_rpath_link, "PATH", OPTION_HIDDEN, NULL }, - - { "runpath", ARGP_runpath, "PATH", 0, N_("Set runtime DSO search path.") }, + N_("Assume pagesize for the target system to be SIZE."), 0 }, + { "rpath", 'R', "PATH", OPTION_HIDDEN, NULL, 0 }, + { "runpath", ARGP_runpath, "PATH", 0, N_("Set runtime DSO search path."), + 0 }, { "runpath-link", ARGP_runpath_link, "PATH", 0, - N_("Set link time DSO search path.") }, - - { NULL, 'i', NULL, 0, N_("Ignore LD_LIBRARY_PATH environment variable.") }, - - { "version-script", ARGP_version_script, "FILE", 0, - N_("Read version information from FILE.") }, - - { "emulation", 'm', "NAME", 0, N_("Set emulation to NAME.") }, - - { "shared", 'G', NULL, 0, N_("Generate dynamic shared object.") }, - { NULL, 'r', NULL, 0L, N_("Generate relocatable object.") }, - - { NULL, 'B', "KEYWORD", OPTION_HIDDEN, "" }, + N_("Set link time DSO search path."), 0 }, + { "shared", 'G', NULL, 0, N_("Generate dynamic shared object."), 0 }, + { NULL, 'r', NULL, 0L, N_("Generate relocatable object."), 0 }, + { NULL, 'B', "KEYWORD", OPTION_HIDDEN, "", 0 }, { "-B local", 'B', NULL, OPTION_DOC, - N_("Causes symbol not assigned to a version be reduced to local.") }, - - { "gc-sections", ARGP_gc_sections, NULL, 0, N_("Remove unused sections.") }, + N_("Causes symbol not assigned to a version be reduced to local."), 0 }, + { "gc-sections", ARGP_gc_sections, NULL, 0, N_("Remove unused sections."), + 0 }, { "no-gc-sections", ARGP_no_gc_sections, NULL, 0, - N_("Don't remove unused sections.") }, - - { "soname", 'h', "NAME", 0, N_("Set soname of shared object.") }, - { "dynamic-linker", 'I', "NAME", 0, N_("Set the dynamic linker name.") }, - - { NULL, 'Q', "YN", OPTION_HIDDEN, NULL }, + N_("Don't remove unused sections."), 0 }, + { "soname", 'h', "NAME", 0, N_("Set soname of shared object."), 0 }, + { "dynamic-linker", 'I', "NAME", 0, N_("Set the dynamic linker name."), 0 }, + { NULL, 'Q', "YN", OPTION_HIDDEN, NULL, 0 }, { "-Q y | n", 'Q', NULL, OPTION_DOC, - N_("Add/suppress addition indentifying link-editor to .comment section") }, - + N_("Add/suppress addition indentifying link-editor to .comment section."), + 0 }, + { "eh-frame-hdr", ARGP_eh_frame_hdr, NULL, 0, + N_("Create .eh_frame_hdr section"), 0 }, + { "hash-style", ARGP_hash_style, "STYLE", 0, + N_("Set hash style to sysv, gnu or both."), 0 }, + { "build-id", ARGP_build_id, "STYLE", OPTION_ARG_OPTIONAL, + N_("Generate build ID note (md5, sha1 (default), uuid)."), 0 }, + + { NULL, 0, NULL, 0, N_("Linker Operation Control:"), 0 }, + { "verbose", 'v', NULL, 0, N_("Verbose messages."), 0 }, + { "trace", 't', NULL, 0, N_("Trace file opens."), 0 }, + { "conserve-memory", ARGP_conserve, NULL, 0, + N_("Trade speed for less memory usage"), 0 }, + { NULL, 'O', N_("LEVEL"), OPTION_ARG_OPTIONAL, + N_("Set optimization level to LEVEL."), 0 }, + { NULL, 'c', N_("FILE"), 0, N_("Use linker script in FILE."), 0 }, #if YYDEBUG { "yydebug", ARGP_yydebug, NULL, 0, - N_("Select to get parser debug information") }, + N_("Select to get parser debug information"), 0 }, #endif + { "version-script", ARGP_version_script, "FILE", 0, + N_("Read version information from FILE."), 0 }, + { "emulation", 'm', "NAME", 0, N_("Set emulation to NAME."), 0 }, - { NULL, 0, NULL, 0, NULL } + { NULL, 0, NULL, 0, NULL, 0 } }; /* Short description of program. */ @@ -187,20 +200,18 @@ static const char doc[] = N_("Combine object and archive files."); static const char args_doc[] = N_("[FILE]..."); /* Prototype for option handler. */ +static void replace_args (int argc, char *argv[]); static error_t parse_opt_1st (int key, char *arg, struct argp_state *state); static error_t parse_opt_2nd (int key, char *arg, struct argp_state *state); -/* Function to print some extra text in the help message. */ -static char *more_help (int key, const char *text, void *input); - /* Data structure to communicate with argp functions. */ static struct argp argp_1st = { - options, parse_opt_1st, args_doc, doc, NULL, more_help + options, parse_opt_1st, args_doc, doc, NULL, NULL, NULL }; static struct argp argp_2nd = { - options, parse_opt_2nd, args_doc, doc, NULL, more_help + options, parse_opt_2nd, args_doc, doc, NULL, NULL, NULL }; @@ -292,10 +303,10 @@ main (int argc, char *argv[]) setlocale (LC_ALL, ""); /* Make sure the message catalog can be found. */ - bindtextdomain (PACKAGE, LOCALEDIR); + bindtextdomain (PACKAGE_TARNAME, LOCALEDIR); /* Initialize the message catalog. */ - textdomain (PACKAGE); + textdomain (PACKAGE_TARNAME); /* Before we start tell the ELF library which version we are using. */ elf_version (EV_CURRENT); @@ -309,6 +320,9 @@ main (int argc, char *argv[]) #define obstack_chunk_free free obstack_init (&ld_state.smem); + /* Recognize old-style parameters for compatibility. */ + replace_args (argc, argv); + /* One quick pass over the parameters which allows us to scan for options with global effect which influence the rest of the processing. */ argp_parse (&argp_1st, argc, argv, ARGP_IN_ORDER, &remaining, NULL); @@ -324,6 +338,11 @@ main (int argc, char *argv[]) /* Determine which ELF backend to use. */ determine_output_format (); + /* If no hash style was specific default to the oldand slow SysV + method. */ + if (unlikely (ld_state.hash_style == hash_style_none)) + ld_state.hash_style = hash_style_sysv; + /* Prepare state. */ err = ld_prepare_state (emulation); if (err != 0) @@ -334,7 +353,7 @@ main (int argc, char *argv[]) statements in the script. This simply must not happen. */ ldin = fopen (linker_script, "r"); if (ldin == NULL) - error (EXIT_FAILURE, errno, gettext ("cannot open linker script \"%s\""), + error (EXIT_FAILURE, errno, gettext ("cannot open linker script '%s'"), linker_script); /* No need for locking. */ __fsetlocking (ldin, FSETLOCKING_BYCALLER); @@ -478,30 +497,60 @@ main (int argc, char *argv[]) } -static char * -more_help (int key, const char *text, void *input) +static void +replace_args (int argc, char *argv[]) { - char *buf; + static const struct + { + const char *from; + const char *to; + } args[] = + { + { "-export-dynamic", "--export-dynamic" }, + { "-dynamic-linker", "--dynamic-linker" }, + { "-static", "--static" }, + }; + const size_t nargs = sizeof (args) / sizeof (args[0]); + + for (int i = 1; i < argc; ++i) + if (argv[i][0] == '-' && islower (argv[i][1]) && argv[i][2] != '\0') + for (size_t j = 0; j < nargs; ++j) + if (strcmp (argv[i], args[j].from) == 0) + { + argv[i] = (char *) args[j].to; + break; + } +} - switch (key) - { - case ARGP_KEY_HELP_EXTRA: - /* We print some extra information. */ - if (asprintf (&buf, gettext ("Please report bugs to %s.\n"), - PACKAGE_BUGREPORT) < 0) - buf = NULL; - return buf; - default: - break; +static int +valid_hexarg (const char *arg) +{ + if (strncasecmp (arg, "0x", 2) != 0) + return 0; + + arg += 2; + do + { + if (isxdigit (arg[0]) && isxdigit (arg[1])) + { + arg += 2; + if (arg[0] == '-' || arg[0] == ':') + ++arg; + } + else + return 0; } - return (char *) text; + while (*arg != '\0'); + + return 1; } /* Quick scan of the parameter list for options with global effect. */ static error_t -parse_opt_1st (int key, char *arg, struct argp_state *state) +parse_opt_1st (int key, char *arg, + struct argp_state *state __attribute__ ((unused))) { switch (key) { @@ -594,7 +643,7 @@ parse_opt_1st (int key, char *arg, struct argp_state *state) else { error (0, 0, - gettext ("invalid page size value \"%s\": ignored"), + gettext ("invalid page size value '%s': ignored"), arg); ld_state.pagesize = 0; } @@ -602,7 +651,7 @@ parse_opt_1st (int key, char *arg, struct argp_state *state) } break; - case ARGP_rpath: + case 'R': add_rxxpath (&ld_state.rpath, arg); break; @@ -623,6 +672,33 @@ parse_opt_1st (int key, char *arg, struct argp_state *state) ld_state.gc_sections = key == ARGP_gc_sections; break; + case ARGP_eh_frame_hdr: + ld_state.eh_frame_hdr = true; + break; + + case ARGP_hash_style: + if (strcmp (arg, "gnu") == 0) + ld_state.hash_style = hash_style_gnu; + else if (strcmp (arg, "both") == 0) + ld_state.hash_style = hash_style_gnu | hash_style_sysv; + else if (strcmp (arg, "sysv") == 0) + ld_state.hash_style = hash_style_sysv; + else + error (EXIT_FAILURE, 0, gettext ("invalid hash style '%s'"), arg); + break; + + case ARGP_build_id: + if (arg == NULL) + ld_state.build_id = "sha1"; + else if (strcmp (arg, "uuid") != 0 + && strcmp (arg, "md5") != 0 + && strcmp (arg, "sha1") != 0 + && !valid_hexarg (arg)) + error (EXIT_FAILURE, 0, gettext ("invalid build-ID style '%s'"), arg); + else + ld_state.build_id = arg; + break; + case 's': if (arg == NULL) { @@ -639,6 +715,8 @@ parse_opt_1st (int key, char *arg, struct argp_state *state) case 'O': case ARGP_whole_archive: case ARGP_no_whole_archive: + case ARGP_as_needed: + case ARGP_no_as_needed: case 'L': case '(': case ')': @@ -685,7 +763,8 @@ parse_opt_1st (int key, char *arg, struct argp_state *state) /* Handle program arguments for real. */ static error_t -parse_opt_2nd (int key, char *arg, struct argp_state *state) +parse_opt_2nd (int key, char *arg, + struct argp_state *state __attribute__ ((unused))) { static bool group_start_requested; static bool group_end_requested; @@ -734,6 +813,13 @@ parse_opt_2nd (int key, char *arg, struct argp_state *state) ld_state.extract_rule = defaultextract; break; + case ARGP_as_needed: + ld_state.as_needed = true; + break; + case ARGP_no_as_needed: + ld_state.as_needed = false; + break; + case ARGP_static: case ARGP_dynamic: /* Enable/disable use for DSOs. */ @@ -865,14 +951,14 @@ load_needed (void) /* Print the version information. */ static void -print_version (FILE *stream, struct argp_state *state) +print_version (FILE *stream, struct argp_state *state __attribute__ ((unused))) { - fprintf (stream, "ld (%s) %s\n", PACKAGE_NAME, VERSION); + fprintf (stream, "ld (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION); fprintf (stream, gettext ("\ Copyright (C) %s Red Hat, Inc.\n\ This is free software; see the source for copying conditions. There is NO\n\ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ -"), "2004"); +"), "2008"); fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper"); } @@ -911,17 +997,19 @@ parse_z_option (const char *arg) /* This is only meaningful if we create a DSO. */ && ld_state.file_type == dso_file_type) ld_state.dt_flags_1 |= DF_1_NOOPEN; - else if (strcmp (arg, "ignore") == 0) - ld_state.ignore_unused_dsos = true; - else if (strcmp (arg, "record") == 0) - ld_state.ignore_unused_dsos = false; else if (strcmp (arg, "systemlibrary") == 0) ld_state.is_system_library = true; + else if (strcmp (arg, "execstack") == 0) + ld_state.execstack = execstack_true; + else if (strcmp (arg, "noexecstack") == 0) + ld_state.execstack = execstack_false_force; else if (strcmp (arg, "allextract") != 0 && strcmp (arg, "defaultextract") != 0 && strcmp (arg, "weakextract") != 0 && strcmp (arg, "lazyload") != 0 - && strcmp (arg, "nolazyload") != 0) + && strcmp (arg, "nolazyload") != 0 + && strcmp (arg, "ignore") != 0 + && strcmp (arg, "record") != 0) error (0, 0, gettext ("unknown option `-%c %s'"), 'z', arg); } @@ -939,6 +1027,10 @@ parse_z_option_2 (const char *arg) ld_state.lazyload = true; else if (strcmp (arg, "nolazyload") == 0) ld_state.lazyload = false; + else if (strcmp (arg, "ignore") == 0) + ld_state.as_needed = true; + else if (strcmp (arg, "record") == 0) + ld_state.as_needed = false; } @@ -1109,6 +1201,7 @@ ld_new_inputfile (const char *fname, enum file_type type) newfile->soname = newfile->fname = newfile->rfname = fname; newfile->file_type = type; newfile->extract_rule = ld_state.extract_rule; + newfile->as_needed = ld_state.as_needed; newfile->lazyload = ld_state.lazyload; newfile->status = not_opened; @@ -1349,7 +1442,7 @@ read_version_script (const char *fname) or absolute) path. No search along a path will be performed. */ ldin = fopen (fname, "r"); if (ldin == NULL) - error (EXIT_FAILURE, errno, gettext ("cannot read version script \"%s\""), + error (EXIT_FAILURE, errno, gettext ("cannot read version script '%s'"), fname); /* No need for locking. */ __fsetlocking (ldin, FSETLOCKING_BYCALLER); @@ -1514,7 +1607,12 @@ create_special_section_symbol (struct symbol **symp, const char *name) abort (); (*symp)->defined = 1; + (*symp)->local = 1; + (*symp)->hidden = 1; (*symp)->type = STT_OBJECT; ++ld_state.nsymtab; } + + +#include "debugpred.h" |