X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Flexsup.c;h=87341f93dcc41a5529f4258cf8d2ea0eff327c58;hb=39a67dc4f7d032c78f031e2d101b9552f1a6b57f;hp=52b4fdb565c2e5818e1cefe7940db97906f9a9a8;hpb=b00548197542a46df0e46d848ac61a00827943ea;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/lexsup.c b/ld/lexsup.c index 52b4fdb565..87341f93dc 100644 --- a/ld/lexsup.c +++ b/ld/lexsup.c @@ -1,5 +1,5 @@ /* Parse options for the GNU linker. - Copyright (C) 1991-2014 Free Software Foundation, Inc. + Copyright (C) 1991-2016 Free Software Foundation, Inc. This file is part of the GNU Binutils. @@ -65,9 +65,9 @@ static void help (void); enum control_enum { /* Use one dash before long option name. */ - ONE_DASH, + ONE_DASH = 1, /* Use two dashes before long option name. */ - TWO_DASHES, + TWO_DASHES = 2, /* Only accept two dashes before the long option name. This is an overloading of the use of this enum, since originally it was only intended to tell the --help display function how to display @@ -138,6 +138,9 @@ static const struct ld_option ld_options[] = { {"dynamic-linker", required_argument, NULL, OPTION_DYNAMIC_LINKER}, 'I', N_("PROGRAM"), N_("Set PROGRAM as the dynamic linker to use"), TWO_DASHES }, + { {"no-dynamic-linker", no_argument, NULL, OPTION_NO_DYNAMIC_LINKER}, + '\0', NULL, N_("Produce an executable with no program interpreter header"), + TWO_DASHES }, { {"library", required_argument, NULL, 'l'}, 'l', N_("LIBNAME"), N_("Search for library LIBNAME"), TWO_DASHES }, { {"library-path", required_argument, NULL, 'L'}, @@ -176,6 +179,12 @@ static const struct ld_option ld_options[] = { {"fuse-ld=", required_argument, NULL, OPTION_IGNORE}, '\0', NULL, N_("Ignored for GCC linker option compatibility"), ONE_DASH }, + { {"map-whole-files", optional_argument, NULL, OPTION_IGNORE}, + '\0', NULL, N_("Ignored for gold option compatibility"), + TWO_DASHES }, + { {"no-map-whole-files", optional_argument, NULL, OPTION_IGNORE}, + '\0', NULL, N_("Ignored for gold option compatibility"), + TWO_DASHES }, { {"Qy", no_argument, NULL, OPTION_IGNORE}, '\0', NULL, N_("Ignored for SVR4 compatibility"), ONE_DASH }, { {"emit-relocs", no_argument, NULL, 'q'}, @@ -206,6 +215,9 @@ static const struct ld_option ld_options[] = { {"undefined", required_argument, NULL, 'u'}, 'u', N_("SYMBOL"), N_("Start with undefined reference to SYMBOL"), TWO_DASHES }, + { {"require-defined", required_argument, NULL, OPTION_REQUIRE_DEFINED_SYMBOL}, + '\0', N_("SYMBOL"), N_("Require SYMBOL be defined in the final output"), + TWO_DASHES }, { {"unique", optional_argument, NULL, OPTION_UNIQUE}, '\0', N_("[=SECTION]"), N_("Don't merge input [SECTION | orphan] sections"), TWO_DASHES }, @@ -379,6 +391,8 @@ static const struct ld_option ld_options[] = EXACTLY_TWO_DASHES }, { {"print-output-format", no_argument, NULL, OPTION_PRINT_OUTPUT_FORMAT}, '\0', NULL, N_("Print default output format"), TWO_DASHES }, + { {"print-sysroot", no_argument, NULL, OPTION_PRINT_SYSROOT}, + '\0', NULL, N_("Print current sysroot"), TWO_DASHES }, { {"qmagic", no_argument, NULL, OPTION_IGNORE}, '\0', NULL, N_("Ignored for Linux compatibility"), ONE_DASH }, { {"reduce-memory-overheads", no_argument, NULL, @@ -505,6 +519,17 @@ static const struct ld_option ld_options[] = OPTION_IGNORE_UNRESOLVED_SYMBOL}, '\0', N_("SYMBOL"), N_("Unresolved SYMBOL will not cause an error or warning"), TWO_DASHES }, + { {"push-state", no_argument, NULL, OPTION_PUSH_STATE}, + '\0', NULL, N_("Push state of flags governing input file handling"), + TWO_DASHES }, + { {"pop-state", no_argument, NULL, OPTION_POP_STATE}, + '\0', NULL, N_("Pop state of flags governing input file handling"), + TWO_DASHES }, + { {"print-memory-usage", no_argument, NULL, OPTION_PRINT_MEMORY_USAGE}, + '\0', NULL, N_("Report target memory usage"), TWO_DASHES }, + { {"orphan-handling", required_argument, NULL, OPTION_ORPHAN_HANDLING}, + '\0', N_("=MODE"), N_("Control how orphan sections are handled."), + TWO_DASHES }, }; #define OPTION_COUNT ARRAY_SIZE (ld_options) @@ -654,7 +679,28 @@ parse_args (unsigned argc, char **argv) switch (optc) { case '?': - einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]); + { + /* If the last word on the command line is an option that + requires an argument, getopt will refuse to recognise it. + Try to catch such options here and issue a more helpful + error message than just "unrecognized option". */ + int opt; + + for (opt = ARRAY_SIZE (ld_options); opt--;) + if (ld_options[opt].opt.has_arg == required_argument + /* FIXME: There are a few short options that do not + have long equivalents, but which require arguments. + We should handle them too. */ + && ld_options[opt].opt.name != NULL + && strcmp (argv[last_optind] + ld_options[opt].control, ld_options[opt].opt.name) == 0) + { + einfo (_("%P: %s: missing argument\n"), argv[last_optind]); + break; + } + + if (opt == -1) + einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]); + } /* Fall through. */ default: @@ -739,6 +785,10 @@ parse_args (unsigned argc, char **argv) case 'I': /* Used on Solaris. */ case OPTION_DYNAMIC_LINKER: command_line.interpreter = optarg; + link_info.nointerp = 0; + break; + case OPTION_NO_DYNAMIC_LINKER: + link_info.nointerp = 1; break; case OPTION_SYSROOT: /* Already handled in ldmain.c. */ @@ -954,6 +1004,11 @@ parse_args (unsigned argc, char **argv) case OPTION_OFORMAT: lang_add_output_format (optarg, NULL, NULL, 0); break; + case OPTION_PRINT_SYSROOT: + if (*ld_sysroot) + puts (ld_sysroot); + xexit (0); + break; case OPTION_PRINT_OUTPUT_FORMAT: command_line.print_output_format = TRUE; break; @@ -963,7 +1018,7 @@ parse_args (unsigned argc, char **argv) break; case OPTION_PLUGIN_OPT: if (plugin_opt_plugin_arg (optarg)) - einfo(_("%P%F: bad -plugin-opt option\n")); + einfo (_("%P%F: bad -plugin-opt option\n")); break; #endif /* ENABLE_PLUGINS */ case 'q': @@ -980,9 +1035,13 @@ parse_args (unsigned argc, char **argv) an error message here. We cannot just make this a warning, increment optind, and continue because getopt is too confused and will seg-fault the next time around. */ - einfo(_("%P%F: bad -rpath option\n")); + einfo(_("%P%F: unrecognised option: %s\n"), argv[optind]); + + if (bfd_link_pic (&link_info)) + einfo (_("%P%F: -r and %s may not be used together\n"), + bfd_link_dll (&link_info) ? "-shared" : "-pie"); - link_info.relocatable = TRUE; + link_info.type = type_relocatable; config.build_constructors = FALSE; config.magic_demand_paged = FALSE; config.text_read_only = FALSE; @@ -1085,7 +1144,10 @@ parse_args (unsigned argc, char **argv) case OPTION_SHARED: if (config.has_shared) { - link_info.shared = TRUE; + if (bfd_link_relocatable (&link_info)) + einfo (_("%P%F: -r and -shared may not be used together\n")); + + link_info.type = type_dll; /* When creating a shared library, the default behaviour is to ignore any unresolved references. */ if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET) @@ -1099,8 +1161,10 @@ parse_args (unsigned argc, char **argv) case OPTION_PIE: if (config.has_shared) { - link_info.shared = TRUE; - link_info.pie = TRUE; + if (bfd_link_relocatable (&link_info)) + einfo (_("%P%F: -r and -pie may not be used together\n")); + + link_info.type = type_pie; } else einfo (_("%P%F: -pie not supported\n")); @@ -1213,7 +1277,11 @@ parse_args (unsigned argc, char **argv) link_info.task_link = TRUE; /* Fall through - do an implied -r option. */ case OPTION_UR: - link_info.relocatable = TRUE; + if (bfd_link_pic (&link_info)) + einfo (_("%P%F: -r and %s may not be used together\n"), + bfd_link_dll (&link_info) ? "-shared" : "-pie"); + + link_info.type = type_relocatable; config.build_constructors = TRUE; config.magic_demand_paged = FALSE; config.text_read_only = FALSE; @@ -1222,6 +1290,9 @@ parse_args (unsigned argc, char **argv) case 'u': ldlang_add_undef (optarg, TRUE); break; + case OPTION_REQUIRE_DEFINED_SYMBOL: + ldlang_add_require_defined (optarg); + break; case OPTION_UNIQUE: if (optarg != NULL) lang_add_unique (optarg); @@ -1444,6 +1515,41 @@ parse_args (unsigned argc, char **argv) einfo (_("%P%X: --hash-size needs a numeric argument\n")); } break; + + case OPTION_PUSH_STATE: + input_flags.pushed = xmemdup (&input_flags, + sizeof (input_flags), + sizeof (input_flags)); + break; + + case OPTION_POP_STATE: + if (input_flags.pushed == NULL) + einfo (_("%P%F: no state pushed before popping\n")); + else + { + struct lang_input_statement_flags *oldp = input_flags.pushed; + memcpy (&input_flags, oldp, sizeof (input_flags)); + free (oldp); + } + break; + + case OPTION_PRINT_MEMORY_USAGE: + command_line.print_memory_usage = TRUE; + break; + + case OPTION_ORPHAN_HANDLING: + if (strcasecmp (optarg, "place") == 0) + config.orphan_handling = orphan_handling_place; + else if (strcasecmp (optarg, "warn") == 0) + config.orphan_handling = orphan_handling_warn; + else if (strcasecmp (optarg, "error") == 0) + config.orphan_handling = orphan_handling_error; + else if (strcasecmp (optarg, "discard") == 0) + config.orphan_handling = orphan_handling_discard; + else + einfo (_("%P%F: invalid argument to option" + " \"--orphan-handling\"\n")); + break; } } @@ -1473,13 +1579,9 @@ parse_args (unsigned argc, char **argv) /* FIXME: Should we allow emulations a chance to set this ? */ link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols; - if (link_info.relocatable) - { - if (command_line.check_section_addresses < 0) - command_line.check_section_addresses = 0; - if (link_info.shared) - einfo (_("%P%F: -r and -shared may not be used together\n")); - } + if (bfd_link_relocatable (&link_info) + && command_line.check_section_addresses < 0) + command_line.check_section_addresses = 0; /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and @@ -1492,7 +1594,7 @@ parse_args (unsigned argc, char **argv) break; case symbolic: /* -Bsymbolic is for shared library only. */ - if (link_info.shared) + if (bfd_link_dll (&link_info)) { link_info.symbolic = TRUE; /* Should we free the unused memory? */ @@ -1502,7 +1604,7 @@ parse_args (unsigned argc, char **argv) break; case symbolic_functions: /* -Bsymbolic-functions is for shared library only. */ - if (link_info.shared) + if (bfd_link_dll (&link_info)) command_line.dynamic_list = dynamic_list_data; break; } @@ -1518,7 +1620,7 @@ parse_args (unsigned argc, char **argv) break; } - if (! link_info.shared) + if (!bfd_link_dll (&link_info)) { if (command_line.filter_shlib) einfo (_("%P%F: -F may not be used without -shared\n")); @@ -1526,13 +1628,10 @@ parse_args (unsigned argc, char **argv) einfo (_("%P%F: -f may not be used without -shared\n")); } - if (! link_info.shared || link_info.pie) - link_info.executable = TRUE; - /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I don't see how else this can be handled, since in this case we must preserve all externally visible symbols. */ - if (link_info.relocatable && link_info.strip == strip_all) + if (bfd_link_relocatable (&link_info) && link_info.strip == strip_all) { link_info.strip = strip_debugger; if (link_info.discard == discard_sec_merge) @@ -1606,6 +1705,122 @@ set_segment_start (const char *section, char *valstr) lang_section_start (section, exp_intop (val), seg); } +static void +elf_shlib_list_options (FILE *file) +{ + fprintf (file, _("\ + --audit=AUDITLIB Specify a library to use for auditing\n")); + fprintf (file, _("\ + -Bgroup Selects group name lookup rules for DSO\n")); + fprintf (file, _("\ + --disable-new-dtags Disable new dynamic tags\n")); + fprintf (file, _("\ + --enable-new-dtags Enable new dynamic tags\n")); + fprintf (file, _("\ + --eh-frame-hdr Create .eh_frame_hdr section\n")); + fprintf (file, _("\ + --exclude-libs=LIBS Make all symbols in LIBS hidden\n")); + fprintf (file, _("\ + --hash-style=STYLE Set hash style to sysv, gnu or both\n")); + fprintf (file, _("\ + -P AUDITLIB, --depaudit=AUDITLIB\n" "\ + Specify a library to use for auditing dependencies\n")); + fprintf (file, _("\ + -z combreloc Merge dynamic relocs into one section and sort\n")); + fprintf (file, _("\ + -z nocombreloc Don't merge dynamic relocs into one section\n")); + fprintf (file, _("\ + -z global Make symbols in DSO available for subsequently\n\ + loaded objects\n")); + fprintf (file, _("\ + -z initfirst Mark DSO to be initialized first at runtime\n")); + fprintf (file, _("\ + -z interpose Mark object to interpose all DSOs but executable\n")); + fprintf (file, _("\ + -z lazy Mark object lazy runtime binding (default)\n")); + fprintf (file, _("\ + -z loadfltr Mark object requiring immediate process\n")); + fprintf (file, _("\ + -z nocopyreloc Don't create copy relocs\n")); + fprintf (file, _("\ + -z nodefaultlib Mark object not to use default search paths\n")); + fprintf (file, _("\ + -z nodelete Mark DSO non-deletable at runtime\n")); + fprintf (file, _("\ + -z nodlopen Mark DSO not available to dlopen\n")); + fprintf (file, _("\ + -z nodump Mark DSO not available to dldump\n")); + fprintf (file, _("\ + -z now Mark object non-lazy runtime binding\n")); + fprintf (file, _("\ + -z origin Mark object requiring immediate $ORIGIN\n\ + processing at runtime\n")); + fprintf (file, _("\ + -z relro Create RELRO program header\n")); + fprintf (file, _("\ + -z norelro Don't create RELRO program header\n")); + fprintf (file, _("\ + -z stacksize=SIZE Set size of stack segment\n")); + fprintf (file, _("\ + -z text Treat DT_TEXTREL in shared object as error\n")); + fprintf (file, _("\ + -z notext Don't treat DT_TEXTREL in shared object as error\n")); + fprintf (file, _("\ + -z textoff Don't treat DT_TEXTREL in shared object as error\n")); +} + +static void +elf_static_list_options (FILE *file) +{ + fprintf (file, _("\ + --build-id[=STYLE] Generate build ID note\n")); + fprintf (file, _("\ + --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi]\n\ + Compress DWARF debug sections using zlib\n")); +#ifdef DEFAULT_FLAG_COMPRESS_DEBUG + fprintf (file, _("\ + Default: zlib-gabi\n")); +#else + fprintf (file, _("\ + Default: none\n")); +#endif + fprintf (file, _("\ + -z common-page-size=SIZE Set common page size to SIZE\n")); + fprintf (file, _("\ + -z max-page-size=SIZE Set maximum page size to SIZE\n")); + fprintf (file, _("\ + -z defs Report unresolved symbols in object files.\n")); + fprintf (file, _("\ + -z muldefs Allow multiple definitions\n")); + fprintf (file, _("\ + -z execstack Mark executable as requiring executable stack\n")); + fprintf (file, _("\ + -z noexecstack Mark executable as not requiring executable stack\n")); +} + +static void +elf_plt_unwind_list_options (FILE *file) +{ + fprintf (file, _("\ + --ld-generated-unwind-info Generate exception handling info for PLT\n\ + --no-ld-generated-unwind-info\n\ + Don't generate exception handling info for PLT\n")); +} + +static void +ld_list_options (FILE *file, bfd_boolean elf, bfd_boolean shlib, + bfd_boolean plt_unwind) +{ + if (!elf) + return; + printf (_("ELF emulations:\n")); + if (plt_unwind) + elf_plt_unwind_list_options (file); + elf_static_list_options (file); + if (shlib) + elf_shlib_list_options (file); +} + /* Print help messages for the options. */ @@ -1718,6 +1933,8 @@ help (void) /* xgettext:c-format */ printf (_("%s: emulation specific options:\n"), program_name); + ld_list_options (stdout, ELF_LIST_OPTIONS, ELF_SHLIB_LIST_OPTIONS, + ELF_PLT_UNWIND_LIST_OPTIONS); ldemul_list_emulation_options (stdout); printf ("\n");