X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Fldmain.c;h=21133ab72090a6e2f8fcb80a2c11f40f8fc12fb0;hb=aec6b87e0b66d707ead62ca40d220ee78b4cf5a5;hp=a784670ad89d4058b6a480b15a730ea87f73a199;hpb=0e86e20e046ab38f95fb405f91a7b3a1ec7d7aba;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/ldmain.c b/ld/ldmain.c index a784670ad8..21133ab720 100644 --- a/ld/ldmain.c +++ b/ld/ldmain.c @@ -1,7 +1,5 @@ /* Main program of GNU linker. - Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, - 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 - Free Software Foundation, Inc. + Copyright (C) 1991-2016 Free Software Foundation, Inc. Written by Steve Chamberlain steve@cygnus.com This file is part of the GNU Binutils. @@ -43,7 +41,6 @@ #ifdef ENABLE_PLUGINS #include "plugin.h" #include "plugin-api.h" -#include "libbfd.h" #endif /* ENABLE_PLUGINS */ /* Somewhere above, sys/stat.h got included. */ @@ -82,7 +79,7 @@ const char *ld_sysroot; char * ld_canon_sysroot; int ld_canon_sysroot_len; -/* Set by -G argument, for MIPS ECOFF target. */ +/* Set by -G argument, for targets like MIPS ELF. */ int g_switch_value = 8; /* Nonzero means print names of input files as processed. */ @@ -139,7 +136,7 @@ static bfd_boolean unattached_reloc (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); static bfd_boolean notice (struct bfd_link_info *, struct bfd_link_hash_entry *, - bfd *, asection *, bfd_vma, flagword, const char *); + struct bfd_link_hash_entry *, bfd *, asection *, bfd_vma, flagword); static struct bfd_link_callbacks link_callbacks = { @@ -191,6 +188,9 @@ main (int argc, char **argv) { char *emulation; long start_time = get_run_time (); +#ifdef HAVE_SBRK + char *start_sbrk = (char *) sbrk (0); +#endif #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); @@ -222,15 +222,7 @@ main (int argc, char **argv) /* Set up the sysroot directory. */ ld_sysroot = get_sysroot (argc, argv); if (*ld_sysroot) - { - if (*TARGET_SYSTEM_ROOT == 0) - { - einfo ("%P%F: this linker was not configured to use sysroots\n"); - ld_sysroot = ""; - } - else - ld_canon_sysroot = lrealpath (ld_sysroot); - } + ld_canon_sysroot = lrealpath (ld_sysroot); if (ld_canon_sysroot) ld_canon_sysroot_len = strlen (ld_canon_sysroot); else @@ -260,11 +252,11 @@ main (int argc, char **argv) config.make_executable = TRUE; config.magic_demand_paged = TRUE; config.text_read_only = TRUE; + link_info.disable_target_specific_optimizations = -1; command_line.warn_mismatch = TRUE; command_line.warn_search_mismatch = TRUE; command_line.check_section_addresses = -1; - command_line.disable_target_specific_optimizations = -1; /* We initialize DEMANGLING based on the environment variable COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the @@ -285,9 +277,14 @@ main (int argc, char **argv) link_info.init_function = "_init"; link_info.fini_function = "_fini"; link_info.relax_pass = 1; + link_info.extern_protected_data = -1; + link_info.dynamic_undefined_weak = -1; link_info.pei386_auto_import = -1; link_info.spare_dynamic_tags = 5; link_info.path_separator = ':'; +#ifdef DEFAULT_FLAG_COMPRESS_DEBUG + link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB; +#endif ldfile_add_arch (""); emulation = get_emulation (argc, argv); @@ -296,6 +293,7 @@ main (int argc, char **argv) config.maxpagesize = bfd_emul_get_maxpagesize (default_target); config.commonpagesize = bfd_emul_get_commonpagesize (default_target); lang_init (); + ldexp_init (); ldemul_before_parse (); lang_has_input_file = FALSE; parse_args (argc, argv); @@ -305,8 +303,7 @@ main (int argc, char **argv) #ifdef ENABLE_PLUGINS /* Now all the plugin arguments have been gathered, we can load them. */ - if (plugin_load_plugins ()) - einfo (_("%P%F: %s: error loading plugin\n"), plugin_error_plugin ()); + plugin_load_plugins (); #endif /* ENABLE_PLUGINS */ ldemul_set_symbols (); @@ -378,6 +375,13 @@ main (int argc, char **argv) lang_final (); + /* If the only command line argument has been -v or --version or --verbose + then ignore any input files provided by linker scripts and exit now. + We do not want to create an output file when the linker is just invoked + to provide version information. */ + if (argc == 2 && version_printed) + xexit (0); + if (!lang_has_input_file) { if (version_printed || command_line.print_output_format) @@ -412,11 +416,18 @@ main (int argc, char **argv) /* Print error messages for any missing symbols, for any warning symbols, and possibly multiple definitions. */ - if (link_info.relocatable) + if (bfd_link_relocatable (&link_info)) link_info.output_bfd->flags &= ~EXEC_P; else link_info.output_bfd->flags |= EXEC_P; + if ((link_info.compress_debug & COMPRESS_DEBUG)) + { + link_info.output_bfd->flags |= BFD_COMPRESS; + if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB) + link_info.output_bfd->flags |= BFD_COMPRESS_GABI; + } + ldwrite (); if (config.map_file != NULL) @@ -425,7 +436,17 @@ main (int argc, char **argv) output_cref (config.map_file != NULL ? config.map_file : stdout); if (nocrossref_list != NULL) check_nocrossrefs (); + if (command_line.print_memory_usage) + lang_print_memory_usage (); +#if 0 + { + struct bfd_link_hash_entry * h; + h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); + fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); + } +#endif + ldexp_finish (); lang_finish (); /* Even if we're producing relocatable output, some non-fatal errors should @@ -448,7 +469,8 @@ main (int argc, char **argv) /* If the --force-exe-suffix is enabled, and we're making an executable file and it doesn't end in .exe, copy it to one which does. */ - if (! link_info.relocatable && command_line.force_exe_suffix) + if (!bfd_link_relocatable (&link_info) + && command_line.force_exe_suffix) { int len = strlen (output_filename); @@ -469,10 +491,10 @@ main (int argc, char **argv) dst = fopen (dst_name, FOPEN_WB); if (!src) - einfo (_("%X%P: unable to open for source of copy `%s'\n"), + einfo (_("%P%F: unable to open for source of copy `%s'\n"), output_filename); if (!dst) - einfo (_("%X%P: unable to open for destination of copy `%s'\n"), + einfo (_("%P%F: unable to open for destination of copy `%s'\n"), dst_name); while ((l = fread (buf, 1, bsize, src)) > 0) { @@ -505,7 +527,7 @@ main (int argc, char **argv) program_name, run_time / 1000000, run_time % 1000000); #ifdef HAVE_SBRK fprintf (stderr, _("%s: data size %ld\n"), program_name, - (long) (lim - (char *) &environ)); + (long) (lim - start_sbrk)); #endif fflush (stderr); } @@ -597,8 +619,10 @@ get_emulation (int argc, char **argv) || strcmp (argv[i], "-mips5") == 0 || strcmp (argv[i], "-mips32") == 0 || strcmp (argv[i], "-mips32r2") == 0 + || strcmp (argv[i], "-mips32r6") == 0 || strcmp (argv[i], "-mips64") == 0 - || strcmp (argv[i], "-mips64r2") == 0) + || strcmp (argv[i], "-mips64r2") == 0 + || strcmp (argv[i], "-mips64r6") == 0) { /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are passed to the linker by some MIPS compilers. They @@ -744,6 +768,7 @@ add_keepsyms_file (const char *filename) free (buf); link_info.strip = strip_some; + fclose (file); } /* Callbacks from the BFD linker routines. */ @@ -771,30 +796,14 @@ add_archive_element (struct bfd_link_info *info, BFD, but we still want to output the original BFD filename. */ orig_input = *input; #ifdef ENABLE_PLUGINS - if (plugin_active_plugins_p () && !no_more_claiming) + if (link_info.lto_plugin_active && !no_more_claiming) { /* We must offer this archive member to the plugins to claim. */ - const char *filename = (bfd_my_archive (abfd) != NULL - ? bfd_my_archive (abfd)->filename : abfd->filename); - int fd = open (filename, O_RDONLY | O_BINARY); - if (fd >= 0) + plugin_maybe_claim (input); + if (input->flags.claimed) { - struct ld_plugin_input_file file; - - /* Offset and filesize must refer to the individual archive - member, not the whole file, and must exclude the header. - Fortunately for us, that is how the data is stored in the - origin field of the bfd and in the arelt_data. */ - file.name = filename; - file.offset = abfd->origin; - file.filesize = arelt_size (abfd); - file.fd = fd; - plugin_maybe_claim (&file, input); - if (input->flags.claimed) - { - input->flags.claim_archive = TRUE; - *subsbfd = input->the_bfd; - } + input->flags.claim_archive = TRUE; + *subsbfd = input->the_bfd; } } #endif /* ENABLE_PLUGINS */ @@ -840,7 +849,8 @@ add_archive_element (struct bfd_link_info *info, { char buf[100]; - sprintf (buf, _("Archive member included because of file (symbol)\n\n")); + sprintf (buf, _("Archive member included " + "to satisfy reference by file (symbol)\n\n")); minfo ("%s", buf); header_printed = TRUE; } @@ -951,10 +961,10 @@ multiple_definition (struct bfd_link_info *info, if (obfd != NULL) einfo (_("%D: first defined here\n"), obfd, osec, oval); - if (RELAXATION_ENABLED) + if (RELAXATION_ENABLED_BY_USER) { einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); - command_line.disable_target_specific_optimizations = -1; + DISABLE_RELAXATION; } return TRUE; @@ -1109,7 +1119,7 @@ constructor_callback (struct bfd_link_info *info, /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a useful error message. */ if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL - && (info->relocatable + && (bfd_link_relocatable (info) || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); @@ -1148,6 +1158,25 @@ struct warning_callback_info asymbol **asymbols; }; +/* Look through the relocs to see if we can find a plausible address + for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ + +static bfd_boolean +symbol_warning (const char *warning, const char *symbol, bfd *abfd) +{ + struct warning_callback_info cinfo; + + if (!bfd_generic_link_read_symbols (abfd)) + einfo (_("%B%F: could not read symbols: %E\n"), abfd); + + cinfo.found = FALSE; + cinfo.warning = warning; + cinfo.symbol = symbol; + cinfo.asymbols = bfd_get_outsymbols (abfd); + bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); + return cinfo.found; +} + /* This is called when there is a reference to a warning symbol. */ static bfd_boolean @@ -1170,24 +1199,14 @@ warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, einfo ("%P: %s%s\n", _("warning: "), warning); else if (symbol == NULL) einfo ("%B: %s%s\n", abfd, _("warning: "), warning); - else + else if (! symbol_warning (warning, symbol, abfd)) { - struct warning_callback_info cinfo; - - /* Look through the relocs to see if we can find a plausible - address. */ - - if (!bfd_generic_link_read_symbols (abfd)) - einfo (_("%B%F: could not read symbols: %E\n"), abfd); - - cinfo.found = FALSE; - cinfo.warning = warning; - cinfo.symbol = symbol; - cinfo.asymbols = bfd_get_outsymbols (abfd); - bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); - - if (! cinfo.found) - einfo ("%B: %s%s\n", abfd, _("warning: "), warning); + bfd *b; + /* Search all input files for a reference to SYMBOL. */ + for (b = info->input_bfds; b; b = b->link.next) + if (b != abfd && symbol_warning (warning, symbol, b)) + return TRUE; + einfo ("%B: %s%s\n", abfd, _("warning: "), warning); } return TRUE; @@ -1436,11 +1455,11 @@ unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, static bfd_boolean notice (struct bfd_link_info *info, struct bfd_link_hash_entry *h, + struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED, bfd *abfd, asection *section, bfd_vma value, - flagword flags ATTRIBUTE_UNUSED, - const char *string ATTRIBUTE_UNUSED) + flagword flags ATTRIBUTE_UNUSED) { const char *name;