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| author | Roland McGrath <roland@gnu.org> | 2007-07-09 21:25:34 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2007-07-09 21:25:34 +0000 |
| commit | c0065db7328646edb30d44e0ed2d38e2d9cc3ea5 (patch) | |
| tree | 4c8d58ac634f6a3fcf33950d21b9424f529f5168 /ld/emultempl/elf32.em | |
| parent | ff59fc360e31b2d4b84e810753f128035e7c9e4a (diff) | |
| download | gdb-c0065db7328646edb30d44e0ed2d38e2d9cc3ea5.zip gdb-c0065db7328646edb30d44e0ed2d38e2d9cc3ea5.tar.gz gdb-c0065db7328646edb30d44e0ed2d38e2d9cc3ea5.tar.bz2 | |
2007-07-09 Roland McGrath <roland@redhat.com>
* emultempl/elf32.em (gld${EMULATION_NAME}_add_option): Add --build-id.
(gld${EMULATION_NAME}_handle_option): Handle --build-id.
(gld${EMULATION_NAME}_list_options): List --build-id.
(gld${EMULATION_NAME}_after_open): If --build-id was given,
synthesize a ".note.gnu.build-id" section and cache it in elf_tdata.
* ld.texinfo (Options): Describe --build-id.
* NEWS: Mention --build-id.
Diffstat (limited to 'ld/emultempl/elf32.em')
| -rw-r--r-- | ld/emultempl/elf32.em | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em index 3c7a82d..2a92f58 100644 --- a/ld/emultempl/elf32.em +++ b/ld/emultempl/elf32.em @@ -866,6 +866,45 @@ gld${EMULATION_NAME}_after_open (void) { struct bfd_link_needed_list *needed, *l; + if (link_info.emit_note_gnu_build_id) + { + bfd *abfd; + asection *s; + bfd_size_type size; + + abfd = link_info.input_bfds; + + size = _bfd_id_note_section_size (abfd, &link_info); + if (size == 0) + { + einfo ("%P: warning: unrecognized --build-id style ignored.\n"); + free (link_info.emit_note_gnu_build_id); + link_info.emit_note_gnu_build_id = NULL; + } + else + { + s = bfd_make_section_with_flags (abfd, ".note.gnu.build-id", + SEC_ALLOC | SEC_LOAD + | SEC_IN_MEMORY | SEC_LINKER_CREATED + | SEC_READONLY | SEC_DATA); + if (s != NULL && bfd_set_section_alignment (abfd, s, 2)) + { + struct elf_obj_tdata *t = elf_tdata (output_bfd); + t->emit_note_gnu_build_id = link_info.emit_note_gnu_build_id; + t->note_gnu_build_id_sec = s; + elf_section_type (s) = SHT_NOTE; + s->size = size; + } + else + { + einfo ("%P: warning: Cannot create .note.gnu.build-id section," + " --build-id ignored.\n"); + free (link_info.emit_note_gnu_build_id); + link_info.emit_note_gnu_build_id = NULL; + } + } + } + if (link_info.eh_frame_hdr && ! link_info.traditional_format && ! link_info.relocatable) @@ -1760,6 +1799,7 @@ cat >>e${EMULATION_NAME}.c <<EOF #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1) #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1) #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1) +#define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1) static void gld${EMULATION_NAME}_add_options @@ -1768,6 +1808,7 @@ gld${EMULATION_NAME}_add_options { static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:"; static const struct option xtra_long[] = { + {"build-id", optional_argument, NULL, OPTION_BUILD_ID}, EOF if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then @@ -1798,6 +1839,8 @@ cat >>e${EMULATION_NAME}.c <<EOF memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); } +#define DEFAULT_BUILD_ID_STYLE "md5" + static bfd_boolean gld${EMULATION_NAME}_handle_option (int optc) { @@ -1806,6 +1849,18 @@ gld${EMULATION_NAME}_handle_option (int optc) default: return FALSE; + case OPTION_BUILD_ID: + if (link_info.emit_note_gnu_build_id != NULL) + { + free (link_info.emit_note_gnu_build_id); + link_info.emit_note_gnu_build_id = NULL; + } + if (optarg == NULL) + optarg = DEFAULT_BUILD_ID_STYLE; + if (strcmp (optarg, "none")) + link_info.emit_note_gnu_build_id = xstrdup (optarg); + break; + EOF if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then @@ -1959,6 +2014,7 @@ cat >>e${EMULATION_NAME}.c <<EOF static void gld${EMULATION_NAME}_list_options (FILE * file) { + fprintf (file, _(" --build-id[=STYLE]\tGenerate build ID note\n")); EOF if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |