diff options
Diffstat (limited to 'ld/emultempl/elf32.em')
| -rw-r--r-- | ld/emultempl/elf32.em | 64 |
1 files changed, 60 insertions, 4 deletions
diff --git a/ld/emultempl/elf32.em b/ld/emultempl/elf32.em index 0260b7ac44..9468f7d29f 100644 --- a/ld/emultempl/elf32.em +++ b/ld/emultempl/elf32.em @@ -1216,6 +1216,9 @@ gld${EMULATION_NAME}_after_open (void) { struct bfd_link_needed_list *needed, *l; struct elf_link_hash_table *htab; + asection *s; + bfd *abfd; + char leading_char; after_open_default (); @@ -1239,8 +1242,6 @@ gld${EMULATION_NAME}_after_open (void) if (emit_note_gnu_build_id != NULL) { - bfd *abfd; - /* Find an ELF input. */ for (abfd = link_info.input_bfds; abfd != (bfd *) NULL; abfd = abfd->link.next) @@ -1276,11 +1277,66 @@ gld${EMULATION_NAME}_after_open (void) return; } + leading_char = bfd_get_symbol_leading_char (link_info.output_bfd); + + /* Check for input sections whose names match references to + __start_SECNAME or __stop_SECNAME symbols. Mark the matched + symbols as hidden and set start_stop for garbage collection. */ + for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next) + for (s = abfd->sections; s; s = s->next) + { + const char *name = bfd_get_section_name (abfd, s); + const char *ps; + + for (ps = name; *ps != '\0'; ps++) + if (!ISALNUM ((unsigned char) *ps) && *ps != '_') + break; + if (*ps == '\0') + { + struct elf_link_hash_entry *h; + char *symbol = (char *) xmalloc (ps - name + + sizeof "__start_" + 1); + + symbol[0] = leading_char; + sprintf (symbol + (leading_char != 0), "__start_%s", name); + h = elf_link_hash_lookup (elf_hash_table (&link_info), + symbol, FALSE, FALSE, TRUE); + if (h != NULL + && (h->root.type == bfd_link_hash_undefined + || h->root.type == bfd_link_hash_undefweak) + && h->u2.start_stop_section == NULL) + { + h->start_stop = 1; + h->u2.start_stop_section = s; + _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE); + if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) + h->other = ((h->other & ~ELF_ST_VISIBILITY (-1)) + | STV_HIDDEN); + } + + symbol[0] = leading_char; + sprintf (symbol + (leading_char != 0), "__stop_%s", name); + h = elf_link_hash_lookup (elf_hash_table (&link_info), + symbol, FALSE, FALSE, TRUE); + if (h != NULL + && (h->root.type == bfd_link_hash_undefined + || h->root.type == bfd_link_hash_undefweak) + && h->u2.start_stop_section == NULL) + { + h->start_stop = 1; + h->u2.start_stop_section = s; + _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE); + if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) + h->other = ((h->other & ~ELF_ST_VISIBILITY (-1)) + | STV_HIDDEN); + } + } + } + if (!link_info.traditional_format) { - bfd *abfd, *elfbfd = NULL; + bfd *elfbfd = NULL; bfd_boolean warn_eh_frame = FALSE; - asection *s; int seen_type = 0; for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next) |