diff options
Diffstat (limited to 'ld/emultempl/ppc64elf.em')
| -rw-r--r-- | ld/emultempl/ppc64elf.em | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/ld/emultempl/ppc64elf.em b/ld/emultempl/ppc64elf.em index a280804..3c1eb8e 100644 --- a/ld/emultempl/ppc64elf.em +++ b/ld/emultempl/ppc64elf.em @@ -38,11 +38,16 @@ static int need_laying_out = 0; should use a suitable default size. */ static bfd_signed_vma group_size = 1; +/* Whether to add ".foo" entries for each "foo" in a version script. */ +static int dotsyms = 1; + static void ppc_create_output_section_statements PARAMS ((void)); static asection *ppc_add_stub_section PARAMS ((const char *, asection *)); static void ppc_layout_sections_again PARAMS ((void)); static void gld${EMULATION_NAME}_after_allocation PARAMS ((void)); static void build_section_lists PARAMS ((lang_statement_union_type *)); +static struct bfd_elf_version_expr *gld${EMULATION_NAME}_new_vers_pattern + PARAMS ((struct bfd_elf_version_expr *)); /* This is called before the input files are opened. We create a new fake input file to hold the stub sections. */ @@ -242,6 +247,7 @@ build_section_lists (statement) } } + /* Final emulation specific call. */ static void @@ -301,6 +307,77 @@ gld${EMULATION_NAME}_finish () } +/* Add a pattern matching ".foo" for every "foo" in a version script. + + The reason for doing this is that many shared library version + scripts export a selected set of functions or data symbols, forcing + others local. eg. + + . VERS_1 { + . global: + . this; that; some; thing; + . local: + . *; + . }; + + To make the above work for PowerPC64, we need to export ".this", + ".that" and so on, otherwise only the function descriptor syms are + exported. Lack of an exported function code sym may cause a + definition to be pulled in from a static library. */ + +struct bfd_elf_version_expr * +gld${EMULATION_NAME}_new_vers_pattern (entry) + struct bfd_elf_version_expr *entry; +{ + struct bfd_elf_version_expr *dot_entry; + struct bfd_elf_version_expr *next; + unsigned int len; + char *dot_pat; + + if (!dotsyms || entry->pattern[0] == '*') + return entry; + + /* Is the script adding ".foo" explicitly? */ + if (entry->pattern[0] == '.') + { + /* We may have added this pattern automatically. Don't add it + again. Quadratic behaviour here is acceptable as the list + may be traversed for each input bfd symbol. */ + for (next = entry->next; next != NULL; next = next->next) + { + if (strcmp (next->pattern, entry->pattern) == 0 + && next->match == entry->match) + { + next = entry->next; + free (entry->pattern); + free (entry); + return next; + } + } + return entry; + } + + /* Don't add ".foo" if the script has already done so. */ + for (next = entry->next; next != NULL; next = next->next) + { + if (next->pattern[0] == '.' + && strcmp (next->pattern + 1, entry->pattern) == 0 + && next->match == entry->match) + return entry; + } + + dot_entry = (struct bfd_elf_version_expr *) xmalloc (sizeof *dot_entry); + dot_entry->next = entry; + len = strlen (entry->pattern) + 2; + dot_pat = xmalloc (len); + dot_pat[0] = '.'; + memcpy (dot_pat + 1, entry->pattern, len - 1); + dot_entry->pattern = dot_pat; + dot_entry->match = entry->match; + return dot_entry; +} + + /* Avoid processing the fake stub_file in vercheck, stat_needed and check_needed routines. */ @@ -335,6 +412,8 @@ EOF # PARSE_AND_LIST_PROLOGUE=' #define OPTION_STUBGROUP_SIZE 301 +#define OPTION_DOTSYMS (OPTION_STUBGROUP_SIZE + 1) +#define OPTION_NO_DOTSYMS (OPTION_DOTSYMS + 1) ' # The options are repeated below so that no abbreviations are allowed. @@ -342,6 +421,10 @@ PARSE_AND_LIST_PROLOGUE=' PARSE_AND_LIST_LONGOPTS=' { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, + { "dotsyms", no_argument, NULL, OPTION_DOTSYMS }, + { "dotsyms", no_argument, NULL, OPTION_DOTSYMS }, + { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS }, + { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS }, ' PARSE_AND_LIST_OPTIONS=' @@ -354,6 +437,15 @@ PARSE_AND_LIST_OPTIONS=' after each stub section. Values of +/-1 indicate\n\ the linker should choose suitable defaults.\n" )); + fprintf (file, _("\ + --dotsyms For every version pattern \"foo\" in a version script,\n\ + add \".foo\" so that function code symbols are\n\ + treated the same as function descriptor symbols.\n\ + Defaults to on.\n" + )); + fprintf (file, _("\ + --no-dotsyms Don'\''t do anything special in version scripts.\n" + )); ' PARSE_AND_LIST_ARGS_CASES=' @@ -365,6 +457,18 @@ PARSE_AND_LIST_ARGS_CASES=' einfo (_("%P%F: invalid number `%s'\''\n"), optarg); } break; + + case OPTION_DOTSYMS: + { + dotsyms = 1; + } + break; + + case OPTION_NO_DOTSYMS: + { + dotsyms = 0; + } + break; ' # Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation @@ -372,3 +476,4 @@ PARSE_AND_LIST_ARGS_CASES=' LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation LDEMUL_FINISH=gld${EMULATION_NAME}_finish LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements +LDEMUL_NEW_VERS_PATTERN=gld${EMULATION_NAME}_new_vers_pattern |