X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Femultempl%2Fhppaelf.em;h=7c47e9918f2f04df43b531fd77840f458dd8452f;hb=f809832224cc45eb58812f6d4bb03cbf52fad980;hp=fde436280050a236bab5c57b7de3b6c5296a8567;hpb=27e232885db363fb545fd2f450e72d929e59b8f6;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/emultempl/hppaelf.em b/ld/emultempl/hppaelf.em index fde4362800..7c47e9918f 100644 --- a/ld/emultempl/hppaelf.em +++ b/ld/emultempl/hppaelf.em @@ -1,288 +1,363 @@ # This shell script emits a C file. -*- C -*- -# It does some substitutions. -cat >e${EMULATION_NAME}.c <the_bfd = bfd_create ("linker stubs", output_bfd); + stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd); if (stub_file->the_bfd == NULL || ! bfd_set_arch_mach (stub_file->the_bfd, - bfd_get_arch (output_bfd), - bfd_get_mach (output_bfd))) - { - einfo ("%X%P: can not create BFD %E\n"); - return; - } - - stub_sec = bfd_make_section_old_way (stub_file->the_bfd, ".text"); - /* Don't set SEC_RELOC until we actually have relocations in this - section. */ - if (stub_sec == NULL - || ! bfd_set_section_flags (stub_file->the_bfd, stub_sec, - (SEC_HAS_CONTENTS - | SEC_ALLOC - | SEC_LOAD - | SEC_CODE - | SEC_IN_MEMORY))) + bfd_get_arch (link_info.output_bfd), + bfd_get_mach (link_info.output_bfd))) { - einfo ("%X%P: can not create stub section: %E\n"); + einfo (_("%F%P: can not create BFD: %E\n")); return; } + stub_file->the_bfd->flags |= BFD_LINKER_CREATED; ldlang_add_file (stub_file); + elf32_hppa_init_stub_bfd (stub_file->the_bfd, &link_info); } -/* Walk all the lang statements splicing out any padding statements from - the list. */ -static void -hppaelf_delete_padding_statements (s, prev) - lang_statement_union_type *s; - lang_statement_union_type **prev; +struct hook_stub_info { - lang_statement_union_type *sprev = NULL; - for (; s != NULL; s = s->next) + lang_statement_list_type add; + asection *input_section; +}; + +/* Traverse the linker tree to find the spot where the stub goes. */ + +static bfd_boolean +hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) +{ + lang_statement_union_type *l; + bfd_boolean ret; + + for (; (l = *lp) != NULL; lp = &l->header.next) { - switch (s->header.type) + switch (l->header.type) { - - /* We want recursively walk these sections. */ case lang_constructors_statement_enum: - hppaelf_delete_padding_statements (constructor_list.head, - &constructor_list.head); + ret = hook_in_stub (info, &constructor_list.head); + if (ret) + return ret; break; case lang_output_section_statement_enum: - hppaelf_delete_padding_statements (s->output_section_statement. - children.head, - &s->output_section_statement. - children.head); + ret = hook_in_stub (info, + &l->output_section_statement.children.head); + if (ret) + return ret; break; - /* Huh? What is a lang_wild_statement? */ case lang_wild_statement_enum: - hppaelf_delete_padding_statements (s->wild_statement. - children.head, - &s->wild_statement. - children.head); + ret = hook_in_stub (info, &l->wild_statement.children.head); + if (ret) + return ret; break; - /* Here's what we are really looking for. Splice these out of - the list. */ - case lang_padding_statement_enum: - if (sprev) - sprev->header.next = s->header.next; - else - **prev = *s; + case lang_group_statement_enum: + ret = hook_in_stub (info, &l->group_statement.children.head); + if (ret) + return ret; + break; + + case lang_input_section_enum: + if (l->input_section.section == info->input_section) + { + /* We've found our section. Insert the stub immediately + before its associated input section. */ + *lp = info->add.head; + *(info->add.tail) = l; + return TRUE; + } break; - /* We don't care about these cases. */ case lang_data_statement_enum: + case lang_reloc_statement_enum: case lang_object_symbols_statement_enum: case lang_output_statement_enum: case lang_target_statement_enum: - case lang_input_section_enum: case lang_input_statement_enum: case lang_assignment_statement_enum: + case lang_padding_statement_enum: case lang_address_statement_enum: + case lang_fill_statement_enum: break; default: - abort (); + FAIL (); break; } - sprev = s; } + return FALSE; } -/* Final emulation specific call. For the PA we use this opportunity - to build linker stubs. */ + +/* Call-back for elf32_hppa_size_stubs. */ + +/* Create a new stub section, and arrange for it to be linked + immediately before INPUT_SECTION. */ + +static asection * +hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section) +{ + asection *stub_sec; + flagword flags; + asection *output_section; + lang_output_section_statement_type *os; + struct hook_stub_info info; + + flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE + | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); + stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd, + stub_sec_name, flags); + if (stub_sec == NULL) + goto err_ret; + + output_section = input_section->output_section; + os = lang_output_section_get (output_section); + + info.input_section = input_section; + lang_list_init (&info.add); + lang_add_section (&info.add, stub_sec, NULL, os); + + if (info.add.head == NULL) + goto err_ret; + + if (hook_in_stub (&info, &os->children.head)) + return stub_sec; + + err_ret: + einfo (_("%X%P: can not make stub section: %E\n")); + return NULL; +} + + +/* Another call-back for elf32_hppa_size_stubs. */ static void -hppaelf_finish () +hppaelf_layout_sections_again (void) { - /* Call into the BFD backend to do the real work. */ - if (elf32_hppa_size_stubs (stub_file->the_bfd, output_bfd, &link_info) - == false) - { - einfo ("%X%P: can not size stub section: %E\n"); - return; - } - - /* If the size of the stub section is nonzero, then we need - to resize the sections, recompute the assignments, and finally - build the stubs. */ - if (bfd_section_size (stub_file->the_bfd, stub_file->the_bfd->sections) != 0) + /* If we have changed sizes of the stub sections, then we need + to recalculate all the section offsets. This may mean we need to + add even more stubs. */ + ldelf_map_segments (TRUE); + need_laying_out = -1; +} + + +static void +build_section_lists (lang_statement_union_type *statement) +{ + if (statement->header.type == lang_input_section_enum) { - /* Delete all the padding statements, they're no longer valid. */ - hppaelf_delete_padding_statements (stat_ptr->head, &stat_ptr->head); - - /* Resize the sections. */ - lang_size_sections (stat_ptr->head, abs_output_section, - &stat_ptr->head, 0, (bfd_vma) 0, false); - - /* Redo special stuff. */ - ldemul_after_allocation (); - - /* Do the assignments again. */ - lang_do_assignments (stat_ptr->head, - abs_output_section, - (fill_type) 0, (bfd_vma) 0); - - /* Now build the linker stubs. */ - if (elf32_hppa_build_stubs (stub_file->the_bfd, &link_info) == false) + asection *i = statement->input_section.section; + + if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS + && (i->flags & SEC_EXCLUDE) == 0 + && i->output_section != NULL + && i->output_section->owner == link_info.output_bfd) { - einfo ("%X%P: can not build stubs: %E\n"); - return; + elf32_hppa_next_input_section (&link_info, i); } } } -/* The script itself gets inserted here. */ -static char * -hppaelf_get_script(isfile) - int *isfile; -EOF +/* For the PA we use this opportunity to size and build linker stubs. */ -if test -n "$COMPILE_IN" -then -# Scripts compiled in. - -# sed commands to quote an ld script as a C string. -sc="-f stringify.sed" +static void +gld${EMULATION_NAME}_after_allocation (void) +{ + int ret; + + /* bfd_elf_discard_info just plays with data and debugging sections, + ie. doesn't affect code size, so we can delay resizing the + sections. It's likely we'll resize everything in the process of + adding stubs. */ + ret = bfd_elf_discard_info (link_info.output_bfd, &link_info); + if (ret < 0) + { + einfo (_("%X%P: .eh_frame/.stab edit: %E\n")); + return; + } + else if (ret > 0) + need_laying_out = 1; -cat >>e${EMULATION_NAME}.c <the_bfd, + &link_info, + multi_subspace, + group_size, + &hppaelf_add_stub_section, + &hppaelf_layout_sections_again)) + { + einfo (_("%X%P: can not size stub section: %E\n")); + return; + } + } + } - if (link_info.relocateable == true && config.build_constructors == true) - return -EOF -sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c -echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c -echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c -echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c -echo ' ; else return' >> e${EMULATION_NAME}.c -sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c -echo '; }' >> e${EMULATION_NAME}.c - -else -# Scripts read from the filesystem. - -cat >>e${EMULATION_NAME}.c <>e${EMULATION_NAME}.c <the_bfd->sections != NULL) + { + if (! elf32_hppa_build_stubs (&link_info)) + einfo (_("%X%P: can not build stubs: %E\n")); + } + } +} -struct ld_emulation_xfer_struct ld_hppaelf_emulation = -{ - hppaelf_before_parse, - syslib_default, - hll_default, - after_parse_default, - after_open_default, - after_allocation_default, - hppaelf_set_output_arch, - ldemul_default_target, - before_allocation_default, - hppaelf_get_script, - "hppaelf", - "elf32-hppa", - hppaelf_finish, - hppaelf_create_output_section_statements, - NULL, /* open dynamic archive */ - NULL, /* place orphan */ - NULL, /* set symbols */ - NULL, /* parse args */ - NULL, /* unrecognized file */ - NULL, /* list options */ - NULL, /* recognized file */ - NULL /* find_potential_libraries */ -}; EOF + +# Define some shell vars to insert bits of code into the standard elf +# parse_args and list_options functions. +# +PARSE_AND_LIST_PROLOGUE=' +#define OPTION_MULTI_SUBSPACE 301 +#define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) +' + +PARSE_AND_LIST_LONGOPTS=' + { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, + { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, +' + +PARSE_AND_LIST_OPTIONS=' + fprintf (file, _("\ + --multi-subspace Generate import and export stubs to support\n\ + multiple sub-space shared libraries\n" + )); + fprintf (file, _("\ + --stub-group-size=N Maximum size of a group of input sections that\n\ + can be handled by one stub section. A negative\n\ + value locates all stubs before their branches\n\ + (with a group size of -N), while a positive\n\ + value allows two groups of input sections, one\n\ + before, and one after each stub section.\n\ + Values of +/-1 indicate the linker should\n\ + choose suitable defaults.\n" + )); +' + +PARSE_AND_LIST_ARGS_CASES=' + case OPTION_MULTI_SUBSPACE: + multi_subspace = 1; + break; + + case OPTION_STUBGROUP_SIZE: + { + const char *end; + group_size = bfd_scan_vma (optarg, &end, 0); + if (*end) + einfo (_("%F%P: invalid number `%s'\''\n"), optarg); + } + break; +' + +# Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation +# +LDEMUL_AFTER_PARSE=hppaelf_after_parse +LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation +LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements