X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Femultempl%2Fppc64elf.em;h=40882ab7bf3e62da5b633c64e081f9570647b3d3;hb=b9c361e0ad33f2c841067fd4bf0959a72ad5a265;hp=094a4fb55ed4363d365b6c8b677600903962a901;hpb=3f764659c7b9bc8eb30920d37a55d3371d649d8a;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/emultempl/ppc64elf.em b/ld/emultempl/ppc64elf.em index 094a4fb55e..40882ab7bf 100644 --- a/ld/emultempl/ppc64elf.em +++ b/ld/emultempl/ppc64elf.em @@ -1,11 +1,12 @@ # This shell script emits a C file. -*- C -*- -# Copyright 2002, 2003, 2004 Free Software Foundation, Inc. +# Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 +# Free Software Foundation, Inc. # -# This file is part of GLD, the Gnu Linker. +# This file is part of the GNU Binutils. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or +# the Free Software Foundation; either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, @@ -15,13 +16,14 @@ # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, +# MA 02110-1301, USA. # # This file is sourced from elf32.em, and defines extra powerpc64-elf # specific routines. # -cat >>e${EMULATION_NAME}.c <creator != &bfd_elf64_powerpc_vec - && link_info.hash->creator != &bfd_elf64_powerpcle_vec) + if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour + && elf_object_id (link_info.output_bfd) == PPC64_ELF_DATA)) return; link_info.wrap_char = '.'; @@ -73,47 +94,196 @@ ppc_create_output_section_statements (void) stub_file = lang_add_input_file ("linker stubs", lang_input_file_is_fake_enum, NULL); - stub_file->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))) + bfd_get_arch (link_info.output_bfd), + bfd_get_mach (link_info.output_bfd))) { - einfo ("%X%P: can not create BFD %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); ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info); } +/* Move the input section statement at *U which happens to be on LIST + to be just before *TO. */ + static void -ppc_before_allocation (void) +move_input_section (lang_statement_list_type *list, + lang_statement_union_type **u, + lang_statement_union_type **to) { - if (stub_file != NULL) + lang_statement_union_type *s = *u; + asection *i = s->input_section.section; + asection *p, *n; + + /* Snip the input section from the statement list. If it was the + last statement, fix the list tail pointer. */ + *u = s->header.next; + if (*u == NULL) + list->tail = u; + /* Add it back in the new position. */ + s->header.next = *to; + *to = s; + if (list->tail == to) + list->tail = &s->header.next; + + /* Trim I off the bfd map_head/map_tail doubly linked lists. */ + n = i->map_head.s; + p = i->map_tail.s; + (p != NULL ? p : i->output_section)->map_head.s = n; + (n != NULL ? n : i->output_section)->map_tail.s = p; + + /* Add I back on in its new position. */ + if (s->header.next->header.type == lang_input_section_enum) { - if (!ppc64_elf_edit_opd (output_bfd, &link_info, non_overlapping_opd)) + n = s->header.next->input_section.section; + p = n->map_tail.s; + } + else + { + /* If the next statement is not an input section statement then + TO must point at the previous input section statement + header.next field. */ + lang_input_section_type *prev = (lang_input_section_type *) + ((char *) to - offsetof (lang_statement_union_type, header.next)); + + ASSERT (prev->header.type == lang_input_section_enum); + p = prev->section; + n = p->map_head.s; + } + i->map_head.s = n; + i->map_tail.s = p; + (p != NULL ? p : i->output_section)->map_head.s = i; + (n != NULL ? n : i->output_section)->map_tail.s = i; +} + +/* Sort input section statements in the linker script tree rooted at + LIST so that those whose owning bfd happens to have a section + called .init or .fini are placed first. Place any TOC sections + referenced by small TOC relocs next, with TOC sections referenced + only by bigtoc relocs last. */ + +static void +sort_toc_sections (lang_statement_list_type *list, + lang_statement_union_type **ini, + lang_statement_union_type **small) +{ + lang_statement_union_type *s, **u; + asection *i; + + u = &list->head; + while ((s = *u) != NULL) + { + switch (s->header.type) { - einfo ("%X%P: can not edit opd %E\n"); - return; + case lang_wild_statement_enum: + sort_toc_sections (&s->wild_statement.children, ini, small); + break; + + case lang_group_statement_enum: + sort_toc_sections (&s->group_statement.children, ini, small); + break; + + case lang_input_section_enum: + i = s->input_section.section; + /* Leave the stub_file .got where it is. We put the .got + header there. */ + if (i->owner == stub_file->the_bfd) + break; + if (bfd_get_section_by_name (i->owner, ".init") != NULL + || bfd_get_section_by_name (i->owner, ".fini") != NULL) + { + if (ini != NULL && *ini != s) + { + move_input_section (list, u, ini); + if (small == ini) + small = &s->header.next; + ini = &s->header.next; + continue; + } + if (small == ini) + small = &s->header.next; + ini = &s->header.next; + break; + } + else if (ini == NULL) + ini = u; + + if (ppc64_elf_has_small_toc_reloc (i)) + { + if (small != NULL && *small != s) + { + move_input_section (list, u, small); + small = &s->header.next; + continue; + } + small = &s->header.next; + } + else if (small == NULL) + small = u; + break; + + default: + break; } + u = &s->header.next; + } +} + +static void +prelim_size_sections (void) +{ + if (expld.phase != lang_mark_phase_enum) + { + expld.phase = lang_mark_phase_enum; + expld.dataseg.phase = exp_dataseg_none; + one_lang_size_sections_pass (NULL, FALSE); + /* We must not cache anything from the preliminary sizing. */ + lang_reset_memory_regions (); + } +} - if (ppc64_elf_tls_setup (output_bfd, &link_info) && !notlsopt) +static void +ppc_before_allocation (void) +{ + if (stub_file != NULL) + { + if (!no_opd_opt + && !ppc64_elf_edit_opd (&link_info, non_overlapping_opd)) + einfo ("%X%P: can not edit %s: %E\n", "opd"); + + if (ppc64_elf_tls_setup (&link_info, no_tls_get_addr_opt, &no_multi_toc) + && !no_tls_opt) { /* Size the sections. This is premature, but we want to know the TLS segment layout so that certain optimizations can be done. */ - lang_size_sections (stat_ptr->head, abs_output_section, - &stat_ptr->head, 0, 0, NULL, TRUE); + prelim_size_sections (); - if (!ppc64_elf_tls_optimize (output_bfd, &link_info)) - { - einfo ("%X%P: TLS problem %E\n"); - return; - } + if (!ppc64_elf_tls_optimize (&link_info)) + einfo ("%X%P: TLS problem %E\n"); + } - /* We must not cache anything from the preliminary sizing. */ - elf_tdata (output_bfd)->program_header_size = 0; - lang_reset_memory_regions (); + if (!no_toc_opt + && !link_info.relocatable) + { + prelim_size_sections (); + + if (!ppc64_elf_edit_toc (&link_info)) + einfo ("%X%P: can not edit %s: %E\n", "toc"); + } + + if (!no_toc_sort) + { + lang_output_section_statement_type *toc_os; + + toc_os = lang_output_section_find (".got"); + if (toc_os != NULL) + sort_toc_sections (&toc_os->children, NULL, NULL); } } @@ -210,13 +380,13 @@ ppc_add_stub_section (const char *stub_sec_name, asection *input_section) lang_output_section_statement_type *os; struct hook_stub_info info; - stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); - if (stub_sec == NULL) - goto err_ret; - flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE - | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); - if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) + | SEC_HAS_CONTENTS | 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 + || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec, + plt_stub_align > 5 ? plt_stub_align : 5)) goto err_ret; output_section = input_section->output_section; @@ -225,7 +395,7 @@ ppc_add_stub_section (const char *stub_sec_name, asection *input_section) info.input_section = input_section; lang_list_init (&info.add); - lang_add_section (&info.add, stub_sec, os, stub_file); + lang_add_section (&info.add, stub_sec, NULL, os); if (info.add.head == NULL) goto err_ret; @@ -248,130 +418,139 @@ ppc_layout_sections_again (void) /* 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. */ - need_laying_out = 0; - - lang_reset_memory_regions (); - - /* Resize the sections. */ - lang_size_sections (stat_ptr->head, abs_output_section, - &stat_ptr->head, 0, 0, NULL, TRUE); - - /* Recalculate TOC base. */ - ldemul_after_allocation (); + gld${EMULATION_NAME}_map_segments (TRUE); - /* Do the assignments again. */ - lang_do_assignments (stat_ptr->head, abs_output_section, NULL, 0); -} - - -/* Call the back-end function to set TOC base after we have placed all - the sections. */ -static void -gld${EMULATION_NAME}_after_allocation (void) -{ if (!link_info.relocatable) - _bfd_set_gp_value (output_bfd, ppc64_elf_toc (output_bfd)); + _bfd_set_gp_value (link_info.output_bfd, + ppc64_elf_toc (link_info.output_bfd)); + + need_laying_out = -1; } static void build_toc_list (lang_statement_union_type *statement) { - if (statement->header.type == lang_input_section_enum - && !statement->input_section.ifile->just_syms_flag - && (statement->input_section.section->flags & SEC_EXCLUDE) == 0 - && statement->input_section.section->output_section == toc_section) - ppc64_elf_next_toc_section (&link_info, statement->input_section.section); + if (statement->header.type == lang_input_section_enum) + { + asection *i = statement->input_section.section; + + if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS + && (i->flags & SEC_EXCLUDE) == 0 + && i->output_section == toc_section) + { + if (!ppc64_elf_next_toc_section (&link_info, i)) + einfo ("%X%P: linker script separates .got and .toc\n"); + } + } } static void build_section_lists (lang_statement_union_type *statement) { - if (statement->header.type == lang_input_section_enum - && !statement->input_section.ifile->just_syms_flag - && (statement->input_section.section->flags & SEC_EXCLUDE) == 0 - && statement->input_section.section->output_section != NULL - && statement->input_section.section->output_section->owner == output_bfd) + if (statement->header.type == lang_input_section_enum) { - if (!ppc64_elf_next_input_section (&link_info, - statement->input_section.section)) - einfo ("%X%P: can not size stub section: %E\n"); + asection *i = statement->input_section.section; + + if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms + && (i->flags & SEC_EXCLUDE) == 0 + && i->output_section != NULL + && i->output_section->owner == link_info.output_bfd) + { + if (!ppc64_elf_next_input_section (&link_info, i)) + einfo ("%X%P: can not size stub section: %E\n"); + } } } -/* Final emulation specific call. */ - +/* Call the back-end function to set TOC base after we have placed all + the sections. */ static void -gld${EMULATION_NAME}_finish (void) +gld${EMULATION_NAME}_after_allocation (void) { - /* e_entry on PowerPC64 points to the function descriptor for - _start. If _start is missing, default to the first function - descriptor in the .opd section. */ - entry_section = ".opd"; - - /* bfd_elf_discard_info just plays with debugging sections, - ie. doesn't affect any code, so we can delay resizing the + /* 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. */ - if (bfd_elf_discard_info (output_bfd, &link_info)) + if (bfd_elf_discard_info (link_info.output_bfd, &link_info)) need_laying_out = 1; /* If generating a relocatable output file, then we don't have any stubs. */ if (stub_file != NULL && !link_info.relocatable) { - int ret = ppc64_elf_setup_section_lists (output_bfd, &link_info); - if (ret != 0) + int ret = ppc64_elf_setup_section_lists (&link_info, + &ppc_add_stub_section, + &ppc_layout_sections_again); + if (ret < 0) + einfo ("%X%P: can not size stub section: %E\n"); + else if (ret > 0) { - if (ret < 0) + ppc64_elf_start_multitoc_partition (&link_info); + + if (!no_multi_toc) { - einfo ("%X%P: can not size stub section: %E\n"); - return; + toc_section = bfd_get_section_by_name (link_info.output_bfd, + ".got"); + if (toc_section != NULL) + lang_for_each_statement (build_toc_list); } - toc_section = bfd_get_section_by_name (output_bfd, ".got"); - if (toc_section != NULL) + if (ppc64_elf_layout_multitoc (&link_info) + && !no_multi_toc + && toc_section != NULL) lang_for_each_statement (build_toc_list); - ppc64_elf_reinit_toc (output_bfd, &link_info); + ppc64_elf_finish_multitoc_partition (&link_info); lang_for_each_statement (build_section_lists); + if (!ppc64_elf_check_init_fini (&link_info)) + einfo ("%P: .init/.fini fragments use differing TOC pointers\n"); + /* Call into the BFD backend to do the real work. */ - if (!ppc64_elf_size_stubs (output_bfd, - &link_info, - group_size, - &ppc_add_stub_section, - &ppc_layout_sections_again)) - { - einfo ("%X%P: can not size stub section: %E\n"); - return; - } + if (!ppc64_elf_size_stubs (&link_info, group_size, + plt_static_chain, plt_thread_safe, + plt_stub_align)) + einfo ("%X%P: can not size stub section: %E\n"); } } - if (need_laying_out) - ppc_layout_sections_again (); - - if (link_info.relocatable) + if (need_laying_out != -1) { - asection *toc = bfd_get_section_by_name (output_bfd, ".toc"); - if (toc != NULL - && bfd_section_size (output_bfd, toc) > 0x10000) - einfo ("%X%P: TOC section size exceeds 64k\n"); + gld${EMULATION_NAME}_map_segments (need_laying_out); + + if (!link_info.relocatable) + _bfd_set_gp_value (link_info.output_bfd, + ppc64_elf_toc (link_info.output_bfd)); } +} + + +/* Final emulation specific call. */ + +static void +gld${EMULATION_NAME}_finish (void) +{ + /* e_entry on PowerPC64 points to the function descriptor for + _start. If _start is missing, default to the first function + descriptor in the .opd section. */ + entry_section = ".opd"; if (stub_added) { char *msg = NULL; char *line, *endline; + if (emit_stub_syms < 0) + emit_stub_syms = 1; if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info, config.stats ? &msg : NULL)) einfo ("%X%P: can not build stubs: %E\n"); + fflush (stdout); for (line = msg; line != NULL; line = endline) { endline = strchr (line, '\n'); @@ -379,11 +558,13 @@ gld${EMULATION_NAME}_finish (void) *endline++ = '\0'; fprintf (stderr, "%s: %s\n", program_name, line); } + fflush (stderr); if (msg != NULL) free (msg); } ppc64_elf_restore_symbols (&link_info); + finish_default (); } @@ -412,7 +593,9 @@ gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry) unsigned int len; char *dot_pat; - if (!dotsyms || entry->pattern[0] == '*' || entry->pattern[0] == '.') + if (!dotsyms + || entry->pattern[0] == '.' + || (!entry->literal && entry->pattern[0] == '*')) return entry; dot_entry = xmalloc (sizeof *dot_entry); @@ -423,14 +606,7 @@ gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry) dot_pat[0] = '.'; memcpy (dot_pat + 1, entry->pattern, len - 1); dot_entry->pattern = dot_pat; - if (entry->symbol != NULL) - { - len = strlen (entry->symbol) + 2; - dot_pat = xmalloc (len); - dot_pat[0] = '.'; - memcpy (dot_pat + 1, entry->symbol, len - 1); - dot_entry->symbol = dot_pat; - } + dot_entry->script = 1; return dot_entry; } @@ -457,59 +633,138 @@ ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) EOF +if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then + fragment <] Align PLT call stubs to fit cache lines.\n" + )); + fprintf (file, _("\ + --no-plt-align Dont'\''t align individual PLT call stubs.\n" + )); + fprintf (file, _("\ + --emit-stub-syms Label linker stubs with a symbol.\n" + )); + fprintf (file, _("\ + --no-emit-stub-syms Don'\''t label linker stubs with a symbol.\n" + )); fprintf (file, _("\ - --stub-group-size=N Maximum size of a group of input sections that can be\n\ - handled by one stub section. A negative value\n\ - locates all stubs before their branches (with a\n\ - group size of -N), while a positive value allows\n\ - two groups of input sections, one before, and one\n\ - after each stub section. Values of +/-1 indicate\n\ - the linker should choose suitable defaults.\n" + --dotsyms For every version pattern \"foo\" in a version\n\ + script, add \".foo\" so that function code\n\ + symbols are treated the same as function\n\ + descriptor symbols. Defaults to on.\n" )); fprintf (file, _("\ - --emit-stub-syms Label linker stubs with a symbol.\n" + --no-dotsyms Don'\''t do anything special in version scripts.\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" + --no-tls-optimize Don'\''t try to optimize TLS accesses.\n" )); fprintf (file, _("\ - --no-dotsyms Don'\''t do anything special in version scripts.\n" + --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call.\n" )); fprintf (file, _("\ - --no-tls-optimize Don'\''t try to optimize TLS accesses.\n" + --no-opd-optimize Don'\''t optimize the OPD section.\n" )); fprintf (file, _("\ - --non-overlapping-opd Canonicalize .opd, so that there are no overlapping\n\ - .opd entries.\n" + --no-toc-optimize Don'\''t optimize the TOC section.\n" + )); + fprintf (file, _("\ + --no-multi-toc Disallow automatic multiple toc sections.\n" + )); + fprintf (file, _("\ + --no-toc-sort Don'\''t sort TOC and GOT sections.\n" + )); + fprintf (file, _("\ + --non-overlapping-opd Canonicalize .opd, so that there are no\n\ + overlapping .opd entries.\n" )); ' -PARSE_AND_LIST_ARGS_CASES=' +PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}' case OPTION_STUBGROUP_SIZE: { const char *end; @@ -519,10 +774,47 @@ PARSE_AND_LIST_ARGS_CASES=' } break; + case OPTION_PLT_STATIC_CHAIN: + plt_static_chain = 1; + break; + + case OPTION_NO_PLT_STATIC_CHAIN: + plt_static_chain = 0; + break; + + case OPTION_PLT_THREAD_SAFE: + plt_thread_safe = 1; + break; + + case OPTION_NO_PLT_THREAD_SAFE: + plt_thread_safe = 0; + break; + + case OPTION_PLT_ALIGN: + if (optarg != NULL) + { + char *end; + unsigned long val = strtoul (optarg, &end, 0); + if (*end || val > 8) + einfo (_("%P%F: invalid --plt-align `%s'\''\n"), optarg); + plt_stub_align = val; + } + else + plt_stub_align = 5; + break; + + case OPTION_NO_PLT_ALIGN: + plt_stub_align = 0; + break; + case OPTION_STUBSYMS: emit_stub_syms = 1; break; + case OPTION_NO_STUBSYMS: + emit_stub_syms = 0; + break; + case OPTION_DOTSYMS: dotsyms = 1; break; @@ -532,7 +824,27 @@ PARSE_AND_LIST_ARGS_CASES=' break; case OPTION_NO_TLS_OPT: - notlsopt = 1; + no_tls_opt = 1; + break; + + case OPTION_NO_TLS_GET_ADDR_OPT: + no_tls_get_addr_opt = 1; + break; + + case OPTION_NO_OPD_OPT: + no_opd_opt = 1; + break; + + case OPTION_NO_TOC_OPT: + no_toc_opt = 1; + break; + + case OPTION_NO_MULTI_TOC: + no_multi_toc = 1; + break; + + case OPTION_NO_TOC_SORT: + no_toc_sort = 1; break; case OPTION_NON_OVERLAPPING_OPD: