# This shell script emits a C file. -*- C -*- # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003, 2004, # 2005 Free Software Foundation, Inc. # # This file is part of GLD, the Gnu Linker. # # 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 # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # 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. # # This file is sourced from elf32.em, and defines extra hppa-elf # specific routines. # cat >>e${EMULATION_NAME}.c <creator != &bfd_elf32_hppa_linux_vec && link_info.hash->creator != &bfd_elf32_hppa_nbsd_vec && link_info.hash->creator != &bfd_elf32_hppa_vec) return; 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); 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_file->the_bfd->flags |= BFD_LINKER_CREATED; ldlang_add_file (stub_file); } struct hook_stub_info { 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 (l->header.type) { case lang_constructors_statement_enum: ret = hook_in_stub (info, &constructor_list.head); if (ret) return ret; break; case lang_output_section_statement_enum: ret = hook_in_stub (info, &l->output_section_statement.children.head); if (ret) return ret; break; case lang_wild_statement_enum: ret = hook_in_stub (info, &l->wild_statement.children.head); if (ret) return ret; break; 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; 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_statement_enum: case lang_assignment_statement_enum: case lang_padding_statement_enum: case lang_address_statement_enum: case lang_fill_statement_enum: break; default: FAIL (); break; } } return FALSE; } /* 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; const char *secname; 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)) goto err_ret; output_section = input_section->output_section; secname = bfd_get_section_name (output_section->owner, output_section); os = lang_output_section_find (secname); info.input_section = input_section; lang_list_init (&info.add); lang_add_section (&info.add, stub_sec, os, stub_file); 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_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, (bfd_vma) 0, NULL, TRUE); /* 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); } 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) { elf32_hppa_next_input_section (&link_info, statement->input_section.section); } } /* Final emulation specific call. For the PA we use this opportunity to build linker stubs. */ static void gld${EMULATION_NAME}_finish (void) { /* bfd_elf_discard_info just plays with debugging sections, ie. doesn't affect any code, 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)) need_laying_out = 1; /* If generating a relocatable output file, then we don't have to examine the relocs. */ if (stub_file != NULL && !link_info.relocatable) { int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info); if (ret != 0) { if (ret < 0) { einfo ("%X%P: can not size stub section: %E\n"); return; } lang_for_each_statement (build_section_lists); /* Call into the BFD backend to do the real work. */ if (! elf32_hppa_size_stubs (output_bfd, stub_file->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 (need_laying_out) hppaelf_layout_sections_again (); if (! link_info.relocatable) { /* Set the global data pointer. */ if (! elf32_hppa_set_gp (output_bfd, &link_info)) { einfo ("%X%P: can not set gp\n"); return; } /* Now build the linker stubs. */ if (stub_file != NULL && stub_file->the_bfd->sections != NULL) { if (! elf32_hppa_build_stubs (&link_info)) einfo ("%X%P: can not build stubs: %E\n"); } } } /* Avoid processing the fake stub_file in vercheck, stat_needed and check_needed routines. */ static void (*real_func) (lang_input_statement_type *); static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l) { if (l != stub_file) (*real_func) (l); } static void hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) { real_func = func; lang_for_each_input_file (&hppa_for_each_input_file_wrapper); } #define lang_for_each_input_file hppa_lang_for_each_input_file 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 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" )); ' 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 (_("%P%F: invalid number `%s'\''\n"), optarg); } break; ' # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation # LDEMUL_AFTER_PARSE=hppaelf_after_parse LDEMUL_FINISH=gld${EMULATION_NAME}_finish LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements