| # This shell script emits a C file. -*- C -*- |
| # Copyright 1991, 93, 94, 95, 97, 99, 2000, 2001 |
| # 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 <<EOF |
| |
| #include "ldctor.h" |
| #include "elf32-hppa.h" |
| |
| static void hppaelf_after_parse PARAMS((void)); |
| static void hppaelf_create_output_section_statements PARAMS ((void)); |
| static void hppaelf_delete_padding_statements |
| PARAMS ((lang_statement_list_type *)); |
| static asection *hppaelf_add_stub_section |
| PARAMS ((const char *, asection *)); |
| static void hppaelf_layaout_sections_again PARAMS ((void)); |
| static void hppaelf_finish PARAMS ((void)); |
| |
| |
| /* Fake input file for stubs. */ |
| static lang_input_statement_type *stub_file; |
| |
| /* Type of import/export stubs to build. For a single sub-space model, |
| we can build smaller import stubs and there is no need for export |
| stubs. */ |
| static int multi_subspace = 0; |
| |
| /* Maximum size of a group of input sections that can be handled by |
| one stub section. A value of +/-1 indicates the bfd back-end |
| should use a suitable default size. */ |
| static bfd_signed_vma group_size = 1; |
| |
| /* Stops the linker merging .text sections on a relocatable link, |
| and adds millicode library to the list of input files. */ |
| |
| static void |
| hppaelf_after_parse () |
| { |
| if (link_info.relocateable) |
| lang_add_unique (".text"); |
| #if 0 /* enable this once we split millicode stuff from libgcc */ |
| else |
| lang_add_input_file ("milli", |
| lang_input_file_is_l_enum, |
| NULL); |
| #endif |
| } |
| |
| /* This is called before the input files are opened. We create a new |
| fake input file to hold the stub sections. */ |
| |
| static void |
| hppaelf_create_output_section_statements () |
| { |
| 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; |
| } |
| |
| ldlang_add_file (stub_file); |
| } |
| |
| /* Walk all the lang statements splicing out any padding statements from |
| the list. */ |
| |
| static void |
| hppaelf_delete_padding_statements (list) |
| lang_statement_list_type *list; |
| { |
| lang_statement_union_type *s; |
| lang_statement_union_type **ps; |
| for (ps = &list->head; (s = *ps) != NULL; ps = &s->next) |
| { |
| switch (s->header.type) |
| { |
| |
| /* We want to recursively walk these sections. */ |
| case lang_constructors_statement_enum: |
| hppaelf_delete_padding_statements (&constructor_list); |
| break; |
| |
| case lang_output_section_statement_enum: |
| hppaelf_delete_padding_statements (&s->output_section_statement.children); |
| break; |
| |
| case lang_group_statement_enum: |
| hppaelf_delete_padding_statements (&s->group_statement.children); |
| break; |
| |
| case lang_wild_statement_enum: |
| hppaelf_delete_padding_statements (&s->wild_statement.children); |
| break; |
| |
| /* Here's what we are really looking for. Splice these out of |
| the list. */ |
| case lang_padding_statement_enum: |
| *ps = s->next; |
| if (*ps == NULL) |
| list->tail = ps; |
| break; |
| |
| /* We don't care about these cases. */ |
| case lang_data_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_address_statement_enum: |
| break; |
| |
| default: |
| abort (); |
| break; |
| } |
| } |
| } |
| |
| |
| 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 boolean hook_in_stub |
| PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); |
| |
| static boolean |
| hook_in_stub (info, lp) |
| struct hook_stub_info *info; |
| lang_statement_union_type **lp; |
| { |
| lang_statement_union_type *l; |
| boolean ret; |
| |
| for (; (l = *lp) != NULL; lp = &l->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 (stub_sec_name, input_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); |
| wild_doit (&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_layaout_sections_again () |
| { |
| /* 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. */ |
| |
| /* Delete all the padding statements, they're no longer valid. */ |
| hppaelf_delete_padding_statements (stat_ptr); |
| |
| /* 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); |
| } |
| |
| |
| /* Final emulation specific call. For the PA we use this opportunity |
| to build linker stubs. */ |
| |
| static void |
| hppaelf_finish () |
| { |
| /* If generating a relocatable output file, then we don't |
| have to examine the relocs. */ |
| if (link_info.relocateable) |
| return; |
| |
| /* 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_layaout_sections_again)) |
| { |
| einfo ("%X%P: can not size stub section: %E\n"); |
| return; |
| } |
| |
| /* 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->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 hppa_for_each_input_file_wrapper |
| PARAMS ((lang_input_statement_type *)); |
| static void hppa_lang_for_each_input_file |
| PARAMS ((void (*) (lang_input_statement_type *))); |
| |
| static void (*real_func) PARAMS ((lang_input_statement_type *)); |
| |
| static void hppa_for_each_input_file_wrapper (l) |
| lang_input_statement_type *l; |
| { |
| if (l != stub_file) |
| (*real_func) (l); |
| } |
| |
| static void |
| hppa_lang_for_each_input_file (func) |
| void (*func) PARAMS ((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) |
| ' |
| |
| # The options are repeated below so that no abbreviations are allowed. |
| # Otherwise -s matches stub-group-size |
| PARSE_AND_LIST_LONGOPTS=' |
| { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
| { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
| { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
| { "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." |
| )); |
| ' |
| |
| 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=hppaelf_finish |
| LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |