1 # This shell script emits a C file. -*- C -*-
2 # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003, 2004,
3 # 2005 Free Software Foundation, Inc.
5 # This file is part of GLD, the Gnu Linker.
7 # This program is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program; if not, write to the Free Software
19 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
22 # This file is sourced from elf32.em, and defines extra hppa-elf
25 cat >>e${EMULATION_NAME}.c <<EOF
28 #include "elf32-hppa.h"
31 /* Fake input file for stubs. */
32 static lang_input_statement_type *stub_file;
34 /* Type of import/export stubs to build. For a single sub-space model,
35 we can build smaller import stubs and there is no need for export
37 static int multi_subspace = 0;
39 /* Whether we need to call hppa_layout_sections_again. */
40 static int need_laying_out = 0;
42 /* Maximum size of a group of input sections that can be handled by
43 one stub section. A value of +/-1 indicates the bfd back-end
44 should use a suitable default size. */
45 static bfd_signed_vma group_size = 1;
47 /* Stops the linker merging .text sections on a relocatable link,
48 and adds millicode library to the list of input files. */
51 hppaelf_after_parse (void)
53 if (link_info.relocatable)
54 lang_add_unique (".text");
56 /* Enable this once we split millicode stuff from libgcc:
57 lang_add_input_file ("milli",
58 lang_input_file_is_l_enum,
63 /* This is called before the input files are opened. We create a new
64 fake input file to hold the stub sections. */
67 hppaelf_create_output_section_statements (void)
69 extern const bfd_target bfd_elf32_hppa_linux_vec;
70 extern const bfd_target bfd_elf32_hppa_nbsd_vec;
71 extern const bfd_target bfd_elf32_hppa_vec;
73 if (link_info.hash->creator != &bfd_elf32_hppa_linux_vec
74 && link_info.hash->creator != &bfd_elf32_hppa_nbsd_vec
75 && link_info.hash->creator != &bfd_elf32_hppa_vec)
78 stub_file = lang_add_input_file ("linker stubs",
79 lang_input_file_is_fake_enum,
81 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
82 if (stub_file->the_bfd == NULL
83 || ! bfd_set_arch_mach (stub_file->the_bfd,
84 bfd_get_arch (output_bfd),
85 bfd_get_mach (output_bfd)))
87 einfo ("%X%P: can not create BFD %E\n");
91 stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
92 ldlang_add_file (stub_file);
98 lang_statement_list_type add;
99 asection *input_section;
102 /* Traverse the linker tree to find the spot where the stub goes. */
105 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
107 lang_statement_union_type *l;
110 for (; (l = *lp) != NULL; lp = &l->header.next)
112 switch (l->header.type)
114 case lang_constructors_statement_enum:
115 ret = hook_in_stub (info, &constructor_list.head);
120 case lang_output_section_statement_enum:
121 ret = hook_in_stub (info,
122 &l->output_section_statement.children.head);
127 case lang_wild_statement_enum:
128 ret = hook_in_stub (info, &l->wild_statement.children.head);
133 case lang_group_statement_enum:
134 ret = hook_in_stub (info, &l->group_statement.children.head);
139 case lang_input_section_enum:
140 if (l->input_section.section == info->input_section)
142 /* We've found our section. Insert the stub immediately
143 before its associated input section. */
144 *lp = info->add.head;
145 *(info->add.tail) = l;
150 case lang_data_statement_enum:
151 case lang_reloc_statement_enum:
152 case lang_object_symbols_statement_enum:
153 case lang_output_statement_enum:
154 case lang_target_statement_enum:
155 case lang_input_statement_enum:
156 case lang_assignment_statement_enum:
157 case lang_padding_statement_enum:
158 case lang_address_statement_enum:
159 case lang_fill_statement_enum:
171 /* Call-back for elf32_hppa_size_stubs. */
173 /* Create a new stub section, and arrange for it to be linked
174 immediately before INPUT_SECTION. */
177 hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section)
181 asection *output_section;
183 lang_output_section_statement_type *os;
184 struct hook_stub_info info;
186 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
187 if (stub_sec == NULL)
190 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
191 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
192 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
195 output_section = input_section->output_section;
196 secname = bfd_get_section_name (output_section->owner, output_section);
197 os = lang_output_section_find (secname);
199 info.input_section = input_section;
200 lang_list_init (&info.add);
201 lang_add_section (&info.add, stub_sec, os, stub_file);
203 if (info.add.head == NULL)
206 if (hook_in_stub (&info, &os->children.head))
210 einfo ("%X%P: can not make stub section: %E\n");
215 /* Another call-back for elf32_hppa_size_stubs. */
218 hppaelf_layout_sections_again (void)
220 /* If we have changed sizes of the stub sections, then we need
221 to recalculate all the section offsets. This may mean we need to
222 add even more stubs. */
225 gld${EMULATION_NAME}_layout_sections_again ();
230 build_section_lists (lang_statement_union_type *statement)
232 if (statement->header.type == lang_input_section_enum
233 && !statement->input_section.ifile->just_syms_flag
234 && (statement->input_section.section->flags & SEC_EXCLUDE) == 0
235 && statement->input_section.section->output_section != NULL
236 && statement->input_section.section->output_section->owner == output_bfd)
238 elf32_hppa_next_input_section (&link_info,
239 statement->input_section.section);
244 /* Final emulation specific call. For the PA we use this opportunity
245 to build linker stubs. */
248 hppaelf_finish (void)
250 /* bfd_elf_discard_info just plays with debugging sections,
251 ie. doesn't affect any code, so we can delay resizing the
252 sections. It's likely we'll resize everything in the process of
254 if (bfd_elf_discard_info (output_bfd, &link_info))
257 /* If generating a relocatable output file, then we don't
258 have to examine the relocs. */
259 if (stub_file != NULL && !link_info.relocatable)
261 int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info);
267 einfo ("%X%P: can not size stub section: %E\n");
271 lang_for_each_statement (build_section_lists);
273 /* Call into the BFD backend to do the real work. */
274 if (! elf32_hppa_size_stubs (output_bfd,
279 &hppaelf_add_stub_section,
280 &hppaelf_layout_sections_again))
282 einfo ("%X%P: can not size stub section: %E\n");
289 hppaelf_layout_sections_again ();
291 if (! link_info.relocatable)
293 /* Set the global data pointer. */
294 if (! elf32_hppa_set_gp (output_bfd, &link_info))
296 einfo ("%X%P: can not set gp\n");
300 /* Now build the linker stubs. */
301 if (stub_file != NULL && stub_file->the_bfd->sections != NULL)
303 if (! elf32_hppa_build_stubs (&link_info))
304 einfo ("%X%P: can not build stubs: %E\n");
312 /* Avoid processing the fake stub_file in vercheck, stat_needed and
313 check_needed routines. */
315 static void (*real_func) (lang_input_statement_type *);
317 static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l)
324 hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
327 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
330 #define lang_for_each_input_file hppa_lang_for_each_input_file
334 # Define some shell vars to insert bits of code into the standard elf
335 # parse_args and list_options functions.
337 PARSE_AND_LIST_PROLOGUE='
338 #define OPTION_MULTI_SUBSPACE 301
339 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
342 PARSE_AND_LIST_LONGOPTS='
343 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
344 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
347 PARSE_AND_LIST_OPTIONS='
349 --multi-subspace Generate import and export stubs to support\n\
350 multiple sub-space shared libraries\n"
353 --stub-group-size=N Maximum size of a group of input sections that can be\n\
354 handled by one stub section. A negative value\n\
355 locates all stubs before their branches (with a\n\
356 group size of -N), while a positive value allows\n\
357 two groups of input sections, one before, and one\n\
358 after each stub section. Values of +/-1 indicate\n\
359 the linker should choose suitable defaults.\n"
363 PARSE_AND_LIST_ARGS_CASES='
364 case OPTION_MULTI_SUBSPACE:
368 case OPTION_STUBGROUP_SIZE:
371 group_size = bfd_scan_vma (optarg, &end, 0);
373 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
378 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
380 LDEMUL_AFTER_PARSE=hppaelf_after_parse
381 LDEMUL_FINISH=hppaelf_finish
382 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements