1 # This shell script emits a C file. -*- C -*-
2 # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003
3 # 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 ldlang_add_file (stub_file);
97 lang_statement_list_type add;
98 asection *input_section;
101 /* Traverse the linker tree to find the spot where the stub goes. */
104 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
106 lang_statement_union_type *l;
109 for (; (l = *lp) != NULL; lp = &l->header.next)
111 switch (l->header.type)
113 case lang_constructors_statement_enum:
114 ret = hook_in_stub (info, &constructor_list.head);
119 case lang_output_section_statement_enum:
120 ret = hook_in_stub (info,
121 &l->output_section_statement.children.head);
126 case lang_wild_statement_enum:
127 ret = hook_in_stub (info, &l->wild_statement.children.head);
132 case lang_group_statement_enum:
133 ret = hook_in_stub (info, &l->group_statement.children.head);
138 case lang_input_section_enum:
139 if (l->input_section.section == info->input_section)
141 /* We've found our section. Insert the stub immediately
142 before its associated input section. */
143 *lp = info->add.head;
144 *(info->add.tail) = l;
149 case lang_data_statement_enum:
150 case lang_reloc_statement_enum:
151 case lang_object_symbols_statement_enum:
152 case lang_output_statement_enum:
153 case lang_target_statement_enum:
154 case lang_input_statement_enum:
155 case lang_assignment_statement_enum:
156 case lang_padding_statement_enum:
157 case lang_address_statement_enum:
158 case lang_fill_statement_enum:
170 /* Call-back for elf32_hppa_size_stubs. */
172 /* Create a new stub section, and arrange for it to be linked
173 immediately before INPUT_SECTION. */
176 hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section)
180 asection *output_section;
182 lang_output_section_statement_type *os;
183 struct hook_stub_info info;
185 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
186 if (stub_sec == NULL)
189 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
190 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
191 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
194 output_section = input_section->output_section;
195 secname = bfd_get_section_name (output_section->owner, output_section);
196 os = lang_output_section_find (secname);
198 info.input_section = input_section;
199 lang_list_init (&info.add);
200 lang_add_section (&info.add, stub_sec, os, stub_file);
202 if (info.add.head == NULL)
205 if (hook_in_stub (&info, &os->children.head))
209 einfo ("%X%P: can not make stub section: %E\n");
214 /* Another call-back for elf32_hppa_size_stubs. */
217 hppaelf_layout_sections_again (void)
219 /* If we have changed sizes of the stub sections, then we need
220 to recalculate all the section offsets. This may mean we need to
221 add even more stubs. */
224 lang_reset_memory_regions ();
226 /* Resize the sections. */
227 lang_size_sections (stat_ptr->head, abs_output_section,
228 &stat_ptr->head, 0, (bfd_vma) 0, NULL, TRUE);
230 /* Redo special stuff. */
231 ldemul_after_allocation ();
233 /* Do the assignments again. */
234 lang_do_assignments (stat_ptr->head, abs_output_section,
235 (fill_type *) 0, (bfd_vma) 0);
240 build_section_lists (lang_statement_union_type *statement)
242 if (statement->header.type == lang_input_section_enum
243 && !statement->input_section.ifile->just_syms_flag
244 && (statement->input_section.section->flags & SEC_EXCLUDE) == 0
245 && statement->input_section.section->output_section != NULL
246 && statement->input_section.section->output_section->owner == output_bfd)
248 elf32_hppa_next_input_section (&link_info,
249 statement->input_section.section);
254 /* Final emulation specific call. For the PA we use this opportunity
255 to build linker stubs. */
258 gld${EMULATION_NAME}_finish (void)
260 /* bfd_elf_discard_info just plays with debugging sections,
261 ie. doesn't affect any code, so we can delay resizing the
262 sections. It's likely we'll resize everything in the process of
264 if (bfd_elf_discard_info (output_bfd, &link_info))
267 /* If generating a relocatable output file, then we don't
268 have to examine the relocs. */
269 if (stub_file != NULL && !link_info.relocatable)
271 int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info);
277 einfo ("%X%P: can not size stub section: %E\n");
281 lang_for_each_statement (build_section_lists);
283 /* Call into the BFD backend to do the real work. */
284 if (! elf32_hppa_size_stubs (output_bfd,
289 &hppaelf_add_stub_section,
290 &hppaelf_layout_sections_again))
292 einfo ("%X%P: can not size stub section: %E\n");
299 hppaelf_layout_sections_again ();
301 if (! link_info.relocatable)
303 /* Set the global data pointer. */
304 if (! elf32_hppa_set_gp (output_bfd, &link_info))
306 einfo ("%X%P: can not set gp\n");
310 /* Now build the linker stubs. */
311 if (stub_file != NULL && stub_file->the_bfd->sections != NULL)
313 if (! elf32_hppa_build_stubs (&link_info))
314 einfo ("%X%P: can not build stubs: %E\n");
320 /* Avoid processing the fake stub_file in vercheck, stat_needed and
321 check_needed routines. */
323 static void (*real_func) (lang_input_statement_type *);
325 static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l)
332 hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
335 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
338 #define lang_for_each_input_file hppa_lang_for_each_input_file
342 # Define some shell vars to insert bits of code into the standard elf
343 # parse_args and list_options functions.
345 PARSE_AND_LIST_PROLOGUE='
346 #define OPTION_MULTI_SUBSPACE 301
347 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
350 PARSE_AND_LIST_LONGOPTS='
351 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
352 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
355 PARSE_AND_LIST_OPTIONS='
357 --multi-subspace Generate import and export stubs to support\n\
358 multiple sub-space shared libraries\n"
361 --stub-group-size=N Maximum size of a group of input sections that can be\n\
362 handled by one stub section. A negative value\n\
363 locates all stubs before their branches (with a\n\
364 group size of -N), while a positive value allows\n\
365 two groups of input sections, one before, and one\n\
366 after each stub section. Values of +/-1 indicate\n\
367 the linker should choose suitable defaults.\n"
371 PARSE_AND_LIST_ARGS_CASES='
372 case OPTION_MULTI_SUBSPACE:
376 case OPTION_STUBGROUP_SIZE:
379 group_size = bfd_scan_vma (optarg, &end, 0);
381 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
386 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
388 LDEMUL_AFTER_PARSE=hppaelf_after_parse
389 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
390 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements