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");
55 #if 0 /* 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 stub_file = lang_add_input_file ("linker stubs",
70 lang_input_file_is_fake_enum,
72 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
73 if (stub_file->the_bfd == NULL
74 || ! bfd_set_arch_mach (stub_file->the_bfd,
75 bfd_get_arch (output_bfd),
76 bfd_get_mach (output_bfd)))
78 einfo ("%X%P: can not create BFD %E\n");
82 ldlang_add_file (stub_file);
88 lang_statement_list_type add;
89 asection *input_section;
92 /* Traverse the linker tree to find the spot where the stub goes. */
95 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
97 lang_statement_union_type *l;
100 for (; (l = *lp) != NULL; lp = &l->header.next)
102 switch (l->header.type)
104 case lang_constructors_statement_enum:
105 ret = hook_in_stub (info, &constructor_list.head);
110 case lang_output_section_statement_enum:
111 ret = hook_in_stub (info,
112 &l->output_section_statement.children.head);
117 case lang_wild_statement_enum:
118 ret = hook_in_stub (info, &l->wild_statement.children.head);
123 case lang_group_statement_enum:
124 ret = hook_in_stub (info, &l->group_statement.children.head);
129 case lang_input_section_enum:
130 if (l->input_section.section == info->input_section)
132 /* We've found our section. Insert the stub immediately
133 before its associated input section. */
134 *lp = info->add.head;
135 *(info->add.tail) = l;
140 case lang_data_statement_enum:
141 case lang_reloc_statement_enum:
142 case lang_object_symbols_statement_enum:
143 case lang_output_statement_enum:
144 case lang_target_statement_enum:
145 case lang_input_statement_enum:
146 case lang_assignment_statement_enum:
147 case lang_padding_statement_enum:
148 case lang_address_statement_enum:
149 case lang_fill_statement_enum:
161 /* Call-back for elf32_hppa_size_stubs. */
163 /* Create a new stub section, and arrange for it to be linked
164 immediately before INPUT_SECTION. */
167 hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section)
171 asection *output_section;
173 lang_output_section_statement_type *os;
174 struct hook_stub_info info;
176 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
177 if (stub_sec == NULL)
180 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
181 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
182 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
185 output_section = input_section->output_section;
186 secname = bfd_get_section_name (output_section->owner, output_section);
187 os = lang_output_section_find (secname);
189 info.input_section = input_section;
190 lang_list_init (&info.add);
191 lang_add_section (&info.add, stub_sec, os, stub_file);
193 if (info.add.head == NULL)
196 if (hook_in_stub (&info, &os->children.head))
200 einfo ("%X%P: can not make stub section: %E\n");
205 /* Another call-back for elf32_hppa_size_stubs. */
208 hppaelf_layout_sections_again (void)
210 /* If we have changed sizes of the stub sections, then we need
211 to recalculate all the section offsets. This may mean we need to
212 add even more stubs. */
215 lang_reset_memory_regions ();
217 /* Resize the sections. */
218 lang_size_sections (stat_ptr->head, abs_output_section,
219 &stat_ptr->head, 0, (bfd_vma) 0, NULL, TRUE);
221 /* Redo special stuff. */
222 ldemul_after_allocation ();
224 /* Do the assignments again. */
225 lang_do_assignments (stat_ptr->head, abs_output_section,
226 (fill_type *) 0, (bfd_vma) 0);
231 build_section_lists (lang_statement_union_type *statement)
233 if (statement->header.type == lang_input_section_enum
234 && !statement->input_section.ifile->just_syms_flag
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 gld${EMULATION_NAME}_finish (void)
250 /* bfd_elf32_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${ELFSIZE}_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 (! 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->the_bfd->sections != NULL)
303 if (! elf32_hppa_build_stubs (&link_info))
304 einfo ("%X%P: can not build stubs: %E\n");
310 /* Avoid processing the fake stub_file in vercheck, stat_needed and
311 check_needed routines. */
313 static void (*real_func) (lang_input_statement_type *);
315 static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l)
322 hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
325 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
328 #define lang_for_each_input_file hppa_lang_for_each_input_file
332 # Define some shell vars to insert bits of code into the standard elf
333 # parse_args and list_options functions.
335 PARSE_AND_LIST_PROLOGUE='
336 #define OPTION_MULTI_SUBSPACE 301
337 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
340 PARSE_AND_LIST_LONGOPTS='
341 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
342 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
345 PARSE_AND_LIST_OPTIONS='
347 --multi-subspace Generate import and export stubs to support\n\
348 multiple sub-space shared libraries\n"
351 --stub-group-size=N Maximum size of a group of input sections that can be\n\
352 handled by one stub section. A negative value\n\
353 locates all stubs before their branches (with a\n\
354 group size of -N), while a positive value allows\n\
355 two groups of input sections, one before, and one\n\
356 after each stub section. Values of +/-1 indicate\n\
357 the linker should choose suitable defaults.\n"
361 PARSE_AND_LIST_ARGS_CASES='
362 case OPTION_MULTI_SUBSPACE:
366 case OPTION_STUBGROUP_SIZE:
369 group_size = bfd_scan_vma (optarg, &end, 0);
371 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
376 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
378 LDEMUL_AFTER_PARSE=hppaelf_after_parse
379 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
380 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements