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., 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 /* Maximum size of a group of input sections that can be handled by
40 one stub section. A value of +/-1 indicates the bfd back-end
41 should use a suitable default size. */
42 static bfd_signed_vma group_size = 1;
44 /* Stops the linker merging .text sections on a relocatable link,
45 and adds millicode library to the list of input files. */
48 hppaelf_after_parse (void)
50 if (link_info.relocatable)
51 lang_add_unique (".text");
53 /* Enable this once we split millicode stuff from libgcc:
54 lang_add_input_file ("milli",
55 lang_input_file_is_l_enum,
60 /* This is called before the input files are opened. We create a new
61 fake input file to hold the stub sections. */
64 hppaelf_create_output_section_statements (void)
66 extern const bfd_target bfd_elf32_hppa_linux_vec;
67 extern const bfd_target bfd_elf32_hppa_nbsd_vec;
68 extern const bfd_target bfd_elf32_hppa_vec;
70 if (link_info.hash->creator != &bfd_elf32_hppa_linux_vec
71 && link_info.hash->creator != &bfd_elf32_hppa_nbsd_vec
72 && link_info.hash->creator != &bfd_elf32_hppa_vec)
75 stub_file = lang_add_input_file ("linker stubs",
76 lang_input_file_is_fake_enum,
78 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
79 if (stub_file->the_bfd == NULL
80 || ! bfd_set_arch_mach (stub_file->the_bfd,
81 bfd_get_arch (output_bfd),
82 bfd_get_mach (output_bfd)))
84 einfo ("%X%P: can not create BFD %E\n");
88 stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
89 ldlang_add_file (stub_file);
95 lang_statement_list_type add;
96 asection *input_section;
99 /* Traverse the linker tree to find the spot where the stub goes. */
102 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
104 lang_statement_union_type *l;
107 for (; (l = *lp) != NULL; lp = &l->header.next)
109 switch (l->header.type)
111 case lang_constructors_statement_enum:
112 ret = hook_in_stub (info, &constructor_list.head);
117 case lang_output_section_statement_enum:
118 ret = hook_in_stub (info,
119 &l->output_section_statement.children.head);
124 case lang_wild_statement_enum:
125 ret = hook_in_stub (info, &l->wild_statement.children.head);
130 case lang_group_statement_enum:
131 ret = hook_in_stub (info, &l->group_statement.children.head);
136 case lang_input_section_enum:
137 if (l->input_section.section == info->input_section)
139 /* We've found our section. Insert the stub immediately
140 before its associated input section. */
141 *lp = info->add.head;
142 *(info->add.tail) = l;
147 case lang_data_statement_enum:
148 case lang_reloc_statement_enum:
149 case lang_object_symbols_statement_enum:
150 case lang_output_statement_enum:
151 case lang_target_statement_enum:
152 case lang_input_statement_enum:
153 case lang_assignment_statement_enum:
154 case lang_padding_statement_enum:
155 case lang_address_statement_enum:
156 case lang_fill_statement_enum:
168 /* Call-back for elf32_hppa_size_stubs. */
170 /* Create a new stub section, and arrange for it to be linked
171 immediately before INPUT_SECTION. */
174 hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section)
178 asection *output_section;
180 lang_output_section_statement_type *os;
181 struct hook_stub_info info;
183 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
184 if (stub_sec == NULL)
187 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
188 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
189 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
192 output_section = input_section->output_section;
193 secname = bfd_get_section_name (output_section->owner, output_section);
194 os = lang_output_section_find (secname);
196 info.input_section = input_section;
197 lang_list_init (&info.add);
198 lang_add_section (&info.add, stub_sec, os, stub_file);
200 if (info.add.head == NULL)
203 if (hook_in_stub (&info, &os->children.head))
207 einfo ("%X%P: can not make stub section: %E\n");
212 /* Another call-back for elf32_hppa_size_stubs. */
215 hppaelf_layout_sections_again (void)
217 /* If we have changed sizes of the stub sections, then we need
218 to recalculate all the section offsets. This may mean we need to
219 add even more stubs. */
220 lang_reset_memory_regions ();
222 /* Resize the sections. */
223 lang_size_sections (stat_ptr->head, abs_output_section,
224 &stat_ptr->head, 0, (bfd_vma) 0, NULL, TRUE);
226 /* Redo special stuff. */
227 ldemul_after_allocation ();
229 /* Do the assignments again. */
230 lang_do_assignments (stat_ptr->head, abs_output_section,
231 (fill_type *) 0, (bfd_vma) 0);
236 build_section_lists (lang_statement_union_type *statement)
238 if (statement->header.type == lang_input_section_enum
239 && !statement->input_section.ifile->just_syms_flag
240 && (statement->input_section.section->flags & SEC_EXCLUDE) == 0
241 && statement->input_section.section->output_section != NULL
242 && statement->input_section.section->output_section->owner == output_bfd)
244 elf32_hppa_next_input_section (&link_info,
245 statement->input_section.section);
250 /* Final emulation specific call. For the PA we use this opportunity
251 to build linker stubs. */
254 hppaelf_finish (void)
256 /* If generating a relocatable output file, then we don't
257 have to examine the relocs. */
258 if (stub_file != NULL && !link_info.relocatable)
260 int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info);
266 einfo ("%X%P: can not size stub section: %E\n");
270 lang_for_each_statement (build_section_lists);
272 /* Call into the BFD backend to do the real work. */
273 if (! elf32_hppa_size_stubs (output_bfd,
278 &hppaelf_add_stub_section,
279 &hppaelf_layout_sections_again))
281 einfo ("%X%P: can not size stub section: %E\n");
287 if (! link_info.relocatable)
289 /* Set the global data pointer. */
290 if (! elf32_hppa_set_gp (output_bfd, &link_info))
292 einfo ("%X%P: can not set gp\n");
296 /* Now build the linker stubs. */
297 if (stub_file != NULL && stub_file->the_bfd->sections != NULL)
299 if (! elf32_hppa_build_stubs (&link_info))
301 einfo ("%X%P: can not build stubs: %E\n");
307 gld${EMULATION_NAME}_finish ();
311 /* Avoid processing the fake stub_file in vercheck, stat_needed and
312 check_needed routines. */
314 static void (*real_func) (lang_input_statement_type *);
316 static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l)
323 hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
326 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
329 #define lang_for_each_input_file hppa_lang_for_each_input_file
333 # Define some shell vars to insert bits of code into the standard elf
334 # parse_args and list_options functions.
336 PARSE_AND_LIST_PROLOGUE='
337 #define OPTION_MULTI_SUBSPACE 301
338 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
341 PARSE_AND_LIST_LONGOPTS='
342 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
343 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
346 PARSE_AND_LIST_OPTIONS='
348 --multi-subspace Generate import and export stubs to support\n\
349 multiple sub-space shared libraries\n"
352 --stub-group-size=N Maximum size of a group of input sections that can be\n\
353 handled by one stub section. A negative value\n\
354 locates all stubs before their branches (with a\n\
355 group size of -N), while a positive value allows\n\
356 two groups of input sections, one before, and one\n\
357 after each stub section. Values of +/-1 indicate\n\
358 the linker should choose suitable defaults.\n"
362 PARSE_AND_LIST_ARGS_CASES='
363 case OPTION_MULTI_SUBSPACE:
367 case OPTION_STUBGROUP_SIZE:
370 group_size = bfd_scan_vma (optarg, &end, 0);
372 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
377 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
379 LDEMUL_AFTER_PARSE=hppaelf_after_parse
380 LDEMUL_FINISH=hppaelf_finish
381 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements