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 extern const bfd_target bfd_elf32_hppa_linux_vec;
70 extern const bfd_target bfd_elf32_hppa_vec;
72 if (link_info.hash->creator != &bfd_elf32_hppa_linux_vec
73 && link_info.hash->creator != &bfd_elf32_hppa_vec)
76 stub_file = lang_add_input_file ("linker stubs",
77 lang_input_file_is_fake_enum,
79 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
80 if (stub_file->the_bfd == NULL
81 || ! bfd_set_arch_mach (stub_file->the_bfd,
82 bfd_get_arch (output_bfd),
83 bfd_get_mach (output_bfd)))
85 einfo ("%X%P: can not create BFD %E\n");
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. */
222 lang_reset_memory_regions ();
224 /* Resize the sections. */
225 lang_size_sections (stat_ptr->head, abs_output_section,
226 &stat_ptr->head, 0, (bfd_vma) 0, NULL, TRUE);
228 /* Redo special stuff. */
229 ldemul_after_allocation ();
231 /* Do the assignments again. */
232 lang_do_assignments (stat_ptr->head, abs_output_section,
233 (fill_type *) 0, (bfd_vma) 0);
238 build_section_lists (lang_statement_union_type *statement)
240 if (statement->header.type == lang_input_section_enum
241 && !statement->input_section.ifile->just_syms_flag
242 && statement->input_section.section->output_section != NULL
243 && statement->input_section.section->output_section->owner == output_bfd)
245 elf32_hppa_next_input_section (&link_info,
246 statement->input_section.section);
251 /* Final emulation specific call. For the PA we use this opportunity
252 to build linker stubs. */
255 gld${EMULATION_NAME}_finish (void)
257 /* bfd_elf_discard_info just plays with debugging sections,
258 ie. doesn't affect any code, so we can delay resizing the
259 sections. It's likely we'll resize everything in the process of
261 if (bfd_elf_discard_info (output_bfd, &link_info))
264 /* If generating a relocatable output file, then we don't
265 have to examine the relocs. */
266 if (stub_file != NULL && !link_info.relocatable)
268 int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info);
274 einfo ("%X%P: can not size stub section: %E\n");
278 lang_for_each_statement (build_section_lists);
280 /* Call into the BFD backend to do the real work. */
281 if (! elf32_hppa_size_stubs (output_bfd,
286 &hppaelf_add_stub_section,
287 &hppaelf_layout_sections_again))
289 einfo ("%X%P: can not size stub section: %E\n");
296 hppaelf_layout_sections_again ();
298 if (! link_info.relocatable)
300 /* Set the global data pointer. */
301 if (! elf32_hppa_set_gp (output_bfd, &link_info))
303 einfo ("%X%P: can not set gp\n");
307 /* Now build the linker stubs. */
308 if (stub_file != NULL && stub_file->the_bfd->sections != NULL)
310 if (! elf32_hppa_build_stubs (&link_info))
311 einfo ("%X%P: can not build stubs: %E\n");
317 /* Avoid processing the fake stub_file in vercheck, stat_needed and
318 check_needed routines. */
320 static void (*real_func) (lang_input_statement_type *);
322 static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l)
329 hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
332 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
335 #define lang_for_each_input_file hppa_lang_for_each_input_file
339 # Define some shell vars to insert bits of code into the standard elf
340 # parse_args and list_options functions.
342 PARSE_AND_LIST_PROLOGUE='
343 #define OPTION_MULTI_SUBSPACE 301
344 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
347 PARSE_AND_LIST_LONGOPTS='
348 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
349 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
352 PARSE_AND_LIST_OPTIONS='
354 --multi-subspace Generate import and export stubs to support\n\
355 multiple sub-space shared libraries\n"
358 --stub-group-size=N Maximum size of a group of input sections that can be\n\
359 handled by one stub section. A negative value\n\
360 locates all stubs before their branches (with a\n\
361 group size of -N), while a positive value allows\n\
362 two groups of input sections, one before, and one\n\
363 after each stub section. Values of +/-1 indicate\n\
364 the linker should choose suitable defaults.\n"
368 PARSE_AND_LIST_ARGS_CASES='
369 case OPTION_MULTI_SUBSPACE:
373 case OPTION_STUBGROUP_SIZE:
376 group_size = bfd_scan_vma (optarg, &end, 0);
378 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
383 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
385 LDEMUL_AFTER_PARSE=hppaelf_after_parse
386 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
387 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements