1 # This shell script emits a C file. -*- C -*-
2 # Copyright (C) 1991, 93, 94, 95, 97, 99, 2000
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"
30 static void hppaelf_create_output_section_statements PARAMS ((void));
31 static void hppaelf_delete_padding_statements
32 PARAMS ((lang_statement_list_type *));
33 static asection *hppaelf_add_stub_section
34 PARAMS ((const char *, asection *));
35 static void hppaelf_layaout_sections_again PARAMS ((void));
36 static void hppaelf_finish PARAMS ((void));
39 /* Fake input file for stubs. */
40 static lang_input_statement_type *stub_file;
42 /* Type of import/export stubs to build. For a single sub-space model,
43 we can build smaller import stubs and there is no need for export
45 static int multi_subspace = 0;
47 /* Maximum size of a group of input sections that can be handled by
48 one stub section. A value of +/-1 indicates the bfd back-end
49 should use a suitable default size. */
50 static bfd_signed_vma group_size = 1;
52 /* This is called before the input files are opened. We create a new
53 fake input file to hold the stub sections. */
56 hppaelf_create_output_section_statements ()
58 stub_file = lang_add_input_file ("linker stubs",
59 lang_input_file_is_fake_enum,
61 stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
62 if (stub_file->the_bfd == NULL
63 || ! bfd_set_arch_mach (stub_file->the_bfd,
64 bfd_get_arch (output_bfd),
65 bfd_get_mach (output_bfd)))
67 einfo ("%X%P: can not create BFD %E\n");
71 ldlang_add_file (stub_file);
74 /* Walk all the lang statements splicing out any padding statements from
78 hppaelf_delete_padding_statements (list)
79 lang_statement_list_type *list;
81 lang_statement_union_type *s;
82 lang_statement_union_type **ps;
83 for (ps = &list->head; (s = *ps) != NULL; ps = &s->next)
85 switch (s->header.type)
88 /* We want to recursively walk these sections. */
89 case lang_constructors_statement_enum:
90 hppaelf_delete_padding_statements (&constructor_list);
93 case lang_output_section_statement_enum:
94 hppaelf_delete_padding_statements (&s->output_section_statement.children);
97 case lang_group_statement_enum:
98 hppaelf_delete_padding_statements (&s->group_statement.children);
101 case lang_wild_statement_enum:
102 hppaelf_delete_padding_statements (&s->wild_statement.children);
105 /* Here's what we are really looking for. Splice these out of
107 case lang_padding_statement_enum:
113 /* We don't care about these cases. */
114 case lang_data_statement_enum:
115 case lang_object_symbols_statement_enum:
116 case lang_output_statement_enum:
117 case lang_target_statement_enum:
118 case lang_input_section_enum:
119 case lang_input_statement_enum:
120 case lang_assignment_statement_enum:
121 case lang_address_statement_enum:
132 struct hook_stub_info
134 lang_statement_list_type add;
135 asection *input_section;
138 /* Traverse the linker tree to find the spot where the stub goes. */
140 static boolean hook_in_stub
141 PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
144 hook_in_stub (info, lp)
145 struct hook_stub_info *info;
146 lang_statement_union_type **lp;
148 lang_statement_union_type *l;
151 for (; (l = *lp) != NULL; lp = &l->next)
153 switch (l->header.type)
155 case lang_constructors_statement_enum:
156 ret = hook_in_stub (info, &constructor_list.head);
161 case lang_output_section_statement_enum:
162 ret = hook_in_stub (info,
163 &l->output_section_statement.children.head);
168 case lang_wild_statement_enum:
169 ret = hook_in_stub (info, &l->wild_statement.children.head);
174 case lang_group_statement_enum:
175 ret = hook_in_stub (info, &l->group_statement.children.head);
180 case lang_input_section_enum:
181 if (l->input_section.section == info->input_section)
183 /* We've found our section. Insert the stub immediately
184 before its associated input section. */
185 *lp = info->add.head;
186 *(info->add.tail) = l;
191 case lang_data_statement_enum:
192 case lang_reloc_statement_enum:
193 case lang_object_symbols_statement_enum:
194 case lang_output_statement_enum:
195 case lang_target_statement_enum:
196 case lang_input_statement_enum:
197 case lang_assignment_statement_enum:
198 case lang_padding_statement_enum:
199 case lang_address_statement_enum:
200 case lang_fill_statement_enum:
212 /* Call-back for elf32_hppa_size_stubs. */
214 /* Create a new stub section, and arrange for it to be linked
215 immediately before INPUT_SECTION. */
218 hppaelf_add_stub_section (stub_sec_name, input_section)
219 const char *stub_sec_name;
220 asection *input_section;
224 asection *output_section;
226 lang_output_section_statement_type *os;
227 struct hook_stub_info info;
229 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
230 if (stub_sec == NULL)
233 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
234 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
235 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
238 output_section = input_section->output_section;
239 secname = bfd_get_section_name (output_section->owner, output_section);
240 os = lang_output_section_find (secname);
242 info.input_section = input_section;
243 lang_list_init (&info.add);
244 wild_doit (&info.add, stub_sec, os, stub_file);
246 if (info.add.head == NULL)
249 if (hook_in_stub (&info, &os->children.head))
253 einfo ("%X%P: can not make stub section: %E\n");
258 /* Another call-back for elf32_hppa_size_stubs. */
261 hppaelf_layaout_sections_again ()
263 /* If we have changed sizes of the stub sections, then we need
264 to recalculate all the section offsets. This may mean we need to
265 add even more stubs. */
267 /* Delete all the padding statements, they're no longer valid. */
268 hppaelf_delete_padding_statements (stat_ptr);
270 /* Resize the sections. */
271 lang_size_sections (stat_ptr->head, abs_output_section,
272 &stat_ptr->head, 0, (bfd_vma) 0, false);
274 /* Redo special stuff. */
275 ldemul_after_allocation ();
277 /* Do the assignments again. */
278 lang_do_assignments (stat_ptr->head, abs_output_section,
279 (fill_type) 0, (bfd_vma) 0);
283 /* Final emulation specific call. For the PA we use this opportunity
284 to build linker stubs. */
289 /* If generating a relocateable output file, then we don't
290 have to examine the relocs. */
291 if (link_info.relocateable)
294 /* Call into the BFD backend to do the real work. */
295 if (! elf32_hppa_size_stubs (output_bfd,
300 &hppaelf_add_stub_section,
301 &hppaelf_layaout_sections_again))
303 einfo ("%X%P: can not size stub section: %E\n");
307 /* Set the global data pointer. */
308 if (! elf32_hppa_set_gp (output_bfd, &link_info))
310 einfo ("%X%P: can not set gp\n");
314 /* Now build the linker stubs. */
315 if (stub_file->the_bfd->sections != NULL)
317 if (! elf32_hppa_build_stubs (&link_info))
318 einfo ("%X%P: can not build stubs: %E\n");
323 /* Avoid processing the fake stub_file in vercheck, stat_needed and
324 check_needed routines. */
326 static void hppa_for_each_input_file_wrapper
327 PARAMS ((lang_input_statement_type *));
328 static void hppa_lang_for_each_input_file
329 PARAMS ((void (*) (lang_input_statement_type *)));
331 static void (*real_func) PARAMS ((lang_input_statement_type *));
333 static void hppa_for_each_input_file_wrapper (l)
334 lang_input_statement_type *l;
341 hppa_lang_for_each_input_file (func)
342 void (*func) PARAMS ((lang_input_statement_type *));
345 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
348 #define lang_for_each_input_file hppa_lang_for_each_input_file
352 # Define some shell vars to insert bits of code into the standard elf
353 # parse_args and list_options functions.
355 PARSE_AND_LIST_PROLOGUE='
356 #define OPTION_MULTI_SUBSPACE 301
357 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
360 # The options are repeated below so that no abbreviations are allowed.
361 # Otherwise -s matches stub-group-size
362 PARSE_AND_LIST_LONGOPTS='
363 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
364 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
365 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
366 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
369 PARSE_AND_LIST_OPTIONS='
371 --multi-subspace Generate import and export stubs to support\n\
372 multiple sub-space shared libraries\n"
375 --stub-group-size=N Maximum size of a group of input sections that can be\n\
376 handled by one stub section. A negative value\n\
377 locates all stubs before their branches (with a\n\
378 group size of -N), while a positive value allows\n\
379 two groups of input sections, one before, and one\n\
380 after each stub section. Values of +/-1 indicate\n\
381 the linker should choose suitable defaults."
385 PARSE_AND_LIST_ARGS_CASES='
386 case OPTION_MULTI_SUBSPACE:
390 case OPTION_STUBGROUP_SIZE:
393 group_size = bfd_scan_vma (optarg, &end, 0);
395 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
400 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
402 LDEMUL_FINISH=hppaelf_finish
403 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements