1 # This shell script emits a C file. -*- C -*-
2 # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001
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_after_parse PARAMS((void));
31 static void hppaelf_create_output_section_statements PARAMS ((void));
32 static void hppaelf_delete_padding_statements
33 PARAMS ((lang_statement_list_type *));
34 static asection *hppaelf_add_stub_section
35 PARAMS ((const char *, asection *));
36 static void hppaelf_layaout_sections_again PARAMS ((void));
37 static void hppaelf_finish PARAMS ((void));
40 /* Fake input file for stubs. */
41 static lang_input_statement_type *stub_file;
43 /* Type of import/export stubs to build. For a single sub-space model,
44 we can build smaller import stubs and there is no need for export
46 static int multi_subspace = 0;
48 /* Maximum size of a group of input sections that can be handled by
49 one stub section. A value of +/-1 indicates the bfd back-end
50 should use a suitable default size. */
51 static bfd_signed_vma group_size = 1;
53 /* Stops the linker merging .text sections on a relocatable link,
54 and adds millicode library to the list of input files. */
57 hppaelf_after_parse ()
59 if (link_info.relocateable)
60 lang_add_unique (".text");
61 #if 0 /* enable this once we split millicode stuff from libgcc */
63 lang_add_input_file ("milli",
64 lang_input_file_is_l_enum,
69 /* This is called before the input files are opened. We create a new
70 fake input file to hold the stub sections. */
73 hppaelf_create_output_section_statements ()
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 ldlang_add_file (stub_file);
91 /* Walk all the lang statements splicing out any padding statements from
95 hppaelf_delete_padding_statements (list)
96 lang_statement_list_type *list;
98 lang_statement_union_type *s;
99 lang_statement_union_type **ps;
100 for (ps = &list->head; (s = *ps) != NULL; ps = &s->next)
102 switch (s->header.type)
105 /* We want to recursively walk these sections. */
106 case lang_constructors_statement_enum:
107 hppaelf_delete_padding_statements (&constructor_list);
110 case lang_output_section_statement_enum:
111 hppaelf_delete_padding_statements (&s->output_section_statement.children);
114 case lang_group_statement_enum:
115 hppaelf_delete_padding_statements (&s->group_statement.children);
118 case lang_wild_statement_enum:
119 hppaelf_delete_padding_statements (&s->wild_statement.children);
122 /* Here's what we are really looking for. Splice these out of
124 case lang_padding_statement_enum:
130 /* We don't care about these cases. */
131 case lang_data_statement_enum:
132 case lang_object_symbols_statement_enum:
133 case lang_output_statement_enum:
134 case lang_target_statement_enum:
135 case lang_input_section_enum:
136 case lang_input_statement_enum:
137 case lang_assignment_statement_enum:
138 case lang_address_statement_enum:
149 struct hook_stub_info
151 lang_statement_list_type add;
152 asection *input_section;
155 /* Traverse the linker tree to find the spot where the stub goes. */
157 static boolean hook_in_stub
158 PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
161 hook_in_stub (info, lp)
162 struct hook_stub_info *info;
163 lang_statement_union_type **lp;
165 lang_statement_union_type *l;
168 for (; (l = *lp) != NULL; lp = &l->next)
170 switch (l->header.type)
172 case lang_constructors_statement_enum:
173 ret = hook_in_stub (info, &constructor_list.head);
178 case lang_output_section_statement_enum:
179 ret = hook_in_stub (info,
180 &l->output_section_statement.children.head);
185 case lang_wild_statement_enum:
186 ret = hook_in_stub (info, &l->wild_statement.children.head);
191 case lang_group_statement_enum:
192 ret = hook_in_stub (info, &l->group_statement.children.head);
197 case lang_input_section_enum:
198 if (l->input_section.section == info->input_section)
200 /* We've found our section. Insert the stub immediately
201 before its associated input section. */
202 *lp = info->add.head;
203 *(info->add.tail) = l;
208 case lang_data_statement_enum:
209 case lang_reloc_statement_enum:
210 case lang_object_symbols_statement_enum:
211 case lang_output_statement_enum:
212 case lang_target_statement_enum:
213 case lang_input_statement_enum:
214 case lang_assignment_statement_enum:
215 case lang_padding_statement_enum:
216 case lang_address_statement_enum:
217 case lang_fill_statement_enum:
229 /* Call-back for elf32_hppa_size_stubs. */
231 /* Create a new stub section, and arrange for it to be linked
232 immediately before INPUT_SECTION. */
235 hppaelf_add_stub_section (stub_sec_name, input_section)
236 const char *stub_sec_name;
237 asection *input_section;
241 asection *output_section;
243 lang_output_section_statement_type *os;
244 struct hook_stub_info info;
246 stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
247 if (stub_sec == NULL)
250 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
251 | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
252 if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
255 output_section = input_section->output_section;
256 secname = bfd_get_section_name (output_section->owner, output_section);
257 os = lang_output_section_find (secname);
259 info.input_section = input_section;
260 lang_list_init (&info.add);
261 wild_doit (&info.add, stub_sec, os, stub_file);
263 if (info.add.head == NULL)
266 if (hook_in_stub (&info, &os->children.head))
270 einfo ("%X%P: can not make stub section: %E\n");
275 /* Another call-back for elf32_hppa_size_stubs. */
278 hppaelf_layaout_sections_again ()
280 /* If we have changed sizes of the stub sections, then we need
281 to recalculate all the section offsets. This may mean we need to
282 add even more stubs. */
284 /* Delete all the padding statements, they're no longer valid. */
285 hppaelf_delete_padding_statements (stat_ptr);
287 /* Resize the sections. */
288 lang_size_sections (stat_ptr->head, abs_output_section,
289 &stat_ptr->head, 0, (bfd_vma) 0, false);
291 /* Redo special stuff. */
292 ldemul_after_allocation ();
294 /* Do the assignments again. */
295 lang_do_assignments (stat_ptr->head, abs_output_section,
296 (fill_type) 0, (bfd_vma) 0);
300 /* Final emulation specific call. For the PA we use this opportunity
301 to build linker stubs. */
306 /* If generating a relocatable output file, then we don't
307 have to examine the relocs. */
308 if (link_info.relocateable)
311 /* Call into the BFD backend to do the real work. */
312 if (! elf32_hppa_size_stubs (output_bfd,
317 &hppaelf_add_stub_section,
318 &hppaelf_layaout_sections_again))
320 einfo ("%X%P: can not size stub section: %E\n");
324 /* Set the global data pointer. */
325 if (! elf32_hppa_set_gp (output_bfd, &link_info))
327 einfo ("%X%P: can not set gp\n");
331 /* Now build the linker stubs. */
332 if (stub_file->the_bfd->sections != NULL)
334 if (! elf32_hppa_build_stubs (&link_info))
335 einfo ("%X%P: can not build stubs: %E\n");
340 /* Avoid processing the fake stub_file in vercheck, stat_needed and
341 check_needed routines. */
343 static void hppa_for_each_input_file_wrapper
344 PARAMS ((lang_input_statement_type *));
345 static void hppa_lang_for_each_input_file
346 PARAMS ((void (*) (lang_input_statement_type *)));
348 static void (*real_func) PARAMS ((lang_input_statement_type *));
350 static void hppa_for_each_input_file_wrapper (l)
351 lang_input_statement_type *l;
358 hppa_lang_for_each_input_file (func)
359 void (*func) PARAMS ((lang_input_statement_type *));
362 lang_for_each_input_file (&hppa_for_each_input_file_wrapper);
365 #define lang_for_each_input_file hppa_lang_for_each_input_file
369 # Define some shell vars to insert bits of code into the standard elf
370 # parse_args and list_options functions.
372 PARSE_AND_LIST_PROLOGUE='
373 #define OPTION_MULTI_SUBSPACE 301
374 #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1)
377 # The options are repeated below so that no abbreviations are allowed.
378 # Otherwise -s matches stub-group-size
379 PARSE_AND_LIST_LONGOPTS='
380 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
381 { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE },
382 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
383 { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
386 PARSE_AND_LIST_OPTIONS='
388 --multi-subspace Generate import and export stubs to support\n\
389 multiple sub-space shared libraries\n"
392 --stub-group-size=N Maximum size of a group of input sections that can be\n\
393 handled by one stub section. A negative value\n\
394 locates all stubs before their branches (with a\n\
395 group size of -N), while a positive value allows\n\
396 two groups of input sections, one before, and one\n\
397 after each stub section. Values of +/-1 indicate\n\
398 the linker should choose suitable defaults."
402 PARSE_AND_LIST_ARGS_CASES='
403 case OPTION_MULTI_SUBSPACE:
407 case OPTION_STUBGROUP_SIZE:
410 group_size = bfd_scan_vma (optarg, &end, 0);
412 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
417 # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation
419 LDEMUL_AFTER_PARSE=hppaelf_after_parse
420 LDEMUL_FINISH=hppaelf_finish
421 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements