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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
41392f03 AM |
2 | # Copyright (C) 1991, 93, 94, 95, 97, 99, 2000 |
3 | # Free Software Foundation, Inc. | |
4 | # | |
5 | # This file is part of GLD, the Gnu Linker. | |
6 | # | |
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. | |
11 | # | |
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. | |
16 | # | |
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. | |
20 | # | |
21 | ||
22 | # This file is sourced from elf32.em, and defines extra hppa-elf | |
23 | # specific routines. | |
24 | # | |
25 | cat >>e${EMULATION_NAME}.c <<EOF | |
26 | ||
252b5132 | 27 | #include "ldctor.h" |
4900fc06 | 28 | #include "elf32-hppa.h" |
252b5132 | 29 | |
4900fc06 AM |
30 | static void hppaelf_create_output_section_statements PARAMS ((void)); |
31 | static void hppaelf_delete_padding_statements | |
41392f03 AM |
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)); | |
4900fc06 | 36 | static void hppaelf_finish PARAMS ((void)); |
252b5132 RH |
37 | |
38 | ||
4900fc06 AM |
39 | /* Fake input file for stubs. */ |
40 | static lang_input_statement_type *stub_file; | |
252b5132 | 41 | |
3231d22e AM |
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 | |
44 | stubs. */ | |
45 | static int multi_subspace = 0; | |
252b5132 | 46 | |
47d89dba AM |
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; | |
252b5132 RH |
51 | |
52 | /* This is called before the input files are opened. We create a new | |
4900fc06 | 53 | fake input file to hold the stub sections. */ |
252b5132 RH |
54 | |
55 | static void | |
56 | hppaelf_create_output_section_statements () | |
57 | { | |
58 | stub_file = lang_add_input_file ("linker stubs", | |
59 | lang_input_file_is_fake_enum, | |
60 | NULL); | |
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))) | |
66 | { | |
67 | einfo ("%X%P: can not create BFD %E\n"); | |
68 | return; | |
69 | } | |
70 | ||
252b5132 RH |
71 | ldlang_add_file (stub_file); |
72 | } | |
73 | ||
4900fc06 | 74 | /* Walk all the lang statements splicing out any padding statements from |
252b5132 RH |
75 | the list. */ |
76 | ||
77 | static void | |
4900fc06 AM |
78 | hppaelf_delete_padding_statements (list) |
79 | lang_statement_list_type *list; | |
252b5132 | 80 | { |
4900fc06 AM |
81 | lang_statement_union_type *s; |
82 | lang_statement_union_type **ps; | |
83 | for (ps = &list->head; (s = *ps) != NULL; ps = &s->next) | |
252b5132 RH |
84 | { |
85 | switch (s->header.type) | |
86 | { | |
87 | ||
4900fc06 | 88 | /* We want to recursively walk these sections. */ |
252b5132 | 89 | case lang_constructors_statement_enum: |
4900fc06 | 90 | hppaelf_delete_padding_statements (&constructor_list); |
252b5132 RH |
91 | break; |
92 | ||
93 | case lang_output_section_statement_enum: | |
4900fc06 AM |
94 | hppaelf_delete_padding_statements (&s->output_section_statement.children); |
95 | break; | |
96 | ||
97 | case lang_group_statement_enum: | |
98 | hppaelf_delete_padding_statements (&s->group_statement.children); | |
252b5132 RH |
99 | break; |
100 | ||
252b5132 | 101 | case lang_wild_statement_enum: |
4900fc06 | 102 | hppaelf_delete_padding_statements (&s->wild_statement.children); |
252b5132 RH |
103 | break; |
104 | ||
105 | /* Here's what we are really looking for. Splice these out of | |
106 | the list. */ | |
107 | case lang_padding_statement_enum: | |
4900fc06 AM |
108 | *ps = s->next; |
109 | if (*ps == NULL) | |
110 | list->tail = ps; | |
252b5132 RH |
111 | break; |
112 | ||
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: | |
122 | break; | |
123 | ||
124 | default: | |
125 | abort (); | |
126 | break; | |
127 | } | |
252b5132 RH |
128 | } |
129 | } | |
130 | ||
4900fc06 AM |
131 | |
132 | struct hook_stub_info | |
133 | { | |
134 | lang_statement_list_type add; | |
135 | asection *input_section; | |
136 | }; | |
137 | ||
138 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
139 | ||
41392f03 AM |
140 | static boolean hook_in_stub |
141 | PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); | |
142 | ||
4900fc06 AM |
143 | static boolean |
144 | hook_in_stub (info, lp) | |
145 | struct hook_stub_info *info; | |
146 | lang_statement_union_type **lp; | |
147 | { | |
148 | lang_statement_union_type *l; | |
149 | boolean ret; | |
150 | ||
151 | for (; (l = *lp) != NULL; lp = &l->next) | |
152 | { | |
153 | switch (l->header.type) | |
154 | { | |
155 | case lang_constructors_statement_enum: | |
156 | ret = hook_in_stub (info, &constructor_list.head); | |
157 | if (ret) | |
158 | return ret; | |
159 | break; | |
160 | ||
161 | case lang_output_section_statement_enum: | |
162 | ret = hook_in_stub (info, | |
163 | &l->output_section_statement.children.head); | |
164 | if (ret) | |
165 | return ret; | |
166 | break; | |
167 | ||
168 | case lang_wild_statement_enum: | |
169 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
170 | if (ret) | |
171 | return ret; | |
172 | break; | |
173 | ||
174 | case lang_group_statement_enum: | |
175 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
176 | if (ret) | |
177 | return ret; | |
178 | break; | |
179 | ||
180 | case lang_input_section_enum: | |
181 | if (l->input_section.section == info->input_section) | |
182 | { | |
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; | |
187 | return true; | |
188 | } | |
189 | break; | |
190 | ||
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: | |
201 | break; | |
202 | ||
203 | default: | |
204 | FAIL (); | |
205 | break; | |
206 | } | |
207 | } | |
208 | return false; | |
209 | } | |
210 | ||
41392f03 | 211 | |
4900fc06 AM |
212 | /* Call-back for elf32_hppa_size_stubs. */ |
213 | ||
214 | /* Create a new stub section, and arrange for it to be linked | |
215 | immediately before INPUT_SECTION. */ | |
216 | ||
217 | static asection * | |
25f72752 AM |
218 | hppaelf_add_stub_section (stub_sec_name, input_section) |
219 | const char *stub_sec_name; | |
4900fc06 AM |
220 | asection *input_section; |
221 | { | |
222 | asection *stub_sec; | |
223 | flagword flags; | |
224 | asection *output_section; | |
225 | const char *secname; | |
226 | lang_output_section_statement_type *os; | |
227 | struct hook_stub_info info; | |
228 | ||
25f72752 | 229 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); |
4900fc06 AM |
230 | if (stub_sec == NULL) |
231 | goto err_ret; | |
232 | ||
233 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
3231d22e | 234 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
4900fc06 AM |
235 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) |
236 | goto err_ret; | |
237 | ||
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); | |
241 | ||
242 | info.input_section = input_section; | |
243 | lang_list_init (&info.add); | |
244 | wild_doit (&info.add, stub_sec, os, stub_file); | |
245 | ||
246 | if (info.add.head == NULL) | |
247 | goto err_ret; | |
248 | ||
249 | if (hook_in_stub (&info, &os->children.head)) | |
250 | return stub_sec; | |
251 | ||
252 | err_ret: | |
253 | einfo ("%X%P: can not make stub section: %E\n"); | |
254 | return NULL; | |
255 | } | |
256 | ||
41392f03 | 257 | |
4900fc06 AM |
258 | /* Another call-back for elf32_hppa_size_stubs. */ |
259 | ||
260 | static void | |
261 | hppaelf_layaout_sections_again () | |
262 | { | |
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. */ | |
266 | ||
267 | /* Delete all the padding statements, they're no longer valid. */ | |
268 | hppaelf_delete_padding_statements (stat_ptr); | |
269 | ||
270 | /* Resize the sections. */ | |
271 | lang_size_sections (stat_ptr->head, abs_output_section, | |
272 | &stat_ptr->head, 0, (bfd_vma) 0, false); | |
273 | ||
274 | /* Redo special stuff. */ | |
275 | ldemul_after_allocation (); | |
276 | ||
277 | /* Do the assignments again. */ | |
278 | lang_do_assignments (stat_ptr->head, abs_output_section, | |
279 | (fill_type) 0, (bfd_vma) 0); | |
280 | } | |
281 | ||
282 | ||
252b5132 RH |
283 | /* Final emulation specific call. For the PA we use this opportunity |
284 | to build linker stubs. */ | |
285 | ||
286 | static void | |
287 | hppaelf_finish () | |
288 | { | |
4900fc06 AM |
289 | /* If generating a relocateable output file, then we don't |
290 | have to examine the relocs. */ | |
291 | if (link_info.relocateable) | |
292 | return; | |
293 | ||
252b5132 | 294 | /* Call into the BFD backend to do the real work. */ |
25f72752 AM |
295 | if (! elf32_hppa_size_stubs (output_bfd, |
296 | stub_file->the_bfd, | |
41392f03 | 297 | &link_info, |
25f72752 | 298 | multi_subspace, |
47d89dba | 299 | group_size, |
41392f03 AM |
300 | &hppaelf_add_stub_section, |
301 | &hppaelf_layaout_sections_again)) | |
252b5132 RH |
302 | { |
303 | einfo ("%X%P: can not size stub section: %E\n"); | |
304 | return; | |
305 | } | |
4900fc06 | 306 | |
3231d22e AM |
307 | /* Set the global data pointer. */ |
308 | if (! elf32_hppa_set_gp (output_bfd, &link_info)) | |
309 | { | |
310 | einfo ("%X%P: can not set gp\n"); | |
311 | return; | |
312 | } | |
313 | ||
4900fc06 AM |
314 | /* Now build the linker stubs. */ |
315 | if (stub_file->the_bfd->sections != NULL) | |
252b5132 | 316 | { |
3231d22e | 317 | if (! elf32_hppa_build_stubs (&link_info)) |
4900fc06 AM |
318 | einfo ("%X%P: can not build stubs: %E\n"); |
319 | } | |
320 | } | |
321 | ||
3231d22e AM |
322 | |
323 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
324 | check_needed routines. */ | |
325 | ||
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 *))); | |
330 | ||
331 | static void (*real_func) PARAMS ((lang_input_statement_type *)); | |
332 | ||
333 | static void hppa_for_each_input_file_wrapper (l) | |
334 | lang_input_statement_type *l; | |
335 | { | |
336 | if (l != stub_file) | |
337 | (*real_func) (l); | |
338 | } | |
339 | ||
340 | static void | |
341 | hppa_lang_for_each_input_file (func) | |
342 | void (*func) PARAMS ((lang_input_statement_type *)); | |
343 | { | |
344 | real_func = func; | |
345 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
346 | } | |
347 | ||
348 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
349 | ||
252b5132 RH |
350 | EOF |
351 | ||
3231d22e AM |
352 | # Define some shell vars to insert bits of code into the standard elf |
353 | # parse_args and list_options functions. | |
354 | # | |
355 | PARSE_AND_LIST_PROLOGUE=' | |
356 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 357 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
358 | ' |
359 | ||
47d89dba AM |
360 | # The options are repeated below so that no abbreviations are allowed. |
361 | # Otherwise -s matches stub-group-size | |
3231d22e | 362 | PARSE_AND_LIST_LONGOPTS=' |
47d89dba AM |
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 }, | |
3231d22e AM |
367 | ' |
368 | ||
369 | PARSE_AND_LIST_OPTIONS=' | |
370 | fprintf (file, _("\ | |
47d89dba AM |
371 | --multi-subspace Generate import and export stubs to support\n\ |
372 | multiple sub-space shared libraries\n" | |
373 | )); | |
374 | fprintf (file, _("\ | |
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." | |
3231d22e AM |
382 | )); |
383 | ' | |
384 | ||
385 | PARSE_AND_LIST_ARGS_CASES=' | |
386 | case OPTION_MULTI_SUBSPACE: | |
387 | multi_subspace = 1; | |
388 | break; | |
47d89dba AM |
389 | |
390 | case OPTION_STUBGROUP_SIZE: | |
391 | { | |
392 | const char *end; | |
393 | group_size = bfd_scan_vma (optarg, &end, 0); | |
394 | if (*end) | |
395 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
396 | } | |
397 | break; | |
3231d22e AM |
398 | ' |
399 | ||
400 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 401 | # |
41392f03 AM |
402 | LDEMUL_FINISH=hppaelf_finish |
403 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |