Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
a2b64bed | 2 | # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001 |
41392f03 AM |
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 | |
ffd6e9de | 30 | static void hppaelf_after_parse PARAMS((void)); |
4900fc06 AM |
31 | static void hppaelf_create_output_section_statements PARAMS ((void)); |
32 | static void hppaelf_delete_padding_statements | |
41392f03 AM |
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)); | |
4900fc06 | 37 | static void hppaelf_finish PARAMS ((void)); |
252b5132 RH |
38 | |
39 | ||
4900fc06 AM |
40 | /* Fake input file for stubs. */ |
41 | static lang_input_statement_type *stub_file; | |
252b5132 | 42 | |
3231d22e AM |
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 | |
45 | stubs. */ | |
46 | static int multi_subspace = 0; | |
252b5132 | 47 | |
47d89dba AM |
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; | |
252b5132 | 52 | |
ffd6e9de AM |
53 | /* Stops the linker merging .text sections on a relocatable link, |
54 | and adds millicode library to the list of input files. */ | |
55 | ||
56 | static void | |
57 | hppaelf_after_parse () | |
58 | { | |
59 | if (link_info.relocateable) | |
60 | lang_add_unique (".text"); | |
61 | #if 0 /* enable this once we split millicode stuff from libgcc */ | |
62 | else | |
63 | lang_add_input_file ("milli", | |
64 | lang_input_file_is_l_enum, | |
65 | NULL); | |
66 | #endif | |
67 | } | |
68 | ||
252b5132 | 69 | /* This is called before the input files are opened. We create a new |
4900fc06 | 70 | fake input file to hold the stub sections. */ |
252b5132 RH |
71 | |
72 | static void | |
73 | hppaelf_create_output_section_statements () | |
74 | { | |
75 | stub_file = lang_add_input_file ("linker stubs", | |
76 | lang_input_file_is_fake_enum, | |
77 | NULL); | |
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))) | |
83 | { | |
84 | einfo ("%X%P: can not create BFD %E\n"); | |
85 | return; | |
86 | } | |
87 | ||
252b5132 RH |
88 | ldlang_add_file (stub_file); |
89 | } | |
90 | ||
4900fc06 | 91 | /* Walk all the lang statements splicing out any padding statements from |
252b5132 RH |
92 | the list. */ |
93 | ||
94 | static void | |
4900fc06 AM |
95 | hppaelf_delete_padding_statements (list) |
96 | lang_statement_list_type *list; | |
252b5132 | 97 | { |
4900fc06 AM |
98 | lang_statement_union_type *s; |
99 | lang_statement_union_type **ps; | |
100 | for (ps = &list->head; (s = *ps) != NULL; ps = &s->next) | |
252b5132 RH |
101 | { |
102 | switch (s->header.type) | |
103 | { | |
104 | ||
4900fc06 | 105 | /* We want to recursively walk these sections. */ |
252b5132 | 106 | case lang_constructors_statement_enum: |
4900fc06 | 107 | hppaelf_delete_padding_statements (&constructor_list); |
252b5132 RH |
108 | break; |
109 | ||
110 | case lang_output_section_statement_enum: | |
4900fc06 AM |
111 | hppaelf_delete_padding_statements (&s->output_section_statement.children); |
112 | break; | |
113 | ||
114 | case lang_group_statement_enum: | |
115 | hppaelf_delete_padding_statements (&s->group_statement.children); | |
252b5132 RH |
116 | break; |
117 | ||
252b5132 | 118 | case lang_wild_statement_enum: |
4900fc06 | 119 | hppaelf_delete_padding_statements (&s->wild_statement.children); |
252b5132 RH |
120 | break; |
121 | ||
122 | /* Here's what we are really looking for. Splice these out of | |
123 | the list. */ | |
124 | case lang_padding_statement_enum: | |
4900fc06 AM |
125 | *ps = s->next; |
126 | if (*ps == NULL) | |
127 | list->tail = ps; | |
252b5132 RH |
128 | break; |
129 | ||
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: | |
139 | break; | |
140 | ||
141 | default: | |
142 | abort (); | |
143 | break; | |
144 | } | |
252b5132 RH |
145 | } |
146 | } | |
147 | ||
4900fc06 AM |
148 | |
149 | struct hook_stub_info | |
150 | { | |
151 | lang_statement_list_type add; | |
152 | asection *input_section; | |
153 | }; | |
154 | ||
155 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
156 | ||
41392f03 AM |
157 | static boolean hook_in_stub |
158 | PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); | |
159 | ||
4900fc06 AM |
160 | static boolean |
161 | hook_in_stub (info, lp) | |
162 | struct hook_stub_info *info; | |
163 | lang_statement_union_type **lp; | |
164 | { | |
165 | lang_statement_union_type *l; | |
166 | boolean ret; | |
167 | ||
168 | for (; (l = *lp) != NULL; lp = &l->next) | |
169 | { | |
170 | switch (l->header.type) | |
171 | { | |
172 | case lang_constructors_statement_enum: | |
173 | ret = hook_in_stub (info, &constructor_list.head); | |
174 | if (ret) | |
175 | return ret; | |
176 | break; | |
177 | ||
178 | case lang_output_section_statement_enum: | |
179 | ret = hook_in_stub (info, | |
180 | &l->output_section_statement.children.head); | |
181 | if (ret) | |
182 | return ret; | |
183 | break; | |
184 | ||
185 | case lang_wild_statement_enum: | |
186 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
187 | if (ret) | |
188 | return ret; | |
189 | break; | |
190 | ||
191 | case lang_group_statement_enum: | |
192 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
193 | if (ret) | |
194 | return ret; | |
195 | break; | |
196 | ||
197 | case lang_input_section_enum: | |
198 | if (l->input_section.section == info->input_section) | |
199 | { | |
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; | |
204 | return true; | |
205 | } | |
206 | break; | |
207 | ||
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: | |
218 | break; | |
219 | ||
220 | default: | |
221 | FAIL (); | |
222 | break; | |
223 | } | |
224 | } | |
225 | return false; | |
226 | } | |
227 | ||
41392f03 | 228 | |
4900fc06 AM |
229 | /* Call-back for elf32_hppa_size_stubs. */ |
230 | ||
231 | /* Create a new stub section, and arrange for it to be linked | |
232 | immediately before INPUT_SECTION. */ | |
233 | ||
234 | static asection * | |
25f72752 AM |
235 | hppaelf_add_stub_section (stub_sec_name, input_section) |
236 | const char *stub_sec_name; | |
4900fc06 AM |
237 | asection *input_section; |
238 | { | |
239 | asection *stub_sec; | |
240 | flagword flags; | |
241 | asection *output_section; | |
242 | const char *secname; | |
243 | lang_output_section_statement_type *os; | |
244 | struct hook_stub_info info; | |
245 | ||
25f72752 | 246 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); |
4900fc06 AM |
247 | if (stub_sec == NULL) |
248 | goto err_ret; | |
249 | ||
250 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
3231d22e | 251 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
4900fc06 AM |
252 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) |
253 | goto err_ret; | |
254 | ||
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); | |
258 | ||
259 | info.input_section = input_section; | |
260 | lang_list_init (&info.add); | |
261 | wild_doit (&info.add, stub_sec, os, stub_file); | |
262 | ||
263 | if (info.add.head == NULL) | |
264 | goto err_ret; | |
265 | ||
266 | if (hook_in_stub (&info, &os->children.head)) | |
267 | return stub_sec; | |
268 | ||
269 | err_ret: | |
270 | einfo ("%X%P: can not make stub section: %E\n"); | |
271 | return NULL; | |
272 | } | |
273 | ||
41392f03 | 274 | |
4900fc06 AM |
275 | /* Another call-back for elf32_hppa_size_stubs. */ |
276 | ||
277 | static void | |
278 | hppaelf_layaout_sections_again () | |
279 | { | |
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. */ | |
283 | ||
284 | /* Delete all the padding statements, they're no longer valid. */ | |
285 | hppaelf_delete_padding_statements (stat_ptr); | |
286 | ||
287 | /* Resize the sections. */ | |
288 | lang_size_sections (stat_ptr->head, abs_output_section, | |
289 | &stat_ptr->head, 0, (bfd_vma) 0, false); | |
290 | ||
291 | /* Redo special stuff. */ | |
292 | ldemul_after_allocation (); | |
293 | ||
294 | /* Do the assignments again. */ | |
295 | lang_do_assignments (stat_ptr->head, abs_output_section, | |
296 | (fill_type) 0, (bfd_vma) 0); | |
297 | } | |
298 | ||
299 | ||
252b5132 RH |
300 | /* Final emulation specific call. For the PA we use this opportunity |
301 | to build linker stubs. */ | |
302 | ||
303 | static void | |
304 | hppaelf_finish () | |
305 | { | |
ffd6e9de | 306 | /* If generating a relocatable output file, then we don't |
4900fc06 AM |
307 | have to examine the relocs. */ |
308 | if (link_info.relocateable) | |
309 | return; | |
310 | ||
252b5132 | 311 | /* Call into the BFD backend to do the real work. */ |
25f72752 AM |
312 | if (! elf32_hppa_size_stubs (output_bfd, |
313 | stub_file->the_bfd, | |
41392f03 | 314 | &link_info, |
25f72752 | 315 | multi_subspace, |
47d89dba | 316 | group_size, |
41392f03 AM |
317 | &hppaelf_add_stub_section, |
318 | &hppaelf_layaout_sections_again)) | |
252b5132 RH |
319 | { |
320 | einfo ("%X%P: can not size stub section: %E\n"); | |
321 | return; | |
322 | } | |
4900fc06 | 323 | |
3231d22e AM |
324 | /* Set the global data pointer. */ |
325 | if (! elf32_hppa_set_gp (output_bfd, &link_info)) | |
326 | { | |
327 | einfo ("%X%P: can not set gp\n"); | |
328 | return; | |
329 | } | |
330 | ||
4900fc06 AM |
331 | /* Now build the linker stubs. */ |
332 | if (stub_file->the_bfd->sections != NULL) | |
252b5132 | 333 | { |
3231d22e | 334 | if (! elf32_hppa_build_stubs (&link_info)) |
4900fc06 AM |
335 | einfo ("%X%P: can not build stubs: %E\n"); |
336 | } | |
337 | } | |
338 | ||
3231d22e AM |
339 | |
340 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
341 | check_needed routines. */ | |
342 | ||
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 *))); | |
347 | ||
348 | static void (*real_func) PARAMS ((lang_input_statement_type *)); | |
349 | ||
350 | static void hppa_for_each_input_file_wrapper (l) | |
351 | lang_input_statement_type *l; | |
352 | { | |
353 | if (l != stub_file) | |
354 | (*real_func) (l); | |
355 | } | |
356 | ||
357 | static void | |
358 | hppa_lang_for_each_input_file (func) | |
359 | void (*func) PARAMS ((lang_input_statement_type *)); | |
360 | { | |
361 | real_func = func; | |
362 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
363 | } | |
364 | ||
365 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
366 | ||
252b5132 RH |
367 | EOF |
368 | ||
3231d22e AM |
369 | # Define some shell vars to insert bits of code into the standard elf |
370 | # parse_args and list_options functions. | |
371 | # | |
372 | PARSE_AND_LIST_PROLOGUE=' | |
373 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 374 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
375 | ' |
376 | ||
47d89dba AM |
377 | # The options are repeated below so that no abbreviations are allowed. |
378 | # Otherwise -s matches stub-group-size | |
3231d22e | 379 | PARSE_AND_LIST_LONGOPTS=' |
47d89dba AM |
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 }, | |
3231d22e AM |
384 | ' |
385 | ||
386 | PARSE_AND_LIST_OPTIONS=' | |
387 | fprintf (file, _("\ | |
47d89dba AM |
388 | --multi-subspace Generate import and export stubs to support\n\ |
389 | multiple sub-space shared libraries\n" | |
390 | )); | |
391 | fprintf (file, _("\ | |
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." | |
3231d22e AM |
399 | )); |
400 | ' | |
401 | ||
402 | PARSE_AND_LIST_ARGS_CASES=' | |
403 | case OPTION_MULTI_SUBSPACE: | |
404 | multi_subspace = 1; | |
405 | break; | |
47d89dba AM |
406 | |
407 | case OPTION_STUBGROUP_SIZE: | |
408 | { | |
409 | const char *end; | |
410 | group_size = bfd_scan_vma (optarg, &end, 0); | |
411 | if (*end) | |
412 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
413 | } | |
414 | break; | |
3231d22e AM |
415 | ' |
416 | ||
417 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 418 | # |
ffd6e9de | 419 | LDEMUL_AFTER_PARSE=hppaelf_after_parse |
41392f03 AM |
420 | LDEMUL_FINISH=hppaelf_finish |
421 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |