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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 | |
252b5132 RH |
47 | |
48 | /* This is called before the input files are opened. We create a new | |
4900fc06 | 49 | fake input file to hold the stub sections. */ |
252b5132 RH |
50 | |
51 | static void | |
52 | hppaelf_create_output_section_statements () | |
53 | { | |
54 | stub_file = lang_add_input_file ("linker stubs", | |
55 | lang_input_file_is_fake_enum, | |
56 | NULL); | |
57 | stub_file->the_bfd = bfd_create ("linker stubs", output_bfd); | |
58 | if (stub_file->the_bfd == NULL | |
59 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
60 | bfd_get_arch (output_bfd), | |
61 | bfd_get_mach (output_bfd))) | |
62 | { | |
63 | einfo ("%X%P: can not create BFD %E\n"); | |
64 | return; | |
65 | } | |
66 | ||
252b5132 RH |
67 | ldlang_add_file (stub_file); |
68 | } | |
69 | ||
4900fc06 | 70 | /* Walk all the lang statements splicing out any padding statements from |
252b5132 RH |
71 | the list. */ |
72 | ||
73 | static void | |
4900fc06 AM |
74 | hppaelf_delete_padding_statements (list) |
75 | lang_statement_list_type *list; | |
252b5132 | 76 | { |
4900fc06 AM |
77 | lang_statement_union_type *s; |
78 | lang_statement_union_type **ps; | |
79 | for (ps = &list->head; (s = *ps) != NULL; ps = &s->next) | |
252b5132 RH |
80 | { |
81 | switch (s->header.type) | |
82 | { | |
83 | ||
4900fc06 | 84 | /* We want to recursively walk these sections. */ |
252b5132 | 85 | case lang_constructors_statement_enum: |
4900fc06 | 86 | hppaelf_delete_padding_statements (&constructor_list); |
252b5132 RH |
87 | break; |
88 | ||
89 | case lang_output_section_statement_enum: | |
4900fc06 AM |
90 | hppaelf_delete_padding_statements (&s->output_section_statement.children); |
91 | break; | |
92 | ||
93 | case lang_group_statement_enum: | |
94 | hppaelf_delete_padding_statements (&s->group_statement.children); | |
252b5132 RH |
95 | break; |
96 | ||
252b5132 | 97 | case lang_wild_statement_enum: |
4900fc06 | 98 | hppaelf_delete_padding_statements (&s->wild_statement.children); |
252b5132 RH |
99 | break; |
100 | ||
101 | /* Here's what we are really looking for. Splice these out of | |
102 | the list. */ | |
103 | case lang_padding_statement_enum: | |
4900fc06 AM |
104 | *ps = s->next; |
105 | if (*ps == NULL) | |
106 | list->tail = ps; | |
252b5132 RH |
107 | break; |
108 | ||
109 | /* We don't care about these cases. */ | |
110 | case lang_data_statement_enum: | |
111 | case lang_object_symbols_statement_enum: | |
112 | case lang_output_statement_enum: | |
113 | case lang_target_statement_enum: | |
114 | case lang_input_section_enum: | |
115 | case lang_input_statement_enum: | |
116 | case lang_assignment_statement_enum: | |
117 | case lang_address_statement_enum: | |
118 | break; | |
119 | ||
120 | default: | |
121 | abort (); | |
122 | break; | |
123 | } | |
252b5132 RH |
124 | } |
125 | } | |
126 | ||
4900fc06 AM |
127 | |
128 | struct hook_stub_info | |
129 | { | |
130 | lang_statement_list_type add; | |
131 | asection *input_section; | |
132 | }; | |
133 | ||
134 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
135 | ||
41392f03 AM |
136 | static boolean hook_in_stub |
137 | PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); | |
138 | ||
4900fc06 AM |
139 | static boolean |
140 | hook_in_stub (info, lp) | |
141 | struct hook_stub_info *info; | |
142 | lang_statement_union_type **lp; | |
143 | { | |
144 | lang_statement_union_type *l; | |
145 | boolean ret; | |
146 | ||
147 | for (; (l = *lp) != NULL; lp = &l->next) | |
148 | { | |
149 | switch (l->header.type) | |
150 | { | |
151 | case lang_constructors_statement_enum: | |
152 | ret = hook_in_stub (info, &constructor_list.head); | |
153 | if (ret) | |
154 | return ret; | |
155 | break; | |
156 | ||
157 | case lang_output_section_statement_enum: | |
158 | ret = hook_in_stub (info, | |
159 | &l->output_section_statement.children.head); | |
160 | if (ret) | |
161 | return ret; | |
162 | break; | |
163 | ||
164 | case lang_wild_statement_enum: | |
165 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
166 | if (ret) | |
167 | return ret; | |
168 | break; | |
169 | ||
170 | case lang_group_statement_enum: | |
171 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
172 | if (ret) | |
173 | return ret; | |
174 | break; | |
175 | ||
176 | case lang_input_section_enum: | |
177 | if (l->input_section.section == info->input_section) | |
178 | { | |
179 | /* We've found our section. Insert the stub immediately | |
180 | before its associated input section. */ | |
181 | *lp = info->add.head; | |
182 | *(info->add.tail) = l; | |
183 | return true; | |
184 | } | |
185 | break; | |
186 | ||
187 | case lang_data_statement_enum: | |
188 | case lang_reloc_statement_enum: | |
189 | case lang_object_symbols_statement_enum: | |
190 | case lang_output_statement_enum: | |
191 | case lang_target_statement_enum: | |
192 | case lang_input_statement_enum: | |
193 | case lang_assignment_statement_enum: | |
194 | case lang_padding_statement_enum: | |
195 | case lang_address_statement_enum: | |
196 | case lang_fill_statement_enum: | |
197 | break; | |
198 | ||
199 | default: | |
200 | FAIL (); | |
201 | break; | |
202 | } | |
203 | } | |
204 | return false; | |
205 | } | |
206 | ||
41392f03 | 207 | |
4900fc06 AM |
208 | /* Call-back for elf32_hppa_size_stubs. */ |
209 | ||
210 | /* Create a new stub section, and arrange for it to be linked | |
211 | immediately before INPUT_SECTION. */ | |
212 | ||
213 | static asection * | |
25f72752 AM |
214 | hppaelf_add_stub_section (stub_sec_name, input_section) |
215 | const char *stub_sec_name; | |
4900fc06 AM |
216 | asection *input_section; |
217 | { | |
218 | asection *stub_sec; | |
219 | flagword flags; | |
220 | asection *output_section; | |
221 | const char *secname; | |
222 | lang_output_section_statement_type *os; | |
223 | struct hook_stub_info info; | |
224 | ||
25f72752 | 225 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); |
4900fc06 AM |
226 | if (stub_sec == NULL) |
227 | goto err_ret; | |
228 | ||
229 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
3231d22e | 230 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
4900fc06 AM |
231 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) |
232 | goto err_ret; | |
233 | ||
234 | output_section = input_section->output_section; | |
235 | secname = bfd_get_section_name (output_section->owner, output_section); | |
236 | os = lang_output_section_find (secname); | |
237 | ||
238 | info.input_section = input_section; | |
239 | lang_list_init (&info.add); | |
240 | wild_doit (&info.add, stub_sec, os, stub_file); | |
241 | ||
242 | if (info.add.head == NULL) | |
243 | goto err_ret; | |
244 | ||
245 | if (hook_in_stub (&info, &os->children.head)) | |
246 | return stub_sec; | |
247 | ||
248 | err_ret: | |
249 | einfo ("%X%P: can not make stub section: %E\n"); | |
250 | return NULL; | |
251 | } | |
252 | ||
41392f03 | 253 | |
4900fc06 AM |
254 | /* Another call-back for elf32_hppa_size_stubs. */ |
255 | ||
256 | static void | |
257 | hppaelf_layaout_sections_again () | |
258 | { | |
259 | /* If we have changed sizes of the stub sections, then we need | |
260 | to recalculate all the section offsets. This may mean we need to | |
261 | add even more stubs. */ | |
262 | ||
263 | /* Delete all the padding statements, they're no longer valid. */ | |
264 | hppaelf_delete_padding_statements (stat_ptr); | |
265 | ||
266 | /* Resize the sections. */ | |
267 | lang_size_sections (stat_ptr->head, abs_output_section, | |
268 | &stat_ptr->head, 0, (bfd_vma) 0, false); | |
269 | ||
270 | /* Redo special stuff. */ | |
271 | ldemul_after_allocation (); | |
272 | ||
273 | /* Do the assignments again. */ | |
274 | lang_do_assignments (stat_ptr->head, abs_output_section, | |
275 | (fill_type) 0, (bfd_vma) 0); | |
276 | } | |
277 | ||
278 | ||
252b5132 RH |
279 | /* Final emulation specific call. For the PA we use this opportunity |
280 | to build linker stubs. */ | |
281 | ||
282 | static void | |
283 | hppaelf_finish () | |
284 | { | |
4900fc06 AM |
285 | /* If generating a relocateable output file, then we don't |
286 | have to examine the relocs. */ | |
287 | if (link_info.relocateable) | |
288 | return; | |
289 | ||
252b5132 | 290 | /* Call into the BFD backend to do the real work. */ |
25f72752 AM |
291 | if (! elf32_hppa_size_stubs (output_bfd, |
292 | stub_file->the_bfd, | |
41392f03 | 293 | &link_info, |
25f72752 | 294 | multi_subspace, |
41392f03 AM |
295 | &hppaelf_add_stub_section, |
296 | &hppaelf_layaout_sections_again)) | |
252b5132 RH |
297 | { |
298 | einfo ("%X%P: can not size stub section: %E\n"); | |
299 | return; | |
300 | } | |
4900fc06 | 301 | |
3231d22e AM |
302 | /* Set the global data pointer. */ |
303 | if (! elf32_hppa_set_gp (output_bfd, &link_info)) | |
304 | { | |
305 | einfo ("%X%P: can not set gp\n"); | |
306 | return; | |
307 | } | |
308 | ||
4900fc06 AM |
309 | /* Now build the linker stubs. */ |
310 | if (stub_file->the_bfd->sections != NULL) | |
252b5132 | 311 | { |
3231d22e | 312 | if (! elf32_hppa_build_stubs (&link_info)) |
4900fc06 AM |
313 | einfo ("%X%P: can not build stubs: %E\n"); |
314 | } | |
315 | } | |
316 | ||
3231d22e AM |
317 | |
318 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
319 | check_needed routines. */ | |
320 | ||
321 | static void hppa_for_each_input_file_wrapper | |
322 | PARAMS ((lang_input_statement_type *)); | |
323 | static void hppa_lang_for_each_input_file | |
324 | PARAMS ((void (*) (lang_input_statement_type *))); | |
325 | ||
326 | static void (*real_func) PARAMS ((lang_input_statement_type *)); | |
327 | ||
328 | static void hppa_for_each_input_file_wrapper (l) | |
329 | lang_input_statement_type *l; | |
330 | { | |
331 | if (l != stub_file) | |
332 | (*real_func) (l); | |
333 | } | |
334 | ||
335 | static void | |
336 | hppa_lang_for_each_input_file (func) | |
337 | void (*func) PARAMS ((lang_input_statement_type *)); | |
338 | { | |
339 | real_func = func; | |
340 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
341 | } | |
342 | ||
343 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
344 | ||
252b5132 RH |
345 | EOF |
346 | ||
3231d22e AM |
347 | # Define some shell vars to insert bits of code into the standard elf |
348 | # parse_args and list_options functions. | |
349 | # | |
350 | PARSE_AND_LIST_PROLOGUE=' | |
351 | #define OPTION_MULTI_SUBSPACE 301 | |
352 | ' | |
353 | ||
354 | PARSE_AND_LIST_LONGOPTS=' | |
355 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE}, | |
356 | ' | |
357 | ||
358 | PARSE_AND_LIST_OPTIONS=' | |
359 | fprintf (file, _("\ | |
360 | --multi-subspace Generate import and export stubs to support\n\ | |
361 | multiple sub-space shared libraries\n" | |
362 | )); | |
363 | ' | |
364 | ||
365 | PARSE_AND_LIST_ARGS_CASES=' | |
366 | case OPTION_MULTI_SUBSPACE: | |
367 | multi_subspace = 1; | |
368 | break; | |
369 | ' | |
370 | ||
371 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 372 | # |
41392f03 AM |
373 | LDEMUL_FINISH=hppaelf_finish |
374 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |