Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
aef6203b | 2 | # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003, 2004, |
f96b4a7b | 3 | # 2005, 2007 Free Software Foundation, Inc. |
41392f03 | 4 | # |
f96b4a7b | 5 | # This file is part of the GNU Binutils. |
41392f03 AM |
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 | |
f96b4a7b | 9 | # the Free Software Foundation; either version 3 of the License, or |
41392f03 AM |
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 | |
f96b4a7b NC |
19 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | # MA 02110-1301, USA. | |
41392f03 AM |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em, and defines extra hppa-elf | |
24 | # specific routines. | |
25 | # | |
26 | cat >>e${EMULATION_NAME}.c <<EOF | |
27 | ||
252b5132 | 28 | #include "ldctor.h" |
4900fc06 | 29 | #include "elf32-hppa.h" |
252b5132 | 30 | |
252b5132 | 31 | |
4900fc06 AM |
32 | /* Fake input file for stubs. */ |
33 | static lang_input_statement_type *stub_file; | |
252b5132 | 34 | |
3231d22e AM |
35 | /* Type of import/export stubs to build. For a single sub-space model, |
36 | we can build smaller import stubs and there is no need for export | |
37 | stubs. */ | |
38 | static int multi_subspace = 0; | |
252b5132 | 39 | |
deb04cdb AM |
40 | /* Whether we need to call hppa_layout_sections_again. */ |
41 | static int need_laying_out = 0; | |
42 | ||
47d89dba AM |
43 | /* Maximum size of a group of input sections that can be handled by |
44 | one stub section. A value of +/-1 indicates the bfd back-end | |
45 | should use a suitable default size. */ | |
cfbd8dfa | 46 | static bfd_signed_vma group_size = 1; |
252b5132 | 47 | |
ffd6e9de AM |
48 | /* Stops the linker merging .text sections on a relocatable link, |
49 | and adds millicode library to the list of input files. */ | |
50 | ||
51 | static void | |
0c7a8e5a | 52 | hppaelf_after_parse (void) |
ffd6e9de | 53 | { |
1049f94e | 54 | if (link_info.relocatable) |
ffd6e9de | 55 | lang_add_unique (".text"); |
7a64f7b8 BE |
56 | |
57 | /* Enable this once we split millicode stuff from libgcc: | |
58 | lang_add_input_file ("milli", | |
59 | lang_input_file_is_l_enum, | |
60 | NULL); | |
61 | */ | |
ffd6e9de AM |
62 | } |
63 | ||
252b5132 | 64 | /* This is called before the input files are opened. We create a new |
4900fc06 | 65 | fake input file to hold the stub sections. */ |
252b5132 RH |
66 | |
67 | static void | |
0c7a8e5a | 68 | hppaelf_create_output_section_statements (void) |
252b5132 | 69 | { |
fd574c46 | 70 | extern const bfd_target bfd_elf32_hppa_linux_vec; |
9c183183 | 71 | extern const bfd_target bfd_elf32_hppa_nbsd_vec; |
fd574c46 AM |
72 | extern const bfd_target bfd_elf32_hppa_vec; |
73 | ||
74 | if (link_info.hash->creator != &bfd_elf32_hppa_linux_vec | |
9c183183 | 75 | && link_info.hash->creator != &bfd_elf32_hppa_nbsd_vec |
fd574c46 AM |
76 | && link_info.hash->creator != &bfd_elf32_hppa_vec) |
77 | return; | |
78 | ||
252b5132 RH |
79 | stub_file = lang_add_input_file ("linker stubs", |
80 | lang_input_file_is_fake_enum, | |
81 | NULL); | |
82 | stub_file->the_bfd = bfd_create ("linker stubs", output_bfd); | |
83 | if (stub_file->the_bfd == NULL | |
84 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
85 | bfd_get_arch (output_bfd), | |
86 | bfd_get_mach (output_bfd))) | |
87 | { | |
88 | einfo ("%X%P: can not create BFD %E\n"); | |
89 | return; | |
90 | } | |
91 | ||
d457dcf6 | 92 | stub_file->the_bfd->flags |= BFD_LINKER_CREATED; |
252b5132 RH |
93 | ldlang_add_file (stub_file); |
94 | } | |
95 | ||
4900fc06 AM |
96 | |
97 | struct hook_stub_info | |
98 | { | |
99 | lang_statement_list_type add; | |
100 | asection *input_section; | |
101 | }; | |
102 | ||
103 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
104 | ||
b34976b6 | 105 | static bfd_boolean |
0c7a8e5a | 106 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) |
4900fc06 AM |
107 | { |
108 | lang_statement_union_type *l; | |
b34976b6 | 109 | bfd_boolean ret; |
4900fc06 | 110 | |
bba1a0c0 | 111 | for (; (l = *lp) != NULL; lp = &l->header.next) |
4900fc06 AM |
112 | { |
113 | switch (l->header.type) | |
114 | { | |
115 | case lang_constructors_statement_enum: | |
116 | ret = hook_in_stub (info, &constructor_list.head); | |
117 | if (ret) | |
118 | return ret; | |
119 | break; | |
120 | ||
121 | case lang_output_section_statement_enum: | |
122 | ret = hook_in_stub (info, | |
123 | &l->output_section_statement.children.head); | |
124 | if (ret) | |
125 | return ret; | |
126 | break; | |
127 | ||
128 | case lang_wild_statement_enum: | |
129 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
130 | if (ret) | |
131 | return ret; | |
132 | break; | |
133 | ||
134 | case lang_group_statement_enum: | |
135 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
136 | if (ret) | |
137 | return ret; | |
138 | break; | |
139 | ||
140 | case lang_input_section_enum: | |
141 | if (l->input_section.section == info->input_section) | |
142 | { | |
143 | /* We've found our section. Insert the stub immediately | |
144 | before its associated input section. */ | |
145 | *lp = info->add.head; | |
146 | *(info->add.tail) = l; | |
b34976b6 | 147 | return TRUE; |
4900fc06 AM |
148 | } |
149 | break; | |
150 | ||
151 | case lang_data_statement_enum: | |
152 | case lang_reloc_statement_enum: | |
153 | case lang_object_symbols_statement_enum: | |
154 | case lang_output_statement_enum: | |
155 | case lang_target_statement_enum: | |
156 | case lang_input_statement_enum: | |
157 | case lang_assignment_statement_enum: | |
158 | case lang_padding_statement_enum: | |
159 | case lang_address_statement_enum: | |
160 | case lang_fill_statement_enum: | |
161 | break; | |
162 | ||
163 | default: | |
164 | FAIL (); | |
165 | break; | |
166 | } | |
167 | } | |
b34976b6 | 168 | return FALSE; |
4900fc06 AM |
169 | } |
170 | ||
41392f03 | 171 | |
4900fc06 AM |
172 | /* Call-back for elf32_hppa_size_stubs. */ |
173 | ||
174 | /* Create a new stub section, and arrange for it to be linked | |
175 | immediately before INPUT_SECTION. */ | |
176 | ||
177 | static asection * | |
0c7a8e5a | 178 | hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section) |
4900fc06 AM |
179 | { |
180 | asection *stub_sec; | |
181 | flagword flags; | |
182 | asection *output_section; | |
183 | const char *secname; | |
184 | lang_output_section_statement_type *os; | |
185 | struct hook_stub_info info; | |
186 | ||
25f72752 | 187 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); |
4900fc06 AM |
188 | if (stub_sec == NULL) |
189 | goto err_ret; | |
190 | ||
191 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
3231d22e | 192 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
4900fc06 AM |
193 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) |
194 | goto err_ret; | |
195 | ||
196 | output_section = input_section->output_section; | |
197 | secname = bfd_get_section_name (output_section->owner, output_section); | |
198 | os = lang_output_section_find (secname); | |
199 | ||
200 | info.input_section = input_section; | |
201 | lang_list_init (&info.add); | |
7b986e99 | 202 | lang_add_section (&info.add, stub_sec, os); |
4900fc06 AM |
203 | |
204 | if (info.add.head == NULL) | |
205 | goto err_ret; | |
206 | ||
207 | if (hook_in_stub (&info, &os->children.head)) | |
208 | return stub_sec; | |
209 | ||
210 | err_ret: | |
211 | einfo ("%X%P: can not make stub section: %E\n"); | |
212 | return NULL; | |
213 | } | |
214 | ||
41392f03 | 215 | |
4900fc06 AM |
216 | /* Another call-back for elf32_hppa_size_stubs. */ |
217 | ||
218 | static void | |
0c7a8e5a | 219 | hppaelf_layout_sections_again (void) |
4900fc06 AM |
220 | { |
221 | /* If we have changed sizes of the stub sections, then we need | |
222 | to recalculate all the section offsets. This may mean we need to | |
223 | add even more stubs. */ | |
8ded5a0f AM |
224 | gld${EMULATION_NAME}_map_segments (TRUE); |
225 | need_laying_out = -1; | |
4900fc06 AM |
226 | } |
227 | ||
228 | ||
a3d60be3 | 229 | static void |
0c7a8e5a | 230 | build_section_lists (lang_statement_union_type *statement) |
a3d60be3 | 231 | { |
7b986e99 | 232 | if (statement->header.type == lang_input_section_enum) |
a3d60be3 | 233 | { |
7b986e99 AM |
234 | asection *i = statement->input_section.section; |
235 | ||
236 | if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag | |
237 | && (i->flags & SEC_EXCLUDE) == 0 | |
238 | && i->output_section != NULL | |
239 | && i->output_section->owner == output_bfd) | |
240 | { | |
241 | elf32_hppa_next_input_section (&link_info, i); | |
242 | } | |
a3d60be3 AM |
243 | } |
244 | } | |
245 | ||
246 | ||
252b5132 RH |
247 | /* Final emulation specific call. For the PA we use this opportunity |
248 | to build linker stubs. */ | |
249 | ||
250 | static void | |
8ded5a0f | 251 | gld${EMULATION_NAME}_finish (void) |
252b5132 | 252 | { |
deb04cdb AM |
253 | /* bfd_elf_discard_info just plays with debugging sections, |
254 | ie. doesn't affect any code, so we can delay resizing the | |
255 | sections. It's likely we'll resize everything in the process of | |
256 | adding stubs. */ | |
257 | if (bfd_elf_discard_info (output_bfd, &link_info)) | |
258 | need_laying_out = 1; | |
259 | ||
836c6af1 AM |
260 | /* If generating a relocatable output file, then we don't |
261 | have to examine the relocs. */ | |
fd574c46 | 262 | if (stub_file != NULL && !link_info.relocatable) |
252b5132 | 263 | { |
836c6af1 AM |
264 | int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info); |
265 | ||
266 | if (ret != 0) | |
a3d60be3 | 267 | { |
836c6af1 AM |
268 | if (ret < 0) |
269 | { | |
270 | einfo ("%X%P: can not size stub section: %E\n"); | |
271 | return; | |
272 | } | |
a3d60be3 | 273 | |
836c6af1 | 274 | lang_for_each_statement (build_section_lists); |
a3d60be3 | 275 | |
836c6af1 AM |
276 | /* Call into the BFD backend to do the real work. */ |
277 | if (! elf32_hppa_size_stubs (output_bfd, | |
278 | stub_file->the_bfd, | |
279 | &link_info, | |
280 | multi_subspace, | |
281 | group_size, | |
282 | &hppaelf_add_stub_section, | |
283 | &hppaelf_layout_sections_again)) | |
284 | { | |
285 | einfo ("%X%P: can not size stub section: %E\n"); | |
286 | return; | |
287 | } | |
a3d60be3 | 288 | } |
252b5132 | 289 | } |
4900fc06 | 290 | |
8ded5a0f AM |
291 | if (need_laying_out != -1) |
292 | gld${EMULATION_NAME}_map_segments (need_laying_out); | |
deb04cdb | 293 | |
1049f94e | 294 | if (! link_info.relocatable) |
3231d22e | 295 | { |
836c6af1 AM |
296 | /* Set the global data pointer. */ |
297 | if (! elf32_hppa_set_gp (output_bfd, &link_info)) | |
298 | { | |
299 | einfo ("%X%P: can not set gp\n"); | |
300 | return; | |
301 | } | |
3231d22e | 302 | |
836c6af1 | 303 | /* Now build the linker stubs. */ |
fd574c46 | 304 | if (stub_file != NULL && stub_file->the_bfd->sections != NULL) |
836c6af1 AM |
305 | { |
306 | if (! elf32_hppa_build_stubs (&link_info)) | |
deb04cdb | 307 | einfo ("%X%P: can not build stubs: %E\n"); |
836c6af1 | 308 | } |
4900fc06 | 309 | } |
b1ab9777 | 310 | |
1e035701 | 311 | finish_default (); |
4900fc06 AM |
312 | } |
313 | ||
3231d22e AM |
314 | |
315 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
316 | check_needed routines. */ | |
317 | ||
0c7a8e5a | 318 | static void (*real_func) (lang_input_statement_type *); |
3231d22e | 319 | |
0c7a8e5a | 320 | static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l) |
3231d22e AM |
321 | { |
322 | if (l != stub_file) | |
323 | (*real_func) (l); | |
324 | } | |
325 | ||
326 | static void | |
0c7a8e5a | 327 | hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) |
3231d22e AM |
328 | { |
329 | real_func = func; | |
330 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
331 | } | |
332 | ||
333 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
334 | ||
252b5132 RH |
335 | EOF |
336 | ||
3231d22e AM |
337 | # Define some shell vars to insert bits of code into the standard elf |
338 | # parse_args and list_options functions. | |
339 | # | |
340 | PARSE_AND_LIST_PROLOGUE=' | |
341 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 342 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
343 | ' |
344 | ||
345 | PARSE_AND_LIST_LONGOPTS=' | |
47d89dba | 346 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
47d89dba | 347 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
3231d22e AM |
348 | ' |
349 | ||
350 | PARSE_AND_LIST_OPTIONS=' | |
351 | fprintf (file, _("\ | |
c56feb2b AM |
352 | --multi-subspace Generate import and export stubs to support\n\ |
353 | multiple sub-space shared libraries\n" | |
47d89dba AM |
354 | )); |
355 | fprintf (file, _("\ | |
c56feb2b AM |
356 | --stub-group-size=N Maximum size of a group of input sections that can be\n\ |
357 | handled by one stub section. A negative value\n\ | |
358 | locates all stubs before their branches (with a\n\ | |
359 | group size of -N), while a positive value allows\n\ | |
360 | two groups of input sections, one before, and one\n\ | |
361 | after each stub section. Values of +/-1 indicate\n\ | |
362 | the linker should choose suitable defaults.\n" | |
3231d22e AM |
363 | )); |
364 | ' | |
365 | ||
366 | PARSE_AND_LIST_ARGS_CASES=' | |
367 | case OPTION_MULTI_SUBSPACE: | |
368 | multi_subspace = 1; | |
369 | break; | |
47d89dba AM |
370 | |
371 | case OPTION_STUBGROUP_SIZE: | |
372 | { | |
373 | const char *end; | |
374 | group_size = bfd_scan_vma (optarg, &end, 0); | |
375 | if (*end) | |
376 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
377 | } | |
378 | break; | |
3231d22e AM |
379 | ' |
380 | ||
381 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 382 | # |
ffd6e9de | 383 | LDEMUL_AFTER_PARSE=hppaelf_after_parse |
8ded5a0f | 384 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |
41392f03 | 385 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |