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, |
f13a99db | 3 | # 2005, 2007, 2008 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 | # | |
92b93329 | 26 | fragment <<EOF |
41392f03 | 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 | { |
5503fea1 AM |
70 | if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour |
71 | && elf_object_id (link_info.output_bfd) == HPPA_ELF_TDATA)) | |
fd574c46 AM |
72 | return; |
73 | ||
252b5132 RH |
74 | stub_file = lang_add_input_file ("linker stubs", |
75 | lang_input_file_is_fake_enum, | |
76 | NULL); | |
f13a99db | 77 | stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd); |
252b5132 RH |
78 | if (stub_file->the_bfd == NULL |
79 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
f13a99db AM |
80 | bfd_get_arch (link_info.output_bfd), |
81 | bfd_get_mach (link_info.output_bfd))) | |
252b5132 RH |
82 | { |
83 | einfo ("%X%P: can not create BFD %E\n"); | |
84 | return; | |
85 | } | |
86 | ||
d457dcf6 | 87 | stub_file->the_bfd->flags |= BFD_LINKER_CREATED; |
252b5132 RH |
88 | ldlang_add_file (stub_file); |
89 | } | |
90 | ||
4900fc06 AM |
91 | |
92 | struct hook_stub_info | |
93 | { | |
94 | lang_statement_list_type add; | |
95 | asection *input_section; | |
96 | }; | |
97 | ||
98 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
99 | ||
b34976b6 | 100 | static bfd_boolean |
0c7a8e5a | 101 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) |
4900fc06 AM |
102 | { |
103 | lang_statement_union_type *l; | |
b34976b6 | 104 | bfd_boolean ret; |
4900fc06 | 105 | |
bba1a0c0 | 106 | for (; (l = *lp) != NULL; lp = &l->header.next) |
4900fc06 AM |
107 | { |
108 | switch (l->header.type) | |
109 | { | |
110 | case lang_constructors_statement_enum: | |
111 | ret = hook_in_stub (info, &constructor_list.head); | |
112 | if (ret) | |
113 | return ret; | |
114 | break; | |
115 | ||
116 | case lang_output_section_statement_enum: | |
117 | ret = hook_in_stub (info, | |
118 | &l->output_section_statement.children.head); | |
119 | if (ret) | |
120 | return ret; | |
121 | break; | |
122 | ||
123 | case lang_wild_statement_enum: | |
124 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
125 | if (ret) | |
126 | return ret; | |
127 | break; | |
128 | ||
129 | case lang_group_statement_enum: | |
130 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
131 | if (ret) | |
132 | return ret; | |
133 | break; | |
134 | ||
135 | case lang_input_section_enum: | |
136 | if (l->input_section.section == info->input_section) | |
137 | { | |
138 | /* We've found our section. Insert the stub immediately | |
139 | before its associated input section. */ | |
140 | *lp = info->add.head; | |
141 | *(info->add.tail) = l; | |
b34976b6 | 142 | return TRUE; |
4900fc06 AM |
143 | } |
144 | break; | |
145 | ||
146 | case lang_data_statement_enum: | |
147 | case lang_reloc_statement_enum: | |
148 | case lang_object_symbols_statement_enum: | |
149 | case lang_output_statement_enum: | |
150 | case lang_target_statement_enum: | |
151 | case lang_input_statement_enum: | |
152 | case lang_assignment_statement_enum: | |
153 | case lang_padding_statement_enum: | |
154 | case lang_address_statement_enum: | |
155 | case lang_fill_statement_enum: | |
156 | break; | |
157 | ||
158 | default: | |
159 | FAIL (); | |
160 | break; | |
161 | } | |
162 | } | |
b34976b6 | 163 | return FALSE; |
4900fc06 AM |
164 | } |
165 | ||
41392f03 | 166 | |
4900fc06 AM |
167 | /* Call-back for elf32_hppa_size_stubs. */ |
168 | ||
169 | /* Create a new stub section, and arrange for it to be linked | |
170 | immediately before INPUT_SECTION. */ | |
171 | ||
172 | static asection * | |
0c7a8e5a | 173 | hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section) |
4900fc06 AM |
174 | { |
175 | asection *stub_sec; | |
176 | flagword flags; | |
177 | asection *output_section; | |
178 | const char *secname; | |
179 | lang_output_section_statement_type *os; | |
180 | struct hook_stub_info info; | |
181 | ||
25f72752 | 182 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); |
4900fc06 AM |
183 | if (stub_sec == NULL) |
184 | goto err_ret; | |
185 | ||
186 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
3231d22e | 187 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
4900fc06 AM |
188 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) |
189 | goto err_ret; | |
190 | ||
191 | output_section = input_section->output_section; | |
192 | secname = bfd_get_section_name (output_section->owner, output_section); | |
193 | os = lang_output_section_find (secname); | |
194 | ||
195 | info.input_section = input_section; | |
196 | lang_list_init (&info.add); | |
7b986e99 | 197 | lang_add_section (&info.add, stub_sec, os); |
4900fc06 AM |
198 | |
199 | if (info.add.head == NULL) | |
200 | goto err_ret; | |
201 | ||
202 | if (hook_in_stub (&info, &os->children.head)) | |
203 | return stub_sec; | |
204 | ||
205 | err_ret: | |
206 | einfo ("%X%P: can not make stub section: %E\n"); | |
207 | return NULL; | |
208 | } | |
209 | ||
41392f03 | 210 | |
4900fc06 AM |
211 | /* Another call-back for elf32_hppa_size_stubs. */ |
212 | ||
213 | static void | |
0c7a8e5a | 214 | hppaelf_layout_sections_again (void) |
4900fc06 AM |
215 | { |
216 | /* If we have changed sizes of the stub sections, then we need | |
217 | to recalculate all the section offsets. This may mean we need to | |
218 | add even more stubs. */ | |
8ded5a0f AM |
219 | gld${EMULATION_NAME}_map_segments (TRUE); |
220 | need_laying_out = -1; | |
4900fc06 AM |
221 | } |
222 | ||
223 | ||
a3d60be3 | 224 | static void |
0c7a8e5a | 225 | build_section_lists (lang_statement_union_type *statement) |
a3d60be3 | 226 | { |
7b986e99 | 227 | if (statement->header.type == lang_input_section_enum) |
a3d60be3 | 228 | { |
7b986e99 AM |
229 | asection *i = statement->input_section.section; |
230 | ||
231 | if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag | |
232 | && (i->flags & SEC_EXCLUDE) == 0 | |
233 | && i->output_section != NULL | |
f13a99db | 234 | && i->output_section->owner == link_info.output_bfd) |
7b986e99 AM |
235 | { |
236 | elf32_hppa_next_input_section (&link_info, i); | |
237 | } | |
a3d60be3 AM |
238 | } |
239 | } | |
240 | ||
241 | ||
252b5132 RH |
242 | /* Final emulation specific call. For the PA we use this opportunity |
243 | to build linker stubs. */ | |
244 | ||
245 | static void | |
8ded5a0f | 246 | gld${EMULATION_NAME}_finish (void) |
252b5132 | 247 | { |
deb04cdb AM |
248 | /* bfd_elf_discard_info just plays with debugging sections, |
249 | ie. doesn't affect any code, so we can delay resizing the | |
250 | sections. It's likely we'll resize everything in the process of | |
251 | adding stubs. */ | |
f13a99db | 252 | if (bfd_elf_discard_info (link_info.output_bfd, &link_info)) |
deb04cdb AM |
253 | need_laying_out = 1; |
254 | ||
836c6af1 AM |
255 | /* If generating a relocatable output file, then we don't |
256 | have to examine the relocs. */ | |
fd574c46 | 257 | if (stub_file != NULL && !link_info.relocatable) |
252b5132 | 258 | { |
f13a99db AM |
259 | int ret = elf32_hppa_setup_section_lists (link_info.output_bfd, |
260 | &link_info); | |
836c6af1 AM |
261 | |
262 | if (ret != 0) | |
a3d60be3 | 263 | { |
836c6af1 AM |
264 | if (ret < 0) |
265 | { | |
266 | einfo ("%X%P: can not size stub section: %E\n"); | |
267 | return; | |
268 | } | |
a3d60be3 | 269 | |
836c6af1 | 270 | lang_for_each_statement (build_section_lists); |
a3d60be3 | 271 | |
836c6af1 | 272 | /* Call into the BFD backend to do the real work. */ |
f13a99db | 273 | if (! elf32_hppa_size_stubs (link_info.output_bfd, |
836c6af1 AM |
274 | stub_file->the_bfd, |
275 | &link_info, | |
276 | multi_subspace, | |
277 | group_size, | |
278 | &hppaelf_add_stub_section, | |
279 | &hppaelf_layout_sections_again)) | |
280 | { | |
281 | einfo ("%X%P: can not size stub section: %E\n"); | |
282 | return; | |
283 | } | |
a3d60be3 | 284 | } |
252b5132 | 285 | } |
4900fc06 | 286 | |
8ded5a0f AM |
287 | if (need_laying_out != -1) |
288 | gld${EMULATION_NAME}_map_segments (need_laying_out); | |
deb04cdb | 289 | |
1049f94e | 290 | if (! link_info.relocatable) |
3231d22e | 291 | { |
836c6af1 | 292 | /* Set the global data pointer. */ |
f13a99db | 293 | if (! elf32_hppa_set_gp (link_info.output_bfd, &link_info)) |
836c6af1 AM |
294 | { |
295 | einfo ("%X%P: can not set gp\n"); | |
296 | return; | |
297 | } | |
3231d22e | 298 | |
836c6af1 | 299 | /* Now build the linker stubs. */ |
fd574c46 | 300 | if (stub_file != NULL && stub_file->the_bfd->sections != NULL) |
836c6af1 AM |
301 | { |
302 | if (! elf32_hppa_build_stubs (&link_info)) | |
deb04cdb | 303 | einfo ("%X%P: can not build stubs: %E\n"); |
836c6af1 | 304 | } |
4900fc06 | 305 | } |
b1ab9777 | 306 | |
1e035701 | 307 | finish_default (); |
4900fc06 AM |
308 | } |
309 | ||
3231d22e AM |
310 | |
311 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
312 | check_needed routines. */ | |
313 | ||
0c7a8e5a | 314 | static void (*real_func) (lang_input_statement_type *); |
3231d22e | 315 | |
0c7a8e5a | 316 | static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l) |
3231d22e AM |
317 | { |
318 | if (l != stub_file) | |
319 | (*real_func) (l); | |
320 | } | |
321 | ||
322 | static void | |
0c7a8e5a | 323 | hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) |
3231d22e AM |
324 | { |
325 | real_func = func; | |
326 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
327 | } | |
328 | ||
329 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
330 | ||
252b5132 RH |
331 | EOF |
332 | ||
3231d22e AM |
333 | # Define some shell vars to insert bits of code into the standard elf |
334 | # parse_args and list_options functions. | |
335 | # | |
336 | PARSE_AND_LIST_PROLOGUE=' | |
337 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 338 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
339 | ' |
340 | ||
341 | PARSE_AND_LIST_LONGOPTS=' | |
47d89dba | 342 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
47d89dba | 343 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
3231d22e AM |
344 | ' |
345 | ||
346 | PARSE_AND_LIST_OPTIONS=' | |
347 | fprintf (file, _("\ | |
442996ee AM |
348 | --multi-subspace Generate import and export stubs to support\n\ |
349 | multiple sub-space shared libraries\n" | |
47d89dba AM |
350 | )); |
351 | fprintf (file, _("\ | |
442996ee AM |
352 | --stub-group-size=N Maximum size of a group of input sections that\n\ |
353 | can be handled by one stub section. A negative\n\ | |
354 | value locates all stubs before their branches\n\ | |
355 | (with a group size of -N), while a positive\n\ | |
356 | value allows two groups of input sections, one\n\ | |
357 | before, and one after each stub section.\n\ | |
358 | Values of +/-1 indicate the linker should\n\ | |
359 | choose suitable defaults.\n" | |
3231d22e AM |
360 | )); |
361 | ' | |
362 | ||
363 | PARSE_AND_LIST_ARGS_CASES=' | |
364 | case OPTION_MULTI_SUBSPACE: | |
365 | multi_subspace = 1; | |
366 | break; | |
47d89dba AM |
367 | |
368 | case OPTION_STUBGROUP_SIZE: | |
369 | { | |
370 | const char *end; | |
371 | group_size = bfd_scan_vma (optarg, &end, 0); | |
372 | if (*end) | |
373 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
374 | } | |
375 | break; | |
3231d22e AM |
376 | ' |
377 | ||
378 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 379 | # |
ffd6e9de | 380 | LDEMUL_AFTER_PARSE=hppaelf_after_parse |
8ded5a0f | 381 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |
41392f03 | 382 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |