Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
cf888e70 | 2 | # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001, 2002, 2003 |
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 | |
252b5132 | 30 | |
4900fc06 AM |
31 | /* Fake input file for stubs. */ |
32 | static lang_input_statement_type *stub_file; | |
252b5132 | 33 | |
3231d22e AM |
34 | /* Type of import/export stubs to build. For a single sub-space model, |
35 | we can build smaller import stubs and there is no need for export | |
36 | stubs. */ | |
37 | static int multi_subspace = 0; | |
252b5132 | 38 | |
c56feb2b AM |
39 | /* Whether we need to call hppa_layout_sections_again. */ |
40 | static int need_laying_out = 0; | |
41 | ||
47d89dba AM |
42 | /* Maximum size of a group of input sections that can be handled by |
43 | one stub section. A value of +/-1 indicates the bfd back-end | |
44 | should use a suitable default size. */ | |
cfbd8dfa | 45 | static bfd_signed_vma group_size = 1; |
252b5132 | 46 | |
ffd6e9de AM |
47 | /* Stops the linker merging .text sections on a relocatable link, |
48 | and adds millicode library to the list of input files. */ | |
49 | ||
50 | static void | |
0c7a8e5a | 51 | hppaelf_after_parse (void) |
ffd6e9de | 52 | { |
1049f94e | 53 | if (link_info.relocatable) |
ffd6e9de | 54 | lang_add_unique (".text"); |
cf888e70 | 55 | #if 0 /* Enable this once we split millicode stuff from libgcc. */ |
ffd6e9de AM |
56 | else |
57 | lang_add_input_file ("milli", | |
58 | lang_input_file_is_l_enum, | |
59 | NULL); | |
60 | #endif | |
61 | } | |
62 | ||
252b5132 | 63 | /* This is called before the input files are opened. We create a new |
4900fc06 | 64 | fake input file to hold the stub sections. */ |
252b5132 RH |
65 | |
66 | static void | |
0c7a8e5a | 67 | hppaelf_create_output_section_statements (void) |
252b5132 RH |
68 | { |
69 | stub_file = lang_add_input_file ("linker stubs", | |
70 | lang_input_file_is_fake_enum, | |
71 | NULL); | |
72 | stub_file->the_bfd = bfd_create ("linker stubs", output_bfd); | |
73 | if (stub_file->the_bfd == NULL | |
74 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
75 | bfd_get_arch (output_bfd), | |
76 | bfd_get_mach (output_bfd))) | |
77 | { | |
78 | einfo ("%X%P: can not create BFD %E\n"); | |
79 | return; | |
80 | } | |
81 | ||
252b5132 RH |
82 | ldlang_add_file (stub_file); |
83 | } | |
84 | ||
4900fc06 AM |
85 | |
86 | struct hook_stub_info | |
87 | { | |
88 | lang_statement_list_type add; | |
89 | asection *input_section; | |
90 | }; | |
91 | ||
92 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
93 | ||
b34976b6 | 94 | static bfd_boolean |
0c7a8e5a | 95 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) |
4900fc06 AM |
96 | { |
97 | lang_statement_union_type *l; | |
b34976b6 | 98 | bfd_boolean ret; |
4900fc06 | 99 | |
bba1a0c0 | 100 | for (; (l = *lp) != NULL; lp = &l->header.next) |
4900fc06 AM |
101 | { |
102 | switch (l->header.type) | |
103 | { | |
104 | case lang_constructors_statement_enum: | |
105 | ret = hook_in_stub (info, &constructor_list.head); | |
106 | if (ret) | |
107 | return ret; | |
108 | break; | |
109 | ||
110 | case lang_output_section_statement_enum: | |
111 | ret = hook_in_stub (info, | |
112 | &l->output_section_statement.children.head); | |
113 | if (ret) | |
114 | return ret; | |
115 | break; | |
116 | ||
117 | case lang_wild_statement_enum: | |
118 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
119 | if (ret) | |
120 | return ret; | |
121 | break; | |
122 | ||
123 | case lang_group_statement_enum: | |
124 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
125 | if (ret) | |
126 | return ret; | |
127 | break; | |
128 | ||
129 | case lang_input_section_enum: | |
130 | if (l->input_section.section == info->input_section) | |
131 | { | |
132 | /* We've found our section. Insert the stub immediately | |
133 | before its associated input section. */ | |
134 | *lp = info->add.head; | |
135 | *(info->add.tail) = l; | |
b34976b6 | 136 | return TRUE; |
4900fc06 AM |
137 | } |
138 | break; | |
139 | ||
140 | case lang_data_statement_enum: | |
141 | case lang_reloc_statement_enum: | |
142 | case lang_object_symbols_statement_enum: | |
143 | case lang_output_statement_enum: | |
144 | case lang_target_statement_enum: | |
145 | case lang_input_statement_enum: | |
146 | case lang_assignment_statement_enum: | |
147 | case lang_padding_statement_enum: | |
148 | case lang_address_statement_enum: | |
149 | case lang_fill_statement_enum: | |
150 | break; | |
151 | ||
152 | default: | |
153 | FAIL (); | |
154 | break; | |
155 | } | |
156 | } | |
b34976b6 | 157 | return FALSE; |
4900fc06 AM |
158 | } |
159 | ||
41392f03 | 160 | |
4900fc06 AM |
161 | /* Call-back for elf32_hppa_size_stubs. */ |
162 | ||
163 | /* Create a new stub section, and arrange for it to be linked | |
164 | immediately before INPUT_SECTION. */ | |
165 | ||
166 | static asection * | |
0c7a8e5a | 167 | hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section) |
4900fc06 AM |
168 | { |
169 | asection *stub_sec; | |
170 | flagword flags; | |
171 | asection *output_section; | |
172 | const char *secname; | |
173 | lang_output_section_statement_type *os; | |
174 | struct hook_stub_info info; | |
175 | ||
25f72752 | 176 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); |
4900fc06 AM |
177 | if (stub_sec == NULL) |
178 | goto err_ret; | |
179 | ||
180 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
3231d22e | 181 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
4900fc06 AM |
182 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) |
183 | goto err_ret; | |
184 | ||
185 | output_section = input_section->output_section; | |
186 | secname = bfd_get_section_name (output_section->owner, output_section); | |
187 | os = lang_output_section_find (secname); | |
188 | ||
189 | info.input_section = input_section; | |
190 | lang_list_init (&info.add); | |
39dcfe18 | 191 | lang_add_section (&info.add, stub_sec, os, stub_file); |
4900fc06 AM |
192 | |
193 | if (info.add.head == NULL) | |
194 | goto err_ret; | |
195 | ||
196 | if (hook_in_stub (&info, &os->children.head)) | |
197 | return stub_sec; | |
198 | ||
199 | err_ret: | |
200 | einfo ("%X%P: can not make stub section: %E\n"); | |
201 | return NULL; | |
202 | } | |
203 | ||
41392f03 | 204 | |
4900fc06 AM |
205 | /* Another call-back for elf32_hppa_size_stubs. */ |
206 | ||
207 | static void | |
0c7a8e5a | 208 | hppaelf_layout_sections_again (void) |
4900fc06 AM |
209 | { |
210 | /* If we have changed sizes of the stub sections, then we need | |
211 | to recalculate all the section offsets. This may mean we need to | |
212 | add even more stubs. */ | |
c56feb2b | 213 | need_laying_out = 0; |
4900fc06 | 214 | |
76dc39fe HPN |
215 | lang_reset_memory_regions (); |
216 | ||
4900fc06 AM |
217 | /* Resize the sections. */ |
218 | lang_size_sections (stat_ptr->head, abs_output_section, | |
cf888e70 | 219 | &stat_ptr->head, 0, (bfd_vma) 0, NULL, TRUE); |
4900fc06 AM |
220 | |
221 | /* Redo special stuff. */ | |
222 | ldemul_after_allocation (); | |
223 | ||
224 | /* Do the assignments again. */ | |
225 | lang_do_assignments (stat_ptr->head, abs_output_section, | |
2c382fb6 | 226 | (fill_type *) 0, (bfd_vma) 0); |
4900fc06 AM |
227 | } |
228 | ||
229 | ||
a3d60be3 | 230 | static void |
0c7a8e5a | 231 | build_section_lists (lang_statement_union_type *statement) |
a3d60be3 AM |
232 | { |
233 | if (statement->header.type == lang_input_section_enum | |
234 | && !statement->input_section.ifile->just_syms_flag | |
235 | && statement->input_section.section->output_section != NULL | |
236 | && statement->input_section.section->output_section->owner == output_bfd) | |
237 | { | |
238 | elf32_hppa_next_input_section (&link_info, | |
239 | statement->input_section.section); | |
240 | } | |
241 | } | |
242 | ||
243 | ||
252b5132 RH |
244 | /* Final emulation specific call. For the PA we use this opportunity |
245 | to build linker stubs. */ | |
246 | ||
247 | static void | |
0c7a8e5a | 248 | gld${EMULATION_NAME}_finish (void) |
252b5132 | 249 | { |
c56feb2b AM |
250 | /* bfd_elf32_discard_info just plays with debugging sections, |
251 | ie. doesn't affect any code, so we can delay resizing the | |
252 | sections. It's likely we'll resize everything in the process of | |
253 | adding stubs. */ | |
65765700 | 254 | if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info)) |
c56feb2b AM |
255 | need_laying_out = 1; |
256 | ||
836c6af1 AM |
257 | /* If generating a relocatable output file, then we don't |
258 | have to examine the relocs. */ | |
1049f94e | 259 | if (! link_info.relocatable) |
252b5132 | 260 | { |
836c6af1 AM |
261 | int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info); |
262 | ||
263 | if (ret != 0) | |
a3d60be3 | 264 | { |
836c6af1 AM |
265 | if (ret < 0) |
266 | { | |
267 | einfo ("%X%P: can not size stub section: %E\n"); | |
268 | return; | |
269 | } | |
a3d60be3 | 270 | |
836c6af1 | 271 | lang_for_each_statement (build_section_lists); |
a3d60be3 | 272 | |
836c6af1 AM |
273 | /* Call into the BFD backend to do the real work. */ |
274 | if (! elf32_hppa_size_stubs (output_bfd, | |
275 | stub_file->the_bfd, | |
276 | &link_info, | |
277 | multi_subspace, | |
278 | group_size, | |
279 | &hppaelf_add_stub_section, | |
280 | &hppaelf_layout_sections_again)) | |
281 | { | |
282 | einfo ("%X%P: can not size stub section: %E\n"); | |
283 | return; | |
284 | } | |
a3d60be3 | 285 | } |
252b5132 | 286 | } |
4900fc06 | 287 | |
c56feb2b AM |
288 | if (need_laying_out) |
289 | hppaelf_layout_sections_again (); | |
290 | ||
1049f94e | 291 | if (! link_info.relocatable) |
3231d22e | 292 | { |
836c6af1 AM |
293 | /* Set the global data pointer. */ |
294 | if (! elf32_hppa_set_gp (output_bfd, &link_info)) | |
295 | { | |
296 | einfo ("%X%P: can not set gp\n"); | |
297 | return; | |
298 | } | |
3231d22e | 299 | |
836c6af1 AM |
300 | /* Now build the linker stubs. */ |
301 | if (stub_file->the_bfd->sections != NULL) | |
302 | { | |
303 | if (! elf32_hppa_build_stubs (&link_info)) | |
304 | einfo ("%X%P: can not build stubs: %E\n"); | |
305 | } | |
4900fc06 AM |
306 | } |
307 | } | |
308 | ||
3231d22e AM |
309 | |
310 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
311 | check_needed routines. */ | |
312 | ||
0c7a8e5a | 313 | static void (*real_func) (lang_input_statement_type *); |
3231d22e | 314 | |
0c7a8e5a | 315 | static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l) |
3231d22e AM |
316 | { |
317 | if (l != stub_file) | |
318 | (*real_func) (l); | |
319 | } | |
320 | ||
321 | static void | |
0c7a8e5a | 322 | hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) |
3231d22e AM |
323 | { |
324 | real_func = func; | |
325 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
326 | } | |
327 | ||
328 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
329 | ||
252b5132 RH |
330 | EOF |
331 | ||
3231d22e AM |
332 | # Define some shell vars to insert bits of code into the standard elf |
333 | # parse_args and list_options functions. | |
334 | # | |
335 | PARSE_AND_LIST_PROLOGUE=' | |
336 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 337 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
338 | ' |
339 | ||
340 | PARSE_AND_LIST_LONGOPTS=' | |
47d89dba | 341 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
47d89dba | 342 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
3231d22e AM |
343 | ' |
344 | ||
345 | PARSE_AND_LIST_OPTIONS=' | |
346 | fprintf (file, _("\ | |
c56feb2b AM |
347 | --multi-subspace Generate import and export stubs to support\n\ |
348 | multiple sub-space shared libraries\n" | |
47d89dba AM |
349 | )); |
350 | fprintf (file, _("\ | |
c56feb2b AM |
351 | --stub-group-size=N Maximum size of a group of input sections that can be\n\ |
352 | handled by one stub section. A negative value\n\ | |
353 | locates all stubs before their branches (with a\n\ | |
354 | group size of -N), while a positive value allows\n\ | |
355 | two groups of input sections, one before, and one\n\ | |
356 | after each stub section. Values of +/-1 indicate\n\ | |
357 | the linker should choose suitable defaults.\n" | |
3231d22e AM |
358 | )); |
359 | ' | |
360 | ||
361 | PARSE_AND_LIST_ARGS_CASES=' | |
362 | case OPTION_MULTI_SUBSPACE: | |
363 | multi_subspace = 1; | |
364 | break; | |
47d89dba AM |
365 | |
366 | case OPTION_STUBGROUP_SIZE: | |
367 | { | |
368 | const char *end; | |
369 | group_size = bfd_scan_vma (optarg, &end, 0); | |
370 | if (*end) | |
371 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
372 | } | |
373 | break; | |
3231d22e AM |
374 | ' |
375 | ||
376 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 377 | # |
ffd6e9de | 378 | LDEMUL_AFTER_PARSE=hppaelf_after_parse |
c56feb2b | 379 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |
41392f03 | 380 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |