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${EMULATION_NAME}.c <<EOF | |
26 | ||
252b5132 | 27 | #include "ldctor.h" |
4900fc06 | 28 | #include "elf32-hppa.h" |
252b5132 | 29 | |
cf888e70 | 30 | static void hppaelf_after_parse PARAMS ((void)); |
4900fc06 | 31 | static void hppaelf_create_output_section_statements PARAMS ((void)); |
41392f03 AM |
32 | static asection *hppaelf_add_stub_section |
33 | PARAMS ((const char *, asection *)); | |
c56feb2b AM |
34 | static void hppaelf_layout_sections_again PARAMS ((void)); |
35 | static void gld${EMULATION_NAME}_finish PARAMS ((void)); | |
a3d60be3 | 36 | static void build_section_lists PARAMS ((lang_statement_union_type *)); |
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 | |
c56feb2b AM |
47 | /* Whether we need to call hppa_layout_sections_again. */ |
48 | static int need_laying_out = 0; | |
49 | ||
47d89dba AM |
50 | /* Maximum size of a group of input sections that can be handled by |
51 | one stub section. A value of +/-1 indicates the bfd back-end | |
52 | should use a suitable default size. */ | |
cfbd8dfa | 53 | static bfd_signed_vma group_size = 1; |
252b5132 | 54 | |
ffd6e9de AM |
55 | /* Stops the linker merging .text sections on a relocatable link, |
56 | and adds millicode library to the list of input files. */ | |
57 | ||
58 | static void | |
59 | hppaelf_after_parse () | |
60 | { | |
61 | if (link_info.relocateable) | |
62 | lang_add_unique (".text"); | |
cf888e70 | 63 | #if 0 /* Enable this once we split millicode stuff from libgcc. */ |
ffd6e9de AM |
64 | else |
65 | lang_add_input_file ("milli", | |
66 | lang_input_file_is_l_enum, | |
67 | NULL); | |
68 | #endif | |
69 | } | |
70 | ||
252b5132 | 71 | /* This is called before the input files are opened. We create a new |
4900fc06 | 72 | fake input file to hold the stub sections. */ |
252b5132 RH |
73 | |
74 | static void | |
75 | hppaelf_create_output_section_statements () | |
76 | { | |
77 | stub_file = lang_add_input_file ("linker stubs", | |
78 | lang_input_file_is_fake_enum, | |
79 | NULL); | |
80 | stub_file->the_bfd = bfd_create ("linker stubs", output_bfd); | |
81 | if (stub_file->the_bfd == NULL | |
82 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
83 | bfd_get_arch (output_bfd), | |
84 | bfd_get_mach (output_bfd))) | |
85 | { | |
86 | einfo ("%X%P: can not create BFD %E\n"); | |
87 | return; | |
88 | } | |
89 | ||
252b5132 RH |
90 | ldlang_add_file (stub_file); |
91 | } | |
92 | ||
4900fc06 AM |
93 | |
94 | struct hook_stub_info | |
95 | { | |
96 | lang_statement_list_type add; | |
97 | asection *input_section; | |
98 | }; | |
99 | ||
100 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
101 | ||
b34976b6 | 102 | static bfd_boolean hook_in_stub |
41392f03 AM |
103 | PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); |
104 | ||
b34976b6 | 105 | static bfd_boolean |
4900fc06 AM |
106 | hook_in_stub (info, lp) |
107 | struct hook_stub_info *info; | |
108 | lang_statement_union_type **lp; | |
109 | { | |
110 | lang_statement_union_type *l; | |
b34976b6 | 111 | bfd_boolean ret; |
4900fc06 | 112 | |
bba1a0c0 | 113 | for (; (l = *lp) != NULL; lp = &l->header.next) |
4900fc06 AM |
114 | { |
115 | switch (l->header.type) | |
116 | { | |
117 | case lang_constructors_statement_enum: | |
118 | ret = hook_in_stub (info, &constructor_list.head); | |
119 | if (ret) | |
120 | return ret; | |
121 | break; | |
122 | ||
123 | case lang_output_section_statement_enum: | |
124 | ret = hook_in_stub (info, | |
125 | &l->output_section_statement.children.head); | |
126 | if (ret) | |
127 | return ret; | |
128 | break; | |
129 | ||
130 | case lang_wild_statement_enum: | |
131 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
132 | if (ret) | |
133 | return ret; | |
134 | break; | |
135 | ||
136 | case lang_group_statement_enum: | |
137 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
138 | if (ret) | |
139 | return ret; | |
140 | break; | |
141 | ||
142 | case lang_input_section_enum: | |
143 | if (l->input_section.section == info->input_section) | |
144 | { | |
145 | /* We've found our section. Insert the stub immediately | |
146 | before its associated input section. */ | |
147 | *lp = info->add.head; | |
148 | *(info->add.tail) = l; | |
b34976b6 | 149 | return TRUE; |
4900fc06 AM |
150 | } |
151 | break; | |
152 | ||
153 | case lang_data_statement_enum: | |
154 | case lang_reloc_statement_enum: | |
155 | case lang_object_symbols_statement_enum: | |
156 | case lang_output_statement_enum: | |
157 | case lang_target_statement_enum: | |
158 | case lang_input_statement_enum: | |
159 | case lang_assignment_statement_enum: | |
160 | case lang_padding_statement_enum: | |
161 | case lang_address_statement_enum: | |
162 | case lang_fill_statement_enum: | |
163 | break; | |
164 | ||
165 | default: | |
166 | FAIL (); | |
167 | break; | |
168 | } | |
169 | } | |
b34976b6 | 170 | return FALSE; |
4900fc06 AM |
171 | } |
172 | ||
41392f03 | 173 | |
4900fc06 AM |
174 | /* Call-back for elf32_hppa_size_stubs. */ |
175 | ||
176 | /* Create a new stub section, and arrange for it to be linked | |
177 | immediately before INPUT_SECTION. */ | |
178 | ||
179 | static asection * | |
25f72752 AM |
180 | hppaelf_add_stub_section (stub_sec_name, input_section) |
181 | const char *stub_sec_name; | |
4900fc06 AM |
182 | asection *input_section; |
183 | { | |
184 | asection *stub_sec; | |
185 | flagword flags; | |
186 | asection *output_section; | |
187 | const char *secname; | |
188 | lang_output_section_statement_type *os; | |
189 | struct hook_stub_info info; | |
190 | ||
25f72752 | 191 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name); |
4900fc06 AM |
192 | if (stub_sec == NULL) |
193 | goto err_ret; | |
194 | ||
195 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
3231d22e | 196 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
4900fc06 AM |
197 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) |
198 | goto err_ret; | |
199 | ||
200 | output_section = input_section->output_section; | |
201 | secname = bfd_get_section_name (output_section->owner, output_section); | |
202 | os = lang_output_section_find (secname); | |
203 | ||
204 | info.input_section = input_section; | |
205 | lang_list_init (&info.add); | |
39dcfe18 | 206 | lang_add_section (&info.add, stub_sec, os, stub_file); |
4900fc06 AM |
207 | |
208 | if (info.add.head == NULL) | |
209 | goto err_ret; | |
210 | ||
211 | if (hook_in_stub (&info, &os->children.head)) | |
212 | return stub_sec; | |
213 | ||
214 | err_ret: | |
215 | einfo ("%X%P: can not make stub section: %E\n"); | |
216 | return NULL; | |
217 | } | |
218 | ||
41392f03 | 219 | |
4900fc06 AM |
220 | /* Another call-back for elf32_hppa_size_stubs. */ |
221 | ||
222 | static void | |
c56feb2b | 223 | hppaelf_layout_sections_again () |
4900fc06 AM |
224 | { |
225 | /* If we have changed sizes of the stub sections, then we need | |
226 | to recalculate all the section offsets. This may mean we need to | |
227 | add even more stubs. */ | |
c56feb2b | 228 | need_laying_out = 0; |
4900fc06 | 229 | |
76dc39fe HPN |
230 | lang_reset_memory_regions (); |
231 | ||
4900fc06 AM |
232 | /* Resize the sections. */ |
233 | lang_size_sections (stat_ptr->head, abs_output_section, | |
cf888e70 | 234 | &stat_ptr->head, 0, (bfd_vma) 0, NULL, TRUE); |
4900fc06 AM |
235 | |
236 | /* Redo special stuff. */ | |
237 | ldemul_after_allocation (); | |
238 | ||
239 | /* Do the assignments again. */ | |
240 | lang_do_assignments (stat_ptr->head, abs_output_section, | |
2c382fb6 | 241 | (fill_type *) 0, (bfd_vma) 0); |
4900fc06 AM |
242 | } |
243 | ||
244 | ||
a3d60be3 AM |
245 | static void |
246 | build_section_lists (statement) | |
247 | lang_statement_union_type *statement; | |
248 | { | |
249 | if (statement->header.type == lang_input_section_enum | |
250 | && !statement->input_section.ifile->just_syms_flag | |
251 | && statement->input_section.section->output_section != NULL | |
252 | && statement->input_section.section->output_section->owner == output_bfd) | |
253 | { | |
254 | elf32_hppa_next_input_section (&link_info, | |
255 | statement->input_section.section); | |
256 | } | |
257 | } | |
258 | ||
259 | ||
252b5132 RH |
260 | /* Final emulation specific call. For the PA we use this opportunity |
261 | to build linker stubs. */ | |
262 | ||
263 | static void | |
c56feb2b | 264 | gld${EMULATION_NAME}_finish () |
252b5132 | 265 | { |
c56feb2b AM |
266 | /* bfd_elf32_discard_info just plays with debugging sections, |
267 | ie. doesn't affect any code, so we can delay resizing the | |
268 | sections. It's likely we'll resize everything in the process of | |
269 | adding stubs. */ | |
65765700 | 270 | if (bfd_elf${ELFSIZE}_discard_info (output_bfd, &link_info)) |
c56feb2b AM |
271 | need_laying_out = 1; |
272 | ||
836c6af1 AM |
273 | /* If generating a relocatable output file, then we don't |
274 | have to examine the relocs. */ | |
275 | if (! link_info.relocateable) | |
252b5132 | 276 | { |
836c6af1 AM |
277 | int ret = elf32_hppa_setup_section_lists (output_bfd, &link_info); |
278 | ||
279 | if (ret != 0) | |
a3d60be3 | 280 | { |
836c6af1 AM |
281 | if (ret < 0) |
282 | { | |
283 | einfo ("%X%P: can not size stub section: %E\n"); | |
284 | return; | |
285 | } | |
a3d60be3 | 286 | |
836c6af1 | 287 | lang_for_each_statement (build_section_lists); |
a3d60be3 | 288 | |
836c6af1 AM |
289 | /* Call into the BFD backend to do the real work. */ |
290 | if (! elf32_hppa_size_stubs (output_bfd, | |
291 | stub_file->the_bfd, | |
292 | &link_info, | |
293 | multi_subspace, | |
294 | group_size, | |
295 | &hppaelf_add_stub_section, | |
296 | &hppaelf_layout_sections_again)) | |
297 | { | |
298 | einfo ("%X%P: can not size stub section: %E\n"); | |
299 | return; | |
300 | } | |
a3d60be3 | 301 | } |
252b5132 | 302 | } |
4900fc06 | 303 | |
c56feb2b AM |
304 | if (need_laying_out) |
305 | hppaelf_layout_sections_again (); | |
306 | ||
836c6af1 | 307 | if (! link_info.relocateable) |
3231d22e | 308 | { |
836c6af1 AM |
309 | /* Set the global data pointer. */ |
310 | if (! elf32_hppa_set_gp (output_bfd, &link_info)) | |
311 | { | |
312 | einfo ("%X%P: can not set gp\n"); | |
313 | return; | |
314 | } | |
3231d22e | 315 | |
836c6af1 AM |
316 | /* Now build the linker stubs. */ |
317 | if (stub_file->the_bfd->sections != NULL) | |
318 | { | |
319 | if (! elf32_hppa_build_stubs (&link_info)) | |
320 | einfo ("%X%P: can not build stubs: %E\n"); | |
321 | } | |
4900fc06 AM |
322 | } |
323 | } | |
324 | ||
3231d22e AM |
325 | |
326 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
327 | check_needed routines. */ | |
328 | ||
329 | static void hppa_for_each_input_file_wrapper | |
330 | PARAMS ((lang_input_statement_type *)); | |
331 | static void hppa_lang_for_each_input_file | |
332 | PARAMS ((void (*) (lang_input_statement_type *))); | |
333 | ||
334 | static void (*real_func) PARAMS ((lang_input_statement_type *)); | |
335 | ||
336 | static void hppa_for_each_input_file_wrapper (l) | |
337 | lang_input_statement_type *l; | |
338 | { | |
339 | if (l != stub_file) | |
340 | (*real_func) (l); | |
341 | } | |
342 | ||
343 | static void | |
344 | hppa_lang_for_each_input_file (func) | |
345 | void (*func) PARAMS ((lang_input_statement_type *)); | |
346 | { | |
347 | real_func = func; | |
348 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
349 | } | |
350 | ||
351 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
352 | ||
252b5132 RH |
353 | EOF |
354 | ||
3231d22e AM |
355 | # Define some shell vars to insert bits of code into the standard elf |
356 | # parse_args and list_options functions. | |
357 | # | |
358 | PARSE_AND_LIST_PROLOGUE=' | |
359 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 360 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
361 | ' |
362 | ||
363 | PARSE_AND_LIST_LONGOPTS=' | |
47d89dba | 364 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
47d89dba | 365 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
3231d22e AM |
366 | ' |
367 | ||
368 | PARSE_AND_LIST_OPTIONS=' | |
369 | fprintf (file, _("\ | |
c56feb2b AM |
370 | --multi-subspace Generate import and export stubs to support\n\ |
371 | multiple sub-space shared libraries\n" | |
47d89dba AM |
372 | )); |
373 | fprintf (file, _("\ | |
c56feb2b AM |
374 | --stub-group-size=N Maximum size of a group of input sections that can be\n\ |
375 | handled by one stub section. A negative value\n\ | |
376 | locates all stubs before their branches (with a\n\ | |
377 | group size of -N), while a positive value allows\n\ | |
378 | two groups of input sections, one before, and one\n\ | |
379 | after each stub section. Values of +/-1 indicate\n\ | |
380 | the linker should choose suitable defaults.\n" | |
3231d22e AM |
381 | )); |
382 | ' | |
383 | ||
384 | PARSE_AND_LIST_ARGS_CASES=' | |
385 | case OPTION_MULTI_SUBSPACE: | |
386 | multi_subspace = 1; | |
387 | break; | |
47d89dba AM |
388 | |
389 | case OPTION_STUBGROUP_SIZE: | |
390 | { | |
391 | const char *end; | |
392 | group_size = bfd_scan_vma (optarg, &end, 0); | |
393 | if (*end) | |
394 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
395 | } | |
396 | break; | |
3231d22e AM |
397 | ' |
398 | ||
399 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 400 | # |
ffd6e9de | 401 | LDEMUL_AFTER_PARSE=hppaelf_after_parse |
c56feb2b | 402 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |
41392f03 | 403 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |