Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
a2b64bed | 2 | # Copyright 1991, 1993, 1994, 1997, 1999, 2000, 2001 |
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 | |
ffd6e9de | 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 *)); | |
34 | static void hppaelf_layaout_sections_again PARAMS ((void)); | |
4900fc06 | 35 | static void hppaelf_finish PARAMS ((void)); |
252b5132 RH |
36 | |
37 | ||
4900fc06 AM |
38 | /* Fake input file for stubs. */ |
39 | static lang_input_statement_type *stub_file; | |
252b5132 | 40 | |
3231d22e AM |
41 | /* Type of import/export stubs to build. For a single sub-space model, |
42 | we can build smaller import stubs and there is no need for export | |
43 | stubs. */ | |
44 | static int multi_subspace = 0; | |
252b5132 | 45 | |
47d89dba AM |
46 | /* Maximum size of a group of input sections that can be handled by |
47 | one stub section. A value of +/-1 indicates the bfd back-end | |
48 | should use a suitable default size. */ | |
49 | static bfd_signed_vma group_size = 1; | |
252b5132 | 50 | |
ffd6e9de AM |
51 | /* Stops the linker merging .text sections on a relocatable link, |
52 | and adds millicode library to the list of input files. */ | |
53 | ||
54 | static void | |
55 | hppaelf_after_parse () | |
56 | { | |
57 | if (link_info.relocateable) | |
58 | lang_add_unique (".text"); | |
59 | #if 0 /* enable this once we split millicode stuff from libgcc */ | |
60 | else | |
61 | lang_add_input_file ("milli", | |
62 | lang_input_file_is_l_enum, | |
63 | NULL); | |
64 | #endif | |
65 | } | |
66 | ||
252b5132 | 67 | /* This is called before the input files are opened. We create a new |
4900fc06 | 68 | fake input file to hold the stub sections. */ |
252b5132 RH |
69 | |
70 | static void | |
71 | hppaelf_create_output_section_statements () | |
72 | { | |
73 | stub_file = lang_add_input_file ("linker stubs", | |
74 | lang_input_file_is_fake_enum, | |
75 | NULL); | |
76 | stub_file->the_bfd = bfd_create ("linker stubs", output_bfd); | |
77 | if (stub_file->the_bfd == NULL | |
78 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
79 | bfd_get_arch (output_bfd), | |
80 | bfd_get_mach (output_bfd))) | |
81 | { | |
82 | einfo ("%X%P: can not create BFD %E\n"); | |
83 | return; | |
84 | } | |
85 | ||
252b5132 RH |
86 | ldlang_add_file (stub_file); |
87 | } | |
88 | ||
4900fc06 AM |
89 | |
90 | struct hook_stub_info | |
91 | { | |
92 | lang_statement_list_type add; | |
93 | asection *input_section; | |
94 | }; | |
95 | ||
96 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
97 | ||
41392f03 AM |
98 | static boolean hook_in_stub |
99 | PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); | |
100 | ||
4900fc06 AM |
101 | static boolean |
102 | hook_in_stub (info, lp) | |
103 | struct hook_stub_info *info; | |
104 | lang_statement_union_type **lp; | |
105 | { | |
106 | lang_statement_union_type *l; | |
107 | boolean ret; | |
108 | ||
109 | for (; (l = *lp) != NULL; lp = &l->next) | |
110 | { | |
111 | switch (l->header.type) | |
112 | { | |
113 | case lang_constructors_statement_enum: | |
114 | ret = hook_in_stub (info, &constructor_list.head); | |
115 | if (ret) | |
116 | return ret; | |
117 | break; | |
118 | ||
119 | case lang_output_section_statement_enum: | |
120 | ret = hook_in_stub (info, | |
121 | &l->output_section_statement.children.head); | |
122 | if (ret) | |
123 | return ret; | |
124 | break; | |
125 | ||
126 | case lang_wild_statement_enum: | |
127 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
128 | if (ret) | |
129 | return ret; | |
130 | break; | |
131 | ||
132 | case lang_group_statement_enum: | |
133 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
134 | if (ret) | |
135 | return ret; | |
136 | break; | |
137 | ||
138 | case lang_input_section_enum: | |
139 | if (l->input_section.section == info->input_section) | |
140 | { | |
141 | /* We've found our section. Insert the stub immediately | |
142 | before its associated input section. */ | |
143 | *lp = info->add.head; | |
144 | *(info->add.tail) = l; | |
145 | return true; | |
146 | } | |
147 | break; | |
148 | ||
149 | case lang_data_statement_enum: | |
150 | case lang_reloc_statement_enum: | |
151 | case lang_object_symbols_statement_enum: | |
152 | case lang_output_statement_enum: | |
153 | case lang_target_statement_enum: | |
154 | case lang_input_statement_enum: | |
155 | case lang_assignment_statement_enum: | |
156 | case lang_padding_statement_enum: | |
157 | case lang_address_statement_enum: | |
158 | case lang_fill_statement_enum: | |
159 | break; | |
160 | ||
161 | default: | |
162 | FAIL (); | |
163 | break; | |
164 | } | |
165 | } | |
166 | return false; | |
167 | } | |
168 | ||
41392f03 | 169 | |
4900fc06 AM |
170 | /* Call-back for elf32_hppa_size_stubs. */ |
171 | ||
172 | /* Create a new stub section, and arrange for it to be linked | |
173 | immediately before INPUT_SECTION. */ | |
174 | ||
175 | static asection * | |
25f72752 AM |
176 | hppaelf_add_stub_section (stub_sec_name, input_section) |
177 | const char *stub_sec_name; | |
4900fc06 AM |
178 | asection *input_section; |
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); | |
39dcfe18 | 202 | lang_add_section (&info.add, stub_sec, os, stub_file); |
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 | |
219 | hppaelf_layaout_sections_again () | |
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. */ | |
224 | ||
4900fc06 AM |
225 | /* Resize the sections. */ |
226 | lang_size_sections (stat_ptr->head, abs_output_section, | |
227 | &stat_ptr->head, 0, (bfd_vma) 0, false); | |
228 | ||
229 | /* Redo special stuff. */ | |
230 | ldemul_after_allocation (); | |
231 | ||
232 | /* Do the assignments again. */ | |
233 | lang_do_assignments (stat_ptr->head, abs_output_section, | |
234 | (fill_type) 0, (bfd_vma) 0); | |
235 | } | |
236 | ||
237 | ||
252b5132 RH |
238 | /* Final emulation specific call. For the PA we use this opportunity |
239 | to build linker stubs. */ | |
240 | ||
241 | static void | |
242 | hppaelf_finish () | |
243 | { | |
ffd6e9de | 244 | /* If generating a relocatable output file, then we don't |
4900fc06 AM |
245 | have to examine the relocs. */ |
246 | if (link_info.relocateable) | |
247 | return; | |
248 | ||
252b5132 | 249 | /* Call into the BFD backend to do the real work. */ |
25f72752 AM |
250 | if (! elf32_hppa_size_stubs (output_bfd, |
251 | stub_file->the_bfd, | |
41392f03 | 252 | &link_info, |
25f72752 | 253 | multi_subspace, |
47d89dba | 254 | group_size, |
41392f03 AM |
255 | &hppaelf_add_stub_section, |
256 | &hppaelf_layaout_sections_again)) | |
252b5132 RH |
257 | { |
258 | einfo ("%X%P: can not size stub section: %E\n"); | |
259 | return; | |
260 | } | |
4900fc06 | 261 | |
3231d22e AM |
262 | /* Set the global data pointer. */ |
263 | if (! elf32_hppa_set_gp (output_bfd, &link_info)) | |
264 | { | |
265 | einfo ("%X%P: can not set gp\n"); | |
266 | return; | |
267 | } | |
268 | ||
4900fc06 AM |
269 | /* Now build the linker stubs. */ |
270 | if (stub_file->the_bfd->sections != NULL) | |
252b5132 | 271 | { |
3231d22e | 272 | if (! elf32_hppa_build_stubs (&link_info)) |
4900fc06 AM |
273 | einfo ("%X%P: can not build stubs: %E\n"); |
274 | } | |
275 | } | |
276 | ||
3231d22e AM |
277 | |
278 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
279 | check_needed routines. */ | |
280 | ||
281 | static void hppa_for_each_input_file_wrapper | |
282 | PARAMS ((lang_input_statement_type *)); | |
283 | static void hppa_lang_for_each_input_file | |
284 | PARAMS ((void (*) (lang_input_statement_type *))); | |
285 | ||
286 | static void (*real_func) PARAMS ((lang_input_statement_type *)); | |
287 | ||
288 | static void hppa_for_each_input_file_wrapper (l) | |
289 | lang_input_statement_type *l; | |
290 | { | |
291 | if (l != stub_file) | |
292 | (*real_func) (l); | |
293 | } | |
294 | ||
295 | static void | |
296 | hppa_lang_for_each_input_file (func) | |
297 | void (*func) PARAMS ((lang_input_statement_type *)); | |
298 | { | |
299 | real_func = func; | |
300 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
301 | } | |
302 | ||
303 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
304 | ||
252b5132 RH |
305 | EOF |
306 | ||
3231d22e AM |
307 | # Define some shell vars to insert bits of code into the standard elf |
308 | # parse_args and list_options functions. | |
309 | # | |
310 | PARSE_AND_LIST_PROLOGUE=' | |
311 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 312 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
313 | ' |
314 | ||
47d89dba AM |
315 | # The options are repeated below so that no abbreviations are allowed. |
316 | # Otherwise -s matches stub-group-size | |
3231d22e | 317 | PARSE_AND_LIST_LONGOPTS=' |
47d89dba AM |
318 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
319 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, | |
320 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, | |
321 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, | |
3231d22e AM |
322 | ' |
323 | ||
324 | PARSE_AND_LIST_OPTIONS=' | |
325 | fprintf (file, _("\ | |
47d89dba AM |
326 | --multi-subspace Generate import and export stubs to support\n\ |
327 | multiple sub-space shared libraries\n" | |
328 | )); | |
329 | fprintf (file, _("\ | |
330 | --stub-group-size=N Maximum size of a group of input sections that can be\n\ | |
331 | handled by one stub section. A negative value\n\ | |
332 | locates all stubs before their branches (with a\n\ | |
333 | group size of -N), while a positive value allows\n\ | |
334 | two groups of input sections, one before, and one\n\ | |
335 | after each stub section. Values of +/-1 indicate\n\ | |
336 | the linker should choose suitable defaults." | |
3231d22e AM |
337 | )); |
338 | ' | |
339 | ||
340 | PARSE_AND_LIST_ARGS_CASES=' | |
341 | case OPTION_MULTI_SUBSPACE: | |
342 | multi_subspace = 1; | |
343 | break; | |
47d89dba AM |
344 | |
345 | case OPTION_STUBGROUP_SIZE: | |
346 | { | |
347 | const char *end; | |
348 | group_size = bfd_scan_vma (optarg, &end, 0); | |
349 | if (*end) | |
350 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
351 | } | |
352 | break; | |
3231d22e AM |
353 | ' |
354 | ||
355 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 356 | # |
ffd6e9de | 357 | LDEMUL_AFTER_PARSE=hppaelf_after_parse |
41392f03 AM |
358 | LDEMUL_FINISH=hppaelf_finish |
359 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |