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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
41392f03 AM |
2 | # Copyright (C) 1991, 93, 94, 95, 97, 99, 2000 |
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 | |
4900fc06 AM |
30 | static void hppaelf_set_output_arch PARAMS ((void)); |
31 | static void hppaelf_create_output_section_statements PARAMS ((void)); | |
32 | static void hppaelf_delete_padding_statements | |
41392f03 AM |
33 | PARAMS ((lang_statement_list_type *)); |
34 | static asection *hppaelf_add_stub_section | |
35 | PARAMS ((const char *, asection *)); | |
36 | static void hppaelf_layaout_sections_again PARAMS ((void)); | |
4900fc06 | 37 | static void hppaelf_finish PARAMS ((void)); |
252b5132 RH |
38 | |
39 | ||
4900fc06 AM |
40 | /* Fake input file for stubs. */ |
41 | static lang_input_statement_type *stub_file; | |
252b5132 | 42 | |
252b5132 RH |
43 | |
44 | /* Set the output architecture and machine. */ | |
45 | ||
46 | static void | |
41392f03 | 47 | hppaelf_set_output_arch () |
252b5132 RH |
48 | { |
49 | unsigned long machine = 0; | |
50 | ||
51 | bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine); | |
52 | } | |
53 | ||
54 | /* This is called before the input files are opened. We create a new | |
4900fc06 | 55 | fake input file to hold the stub sections. */ |
252b5132 RH |
56 | |
57 | static void | |
58 | hppaelf_create_output_section_statements () | |
59 | { | |
60 | stub_file = lang_add_input_file ("linker stubs", | |
61 | lang_input_file_is_fake_enum, | |
62 | NULL); | |
63 | stub_file->the_bfd = bfd_create ("linker stubs", output_bfd); | |
64 | if (stub_file->the_bfd == NULL | |
65 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
66 | bfd_get_arch (output_bfd), | |
67 | bfd_get_mach (output_bfd))) | |
68 | { | |
69 | einfo ("%X%P: can not create BFD %E\n"); | |
70 | return; | |
71 | } | |
72 | ||
252b5132 RH |
73 | ldlang_add_file (stub_file); |
74 | } | |
75 | ||
4900fc06 | 76 | /* Walk all the lang statements splicing out any padding statements from |
252b5132 RH |
77 | the list. */ |
78 | ||
79 | static void | |
4900fc06 AM |
80 | hppaelf_delete_padding_statements (list) |
81 | lang_statement_list_type *list; | |
252b5132 | 82 | { |
4900fc06 AM |
83 | lang_statement_union_type *s; |
84 | lang_statement_union_type **ps; | |
85 | for (ps = &list->head; (s = *ps) != NULL; ps = &s->next) | |
252b5132 RH |
86 | { |
87 | switch (s->header.type) | |
88 | { | |
89 | ||
4900fc06 | 90 | /* We want to recursively walk these sections. */ |
252b5132 | 91 | case lang_constructors_statement_enum: |
4900fc06 | 92 | hppaelf_delete_padding_statements (&constructor_list); |
252b5132 RH |
93 | break; |
94 | ||
95 | case lang_output_section_statement_enum: | |
4900fc06 AM |
96 | hppaelf_delete_padding_statements (&s->output_section_statement.children); |
97 | break; | |
98 | ||
99 | case lang_group_statement_enum: | |
100 | hppaelf_delete_padding_statements (&s->group_statement.children); | |
252b5132 RH |
101 | break; |
102 | ||
252b5132 | 103 | case lang_wild_statement_enum: |
4900fc06 | 104 | hppaelf_delete_padding_statements (&s->wild_statement.children); |
252b5132 RH |
105 | break; |
106 | ||
107 | /* Here's what we are really looking for. Splice these out of | |
108 | the list. */ | |
109 | case lang_padding_statement_enum: | |
4900fc06 AM |
110 | *ps = s->next; |
111 | if (*ps == NULL) | |
112 | list->tail = ps; | |
252b5132 RH |
113 | break; |
114 | ||
115 | /* We don't care about these cases. */ | |
116 | case lang_data_statement_enum: | |
117 | case lang_object_symbols_statement_enum: | |
118 | case lang_output_statement_enum: | |
119 | case lang_target_statement_enum: | |
120 | case lang_input_section_enum: | |
121 | case lang_input_statement_enum: | |
122 | case lang_assignment_statement_enum: | |
123 | case lang_address_statement_enum: | |
124 | break; | |
125 | ||
126 | default: | |
127 | abort (); | |
128 | break; | |
129 | } | |
252b5132 RH |
130 | } |
131 | } | |
132 | ||
4900fc06 AM |
133 | |
134 | struct hook_stub_info | |
135 | { | |
136 | lang_statement_list_type add; | |
137 | asection *input_section; | |
138 | }; | |
139 | ||
140 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
141 | ||
41392f03 AM |
142 | static boolean hook_in_stub |
143 | PARAMS ((struct hook_stub_info *, lang_statement_union_type **)); | |
144 | ||
4900fc06 AM |
145 | static boolean |
146 | hook_in_stub (info, lp) | |
147 | struct hook_stub_info *info; | |
148 | lang_statement_union_type **lp; | |
149 | { | |
150 | lang_statement_union_type *l; | |
151 | boolean ret; | |
152 | ||
153 | for (; (l = *lp) != NULL; lp = &l->next) | |
154 | { | |
155 | switch (l->header.type) | |
156 | { | |
157 | case lang_constructors_statement_enum: | |
158 | ret = hook_in_stub (info, &constructor_list.head); | |
159 | if (ret) | |
160 | return ret; | |
161 | break; | |
162 | ||
163 | case lang_output_section_statement_enum: | |
164 | ret = hook_in_stub (info, | |
165 | &l->output_section_statement.children.head); | |
166 | if (ret) | |
167 | return ret; | |
168 | break; | |
169 | ||
170 | case lang_wild_statement_enum: | |
171 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
172 | if (ret) | |
173 | return ret; | |
174 | break; | |
175 | ||
176 | case lang_group_statement_enum: | |
177 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
178 | if (ret) | |
179 | return ret; | |
180 | break; | |
181 | ||
182 | case lang_input_section_enum: | |
183 | if (l->input_section.section == info->input_section) | |
184 | { | |
185 | /* We've found our section. Insert the stub immediately | |
186 | before its associated input section. */ | |
187 | *lp = info->add.head; | |
188 | *(info->add.tail) = l; | |
189 | return true; | |
190 | } | |
191 | break; | |
192 | ||
193 | case lang_data_statement_enum: | |
194 | case lang_reloc_statement_enum: | |
195 | case lang_object_symbols_statement_enum: | |
196 | case lang_output_statement_enum: | |
197 | case lang_target_statement_enum: | |
198 | case lang_input_statement_enum: | |
199 | case lang_assignment_statement_enum: | |
200 | case lang_padding_statement_enum: | |
201 | case lang_address_statement_enum: | |
202 | case lang_fill_statement_enum: | |
203 | break; | |
204 | ||
205 | default: | |
206 | FAIL (); | |
207 | break; | |
208 | } | |
209 | } | |
210 | return false; | |
211 | } | |
212 | ||
41392f03 | 213 | |
4900fc06 AM |
214 | /* Call-back for elf32_hppa_size_stubs. */ |
215 | ||
216 | /* Create a new stub section, and arrange for it to be linked | |
217 | immediately before INPUT_SECTION. */ | |
218 | ||
219 | static asection * | |
220 | hppaelf_add_stub_section (stub_name, input_section) | |
221 | const char *stub_name; | |
222 | asection *input_section; | |
223 | { | |
224 | asection *stub_sec; | |
225 | flagword flags; | |
226 | asection *output_section; | |
227 | const char *secname; | |
228 | lang_output_section_statement_type *os; | |
229 | struct hook_stub_info info; | |
230 | ||
231 | stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_name); | |
232 | if (stub_sec == NULL) | |
233 | goto err_ret; | |
234 | ||
235 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
236 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); | |
237 | if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags)) | |
238 | goto err_ret; | |
239 | ||
240 | output_section = input_section->output_section; | |
241 | secname = bfd_get_section_name (output_section->owner, output_section); | |
242 | os = lang_output_section_find (secname); | |
243 | ||
244 | info.input_section = input_section; | |
245 | lang_list_init (&info.add); | |
246 | wild_doit (&info.add, stub_sec, os, stub_file); | |
247 | ||
248 | if (info.add.head == NULL) | |
249 | goto err_ret; | |
250 | ||
251 | if (hook_in_stub (&info, &os->children.head)) | |
252 | return stub_sec; | |
253 | ||
254 | err_ret: | |
255 | einfo ("%X%P: can not make stub section: %E\n"); | |
256 | return NULL; | |
257 | } | |
258 | ||
41392f03 | 259 | |
4900fc06 AM |
260 | /* Another call-back for elf32_hppa_size_stubs. */ |
261 | ||
262 | static void | |
263 | hppaelf_layaout_sections_again () | |
264 | { | |
265 | /* If we have changed sizes of the stub sections, then we need | |
266 | to recalculate all the section offsets. This may mean we need to | |
267 | add even more stubs. */ | |
268 | ||
269 | /* Delete all the padding statements, they're no longer valid. */ | |
270 | hppaelf_delete_padding_statements (stat_ptr); | |
271 | ||
272 | /* Resize the sections. */ | |
273 | lang_size_sections (stat_ptr->head, abs_output_section, | |
274 | &stat_ptr->head, 0, (bfd_vma) 0, false); | |
275 | ||
276 | /* Redo special stuff. */ | |
277 | ldemul_after_allocation (); | |
278 | ||
279 | /* Do the assignments again. */ | |
280 | lang_do_assignments (stat_ptr->head, abs_output_section, | |
281 | (fill_type) 0, (bfd_vma) 0); | |
282 | } | |
283 | ||
284 | ||
252b5132 RH |
285 | /* Final emulation specific call. For the PA we use this opportunity |
286 | to build linker stubs. */ | |
287 | ||
288 | static void | |
289 | hppaelf_finish () | |
290 | { | |
4900fc06 AM |
291 | /* If generating a relocateable output file, then we don't |
292 | have to examine the relocs. */ | |
293 | if (link_info.relocateable) | |
294 | return; | |
295 | ||
252b5132 | 296 | /* Call into the BFD backend to do the real work. */ |
41392f03 AM |
297 | if (! elf32_hppa_size_stubs (stub_file->the_bfd, |
298 | &link_info, | |
299 | &hppaelf_add_stub_section, | |
300 | &hppaelf_layaout_sections_again)) | |
252b5132 RH |
301 | { |
302 | einfo ("%X%P: can not size stub section: %E\n"); | |
303 | return; | |
304 | } | |
4900fc06 AM |
305 | |
306 | /* Now build the linker stubs. */ | |
307 | if (stub_file->the_bfd->sections != NULL) | |
252b5132 | 308 | { |
41392f03 | 309 | if (! elf32_hppa_build_stubs (stub_file->the_bfd, &link_info)) |
4900fc06 AM |
310 | einfo ("%X%P: can not build stubs: %E\n"); |
311 | } | |
312 | } | |
313 | ||
252b5132 RH |
314 | EOF |
315 | ||
41392f03 AM |
316 | # Put these routines in ld_${EMULATION_NAME}_emulation |
317 | # | |
318 | LDEMUL_SET_OUTPUT_ARCH=hppaelf_set_output_arch | |
319 | LDEMUL_FINISH=hppaelf_finish | |
320 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |