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1 | /* This file is is generated by a shell script. DO NOT EDIT! */ |
2 | ||
3 | /* Handle embedded relocs for MIPS. | |
4 | Copyright 1994 Free Software Foundation, Inc. | |
5 | Written by Ian Lance Taylor <[email protected]> based on generic.em. | |
6 | ||
7 | This file is part of GLD, the Gnu Linker. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #define TARGET_IS_mipsidt | |
24 | ||
25 | #include "libiberty.h" | |
26 | #include "bfd.h" | |
27 | #include "sysdep.h" | |
28 | #include "bfdlink.h" | |
29 | ||
30 | #include "ld.h" | |
31 | #include "ldmain.h" | |
32 | #include "ldemul.h" | |
33 | #include "ldfile.h" | |
34 | #include "ldmisc.h" | |
35 | ||
36 | static void gldmipsidt_before_parse PARAMS ((void)); | |
37 | static void gldmipsidt_after_open PARAMS ((void)); | |
38 | static void check_sections PARAMS ((bfd *, asection *, PTR)); | |
39 | static void gldmipsidt_after_allocation PARAMS ((void)); | |
40 | static char *gldmipsidt_get_script PARAMS ((int *isfile)); | |
41 | ||
42 | static void | |
43 | gldmipsidt_before_parse() | |
44 | { | |
45 | #ifndef TARGET_ /* I.e., if not generic. */ | |
46 | ldfile_output_architecture = bfd_arch_mips; | |
47 | #endif /* not TARGET_ */ | |
48 | } | |
49 | ||
50 | /* This function is run after all the input files have been opened. | |
51 | We create a .rel.sdata section for each input file with a non zero | |
52 | .sdata section. The BFD backend will fill in these sections with | |
53 | magic numbers which can be used to relocate the data section at run | |
54 | time. This will only do the right thing if all the input files | |
55 | have been compiled using -membedded-pic. */ | |
56 | ||
57 | static void | |
58 | gldmipsidt_after_open () | |
59 | { | |
60 | bfd *abfd; | |
61 | ||
62 | if (! command_line.embedded_relocs | |
63 | || link_info.relocateable) | |
64 | return; | |
65 | ||
66 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) | |
67 | { | |
68 | asection *datasec; | |
69 | ||
70 | datasec = bfd_get_section_by_name (abfd, ".sdata"); | |
71 | ||
72 | /* Note that we assume that the reloc_count field has already | |
73 | been set up. We could call bfd_get_reloc_upper_bound, but | |
74 | that returns the size of a memory buffer rather than a reloc | |
75 | count. We do not want to call bfd_canonicalize_reloc, | |
76 | because although it would always work it would force us to | |
77 | read in the relocs into BFD canonical form, which would waste | |
78 | a significant amount of time and memory. */ | |
79 | if (datasec != NULL && datasec->reloc_count > 0) | |
80 | { | |
81 | asection *relsec; | |
82 | ||
83 | relsec = bfd_make_section (abfd, ".rel.sdata"); | |
84 | if (relsec == NULL | |
85 | || ! bfd_set_section_flags (abfd, relsec, | |
86 | (SEC_ALLOC | |
87 | | SEC_LOAD | |
88 | | SEC_HAS_CONTENTS | |
89 | | SEC_IN_MEMORY)) | |
90 | || ! bfd_set_section_alignment (abfd, relsec, 2) | |
91 | || ! bfd_set_section_size (abfd, relsec, | |
92 | datasec->reloc_count * 4)) | |
93 | einfo (_("%F%B: can not create .rel.sdata section: %E\n")); | |
94 | } | |
95 | ||
96 | /* Double check that all other data sections are empty, as is | |
97 | required for embedded PIC code. */ | |
98 | bfd_map_over_sections (abfd, check_sections, (PTR) datasec); | |
99 | } | |
100 | } | |
101 | ||
102 | /* Check that of the data sections, only the .sdata section has | |
103 | relocs. This is called via bfd_map_over_sections. */ | |
104 | ||
105 | static void | |
106 | check_sections (abfd, sec, sdatasec) | |
107 | bfd *abfd; | |
108 | asection *sec; | |
109 | PTR sdatasec; | |
110 | { | |
111 | if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0 | |
112 | && sec != (asection *) sdatasec | |
113 | && sec->reloc_count != 0) | |
114 | einfo (_("%F%X: section %s has relocs; can not use --embedded-relocs\n"), | |
115 | abfd, bfd_get_section_name (abfd, sec)); | |
116 | } | |
117 | ||
118 | /* This function is called after the section sizes and offsets have | |
119 | been set. If we are generating embedded relocs, it calls a special | |
120 | BFD backend routine to do the work. */ | |
121 | ||
122 | static void | |
123 | gldmipsidt_after_allocation () | |
124 | { | |
125 | bfd *abfd; | |
126 | ||
127 | if (! command_line.embedded_relocs | |
128 | || link_info.relocateable) | |
129 | return; | |
130 | ||
131 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) | |
132 | { | |
133 | asection *datasec, *relsec; | |
134 | char *errmsg; | |
135 | ||
136 | datasec = bfd_get_section_by_name (abfd, ".sdata"); | |
137 | ||
138 | if (datasec == NULL || datasec->reloc_count == 0) | |
139 | continue; | |
140 | ||
141 | relsec = bfd_get_section_by_name (abfd, ".rel.sdata"); | |
142 | ASSERT (relsec != NULL); | |
143 | ||
144 | if (! bfd_mips_ecoff_create_embedded_relocs (abfd, &link_info, | |
145 | datasec, relsec, | |
146 | &errmsg)) | |
147 | { | |
148 | if (errmsg == NULL) | |
149 | einfo (_("%B%X: can not create runtime reloc information: %E\n"), | |
150 | abfd); | |
151 | else | |
152 | einfo (_("%X%B: can not create runtime reloc information: %s\n"), | |
153 | abfd, errmsg); | |
154 | } | |
155 | } | |
156 | } | |
157 | ||
158 | static char * | |
159 | gldmipsidt_get_script(isfile) | |
160 | int *isfile; | |
161 | { | |
162 | *isfile = 0; | |
163 | ||
164 | if (link_info.relocateable == true && config.build_constructors == true) | |
165 | return | |
166 | concat( | |
167 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
168 | \"ecoff-littlemips\")\n\ | |
169 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
170 | ENTRY(start)\n\ | |
171 | SECTIONS\n\ | |
172 | {\n\ | |
173 | .text : {\n\ | |
174 | ;\n\ | |
175 | *(.init)\n\ | |
176 | ;\n\ | |
177 | *(.text)\n\ | |
178 | *(.rel.sdata)\n\ | |
179 | *(.fini)\n\ | |
180 | ;\n\ | |
181 | ;\n\ | |
182 | }\n\ | |
183 | "," .rdata : {\n\ | |
184 | *(.rdata)\n\ | |
185 | }\n\ | |
186 | .data : {\n\ | |
187 | *(.data)\n\ | |
188 | CONSTRUCTORS\n\ | |
189 | }\n\ | |
190 | .lit8 : {\n\ | |
191 | *(.lit8)\n\ | |
192 | }\n\ | |
193 | .lit4 : {\n\ | |
194 | *(.lit4)\n\ | |
195 | }\n\ | |
196 | "," .sdata : {\n\ | |
197 | *(.sdata)\n\ | |
198 | }\n\ | |
199 | .sbss : {\n\ | |
200 | *(.sbss)\n\ | |
201 | *(.scommon)\n\ | |
202 | }\n\ | |
203 | .bss : {\n\ | |
204 | *(.bss)\n\ | |
205 | *(COMMON)\n\ | |
206 | }\n\ | |
207 | }\n\n", NULL) | |
208 | ; else if (link_info.relocateable == true) return | |
209 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
210 | \"ecoff-littlemips\")\n\ | |
211 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
212 | ENTRY(start)\n\ | |
213 | SECTIONS\n\ | |
214 | {\n\ | |
215 | .text : {\n\ | |
216 | ;\n\ | |
217 | *(.init)\n\ | |
218 | ;\n\ | |
219 | *(.text)\n\ | |
220 | *(.rel.sdata)\n\ | |
221 | *(.fini)\n\ | |
222 | ;\n\ | |
223 | ;\n\ | |
224 | }\n\ | |
225 | .rdata : {\n\ | |
226 | *(.rdata)\n\ | |
227 | }\n\ | |
228 | .data : {\n\ | |
229 | *(.data)\n\ | |
230 | }\n\ | |
231 | .lit8 : {\n\ | |
232 | *(.lit8)\n\ | |
233 | }\n\ | |
234 | .lit4 : {\n\ | |
235 | *(.lit4)\n\ | |
236 | }\n\ | |
237 | .sdata : {\n\ | |
238 | *(.sdata)\n\ | |
239 | }\n\ | |
240 | .sbss : {\n\ | |
241 | *(.sbss)\n\ | |
242 | *(.scommon)\n\ | |
243 | }\n\ | |
244 | .bss : {\n\ | |
245 | *(.bss)\n\ | |
246 | *(COMMON)\n\ | |
247 | }\n\ | |
248 | }\n\n" | |
249 | ; else if (!config.text_read_only) return | |
250 | concat( | |
251 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
252 | \"ecoff-littlemips\")\n\ | |
253 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
254 | ENTRY(start)\n\ | |
255 | SECTIONS\n\ | |
256 | {\n\ | |
257 | . = 0xa0012000;\n\ | |
258 | .text : {\n\ | |
259 | _ftext = . ;\n\ | |
260 | *(.init)\n\ | |
261 | eprol = .;\n\ | |
262 | *(.text)\n\ | |
263 | PROVIDE (__runtime_reloc_start = .);\n\ | |
264 | *(.rel.sdata)\n\ | |
265 | PROVIDE (__runtime_reloc_stop = .);\n\ | |
266 | *(.fini)\n\ | |
267 | etext = .;\n\ | |
268 | _etext = .;\n\ | |
269 | "," }\n\ | |
270 | . = .;\n\ | |
271 | .rdata : {\n\ | |
272 | *(.rdata)\n\ | |
273 | }\n\ | |
274 | _fdata = ALIGN(16);\n\ | |
275 | .data : {\n\ | |
276 | *(.data)\n\ | |
277 | CONSTRUCTORS\n\ | |
278 | }\n\ | |
279 | _gp = ALIGN(16) + 0x8000;\n\ | |
280 | .lit8 : {\n\ | |
281 | *(.lit8)\n\ | |
282 | }\n\ | |
283 | .lit4 : {\n\ | |
284 | *(.lit4)\n\ | |
285 | }\n\ | |
286 | .sdata : {\n\ | |
287 | *(.sdata)\n\ | |
288 | }\n\ | |
289 | "," edata = .;\n\ | |
290 | _edata = .;\n\ | |
291 | _fbss = .;\n\ | |
292 | .sbss : {\n\ | |
293 | *(.sbss)\n\ | |
294 | *(.scommon)\n\ | |
295 | }\n\ | |
296 | .bss : {\n\ | |
297 | *(.bss)\n\ | |
298 | *(COMMON)\n\ | |
299 | }\n\ | |
300 | end = .;\n\ | |
301 | _end = .;\n\ | |
302 | }\n\n" | |
303 | , NULL) | |
304 | ; else if (!config.magic_demand_paged) return | |
305 | concat ( | |
306 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
307 | \"ecoff-littlemips\")\n\ | |
308 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
309 | ENTRY(start)\n\ | |
310 | SECTIONS\n\ | |
311 | {\n\ | |
312 | . = 0xa0012000;\n\ | |
313 | .text : {\n\ | |
314 | _ftext = . ;\n\ | |
315 | *(.init)\n\ | |
316 | eprol = .;\n\ | |
317 | *(.text)\n\ | |
318 | PROVIDE (__runtime_reloc_start = .);\n\ | |
319 | *(.rel.sdata)\n\ | |
320 | PROVIDE (__runtime_reloc_stop = .);\n\ | |
321 | *(.fini)\n\ | |
322 | etext = .;\n\ | |
323 | _etext = .;\n\ | |
324 | "," }\n\ | |
325 | . = .;\n\ | |
326 | .rdata : {\n\ | |
327 | *(.rdata)\n\ | |
328 | }\n\ | |
329 | _fdata = ALIGN(16);\n\ | |
330 | .data : {\n\ | |
331 | *(.data)\n\ | |
332 | CONSTRUCTORS\n\ | |
333 | }\n\ | |
334 | _gp = ALIGN(16) + 0x8000;\n\ | |
335 | .lit8 : {\n\ | |
336 | *(.lit8)\n\ | |
337 | "," }\n\ | |
338 | .lit4 : {\n\ | |
339 | *(.lit4)\n\ | |
340 | }\n\ | |
341 | .sdata : {\n\ | |
342 | *(.sdata)\n\ | |
343 | }\n\ | |
344 | edata = .;\n\ | |
345 | _edata = .;\n\ | |
346 | _fbss = .;\n\ | |
347 | .sbss : {\n\ | |
348 | *(.sbss)\n\ | |
349 | *(.scommon)\n\ | |
350 | "," }\n\ | |
351 | .bss : {\n\ | |
352 | *(.bss)\n\ | |
353 | *(COMMON)\n\ | |
354 | }\n\ | |
355 | end = .;\n\ | |
356 | _end = .;\n\ | |
357 | }\n\n" | |
358 | , NULL) | |
359 | ; else return | |
360 | concat ( | |
361 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
362 | \"ecoff-littlemips\")\n\ | |
363 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
364 | ENTRY(start)\n\ | |
365 | SECTIONS\n\ | |
366 | {\n\ | |
367 | . = 0xa0012000;\n\ | |
368 | .text : {\n\ | |
369 | _ftext = . ;\n\ | |
370 | *(.init)\n\ | |
371 | eprol = .;\n\ | |
372 | *(.text)\n\ | |
373 | PROVIDE (__runtime_reloc_start = .);\n\ | |
374 | *(.rel.sdata)\n\ | |
375 | PROVIDE (__runtime_reloc_stop = .);\n\ | |
376 | *(.fini)\n\ | |
377 | etext = .;\n\ | |
378 | _etext = .;\n\ | |
379 | "," }\n\ | |
380 | . = .;\n\ | |
381 | .rdata : {\n\ | |
382 | *(.rdata)\n\ | |
383 | }\n\ | |
384 | _fdata = ALIGN(16);\n\ | |
385 | .data : {\n\ | |
386 | *(.data)\n\ | |
387 | CONSTRUCTORS\n\ | |
388 | }\n\ | |
389 | _gp = ALIGN(16) + 0x8000;\n\ | |
390 | .lit8 : {\n\ | |
391 | *(.lit8)\n\ | |
392 | }\n\ | |
393 | .lit4 : {\n\ | |
394 | *(.lit4)\n\ | |
395 | "," }\n\ | |
396 | .sdata : {\n\ | |
397 | *(.sdata)\n\ | |
398 | }\n\ | |
399 | edata = .;\n\ | |
400 | _edata = .;\n\ | |
401 | _fbss = .;\n\ | |
402 | .sbss : {\n\ | |
403 | *(.sbss)\n\ | |
404 | *(.scommon)\n\ | |
405 | }\n\ | |
406 | .bss : {\n\ | |
407 | *(.bss)\n\ | |
408 | *(COMMON)\n\ | |
409 | }\n\ | |
410 | end = .;\n\ | |
411 | _end = .;\n\ | |
412 | }\n\n" | |
413 | , NULL) | |
414 | ; } | |
415 | ||
416 | struct ld_emulation_xfer_struct ld_mipsidt_emulation = | |
417 | { | |
418 | gldmipsidt_before_parse, | |
419 | syslib_default, | |
420 | hll_default, | |
421 | after_parse_default, | |
422 | gldmipsidt_after_open, | |
423 | gldmipsidt_after_allocation, | |
424 | set_output_arch_default, | |
425 | ldemul_default_target, | |
426 | before_allocation_default, | |
427 | gldmipsidt_get_script, | |
428 | "mipsidt", | |
429 | "ecoff-bigmips" | |
430 | }; |