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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., 675 Mass Ave, Cambridge, MA 02139, 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 "config.h" | |
32 | #include "ldmain.h" | |
33 | #include "ldemul.h" | |
34 | #include "ldfile.h" | |
35 | #include "ldmisc.h" | |
36 | ||
37 | static void gldmipsidt_before_parse PARAMS ((void)); | |
38 | static void gldmipsidt_after_open PARAMS ((void)); | |
39 | static void check_sections PARAMS ((bfd *, asection *, PTR)); | |
40 | static void gldmipsidt_after_allocation PARAMS ((void)); | |
41 | static char *gldmipsidt_get_script PARAMS ((int *isfile)); | |
42 | ||
43 | static void | |
44 | gldmipsidt_before_parse() | |
45 | { | |
46 | #ifndef TARGET_ /* I.e., if not generic. */ | |
47 | ldfile_output_architecture = bfd_arch_mips; | |
48 | #endif /* not TARGET_ */ | |
49 | } | |
50 | ||
51 | /* This function is run after all the input files have been opened. | |
52 | We create a .rel.sdata section for each input file with a non zero | |
53 | .sdata section. The BFD backend will fill in these sections with | |
54 | magic numbers which can be used to relocate the data section at run | |
55 | time. This will only do the right thing if all the input files | |
56 | have been compiled using -membedded-pic. */ | |
57 | ||
58 | static void | |
59 | gldmipsidt_after_open () | |
60 | { | |
61 | bfd *abfd; | |
62 | ||
63 | if (! command_line.embedded_relocs | |
64 | || link_info.relocateable) | |
65 | return; | |
66 | ||
67 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) | |
68 | { | |
69 | asection *datasec; | |
70 | ||
71 | datasec = bfd_get_section_by_name (abfd, ".sdata"); | |
72 | ||
73 | /* Note that we assume that the reloc_count field has already | |
74 | been set up. We could call bfd_get_reloc_upper_bound, but | |
75 | that returns the size of a memory buffer rather than a reloc | |
76 | count. We do not want to call bfd_canonicalize_reloc, | |
77 | because although it would always work it would force us to | |
78 | read in the relocs into BFD canonical form, which would waste | |
79 | a significant amount of time and memory. */ | |
80 | if (datasec != NULL && datasec->reloc_count > 0) | |
81 | { | |
82 | asection *relsec; | |
83 | ||
84 | relsec = bfd_make_section (abfd, ".rel.sdata"); | |
85 | if (relsec == NULL | |
86 | || ! bfd_set_section_flags (abfd, relsec, | |
87 | (SEC_ALLOC | |
88 | | SEC_LOAD | |
89 | | SEC_HAS_CONTENTS | |
90 | | SEC_IN_MEMORY)) | |
91 | || ! bfd_set_section_alignment (abfd, relsec, 2) | |
92 | || ! bfd_set_section_size (abfd, relsec, | |
93 | datasec->reloc_count * 4)) | |
94 | einfo ("%F%B: can not create .rel.sdata section: %E"); | |
95 | } | |
96 | ||
97 | /* Double check that all other data sections are empty, as is | |
98 | required for embedded PIC code. */ | |
99 | bfd_map_over_sections (abfd, check_sections, (PTR) datasec); | |
100 | } | |
101 | } | |
102 | ||
103 | /* Check that of the data sections, only the .sdata section has | |
104 | relocs. This is called via bfd_map_over_sections. */ | |
105 | ||
106 | static void | |
107 | check_sections (abfd, sec, sdatasec) | |
108 | bfd *abfd; | |
109 | asection *sec; | |
110 | PTR sdatasec; | |
111 | { | |
112 | if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0 | |
113 | && sec != (asection *) sdatasec | |
114 | && sec->reloc_count != 0) | |
115 | einfo ("%F%X: section %s has relocs; can not use --embedded-relocs", | |
116 | abfd, bfd_get_section_name (abfd, sec)); | |
117 | } | |
118 | ||
119 | /* This function is called after the section sizes and offsets have | |
120 | been set. If we are generating embedded relocs, it calls a special | |
121 | BFD backend routine to do the work. */ | |
122 | ||
123 | static void | |
124 | gldmipsidt_after_allocation () | |
125 | { | |
126 | bfd *abfd; | |
127 | ||
128 | if (! command_line.embedded_relocs | |
129 | || link_info.relocateable) | |
130 | return; | |
131 | ||
132 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) | |
133 | { | |
134 | asection *datasec, *relsec; | |
135 | char *errmsg; | |
136 | ||
137 | datasec = bfd_get_section_by_name (abfd, ".sdata"); | |
138 | ||
139 | if (datasec == NULL || datasec->reloc_count == 0) | |
140 | continue; | |
141 | ||
142 | relsec = bfd_get_section_by_name (abfd, ".rel.sdata"); | |
143 | ASSERT (relsec != NULL); | |
144 | ||
145 | if (! bfd_mips_ecoff_create_embedded_relocs (abfd, &link_info, | |
146 | datasec, relsec, | |
147 | &errmsg)) | |
148 | { | |
149 | if (errmsg == NULL) | |
150 | einfo ("%B%X: can not create runtime reloc information: %E", | |
151 | abfd); | |
152 | else | |
153 | einfo ("%X%B: can not create runtime reloc information: %s", | |
154 | abfd, errmsg); | |
155 | } | |
156 | } | |
157 | } | |
158 | ||
159 | static char * | |
160 | gldmipsidt_get_script(isfile) | |
161 | int *isfile; | |
162 | { | |
163 | *isfile = 0; | |
164 | ||
165 | if (link_info.relocateable == true && config.build_constructors == true) | |
166 | return | |
167 | concat( | |
168 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
169 | \"ecoff-littlemips\")\n\ | |
170 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
171 | ENTRY(start)\n\ | |
172 | SECTIONS\n\ | |
173 | {\n\ | |
174 | .text : {\n\ | |
175 | ;\n\ | |
176 | *(.init)\n\ | |
177 | ;\n\ | |
178 | *(.text)\n\ | |
179 | *(.rel.sdata)\n\ | |
180 | *(.fini)\n\ | |
181 | ;\n\ | |
182 | ;\n\ | |
183 | }\n\ | |
184 | "," .rdata : {\n\ | |
185 | *(.rdata)\n\ | |
186 | }\n\ | |
187 | .data : {\n\ | |
188 | *(.data)\n\ | |
189 | CONSTRUCTORS\n\ | |
190 | }\n\ | |
191 | .lit8 : {\n\ | |
192 | *(.lit8)\n\ | |
193 | }\n\ | |
194 | .lit4 : {\n\ | |
195 | *(.lit4)\n\ | |
196 | }\n\ | |
197 | "," .sdata : {\n\ | |
198 | *(.sdata)\n\ | |
199 | }\n\ | |
200 | .sbss : {\n\ | |
201 | *(.sbss)\n\ | |
202 | *(.scommon)\n\ | |
203 | }\n\ | |
204 | .bss : {\n\ | |
205 | *(.bss)\n\ | |
206 | *(COMMON)\n\ | |
207 | }\n\ | |
208 | }\n\n", NULL) | |
209 | ; else if (link_info.relocateable == true) return | |
210 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
211 | \"ecoff-littlemips\")\n\ | |
212 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
213 | ENTRY(start)\n\ | |
214 | SECTIONS\n\ | |
215 | {\n\ | |
216 | .text : {\n\ | |
217 | ;\n\ | |
218 | *(.init)\n\ | |
219 | ;\n\ | |
220 | *(.text)\n\ | |
221 | *(.rel.sdata)\n\ | |
222 | *(.fini)\n\ | |
223 | ;\n\ | |
224 | ;\n\ | |
225 | }\n\ | |
226 | .rdata : {\n\ | |
227 | *(.rdata)\n\ | |
228 | }\n\ | |
229 | .data : {\n\ | |
230 | *(.data)\n\ | |
231 | }\n\ | |
232 | .lit8 : {\n\ | |
233 | *(.lit8)\n\ | |
234 | }\n\ | |
235 | .lit4 : {\n\ | |
236 | *(.lit4)\n\ | |
237 | }\n\ | |
238 | .sdata : {\n\ | |
239 | *(.sdata)\n\ | |
240 | }\n\ | |
241 | .sbss : {\n\ | |
242 | *(.sbss)\n\ | |
243 | *(.scommon)\n\ | |
244 | }\n\ | |
245 | .bss : {\n\ | |
246 | *(.bss)\n\ | |
247 | *(COMMON)\n\ | |
248 | }\n\ | |
249 | }\n\n" | |
250 | ; else if (!config.text_read_only) return | |
251 | concat( | |
252 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
253 | \"ecoff-littlemips\")\n\ | |
254 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
255 | ENTRY(start)\n\ | |
256 | SECTIONS\n\ | |
257 | {\n\ | |
258 | . = 0xa0012000;\n\ | |
259 | .text : {\n\ | |
260 | _ftext = . ;\n\ | |
261 | *(.init)\n\ | |
262 | eprol = .;\n\ | |
263 | *(.text)\n\ | |
264 | PROVIDE (__runtime_reloc_start = .);\n\ | |
265 | *(.rel.sdata)\n\ | |
266 | PROVIDE (__runtime_reloc_stop = .);\n\ | |
267 | *(.fini)\n\ | |
268 | etext = .;\n\ | |
269 | _etext = .;\n\ | |
270 | "," }\n\ | |
271 | . = .;\n\ | |
272 | .rdata : {\n\ | |
273 | *(.rdata)\n\ | |
274 | }\n\ | |
275 | _fdata = ALIGN(16);\n\ | |
276 | .data : {\n\ | |
277 | *(.data)\n\ | |
278 | CONSTRUCTORS\n\ | |
279 | }\n\ | |
280 | _gp = ALIGN(16) + 0x8000;\n\ | |
281 | .lit8 : {\n\ | |
282 | *(.lit8)\n\ | |
283 | }\n\ | |
284 | .lit4 : {\n\ | |
285 | *(.lit4)\n\ | |
286 | }\n\ | |
287 | .sdata : {\n\ | |
288 | *(.sdata)\n\ | |
289 | }\n\ | |
290 | "," edata = .;\n\ | |
291 | _edata = .;\n\ | |
292 | _fbss = .;\n\ | |
293 | .sbss : {\n\ | |
294 | *(.sbss)\n\ | |
295 | *(.scommon)\n\ | |
296 | }\n\ | |
297 | .bss : {\n\ | |
298 | *(.bss)\n\ | |
299 | *(COMMON)\n\ | |
300 | }\n\ | |
301 | end = .;\n\ | |
302 | _end = .;\n\ | |
303 | }\n\n" | |
304 | , NULL) | |
305 | ; else if (!config.magic_demand_paged) return | |
306 | concat ( | |
307 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
308 | \"ecoff-littlemips\")\n\ | |
309 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
310 | ENTRY(start)\n\ | |
311 | SECTIONS\n\ | |
312 | {\n\ | |
313 | . = 0xa0012000;\n\ | |
314 | .text : {\n\ | |
315 | _ftext = . ;\n\ | |
316 | *(.init)\n\ | |
317 | eprol = .;\n\ | |
318 | *(.text)\n\ | |
319 | PROVIDE (__runtime_reloc_start = .);\n\ | |
320 | *(.rel.sdata)\n\ | |
321 | PROVIDE (__runtime_reloc_stop = .);\n\ | |
322 | *(.fini)\n\ | |
323 | etext = .;\n\ | |
324 | _etext = .;\n\ | |
325 | "," }\n\ | |
326 | . = .;\n\ | |
327 | .rdata : {\n\ | |
328 | *(.rdata)\n\ | |
329 | }\n\ | |
330 | _fdata = ALIGN(16);\n\ | |
331 | .data : {\n\ | |
332 | *(.data)\n\ | |
333 | CONSTRUCTORS\n\ | |
334 | }\n\ | |
335 | _gp = ALIGN(16) + 0x8000;\n\ | |
336 | .lit8 : {\n\ | |
337 | *(.lit8)\n\ | |
338 | "," }\n\ | |
339 | .lit4 : {\n\ | |
340 | *(.lit4)\n\ | |
341 | }\n\ | |
342 | .sdata : {\n\ | |
343 | *(.sdata)\n\ | |
344 | }\n\ | |
345 | edata = .;\n\ | |
346 | _edata = .;\n\ | |
347 | _fbss = .;\n\ | |
348 | .sbss : {\n\ | |
349 | *(.sbss)\n\ | |
350 | *(.scommon)\n\ | |
351 | "," }\n\ | |
352 | .bss : {\n\ | |
353 | *(.bss)\n\ | |
354 | *(COMMON)\n\ | |
355 | }\n\ | |
356 | end = .;\n\ | |
357 | _end = .;\n\ | |
358 | }\n\n" | |
359 | , NULL) | |
360 | ; else return | |
361 | concat ( | |
362 | "OUTPUT_FORMAT(\"ecoff-bigmips\", \"ecoff-bigmips\",\n\ | |
363 | \"ecoff-littlemips\")\n\ | |
364 | SEARCH_DIR(/usr/local/mips-idt-ecoff/lib);\n\ | |
365 | ENTRY(start)\n\ | |
366 | SECTIONS\n\ | |
367 | {\n\ | |
368 | . = 0xa0012000;\n\ | |
369 | .text : {\n\ | |
370 | _ftext = . ;\n\ | |
371 | *(.init)\n\ | |
372 | eprol = .;\n\ | |
373 | *(.text)\n\ | |
374 | PROVIDE (__runtime_reloc_start = .);\n\ | |
375 | *(.rel.sdata)\n\ | |
376 | PROVIDE (__runtime_reloc_stop = .);\n\ | |
377 | *(.fini)\n\ | |
378 | etext = .;\n\ | |
379 | _etext = .;\n\ | |
380 | "," }\n\ | |
381 | . = .;\n\ | |
382 | .rdata : {\n\ | |
383 | *(.rdata)\n\ | |
384 | }\n\ | |
385 | _fdata = ALIGN(16);\n\ | |
386 | .data : {\n\ | |
387 | *(.data)\n\ | |
388 | CONSTRUCTORS\n\ | |
389 | }\n\ | |
390 | _gp = ALIGN(16) + 0x8000;\n\ | |
391 | .lit8 : {\n\ | |
392 | *(.lit8)\n\ | |
393 | }\n\ | |
394 | .lit4 : {\n\ | |
395 | *(.lit4)\n\ | |
396 | "," }\n\ | |
397 | .sdata : {\n\ | |
398 | *(.sdata)\n\ | |
399 | }\n\ | |
400 | edata = .;\n\ | |
401 | _edata = .;\n\ | |
402 | _fbss = .;\n\ | |
403 | .sbss : {\n\ | |
404 | *(.sbss)\n\ | |
405 | *(.scommon)\n\ | |
406 | }\n\ | |
407 | .bss : {\n\ | |
408 | *(.bss)\n\ | |
409 | *(COMMON)\n\ | |
410 | }\n\ | |
411 | end = .;\n\ | |
412 | _end = .;\n\ | |
413 | }\n\n" | |
414 | , NULL) | |
415 | ; } | |
416 | ||
417 | struct ld_emulation_xfer_struct ld_mipsidt_emulation = | |
418 | { | |
419 | gldmipsidt_before_parse, | |
420 | syslib_default, | |
421 | hll_default, | |
422 | after_parse_default, | |
423 | gldmipsidt_after_open, | |
424 | gldmipsidt_after_allocation, | |
425 | set_output_arch_default, | |
426 | ldemul_default_target, | |
427 | before_allocation_default, | |
428 | gldmipsidt_get_script, | |
429 | "mipsidt", | |
430 | "ecoff-bigmips" | |
431 | }; |