Commit | Line | Data |
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252b5132 | 1 | /* FR30-specific support for 32-bit ELF. |
7898deda | 2 | Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include "bfd.h" | |
21 | #include "sysdep.h" | |
22 | #include "libbfd.h" | |
23 | #include "elf-bfd.h" | |
24 | #include "elf/fr30.h" | |
25 | ||
26 | /* Forward declarations. */ | |
27 | static bfd_reloc_status_type fr30_elf_i20_reloc | |
28 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
29 | static bfd_reloc_status_type fr30_elf_i32_reloc | |
30 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
31 | static reloc_howto_type * fr30_reloc_type_lookup | |
32 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
6609fa74 | 33 | static void fr30_info_to_howto_rela |
252b5132 | 34 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); |
6609fa74 | 35 | static boolean fr30_elf_relocate_section |
252b5132 RH |
36 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
37 | static bfd_reloc_status_type fr30_final_link_relocate | |
38 | PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma)); | |
39 | static boolean fr30_elf_gc_sweep_hook | |
40 | PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); | |
41 | static asection * fr30_elf_gc_mark_hook | |
42 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
43 | ||
44 | static reloc_howto_type fr30_elf_howto_table [] = | |
45 | { | |
46 | /* This reloc does nothing. */ | |
47 | HOWTO (R_FR30_NONE, /* type */ | |
48 | 0, /* rightshift */ | |
49 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
50 | 32, /* bitsize */ | |
51 | false, /* pc_relative */ | |
52 | 0, /* bitpos */ | |
53 | complain_overflow_bitfield, /* complain_on_overflow */ | |
54 | bfd_elf_generic_reloc, /* special_function */ | |
55 | "R_FR30_NONE", /* name */ | |
56 | false, /* partial_inplace */ | |
57 | 0, /* src_mask */ | |
58 | 0, /* dst_mask */ | |
59 | false), /* pcrel_offset */ | |
60 | ||
61 | /* An 8 bit absolute relocation. */ | |
62 | HOWTO (R_FR30_8, /* type */ | |
63 | 0, /* rightshift */ | |
64 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
65 | 8, /* bitsize */ | |
66 | false, /* pc_relative */ | |
67 | 4, /* bitpos */ | |
68 | complain_overflow_bitfield, /* complain_on_overflow */ | |
69 | bfd_elf_generic_reloc, /* special_function */ | |
70 | "R_FR30_8", /* name */ | |
71 | true, /* partial_inplace */ | |
72 | 0x0000, /* src_mask */ | |
73 | 0x0ff0, /* dst_mask */ | |
74 | false), /* pcrel_offset */ | |
75 | ||
76 | /* A 20 bit absolute relocation. */ | |
77 | HOWTO (R_FR30_20, /* type */ | |
78 | 0, /* rightshift */ | |
79 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
80 | 20, /* bitsize */ | |
81 | false, /* pc_relative */ | |
82 | 0, /* bitpos */ | |
83 | complain_overflow_bitfield, /* complain_on_overflow */ | |
84 | fr30_elf_i20_reloc, /* special_function */ | |
85 | "R_FR30_20", /* name */ | |
86 | true, /* partial_inplace */ | |
87 | 0x00000000, /* src_mask */ | |
88 | 0x00f0ffff, /* dst_mask */ | |
89 | false), /* pcrel_offset */ | |
90 | ||
91 | /* A 32 bit absolute relocation. */ | |
92 | HOWTO (R_FR30_32, /* type */ | |
93 | 0, /* rightshift */ | |
94 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
95 | 32, /* bitsize */ | |
96 | false, /* pc_relative */ | |
97 | 0, /* bitpos */ | |
98 | complain_overflow_bitfield, /* complain_on_overflow */ | |
99 | bfd_elf_generic_reloc, /* special_function */ | |
100 | "R_FR30_32", /* name */ | |
101 | true, /* partial_inplace */ | |
102 | 0x00000000, /* src_mask */ | |
103 | 0xffffffff, /* dst_mask */ | |
104 | false), /* pcrel_offset */ | |
105 | ||
106 | /* A 32 bit into 48 bits absolute relocation. */ | |
107 | HOWTO (R_FR30_48, /* type */ | |
108 | 0, /* rightshift */ | |
109 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
110 | 32, /* bitsize */ | |
111 | false, /* pc_relative */ | |
112 | 0, /* bitpos */ | |
113 | complain_overflow_bitfield, /* complain_on_overflow */ | |
114 | fr30_elf_i32_reloc, /* special_function */ | |
115 | "R_FR30_48", /* name */ | |
116 | true, /* partial_inplace */ | |
117 | 0x00000000, /* src_mask */ | |
118 | 0xffffffff, /* dst_mask */ | |
119 | false), /* pcrel_offset */ | |
120 | ||
121 | /* A 6 bit absolute relocation. */ | |
122 | HOWTO (R_FR30_6_IN_4, /* type */ | |
123 | 2, /* rightshift */ | |
124 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
125 | 6, /* bitsize */ | |
126 | false, /* pc_relative */ | |
127 | 4, /* bitpos */ | |
128 | complain_overflow_unsigned, /* complain_on_overflow */ | |
129 | bfd_elf_generic_reloc, /* special_function */ | |
130 | "R_FR30_6_IN_4", /* name */ | |
131 | true, /* partial_inplace */ | |
132 | 0x0000, /* src_mask */ | |
133 | 0x00f0, /* dst_mask */ | |
134 | false), /* pcrel_offset */ | |
6609fa74 | 135 | |
252b5132 RH |
136 | /* An 8 bit absolute relocation. */ |
137 | HOWTO (R_FR30_8_IN_8, /* type */ | |
138 | 0, /* rightshift */ | |
139 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
140 | 8, /* bitsize */ | |
141 | false, /* pc_relative */ | |
142 | 4, /* bitpos */ | |
143 | complain_overflow_signed, /* complain_on_overflow */ | |
144 | bfd_elf_generic_reloc,/* special_function */ | |
145 | "R_FR30_8_IN_8", /* name */ | |
146 | true, /* partial_inplace */ | |
147 | 0x0000, /* src_mask */ | |
148 | 0x0ff0, /* dst_mask */ | |
149 | false), /* pcrel_offset */ | |
6609fa74 | 150 | |
252b5132 RH |
151 | /* A 9 bit absolute relocation. */ |
152 | HOWTO (R_FR30_9_IN_8, /* type */ | |
153 | 1, /* rightshift */ | |
154 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
155 | 9, /* bitsize */ | |
156 | false, /* pc_relative */ | |
157 | 4, /* bitpos */ | |
158 | complain_overflow_signed, /* complain_on_overflow */ | |
159 | bfd_elf_generic_reloc,/* special_function */ | |
160 | "R_FR30_9_IN_8", /* name */ | |
161 | true, /* partial_inplace */ | |
162 | 0x0000, /* src_mask */ | |
163 | 0x0ff0, /* dst_mask */ | |
164 | false), /* pcrel_offset */ | |
6609fa74 | 165 | |
252b5132 RH |
166 | /* A 10 bit absolute relocation. */ |
167 | HOWTO (R_FR30_10_IN_8, /* type */ | |
168 | 2, /* rightshift */ | |
169 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
170 | 10, /* bitsize */ | |
171 | false, /* pc_relative */ | |
172 | 4, /* bitpos */ | |
173 | complain_overflow_signed, /* complain_on_overflow */ | |
174 | bfd_elf_generic_reloc,/* special_function */ | |
175 | "R_FR30_10_IN_8", /* name */ | |
176 | true, /* partial_inplace */ | |
177 | 0x0000, /* src_mask */ | |
178 | 0x0ff0, /* dst_mask */ | |
179 | false), /* pcrel_offset */ | |
180 | ||
181 | /* A PC relative 9 bit relocation, right shifted by 1. */ | |
182 | HOWTO (R_FR30_9_PCREL, /* type */ | |
183 | 1, /* rightshift */ | |
184 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
185 | 9, /* bitsize */ | |
186 | true, /* pc_relative */ | |
187 | 0, /* bitpos */ | |
188 | complain_overflow_signed, /* complain_on_overflow */ | |
189 | bfd_elf_generic_reloc, /* special_function */ | |
190 | "R_FR30_9_PCREL", /* name */ | |
191 | false, /* partial_inplace */ | |
192 | 0x0000, /* src_mask */ | |
193 | 0x00ff, /* dst_mask */ | |
194 | false), /* pcrel_offset */ | |
195 | ||
196 | /* A PC relative 12 bit relocation, right shifted by 1. */ | |
197 | HOWTO (R_FR30_12_PCREL, /* type */ | |
198 | 1, /* rightshift */ | |
199 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
200 | 12, /* bitsize */ | |
201 | true, /* pc_relative */ | |
202 | 0, /* bitpos */ | |
203 | complain_overflow_signed, /* complain_on_overflow */ | |
204 | bfd_elf_generic_reloc, /* special_function */ | |
205 | "R_FR30_12_PCREL", /* name */ | |
206 | false, /* partial_inplace */ | |
207 | 0x0000, /* src_mask */ | |
208 | 0x07ff, /* dst_mask */ | |
209 | false), /* pcrel_offset */ | |
210 | /* GNU extension to record C++ vtable hierarchy */ | |
211 | HOWTO (R_FR30_GNU_VTINHERIT, /* type */ | |
212 | 0, /* rightshift */ | |
213 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
214 | 0, /* bitsize */ | |
215 | false, /* pc_relative */ | |
216 | 0, /* bitpos */ | |
217 | complain_overflow_dont, /* complain_on_overflow */ | |
218 | NULL, /* special_function */ | |
219 | "R_FR30_GNU_VTINHERIT", /* name */ | |
220 | false, /* partial_inplace */ | |
221 | 0, /* src_mask */ | |
222 | 0, /* dst_mask */ | |
223 | false), /* pcrel_offset */ | |
224 | ||
225 | /* GNU extension to record C++ vtable member usage */ | |
226 | HOWTO (R_FR30_GNU_VTENTRY, /* type */ | |
227 | 0, /* rightshift */ | |
228 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
229 | 0, /* bitsize */ | |
230 | false, /* pc_relative */ | |
231 | 0, /* bitpos */ | |
232 | complain_overflow_dont, /* complain_on_overflow */ | |
233 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
234 | "R_FR30_GNU_VTENTRY", /* name */ | |
235 | false, /* partial_inplace */ | |
236 | 0, /* src_mask */ | |
237 | 0, /* dst_mask */ | |
238 | false), /* pcrel_offset */ | |
252b5132 RH |
239 | }; |
240 | \f | |
241 | /* Utility to actually perform an R_FR30_20 reloc. */ | |
242 | ||
243 | static bfd_reloc_status_type | |
244 | fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data, | |
245 | input_section, output_bfd, error_message) | |
246 | bfd * abfd; | |
247 | arelent * reloc_entry; | |
248 | asymbol * symbol; | |
249 | PTR data; | |
250 | asection * input_section; | |
251 | bfd * output_bfd; | |
5f771d47 | 252 | char ** error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
253 | { |
254 | bfd_vma relocation; | |
255 | unsigned long x; | |
6609fa74 | 256 | |
252b5132 RH |
257 | /* This part is from bfd_elf_generic_reloc. */ |
258 | if (output_bfd != (bfd *) NULL | |
259 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
260 | && (! reloc_entry->howto->partial_inplace | |
261 | || reloc_entry->addend == 0)) | |
262 | { | |
263 | reloc_entry->address += input_section->output_offset; | |
264 | return bfd_reloc_ok; | |
265 | } | |
266 | ||
267 | if (output_bfd != NULL) | |
268 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
269 | return bfd_reloc_ok; | |
270 | ||
271 | relocation = | |
272 | symbol->value | |
273 | + symbol->section->output_section->vma | |
274 | + symbol->section->output_offset | |
275 | + reloc_entry->addend; | |
276 | ||
fc633e5b | 277 | if (relocation > (((bfd_vma) 1 << 20) - 1)) |
252b5132 RH |
278 | return bfd_reloc_overflow; |
279 | ||
23ccc829 | 280 | x = bfd_get_32 (abfd, (char *) data + reloc_entry->address); |
252b5132 | 281 | x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); |
23ccc829 | 282 | bfd_put_32 (abfd, x, (char *) data + reloc_entry->address); |
252b5132 RH |
283 | |
284 | return bfd_reloc_ok; | |
285 | } | |
252b5132 RH |
286 | \f |
287 | /* Utility to actually perform a R_FR30_48 reloc. */ | |
288 | ||
289 | static bfd_reloc_status_type | |
290 | fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data, | |
291 | input_section, output_bfd, error_message) | |
292 | bfd * abfd; | |
293 | arelent * reloc_entry; | |
294 | asymbol * symbol; | |
295 | PTR data; | |
296 | asection * input_section; | |
297 | bfd * output_bfd; | |
5f771d47 | 298 | char ** error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
299 | { |
300 | bfd_vma relocation; | |
301 | ||
302 | /* This part is from bfd_elf_generic_reloc. */ | |
303 | if (output_bfd != (bfd *) NULL | |
304 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
305 | && (! reloc_entry->howto->partial_inplace | |
306 | || reloc_entry->addend == 0)) | |
307 | { | |
308 | reloc_entry->address += input_section->output_offset; | |
309 | return bfd_reloc_ok; | |
310 | } | |
311 | ||
312 | if (output_bfd != NULL) | |
313 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
314 | return bfd_reloc_ok; | |
315 | ||
316 | relocation = | |
317 | symbol->value | |
318 | + symbol->section->output_section->vma | |
319 | + symbol->section->output_offset | |
320 | + reloc_entry->addend; | |
321 | ||
23ccc829 | 322 | bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2); |
252b5132 RH |
323 | |
324 | return bfd_reloc_ok; | |
325 | } | |
326 | \f | |
327 | /* Map BFD reloc types to FR30 ELF reloc types. */ | |
328 | ||
329 | struct fr30_reloc_map | |
330 | { | |
331 | bfd_reloc_code_real_type bfd_reloc_val; | |
332 | unsigned int fr30_reloc_val; | |
333 | }; | |
334 | ||
335 | static const struct fr30_reloc_map fr30_reloc_map [] = | |
336 | { | |
337 | { BFD_RELOC_NONE, R_FR30_NONE }, | |
338 | { BFD_RELOC_8, R_FR30_8 }, | |
339 | { BFD_RELOC_FR30_20, R_FR30_20 }, | |
340 | { BFD_RELOC_32, R_FR30_32 }, | |
341 | { BFD_RELOC_FR30_48, R_FR30_48 }, | |
342 | { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 }, | |
343 | { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 }, | |
344 | { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 }, | |
345 | { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 }, | |
346 | { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL }, | |
347 | { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL }, | |
348 | { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT }, | |
349 | { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY }, | |
350 | }; | |
351 | ||
352 | static reloc_howto_type * | |
353 | fr30_reloc_type_lookup (abfd, code) | |
5f771d47 | 354 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
355 | bfd_reloc_code_real_type code; |
356 | { | |
357 | unsigned int i; | |
358 | ||
359 | for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]); | |
360 | --i;) | |
361 | if (fr30_reloc_map [i].bfd_reloc_val == code) | |
362 | return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val]; | |
6609fa74 | 363 | |
252b5132 RH |
364 | return NULL; |
365 | } | |
366 | ||
367 | /* Set the howto pointer for an FR30 ELF reloc. */ | |
368 | ||
369 | static void | |
370 | fr30_info_to_howto_rela (abfd, cache_ptr, dst) | |
5f771d47 | 371 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
372 | arelent * cache_ptr; |
373 | Elf32_Internal_Rela * dst; | |
374 | { | |
375 | unsigned int r_type; | |
376 | ||
377 | r_type = ELF32_R_TYPE (dst->r_info); | |
378 | BFD_ASSERT (r_type < (unsigned int) R_FR30_max); | |
379 | cache_ptr->howto = & fr30_elf_howto_table [r_type]; | |
380 | } | |
381 | \f | |
382 | /* Perform a single relocation. By default we use the standard BFD | |
383 | routines, but a few relocs, we have to do them ourselves. */ | |
384 | ||
385 | static bfd_reloc_status_type | |
386 | fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation) | |
387 | reloc_howto_type * howto; | |
388 | bfd * input_bfd; | |
389 | asection * input_section; | |
390 | bfd_byte * contents; | |
391 | Elf_Internal_Rela * rel; | |
392 | bfd_vma relocation; | |
393 | { | |
394 | bfd_reloc_status_type r = bfd_reloc_ok; | |
395 | bfd_vma x; | |
396 | bfd_signed_vma srel; | |
6609fa74 | 397 | |
252b5132 RH |
398 | switch (howto->type) |
399 | { | |
400 | case R_FR30_20: | |
401 | contents += rel->r_offset; | |
402 | relocation += rel->r_addend; | |
403 | ||
404 | if (relocation > ((1 << 20) - 1)) | |
405 | return bfd_reloc_overflow; | |
6609fa74 | 406 | |
252b5132 RH |
407 | x = bfd_get_32 (input_bfd, contents); |
408 | x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); | |
409 | bfd_put_32 (input_bfd, x, contents); | |
410 | break; | |
6609fa74 | 411 | |
252b5132 RH |
412 | case R_FR30_48: |
413 | contents += rel->r_offset + 2; | |
414 | relocation += rel->r_addend; | |
415 | bfd_put_32 (input_bfd, relocation, contents); | |
416 | break; | |
417 | ||
418 | case R_FR30_9_PCREL: | |
419 | contents += rel->r_offset + 1; | |
420 | srel = (bfd_signed_vma) relocation; | |
421 | srel += rel->r_addend; | |
422 | srel -= rel->r_offset; | |
6609fa74 | 423 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
252b5132 RH |
424 | srel -= (input_section->output_section->vma + |
425 | input_section->output_offset); | |
6609fa74 | 426 | |
252b5132 RH |
427 | if (srel & 1) |
428 | return bfd_reloc_outofrange; | |
429 | if (srel > ((1 << 8) - 1) || (srel < - (1 << 8))) | |
430 | return bfd_reloc_overflow; | |
431 | ||
432 | bfd_put_8 (input_bfd, srel >> 1, contents); | |
433 | break; | |
434 | ||
435 | case R_FR30_12_PCREL: | |
436 | contents += rel->r_offset; | |
437 | srel = (bfd_signed_vma) relocation; | |
438 | srel += rel->r_addend; | |
439 | srel -= rel->r_offset; | |
6609fa74 | 440 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
252b5132 RH |
441 | srel -= (input_section->output_section->vma + |
442 | input_section->output_offset); | |
6609fa74 | 443 | |
252b5132 RH |
444 | if (srel & 1) |
445 | return bfd_reloc_outofrange; | |
446 | if (srel > ((1 << 11) - 1) || (srel < - (1 << 11))) | |
447 | return bfd_reloc_overflow; | |
6609fa74 | 448 | |
252b5132 RH |
449 | x = bfd_get_16 (input_bfd, contents); |
450 | x = (x & 0xf800) | ((srel >> 1) & 0x7ff); | |
451 | bfd_put_16 (input_bfd, x, contents); | |
452 | break; | |
453 | ||
454 | default: | |
455 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
456 | contents, rel->r_offset, | |
457 | relocation, rel->r_addend); | |
458 | } | |
459 | ||
460 | return r; | |
461 | } | |
252b5132 RH |
462 | \f |
463 | /* Relocate an FR30 ELF section. | |
464 | There is some attempt to make this function usable for many architectures, | |
465 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], | |
466 | if only to serve as a learning tool. | |
467 | ||
468 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
469 | to handle the relocations for a section. | |
470 | ||
471 | The relocs are always passed as Rela structures; if the section | |
472 | actually uses Rel structures, the r_addend field will always be | |
473 | zero. | |
474 | ||
475 | This function is responsible for adjusting the section contents as | |
476 | necessary, and (if using Rela relocs and generating a relocateable | |
477 | output file) adjusting the reloc addend as necessary. | |
478 | ||
479 | This function does not have to worry about setting the reloc | |
480 | address or the reloc symbol index. | |
481 | ||
482 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
483 | ||
484 | LOCAL_SECTIONS is an array giving the section in the input file | |
485 | corresponding to the st_shndx field of each local symbol. | |
486 | ||
487 | The global hash table entry for the global symbols can be found | |
488 | via elf_sym_hashes (input_bfd). | |
489 | ||
490 | When generating relocateable output, this function must handle | |
491 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
492 | going to be the section symbol corresponding to the output | |
493 | section, which means that the addend must be adjusted | |
494 | accordingly. */ | |
495 | ||
496 | static boolean | |
497 | fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
498 | contents, relocs, local_syms, local_sections) | |
5f771d47 | 499 | bfd * output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
500 | struct bfd_link_info * info; |
501 | bfd * input_bfd; | |
502 | asection * input_section; | |
503 | bfd_byte * contents; | |
504 | Elf_Internal_Rela * relocs; | |
505 | Elf_Internal_Sym * local_syms; | |
506 | asection ** local_sections; | |
507 | { | |
508 | Elf_Internal_Shdr * symtab_hdr; | |
509 | struct elf_link_hash_entry ** sym_hashes; | |
510 | Elf_Internal_Rela * rel; | |
511 | Elf_Internal_Rela * relend; | |
512 | ||
513 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
514 | sym_hashes = elf_sym_hashes (input_bfd); | |
515 | relend = relocs + input_section->reloc_count; | |
516 | ||
517 | for (rel = relocs; rel < relend; rel ++) | |
518 | { | |
519 | reloc_howto_type * howto; | |
520 | unsigned long r_symndx; | |
521 | Elf_Internal_Sym * sym; | |
522 | asection * sec; | |
523 | struct elf_link_hash_entry * h; | |
524 | bfd_vma relocation; | |
525 | bfd_reloc_status_type r; | |
526 | const char * name = NULL; | |
527 | int r_type; | |
6609fa74 | 528 | |
252b5132 | 529 | r_type = ELF32_R_TYPE (rel->r_info); |
6609fa74 | 530 | |
252b5132 RH |
531 | if ( r_type == R_FR30_GNU_VTINHERIT |
532 | || r_type == R_FR30_GNU_VTENTRY) | |
533 | continue; | |
6609fa74 | 534 | |
252b5132 RH |
535 | r_symndx = ELF32_R_SYM (rel->r_info); |
536 | ||
537 | if (info->relocateable) | |
538 | { | |
539 | /* This is a relocateable link. We don't have to change | |
540 | anything, unless the reloc is against a section symbol, | |
541 | in which case we have to adjust according to where the | |
542 | section symbol winds up in the output section. */ | |
543 | if (r_symndx < symtab_hdr->sh_info) | |
544 | { | |
545 | sym = local_syms + r_symndx; | |
6609fa74 | 546 | |
252b5132 RH |
547 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
548 | { | |
549 | sec = local_sections [r_symndx]; | |
550 | rel->r_addend += sec->output_offset + sym->st_value; | |
551 | } | |
552 | } | |
553 | ||
554 | continue; | |
555 | } | |
556 | ||
557 | /* This is a final link. */ | |
558 | howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info); | |
559 | h = NULL; | |
560 | sym = NULL; | |
561 | sec = NULL; | |
6609fa74 | 562 | |
252b5132 RH |
563 | if (r_symndx < symtab_hdr->sh_info) |
564 | { | |
565 | sym = local_syms + r_symndx; | |
566 | sec = local_sections [r_symndx]; | |
567 | relocation = (sec->output_section->vma | |
568 | + sec->output_offset | |
569 | + sym->st_value); | |
6609fa74 | 570 | |
252b5132 RH |
571 | name = bfd_elf_string_from_elf_section |
572 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
573 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
574 | #if 0 | |
575 | fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", | |
576 | sec->name, name, sym->st_name, | |
577 | sec->output_section->vma, sec->output_offset, | |
578 | sym->st_value, rel->r_addend); | |
579 | #endif | |
580 | } | |
581 | else | |
582 | { | |
583 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
6609fa74 | 584 | |
252b5132 RH |
585 | while (h->root.type == bfd_link_hash_indirect |
586 | || h->root.type == bfd_link_hash_warning) | |
587 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
588 | ||
589 | name = h->root.root.string; | |
6609fa74 | 590 | |
252b5132 RH |
591 | if (h->root.type == bfd_link_hash_defined |
592 | || h->root.type == bfd_link_hash_defweak) | |
593 | { | |
594 | sec = h->root.u.def.section; | |
595 | relocation = (h->root.u.def.value | |
596 | + sec->output_section->vma | |
597 | + sec->output_offset); | |
598 | #if 0 | |
599 | fprintf (stderr, | |
600 | "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", | |
601 | sec->name, name, h->root.u.def.value, | |
602 | sec->output_section->vma, sec->output_offset, relocation); | |
603 | #endif | |
604 | } | |
605 | else if (h->root.type == bfd_link_hash_undefweak) | |
606 | { | |
607 | #if 0 | |
608 | fprintf (stderr, "undefined: sec: %s, name: %s\n", | |
609 | sec->name, name); | |
610 | #endif | |
611 | relocation = 0; | |
612 | } | |
613 | else | |
614 | { | |
615 | if (! ((*info->callbacks->undefined_symbol) | |
616 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 617 | input_section, rel->r_offset, true))) |
252b5132 RH |
618 | return false; |
619 | #if 0 | |
620 | fprintf (stderr, "unknown: name: %s\n", name); | |
621 | #endif | |
622 | relocation = 0; | |
623 | } | |
624 | } | |
6609fa74 | 625 | |
252b5132 RH |
626 | r = fr30_final_link_relocate (howto, input_bfd, input_section, |
627 | contents, rel, relocation); | |
628 | ||
629 | if (r != bfd_reloc_ok) | |
630 | { | |
631 | const char * msg = (const char *) NULL; | |
632 | ||
633 | switch (r) | |
634 | { | |
635 | case bfd_reloc_overflow: | |
636 | r = info->callbacks->reloc_overflow | |
637 | (info, name, howto->name, (bfd_vma) 0, | |
638 | input_bfd, input_section, rel->r_offset); | |
639 | break; | |
6609fa74 | 640 | |
252b5132 RH |
641 | case bfd_reloc_undefined: |
642 | r = info->callbacks->undefined_symbol | |
5cc7c785 L |
643 | (info, name, input_bfd, input_section, rel->r_offset, |
644 | true); | |
252b5132 | 645 | break; |
6609fa74 | 646 | |
252b5132 RH |
647 | case bfd_reloc_outofrange: |
648 | msg = _("internal error: out of range error"); | |
649 | break; | |
650 | ||
651 | case bfd_reloc_notsupported: | |
652 | msg = _("internal error: unsupported relocation error"); | |
653 | break; | |
654 | ||
655 | case bfd_reloc_dangerous: | |
656 | msg = _("internal error: dangerous relocation"); | |
657 | break; | |
658 | ||
659 | default: | |
660 | msg = _("internal error: unknown error"); | |
661 | break; | |
662 | } | |
663 | ||
664 | if (msg) | |
665 | r = info->callbacks->warning | |
666 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
667 | ||
668 | if (! r) | |
669 | return false; | |
670 | } | |
671 | } | |
672 | ||
673 | return true; | |
674 | } | |
675 | \f | |
676 | /* Return the section that should be marked against GC for a given | |
677 | relocation. */ | |
678 | ||
679 | static asection * | |
680 | fr30_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
681 | bfd * abfd; | |
5f771d47 | 682 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
252b5132 RH |
683 | Elf_Internal_Rela * rel; |
684 | struct elf_link_hash_entry * h; | |
685 | Elf_Internal_Sym * sym; | |
686 | { | |
687 | if (h != NULL) | |
688 | { | |
689 | switch (ELF32_R_TYPE (rel->r_info)) | |
690 | { | |
691 | case R_FR30_GNU_VTINHERIT: | |
692 | case R_FR30_GNU_VTENTRY: | |
693 | break; | |
694 | ||
695 | default: | |
696 | switch (h->root.type) | |
697 | { | |
698 | case bfd_link_hash_defined: | |
699 | case bfd_link_hash_defweak: | |
700 | return h->root.u.def.section; | |
701 | ||
702 | case bfd_link_hash_common: | |
703 | return h->root.u.c.p->section; | |
e049a0de ILT |
704 | |
705 | default: | |
706 | break; | |
252b5132 RH |
707 | } |
708 | } | |
709 | } | |
710 | else | |
711 | { | |
712 | if (!(elf_bad_symtab (abfd) | |
713 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
714 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
715 | && sym->st_shndx != SHN_COMMON)) | |
716 | { | |
717 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
718 | } | |
719 | } | |
720 | ||
721 | return NULL; | |
722 | } | |
723 | ||
724 | /* Update the got entry reference counts for the section being removed. */ | |
725 | ||
726 | static boolean | |
727 | fr30_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
5f771d47 ILT |
728 | bfd * abfd ATTRIBUTE_UNUSED; |
729 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
730 | asection * sec ATTRIBUTE_UNUSED; | |
731 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED; | |
252b5132 RH |
732 | { |
733 | return true; | |
734 | } | |
735 | ||
736 | /* Look through the relocs for a section during the first phase. | |
737 | Since we don't do .gots or .plts, we just need to consider the | |
738 | virtual table relocs for gc. */ | |
6609fa74 | 739 | |
252b5132 RH |
740 | static boolean |
741 | fr30_elf_check_relocs (abfd, info, sec, relocs) | |
742 | bfd *abfd; | |
743 | struct bfd_link_info *info; | |
744 | asection *sec; | |
745 | const Elf_Internal_Rela *relocs; | |
746 | { | |
747 | Elf_Internal_Shdr *symtab_hdr; | |
748 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
749 | const Elf_Internal_Rela *rel; | |
750 | const Elf_Internal_Rela *rel_end; | |
6609fa74 | 751 | |
252b5132 RH |
752 | if (info->relocateable) |
753 | return true; | |
6609fa74 | 754 | |
252b5132 RH |
755 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
756 | sym_hashes = elf_sym_hashes (abfd); | |
6609fa74 | 757 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
252b5132 RH |
758 | if (!elf_bad_symtab (abfd)) |
759 | sym_hashes_end -= symtab_hdr->sh_info; | |
6609fa74 | 760 | |
252b5132 RH |
761 | rel_end = relocs + sec->reloc_count; |
762 | for (rel = relocs; rel < rel_end; rel++) | |
763 | { | |
764 | struct elf_link_hash_entry *h; | |
765 | unsigned long r_symndx; | |
6609fa74 | 766 | |
252b5132 RH |
767 | r_symndx = ELF32_R_SYM (rel->r_info); |
768 | if (r_symndx < symtab_hdr->sh_info) | |
769 | h = NULL; | |
770 | else | |
771 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
6609fa74 | 772 | |
252b5132 RH |
773 | switch (ELF32_R_TYPE (rel->r_info)) |
774 | { | |
775 | /* This relocation describes the C++ object vtable hierarchy. | |
776 | Reconstruct it for later use during GC. */ | |
777 | case R_FR30_GNU_VTINHERIT: | |
778 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
779 | return false; | |
780 | break; | |
6609fa74 | 781 | |
252b5132 RH |
782 | /* This relocation describes which C++ vtable entries are actually |
783 | used. Record for later use during GC. */ | |
784 | case R_FR30_GNU_VTENTRY: | |
785 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
786 | return false; | |
787 | break; | |
788 | } | |
789 | } | |
6609fa74 | 790 | |
252b5132 RH |
791 | return true; |
792 | } | |
793 | \f | |
794 | #define ELF_ARCH bfd_arch_fr30 | |
795 | #define ELF_MACHINE_CODE EM_CYGNUS_FR30 | |
796 | #define ELF_MAXPAGESIZE 0x1000 | |
797 | ||
798 | #define TARGET_BIG_SYM bfd_elf32_fr30_vec | |
799 | #define TARGET_BIG_NAME "elf32-fr30" | |
800 | ||
801 | #define elf_info_to_howto_rel NULL | |
802 | #define elf_info_to_howto fr30_info_to_howto_rela | |
803 | #define elf_backend_relocate_section fr30_elf_relocate_section | |
804 | #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook | |
805 | #define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook | |
806 | #define elf_backend_check_relocs fr30_elf_check_relocs | |
807 | ||
808 | #define elf_backend_can_gc_sections 1 | |
809 | ||
810 | #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup | |
811 | ||
812 | #include "elf32-target.h" |