Commit | Line | Data |
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252b5132 | 1 | /* FR30-specific support for 32-bit ELF. |
b491616a | 2 | Copyright 1998, 1999, 2000, 2001, 2002 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 |
dc810e39 AM |
36 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
37 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
252b5132 | 38 | static bfd_reloc_status_type fr30_final_link_relocate |
dc810e39 AM |
39 | PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, |
40 | Elf_Internal_Rela *, bfd_vma)); | |
252b5132 | 41 | static boolean fr30_elf_gc_sweep_hook |
dc810e39 AM |
42 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
43 | const Elf_Internal_Rela *)); | |
252b5132 | 44 | static asection * fr30_elf_gc_mark_hook |
dc810e39 AM |
45 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, |
46 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
47 | static boolean fr30_elf_check_relocs | |
48 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
49 | const Elf_Internal_Rela *)); | |
252b5132 RH |
50 | |
51 | static reloc_howto_type fr30_elf_howto_table [] = | |
52 | { | |
53 | /* This reloc does nothing. */ | |
54 | HOWTO (R_FR30_NONE, /* type */ | |
55 | 0, /* rightshift */ | |
56 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
57 | 32, /* bitsize */ | |
58 | false, /* pc_relative */ | |
59 | 0, /* bitpos */ | |
60 | complain_overflow_bitfield, /* complain_on_overflow */ | |
61 | bfd_elf_generic_reloc, /* special_function */ | |
62 | "R_FR30_NONE", /* name */ | |
63 | false, /* partial_inplace */ | |
64 | 0, /* src_mask */ | |
65 | 0, /* dst_mask */ | |
66 | false), /* pcrel_offset */ | |
67 | ||
68 | /* An 8 bit absolute relocation. */ | |
69 | HOWTO (R_FR30_8, /* type */ | |
70 | 0, /* rightshift */ | |
71 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
72 | 8, /* bitsize */ | |
73 | false, /* pc_relative */ | |
74 | 4, /* bitpos */ | |
75 | complain_overflow_bitfield, /* complain_on_overflow */ | |
76 | bfd_elf_generic_reloc, /* special_function */ | |
77 | "R_FR30_8", /* name */ | |
78 | true, /* partial_inplace */ | |
79 | 0x0000, /* src_mask */ | |
80 | 0x0ff0, /* dst_mask */ | |
81 | false), /* pcrel_offset */ | |
82 | ||
83 | /* A 20 bit absolute relocation. */ | |
84 | HOWTO (R_FR30_20, /* type */ | |
85 | 0, /* rightshift */ | |
86 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
87 | 20, /* bitsize */ | |
88 | false, /* pc_relative */ | |
89 | 0, /* bitpos */ | |
90 | complain_overflow_bitfield, /* complain_on_overflow */ | |
91 | fr30_elf_i20_reloc, /* special_function */ | |
92 | "R_FR30_20", /* name */ | |
93 | true, /* partial_inplace */ | |
94 | 0x00000000, /* src_mask */ | |
95 | 0x00f0ffff, /* dst_mask */ | |
96 | false), /* pcrel_offset */ | |
97 | ||
98 | /* A 32 bit absolute relocation. */ | |
99 | HOWTO (R_FR30_32, /* type */ | |
100 | 0, /* rightshift */ | |
101 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
102 | 32, /* bitsize */ | |
103 | false, /* pc_relative */ | |
104 | 0, /* bitpos */ | |
105 | complain_overflow_bitfield, /* complain_on_overflow */ | |
106 | bfd_elf_generic_reloc, /* special_function */ | |
107 | "R_FR30_32", /* name */ | |
108 | true, /* partial_inplace */ | |
109 | 0x00000000, /* src_mask */ | |
110 | 0xffffffff, /* dst_mask */ | |
111 | false), /* pcrel_offset */ | |
112 | ||
113 | /* A 32 bit into 48 bits absolute relocation. */ | |
114 | HOWTO (R_FR30_48, /* type */ | |
115 | 0, /* rightshift */ | |
116 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
117 | 32, /* bitsize */ | |
118 | false, /* pc_relative */ | |
119 | 0, /* bitpos */ | |
120 | complain_overflow_bitfield, /* complain_on_overflow */ | |
121 | fr30_elf_i32_reloc, /* special_function */ | |
122 | "R_FR30_48", /* name */ | |
123 | true, /* partial_inplace */ | |
124 | 0x00000000, /* src_mask */ | |
125 | 0xffffffff, /* dst_mask */ | |
126 | false), /* pcrel_offset */ | |
127 | ||
128 | /* A 6 bit absolute relocation. */ | |
129 | HOWTO (R_FR30_6_IN_4, /* type */ | |
130 | 2, /* rightshift */ | |
131 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
132 | 6, /* bitsize */ | |
133 | false, /* pc_relative */ | |
134 | 4, /* bitpos */ | |
135 | complain_overflow_unsigned, /* complain_on_overflow */ | |
136 | bfd_elf_generic_reloc, /* special_function */ | |
137 | "R_FR30_6_IN_4", /* name */ | |
138 | true, /* partial_inplace */ | |
139 | 0x0000, /* src_mask */ | |
140 | 0x00f0, /* dst_mask */ | |
141 | false), /* pcrel_offset */ | |
6609fa74 | 142 | |
252b5132 RH |
143 | /* An 8 bit absolute relocation. */ |
144 | HOWTO (R_FR30_8_IN_8, /* type */ | |
145 | 0, /* rightshift */ | |
146 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
147 | 8, /* bitsize */ | |
148 | false, /* pc_relative */ | |
149 | 4, /* bitpos */ | |
150 | complain_overflow_signed, /* complain_on_overflow */ | |
151 | bfd_elf_generic_reloc,/* special_function */ | |
152 | "R_FR30_8_IN_8", /* name */ | |
153 | true, /* partial_inplace */ | |
154 | 0x0000, /* src_mask */ | |
155 | 0x0ff0, /* dst_mask */ | |
156 | false), /* pcrel_offset */ | |
6609fa74 | 157 | |
252b5132 RH |
158 | /* A 9 bit absolute relocation. */ |
159 | HOWTO (R_FR30_9_IN_8, /* type */ | |
160 | 1, /* rightshift */ | |
161 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
162 | 9, /* bitsize */ | |
163 | false, /* pc_relative */ | |
164 | 4, /* bitpos */ | |
165 | complain_overflow_signed, /* complain_on_overflow */ | |
166 | bfd_elf_generic_reloc,/* special_function */ | |
167 | "R_FR30_9_IN_8", /* name */ | |
168 | true, /* partial_inplace */ | |
169 | 0x0000, /* src_mask */ | |
170 | 0x0ff0, /* dst_mask */ | |
171 | false), /* pcrel_offset */ | |
6609fa74 | 172 | |
252b5132 RH |
173 | /* A 10 bit absolute relocation. */ |
174 | HOWTO (R_FR30_10_IN_8, /* type */ | |
175 | 2, /* rightshift */ | |
176 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
177 | 10, /* bitsize */ | |
178 | false, /* pc_relative */ | |
179 | 4, /* bitpos */ | |
180 | complain_overflow_signed, /* complain_on_overflow */ | |
181 | bfd_elf_generic_reloc,/* special_function */ | |
182 | "R_FR30_10_IN_8", /* name */ | |
183 | true, /* partial_inplace */ | |
184 | 0x0000, /* src_mask */ | |
185 | 0x0ff0, /* dst_mask */ | |
186 | false), /* pcrel_offset */ | |
187 | ||
188 | /* A PC relative 9 bit relocation, right shifted by 1. */ | |
189 | HOWTO (R_FR30_9_PCREL, /* type */ | |
190 | 1, /* rightshift */ | |
191 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
192 | 9, /* bitsize */ | |
193 | true, /* pc_relative */ | |
194 | 0, /* bitpos */ | |
195 | complain_overflow_signed, /* complain_on_overflow */ | |
196 | bfd_elf_generic_reloc, /* special_function */ | |
197 | "R_FR30_9_PCREL", /* name */ | |
198 | false, /* partial_inplace */ | |
199 | 0x0000, /* src_mask */ | |
200 | 0x00ff, /* dst_mask */ | |
201 | false), /* pcrel_offset */ | |
202 | ||
203 | /* A PC relative 12 bit relocation, right shifted by 1. */ | |
204 | HOWTO (R_FR30_12_PCREL, /* type */ | |
205 | 1, /* rightshift */ | |
206 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
207 | 12, /* bitsize */ | |
208 | true, /* pc_relative */ | |
209 | 0, /* bitpos */ | |
210 | complain_overflow_signed, /* complain_on_overflow */ | |
211 | bfd_elf_generic_reloc, /* special_function */ | |
212 | "R_FR30_12_PCREL", /* name */ | |
213 | false, /* partial_inplace */ | |
214 | 0x0000, /* src_mask */ | |
215 | 0x07ff, /* dst_mask */ | |
216 | false), /* pcrel_offset */ | |
217 | /* GNU extension to record C++ vtable hierarchy */ | |
218 | HOWTO (R_FR30_GNU_VTINHERIT, /* type */ | |
219 | 0, /* rightshift */ | |
220 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
221 | 0, /* bitsize */ | |
222 | false, /* pc_relative */ | |
223 | 0, /* bitpos */ | |
224 | complain_overflow_dont, /* complain_on_overflow */ | |
225 | NULL, /* special_function */ | |
226 | "R_FR30_GNU_VTINHERIT", /* name */ | |
227 | false, /* partial_inplace */ | |
228 | 0, /* src_mask */ | |
229 | 0, /* dst_mask */ | |
230 | false), /* pcrel_offset */ | |
231 | ||
232 | /* GNU extension to record C++ vtable member usage */ | |
233 | HOWTO (R_FR30_GNU_VTENTRY, /* type */ | |
234 | 0, /* rightshift */ | |
235 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
236 | 0, /* bitsize */ | |
237 | false, /* pc_relative */ | |
238 | 0, /* bitpos */ | |
239 | complain_overflow_dont, /* complain_on_overflow */ | |
240 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
241 | "R_FR30_GNU_VTENTRY", /* name */ | |
242 | false, /* partial_inplace */ | |
243 | 0, /* src_mask */ | |
244 | 0, /* dst_mask */ | |
245 | false), /* pcrel_offset */ | |
252b5132 RH |
246 | }; |
247 | \f | |
248 | /* Utility to actually perform an R_FR30_20 reloc. */ | |
249 | ||
250 | static bfd_reloc_status_type | |
251 | fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data, | |
252 | input_section, output_bfd, error_message) | |
253 | bfd * abfd; | |
254 | arelent * reloc_entry; | |
255 | asymbol * symbol; | |
256 | PTR data; | |
257 | asection * input_section; | |
258 | bfd * output_bfd; | |
5f771d47 | 259 | char ** error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
260 | { |
261 | bfd_vma relocation; | |
262 | unsigned long x; | |
6609fa74 | 263 | |
252b5132 RH |
264 | /* This part is from bfd_elf_generic_reloc. */ |
265 | if (output_bfd != (bfd *) NULL | |
266 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
267 | && (! reloc_entry->howto->partial_inplace | |
268 | || reloc_entry->addend == 0)) | |
269 | { | |
270 | reloc_entry->address += input_section->output_offset; | |
271 | return bfd_reloc_ok; | |
272 | } | |
273 | ||
274 | if (output_bfd != NULL) | |
275 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
276 | return bfd_reloc_ok; | |
277 | ||
278 | relocation = | |
279 | symbol->value | |
280 | + symbol->section->output_section->vma | |
281 | + symbol->section->output_offset | |
282 | + reloc_entry->addend; | |
283 | ||
fc633e5b | 284 | if (relocation > (((bfd_vma) 1 << 20) - 1)) |
252b5132 RH |
285 | return bfd_reloc_overflow; |
286 | ||
23ccc829 | 287 | x = bfd_get_32 (abfd, (char *) data + reloc_entry->address); |
252b5132 | 288 | x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); |
dc810e39 | 289 | bfd_put_32 (abfd, (bfd_vma) x, (char *) data + reloc_entry->address); |
252b5132 RH |
290 | |
291 | return bfd_reloc_ok; | |
292 | } | |
252b5132 RH |
293 | \f |
294 | /* Utility to actually perform a R_FR30_48 reloc. */ | |
295 | ||
296 | static bfd_reloc_status_type | |
297 | fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data, | |
298 | input_section, output_bfd, error_message) | |
299 | bfd * abfd; | |
300 | arelent * reloc_entry; | |
301 | asymbol * symbol; | |
302 | PTR data; | |
303 | asection * input_section; | |
304 | bfd * output_bfd; | |
5f771d47 | 305 | char ** error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
306 | { |
307 | bfd_vma relocation; | |
308 | ||
309 | /* This part is from bfd_elf_generic_reloc. */ | |
310 | if (output_bfd != (bfd *) NULL | |
311 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
312 | && (! reloc_entry->howto->partial_inplace | |
313 | || reloc_entry->addend == 0)) | |
314 | { | |
315 | reloc_entry->address += input_section->output_offset; | |
316 | return bfd_reloc_ok; | |
317 | } | |
318 | ||
319 | if (output_bfd != NULL) | |
320 | /* FIXME: See bfd_perform_relocation. Is this right? */ | |
321 | return bfd_reloc_ok; | |
322 | ||
323 | relocation = | |
324 | symbol->value | |
325 | + symbol->section->output_section->vma | |
326 | + symbol->section->output_offset | |
327 | + reloc_entry->addend; | |
328 | ||
23ccc829 | 329 | bfd_put_32 (abfd, relocation, (char *) data + reloc_entry->address + 2); |
252b5132 RH |
330 | |
331 | return bfd_reloc_ok; | |
332 | } | |
333 | \f | |
334 | /* Map BFD reloc types to FR30 ELF reloc types. */ | |
335 | ||
336 | struct fr30_reloc_map | |
337 | { | |
338 | bfd_reloc_code_real_type bfd_reloc_val; | |
339 | unsigned int fr30_reloc_val; | |
340 | }; | |
341 | ||
342 | static const struct fr30_reloc_map fr30_reloc_map [] = | |
343 | { | |
344 | { BFD_RELOC_NONE, R_FR30_NONE }, | |
345 | { BFD_RELOC_8, R_FR30_8 }, | |
346 | { BFD_RELOC_FR30_20, R_FR30_20 }, | |
347 | { BFD_RELOC_32, R_FR30_32 }, | |
348 | { BFD_RELOC_FR30_48, R_FR30_48 }, | |
349 | { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 }, | |
350 | { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 }, | |
351 | { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 }, | |
352 | { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 }, | |
353 | { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL }, | |
354 | { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL }, | |
355 | { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT }, | |
356 | { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY }, | |
357 | }; | |
358 | ||
359 | static reloc_howto_type * | |
360 | fr30_reloc_type_lookup (abfd, code) | |
5f771d47 | 361 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
362 | bfd_reloc_code_real_type code; |
363 | { | |
364 | unsigned int i; | |
365 | ||
366 | for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]); | |
367 | --i;) | |
368 | if (fr30_reloc_map [i].bfd_reloc_val == code) | |
369 | return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val]; | |
6609fa74 | 370 | |
252b5132 RH |
371 | return NULL; |
372 | } | |
373 | ||
374 | /* Set the howto pointer for an FR30 ELF reloc. */ | |
375 | ||
376 | static void | |
377 | fr30_info_to_howto_rela (abfd, cache_ptr, dst) | |
5f771d47 | 378 | bfd * abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
379 | arelent * cache_ptr; |
380 | Elf32_Internal_Rela * dst; | |
381 | { | |
382 | unsigned int r_type; | |
383 | ||
384 | r_type = ELF32_R_TYPE (dst->r_info); | |
385 | BFD_ASSERT (r_type < (unsigned int) R_FR30_max); | |
386 | cache_ptr->howto = & fr30_elf_howto_table [r_type]; | |
387 | } | |
388 | \f | |
389 | /* Perform a single relocation. By default we use the standard BFD | |
390 | routines, but a few relocs, we have to do them ourselves. */ | |
391 | ||
392 | static bfd_reloc_status_type | |
393 | fr30_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation) | |
394 | reloc_howto_type * howto; | |
395 | bfd * input_bfd; | |
396 | asection * input_section; | |
397 | bfd_byte * contents; | |
398 | Elf_Internal_Rela * rel; | |
399 | bfd_vma relocation; | |
400 | { | |
401 | bfd_reloc_status_type r = bfd_reloc_ok; | |
402 | bfd_vma x; | |
403 | bfd_signed_vma srel; | |
6609fa74 | 404 | |
252b5132 RH |
405 | switch (howto->type) |
406 | { | |
407 | case R_FR30_20: | |
408 | contents += rel->r_offset; | |
409 | relocation += rel->r_addend; | |
410 | ||
411 | if (relocation > ((1 << 20) - 1)) | |
412 | return bfd_reloc_overflow; | |
6609fa74 | 413 | |
252b5132 RH |
414 | x = bfd_get_32 (input_bfd, contents); |
415 | x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); | |
416 | bfd_put_32 (input_bfd, x, contents); | |
417 | break; | |
6609fa74 | 418 | |
252b5132 RH |
419 | case R_FR30_48: |
420 | contents += rel->r_offset + 2; | |
421 | relocation += rel->r_addend; | |
422 | bfd_put_32 (input_bfd, relocation, contents); | |
423 | break; | |
424 | ||
425 | case R_FR30_9_PCREL: | |
426 | contents += rel->r_offset + 1; | |
427 | srel = (bfd_signed_vma) relocation; | |
428 | srel += rel->r_addend; | |
429 | srel -= rel->r_offset; | |
6609fa74 | 430 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
252b5132 RH |
431 | srel -= (input_section->output_section->vma + |
432 | input_section->output_offset); | |
6609fa74 | 433 | |
252b5132 RH |
434 | if (srel & 1) |
435 | return bfd_reloc_outofrange; | |
436 | if (srel > ((1 << 8) - 1) || (srel < - (1 << 8))) | |
437 | return bfd_reloc_overflow; | |
438 | ||
439 | bfd_put_8 (input_bfd, srel >> 1, contents); | |
440 | break; | |
441 | ||
442 | case R_FR30_12_PCREL: | |
443 | contents += rel->r_offset; | |
444 | srel = (bfd_signed_vma) relocation; | |
445 | srel += rel->r_addend; | |
446 | srel -= rel->r_offset; | |
6609fa74 | 447 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
252b5132 RH |
448 | srel -= (input_section->output_section->vma + |
449 | input_section->output_offset); | |
6609fa74 | 450 | |
252b5132 RH |
451 | if (srel & 1) |
452 | return bfd_reloc_outofrange; | |
453 | if (srel > ((1 << 11) - 1) || (srel < - (1 << 11))) | |
454 | return bfd_reloc_overflow; | |
6609fa74 | 455 | |
252b5132 RH |
456 | x = bfd_get_16 (input_bfd, contents); |
457 | x = (x & 0xf800) | ((srel >> 1) & 0x7ff); | |
458 | bfd_put_16 (input_bfd, x, contents); | |
459 | break; | |
460 | ||
461 | default: | |
462 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
463 | contents, rel->r_offset, | |
464 | relocation, rel->r_addend); | |
465 | } | |
466 | ||
467 | return r; | |
468 | } | |
252b5132 RH |
469 | \f |
470 | /* Relocate an FR30 ELF section. | |
471 | There is some attempt to make this function usable for many architectures, | |
472 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], | |
473 | if only to serve as a learning tool. | |
474 | ||
475 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
476 | to handle the relocations for a section. | |
477 | ||
478 | The relocs are always passed as Rela structures; if the section | |
479 | actually uses Rel structures, the r_addend field will always be | |
480 | zero. | |
481 | ||
482 | This function is responsible for adjusting the section contents as | |
483 | necessary, and (if using Rela relocs and generating a relocateable | |
484 | output file) adjusting the reloc addend as necessary. | |
485 | ||
486 | This function does not have to worry about setting the reloc | |
487 | address or the reloc symbol index. | |
488 | ||
489 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
490 | ||
491 | LOCAL_SECTIONS is an array giving the section in the input file | |
492 | corresponding to the st_shndx field of each local symbol. | |
493 | ||
494 | The global hash table entry for the global symbols can be found | |
495 | via elf_sym_hashes (input_bfd). | |
496 | ||
497 | When generating relocateable output, this function must handle | |
498 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
499 | going to be the section symbol corresponding to the output | |
500 | section, which means that the addend must be adjusted | |
501 | accordingly. */ | |
502 | ||
503 | static boolean | |
504 | fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section, | |
505 | contents, relocs, local_syms, local_sections) | |
f8df10f4 | 506 | bfd * output_bfd; |
252b5132 RH |
507 | struct bfd_link_info * info; |
508 | bfd * input_bfd; | |
509 | asection * input_section; | |
510 | bfd_byte * contents; | |
511 | Elf_Internal_Rela * relocs; | |
512 | Elf_Internal_Sym * local_syms; | |
513 | asection ** local_sections; | |
514 | { | |
515 | Elf_Internal_Shdr * symtab_hdr; | |
516 | struct elf_link_hash_entry ** sym_hashes; | |
517 | Elf_Internal_Rela * rel; | |
518 | Elf_Internal_Rela * relend; | |
519 | ||
b491616a AM |
520 | if (info->relocateable) |
521 | return true; | |
522 | ||
252b5132 RH |
523 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
524 | sym_hashes = elf_sym_hashes (input_bfd); | |
525 | relend = relocs + input_section->reloc_count; | |
526 | ||
527 | for (rel = relocs; rel < relend; rel ++) | |
528 | { | |
529 | reloc_howto_type * howto; | |
530 | unsigned long r_symndx; | |
531 | Elf_Internal_Sym * sym; | |
532 | asection * sec; | |
533 | struct elf_link_hash_entry * h; | |
534 | bfd_vma relocation; | |
535 | bfd_reloc_status_type r; | |
536 | const char * name = NULL; | |
537 | int r_type; | |
6609fa74 | 538 | |
252b5132 | 539 | r_type = ELF32_R_TYPE (rel->r_info); |
6609fa74 | 540 | |
252b5132 RH |
541 | if ( r_type == R_FR30_GNU_VTINHERIT |
542 | || r_type == R_FR30_GNU_VTENTRY) | |
543 | continue; | |
6609fa74 | 544 | |
252b5132 RH |
545 | r_symndx = ELF32_R_SYM (rel->r_info); |
546 | ||
252b5132 RH |
547 | howto = fr30_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
548 | h = NULL; | |
549 | sym = NULL; | |
550 | sec = NULL; | |
6609fa74 | 551 | |
252b5132 RH |
552 | if (r_symndx < symtab_hdr->sh_info) |
553 | { | |
554 | sym = local_syms + r_symndx; | |
555 | sec = local_sections [r_symndx]; | |
f8df10f4 | 556 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
6609fa74 | 557 | |
252b5132 RH |
558 | name = bfd_elf_string_from_elf_section |
559 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
560 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
561 | #if 0 | |
562 | fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", | |
563 | sec->name, name, sym->st_name, | |
564 | sec->output_section->vma, sec->output_offset, | |
565 | sym->st_value, rel->r_addend); | |
566 | #endif | |
567 | } | |
568 | else | |
569 | { | |
570 | h = sym_hashes [r_symndx - symtab_hdr->sh_info]; | |
6609fa74 | 571 | |
252b5132 RH |
572 | while (h->root.type == bfd_link_hash_indirect |
573 | || h->root.type == bfd_link_hash_warning) | |
574 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
575 | ||
576 | name = h->root.root.string; | |
6609fa74 | 577 | |
252b5132 RH |
578 | if (h->root.type == bfd_link_hash_defined |
579 | || h->root.type == bfd_link_hash_defweak) | |
580 | { | |
581 | sec = h->root.u.def.section; | |
582 | relocation = (h->root.u.def.value | |
583 | + sec->output_section->vma | |
584 | + sec->output_offset); | |
585 | #if 0 | |
586 | fprintf (stderr, | |
587 | "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", | |
588 | sec->name, name, h->root.u.def.value, | |
589 | sec->output_section->vma, sec->output_offset, relocation); | |
590 | #endif | |
591 | } | |
592 | else if (h->root.type == bfd_link_hash_undefweak) | |
593 | { | |
594 | #if 0 | |
595 | fprintf (stderr, "undefined: sec: %s, name: %s\n", | |
596 | sec->name, name); | |
597 | #endif | |
598 | relocation = 0; | |
599 | } | |
600 | else | |
601 | { | |
602 | if (! ((*info->callbacks->undefined_symbol) | |
603 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 604 | input_section, rel->r_offset, true))) |
252b5132 RH |
605 | return false; |
606 | #if 0 | |
607 | fprintf (stderr, "unknown: name: %s\n", name); | |
608 | #endif | |
609 | relocation = 0; | |
610 | } | |
611 | } | |
6609fa74 | 612 | |
252b5132 RH |
613 | r = fr30_final_link_relocate (howto, input_bfd, input_section, |
614 | contents, rel, relocation); | |
615 | ||
616 | if (r != bfd_reloc_ok) | |
617 | { | |
618 | const char * msg = (const char *) NULL; | |
619 | ||
620 | switch (r) | |
621 | { | |
622 | case bfd_reloc_overflow: | |
623 | r = info->callbacks->reloc_overflow | |
624 | (info, name, howto->name, (bfd_vma) 0, | |
625 | input_bfd, input_section, rel->r_offset); | |
626 | break; | |
6609fa74 | 627 | |
252b5132 RH |
628 | case bfd_reloc_undefined: |
629 | r = info->callbacks->undefined_symbol | |
5cc7c785 L |
630 | (info, name, input_bfd, input_section, rel->r_offset, |
631 | true); | |
252b5132 | 632 | break; |
6609fa74 | 633 | |
252b5132 RH |
634 | case bfd_reloc_outofrange: |
635 | msg = _("internal error: out of range error"); | |
636 | break; | |
637 | ||
638 | case bfd_reloc_notsupported: | |
639 | msg = _("internal error: unsupported relocation error"); | |
640 | break; | |
641 | ||
642 | case bfd_reloc_dangerous: | |
643 | msg = _("internal error: dangerous relocation"); | |
644 | break; | |
645 | ||
646 | default: | |
647 | msg = _("internal error: unknown error"); | |
648 | break; | |
649 | } | |
650 | ||
651 | if (msg) | |
652 | r = info->callbacks->warning | |
653 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
654 | ||
655 | if (! r) | |
656 | return false; | |
657 | } | |
658 | } | |
659 | ||
660 | return true; | |
661 | } | |
662 | \f | |
663 | /* Return the section that should be marked against GC for a given | |
664 | relocation. */ | |
665 | ||
666 | static asection * | |
667 | fr30_elf_gc_mark_hook (abfd, info, rel, h, sym) | |
668 | bfd * abfd; | |
5f771d47 | 669 | struct bfd_link_info * info ATTRIBUTE_UNUSED; |
252b5132 RH |
670 | Elf_Internal_Rela * rel; |
671 | struct elf_link_hash_entry * h; | |
672 | Elf_Internal_Sym * sym; | |
673 | { | |
674 | if (h != NULL) | |
675 | { | |
676 | switch (ELF32_R_TYPE (rel->r_info)) | |
677 | { | |
678 | case R_FR30_GNU_VTINHERIT: | |
679 | case R_FR30_GNU_VTENTRY: | |
680 | break; | |
681 | ||
682 | default: | |
683 | switch (h->root.type) | |
684 | { | |
685 | case bfd_link_hash_defined: | |
686 | case bfd_link_hash_defweak: | |
687 | return h->root.u.def.section; | |
688 | ||
689 | case bfd_link_hash_common: | |
690 | return h->root.u.c.p->section; | |
e049a0de ILT |
691 | |
692 | default: | |
693 | break; | |
252b5132 RH |
694 | } |
695 | } | |
696 | } | |
697 | else | |
698 | { | |
9ad5cbcf | 699 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
252b5132 RH |
700 | } |
701 | ||
702 | return NULL; | |
703 | } | |
704 | ||
705 | /* Update the got entry reference counts for the section being removed. */ | |
706 | ||
707 | static boolean | |
708 | fr30_elf_gc_sweep_hook (abfd, info, sec, relocs) | |
5f771d47 ILT |
709 | bfd * abfd ATTRIBUTE_UNUSED; |
710 | struct bfd_link_info * info ATTRIBUTE_UNUSED; | |
711 | asection * sec ATTRIBUTE_UNUSED; | |
712 | const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED; | |
252b5132 RH |
713 | { |
714 | return true; | |
715 | } | |
716 | ||
717 | /* Look through the relocs for a section during the first phase. | |
718 | Since we don't do .gots or .plts, we just need to consider the | |
719 | virtual table relocs for gc. */ | |
6609fa74 | 720 | |
252b5132 RH |
721 | static boolean |
722 | fr30_elf_check_relocs (abfd, info, sec, relocs) | |
723 | bfd *abfd; | |
724 | struct bfd_link_info *info; | |
725 | asection *sec; | |
726 | const Elf_Internal_Rela *relocs; | |
727 | { | |
728 | Elf_Internal_Shdr *symtab_hdr; | |
729 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
730 | const Elf_Internal_Rela *rel; | |
731 | const Elf_Internal_Rela *rel_end; | |
6609fa74 | 732 | |
252b5132 RH |
733 | if (info->relocateable) |
734 | return true; | |
6609fa74 | 735 | |
252b5132 RH |
736 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
737 | sym_hashes = elf_sym_hashes (abfd); | |
6609fa74 | 738 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
252b5132 RH |
739 | if (!elf_bad_symtab (abfd)) |
740 | sym_hashes_end -= symtab_hdr->sh_info; | |
6609fa74 | 741 | |
252b5132 RH |
742 | rel_end = relocs + sec->reloc_count; |
743 | for (rel = relocs; rel < rel_end; rel++) | |
744 | { | |
745 | struct elf_link_hash_entry *h; | |
746 | unsigned long r_symndx; | |
6609fa74 | 747 | |
252b5132 RH |
748 | r_symndx = ELF32_R_SYM (rel->r_info); |
749 | if (r_symndx < symtab_hdr->sh_info) | |
750 | h = NULL; | |
751 | else | |
752 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
6609fa74 | 753 | |
252b5132 RH |
754 | switch (ELF32_R_TYPE (rel->r_info)) |
755 | { | |
756 | /* This relocation describes the C++ object vtable hierarchy. | |
757 | Reconstruct it for later use during GC. */ | |
758 | case R_FR30_GNU_VTINHERIT: | |
759 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
760 | return false; | |
761 | break; | |
6609fa74 | 762 | |
252b5132 RH |
763 | /* This relocation describes which C++ vtable entries are actually |
764 | used. Record for later use during GC. */ | |
765 | case R_FR30_GNU_VTENTRY: | |
766 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
767 | return false; | |
768 | break; | |
769 | } | |
770 | } | |
6609fa74 | 771 | |
252b5132 RH |
772 | return true; |
773 | } | |
774 | \f | |
775 | #define ELF_ARCH bfd_arch_fr30 | |
aa4f99bb AO |
776 | #define ELF_MACHINE_CODE EM_FR30 |
777 | #define ELF_MACHINE_ALT1 EM_CYGNUS_FR30 | |
252b5132 RH |
778 | #define ELF_MAXPAGESIZE 0x1000 |
779 | ||
780 | #define TARGET_BIG_SYM bfd_elf32_fr30_vec | |
781 | #define TARGET_BIG_NAME "elf32-fr30" | |
782 | ||
783 | #define elf_info_to_howto_rel NULL | |
784 | #define elf_info_to_howto fr30_info_to_howto_rela | |
785 | #define elf_backend_relocate_section fr30_elf_relocate_section | |
786 | #define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook | |
787 | #define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook | |
788 | #define elf_backend_check_relocs fr30_elf_check_relocs | |
789 | ||
790 | #define elf_backend_can_gc_sections 1 | |
b491616a | 791 | #define elf_backend_rela_normal 1 |
252b5132 RH |
792 | |
793 | #define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup | |
794 | ||
795 | #include "elf32-target.h" |