Commit | Line | Data |
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ae1b99e4 JL |
1 | /* Matsushita 10300 specific support for 32-bit ELF |
2 | Copyright (C) 1996 Free Software Foundation, Inc. | |
efc2b064 JL |
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 | ||
25 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
26 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
943686fa JL |
27 | static void mn10300_info_to_howto |
28 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
12fdaaf8 JL |
29 | static bfd_reloc_status_type bfd_elf32_mn10300_reloc |
30 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
31 | ||
efc2b064 | 32 | |
943686fa JL |
33 | /* We have to use RELA instructions since md_apply_fix3 in the assembler |
34 | does absolutely nothing. */ | |
35 | #define USE_RELA | |
efc2b064 JL |
36 | |
37 | enum reloc_type | |
38 | { | |
ae1b99e4 | 39 | R_MN10300_NONE = 0, |
c3239e66 JL |
40 | R_MN10300_32, |
41 | R_MN10300_16, | |
42 | R_MN10300_8, | |
12fdaaf8 JL |
43 | R_MN10300_32B, |
44 | R_MN10300_16B, | |
45 | R_MN10300_PCREL32_1BYTE, | |
46 | R_MN10300_PCREL16_1BYTE, | |
47 | R_MN10300_PCREL8_1BYTE, | |
48 | R_MN10300_PCREL32_2BYTE, | |
49 | R_MN10300_PCREL16_2BYTE, | |
ae1b99e4 | 50 | R_MN10300_MAX |
efc2b064 JL |
51 | }; |
52 | ||
ae1b99e4 | 53 | static reloc_howto_type elf_mn10300_howto_table[] = |
efc2b064 | 54 | { |
207e944c | 55 | /* Dummy relocation. Does nothing. */ |
ae1b99e4 | 56 | HOWTO (R_MN10300_NONE, |
efc2b064 JL |
57 | 0, |
58 | 2, | |
59 | 16, | |
60 | false, | |
61 | 0, | |
62 | complain_overflow_bitfield, | |
63 | bfd_elf_generic_reloc, | |
ae1b99e4 | 64 | "R_MN10300_NONE", |
efc2b064 JL |
65 | false, |
66 | 0, | |
67 | 0, | |
68 | false), | |
207e944c | 69 | /* Standard 32 bit reloc. */ |
c3239e66 JL |
70 | HOWTO (R_MN10300_32, |
71 | 0, | |
72 | 2, | |
73 | 32, | |
74 | false, | |
75 | 0, | |
76 | complain_overflow_bitfield, | |
77 | bfd_elf_generic_reloc, | |
78 | "R_MN10300_32", | |
d28f058e | 79 | false, |
c3239e66 JL |
80 | 0xffffffff, |
81 | 0xffffffff, | |
82 | false), | |
207e944c | 83 | /* Standard 16 bit reloc. */ |
c3239e66 JL |
84 | HOWTO (R_MN10300_16, |
85 | 0, | |
86 | 1, | |
87 | 16, | |
88 | false, | |
89 | 0, | |
90 | complain_overflow_bitfield, | |
91 | bfd_elf_generic_reloc, | |
92 | "R_MN10300_16", | |
d28f058e | 93 | false, |
c3239e66 JL |
94 | 0xffff, |
95 | 0xffff, | |
96 | false), | |
207e944c | 97 | /* Standard 8 bit reloc. */ |
c3239e66 JL |
98 | HOWTO (R_MN10300_8, |
99 | 0, | |
100 | 0, | |
101 | 8, | |
102 | false, | |
103 | 0, | |
104 | complain_overflow_bitfield, | |
105 | bfd_elf_generic_reloc, | |
106 | "R_MN10300_8", | |
d28f058e | 107 | false, |
c3239e66 JL |
108 | 0xff, |
109 | 0xff, | |
110 | false), | |
207e944c | 111 | /* Standard 32 bit reloc, except it explicitly writes big-endian format. */ |
12fdaaf8 | 112 | HOWTO (R_MN10300_32B, |
c3239e66 JL |
113 | 0, |
114 | 2, | |
115 | 32, | |
12fdaaf8 JL |
116 | false, |
117 | 0, | |
118 | complain_overflow_bitfield, | |
119 | bfd_elf32_mn10300_reloc, | |
120 | "R_MN10300_32B", | |
d28f058e | 121 | false, |
12fdaaf8 JL |
122 | 0xffffffff, |
123 | 0xffffffff, | |
124 | false), | |
207e944c | 125 | /* Standard 16 bit reloc, except it explicitly writes big-endian format. */ |
12fdaaf8 JL |
126 | HOWTO (R_MN10300_16B, |
127 | 0, | |
128 | 1, | |
129 | 16, | |
130 | false, | |
c3239e66 JL |
131 | 0, |
132 | complain_overflow_bitfield, | |
12fdaaf8 JL |
133 | bfd_elf32_mn10300_reloc, |
134 | "R_MN10300_16B", | |
d28f058e | 135 | false, |
12fdaaf8 JL |
136 | 0xffff, |
137 | 0xffff, | |
138 | false), | |
207e944c JL |
139 | /* Simple 32bit pc-relative reloc with a 1 byte adjustment |
140 | to get the pc-relative offset correct. */ | |
12fdaaf8 JL |
141 | HOWTO (R_MN10300_PCREL32_1BYTE, |
142 | 0, | |
143 | 2, | |
144 | 32, | |
145 | true, | |
146 | 0, | |
147 | complain_overflow_bitfield, | |
148 | bfd_elf32_mn10300_reloc, | |
149 | "R_MN10300_PCREL32_1BYTE", | |
c3239e66 JL |
150 | true, |
151 | 0xffffffff, | |
152 | 0xffffffff, | |
153 | false), | |
207e944c JL |
154 | /* Simple 16bit pc-relative reloc with a 1 byte adjustment |
155 | to get the pc-relative offset correct. */ | |
12fdaaf8 | 156 | HOWTO (R_MN10300_PCREL16_1BYTE, |
c3239e66 JL |
157 | 0, |
158 | 1, | |
159 | 16, | |
160 | true, | |
161 | 0, | |
162 | complain_overflow_bitfield, | |
12fdaaf8 JL |
163 | bfd_elf32_mn10300_reloc, |
164 | "R_MN10300_PCREL16_1BYTE", | |
c3239e66 JL |
165 | true, |
166 | 0xffff, | |
167 | 0xffff, | |
168 | false), | |
207e944c JL |
169 | /* Simple 8 pc-relative reloc with a 1 byte adjustment |
170 | to get the pc-relative offset correct. */ | |
12fdaaf8 | 171 | HOWTO (R_MN10300_PCREL8_1BYTE, |
c3239e66 JL |
172 | 0, |
173 | 0, | |
174 | 8, | |
175 | true, | |
176 | 0, | |
177 | complain_overflow_bitfield, | |
12fdaaf8 JL |
178 | bfd_elf32_mn10300_reloc, |
179 | "R_MN10300_PCREL8_1BYTE", | |
c3239e66 JL |
180 | true, |
181 | 0xff, | |
182 | 0xff, | |
12fdaaf8 | 183 | true), |
207e944c JL |
184 | /* Simple 32 pc-relative reloc with a 2 byte adjustment |
185 | to get the pc-relative offset correct. */ | |
12fdaaf8 JL |
186 | HOWTO (R_MN10300_PCREL32_2BYTE, |
187 | 0, | |
188 | 2, | |
189 | 32, | |
190 | true, | |
191 | 0, | |
192 | complain_overflow_bitfield, | |
193 | bfd_elf32_mn10300_reloc, | |
194 | "R_MN10300_PCREL32_2BYTE", | |
195 | true, | |
196 | 0xffffffff, | |
197 | 0xffffffff, | |
198 | true), | |
207e944c JL |
199 | /* Simple 16 pc-relative reloc with a 2 byte adjustment |
200 | to get the pc-relative offset correct. */ | |
12fdaaf8 JL |
201 | HOWTO (R_MN10300_PCREL16_2BYTE, |
202 | 0, | |
203 | 1, | |
204 | 16, | |
205 | true, | |
206 | 0, | |
207 | complain_overflow_bitfield, | |
208 | bfd_elf32_mn10300_reloc, | |
209 | "R_MN10300_PCREL16_2BYTE", | |
210 | true, | |
211 | 0xffff, | |
212 | 0xffff, | |
213 | true), | |
efc2b064 JL |
214 | }; |
215 | ||
ae1b99e4 | 216 | struct mn10300_reloc_map |
efc2b064 JL |
217 | { |
218 | unsigned char bfd_reloc_val; | |
219 | unsigned char elf_reloc_val; | |
220 | }; | |
221 | ||
ae1b99e4 | 222 | static const struct mn10300_reloc_map mn10300_reloc_map[] = |
efc2b064 | 223 | { |
ae1b99e4 | 224 | { BFD_RELOC_NONE, R_MN10300_NONE, }, |
c3239e66 JL |
225 | { BFD_RELOC_32, R_MN10300_32, }, |
226 | { BFD_RELOC_16, R_MN10300_16, }, | |
227 | { BFD_RELOC_8, R_MN10300_8, }, | |
12fdaaf8 JL |
228 | { BFD_RELOC_MN10300_32B, R_MN10300_32B, }, |
229 | { BFD_RELOC_MN10300_16B, R_MN10300_16B, }, | |
230 | { BFD_RELOC_32_PCREL, R_MN10300_PCREL32_1BYTE, }, | |
231 | { BFD_RELOC_16_PCREL, R_MN10300_PCREL16_1BYTE, }, | |
232 | { BFD_RELOC_8_PCREL, R_MN10300_PCREL8_1BYTE, }, | |
233 | { BFD_RELOC_MN10300_32_PCREL, R_MN10300_PCREL32_2BYTE, }, | |
234 | { BFD_RELOC_MN10300_16_PCREL, R_MN10300_PCREL16_2BYTE, }, | |
efc2b064 JL |
235 | }; |
236 | ||
237 | static reloc_howto_type * | |
238 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
239 | bfd *abfd; | |
240 | bfd_reloc_code_real_type code; | |
241 | { | |
242 | unsigned int i; | |
243 | ||
244 | for (i = 0; | |
ae1b99e4 | 245 | i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map); |
efc2b064 JL |
246 | i++) |
247 | { | |
ae1b99e4 JL |
248 | if (mn10300_reloc_map[i].bfd_reloc_val == code) |
249 | return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val]; | |
efc2b064 JL |
250 | } |
251 | ||
252 | return NULL; | |
253 | } | |
254 | ||
12fdaaf8 | 255 | /* Set the howto pointer for an MN10300 ELF reloc. */ |
efc2b064 JL |
256 | |
257 | static void | |
943686fa | 258 | mn10300_info_to_howto (abfd, cache_ptr, dst) |
efc2b064 JL |
259 | bfd *abfd; |
260 | arelent *cache_ptr; | |
943686fa | 261 | Elf32_Internal_Rela *dst; |
efc2b064 JL |
262 | { |
263 | unsigned int r_type; | |
264 | ||
265 | r_type = ELF32_R_TYPE (dst->r_info); | |
ae1b99e4 JL |
266 | BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX); |
267 | cache_ptr->howto = &elf_mn10300_howto_table[r_type]; | |
efc2b064 JL |
268 | } |
269 | ||
12fdaaf8 JL |
270 | static bfd_reloc_status_type |
271 | bfd_elf32_mn10300_reloc (abfd, reloc, symbol, data, isection, obfd, err) | |
272 | bfd *abfd; | |
273 | arelent *reloc; | |
274 | asymbol *symbol; | |
275 | PTR data; | |
276 | asection *isection; | |
277 | bfd *obfd; | |
278 | char **err; | |
279 | { | |
280 | if (obfd != (bfd *) NULL | |
281 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
282 | && (! reloc->howto->partial_inplace | |
283 | || reloc->addend == 0)) | |
284 | { | |
285 | reloc->address += isection->output_offset; | |
286 | return bfd_reloc_ok; | |
287 | } | |
288 | else if (obfd != NULL) | |
289 | { | |
290 | return bfd_reloc_continue; | |
291 | } | |
292 | ||
293 | /* Catch relocs involving undefined symbols. */ | |
294 | if (bfd_is_und_section (symbol->section) | |
295 | && (symbol->flags & BSF_WEAK) == 0 | |
296 | && obfd == NULL) | |
297 | return bfd_reloc_undefined; | |
298 | ||
299 | /* We handle final linking of some relocs ourselves. */ | |
300 | { | |
207e944c | 301 | long relocation; |
12fdaaf8 JL |
302 | |
303 | /* Is the address of the relocation really within the section? */ | |
304 | if (reloc->address > isection->_cooked_size) | |
305 | return bfd_reloc_outofrange; | |
306 | ||
307 | /* Work out which section the relocation is targetted at and the | |
308 | initial relocation command value. */ | |
309 | ||
310 | /* Get symbol value. (Common symbols are special.) */ | |
311 | if (bfd_is_com_section (symbol->section)) | |
312 | relocation = 0; | |
313 | else | |
314 | relocation = symbol->value; | |
315 | ||
316 | /* Convert input-section-relative symbol value to absolute + addend. */ | |
317 | relocation += symbol->section->output_section->vma; | |
318 | relocation += symbol->section->output_offset; | |
319 | relocation += reloc->addend; | |
320 | ||
321 | if (reloc->howto->pc_relative == true) | |
322 | { | |
323 | /* Here the variable relocation holds the final address of the | |
324 | symbol we are relocating against, plus any addend. */ | |
325 | relocation -= isection->output_section->vma + isection->output_offset; | |
326 | ||
327 | /* Deal with pcrel_offset */ | |
328 | relocation -= reloc->address; | |
329 | ||
330 | if (reloc->howto->type == R_MN10300_PCREL32_1BYTE | |
331 | || reloc->howto->type == R_MN10300_PCREL16_1BYTE | |
332 | || reloc->howto->type == R_MN10300_PCREL8_1BYTE) | |
333 | relocation += 1; | |
334 | else if (reloc->howto->type == R_MN10300_PCREL32_2BYTE | |
335 | || reloc->howto->type == R_MN10300_PCREL16_2BYTE) | |
336 | relocation += 2; | |
337 | } | |
338 | ||
339 | /* I've got no clue... */ | |
340 | reloc->addend = 0; | |
341 | ||
342 | if (reloc->howto->size == 0) | |
343 | { | |
344 | if (relocation > 0x7f || relocation < -0x80) | |
345 | return bfd_reloc_overflow; | |
346 | ||
347 | bfd_put_8 (abfd, relocation & 0xff, | |
348 | (bfd_byte *)data + reloc->address); | |
349 | } | |
350 | else if (reloc->howto->size == 1) | |
351 | { | |
352 | if (relocation > 0x7fff || relocation < -0x8000) | |
353 | return bfd_reloc_overflow; | |
354 | ||
355 | bfd_putb16 (relocation & 0xffff, (bfd_byte *)data + reloc->address); | |
356 | } | |
357 | else if (reloc->howto->size == 2) | |
358 | bfd_putb32 (relocation, (bfd_byte *)data + reloc->address); | |
359 | return bfd_reloc_ok; | |
360 | } | |
361 | ||
362 | return bfd_reloc_continue; | |
363 | } | |
364 | ||
ae1b99e4 JL |
365 | #define TARGET_LITTLE_SYM bfd_elf32_mn10300_vec |
366 | #define TARGET_LITTLE_NAME "elf32-mn10300" | |
367 | #define ELF_ARCH bfd_arch_mn10300 | |
368 | #define ELF_MACHINE_CODE EM_CYGNUS_MN10300 | |
efc2b064 JL |
369 | #define ELF_MAXPAGESIZE 0x1000 |
370 | ||
943686fa JL |
371 | #define elf_info_to_howto mn10300_info_to_howto |
372 | #define elf_info_to_howto_rel 0 | |
efc2b064 | 373 | |
31cffd2e JL |
374 | #define elf_symbol_leading_char '_' |
375 | ||
efc2b064 | 376 | #include "elf32-target.h" |