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ae1b99e4 JL |
1 | /* Matsushita 10200 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)); | |
e14af8fc JL |
27 | static void mn10200_info_to_howto |
28 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); | |
29 | static bfd_reloc_status_type bfd_elf32_mn10200_reloc | |
30 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
efc2b064 | 31 | |
e14af8fc JL |
32 | |
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_MN10200_NONE = 0, |
e14af8fc JL |
40 | R_MN10200_32, |
41 | R_MN10200_16, | |
42 | R_MN10200_8, | |
8d16fe5c | 43 | #if 0 |
e14af8fc JL |
44 | R_MN10200_PCREL32_1BYTE, |
45 | R_MN10200_PCREL16_1BYTE, | |
46 | R_MN10200_PCREL8_1BYTE, | |
47 | R_MN10200_PCREL32_2BYTE, | |
48 | R_MN10200_PCREL16_2BYTE, | |
49 | #endif | |
ae1b99e4 | 50 | R_MN10200_MAX |
efc2b064 JL |
51 | }; |
52 | ||
ae1b99e4 | 53 | static reloc_howto_type elf_mn10200_howto_table[] = |
efc2b064 | 54 | { |
e14af8fc | 55 | /* Dummy relocation. Does nothing. */ |
ae1b99e4 | 56 | HOWTO (R_MN10200_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_MN10200_NONE", |
efc2b064 JL |
65 | false, |
66 | 0, | |
67 | 0, | |
68 | false), | |
e14af8fc JL |
69 | /* Standard 32 bit reloc. */ |
70 | HOWTO (R_MN10200_32, | |
71 | 0, | |
72 | 2, | |
73 | 32, | |
74 | false, | |
75 | 0, | |
76 | complain_overflow_bitfield, | |
77 | bfd_elf_generic_reloc, | |
78 | "R_MN10200_32", | |
79 | false, | |
80 | 0xffffffff, | |
81 | 0xffffffff, | |
82 | false), | |
83 | /* Standard 16 bit reloc. */ | |
84 | HOWTO (R_MN10200_16, | |
85 | 0, | |
86 | 1, | |
87 | 16, | |
88 | false, | |
89 | 0, | |
90 | complain_overflow_bitfield, | |
91 | bfd_elf_generic_reloc, | |
92 | "R_MN10200_16", | |
93 | false, | |
94 | 0xffff, | |
95 | 0xffff, | |
96 | false), | |
97 | /* Standard 8 bit reloc. */ | |
98 | HOWTO (R_MN10200_8, | |
99 | 0, | |
100 | 0, | |
101 | 8, | |
102 | false, | |
103 | 0, | |
104 | complain_overflow_bitfield, | |
105 | bfd_elf_generic_reloc, | |
106 | "R_MN10200_8", | |
107 | false, | |
108 | 0xff, | |
109 | 0xff, | |
110 | false), | |
8d16fe5c | 111 | #if 0 |
e14af8fc JL |
112 | /* Simple 32bit pc-relative reloc with a 1 byte adjustment |
113 | to get the pc-relative offset correct. */ | |
114 | HOWTO (R_MN10200_PCREL32_1BYTE, | |
115 | 0, | |
116 | 2, | |
117 | 32, | |
118 | true, | |
119 | 0, | |
120 | complain_overflow_bitfield, | |
121 | bfd_elf32_mn10200_reloc, | |
122 | "R_MN10200_PCREL32_1BYTE", | |
123 | true, | |
124 | 0xffffffff, | |
125 | 0xffffffff, | |
126 | false), | |
127 | /* Simple 16bit pc-relative reloc with a 1 byte adjustment | |
128 | to get the pc-relative offset correct. */ | |
129 | HOWTO (R_MN10200_PCREL16_1BYTE, | |
130 | 0, | |
131 | 1, | |
132 | 16, | |
133 | true, | |
134 | 0, | |
135 | complain_overflow_bitfield, | |
136 | bfd_elf32_mn10200_reloc, | |
137 | "R_MN10200_PCREL16_1BYTE", | |
138 | true, | |
139 | 0xffff, | |
140 | 0xffff, | |
141 | false), | |
142 | /* Simple 8 pc-relative reloc with a 1 byte adjustment | |
143 | to get the pc-relative offset correct. */ | |
144 | HOWTO (R_MN10200_PCREL8_1BYTE, | |
145 | 0, | |
146 | 0, | |
147 | 8, | |
148 | true, | |
149 | 0, | |
150 | complain_overflow_bitfield, | |
151 | bfd_elf32_mn10200_reloc, | |
152 | "R_MN10200_PCREL8_1BYTE", | |
153 | true, | |
154 | 0xff, | |
155 | 0xff, | |
156 | true), | |
157 | /* Simple 32 pc-relative reloc with a 2 byte adjustment | |
158 | to get the pc-relative offset correct. */ | |
159 | HOWTO (R_MN10200_PCREL32_2BYTE, | |
160 | 0, | |
161 | 2, | |
162 | 32, | |
163 | true, | |
164 | 0, | |
165 | complain_overflow_bitfield, | |
166 | bfd_elf32_mn10200_reloc, | |
167 | "R_MN10200_PCREL32_2BYTE", | |
168 | true, | |
169 | 0xffffffff, | |
170 | 0xffffffff, | |
171 | true), | |
172 | /* Simple 16 pc-relative reloc with a 2 byte adjustment | |
173 | to get the pc-relative offset correct. */ | |
174 | HOWTO (R_MN10200_PCREL16_2BYTE, | |
175 | 0, | |
176 | 1, | |
177 | 16, | |
178 | true, | |
179 | 0, | |
180 | complain_overflow_bitfield, | |
181 | bfd_elf32_mn10200_reloc, | |
182 | "R_MN10200_PCREL16_2BYTE", | |
183 | true, | |
184 | 0xffff, | |
185 | 0xffff, | |
186 | true), | |
187 | #endif | |
efc2b064 JL |
188 | }; |
189 | ||
ae1b99e4 | 190 | struct mn10200_reloc_map |
efc2b064 JL |
191 | { |
192 | unsigned char bfd_reloc_val; | |
193 | unsigned char elf_reloc_val; | |
194 | }; | |
195 | ||
ae1b99e4 | 196 | static const struct mn10200_reloc_map mn10200_reloc_map[] = |
efc2b064 | 197 | { |
ae1b99e4 | 198 | { BFD_RELOC_NONE, R_MN10200_NONE, }, |
e14af8fc JL |
199 | { BFD_RELOC_32, R_MN10200_32, }, |
200 | { BFD_RELOC_16, R_MN10200_16, }, | |
201 | { BFD_RELOC_8, R_MN10200_8, }, | |
8d16fe5c | 202 | #if 0 |
e14af8fc JL |
203 | { BFD_RELOC_MN10200_32B, R_MN10200_32B, }, |
204 | { BFD_RELOC_MN10200_16B, R_MN10200_16B, }, | |
205 | { BFD_RELOC_32_PCREL, R_MN10200_PCREL32_1BYTE, }, | |
206 | { BFD_RELOC_16_PCREL, R_MN10200_PCREL16_1BYTE, }, | |
207 | { BFD_RELOC_8_PCREL, R_MN10200_PCREL8_1BYTE, }, | |
208 | { BFD_RELOC_MN10200_32_PCREL, R_MN10200_PCREL32_2BYTE, }, | |
209 | { BFD_RELOC_MN10200_16_PCREL, R_MN10200_PCREL16_2BYTE, }, | |
210 | #endif | |
efc2b064 JL |
211 | }; |
212 | ||
213 | static reloc_howto_type * | |
214 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
215 | bfd *abfd; | |
216 | bfd_reloc_code_real_type code; | |
217 | { | |
218 | unsigned int i; | |
219 | ||
220 | for (i = 0; | |
ae1b99e4 | 221 | i < sizeof (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map); |
efc2b064 JL |
222 | i++) |
223 | { | |
ae1b99e4 JL |
224 | if (mn10200_reloc_map[i].bfd_reloc_val == code) |
225 | return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val]; | |
efc2b064 JL |
226 | } |
227 | ||
228 | return NULL; | |
229 | } | |
230 | ||
e14af8fc | 231 | /* Set the howto pointer for an MN10200 ELF reloc. */ |
efc2b064 JL |
232 | |
233 | static void | |
e14af8fc | 234 | mn10200_info_to_howto (abfd, cache_ptr, dst) |
efc2b064 JL |
235 | bfd *abfd; |
236 | arelent *cache_ptr; | |
e14af8fc | 237 | Elf32_Internal_Rela *dst; |
efc2b064 JL |
238 | { |
239 | unsigned int r_type; | |
240 | ||
241 | r_type = ELF32_R_TYPE (dst->r_info); | |
ae1b99e4 JL |
242 | BFD_ASSERT (r_type < (unsigned int) R_MN10200_MAX); |
243 | cache_ptr->howto = &elf_mn10200_howto_table[r_type]; | |
efc2b064 JL |
244 | } |
245 | ||
e14af8fc JL |
246 | static bfd_reloc_status_type |
247 | bfd_elf32_mn10200_reloc (abfd, reloc, symbol, data, isection, obfd, err) | |
248 | bfd *abfd; | |
249 | arelent *reloc; | |
250 | asymbol *symbol; | |
251 | PTR data; | |
252 | asection *isection; | |
253 | bfd *obfd; | |
254 | char **err; | |
255 | { | |
256 | if (obfd != (bfd *) NULL | |
257 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
258 | && (! reloc->howto->partial_inplace | |
259 | || reloc->addend == 0)) | |
260 | { | |
261 | reloc->address += isection->output_offset; | |
262 | return bfd_reloc_ok; | |
263 | } | |
264 | else if (obfd != NULL) | |
265 | { | |
266 | return bfd_reloc_continue; | |
267 | } | |
268 | ||
269 | #if 0 | |
270 | /* Catch relocs involving undefined symbols. */ | |
271 | if (bfd_is_und_section (symbol->section) | |
272 | && (symbol->flags & BSF_WEAK) == 0 | |
273 | && obfd == NULL) | |
274 | return bfd_reloc_undefined; | |
275 | ||
276 | /* We handle final linking of some relocs ourselves. */ | |
277 | { | |
278 | long relocation; | |
279 | ||
280 | /* Is the address of the relocation really within the section? */ | |
281 | if (reloc->address > isection->_cooked_size) | |
282 | return bfd_reloc_outofrange; | |
283 | ||
284 | /* Work out which section the relocation is targetted at and the | |
285 | initial relocation command value. */ | |
286 | ||
287 | /* Get symbol value. (Common symbols are special.) */ | |
288 | if (bfd_is_com_section (symbol->section)) | |
289 | relocation = 0; | |
290 | else | |
291 | relocation = symbol->value; | |
292 | ||
293 | /* Convert input-section-relative symbol value to absolute + addend. */ | |
294 | relocation += symbol->section->output_section->vma; | |
295 | relocation += symbol->section->output_offset; | |
296 | relocation += reloc->addend; | |
297 | ||
298 | if (reloc->howto->pc_relative == true) | |
299 | { | |
300 | /* Here the variable relocation holds the final address of the | |
301 | symbol we are relocating against, plus any addend. */ | |
302 | relocation -= isection->output_section->vma + isection->output_offset; | |
303 | ||
304 | /* Deal with pcrel_offset */ | |
305 | relocation -= reloc->address; | |
306 | ||
307 | if (reloc->howto->type == R_MN10200_PCREL32_1BYTE | |
308 | || reloc->howto->type == R_MN10200_PCREL16_1BYTE | |
309 | || reloc->howto->type == R_MN10200_PCREL8_1BYTE) | |
310 | relocation += 1; | |
311 | else if (reloc->howto->type == R_MN10200_PCREL32_2BYTE | |
312 | || reloc->howto->type == R_MN10200_PCREL16_2BYTE) | |
313 | relocation += 2; | |
314 | } | |
315 | ||
316 | /* I've got no clue... */ | |
317 | reloc->addend = 0; | |
318 | ||
319 | if (reloc->howto->size == 0) | |
320 | { | |
321 | if (relocation > 0x7f || relocation < -0x80) | |
322 | return bfd_reloc_overflow; | |
323 | ||
324 | bfd_put_8 (abfd, relocation & 0xff, | |
325 | (bfd_byte *)data + reloc->address); | |
326 | } | |
327 | else if (reloc->howto->size == 1) | |
328 | { | |
329 | if (relocation > 0x7fff || relocation < -0x8000) | |
330 | return bfd_reloc_overflow; | |
331 | ||
332 | bfd_putb16 (relocation & 0xffff, (bfd_byte *)data + reloc->address); | |
333 | } | |
334 | else if (reloc->howto->size == 2) | |
335 | bfd_putb32 (relocation, (bfd_byte *)data + reloc->address); | |
336 | return bfd_reloc_ok; | |
337 | } | |
338 | #endif | |
339 | ||
340 | return bfd_reloc_continue; | |
341 | } | |
342 | ||
ae1b99e4 JL |
343 | #define TARGET_LITTLE_SYM bfd_elf32_mn10200_vec |
344 | #define TARGET_LITTLE_NAME "elf32-mn10200" | |
345 | #define ELF_ARCH bfd_arch_mn10200 | |
346 | #define ELF_MACHINE_CODE EM_CYGNUS_MN10200 | |
efc2b064 JL |
347 | #define ELF_MAXPAGESIZE 0x1000 |
348 | ||
e14af8fc JL |
349 | #define elf_info_to_howto mn10200_info_to_howto |
350 | #define elf_info_to_howto_rel 0 | |
351 | ||
352 | #define elf_symbol_leading_char '_' | |
efc2b064 JL |
353 | |
354 | #include "elf32-target.h" |