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d9352518 | 1 | /* MeP-specific support for 32-bit ELF. |
b90efa5b | 2 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
d9352518 DB |
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 | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
d9352518 DB |
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 | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
d9352518 | 20 | |
d9352518 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
d9352518 DB |
23 | #include "libbfd.h" |
24 | #include "elf-bfd.h" | |
25 | #include "elf/mep.h" | |
26 | #include "libiberty.h" | |
27 | ||
28 | /* Forward declarations. */ | |
29 | ||
30 | /* Private relocation functions. */ | |
31 | \f | |
32 | #define MEPREL(type, size, bits, right, left, pcrel, overflow, mask) \ | |
33 | {(unsigned)type, right, size, bits, pcrel, left, overflow, mep_reloc, #type, FALSE, 0, mask, 0 } | |
34 | ||
35 | #define N complain_overflow_dont | |
36 | #define S complain_overflow_signed | |
37 | #define U complain_overflow_unsigned | |
38 | ||
39 | static bfd_reloc_status_type mep_reloc (bfd *, arelent *, struct bfd_symbol *, | |
40 | void *, asection *, bfd *, char **); | |
41 | ||
42 | static reloc_howto_type mep_elf_howto_table [] = | |
43 | { | |
44 | /* type, size, bits, leftshift, rightshift, pcrel, OD/OS/OU, mask. */ | |
6346d5ca | 45 | MEPREL (R_MEP_NONE, 3, 0, 0, 0, 0, N, 0), |
d9352518 DB |
46 | MEPREL (R_RELC, 0, 0, 0, 0, 0, N, 0), |
47 | /* MEPRELOC:HOWTO */ | |
48 | /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */ | |
49 | MEPREL (R_MEP_8, 0, 8, 0, 0, 0, U, 0xff), | |
50 | MEPREL (R_MEP_16, 1, 16, 0, 0, 0, U, 0xffff), | |
51 | MEPREL (R_MEP_32, 2, 32, 0, 0, 0, U, 0xffffffff), | |
52 | MEPREL (R_MEP_PCREL8A2, 1, 8, 1, 1, 1, S, 0x00fe), | |
53 | MEPREL (R_MEP_PCREL12A2,1, 12, 1, 1, 1, S, 0x0ffe), | |
54 | MEPREL (R_MEP_PCREL17A2,2, 17, 0, 1, 1, S, 0x0000ffff), | |
55 | MEPREL (R_MEP_PCREL24A2,2, 24, 0, 1, 1, S, 0x07f0ffff), | |
56 | MEPREL (R_MEP_PCABS24A2,2, 24, 0, 1, 0, U, 0x07f0ffff), | |
57 | MEPREL (R_MEP_LOW16, 2, 16, 0, 0, 0, N, 0x0000ffff), | |
58 | MEPREL (R_MEP_HI16U, 2, 32, 0,16, 0, N, 0x0000ffff), | |
59 | MEPREL (R_MEP_HI16S, 2, 32, 0,16, 0, N, 0x0000ffff), | |
60 | MEPREL (R_MEP_GPREL, 2, 16, 0, 0, 0, S, 0x0000ffff), | |
61 | MEPREL (R_MEP_TPREL, 2, 16, 0, 0, 0, S, 0x0000ffff), | |
62 | MEPREL (R_MEP_TPREL7, 1, 7, 0, 0, 0, U, 0x007f), | |
63 | MEPREL (R_MEP_TPREL7A2, 1, 7, 1, 1, 0, U, 0x007e), | |
64 | MEPREL (R_MEP_TPREL7A4, 1, 7, 2, 2, 0, U, 0x007c), | |
65 | MEPREL (R_MEP_UIMM24, 2, 24, 0, 0, 0, U, 0x00ffffff), | |
66 | MEPREL (R_MEP_ADDR24A4, 2, 24, 0, 2, 0, U, 0x00fcffff), | |
67 | MEPREL (R_MEP_GNU_VTINHERIT,1, 0,16,32, 0, N, 0x0000), | |
68 | MEPREL (R_MEP_GNU_VTENTRY,1, 0,16,32, 0, N, 0x0000), | |
69 | /* MEPRELOC:END */ | |
70 | }; | |
71 | ||
72 | #define VALID_MEP_RELOC(N) ((N) >= 0 \ | |
73 | && (N) < ARRAY_SIZE (mep_elf_howto_table) | |
74 | ||
75 | #undef N | |
76 | #undef S | |
77 | #undef U | |
78 | ||
79 | static bfd_reloc_status_type | |
80 | mep_reloc | |
81 | (bfd * abfd ATTRIBUTE_UNUSED, | |
82 | arelent * reloc_entry ATTRIBUTE_UNUSED, | |
83 | struct bfd_symbol * symbol ATTRIBUTE_UNUSED, | |
84 | void * data ATTRIBUTE_UNUSED, | |
85 | asection * input_section ATTRIBUTE_UNUSED, | |
86 | bfd * output_bfd ATTRIBUTE_UNUSED, | |
87 | char ** error_message ATTRIBUTE_UNUSED) | |
88 | { | |
89 | return bfd_reloc_ok; | |
90 | } | |
91 | ||
92 | \f | |
93 | ||
94 | #define BFD_RELOC_MEP_NONE BFD_RELOC_NONE | |
95 | #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE) | |
96 | #define MAP(n) case BFD_RELOC_MEP_##n: type = R_MEP_##n; break | |
97 | #else | |
98 | #define MAP(n) case BFD_RELOC_MEP_/**/n: type = R_MEP_/**/n; break | |
99 | #endif | |
100 | ||
101 | static reloc_howto_type * | |
102 | mep_reloc_type_lookup | |
103 | (bfd * abfd ATTRIBUTE_UNUSED, | |
104 | bfd_reloc_code_real_type code) | |
105 | { | |
106 | unsigned int type = 0; | |
107 | ||
108 | switch (code) | |
109 | { | |
110 | MAP(NONE); | |
111 | case BFD_RELOC_8: | |
112 | type = R_MEP_8; | |
113 | break; | |
114 | case BFD_RELOC_16: | |
115 | type = R_MEP_16; | |
116 | break; | |
117 | case BFD_RELOC_32: | |
118 | type = R_MEP_32; | |
119 | break; | |
120 | case BFD_RELOC_VTABLE_ENTRY: | |
121 | type = R_MEP_GNU_VTENTRY; | |
122 | break; | |
123 | case BFD_RELOC_VTABLE_INHERIT: | |
124 | type = R_MEP_GNU_VTINHERIT; | |
125 | break; | |
126 | case BFD_RELOC_RELC: | |
127 | type = R_RELC; | |
128 | break; | |
129 | ||
130 | /* MEPRELOC:MAP */ | |
131 | /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */ | |
132 | MAP(8); | |
133 | MAP(16); | |
134 | MAP(32); | |
135 | MAP(PCREL8A2); | |
136 | MAP(PCREL12A2); | |
137 | MAP(PCREL17A2); | |
138 | MAP(PCREL24A2); | |
139 | MAP(PCABS24A2); | |
140 | MAP(LOW16); | |
141 | MAP(HI16U); | |
142 | MAP(HI16S); | |
143 | MAP(GPREL); | |
144 | MAP(TPREL); | |
145 | MAP(TPREL7); | |
146 | MAP(TPREL7A2); | |
147 | MAP(TPREL7A4); | |
148 | MAP(UIMM24); | |
149 | MAP(ADDR24A4); | |
150 | MAP(GNU_VTINHERIT); | |
151 | MAP(GNU_VTENTRY); | |
152 | /* MEPRELOC:END */ | |
153 | ||
154 | default: | |
155 | /* Pacify gcc -Wall. */ | |
4a97a0e5 | 156 | (*_bfd_error_handler) (_("mep: no reloc for code %d"), code); |
d9352518 DB |
157 | return NULL; |
158 | } | |
159 | ||
160 | if (mep_elf_howto_table[type].type != type) | |
161 | { | |
4a97a0e5 AM |
162 | (*_bfd_error_handler) (_("MeP: howto %d has type %d"), |
163 | type, mep_elf_howto_table[type].type); | |
d9352518 DB |
164 | abort (); |
165 | } | |
166 | ||
167 | return mep_elf_howto_table + type; | |
168 | } | |
169 | ||
170 | #undef MAP | |
171 | ||
157090f7 AM |
172 | static reloc_howto_type * |
173 | mep_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) | |
174 | { | |
175 | unsigned int i; | |
176 | ||
177 | for (i = 0; | |
178 | i < sizeof (mep_elf_howto_table) / sizeof (mep_elf_howto_table[0]); | |
179 | i++) | |
180 | if (mep_elf_howto_table[i].name != NULL | |
181 | && strcasecmp (mep_elf_howto_table[i].name, r_name) == 0) | |
182 | return &mep_elf_howto_table[i]; | |
183 | ||
184 | return NULL; | |
185 | } | |
d9352518 DB |
186 | \f |
187 | /* Perform a single relocation. */ | |
188 | ||
189 | static struct bfd_link_info *mep_info; | |
190 | static int warn_tp = 0, warn_sda = 0; | |
191 | ||
192 | static bfd_vma | |
193 | mep_lookup_global | |
194 | (char * name, | |
195 | bfd_vma ofs, | |
196 | bfd_vma * cache, | |
197 | int * warn) | |
198 | { | |
199 | struct bfd_link_hash_entry *h; | |
200 | ||
201 | if (*cache || *warn) | |
202 | return *cache; | |
203 | ||
204 | h = bfd_link_hash_lookup (mep_info->hash, name, FALSE, FALSE, TRUE); | |
205 | if (h == 0 || h->type != bfd_link_hash_defined) | |
206 | { | |
207 | *warn = ofs + 1; | |
208 | return 0; | |
209 | } | |
210 | *cache = (h->u.def.value | |
211 | + h->u.def.section->output_section->vma | |
212 | + h->u.def.section->output_offset); | |
213 | return *cache; | |
214 | } | |
215 | ||
216 | static bfd_vma | |
217 | mep_tpoff_base (bfd_vma ofs) | |
218 | { | |
219 | static bfd_vma cache = 0; | |
220 | return mep_lookup_global ("__tpbase", ofs, &cache, &warn_tp); | |
221 | } | |
222 | ||
223 | static bfd_vma | |
224 | mep_sdaoff_base (bfd_vma ofs) | |
225 | { | |
226 | static bfd_vma cache = 0; | |
227 | return mep_lookup_global ("__sdabase", ofs, &cache, &warn_sda); | |
228 | } | |
229 | ||
230 | static bfd_reloc_status_type | |
231 | mep_final_link_relocate | |
232 | (reloc_howto_type * howto, | |
233 | bfd * input_bfd, | |
234 | asection * input_section, | |
235 | bfd_byte * contents, | |
236 | Elf_Internal_Rela * rel, | |
237 | bfd_vma relocation) | |
238 | { | |
239 | unsigned long u; | |
240 | long s; | |
241 | unsigned char *byte; | |
242 | bfd_vma pc; | |
243 | bfd_reloc_status_type r = bfd_reloc_ok; | |
244 | int e2, e4; | |
245 | ||
246 | if (bfd_big_endian (input_bfd)) | |
247 | { | |
248 | e2 = 0; | |
249 | e4 = 0; | |
250 | } | |
251 | else | |
252 | { | |
253 | e2 = 1; | |
254 | e4 = 3; | |
255 | } | |
256 | ||
257 | pc = (input_section->output_section->vma | |
258 | + input_section->output_offset | |
259 | + rel->r_offset); | |
260 | ||
261 | s = relocation + rel->r_addend; | |
262 | ||
263 | byte = (unsigned char *)contents + rel->r_offset; | |
264 | ||
265 | if (howto->type == R_MEP_PCREL24A2 | |
266 | && s == 0 | |
267 | && pc >= 0x800000) | |
268 | { | |
269 | /* This is an unreachable branch to an undefined weak function. | |
270 | Silently ignore it, since the opcode can't do that but should | |
271 | never be executed anyway. */ | |
272 | return bfd_reloc_ok; | |
273 | } | |
274 | ||
275 | if (howto->pc_relative) | |
276 | s -= pc; | |
277 | ||
278 | u = (unsigned long) s; | |
279 | ||
280 | switch (howto->type) | |
281 | { | |
282 | /* MEPRELOC:APPLY */ | |
283 | /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */ | |
284 | case R_MEP_8: /* 76543210 */ | |
285 | if (u > 255) r = bfd_reloc_overflow; | |
286 | byte[0] = (u & 0xff); | |
287 | break; | |
288 | case R_MEP_16: /* fedcba9876543210 */ | |
289 | if (u > 65535) r = bfd_reloc_overflow; | |
290 | byte[0^e2] = ((u >> 8) & 0xff); | |
291 | byte[1^e2] = (u & 0xff); | |
292 | break; | |
293 | case R_MEP_32: /* vutsrqponmlkjihgfedcba9876543210 */ | |
294 | byte[0^e4] = ((u >> 24) & 0xff); | |
295 | byte[1^e4] = ((u >> 16) & 0xff); | |
296 | byte[2^e4] = ((u >> 8) & 0xff); | |
297 | byte[3^e4] = (u & 0xff); | |
298 | break; | |
299 | case R_MEP_PCREL8A2: /* --------7654321- */ | |
300 | if (-128 > s || s > 127) r = bfd_reloc_overflow; | |
301 | byte[1^e2] = (byte[1^e2] & 0x01) | (s & 0xfe); | |
302 | break; | |
303 | case R_MEP_PCREL12A2: /* ----ba987654321- */ | |
304 | if (-2048 > s || s > 2047) r = bfd_reloc_overflow; | |
305 | byte[0^e2] = (byte[0^e2] & 0xf0) | ((s >> 8) & 0x0f); | |
306 | byte[1^e2] = (byte[1^e2] & 0x01) | (s & 0xfe); | |
307 | break; | |
308 | case R_MEP_PCREL17A2: /* ----------------gfedcba987654321 */ | |
309 | if (-65536 > s || s > 65535) r = bfd_reloc_overflow; | |
310 | byte[2^e2] = ((s >> 9) & 0xff); | |
311 | byte[3^e2] = ((s >> 1) & 0xff); | |
312 | break; | |
313 | case R_MEP_PCREL24A2: /* -----7654321----nmlkjihgfedcba98 */ | |
314 | if (-8388608 > s || s > 8388607) r = bfd_reloc_overflow; | |
315 | byte[0^e2] = (byte[0^e2] & 0xf8) | ((s >> 5) & 0x07); | |
316 | byte[1^e2] = (byte[1^e2] & 0x0f) | ((s << 3) & 0xf0); | |
317 | byte[2^e2] = ((s >> 16) & 0xff); | |
318 | byte[3^e2] = ((s >> 8) & 0xff); | |
319 | break; | |
320 | case R_MEP_PCABS24A2: /* -----7654321----nmlkjihgfedcba98 */ | |
321 | if (u > 16777215) r = bfd_reloc_overflow; | |
322 | byte[0^e2] = (byte[0^e2] & 0xf8) | ((u >> 5) & 0x07); | |
323 | byte[1^e2] = (byte[1^e2] & 0x0f) | ((u << 3) & 0xf0); | |
324 | byte[2^e2] = ((u >> 16) & 0xff); | |
325 | byte[3^e2] = ((u >> 8) & 0xff); | |
326 | break; | |
327 | case R_MEP_LOW16: /* ----------------fedcba9876543210 */ | |
328 | byte[2^e2] = ((u >> 8) & 0xff); | |
329 | byte[3^e2] = (u & 0xff); | |
330 | break; | |
331 | case R_MEP_HI16U: /* ----------------vutsrqponmlkjihg */ | |
332 | byte[2^e2] = ((u >> 24) & 0xff); | |
333 | byte[3^e2] = ((u >> 16) & 0xff); | |
334 | break; | |
335 | case R_MEP_HI16S: /* ----------------vutsrqponmlkjihg */ | |
b4928193 NC |
336 | if (s & 0x8000) |
337 | s += 0x10000; | |
d9352518 DB |
338 | byte[2^e2] = ((s >> 24) & 0xff); |
339 | byte[3^e2] = ((s >> 16) & 0xff); | |
340 | break; | |
341 | case R_MEP_GPREL: /* ----------------fedcba9876543210 */ | |
342 | s -= mep_sdaoff_base(rel->r_offset); | |
343 | if (-32768 > s || s > 32767) r = bfd_reloc_overflow; | |
344 | byte[2^e2] = ((s >> 8) & 0xff); | |
345 | byte[3^e2] = (s & 0xff); | |
346 | break; | |
347 | case R_MEP_TPREL: /* ----------------fedcba9876543210 */ | |
348 | s -= mep_tpoff_base(rel->r_offset); | |
349 | if (-32768 > s || s > 32767) r = bfd_reloc_overflow; | |
350 | byte[2^e2] = ((s >> 8) & 0xff); | |
351 | byte[3^e2] = (s & 0xff); | |
352 | break; | |
353 | case R_MEP_TPREL7: /* ---------6543210 */ | |
354 | u -= mep_tpoff_base(rel->r_offset); | |
355 | if (u > 127) r = bfd_reloc_overflow; | |
356 | byte[1^e2] = (byte[1^e2] & 0x80) | (u & 0x7f); | |
357 | break; | |
358 | case R_MEP_TPREL7A2: /* ---------654321- */ | |
359 | u -= mep_tpoff_base(rel->r_offset); | |
360 | if (u > 127) r = bfd_reloc_overflow; | |
361 | byte[1^e2] = (byte[1^e2] & 0x81) | (u & 0x7e); | |
362 | break; | |
363 | case R_MEP_TPREL7A4: /* ---------65432-- */ | |
364 | u -= mep_tpoff_base(rel->r_offset); | |
365 | if (u > 127) r = bfd_reloc_overflow; | |
366 | byte[1^e2] = (byte[1^e2] & 0x83) | (u & 0x7c); | |
367 | break; | |
368 | case R_MEP_UIMM24: /* --------76543210nmlkjihgfedcba98 */ | |
369 | if (u > 16777215) r = bfd_reloc_overflow; | |
370 | byte[1^e2] = (u & 0xff); | |
371 | byte[2^e2] = ((u >> 16) & 0xff); | |
372 | byte[3^e2] = ((u >> 8) & 0xff); | |
373 | break; | |
374 | case R_MEP_ADDR24A4: /* --------765432--nmlkjihgfedcba98 */ | |
375 | if (u > 16777215) r = bfd_reloc_overflow; | |
376 | byte[1^e2] = (byte[1^e2] & 0x03) | (u & 0xfc); | |
377 | byte[2^e2] = ((u >> 16) & 0xff); | |
378 | byte[3^e2] = ((u >> 8) & 0xff); | |
379 | break; | |
380 | case R_MEP_GNU_VTINHERIT: /* ---------------- */ | |
381 | break; | |
382 | case R_MEP_GNU_VTENTRY: /* ---------------- */ | |
383 | break; | |
384 | /* MEPRELOC:END */ | |
385 | default: | |
386 | abort (); | |
387 | } | |
388 | ||
389 | return r; | |
390 | } | |
391 | \f | |
392 | /* Set the howto pointer for a MEP ELF reloc. */ | |
393 | ||
394 | static void | |
395 | mep_info_to_howto_rela | |
396 | (bfd * abfd ATTRIBUTE_UNUSED, | |
397 | arelent * cache_ptr, | |
398 | Elf_Internal_Rela * dst) | |
399 | { | |
400 | unsigned int r_type; | |
401 | ||
402 | r_type = ELF32_R_TYPE (dst->r_info); | |
5860e3f8 NC |
403 | if (r_type >= R_MEP_max) |
404 | { | |
64d29018 | 405 | _bfd_error_handler (_("%B: invalid MEP reloc number: %d"), abfd, r_type); |
5860e3f8 NC |
406 | r_type = 0; |
407 | } | |
d9352518 DB |
408 | cache_ptr->howto = & mep_elf_howto_table [r_type]; |
409 | } | |
d9352518 DB |
410 | \f |
411 | /* Relocate a MEP ELF section. | |
412 | There is some attempt to make this function usable for many architectures, | |
413 | both USE_REL and USE_RELA ['twould be nice if such a critter existed], | |
414 | if only to serve as a learning tool. | |
415 | ||
416 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
417 | to handle the relocations for a section. | |
418 | ||
419 | The relocs are always passed as Rela structures; if the section | |
420 | actually uses Rel structures, the r_addend field will always be | |
421 | zero. | |
422 | ||
423 | This function is responsible for adjusting the section contents as | |
424 | necessary, and (if using Rela relocs and generating a relocatable | |
425 | output file) adjusting the reloc addend as necessary. | |
426 | ||
427 | This function does not have to worry about setting the reloc | |
428 | address or the reloc symbol index. | |
429 | ||
430 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
431 | ||
432 | LOCAL_SECTIONS is an array giving the section in the input file | |
433 | corresponding to the st_shndx field of each local symbol. | |
434 | ||
435 | The global hash table entry for the global symbols can be found | |
436 | via elf_sym_hashes (input_bfd). | |
437 | ||
438 | When generating relocatable output, this function must handle | |
439 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
440 | going to be the section symbol corresponding to the output | |
441 | section, which means that the addend must be adjusted | |
442 | accordingly. */ | |
443 | ||
444 | static bfd_boolean | |
445 | mep_elf_relocate_section | |
446 | (bfd * output_bfd ATTRIBUTE_UNUSED, | |
447 | struct bfd_link_info * info, | |
448 | bfd * input_bfd, | |
449 | asection * input_section, | |
450 | bfd_byte * contents, | |
451 | Elf_Internal_Rela * relocs, | |
452 | Elf_Internal_Sym * local_syms, | |
453 | asection ** local_sections) | |
454 | { | |
455 | Elf_Internal_Shdr * symtab_hdr; | |
456 | struct elf_link_hash_entry ** sym_hashes; | |
457 | Elf_Internal_Rela * rel; | |
458 | Elf_Internal_Rela * relend; | |
459 | ||
460 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
461 | sym_hashes = elf_sym_hashes (input_bfd); | |
462 | relend = relocs + input_section->reloc_count; | |
463 | ||
464 | mep_info = info; | |
465 | ||
466 | for (rel = relocs; rel < relend; rel ++) | |
467 | { | |
468 | reloc_howto_type * howto; | |
469 | unsigned long r_symndx; | |
470 | Elf_Internal_Sym * sym; | |
471 | asection * sec; | |
472 | struct elf_link_hash_entry * h; | |
473 | bfd_vma relocation; | |
474 | bfd_reloc_status_type r; | |
475 | const char * name = NULL; | |
476 | int r_type; | |
477 | ||
478 | r_type = ELF32_R_TYPE (rel->r_info); | |
d9352518 | 479 | r_symndx = ELF32_R_SYM (rel->r_info); |
d9352518 DB |
480 | howto = mep_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
481 | h = NULL; | |
482 | sym = NULL; | |
483 | sec = NULL; | |
484 | ||
485 | if (r_symndx < symtab_hdr->sh_info) | |
486 | { | |
487 | sym = local_syms + r_symndx; | |
488 | sec = local_sections [r_symndx]; | |
489 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
490 | ||
491 | name = bfd_elf_string_from_elf_section | |
492 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
493 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
d9352518 DB |
494 | } |
495 | else | |
496 | { | |
62d887d4 | 497 | bfd_boolean warned, unresolved_reloc, ignored; |
d9352518 | 498 | |
0f02bbd9 AM |
499 | RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, |
500 | r_symndx, symtab_hdr, sym_hashes, | |
501 | h, sec, relocation, | |
62d887d4 | 502 | unresolved_reloc, warned, ignored); |
d9352518 DB |
503 | |
504 | name = h->root.root.string; | |
d9352518 DB |
505 | } |
506 | ||
dbaa2011 | 507 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 508 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 509 | rel, 1, relend, howto, 0, contents); |
ab96bf03 AM |
510 | |
511 | if (info->relocatable) | |
0f02bbd9 | 512 | continue; |
ab96bf03 | 513 | |
cdfeee4f AM |
514 | if (r_type == R_RELC) |
515 | r = bfd_elf_perform_complex_relocation (input_bfd, input_section, | |
516 | contents, rel, relocation); | |
517 | else | |
518 | r = mep_final_link_relocate (howto, input_bfd, input_section, | |
519 | contents, rel, relocation); | |
d9352518 DB |
520 | |
521 | if (r != bfd_reloc_ok) | |
522 | { | |
523 | const char * msg = (const char *) NULL; | |
524 | ||
525 | switch (r) | |
526 | { | |
527 | case bfd_reloc_overflow: | |
528 | r = info->callbacks->reloc_overflow | |
529 | (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, | |
530 | input_bfd, input_section, rel->r_offset); | |
531 | break; | |
532 | ||
533 | case bfd_reloc_undefined: | |
534 | r = info->callbacks->undefined_symbol | |
535 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
536 | break; | |
537 | ||
538 | case bfd_reloc_outofrange: | |
539 | msg = _("internal error: out of range error"); | |
540 | break; | |
541 | ||
542 | case bfd_reloc_notsupported: | |
543 | msg = _("internal error: unsupported relocation error"); | |
544 | break; | |
545 | ||
546 | case bfd_reloc_dangerous: | |
547 | msg = _("internal error: dangerous relocation"); | |
548 | break; | |
549 | ||
550 | default: | |
551 | msg = _("internal error: unknown error"); | |
552 | break; | |
553 | } | |
554 | ||
555 | if (msg) | |
556 | r = info->callbacks->warning | |
557 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
558 | ||
559 | if (! r) | |
560 | return FALSE; | |
561 | } | |
562 | } | |
563 | ||
564 | if (warn_tp) | |
565 | info->callbacks->undefined_symbol | |
566 | (info, "__tpbase", input_bfd, input_section, warn_tp-1, TRUE); | |
567 | if (warn_sda) | |
568 | info->callbacks->undefined_symbol | |
569 | (info, "__sdabase", input_bfd, input_section, warn_sda-1, TRUE); | |
570 | if (warn_sda || warn_tp) | |
571 | return FALSE; | |
572 | ||
573 | return TRUE; | |
574 | } | |
d9352518 DB |
575 | \f |
576 | /* Function to set the ELF flag bits. */ | |
577 | ||
578 | static bfd_boolean | |
579 | mep_elf_set_private_flags (bfd * abfd, | |
580 | flagword flags) | |
581 | { | |
582 | elf_elfheader (abfd)->e_flags = flags; | |
583 | elf_flags_init (abfd) = TRUE; | |
584 | return TRUE; | |
585 | } | |
586 | ||
d9352518 DB |
587 | /* Merge backend specific data from an object file to the output |
588 | object file when linking. */ | |
589 | ||
590 | static bfd_boolean | |
591 | mep_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd) | |
592 | { | |
593 | static bfd *last_ibfd = 0; | |
594 | flagword old_flags, new_flags; | |
595 | flagword old_partial, new_partial; | |
596 | ||
cc643b88 | 597 | /* Check if we have the same endianness. */ |
d9352518 DB |
598 | if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE) |
599 | return FALSE; | |
600 | ||
601 | new_flags = elf_elfheader (ibfd)->e_flags; | |
602 | old_flags = elf_elfheader (obfd)->e_flags; | |
603 | ||
604 | #ifdef DEBUG | |
605 | _bfd_error_handler ("%B: old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s", | |
606 | ibfd, old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no"); | |
607 | #endif | |
608 | ||
609 | /* First call, no flags set. */ | |
610 | if (!elf_flags_init (obfd)) | |
611 | { | |
612 | elf_flags_init (obfd) = TRUE; | |
613 | old_flags = new_flags; | |
614 | } | |
615 | else if ((new_flags | old_flags) & EF_MEP_LIBRARY) | |
616 | { | |
617 | /* Non-library flags trump library flags. The choice doesn't really | |
618 | matter if both OLD_FLAGS and NEW_FLAGS have EF_MEP_LIBRARY set. */ | |
619 | if (old_flags & EF_MEP_LIBRARY) | |
620 | old_flags = new_flags; | |
621 | } | |
622 | else | |
623 | { | |
624 | /* Make sure they're for the same mach. Allow upgrade from the "mep" | |
625 | mach. */ | |
626 | new_partial = (new_flags & EF_MEP_CPU_MASK); | |
627 | old_partial = (old_flags & EF_MEP_CPU_MASK); | |
628 | if (new_partial == old_partial) | |
629 | ; | |
630 | else if (new_partial == EF_MEP_CPU_MEP) | |
631 | ; | |
632 | else if (old_partial == EF_MEP_CPU_MEP) | |
633 | old_flags = (old_flags & ~EF_MEP_CPU_MASK) | new_partial; | |
634 | else | |
635 | { | |
636 | _bfd_error_handler (_("%B and %B are for different cores"), last_ibfd, ibfd); | |
637 | bfd_set_error (bfd_error_invalid_target); | |
638 | return FALSE; | |
639 | } | |
640 | ||
641 | /* Make sure they're for the same me_module. Allow basic config to | |
642 | mix with any other. */ | |
643 | new_partial = (new_flags & EF_MEP_INDEX_MASK); | |
644 | old_partial = (old_flags & EF_MEP_INDEX_MASK); | |
645 | if (new_partial == old_partial) | |
646 | ; | |
647 | else if (new_partial == 0) | |
648 | ; | |
649 | else if (old_partial == 0) | |
650 | old_flags = (old_flags & ~EF_MEP_INDEX_MASK) | new_partial; | |
651 | else | |
652 | { | |
653 | _bfd_error_handler (_("%B and %B are for different configurations"), last_ibfd, ibfd); | |
654 | bfd_set_error (bfd_error_invalid_target); | |
655 | return FALSE; | |
656 | } | |
657 | } | |
658 | ||
659 | elf_elfheader (obfd)->e_flags = old_flags; | |
660 | last_ibfd = ibfd; | |
661 | return TRUE; | |
662 | } | |
663 | ||
664 | /* This will be edited by the MeP configration tool. */ | |
665 | static const char * config_names[] = | |
666 | { | |
667 | "basic" | |
668 | /* start-mepcfgtool */ | |
c1a0a41f | 669 | ,"default" |
d9352518 DB |
670 | /* end-mepcfgtool */ |
671 | }; | |
672 | ||
673 | static const char * core_names[] = | |
674 | { | |
675 | "MeP", "MeP-c2", "MeP-c3", "MeP-h1" | |
676 | }; | |
677 | ||
678 | static bfd_boolean | |
679 | mep_elf_print_private_bfd_data (bfd * abfd, void * ptr) | |
680 | { | |
681 | FILE * file = (FILE *) ptr; | |
682 | flagword flags, partial_flags; | |
683 | ||
684 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
685 | ||
686 | /* Print normal ELF private data. */ | |
687 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
688 | ||
689 | flags = elf_elfheader (abfd)->e_flags; | |
0af1713e | 690 | fprintf (file, _("private flags = 0x%lx"), (unsigned long) flags); |
d9352518 DB |
691 | |
692 | partial_flags = (flags & EF_MEP_CPU_MASK) >> 24; | |
693 | if (partial_flags < ARRAY_SIZE (core_names)) | |
694 | fprintf (file, " core: %s", core_names[(long)partial_flags]); | |
695 | ||
696 | partial_flags = flags & EF_MEP_INDEX_MASK; | |
697 | if (partial_flags < ARRAY_SIZE (config_names)) | |
698 | fprintf (file, " me_module: %s", config_names[(long)partial_flags]); | |
699 | ||
700 | fputc ('\n', file); | |
701 | ||
702 | return TRUE; | |
703 | } | |
704 | ||
705 | /* Return the machine subcode from the ELF e_flags header. */ | |
706 | ||
707 | static int | |
708 | elf32_mep_machine (bfd * abfd) | |
709 | { | |
710 | switch (elf_elfheader (abfd)->e_flags & EF_MEP_CPU_MASK) | |
711 | { | |
712 | default: break; | |
713 | case EF_MEP_CPU_C2: return bfd_mach_mep; | |
714 | case EF_MEP_CPU_C3: return bfd_mach_mep; | |
715 | case EF_MEP_CPU_C4: return bfd_mach_mep; | |
4d28413b | 716 | case EF_MEP_CPU_C5: return bfd_mach_mep_c5; |
d9352518 DB |
717 | case EF_MEP_CPU_H1: return bfd_mach_mep_h1; |
718 | } | |
719 | ||
720 | return bfd_mach_mep; | |
721 | } | |
722 | ||
723 | static bfd_boolean | |
724 | mep_elf_object_p (bfd * abfd) | |
725 | { | |
d9352518 DB |
726 | bfd_default_set_arch_mach (abfd, bfd_arch_mep, elf32_mep_machine (abfd)); |
727 | return TRUE; | |
728 | } | |
729 | ||
730 | static bfd_boolean | |
731 | mep_elf_section_flags (flagword * flags, const Elf_Internal_Shdr * hdr) | |
732 | { | |
733 | if (hdr->sh_flags & SHF_MEP_VLIW) | |
734 | * flags |= SEC_MEP_VLIW; | |
735 | return TRUE; | |
736 | } | |
737 | ||
738 | static bfd_boolean | |
739 | mep_elf_fake_sections (bfd * abfd ATTRIBUTE_UNUSED, | |
740 | Elf_Internal_Shdr * hdr, | |
741 | asection * sec) | |
742 | { | |
743 | if (sec->flags & SEC_MEP_VLIW) | |
744 | hdr->sh_flags |= SHF_MEP_VLIW; | |
745 | return TRUE; | |
746 | } | |
747 | ||
748 | \f | |
749 | #define ELF_ARCH bfd_arch_mep | |
750 | #define ELF_MACHINE_CODE EM_CYGNUS_MEP | |
751 | #define ELF_MAXPAGESIZE 0x1000 | |
752 | ||
6d00b590 | 753 | #define TARGET_BIG_SYM mep_elf32_vec |
d9352518 DB |
754 | #define TARGET_BIG_NAME "elf32-mep" |
755 | ||
6d00b590 | 756 | #define TARGET_LITTLE_SYM mep_elf32_le_vec |
d9352518 DB |
757 | #define TARGET_LITTLE_NAME "elf32-mep-little" |
758 | ||
759 | #define elf_info_to_howto_rel NULL | |
760 | #define elf_info_to_howto mep_info_to_howto_rela | |
761 | #define elf_backend_relocate_section mep_elf_relocate_section | |
d9352518 DB |
762 | #define elf_backend_object_p mep_elf_object_p |
763 | #define elf_backend_section_flags mep_elf_section_flags | |
764 | #define elf_backend_fake_sections mep_elf_fake_sections | |
765 | ||
d9352518 | 766 | #define bfd_elf32_bfd_reloc_type_lookup mep_reloc_type_lookup |
0f02bbd9 | 767 | #define bfd_elf32_bfd_reloc_name_lookup mep_reloc_name_lookup |
d9352518 | 768 | #define bfd_elf32_bfd_set_private_flags mep_elf_set_private_flags |
d9352518 DB |
769 | #define bfd_elf32_bfd_merge_private_bfd_data mep_elf_merge_private_bfd_data |
770 | #define bfd_elf32_bfd_print_private_bfd_data mep_elf_print_private_bfd_data | |
771 | ||
0f02bbd9 | 772 | #define elf_backend_rela_normal 1 |
d9352518 DB |
773 | |
774 | #include "elf32-target.h" |