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bfd/
[binutils.git] / bfd / elf32-mep.c
blob1993b03398070442e063a51ba312161b4186786d
1 /* MeP-specific support for 32-bit ELF.
2 Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "elf/mep.h"
27 #include "libiberty.h"
28
29 /* Forward declarations. */
30
31 /* Private relocation functions. */
32 \f
33 #define MEPREL(type, size, bits, right, left, pcrel, overflow, mask) \
34 {(unsigned)type, right, size, bits, pcrel, left, overflow, mep_reloc, #type, FALSE, 0, mask, 0 }
35
36 #define N complain_overflow_dont
37 #define S complain_overflow_signed
38 #define U complain_overflow_unsigned
39
40 static bfd_reloc_status_type mep_reloc (bfd *, arelent *, struct bfd_symbol *,
41 void *, asection *, bfd *, char **);
42
43 static reloc_howto_type mep_elf_howto_table [] =
44 {
45 /* type, size, bits, leftshift, rightshift, pcrel, OD/OS/OU, mask. */
46 MEPREL (R_MEP_NONE, 0, 0, 0, 0, 0, N, 0),
47 MEPREL (R_RELC, 0, 0, 0, 0, 0, N, 0),
48 /* MEPRELOC:HOWTO */
49 /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
50 MEPREL (R_MEP_8, 0, 8, 0, 0, 0, U, 0xff),
51 MEPREL (R_MEP_16, 1, 16, 0, 0, 0, U, 0xffff),
52 MEPREL (R_MEP_32, 2, 32, 0, 0, 0, U, 0xffffffff),
53 MEPREL (R_MEP_PCREL8A2, 1, 8, 1, 1, 1, S, 0x00fe),
54 MEPREL (R_MEP_PCREL12A2,1, 12, 1, 1, 1, S, 0x0ffe),
55 MEPREL (R_MEP_PCREL17A2,2, 17, 0, 1, 1, S, 0x0000ffff),
56 MEPREL (R_MEP_PCREL24A2,2, 24, 0, 1, 1, S, 0x07f0ffff),
57 MEPREL (R_MEP_PCABS24A2,2, 24, 0, 1, 0, U, 0x07f0ffff),
58 MEPREL (R_MEP_LOW16, 2, 16, 0, 0, 0, N, 0x0000ffff),
59 MEPREL (R_MEP_HI16U, 2, 32, 0,16, 0, N, 0x0000ffff),
60 MEPREL (R_MEP_HI16S, 2, 32, 0,16, 0, N, 0x0000ffff),
61 MEPREL (R_MEP_GPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
62 MEPREL (R_MEP_TPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
63 MEPREL (R_MEP_TPREL7, 1, 7, 0, 0, 0, U, 0x007f),
64 MEPREL (R_MEP_TPREL7A2, 1, 7, 1, 1, 0, U, 0x007e),
65 MEPREL (R_MEP_TPREL7A4, 1, 7, 2, 2, 0, U, 0x007c),
66 MEPREL (R_MEP_UIMM24, 2, 24, 0, 0, 0, U, 0x00ffffff),
67 MEPREL (R_MEP_ADDR24A4, 2, 24, 0, 2, 0, U, 0x00fcffff),
68 MEPREL (R_MEP_GNU_VTINHERIT,1, 0,16,32, 0, N, 0x0000),
69 MEPREL (R_MEP_GNU_VTENTRY,1, 0,16,32, 0, N, 0x0000),
70 /* MEPRELOC:END */
71 };
72
73 #define VALID_MEP_RELOC(N) ((N) >= 0 \
74 && (N) < ARRAY_SIZE (mep_elf_howto_table)
75
76 #undef N
77 #undef S
78 #undef U
79
80 static bfd_reloc_status_type
81 mep_reloc
82 (bfd * abfd ATTRIBUTE_UNUSED,
83 arelent * reloc_entry ATTRIBUTE_UNUSED,
84 struct bfd_symbol * symbol ATTRIBUTE_UNUSED,
85 void * data ATTRIBUTE_UNUSED,
86 asection * input_section ATTRIBUTE_UNUSED,
87 bfd * output_bfd ATTRIBUTE_UNUSED,
88 char ** error_message ATTRIBUTE_UNUSED)
89 {
90 return bfd_reloc_ok;
91 }
92
93 \f
94
95 #define BFD_RELOC_MEP_NONE BFD_RELOC_NONE
96 #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
97 #define MAP(n) case BFD_RELOC_MEP_##n: type = R_MEP_##n; break
98 #else
99 #define MAP(n) case BFD_RELOC_MEP_/**/n: type = R_MEP_/**/n; break
100 #endif
101
102 static reloc_howto_type *
103 mep_reloc_type_lookup
104 (bfd * abfd ATTRIBUTE_UNUSED,
105 bfd_reloc_code_real_type code)
106 {
107 unsigned int type = 0;
108
109 switch (code)
110 {
111 MAP(NONE);
112 case BFD_RELOC_8:
113 type = R_MEP_8;
114 break;
115 case BFD_RELOC_16:
116 type = R_MEP_16;
117 break;
118 case BFD_RELOC_32:
119 type = R_MEP_32;
120 break;
121 case BFD_RELOC_VTABLE_ENTRY:
122 type = R_MEP_GNU_VTENTRY;
123 break;
124 case BFD_RELOC_VTABLE_INHERIT:
125 type = R_MEP_GNU_VTINHERIT;
126 break;
127 case BFD_RELOC_RELC:
128 type = R_RELC;
129 break;
130
131 /* MEPRELOC:MAP */
132 /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
133 MAP(8);
134 MAP(16);
135 MAP(32);
136 MAP(PCREL8A2);
137 MAP(PCREL12A2);
138 MAP(PCREL17A2);
139 MAP(PCREL24A2);
140 MAP(PCABS24A2);
141 MAP(LOW16);
142 MAP(HI16U);
143 MAP(HI16S);
144 MAP(GPREL);
145 MAP(TPREL);
146 MAP(TPREL7);
147 MAP(TPREL7A2);
148 MAP(TPREL7A4);
149 MAP(UIMM24);
150 MAP(ADDR24A4);
151 MAP(GNU_VTINHERIT);
152 MAP(GNU_VTENTRY);
153 /* MEPRELOC:END */
154
155 default:
156 /* Pacify gcc -Wall. */
157 fprintf (stderr, "mep: no reloc for code %d\n", code);
158 return NULL;
159 }
160
161 if (mep_elf_howto_table[type].type != type)
162 {
163 fprintf (stderr, "MeP: howto %d has type %d\n", type, mep_elf_howto_table[type].type);
164 abort ();
165 }
166
167 return mep_elf_howto_table + type;
168 }
169
170 #undef MAP
171
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 }
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 */
336 if (s & 0x8000)
337 s += 0x10000;
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);
403 cache_ptr->howto = & mep_elf_howto_table [r_type];
404 }
405 \f
406 /* Relocate a MEP ELF section.
407 There is some attempt to make this function usable for many architectures,
408 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
409 if only to serve as a learning tool.
410
411 The RELOCATE_SECTION function is called by the new ELF backend linker
412 to handle the relocations for a section.
413
414 The relocs are always passed as Rela structures; if the section
415 actually uses Rel structures, the r_addend field will always be
416 zero.
417
418 This function is responsible for adjusting the section contents as
419 necessary, and (if using Rela relocs and generating a relocatable
420 output file) adjusting the reloc addend as necessary.
421
422 This function does not have to worry about setting the reloc
423 address or the reloc symbol index.
424
425 LOCAL_SYMS is a pointer to the swapped in local symbols.
426
427 LOCAL_SECTIONS is an array giving the section in the input file
428 corresponding to the st_shndx field of each local symbol.
429
430 The global hash table entry for the global symbols can be found
431 via elf_sym_hashes (input_bfd).
432
433 When generating relocatable output, this function must handle
434 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
435 going to be the section symbol corresponding to the output
436 section, which means that the addend must be adjusted
437 accordingly. */
438
439 static bfd_boolean
440 mep_elf_relocate_section
441 (bfd * output_bfd ATTRIBUTE_UNUSED,
442 struct bfd_link_info * info,
443 bfd * input_bfd,
444 asection * input_section,
445 bfd_byte * contents,
446 Elf_Internal_Rela * relocs,
447 Elf_Internal_Sym * local_syms,
448 asection ** local_sections)
449 {
450 Elf_Internal_Shdr * symtab_hdr;
451 struct elf_link_hash_entry ** sym_hashes;
452 Elf_Internal_Rela * rel;
453 Elf_Internal_Rela * relend;
454
455 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
456 sym_hashes = elf_sym_hashes (input_bfd);
457 relend = relocs + input_section->reloc_count;
458
459 mep_info = info;
460
461 for (rel = relocs; rel < relend; rel ++)
462 {
463 reloc_howto_type * howto;
464 unsigned long r_symndx;
465 Elf_Internal_Sym * sym;
466 asection * sec;
467 struct elf_link_hash_entry * h;
468 bfd_vma relocation;
469 bfd_reloc_status_type r;
470 const char * name = NULL;
471 int r_type;
472
473 r_type = ELF32_R_TYPE (rel->r_info);
474 r_symndx = ELF32_R_SYM (rel->r_info);
475 howto = mep_elf_howto_table + ELF32_R_TYPE (rel->r_info);
476 h = NULL;
477 sym = NULL;
478 sec = NULL;
479
480 if (r_symndx < symtab_hdr->sh_info)
481 {
482 sym = local_syms + r_symndx;
483 sec = local_sections [r_symndx];
484 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
485
486 name = bfd_elf_string_from_elf_section
487 (input_bfd, symtab_hdr->sh_link, sym->st_name);
488 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
489 }
490 else
491 {
492 bfd_boolean warned, unresolved_reloc;
493
494 RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel,
495 r_symndx, symtab_hdr, sym_hashes,
496 h, sec, relocation,
497 unresolved_reloc, warned);
498
499 name = h->root.root.string;
500 }
501
502 if (sec != NULL && elf_discarded_section (sec))
503 {
504 /* For relocs against symbols from removed linkonce sections,
505 or sections discarded by a linker script, we just want the
506 section contents zeroed. Avoid any special processing. */
507 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
508 rel->r_info = 0;
509 rel->r_addend = 0;
510 continue;
511 }
512
513 if (info->relocatable)
514 continue;
515
516 if (r_type == R_RELC)
517 r = bfd_elf_perform_complex_relocation (input_bfd, input_section,
518 contents, rel, relocation);
519 else
520 r = mep_final_link_relocate (howto, input_bfd, input_section,
521 contents, rel, relocation);
522
523 if (r != bfd_reloc_ok)
524 {
525 const char * msg = (const char *) NULL;
526
527 switch (r)
528 {
529 case bfd_reloc_overflow:
530 r = info->callbacks->reloc_overflow
531 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
532 input_bfd, input_section, rel->r_offset);
533 break;
534
535 case bfd_reloc_undefined:
536 r = info->callbacks->undefined_symbol
537 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
538 break;
539
540 case bfd_reloc_outofrange:
541 msg = _("internal error: out of range error");
542 break;
543
544 case bfd_reloc_notsupported:
545 msg = _("internal error: unsupported relocation error");
546 break;
547
548 case bfd_reloc_dangerous:
549 msg = _("internal error: dangerous relocation");
550 break;
551
552 default:
553 msg = _("internal error: unknown error");
554 break;
555 }
556
557 if (msg)
558 r = info->callbacks->warning
559 (info, msg, name, input_bfd, input_section, rel->r_offset);
560
561 if (! r)
562 return FALSE;
563 }
564 }
565
566 if (warn_tp)
567 info->callbacks->undefined_symbol
568 (info, "__tpbase", input_bfd, input_section, warn_tp-1, TRUE);
569 if (warn_sda)
570 info->callbacks->undefined_symbol
571 (info, "__sdabase", input_bfd, input_section, warn_sda-1, TRUE);
572 if (warn_sda || warn_tp)
573 return FALSE;
574
575 return TRUE;
576 }
577 \f
578 /* Function to set the ELF flag bits. */
579
580 static bfd_boolean
581 mep_elf_set_private_flags (bfd * abfd,
582 flagword flags)
583 {
584 elf_elfheader (abfd)->e_flags = flags;
585 elf_flags_init (abfd) = TRUE;
586 return TRUE;
587 }
588
589 static bfd_boolean
590 mep_elf_copy_private_bfd_data (bfd * ibfd, bfd * obfd)
591 {
592 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
593 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
594 return TRUE;
595
596 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
597 elf_flags_init (obfd) = TRUE;
598
599 /* Copy object attributes. */
600 _bfd_elf_copy_obj_attributes (ibfd, obfd);
601
602 return TRUE;
603 }
604
605 /* Merge backend specific data from an object file to the output
606 object file when linking. */
607
608 static bfd_boolean
609 mep_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
610 {
611 static bfd *last_ibfd = 0;
612 flagword old_flags, new_flags;
613 flagword old_partial, new_partial;
614
615 /* Check if we have the same endianess. */
616 if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
617 return FALSE;
618
619 new_flags = elf_elfheader (ibfd)->e_flags;
620 old_flags = elf_elfheader (obfd)->e_flags;
621
622 #ifdef DEBUG
623 _bfd_error_handler ("%B: old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s",
624 ibfd, old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no");
625 #endif
626
627 /* First call, no flags set. */
628 if (!elf_flags_init (obfd))
629 {
630 elf_flags_init (obfd) = TRUE;
631 old_flags = new_flags;
632 }
633 else if ((new_flags | old_flags) & EF_MEP_LIBRARY)
634 {
635 /* Non-library flags trump library flags. The choice doesn't really
636 matter if both OLD_FLAGS and NEW_FLAGS have EF_MEP_LIBRARY set. */
637 if (old_flags & EF_MEP_LIBRARY)
638 old_flags = new_flags;
639 }
640 else
641 {
642 /* Make sure they're for the same mach. Allow upgrade from the "mep"
643 mach. */
644 new_partial = (new_flags & EF_MEP_CPU_MASK);
645 old_partial = (old_flags & EF_MEP_CPU_MASK);
646 if (new_partial == old_partial)
647 ;
648 else if (new_partial == EF_MEP_CPU_MEP)
649 ;
650 else if (old_partial == EF_MEP_CPU_MEP)
651 old_flags = (old_flags & ~EF_MEP_CPU_MASK) | new_partial;
652 else
653 {
654 _bfd_error_handler (_("%B and %B are for different cores"), last_ibfd, ibfd);
655 bfd_set_error (bfd_error_invalid_target);
656 return FALSE;
657 }
658
659 /* Make sure they're for the same me_module. Allow basic config to
660 mix with any other. */
661 new_partial = (new_flags & EF_MEP_INDEX_MASK);
662 old_partial = (old_flags & EF_MEP_INDEX_MASK);
663 if (new_partial == old_partial)
664 ;
665 else if (new_partial == 0)
666 ;
667 else if (old_partial == 0)
668 old_flags = (old_flags & ~EF_MEP_INDEX_MASK) | new_partial;
669 else
670 {
671 _bfd_error_handler (_("%B and %B are for different configurations"), last_ibfd, ibfd);
672 bfd_set_error (bfd_error_invalid_target);
673 return FALSE;
674 }
675 }
676
677 elf_elfheader (obfd)->e_flags = old_flags;
678 last_ibfd = ibfd;
679 return TRUE;
680 }
681
682 /* This will be edited by the MeP configration tool. */
683 static const char * config_names[] =
684 {
685 "basic"
686 /* start-mepcfgtool */
687 ,"default"
688 /* end-mepcfgtool */
689 };
690
691 static const char * core_names[] =
692 {
693 "MeP", "MeP-c2", "MeP-c3", "MeP-h1"
694 };
695
696 static bfd_boolean
697 mep_elf_print_private_bfd_data (bfd * abfd, void * ptr)
698 {
699 FILE * file = (FILE *) ptr;
700 flagword flags, partial_flags;
701
702 BFD_ASSERT (abfd != NULL && ptr != NULL);
703
704 /* Print normal ELF private data. */
705 _bfd_elf_print_private_bfd_data (abfd, ptr);
706
707 flags = elf_elfheader (abfd)->e_flags;
708 fprintf (file, _("private flags = 0x%lx"), (unsigned long) flags);
709
710 partial_flags = (flags & EF_MEP_CPU_MASK) >> 24;
711 if (partial_flags < ARRAY_SIZE (core_names))
712 fprintf (file, " core: %s", core_names[(long)partial_flags]);
713
714 partial_flags = flags & EF_MEP_INDEX_MASK;
715 if (partial_flags < ARRAY_SIZE (config_names))
716 fprintf (file, " me_module: %s", config_names[(long)partial_flags]);
717
718 fputc ('\n', file);
719
720 return TRUE;
721 }
722
723 /* Return the machine subcode from the ELF e_flags header. */
724
725 static int
726 elf32_mep_machine (bfd * abfd)
727 {
728 switch (elf_elfheader (abfd)->e_flags & EF_MEP_CPU_MASK)
729 {
730 default: break;
731 case EF_MEP_CPU_C2: return bfd_mach_mep;
732 case EF_MEP_CPU_C3: return bfd_mach_mep;
733 case EF_MEP_CPU_C4: return bfd_mach_mep;
734 case EF_MEP_CPU_C5: return bfd_mach_mep_c5;
735 case EF_MEP_CPU_H1: return bfd_mach_mep_h1;
736 }
737
738 return bfd_mach_mep;
739 }
740
741 static bfd_boolean
742 mep_elf_object_p (bfd * abfd)
743 {
744 bfd_default_set_arch_mach (abfd, bfd_arch_mep, elf32_mep_machine (abfd));
745 return TRUE;
746 }
747
748 static bfd_boolean
749 mep_elf_section_flags (flagword * flags, const Elf_Internal_Shdr * hdr)
750 {
751 if (hdr->sh_flags & SHF_MEP_VLIW)
752 * flags |= SEC_MEP_VLIW;
753 return TRUE;
754 }
755
756 static bfd_boolean
757 mep_elf_fake_sections (bfd * abfd ATTRIBUTE_UNUSED,
758 Elf_Internal_Shdr * hdr,
759 asection * sec)
760 {
761 if (sec->flags & SEC_MEP_VLIW)
762 hdr->sh_flags |= SHF_MEP_VLIW;
763 return TRUE;
764 }
765
766 \f
767 #define ELF_ARCH bfd_arch_mep
768 #define ELF_MACHINE_CODE EM_CYGNUS_MEP
769 #define ELF_MAXPAGESIZE 0x1000
770
771 #define TARGET_BIG_SYM bfd_elf32_mep_vec
772 #define TARGET_BIG_NAME "elf32-mep"
773
774 #define TARGET_LITTLE_SYM bfd_elf32_mep_little_vec
775 #define TARGET_LITTLE_NAME "elf32-mep-little"
776
777 #define elf_info_to_howto_rel NULL
778 #define elf_info_to_howto mep_info_to_howto_rela
779 #define elf_backend_relocate_section mep_elf_relocate_section
780 #define elf_backend_object_p mep_elf_object_p
781 #define elf_backend_section_flags mep_elf_section_flags
782 #define elf_backend_fake_sections mep_elf_fake_sections
783
784 #define bfd_elf32_bfd_reloc_type_lookup mep_reloc_type_lookup
785 #define bfd_elf32_bfd_reloc_name_lookup mep_reloc_name_lookup
786 #define bfd_elf32_bfd_set_private_flags mep_elf_set_private_flags
787 #define bfd_elf32_bfd_copy_private_bfd_data mep_elf_copy_private_bfd_data
788 #define bfd_elf32_bfd_merge_private_bfd_data mep_elf_merge_private_bfd_data
789 #define bfd_elf32_bfd_print_private_bfd_data mep_elf_print_private_bfd_data
790
791 #define elf_backend_rela_normal 1
792
793 #include "elf32-target.h"
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