1 /* MeP-specific support for 32-bit ELF.
2 Copyright (C) 2001-2021 Free Software Foundation, Inc.
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 3 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., 51 Franklin Street, Fifth Floor, Boston,
19 MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
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
32 #define MEPREL(type, size, bits, right, left, pcrel, overflow, mask) \
33 HOWTO (type, right, size, bits, pcrel, left, overflow, bfd_elf_generic_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 reloc_howto_type mep_elf_howto_table [] =
40 {
41 /* type, size, bits, leftshift, rightshift, pcrel, OD/OS/OU, mask. */
42 MEPREL (R_MEP_NONE, 3, 0, 0, 0, 0, N, 0),
43 MEPREL (R_RELC, 0, 0, 0, 0, 0, N, 0),
44 /* MEPRELOC:HOWTO */
45 /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
46 MEPREL (R_MEP_8, 0, 8, 0, 0, 0, U, 0xff),
47 MEPREL (R_MEP_16, 1, 16, 0, 0, 0, U, 0xffff),
48 MEPREL (R_MEP_32, 2, 32, 0, 0, 0, U, 0xffffffff),
49 MEPREL (R_MEP_PCREL8A2, 1, 8, 1, 1, 1, S, 0x00fe),
50 MEPREL (R_MEP_PCREL12A2,1, 12, 1, 1, 1, S, 0x0ffe),
51 MEPREL (R_MEP_PCREL17A2,2, 17, 0, 1, 1, S, 0x0000ffff),
52 MEPREL (R_MEP_PCREL24A2,2, 24, 0, 1, 1, S, 0x07f0ffff),
53 MEPREL (R_MEP_PCABS24A2,2, 24, 0, 1, 0, U, 0x07f0ffff),
54 MEPREL (R_MEP_LOW16, 2, 16, 0, 0, 0, N, 0x0000ffff),
55 MEPREL (R_MEP_HI16U, 2, 32, 0,16, 0, N, 0x0000ffff),
56 MEPREL (R_MEP_HI16S, 2, 32, 0,16, 0, N, 0x0000ffff),
57 MEPREL (R_MEP_GPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
58 MEPREL (R_MEP_TPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
59 MEPREL (R_MEP_TPREL7, 1, 7, 0, 0, 0, U, 0x007f),
60 MEPREL (R_MEP_TPREL7A2, 1, 7, 1, 1, 0, U, 0x007e),
61 MEPREL (R_MEP_TPREL7A4, 1, 7, 2, 2, 0, U, 0x007c),
62 MEPREL (R_MEP_UIMM24, 2, 24, 0, 0, 0, U, 0x00ffffff),
63 MEPREL (R_MEP_ADDR24A4, 2, 24, 0, 2, 0, U, 0x00fcffff),
64 MEPREL (R_MEP_GNU_VTINHERIT,1, 0,16,32, 0, N, 0x0000),
65 MEPREL (R_MEP_GNU_VTENTRY,1, 0,16,32, 0, N, 0x0000),
66 /* MEPRELOC:END */
67 };
68
69 #define VALID_MEP_RELOC(N) ((N) >= 0 \
70 && (N) < ARRAY_SIZE (mep_elf_howto_table)
71
72 #undef N
73 #undef S
74 #undef U
75
76
77 #define BFD_RELOC_MEP_NONE BFD_RELOC_NONE
78 #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
79 #define MAP(n) case BFD_RELOC_MEP_##n: type = R_MEP_##n; break
80 #else
81 #define MAP(n) case BFD_RELOC_MEP_/**/n: type = R_MEP_/**/n; break
82 #endif
83
84 static reloc_howto_type *
mep_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)85 mep_reloc_type_lookup
86 (bfd * abfd ATTRIBUTE_UNUSED,
87 bfd_reloc_code_real_type code)
88 {
89 unsigned int type = 0;
90
91 switch (code)
92 {
93 MAP(NONE);
94 case BFD_RELOC_8:
95 type = R_MEP_8;
96 break;
97 case BFD_RELOC_16:
98 type = R_MEP_16;
99 break;
100 case BFD_RELOC_32:
101 type = R_MEP_32;
102 break;
103 case BFD_RELOC_VTABLE_ENTRY:
104 type = R_MEP_GNU_VTENTRY;
105 break;
106 case BFD_RELOC_VTABLE_INHERIT:
107 type = R_MEP_GNU_VTINHERIT;
108 break;
109 case BFD_RELOC_RELC:
110 type = R_RELC;
111 break;
112
113 /* MEPRELOC:MAP */
114 /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
115 MAP(8);
116 MAP(16);
117 MAP(32);
118 MAP(PCREL8A2);
119 MAP(PCREL12A2);
120 MAP(PCREL17A2);
121 MAP(PCREL24A2);
122 MAP(PCABS24A2);
123 MAP(LOW16);
124 MAP(HI16U);
125 MAP(HI16S);
126 MAP(GPREL);
127 MAP(TPREL);
128 MAP(TPREL7);
129 MAP(TPREL7A2);
130 MAP(TPREL7A4);
131 MAP(UIMM24);
132 MAP(ADDR24A4);
133 MAP(GNU_VTINHERIT);
134 MAP(GNU_VTENTRY);
135 /* MEPRELOC:END */
136
137 default:
138 /* Pacify gcc -Wall. */
139 _bfd_error_handler (_("mep: no reloc for code %d"), code);
140 return NULL;
141 }
142
143 if (mep_elf_howto_table[type].type != type)
144 {
145 /* xgettext:c-format */
146 _bfd_error_handler (_("MeP: howto %d has type %d"),
147 type, mep_elf_howto_table[type].type);
148 abort ();
149 }
150
151 return mep_elf_howto_table + type;
152 }
153
154 #undef MAP
155
156 static reloc_howto_type *
mep_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)157 mep_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
158 {
159 unsigned int i;
160
161 for (i = 0;
162 i < sizeof (mep_elf_howto_table) / sizeof (mep_elf_howto_table[0]);
163 i++)
164 if (mep_elf_howto_table[i].name != NULL
165 && strcasecmp (mep_elf_howto_table[i].name, r_name) == 0)
166 return &mep_elf_howto_table[i];
167
168 return NULL;
169 }
170
171 /* Perform a single relocation. */
172
173 static struct bfd_link_info *mep_info;
174 static int warn_tp = 0, warn_sda = 0;
175
176 static bfd_vma
mep_lookup_global(char * name,bfd_vma ofs,bfd_vma * cache,int * warn)177 mep_lookup_global
178 (char * name,
179 bfd_vma ofs,
180 bfd_vma * cache,
181 int * warn)
182 {
183 struct bfd_link_hash_entry *h;
184
185 if (*cache || *warn)
186 return *cache;
187
188 h = bfd_link_hash_lookup (mep_info->hash, name, false, false, true);
189 if (h == 0 || h->type != bfd_link_hash_defined)
190 {
191 *warn = ofs + 1;
192 return 0;
193 }
194 *cache = (h->u.def.value
195 + h->u.def.section->output_section->vma
196 + h->u.def.section->output_offset);
197 return *cache;
198 }
199
200 static bfd_vma
mep_tpoff_base(bfd_vma ofs)201 mep_tpoff_base (bfd_vma ofs)
202 {
203 static bfd_vma cache = 0;
204 return mep_lookup_global ("__tpbase", ofs, &cache, &warn_tp);
205 }
206
207 static bfd_vma
mep_sdaoff_base(bfd_vma ofs)208 mep_sdaoff_base (bfd_vma ofs)
209 {
210 static bfd_vma cache = 0;
211 return mep_lookup_global ("__sdabase", ofs, &cache, &warn_sda);
212 }
213
214 static bfd_reloc_status_type
mep_final_link_relocate(reloc_howto_type * howto,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * rel,bfd_vma relocation)215 mep_final_link_relocate
216 (reloc_howto_type * howto,
217 bfd * input_bfd,
218 asection * input_section,
219 bfd_byte * contents,
220 Elf_Internal_Rela * rel,
221 bfd_vma relocation)
222 {
223 unsigned long u;
224 unsigned char *byte;
225 bfd_vma pc;
226 bfd_reloc_status_type r = bfd_reloc_ok;
227 int e2, e4;
228
229 if (bfd_big_endian (input_bfd))
230 {
231 e2 = 0;
232 e4 = 0;
233 }
234 else
235 {
236 e2 = 1;
237 e4 = 3;
238 }
239
240 pc = (input_section->output_section->vma
241 + input_section->output_offset
242 + rel->r_offset);
243
244 u = relocation + rel->r_addend;
245
246 byte = (unsigned char *)contents + rel->r_offset;
247
248 if (howto->type == R_MEP_PCREL24A2
249 && u == 0
250 && pc >= 0x800000)
251 {
252 /* This is an unreachable branch to an undefined weak function.
253 Silently ignore it, since the opcode can't do that but should
254 never be executed anyway. */
255 return bfd_reloc_ok;
256 }
257
258 if (howto->pc_relative)
259 u -= pc;
260
261 switch (howto->type)
262 {
263 /* MEPRELOC:APPLY */
264 /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
265 case R_MEP_8: /* 76543210 */
266 if (u > 255) r = bfd_reloc_overflow;
267 byte[0] = (u & 0xff);
268 break;
269 case R_MEP_16: /* fedcba9876543210 */
270 if (u > 65535) r = bfd_reloc_overflow;
271 byte[0^e2] = ((u >> 8) & 0xff);
272 byte[1^e2] = (u & 0xff);
273 break;
274 case R_MEP_32: /* vutsrqponmlkjihgfedcba9876543210 */
275 byte[0^e4] = ((u >> 24) & 0xff);
276 byte[1^e4] = ((u >> 16) & 0xff);
277 byte[2^e4] = ((u >> 8) & 0xff);
278 byte[3^e4] = (u & 0xff);
279 break;
280 case R_MEP_PCREL8A2: /* --------7654321- */
281 if (u + 128 > 255) r = bfd_reloc_overflow;
282 byte[1^e2] = (byte[1^e2] & 0x01) | (u & 0xfe);
283 break;
284 case R_MEP_PCREL12A2: /* ----ba987654321- */
285 if (u + 2048 > 4095) r = bfd_reloc_overflow;
286 byte[0^e2] = (byte[0^e2] & 0xf0) | ((u >> 8) & 0x0f);
287 byte[1^e2] = (byte[1^e2] & 0x01) | (u & 0xfe);
288 break;
289 case R_MEP_PCREL17A2: /* ----------------gfedcba987654321 */
290 if (u + 65536 > 131071) r = bfd_reloc_overflow;
291 byte[2^e2] = ((u >> 9) & 0xff);
292 byte[3^e2] = ((u >> 1) & 0xff);
293 break;
294 case R_MEP_PCREL24A2: /* -----7654321----nmlkjihgfedcba98 */
295 if (u + 8388608 > 16777215) r = bfd_reloc_overflow;
296 byte[0^e2] = (byte[0^e2] & 0xf8) | ((u >> 5) & 0x07);
297 byte[1^e2] = (byte[1^e2] & 0x0f) | ((u << 3) & 0xf0);
298 byte[2^e2] = ((u >> 16) & 0xff);
299 byte[3^e2] = ((u >> 8) & 0xff);
300 break;
301 case R_MEP_PCABS24A2: /* -----7654321----nmlkjihgfedcba98 */
302 if (u > 16777215) r = bfd_reloc_overflow;
303 byte[0^e2] = (byte[0^e2] & 0xf8) | ((u >> 5) & 0x07);
304 byte[1^e2] = (byte[1^e2] & 0x0f) | ((u << 3) & 0xf0);
305 byte[2^e2] = ((u >> 16) & 0xff);
306 byte[3^e2] = ((u >> 8) & 0xff);
307 break;
308 case R_MEP_LOW16: /* ----------------fedcba9876543210 */
309 byte[2^e2] = ((u >> 8) & 0xff);
310 byte[3^e2] = (u & 0xff);
311 break;
312 case R_MEP_HI16U: /* ----------------vutsrqponmlkjihg */
313 byte[2^e2] = ((u >> 24) & 0xff);
314 byte[3^e2] = ((u >> 16) & 0xff);
315 break;
316 case R_MEP_HI16S: /* ----------------vutsrqponmlkjihg */
317 u += 0x8000;
318 byte[2^e2] = ((u >> 24) & 0xff);
319 byte[3^e2] = ((u >> 16) & 0xff);
320 break;
321 case R_MEP_GPREL: /* ----------------fedcba9876543210 */
322 u -= mep_sdaoff_base(rel->r_offset);
323 if (u + 32768 > 65535) r = bfd_reloc_overflow;
324 byte[2^e2] = ((u >> 8) & 0xff);
325 byte[3^e2] = (u & 0xff);
326 break;
327 case R_MEP_TPREL: /* ----------------fedcba9876543210 */
328 u -= mep_tpoff_base(rel->r_offset);
329 if (u + 32768 > 65535) r = bfd_reloc_overflow;
330 byte[2^e2] = ((u >> 8) & 0xff);
331 byte[3^e2] = (u & 0xff);
332 break;
333 case R_MEP_TPREL7: /* ---------6543210 */
334 u -= mep_tpoff_base(rel->r_offset);
335 if (u > 127) r = bfd_reloc_overflow;
336 byte[1^e2] = (byte[1^e2] & 0x80) | (u & 0x7f);
337 break;
338 case R_MEP_TPREL7A2: /* ---------654321- */
339 u -= mep_tpoff_base(rel->r_offset);
340 if (u > 127) r = bfd_reloc_overflow;
341 byte[1^e2] = (byte[1^e2] & 0x81) | (u & 0x7e);
342 break;
343 case R_MEP_TPREL7A4: /* ---------65432-- */
344 u -= mep_tpoff_base(rel->r_offset);
345 if (u > 127) r = bfd_reloc_overflow;
346 byte[1^e2] = (byte[1^e2] & 0x83) | (u & 0x7c);
347 break;
348 case R_MEP_UIMM24: /* --------76543210nmlkjihgfedcba98 */
349 if (u > 16777215) r = bfd_reloc_overflow;
350 byte[1^e2] = (u & 0xff);
351 byte[2^e2] = ((u >> 16) & 0xff);
352 byte[3^e2] = ((u >> 8) & 0xff);
353 break;
354 case R_MEP_ADDR24A4: /* --------765432--nmlkjihgfedcba98 */
355 if (u > 16777215) r = bfd_reloc_overflow;
356 byte[1^e2] = (byte[1^e2] & 0x03) | (u & 0xfc);
357 byte[2^e2] = ((u >> 16) & 0xff);
358 byte[3^e2] = ((u >> 8) & 0xff);
359 break;
360 case R_MEP_GNU_VTINHERIT: /* ---------------- */
361 break;
362 case R_MEP_GNU_VTENTRY: /* ---------------- */
363 break;
364 /* MEPRELOC:END */
365 default:
366 abort ();
367 }
368
369 return r;
370 }
371
372 /* Set the howto pointer for a MEP ELF reloc. */
373
374 static bool
mep_info_to_howto_rela(bfd * abfd,arelent * cache_ptr,Elf_Internal_Rela * dst)375 mep_info_to_howto_rela (bfd * abfd,
376 arelent * cache_ptr,
377 Elf_Internal_Rela * dst)
378 {
379 unsigned int r_type;
380
381 r_type = ELF32_R_TYPE (dst->r_info);
382 if (r_type >= R_MEP_max)
383 {
384 /* xgettext:c-format */
385 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
386 abfd, r_type);
387 bfd_set_error (bfd_error_bad_value);
388 return false;
389 }
390 cache_ptr->howto = & mep_elf_howto_table [r_type];
391 return true;
392 }
393
394 /* Relocate a MEP ELF section.
395 There is some attempt to make this function usable for many architectures,
396 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
397 if only to serve as a learning tool.
398
399 The RELOCATE_SECTION function is called by the new ELF backend linker
400 to handle the relocations for a section.
401
402 The relocs are always passed as Rela structures; if the section
403 actually uses Rel structures, the r_addend field will always be
404 zero.
405
406 This function is responsible for adjusting the section contents as
407 necessary, and (if using Rela relocs and generating a relocatable
408 output file) adjusting the reloc addend as necessary.
409
410 This function does not have to worry about setting the reloc
411 address or the reloc symbol index.
412
413 LOCAL_SYMS is a pointer to the swapped in local symbols.
414
415 LOCAL_SECTIONS is an array giving the section in the input file
416 corresponding to the st_shndx field of each local symbol.
417
418 The global hash table entry for the global symbols can be found
419 via elf_sym_hashes (input_bfd).
420
421 When generating relocatable output, this function must handle
422 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
423 going to be the section symbol corresponding to the output
424 section, which means that the addend must be adjusted
425 accordingly. */
426
427 static int
mep_elf_relocate_section(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)428 mep_elf_relocate_section
429 (bfd * output_bfd ATTRIBUTE_UNUSED,
430 struct bfd_link_info * info,
431 bfd * input_bfd,
432 asection * input_section,
433 bfd_byte * contents,
434 Elf_Internal_Rela * relocs,
435 Elf_Internal_Sym * local_syms,
436 asection ** local_sections)
437 {
438 Elf_Internal_Shdr * symtab_hdr;
439 struct elf_link_hash_entry ** sym_hashes;
440 Elf_Internal_Rela * rel;
441 Elf_Internal_Rela * relend;
442
443 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
444 sym_hashes = elf_sym_hashes (input_bfd);
445 relend = relocs + input_section->reloc_count;
446
447 mep_info = info;
448
449 for (rel = relocs; rel < relend; rel ++)
450 {
451 reloc_howto_type * howto;
452 unsigned long r_symndx;
453 Elf_Internal_Sym * sym;
454 asection * sec;
455 struct elf_link_hash_entry * h;
456 bfd_vma relocation;
457 bfd_reloc_status_type r;
458 const char * name = NULL;
459 int r_type;
460
461 r_type = ELF32_R_TYPE (rel->r_info);
462 r_symndx = ELF32_R_SYM (rel->r_info);
463 howto = mep_elf_howto_table + ELF32_R_TYPE (rel->r_info);
464 h = NULL;
465 sym = NULL;
466 sec = NULL;
467
468 if (r_symndx < symtab_hdr->sh_info)
469 {
470 sym = local_syms + r_symndx;
471 sec = local_sections [r_symndx];
472 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
473
474 name = bfd_elf_string_from_elf_section
475 (input_bfd, symtab_hdr->sh_link, sym->st_name);
476 name = name == NULL ? bfd_section_name (sec) : name;
477 }
478 else
479 {
480 bool warned, unresolved_reloc, ignored;
481
482 RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel,
483 r_symndx, symtab_hdr, sym_hashes,
484 h, sec, relocation,
485 unresolved_reloc, warned, ignored);
486
487 name = h->root.root.string;
488 }
489
490 if (sec != NULL && discarded_section (sec))
491 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
492 rel, 1, relend, howto, 0, contents);
493
494 if (bfd_link_relocatable (info))
495 continue;
496
497 if (r_type == R_RELC)
498 r = bfd_elf_perform_complex_relocation (input_bfd, input_section,
499 contents, rel, relocation);
500 else
501 r = mep_final_link_relocate (howto, input_bfd, input_section,
502 contents, rel, relocation);
503
504 if (r != bfd_reloc_ok)
505 {
506 const char * msg = (const char *) NULL;
507
508 switch (r)
509 {
510 case bfd_reloc_overflow:
511 (*info->callbacks->reloc_overflow)
512 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
513 input_bfd, input_section, rel->r_offset);
514 break;
515
516 case bfd_reloc_undefined:
517 (*info->callbacks->undefined_symbol)
518 (info, name, input_bfd, input_section, rel->r_offset, true);
519 break;
520
521 case bfd_reloc_outofrange:
522 msg = _("internal error: out of range error");
523 break;
524
525 case bfd_reloc_notsupported:
526 msg = _("internal error: unsupported relocation error");
527 break;
528
529 case bfd_reloc_dangerous:
530 msg = _("internal error: dangerous relocation");
531 break;
532
533 default:
534 msg = _("internal error: unknown error");
535 break;
536 }
537
538 if (msg)
539 (*info->callbacks->warning) (info, msg, name, input_bfd,
540 input_section, rel->r_offset);
541 }
542 }
543
544 if (warn_tp)
545 info->callbacks->undefined_symbol
546 (info, "__tpbase", input_bfd, input_section, warn_tp-1, true);
547 if (warn_sda)
548 info->callbacks->undefined_symbol
549 (info, "__sdabase", input_bfd, input_section, warn_sda-1, true);
550 if (warn_sda || warn_tp)
551 return false;
552
553 return true;
554 }
555
556 /* Function to set the ELF flag bits. */
557
558 static bool
mep_elf_set_private_flags(bfd * abfd,flagword flags)559 mep_elf_set_private_flags (bfd * abfd,
560 flagword flags)
561 {
562 elf_elfheader (abfd)->e_flags = flags;
563 elf_flags_init (abfd) = true;
564 return true;
565 }
566
567 /* Merge backend specific data from an object file to the output
568 object file when linking. */
569
570 static bool
mep_elf_merge_private_bfd_data(bfd * ibfd,struct bfd_link_info * info)571 mep_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
572 {
573 bfd *obfd = info->output_bfd;
574 static bfd *last_ibfd = 0;
575 flagword old_flags, new_flags;
576 flagword old_partial, new_partial;
577
578 /* Check if we have the same endianness. */
579 if (!_bfd_generic_verify_endian_match (ibfd, info))
580 return false;
581
582 new_flags = elf_elfheader (ibfd)->e_flags;
583 old_flags = elf_elfheader (obfd)->e_flags;
584
585 #ifdef DEBUG
586 _bfd_error_handler ("%pB: old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s",
587 ibfd, old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no");
588 #endif
589
590 /* First call, no flags set. */
591 if (!elf_flags_init (obfd))
592 {
593 elf_flags_init (obfd) = true;
594 old_flags = new_flags;
595 }
596 else if ((new_flags | old_flags) & EF_MEP_LIBRARY)
597 {
598 /* Non-library flags trump library flags. The choice doesn't really
599 matter if both OLD_FLAGS and NEW_FLAGS have EF_MEP_LIBRARY set. */
600 if (old_flags & EF_MEP_LIBRARY)
601 old_flags = new_flags;
602 }
603 else
604 {
605 /* Make sure they're for the same mach. Allow upgrade from the "mep"
606 mach. */
607 new_partial = (new_flags & EF_MEP_CPU_MASK);
608 old_partial = (old_flags & EF_MEP_CPU_MASK);
609 if (new_partial == old_partial)
610 ;
611 else if (new_partial == EF_MEP_CPU_MEP)
612 ;
613 else if (old_partial == EF_MEP_CPU_MEP)
614 old_flags = (old_flags & ~EF_MEP_CPU_MASK) | new_partial;
615 else
616 {
617 /* xgettext:c-format */
618 _bfd_error_handler (_("%pB and %pB are for different cores"),
619 last_ibfd, ibfd);
620 bfd_set_error (bfd_error_invalid_target);
621 return false;
622 }
623
624 /* Make sure they're for the same me_module. Allow basic config to
625 mix with any other. */
626 new_partial = (new_flags & EF_MEP_INDEX_MASK);
627 old_partial = (old_flags & EF_MEP_INDEX_MASK);
628 if (new_partial == old_partial)
629 ;
630 else if (new_partial == 0)
631 ;
632 else if (old_partial == 0)
633 old_flags = (old_flags & ~EF_MEP_INDEX_MASK) | new_partial;
634 else
635 {
636 /* xgettext:c-format */
637 _bfd_error_handler (_("%pB and %pB are for different configurations"),
638 last_ibfd, ibfd);
639 bfd_set_error (bfd_error_invalid_target);
640 return false;
641 }
642 }
643
644 elf_elfheader (obfd)->e_flags = old_flags;
645 last_ibfd = ibfd;
646 return true;
647 }
648
649 /* This will be edited by the MeP configration tool. */
650 static const char * config_names[] =
651 {
652 "basic"
653 /* start-mepcfgtool */
654 ,"default"
655 /* end-mepcfgtool */
656 };
657
658 static const char * core_names[] =
659 {
660 "MeP", "MeP-c2", "MeP-c3", "MeP-h1"
661 };
662
663 static bool
mep_elf_print_private_bfd_data(bfd * abfd,void * ptr)664 mep_elf_print_private_bfd_data (bfd * abfd, void * ptr)
665 {
666 FILE * file = (FILE *) ptr;
667 flagword flags, partial_flags;
668
669 BFD_ASSERT (abfd != NULL && ptr != NULL);
670
671 /* Print normal ELF private data. */
672 _bfd_elf_print_private_bfd_data (abfd, ptr);
673
674 flags = elf_elfheader (abfd)->e_flags;
675 fprintf (file, _("private flags = 0x%lx"), (unsigned long) flags);
676
677 partial_flags = (flags & EF_MEP_CPU_MASK) >> 24;
678 if (partial_flags < ARRAY_SIZE (core_names))
679 fprintf (file, " core: %s", core_names[(long)partial_flags]);
680
681 partial_flags = flags & EF_MEP_INDEX_MASK;
682 if (partial_flags < ARRAY_SIZE (config_names))
683 fprintf (file, " me_module: %s", config_names[(long)partial_flags]);
684
685 fputc ('\n', file);
686
687 return true;
688 }
689
690 /* Return the machine subcode from the ELF e_flags header. */
691
692 static int
elf32_mep_machine(bfd * abfd)693 elf32_mep_machine (bfd * abfd)
694 {
695 switch (elf_elfheader (abfd)->e_flags & EF_MEP_CPU_MASK)
696 {
697 default: break;
698 case EF_MEP_CPU_C2: return bfd_mach_mep;
699 case EF_MEP_CPU_C3: return bfd_mach_mep;
700 case EF_MEP_CPU_C4: return bfd_mach_mep;
701 case EF_MEP_CPU_C5: return bfd_mach_mep_c5;
702 case EF_MEP_CPU_H1: return bfd_mach_mep_h1;
703 }
704
705 return bfd_mach_mep;
706 }
707
708 static bool
mep_elf_object_p(bfd * abfd)709 mep_elf_object_p (bfd * abfd)
710 {
711 bfd_default_set_arch_mach (abfd, bfd_arch_mep, elf32_mep_machine (abfd));
712 return true;
713 }
714
715 static bool
mep_elf_section_flags(const Elf_Internal_Shdr * hdr)716 mep_elf_section_flags (const Elf_Internal_Shdr *hdr)
717 {
718 if (hdr->sh_flags & SHF_MEP_VLIW)
719 hdr->bfd_section->flags |= SEC_MEP_VLIW;
720 return true;
721 }
722
723 static bool
mep_elf_fake_sections(bfd * abfd ATTRIBUTE_UNUSED,Elf_Internal_Shdr * hdr,asection * sec)724 mep_elf_fake_sections (bfd * abfd ATTRIBUTE_UNUSED,
725 Elf_Internal_Shdr * hdr,
726 asection * sec)
727 {
728 if (sec->flags & SEC_MEP_VLIW)
729 hdr->sh_flags |= SHF_MEP_VLIW;
730 return true;
731 }
732
733
734 #define ELF_ARCH bfd_arch_mep
735 #define ELF_MACHINE_CODE EM_CYGNUS_MEP
736 #define ELF_MAXPAGESIZE 0x1000
737
738 #define TARGET_BIG_SYM mep_elf32_vec
739 #define TARGET_BIG_NAME "elf32-mep"
740
741 #define TARGET_LITTLE_SYM mep_elf32_le_vec
742 #define TARGET_LITTLE_NAME "elf32-mep-little"
743
744 #define elf_info_to_howto_rel NULL
745 #define elf_info_to_howto mep_info_to_howto_rela
746 #define elf_backend_relocate_section mep_elf_relocate_section
747 #define elf_backend_object_p mep_elf_object_p
748 #define elf_backend_section_flags mep_elf_section_flags
749 #define elf_backend_fake_sections mep_elf_fake_sections
750
751 #define bfd_elf32_bfd_reloc_type_lookup mep_reloc_type_lookup
752 #define bfd_elf32_bfd_reloc_name_lookup mep_reloc_name_lookup
753 #define bfd_elf32_bfd_set_private_flags mep_elf_set_private_flags
754 #define bfd_elf32_bfd_merge_private_bfd_data mep_elf_merge_private_bfd_data
755 #define bfd_elf32_bfd_print_private_bfd_data mep_elf_print_private_bfd_data
756
757 #define elf_backend_rela_normal 1
758
759 #include "elf32-target.h"
760