projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Fix illegal memory access parsing a corrupt MACH-O format file.
[deliverable/binutils-gdb.git] / bfd / elfxx-riscv.c
1 /* RISC-V-specific support for ELF.
2 Copyright (C) 2011-2021 Free Software Foundation, Inc.
3
4 Contributed by Andrew Waterman (andrew@sifive.com).
5 Based on TILE-Gx and MIPS targets.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; see the file COPYING3. If not,
21 see <http://www.gnu.org/licenses/>. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27 #include "elf/riscv.h"
28 #include "opcode/riscv.h"
29 #include "libiberty.h"
30 #include "elfxx-riscv.h"
31 #include "safe-ctype.h"
32 #include "cpu-riscv.h"
33
34 #define MINUS_ONE ((bfd_vma)0 - 1)
35
36 /* Special handler for ADD/SUB relocations that allows them to be filled out
37 both in the pre-linked and post-linked file. This is necessary to make
38 pre-linked debug info work, as due to linker relaxations we need to emit
39 relocations for the debug info. */
40 static bfd_reloc_status_type riscv_elf_add_sub_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42
43 /* The relocation table used for SHT_RELA sections. */
44
45 static reloc_howto_type howto_table[] =
46 {
47 /* No relocation. */
48 HOWTO (R_RISCV_NONE, /* type */
49 0, /* rightshift */
50 3, /* size */
51 0, /* bitsize */
52 false, /* pc_relative */
53 0, /* bitpos */
54 complain_overflow_dont, /* complain_on_overflow */
55 bfd_elf_generic_reloc, /* special_function */
56 "R_RISCV_NONE", /* name */
57 false, /* partial_inplace */
58 0, /* src_mask */
59 0, /* dst_mask */
60 false), /* pcrel_offset */
61
62 /* 32 bit relocation. */
63 HOWTO (R_RISCV_32, /* type */
64 0, /* rightshift */
65 2, /* size */
66 32, /* bitsize */
67 false, /* pc_relative */
68 0, /* bitpos */
69 complain_overflow_dont, /* complain_on_overflow */
70 bfd_elf_generic_reloc, /* special_function */
71 "R_RISCV_32", /* name */
72 false, /* partial_inplace */
73 0, /* src_mask */
74 0xffffffff, /* dst_mask */
75 false), /* pcrel_offset */
76
77 /* 64 bit relocation. */
78 HOWTO (R_RISCV_64, /* type */
79 0, /* rightshift */
80 4, /* size */
81 64, /* bitsize */
82 false, /* pc_relative */
83 0, /* bitpos */
84 complain_overflow_dont, /* complain_on_overflow */
85 bfd_elf_generic_reloc, /* special_function */
86 "R_RISCV_64", /* name */
87 false, /* partial_inplace */
88 0, /* src_mask */
89 MINUS_ONE, /* dst_mask */
90 false), /* pcrel_offset */
91
92 /* Relocation against a local symbol in a shared object. */
93 HOWTO (R_RISCV_RELATIVE, /* type */
94 0, /* rightshift */
95 2, /* size */
96 32, /* bitsize */
97 false, /* pc_relative */
98 0, /* bitpos */
99 complain_overflow_dont, /* complain_on_overflow */
100 bfd_elf_generic_reloc, /* special_function */
101 "R_RISCV_RELATIVE", /* name */
102 false, /* partial_inplace */
103 0, /* src_mask */
104 0xffffffff, /* dst_mask */
105 false), /* pcrel_offset */
106
107 HOWTO (R_RISCV_COPY, /* type */
108 0, /* rightshift */
109 0, /* this one is variable size */
110 0, /* bitsize */
111 false, /* pc_relative */
112 0, /* bitpos */
113 complain_overflow_bitfield, /* complain_on_overflow */
114 bfd_elf_generic_reloc, /* special_function */
115 "R_RISCV_COPY", /* name */
116 false, /* partial_inplace */
117 0, /* src_mask */
118 0, /* dst_mask */
119 false), /* pcrel_offset */
120
121 HOWTO (R_RISCV_JUMP_SLOT, /* type */
122 0, /* rightshift */
123 4, /* size */
124 64, /* bitsize */
125 false, /* pc_relative */
126 0, /* bitpos */
127 complain_overflow_bitfield, /* complain_on_overflow */
128 bfd_elf_generic_reloc, /* special_function */
129 "R_RISCV_JUMP_SLOT", /* name */
130 false, /* partial_inplace */
131 0, /* src_mask */
132 0, /* dst_mask */
133 false), /* pcrel_offset */
134
135 /* Dynamic TLS relocations. */
136 HOWTO (R_RISCV_TLS_DTPMOD32, /* type */
137 0, /* rightshift */
138 2, /* size */
139 32, /* bitsize */
140 false, /* pc_relative */
141 0, /* bitpos */
142 complain_overflow_dont, /* complain_on_overflow */
143 bfd_elf_generic_reloc, /* special_function */
144 "R_RISCV_TLS_DTPMOD32", /* name */
145 false, /* partial_inplace */
146 0, /* src_mask */
147 0xffffffff, /* dst_mask */
148 false), /* pcrel_offset */
149
150 HOWTO (R_RISCV_TLS_DTPMOD64, /* type */
151 0, /* rightshift */
152 4, /* size */
153 64, /* bitsize */
154 false, /* pc_relative */
155 0, /* bitpos */
156 complain_overflow_dont, /* complain_on_overflow */
157 bfd_elf_generic_reloc, /* special_function */
158 "R_RISCV_TLS_DTPMOD64", /* name */
159 false, /* partial_inplace */
160 0, /* src_mask */
161 MINUS_ONE, /* dst_mask */
162 false), /* pcrel_offset */
163
164 HOWTO (R_RISCV_TLS_DTPREL32, /* type */
165 0, /* rightshift */
166 2, /* size */
167 32, /* bitsize */
168 false, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_dont, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_RISCV_TLS_DTPREL32", /* name */
173 true, /* partial_inplace */
174 0, /* src_mask */
175 0xffffffff, /* dst_mask */
176 false), /* pcrel_offset */
177
178 HOWTO (R_RISCV_TLS_DTPREL64, /* type */
179 0, /* rightshift */
180 4, /* size */
181 64, /* bitsize */
182 false, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_dont, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_RISCV_TLS_DTPREL64", /* name */
187 true, /* partial_inplace */
188 0, /* src_mask */
189 MINUS_ONE, /* dst_mask */
190 false), /* pcrel_offset */
191
192 HOWTO (R_RISCV_TLS_TPREL32, /* type */
193 0, /* rightshift */
194 2, /* size */
195 32, /* bitsize */
196 false, /* pc_relative */
197 0, /* bitpos */
198 complain_overflow_dont, /* complain_on_overflow */
199 bfd_elf_generic_reloc, /* special_function */
200 "R_RISCV_TLS_TPREL32", /* name */
201 false, /* partial_inplace */
202 0, /* src_mask */
203 0xffffffff, /* dst_mask */
204 false), /* pcrel_offset */
205
206 HOWTO (R_RISCV_TLS_TPREL64, /* type */
207 0, /* rightshift */
208 4, /* size */
209 64, /* bitsize */
210 false, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_RISCV_TLS_TPREL64", /* name */
215 false, /* partial_inplace */
216 0, /* src_mask */
217 MINUS_ONE, /* dst_mask */
218 false), /* pcrel_offset */
219
220 /* Reserved for future relocs that the dynamic linker must understand. */
221 EMPTY_HOWTO (12),
222 EMPTY_HOWTO (13),
223 EMPTY_HOWTO (14),
224 EMPTY_HOWTO (15),
225
226 /* 12-bit PC-relative branch offset. */
227 HOWTO (R_RISCV_BRANCH, /* type */
228 0, /* rightshift */
229 2, /* size */
230 32, /* bitsize */
231 true, /* pc_relative */
232 0, /* bitpos */
233 complain_overflow_signed, /* complain_on_overflow */
234 bfd_elf_generic_reloc, /* special_function */
235 "R_RISCV_BRANCH", /* name */
236 false, /* partial_inplace */
237 0, /* src_mask */
238 ENCODE_BTYPE_IMM (-1U), /* dst_mask */
239 true), /* pcrel_offset */
240
241 /* 20-bit PC-relative jump offset. */
242 HOWTO (R_RISCV_JAL, /* type */
243 0, /* rightshift */
244 2, /* size */
245 32, /* bitsize */
246 true, /* pc_relative */
247 0, /* bitpos */
248 complain_overflow_dont, /* complain_on_overflow */
249 bfd_elf_generic_reloc, /* special_function */
250 "R_RISCV_JAL", /* name */
251 false, /* partial_inplace */
252 0, /* src_mask */
253 ENCODE_JTYPE_IMM (-1U), /* dst_mask */
254 true), /* pcrel_offset */
255
256 /* 32-bit PC-relative function call (AUIPC/JALR). */
257 HOWTO (R_RISCV_CALL, /* type */
258 0, /* rightshift */
259 4, /* size */
260 64, /* bitsize */
261 true, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_dont, /* complain_on_overflow */
264 bfd_elf_generic_reloc, /* special_function */
265 "R_RISCV_CALL", /* name */
266 false, /* partial_inplace */
267 0, /* src_mask */
268 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
269 /* dst_mask */
270 true), /* pcrel_offset */
271
272 /* Like R_RISCV_CALL, but not locally binding. */
273 HOWTO (R_RISCV_CALL_PLT, /* type */
274 0, /* rightshift */
275 4, /* size */
276 64, /* bitsize */
277 true, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_dont, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_RISCV_CALL_PLT", /* name */
282 false, /* partial_inplace */
283 0, /* src_mask */
284 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
285 /* dst_mask */
286 true), /* pcrel_offset */
287
288 /* High 20 bits of 32-bit PC-relative GOT access. */
289 HOWTO (R_RISCV_GOT_HI20, /* type */
290 0, /* rightshift */
291 2, /* size */
292 32, /* bitsize */
293 true, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_dont, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_RISCV_GOT_HI20", /* name */
298 false, /* partial_inplace */
299 0, /* src_mask */
300 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
301 false), /* pcrel_offset */
302
303 /* High 20 bits of 32-bit PC-relative TLS IE GOT access. */
304 HOWTO (R_RISCV_TLS_GOT_HI20, /* type */
305 0, /* rightshift */
306 2, /* size */
307 32, /* bitsize */
308 true, /* pc_relative */
309 0, /* bitpos */
310 complain_overflow_dont, /* complain_on_overflow */
311 bfd_elf_generic_reloc, /* special_function */
312 "R_RISCV_TLS_GOT_HI20", /* name */
313 false, /* partial_inplace */
314 0, /* src_mask */
315 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
316 false), /* pcrel_offset */
317
318 /* High 20 bits of 32-bit PC-relative TLS GD GOT reference. */
319 HOWTO (R_RISCV_TLS_GD_HI20, /* type */
320 0, /* rightshift */
321 2, /* size */
322 32, /* bitsize */
323 true, /* pc_relative */
324 0, /* bitpos */
325 complain_overflow_dont, /* complain_on_overflow */
326 bfd_elf_generic_reloc, /* special_function */
327 "R_RISCV_TLS_GD_HI20", /* name */
328 false, /* partial_inplace */
329 0, /* src_mask */
330 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
331 false), /* pcrel_offset */
332
333 /* High 20 bits of 32-bit PC-relative reference. */
334 HOWTO (R_RISCV_PCREL_HI20, /* type */
335 0, /* rightshift */
336 2, /* size */
337 32, /* bitsize */
338 true, /* pc_relative */
339 0, /* bitpos */
340 complain_overflow_dont, /* complain_on_overflow */
341 bfd_elf_generic_reloc, /* special_function */
342 "R_RISCV_PCREL_HI20", /* name */
343 false, /* partial_inplace */
344 0, /* src_mask */
345 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
346 true), /* pcrel_offset */
347
348 /* Low 12 bits of a 32-bit PC-relative load or add. */
349 HOWTO (R_RISCV_PCREL_LO12_I, /* type */
350 0, /* rightshift */
351 2, /* size */
352 32, /* bitsize */
353 false, /* pc_relative */
354 0, /* bitpos */
355 complain_overflow_dont, /* complain_on_overflow */
356 bfd_elf_generic_reloc, /* special_function */
357 "R_RISCV_PCREL_LO12_I", /* name */
358 false, /* partial_inplace */
359 0, /* src_mask */
360 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
361 false), /* pcrel_offset */
362
363 /* Low 12 bits of a 32-bit PC-relative store. */
364 HOWTO (R_RISCV_PCREL_LO12_S, /* type */
365 0, /* rightshift */
366 2, /* size */
367 32, /* bitsize */
368 false, /* pc_relative */
369 0, /* bitpos */
370 complain_overflow_dont, /* complain_on_overflow */
371 bfd_elf_generic_reloc, /* special_function */
372 "R_RISCV_PCREL_LO12_S", /* name */
373 false, /* partial_inplace */
374 0, /* src_mask */
375 ENCODE_STYPE_IMM (-1U), /* dst_mask */
376 false), /* pcrel_offset */
377
378 /* High 20 bits of 32-bit absolute address. */
379 HOWTO (R_RISCV_HI20, /* type */
380 0, /* rightshift */
381 2, /* size */
382 32, /* bitsize */
383 false, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_dont, /* complain_on_overflow */
386 bfd_elf_generic_reloc, /* special_function */
387 "R_RISCV_HI20", /* name */
388 false, /* partial_inplace */
389 0, /* src_mask */
390 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
391 false), /* pcrel_offset */
392
393 /* High 12 bits of 32-bit load or add. */
394 HOWTO (R_RISCV_LO12_I, /* type */
395 0, /* rightshift */
396 2, /* size */
397 32, /* bitsize */
398 false, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_dont, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_RISCV_LO12_I", /* name */
403 false, /* partial_inplace */
404 0, /* src_mask */
405 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
406 false), /* pcrel_offset */
407
408 /* High 12 bits of 32-bit store. */
409 HOWTO (R_RISCV_LO12_S, /* type */
410 0, /* rightshift */
411 2, /* size */
412 32, /* bitsize */
413 false, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_RISCV_LO12_S", /* name */
418 false, /* partial_inplace */
419 0, /* src_mask */
420 ENCODE_STYPE_IMM (-1U), /* dst_mask */
421 false), /* pcrel_offset */
422
423 /* High 20 bits of TLS LE thread pointer offset. */
424 HOWTO (R_RISCV_TPREL_HI20, /* type */
425 0, /* rightshift */
426 2, /* size */
427 32, /* bitsize */
428 false, /* pc_relative */
429 0, /* bitpos */
430 complain_overflow_signed, /* complain_on_overflow */
431 bfd_elf_generic_reloc, /* special_function */
432 "R_RISCV_TPREL_HI20", /* name */
433 true, /* partial_inplace */
434 0, /* src_mask */
435 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
436 false), /* pcrel_offset */
437
438 /* Low 12 bits of TLS LE thread pointer offset for loads and adds. */
439 HOWTO (R_RISCV_TPREL_LO12_I, /* type */
440 0, /* rightshift */
441 2, /* size */
442 32, /* bitsize */
443 false, /* pc_relative */
444 0, /* bitpos */
445 complain_overflow_signed, /* complain_on_overflow */
446 bfd_elf_generic_reloc, /* special_function */
447 "R_RISCV_TPREL_LO12_I", /* name */
448 false, /* partial_inplace */
449 0, /* src_mask */
450 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
451 false), /* pcrel_offset */
452
453 /* Low 12 bits of TLS LE thread pointer offset for stores. */
454 HOWTO (R_RISCV_TPREL_LO12_S, /* type */
455 0, /* rightshift */
456 2, /* size */
457 32, /* bitsize */
458 false, /* pc_relative */
459 0, /* bitpos */
460 complain_overflow_signed, /* complain_on_overflow */
461 bfd_elf_generic_reloc, /* special_function */
462 "R_RISCV_TPREL_LO12_S", /* name */
463 false, /* partial_inplace */
464 0, /* src_mask */
465 ENCODE_STYPE_IMM (-1U), /* dst_mask */
466 false), /* pcrel_offset */
467
468 /* TLS LE thread pointer usage. May be relaxed. */
469 HOWTO (R_RISCV_TPREL_ADD, /* type */
470 0, /* rightshift */
471 3, /* size */
472 0, /* bitsize */
473 false, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_dont, /* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_RISCV_TPREL_ADD", /* name */
478 false, /* partial_inplace */
479 0, /* src_mask */
480 0, /* dst_mask */
481 false), /* pcrel_offset */
482
483 /* 8-bit in-place addition, for local label subtraction. */
484 HOWTO (R_RISCV_ADD8, /* type */
485 0, /* rightshift */
486 0, /* size */
487 8, /* bitsize */
488 false, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_dont, /* complain_on_overflow */
491 riscv_elf_add_sub_reloc, /* special_function */
492 "R_RISCV_ADD8", /* name */
493 false, /* partial_inplace */
494 0, /* src_mask */
495 0xff, /* dst_mask */
496 false), /* pcrel_offset */
497
498 /* 16-bit in-place addition, for local label subtraction. */
499 HOWTO (R_RISCV_ADD16, /* type */
500 0, /* rightshift */
501 1, /* size */
502 16, /* bitsize */
503 false, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_dont, /* complain_on_overflow */
506 riscv_elf_add_sub_reloc, /* special_function */
507 "R_RISCV_ADD16", /* name */
508 false, /* partial_inplace */
509 0, /* src_mask */
510 0xffff, /* dst_mask */
511 false), /* pcrel_offset */
512
513 /* 32-bit in-place addition, for local label subtraction. */
514 HOWTO (R_RISCV_ADD32, /* type */
515 0, /* rightshift */
516 2, /* size */
517 32, /* bitsize */
518 false, /* pc_relative */
519 0, /* bitpos */
520 complain_overflow_dont, /* complain_on_overflow */
521 riscv_elf_add_sub_reloc, /* special_function */
522 "R_RISCV_ADD32", /* name */
523 false, /* partial_inplace */
524 0, /* src_mask */
525 0xffffffff, /* dst_mask */
526 false), /* pcrel_offset */
527
528 /* 64-bit in-place addition, for local label subtraction. */
529 HOWTO (R_RISCV_ADD64, /* type */
530 0, /* rightshift */
531 4, /* size */
532 64, /* bitsize */
533 false, /* pc_relative */
534 0, /* bitpos */
535 complain_overflow_dont, /* complain_on_overflow */
536 riscv_elf_add_sub_reloc, /* special_function */
537 "R_RISCV_ADD64", /* name */
538 false, /* partial_inplace */
539 0, /* src_mask */
540 MINUS_ONE, /* dst_mask */
541 false), /* pcrel_offset */
542
543 /* 8-bit in-place addition, for local label subtraction. */
544 HOWTO (R_RISCV_SUB8, /* type */
545 0, /* rightshift */
546 0, /* size */
547 8, /* bitsize */
548 false, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_dont, /* complain_on_overflow */
551 riscv_elf_add_sub_reloc, /* special_function */
552 "R_RISCV_SUB8", /* name */
553 false, /* partial_inplace */
554 0, /* src_mask */
555 0xff, /* dst_mask */
556 false), /* pcrel_offset */
557
558 /* 16-bit in-place addition, for local label subtraction. */
559 HOWTO (R_RISCV_SUB16, /* type */
560 0, /* rightshift */
561 1, /* size */
562 16, /* bitsize */
563 false, /* pc_relative */
564 0, /* bitpos */
565 complain_overflow_dont, /* complain_on_overflow */
566 riscv_elf_add_sub_reloc, /* special_function */
567 "R_RISCV_SUB16", /* name */
568 false, /* partial_inplace */
569 0, /* src_mask */
570 0xffff, /* dst_mask */
571 false), /* pcrel_offset */
572
573 /* 32-bit in-place addition, for local label subtraction. */
574 HOWTO (R_RISCV_SUB32, /* type */
575 0, /* rightshift */
576 2, /* size */
577 32, /* bitsize */
578 false, /* pc_relative */
579 0, /* bitpos */
580 complain_overflow_dont, /* complain_on_overflow */
581 riscv_elf_add_sub_reloc, /* special_function */
582 "R_RISCV_SUB32", /* name */
583 false, /* partial_inplace */
584 0, /* src_mask */
585 0xffffffff, /* dst_mask */
586 false), /* pcrel_offset */
587
588 /* 64-bit in-place addition, for local label subtraction. */
589 HOWTO (R_RISCV_SUB64, /* type */
590 0, /* rightshift */
591 4, /* size */
592 64, /* bitsize */
593 false, /* pc_relative */
594 0, /* bitpos */
595 complain_overflow_dont, /* complain_on_overflow */
596 riscv_elf_add_sub_reloc, /* special_function */
597 "R_RISCV_SUB64", /* name */
598 false, /* partial_inplace */
599 0, /* src_mask */
600 MINUS_ONE, /* dst_mask */
601 false), /* pcrel_offset */
602
603 /* GNU extension to record C++ vtable hierarchy */
604 HOWTO (R_RISCV_GNU_VTINHERIT, /* type */
605 0, /* rightshift */
606 4, /* size */
607 0, /* bitsize */
608 false, /* pc_relative */
609 0, /* bitpos */
610 complain_overflow_dont, /* complain_on_overflow */
611 NULL, /* special_function */
612 "R_RISCV_GNU_VTINHERIT", /* name */
613 false, /* partial_inplace */
614 0, /* src_mask */
615 0, /* dst_mask */
616 false), /* pcrel_offset */
617
618 /* GNU extension to record C++ vtable member usage */
619 HOWTO (R_RISCV_GNU_VTENTRY, /* type */
620 0, /* rightshift */
621 4, /* size */
622 0, /* bitsize */
623 false, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
627 "R_RISCV_GNU_VTENTRY", /* name */
628 false, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 false), /* pcrel_offset */
632
633 /* Indicates an alignment statement. The addend field encodes how many
634 bytes of NOPs follow the statement. The desired alignment is the
635 addend rounded up to the next power of two. */
636 HOWTO (R_RISCV_ALIGN, /* type */
637 0, /* rightshift */
638 3, /* size */
639 0, /* bitsize */
640 false, /* pc_relative */
641 0, /* bitpos */
642 complain_overflow_dont, /* complain_on_overflow */
643 bfd_elf_generic_reloc, /* special_function */
644 "R_RISCV_ALIGN", /* name */
645 false, /* partial_inplace */
646 0, /* src_mask */
647 0, /* dst_mask */
648 false), /* pcrel_offset */
649
650 /* 8-bit PC-relative branch offset. */
651 HOWTO (R_RISCV_RVC_BRANCH, /* type */
652 0, /* rightshift */
653 1, /* size */
654 16, /* bitsize */
655 true, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_signed, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_RISCV_RVC_BRANCH", /* name */
660 false, /* partial_inplace */
661 0, /* src_mask */
662 ENCODE_CBTYPE_IMM (-1U), /* dst_mask */
663 true), /* pcrel_offset */
664
665 /* 11-bit PC-relative jump offset. */
666 HOWTO (R_RISCV_RVC_JUMP, /* type */
667 0, /* rightshift */
668 1, /* size */
669 16, /* bitsize */
670 true, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_dont, /* complain_on_overflow */
673 bfd_elf_generic_reloc, /* special_function */
674 "R_RISCV_RVC_JUMP", /* name */
675 false, /* partial_inplace */
676 0, /* src_mask */
677 ENCODE_CJTYPE_IMM (-1U), /* dst_mask */
678 true), /* pcrel_offset */
679
680 /* High 6 bits of 18-bit absolute address. */
681 HOWTO (R_RISCV_RVC_LUI, /* type */
682 0, /* rightshift */
683 1, /* size */
684 16, /* bitsize */
685 false, /* pc_relative */
686 0, /* bitpos */
687 complain_overflow_dont, /* complain_on_overflow */
688 bfd_elf_generic_reloc, /* special_function */
689 "R_RISCV_RVC_LUI", /* name */
690 false, /* partial_inplace */
691 0, /* src_mask */
692 ENCODE_CITYPE_IMM (-1U), /* dst_mask */
693 false), /* pcrel_offset */
694
695 /* GP-relative load. */
696 HOWTO (R_RISCV_GPREL_I, /* type */
697 0, /* rightshift */
698 2, /* size */
699 32, /* bitsize */
700 false, /* pc_relative */
701 0, /* bitpos */
702 complain_overflow_dont, /* complain_on_overflow */
703 bfd_elf_generic_reloc, /* special_function */
704 "R_RISCV_GPREL_I", /* name */
705 false, /* partial_inplace */
706 0, /* src_mask */
707 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
708 false), /* pcrel_offset */
709
710 /* GP-relative store. */
711 HOWTO (R_RISCV_GPREL_S, /* type */
712 0, /* rightshift */
713 2, /* size */
714 32, /* bitsize */
715 false, /* pc_relative */
716 0, /* bitpos */
717 complain_overflow_dont, /* complain_on_overflow */
718 bfd_elf_generic_reloc, /* special_function */
719 "R_RISCV_GPREL_S", /* name */
720 false, /* partial_inplace */
721 0, /* src_mask */
722 ENCODE_STYPE_IMM (-1U), /* dst_mask */
723 false), /* pcrel_offset */
724
725 /* TP-relative TLS LE load. */
726 HOWTO (R_RISCV_TPREL_I, /* type */
727 0, /* rightshift */
728 2, /* size */
729 32, /* bitsize */
730 false, /* pc_relative */
731 0, /* bitpos */
732 complain_overflow_signed, /* complain_on_overflow */
733 bfd_elf_generic_reloc, /* special_function */
734 "R_RISCV_TPREL_I", /* name */
735 false, /* partial_inplace */
736 0, /* src_mask */
737 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
738 false), /* pcrel_offset */
739
740 /* TP-relative TLS LE store. */
741 HOWTO (R_RISCV_TPREL_S, /* type */
742 0, /* rightshift */
743 2, /* size */
744 32, /* bitsize */
745 false, /* pc_relative */
746 0, /* bitpos */
747 complain_overflow_signed, /* complain_on_overflow */
748 bfd_elf_generic_reloc, /* special_function */
749 "R_RISCV_TPREL_S", /* name */
750 false, /* partial_inplace */
751 0, /* src_mask */
752 ENCODE_STYPE_IMM (-1U), /* dst_mask */
753 false), /* pcrel_offset */
754
755 /* The paired relocation may be relaxed. */
756 HOWTO (R_RISCV_RELAX, /* type */
757 0, /* rightshift */
758 3, /* size */
759 0, /* bitsize */
760 false, /* pc_relative */
761 0, /* bitpos */
762 complain_overflow_dont, /* complain_on_overflow */
763 bfd_elf_generic_reloc, /* special_function */
764 "R_RISCV_RELAX", /* name */
765 false, /* partial_inplace */
766 0, /* src_mask */
767 0, /* dst_mask */
768 false), /* pcrel_offset */
769
770 /* 6-bit in-place addition, for local label subtraction. */
771 HOWTO (R_RISCV_SUB6, /* type */
772 0, /* rightshift */
773 0, /* size */
774 8, /* bitsize */
775 false, /* pc_relative */
776 0, /* bitpos */
777 complain_overflow_dont, /* complain_on_overflow */
778 riscv_elf_add_sub_reloc, /* special_function */
779 "R_RISCV_SUB6", /* name */
780 false, /* partial_inplace */
781 0, /* src_mask */
782 0x3f, /* dst_mask */
783 false), /* pcrel_offset */
784
785 /* 6-bit in-place setting, for local label subtraction. */
786 HOWTO (R_RISCV_SET6, /* type */
787 0, /* rightshift */
788 0, /* size */
789 8, /* bitsize */
790 false, /* pc_relative */
791 0, /* bitpos */
792 complain_overflow_dont, /* complain_on_overflow */
793 bfd_elf_generic_reloc, /* special_function */
794 "R_RISCV_SET6", /* name */
795 false, /* partial_inplace */
796 0, /* src_mask */
797 0x3f, /* dst_mask */
798 false), /* pcrel_offset */
799
800 /* 8-bit in-place setting, for local label subtraction. */
801 HOWTO (R_RISCV_SET8, /* type */
802 0, /* rightshift */
803 0, /* size */
804 8, /* bitsize */
805 false, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 bfd_elf_generic_reloc, /* special_function */
809 "R_RISCV_SET8", /* name */
810 false, /* partial_inplace */
811 0, /* src_mask */
812 0xff, /* dst_mask */
813 false), /* pcrel_offset */
814
815 /* 16-bit in-place setting, for local label subtraction. */
816 HOWTO (R_RISCV_SET16, /* type */
817 0, /* rightshift */
818 1, /* size */
819 16, /* bitsize */
820 false, /* pc_relative */
821 0, /* bitpos */
822 complain_overflow_dont, /* complain_on_overflow */
823 bfd_elf_generic_reloc, /* special_function */
824 "R_RISCV_SET16", /* name */
825 false, /* partial_inplace */
826 0, /* src_mask */
827 0xffff, /* dst_mask */
828 false), /* pcrel_offset */
829
830 /* 32-bit in-place setting, for local label subtraction. */
831 HOWTO (R_RISCV_SET32, /* type */
832 0, /* rightshift */
833 2, /* size */
834 32, /* bitsize */
835 false, /* pc_relative */
836 0, /* bitpos */
837 complain_overflow_dont, /* complain_on_overflow */
838 bfd_elf_generic_reloc, /* special_function */
839 "R_RISCV_SET32", /* name */
840 false, /* partial_inplace */
841 0, /* src_mask */
842 0xffffffff, /* dst_mask */
843 false), /* pcrel_offset */
844
845 /* 32-bit PC relative. */
846 HOWTO (R_RISCV_32_PCREL, /* type */
847 0, /* rightshift */
848 2, /* size */
849 32, /* bitsize */
850 true, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_dont, /* complain_on_overflow */
853 bfd_elf_generic_reloc, /* special_function */
854 "R_RISCV_32_PCREL", /* name */
855 false, /* partial_inplace */
856 0, /* src_mask */
857 0xffffffff, /* dst_mask */
858 false), /* pcrel_offset */
859
860 /* Relocation against a local ifunc symbol in a shared object. */
861 HOWTO (R_RISCV_IRELATIVE, /* type */
862 0, /* rightshift */
863 2, /* size */
864 32, /* bitsize */
865 false, /* pc_relative */
866 0, /* bitpos */
867 complain_overflow_dont, /* complain_on_overflow */
868 bfd_elf_generic_reloc, /* special_function */
869 "R_RISCV_IRELATIVE", /* name */
870 false, /* partial_inplace */
871 0, /* src_mask */
872 0xffffffff, /* dst_mask */
873 false), /* pcrel_offset */
874 };
875
876 /* A mapping from BFD reloc types to RISC-V ELF reloc types. */
877 struct elf_reloc_map
878 {
879 bfd_reloc_code_real_type bfd_val;
880 enum elf_riscv_reloc_type elf_val;
881 };
882
883 static const struct elf_reloc_map riscv_reloc_map[] =
884 {
885 { BFD_RELOC_NONE, R_RISCV_NONE },
886 { BFD_RELOC_32, R_RISCV_32 },
887 { BFD_RELOC_64, R_RISCV_64 },
888 { BFD_RELOC_RISCV_ADD8, R_RISCV_ADD8 },
889 { BFD_RELOC_RISCV_ADD16, R_RISCV_ADD16 },
890 { BFD_RELOC_RISCV_ADD32, R_RISCV_ADD32 },
891 { BFD_RELOC_RISCV_ADD64, R_RISCV_ADD64 },
892 { BFD_RELOC_RISCV_SUB8, R_RISCV_SUB8 },
893 { BFD_RELOC_RISCV_SUB16, R_RISCV_SUB16 },
894 { BFD_RELOC_RISCV_SUB32, R_RISCV_SUB32 },
895 { BFD_RELOC_RISCV_SUB64, R_RISCV_SUB64 },
896 { BFD_RELOC_CTOR, R_RISCV_64 },
897 { BFD_RELOC_12_PCREL, R_RISCV_BRANCH },
898 { BFD_RELOC_RISCV_HI20, R_RISCV_HI20 },
899 { BFD_RELOC_RISCV_LO12_I, R_RISCV_LO12_I },
900 { BFD_RELOC_RISCV_LO12_S, R_RISCV_LO12_S },
901 { BFD_RELOC_RISCV_PCREL_LO12_I, R_RISCV_PCREL_LO12_I },
902 { BFD_RELOC_RISCV_PCREL_LO12_S, R_RISCV_PCREL_LO12_S },
903 { BFD_RELOC_RISCV_CALL, R_RISCV_CALL },
904 { BFD_RELOC_RISCV_CALL_PLT, R_RISCV_CALL_PLT },
905 { BFD_RELOC_RISCV_PCREL_HI20, R_RISCV_PCREL_HI20 },
906 { BFD_RELOC_RISCV_JMP, R_RISCV_JAL },
907 { BFD_RELOC_RISCV_GOT_HI20, R_RISCV_GOT_HI20 },
908 { BFD_RELOC_RISCV_TLS_DTPMOD32, R_RISCV_TLS_DTPMOD32 },
909 { BFD_RELOC_RISCV_TLS_DTPREL32, R_RISCV_TLS_DTPREL32 },
910 { BFD_RELOC_RISCV_TLS_DTPMOD64, R_RISCV_TLS_DTPMOD64 },
911 { BFD_RELOC_RISCV_TLS_DTPREL64, R_RISCV_TLS_DTPREL64 },
912 { BFD_RELOC_RISCV_TLS_TPREL32, R_RISCV_TLS_TPREL32 },
913 { BFD_RELOC_RISCV_TLS_TPREL64, R_RISCV_TLS_TPREL64 },
914 { BFD_RELOC_RISCV_TPREL_HI20, R_RISCV_TPREL_HI20 },
915 { BFD_RELOC_RISCV_TPREL_ADD, R_RISCV_TPREL_ADD },
916 { BFD_RELOC_RISCV_TPREL_LO12_S, R_RISCV_TPREL_LO12_S },
917 { BFD_RELOC_RISCV_TPREL_LO12_I, R_RISCV_TPREL_LO12_I },
918 { BFD_RELOC_RISCV_TLS_GOT_HI20, R_RISCV_TLS_GOT_HI20 },
919 { BFD_RELOC_RISCV_TLS_GD_HI20, R_RISCV_TLS_GD_HI20 },
920 { BFD_RELOC_RISCV_ALIGN, R_RISCV_ALIGN },
921 { BFD_RELOC_RISCV_RVC_BRANCH, R_RISCV_RVC_BRANCH },
922 { BFD_RELOC_RISCV_RVC_JUMP, R_RISCV_RVC_JUMP },
923 { BFD_RELOC_RISCV_RVC_LUI, R_RISCV_RVC_LUI },
924 { BFD_RELOC_RISCV_GPREL_I, R_RISCV_GPREL_I },
925 { BFD_RELOC_RISCV_GPREL_S, R_RISCV_GPREL_S },
926 { BFD_RELOC_RISCV_TPREL_I, R_RISCV_TPREL_I },
927 { BFD_RELOC_RISCV_TPREL_S, R_RISCV_TPREL_S },
928 { BFD_RELOC_RISCV_RELAX, R_RISCV_RELAX },
929 { BFD_RELOC_RISCV_SUB6, R_RISCV_SUB6 },
930 { BFD_RELOC_RISCV_SET6, R_RISCV_SET6 },
931 { BFD_RELOC_RISCV_SET8, R_RISCV_SET8 },
932 { BFD_RELOC_RISCV_SET16, R_RISCV_SET16 },
933 { BFD_RELOC_RISCV_SET32, R_RISCV_SET32 },
934 { BFD_RELOC_RISCV_32_PCREL, R_RISCV_32_PCREL },
935 };
936
937 /* Given a BFD reloc type, return a howto structure. */
938
939 reloc_howto_type *
940 riscv_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
941 bfd_reloc_code_real_type code)
942 {
943 unsigned int i;
944
945 for (i = 0; i < ARRAY_SIZE (riscv_reloc_map); i++)
946 if (riscv_reloc_map[i].bfd_val == code)
947 return &howto_table[(int) riscv_reloc_map[i].elf_val];
948
949 bfd_set_error (bfd_error_bad_value);
950 return NULL;
951 }
952
953 reloc_howto_type *
954 riscv_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
955 {
956 unsigned int i;
957
958 for (i = 0; i < ARRAY_SIZE (howto_table); i++)
959 if (howto_table[i].name && strcasecmp (howto_table[i].name, r_name) == 0)
960 return &howto_table[i];
961
962 return NULL;
963 }
964
965 reloc_howto_type *
966 riscv_elf_rtype_to_howto (bfd *abfd, unsigned int r_type)
967 {
968 if (r_type >= ARRAY_SIZE (howto_table))
969 {
970 (*_bfd_error_handler) (_("%pB: unsupported relocation type %#x"),
971 abfd, r_type);
972 bfd_set_error (bfd_error_bad_value);
973 return NULL;
974 }
975 return &howto_table[r_type];
976 }
977
978 /* Special_function of RISCV_ADD and RISCV_SUB relocations. */
979
980 static bfd_reloc_status_type
981 riscv_elf_add_sub_reloc (bfd *abfd,
982 arelent *reloc_entry,
983 asymbol *symbol,
984 void *data,
985 asection *input_section,
986 bfd *output_bfd,
987 char **error_message ATTRIBUTE_UNUSED)
988 {
989 reloc_howto_type *howto = reloc_entry->howto;
990 bfd_vma relocation;
991
992 if (output_bfd != NULL
993 && (symbol->flags & BSF_SECTION_SYM) == 0
994 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
995 {
996 reloc_entry->address += input_section->output_offset;
997 return bfd_reloc_ok;
998 }
999
1000 if (output_bfd != NULL)
1001 return bfd_reloc_continue;
1002
1003 relocation = symbol->value + symbol->section->output_section->vma
1004 + symbol->section->output_offset + reloc_entry->addend;
1005 bfd_vma old_value = bfd_get (howto->bitsize, abfd,
1006 data + reloc_entry->address);
1007
1008 switch (howto->type)
1009 {
1010 case R_RISCV_ADD8:
1011 case R_RISCV_ADD16:
1012 case R_RISCV_ADD32:
1013 case R_RISCV_ADD64:
1014 relocation = old_value + relocation;
1015 break;
1016 case R_RISCV_SUB6:
1017 case R_RISCV_SUB8:
1018 case R_RISCV_SUB16:
1019 case R_RISCV_SUB32:
1020 case R_RISCV_SUB64:
1021 relocation = old_value - relocation;
1022 break;
1023 }
1024 bfd_put (howto->bitsize, abfd, relocation, data + reloc_entry->address);
1025
1026 return bfd_reloc_ok;
1027 }
1028
1029 /* Lists of prefixed class extensions that binutils should know about.
1030 Whether or not a particular entry is in these lists will dictate if
1031 gas/ld will accept its presence in the architecture string.
1032
1033 Please add the extensions to the lists in lower case. However, keep
1034 these subsets in alphabetical order in these tables is recommended,
1035 although there is no impact on the current implementation. */
1036
1037 static const char * const riscv_std_z_ext_strtab[] =
1038 {
1039 "zba", "zbb", "zbc", "zicsr", "zifencei", "zihintpause", NULL
1040 };
1041
1042 static const char * const riscv_std_s_ext_strtab[] =
1043 {
1044 NULL
1045 };
1046
1047 static const char * const riscv_std_h_ext_strtab[] =
1048 {
1049 NULL
1050 };
1051
1052 static const char * const riscv_std_zxm_ext_strtab[] =
1053 {
1054 NULL
1055 };
1056
1057 /* ISA extension prefixed name class. Must define them in parsing order. */
1058 enum riscv_prefix_ext_class
1059 {
1060 RV_ISA_CLASS_Z = 1,
1061 RV_ISA_CLASS_S,
1062 RV_ISA_CLASS_H,
1063 RV_ISA_CLASS_ZXM,
1064 RV_ISA_CLASS_X,
1065 RV_ISA_CLASS_UNKNOWN
1066 };
1067
1068 /* Record the strings of the prefixed extensions, and their corresponding
1069 classes. The more letters of the prefix string, the more forward it must
1070 be defined. Otherwise, the riscv_get_prefix_class will map it to the
1071 wrong classes. */
1072 struct riscv_parse_prefix_config
1073 {
1074 /* Class of the extension. */
1075 enum riscv_prefix_ext_class class;
1076
1077 /* Prefix string for error printing and internal parser usage. */
1078 const char *prefix;
1079 };
1080 static const struct riscv_parse_prefix_config parse_config[] =
1081 {
1082 {RV_ISA_CLASS_ZXM, "zxm"},
1083 {RV_ISA_CLASS_Z, "z"},
1084 {RV_ISA_CLASS_S, "s"},
1085 {RV_ISA_CLASS_H, "h"},
1086 {RV_ISA_CLASS_X, "x"},
1087 {RV_ISA_CLASS_UNKNOWN, NULL}
1088 };
1089
1090 /* Get the prefixed name class for the extensions, the class also
1091 means the order of the prefixed extensions. */
1092
1093 static enum riscv_prefix_ext_class
1094 riscv_get_prefix_class (const char *arch)
1095 {
1096 int i = 0;
1097 while (parse_config[i].class != RV_ISA_CLASS_UNKNOWN)
1098 {
1099 if (strncmp (arch, parse_config[i].prefix,
1100 strlen (parse_config[i].prefix)) == 0)
1101 return parse_config[i].class;
1102 i++;
1103 }
1104 return RV_ISA_CLASS_UNKNOWN;
1105 }
1106
1107 /* Check KNOWN_EXTS to see if the EXT is supported. */
1108
1109 static bool
1110 riscv_known_prefixed_ext (const char *ext,
1111 const char *const *known_exts)
1112 {
1113 size_t i;
1114 for (i = 0; known_exts[i]; ++i)
1115 if (strcmp (ext, known_exts[i]) == 0)
1116 return true;
1117 return false;
1118 }
1119
1120 /* Check whether the prefixed extension is valid or not. Return
1121 true if valid, otehrwise return false. */
1122
1123 static bool
1124 riscv_valid_prefixed_ext (const char *ext)
1125 {
1126 enum riscv_prefix_ext_class class = riscv_get_prefix_class (ext);
1127 switch (class)
1128 {
1129 case RV_ISA_CLASS_Z:
1130 return riscv_known_prefixed_ext (ext, riscv_std_z_ext_strtab);
1131 case RV_ISA_CLASS_ZXM:
1132 return riscv_known_prefixed_ext (ext, riscv_std_zxm_ext_strtab);
1133 case RV_ISA_CLASS_S:
1134 return riscv_known_prefixed_ext (ext, riscv_std_s_ext_strtab);
1135 case RV_ISA_CLASS_H:
1136 return riscv_known_prefixed_ext (ext, riscv_std_h_ext_strtab);
1137 case RV_ISA_CLASS_X:
1138 /* Only the single x is invalid. */
1139 if (strcmp (ext, "x") != 0)
1140 return true;
1141 default:
1142 break;
1143 }
1144 return false;
1145 }
1146
1147 /* Array is used to compare the orders of standard extensions quickly. */
1148 static int riscv_ext_order[26] = {0};
1149
1150 /* Init the riscv_ext_order array. */
1151
1152 static void
1153 riscv_init_ext_order (void)
1154 {
1155 static bool inited = false;
1156 const char *std_base_exts = "eig";
1157 const char *std_remain_exts = riscv_supported_std_ext ();
1158 const char *ext;
1159 int order;
1160
1161 if (inited)
1162 return;
1163
1164 /* The orders of all standard extensions are positive. */
1165 order = 1;
1166
1167 /* Init the standard base extensions first. */
1168 for (ext = std_base_exts; *ext; ext++)
1169 riscv_ext_order[(*ext - 'a')] = order++;
1170
1171 /* Init the standard remaining extensions. */
1172 for (ext = std_remain_exts; *ext; ext++)
1173 riscv_ext_order[(*ext - 'a')] = order++;
1174
1175 /* Some of the prefixed keyword are not single letter, so we set
1176 their prefixed orders in the riscv_compare_subsets directly,
1177 not through the riscv_ext_order. */
1178
1179 inited = true;
1180 }
1181
1182 /* Similar to the strcmp. It returns an integer less than, equal to,
1183 or greater than zero if `subset2` is found, respectively, to be less
1184 than, to match, or be greater than `subset1`.
1185
1186 The order values,
1187 Zero: Preserved keywords.
1188 Positive number: Standard extensions.
1189 Negative number: Prefixed keywords. */
1190
1191 int
1192 riscv_compare_subsets (const char *subset1, const char *subset2)
1193 {
1194 int order1 = riscv_ext_order[(*subset1 - 'a')];
1195 int order2 = riscv_ext_order[(*subset2 - 'a')];
1196
1197 /* Compare the standard extension first. */
1198 if (order1 > 0 && order2 > 0)
1199 return order1 - order2;
1200
1201 /* Set the prefixed orders to negative numbers. */
1202 enum riscv_prefix_ext_class class1 = riscv_get_prefix_class (subset1);
1203 enum riscv_prefix_ext_class class2 = riscv_get_prefix_class (subset2);
1204
1205 if (class1 != RV_ISA_CLASS_UNKNOWN)
1206 order1 = - (int) class1;
1207 if (class2 != RV_ISA_CLASS_UNKNOWN)
1208 order2 = - (int) class2;
1209
1210 if (order1 == order2)
1211 {
1212 /* Compare the standard addition z extensions. */
1213 if (class1 == RV_ISA_CLASS_Z)
1214 {
1215 order1 = riscv_ext_order[(*++subset1 - 'a')];
1216 order2 = riscv_ext_order[(*++subset2 - 'a')];
1217 if (order1 != order2)
1218 return order1 - order2;
1219 }
1220 return strcasecmp (++subset1, ++subset2);
1221 }
1222
1223 return order2 - order1;
1224 }
1225
1226 /* Find subset in the list. Return TRUE and set `current` to the subset
1227 if it is found. Otherwise, return FALSE and set `current` to the place
1228 where we should insert the subset. However, return FALSE with the NULL
1229 `current` means we should insert the subset at the head of subset list,
1230 if needed. */
1231
1232 bool
1233 riscv_lookup_subset (const riscv_subset_list_t *subset_list,
1234 const char *subset,
1235 riscv_subset_t **current)
1236 {
1237 riscv_subset_t *s, *pre_s = NULL;
1238
1239 for (s = subset_list->head;
1240 s != NULL;
1241 pre_s = s, s = s->next)
1242 {
1243 int cmp = riscv_compare_subsets (s->name, subset);
1244 if (cmp == 0)
1245 {
1246 *current = s;
1247 return true;
1248 }
1249 else if (cmp > 0)
1250 break;
1251 }
1252 *current = pre_s;
1253 return false;
1254 }
1255
1256 /* Add extension from ISA string to the last of the subset list. */
1257
1258 void
1259 riscv_add_subset (riscv_subset_list_t *subset_list,
1260 const char *subset,
1261 int major,
1262 int minor)
1263 {
1264 riscv_subset_t *s = xmalloc (sizeof *s);
1265
1266 if (subset_list->head == NULL)
1267 subset_list->head = s;
1268
1269 s->name = xstrdup (subset);
1270 s->major_version = major;
1271 s->minor_version = minor;
1272 s->next = NULL;
1273
1274 if (subset_list->tail != NULL)
1275 subset_list->tail->next = s;
1276 subset_list->tail = s;
1277 }
1278
1279 /* Add the implicit extension to the subset list. Search the
1280 list first, and then find the right place to add. */
1281
1282 static void
1283 riscv_add_implicit_subset (riscv_subset_list_t *subset_list,
1284 const char *subset,
1285 int major,
1286 int minor)
1287 {
1288 riscv_subset_t *current, *new;
1289
1290 if (riscv_lookup_subset (subset_list, subset, &current))
1291 return;
1292
1293 new = xmalloc (sizeof *new);
1294 new->name = xstrdup (subset);
1295 new->major_version = major;
1296 new->minor_version = minor;
1297 new->next = NULL;
1298
1299 if (current != NULL)
1300 {
1301 new->next = current->next;
1302 current->next = new;
1303 }
1304 else
1305 {
1306 new->next = subset_list->head;
1307 subset_list->head = new;
1308 }
1309 }
1310
1311 /* We have to add all extensions from ISA string first, and then start to
1312 add their implicit extensions. The extensions from ISA string must be
1313 set in order, so we can add them to the last of the subset list
1314 directly, without searching.
1315
1316 Find the default versions for the extension before adding them to
1317 the subset list, if their versions are RISCV_UNKNOWN_VERSION.
1318 Afterwards, report errors if we can not find their default versions. */
1319
1320 static void
1321 riscv_parse_add_subset (riscv_parse_subset_t *rps,
1322 const char *subset,
1323 int major,
1324 int minor,
1325 bool implicit)
1326 {
1327 int major_version = major;
1328 int minor_version = minor;
1329
1330 if ((major_version == RISCV_UNKNOWN_VERSION
1331 || minor_version == RISCV_UNKNOWN_VERSION)
1332 && rps->get_default_version != NULL)
1333 rps->get_default_version (subset, &major_version, &minor_version);
1334
1335 /* We don't care the versions of the implicit extensions. */
1336 if (!implicit
1337 && (major_version == RISCV_UNKNOWN_VERSION
1338 || minor_version == RISCV_UNKNOWN_VERSION))
1339 {
1340 if (subset[0] == 'x')
1341 rps->error_handler
1342 (_("x ISA extension `%s' must be set with the versions"),
1343 subset);
1344 else
1345 rps->error_handler
1346 (_("cannot find default versions of the ISA extension `%s'"),
1347 subset);
1348 return;
1349 }
1350
1351 if (!implicit)
1352 riscv_add_subset (rps->subset_list, subset,
1353 major_version, minor_version);
1354 else
1355 riscv_add_implicit_subset (rps->subset_list, subset,
1356 major_version, minor_version);
1357 }
1358
1359 /* Release subset list. */
1360
1361 void
1362 riscv_release_subset_list (riscv_subset_list_t *subset_list)
1363 {
1364 while (subset_list->head != NULL)
1365 {
1366 riscv_subset_t *next = subset_list->head->next;
1367 free ((void *)subset_list->head->name);
1368 free (subset_list->head);
1369 subset_list->head = next;
1370 }
1371
1372 subset_list->tail = NULL;
1373 }
1374
1375 /* Parsing extension version.
1376
1377 Return Value:
1378 Points to the end of version
1379
1380 Arguments:
1381 `rps`: Hooks and status for parsing extensions.
1382 `march`: Full ISA string.
1383 `p`: Curent parsing position.
1384 `major_version`: Parsed major version.
1385 `minor_version`: Parsed minor version.
1386 `std_ext_p`: True if parsing standard extension. */
1387
1388 static const char *
1389 riscv_parsing_subset_version (riscv_parse_subset_t *rps,
1390 const char *march,
1391 const char *p,
1392 int *major_version,
1393 int *minor_version,
1394 bool std_ext_p)
1395 {
1396 bool major_p = true;
1397 int version = 0;
1398 char np;
1399
1400 *major_version = 0;
1401 *minor_version = 0;
1402 for (; *p; ++p)
1403 {
1404 if (*p == 'p')
1405 {
1406 np = *(p + 1);
1407
1408 if (!ISDIGIT (np))
1409 {
1410 /* Might be beginning of `p` extension. */
1411 if (std_ext_p)
1412 {
1413 *major_version = version;
1414 *minor_version = 0;
1415 return p;
1416 }
1417 else
1418 {
1419 rps->error_handler
1420 (_("-march=%s: expect number after `%dp'"),
1421 march, version);
1422 return NULL;
1423 }
1424 }
1425
1426 *major_version = version;
1427 major_p = false;
1428 version = 0;
1429 }
1430 else if (ISDIGIT (*p))
1431 version = (version * 10) + (*p - '0');
1432 else
1433 break;
1434 }
1435
1436 if (major_p)
1437 *major_version = version;
1438 else
1439 *minor_version = version;
1440
1441 /* We can not find any version in string. */
1442 if (*major_version == 0 && *minor_version == 0)
1443 {
1444 *major_version = RISCV_UNKNOWN_VERSION;
1445 *minor_version = RISCV_UNKNOWN_VERSION;
1446 }
1447
1448 return p;
1449 }
1450
1451 /* Return string which contain all supported standard extensions in
1452 canonical order. */
1453
1454 const char *
1455 riscv_supported_std_ext (void)
1456 {
1457 return "mafdqlcbjtpvn";
1458 }
1459
1460 /* Parsing function for standard extensions.
1461
1462 Return Value:
1463 Points to the end of extensions.
1464
1465 Arguments:
1466 `rps`: Hooks and status for parsing extensions.
1467 `march`: Full ISA string.
1468 `p`: Curent parsing position. */
1469
1470 static const char *
1471 riscv_parse_std_ext (riscv_parse_subset_t *rps,
1472 const char *march,
1473 const char *p)
1474 {
1475 const char *all_std_exts = riscv_supported_std_ext ();
1476 const char *std_exts = all_std_exts;
1477 int major_version;
1478 int minor_version;
1479 char subset[2] = {0, 0};
1480
1481 /* First letter must start with i, e or g. */
1482 switch (*p)
1483 {
1484 case 'i':
1485 p = riscv_parsing_subset_version (rps, march, ++p,
1486 &major_version,
1487 &minor_version, true);
1488 riscv_parse_add_subset (rps, "i",
1489 major_version,
1490 minor_version, false);
1491 break;
1492
1493 case 'e':
1494 p = riscv_parsing_subset_version (rps, march, ++p,
1495 &major_version,
1496 &minor_version, true);
1497 riscv_parse_add_subset (rps, "e",
1498 major_version,
1499 minor_version, false);
1500 if (*rps->xlen > 32)
1501 {
1502 rps->error_handler
1503 (_("-march=%s: rv%de is not a valid base ISA"),
1504 march, *rps->xlen);
1505 return NULL;
1506 }
1507 break;
1508
1509 case 'g':
1510 p = riscv_parsing_subset_version (rps, march, ++p,
1511 &major_version,
1512 &minor_version, true);
1513 /* Expand g to imafd. */
1514 riscv_parse_add_subset (rps, "i",
1515 RISCV_UNKNOWN_VERSION,
1516 RISCV_UNKNOWN_VERSION, false);
1517 for ( ; *std_exts != 'q'; std_exts++)
1518 {
1519 subset[0] = *std_exts;
1520 riscv_parse_add_subset (rps, subset,
1521 RISCV_UNKNOWN_VERSION,
1522 RISCV_UNKNOWN_VERSION, false);
1523 }
1524 /* Add g as an implicit extension. */
1525 riscv_parse_add_subset (rps, "g",
1526 RISCV_UNKNOWN_VERSION,
1527 RISCV_UNKNOWN_VERSION, true);
1528 break;
1529
1530 default:
1531 rps->error_handler
1532 (_("-march=%s: first ISA extension must be `e', `i' or `g'"),
1533 march);
1534 return NULL;
1535 }
1536
1537 while (p != NULL && *p != '\0')
1538 {
1539 /* Stop when we parsed the known prefix class. */
1540 enum riscv_prefix_ext_class class = riscv_get_prefix_class (p);
1541 if (class != RV_ISA_CLASS_UNKNOWN)
1542 break;
1543
1544 if (*p == '_')
1545 {
1546 p++;
1547 continue;
1548 }
1549
1550 /* Checking canonical order. */
1551 char std_ext = *p;
1552 while (*std_exts && std_ext != *std_exts)
1553 std_exts++;
1554
1555 if (std_ext != *std_exts)
1556 {
1557 if (riscv_ext_order[(std_ext - 'a')] == 0)
1558 rps->error_handler
1559 (_("-march=%s: unknown standard and prefixed ISA "
1560 "extension `%s'"), march, p);
1561 else
1562 rps->error_handler
1563 (_("-march=%s: standard ISA extension `%c' is not "
1564 "in canonical order"), march, std_ext);
1565 return NULL;
1566 }
1567
1568 std_exts++;
1569 subset[0] = std_ext;
1570 p = riscv_parsing_subset_version (rps, march, ++p,
1571 &major_version,
1572 &minor_version, true);
1573 riscv_parse_add_subset (rps, subset,
1574 major_version,
1575 minor_version, false);
1576 }
1577
1578 return p;
1579 }
1580
1581 /* Parsing function for prefixed extensions.
1582
1583 Return Value:
1584 Points to the end of extension.
1585
1586 Arguments:
1587 `rps`: Hooks and status for parsing extensions.
1588 `march`: Full ISA string.
1589 `p`: Curent parsing position. */
1590
1591 static const char *
1592 riscv_parse_prefixed_ext (riscv_parse_subset_t *rps,
1593 const char *march,
1594 const char *p)
1595 {
1596 int major_version;
1597 int minor_version;
1598 const char *last_name;
1599 enum riscv_prefix_ext_class class;
1600
1601 while (*p)
1602 {
1603 if (*p == '_')
1604 {
1605 p++;
1606 continue;
1607 }
1608
1609 class = riscv_get_prefix_class (p);
1610 if (class == RV_ISA_CLASS_UNKNOWN)
1611 {
1612 rps->error_handler
1613 (_("-march=%s: unknown prefix class for the ISA extension `%s'"),
1614 march, p);
1615 return NULL;
1616 }
1617
1618 char *subset = xstrdup (p);
1619 char *q = subset;
1620 const char *end_of_version;
1621
1622 while (*++q != '\0' && *q != '_' && !ISDIGIT (*q))
1623 ;
1624
1625 end_of_version =
1626 riscv_parsing_subset_version (rps, march, q,
1627 &major_version,
1628 &minor_version, false);
1629 *q = '\0';
1630
1631 if (end_of_version == NULL)
1632 {
1633 free (subset);
1634 return NULL;
1635 }
1636
1637 /* Check if the prefix extension is known.
1638 For 'x', anything goes but it cannot simply be 'x'.
1639 For other prefixed extensions, it must be known from a list
1640 and cannot simply be the prefixed name. */
1641
1642 /* Check that the extension name is well-formed. */
1643 if (!riscv_valid_prefixed_ext (subset))
1644 {
1645 rps->error_handler
1646 (_("-march=%s: unknown prefixed ISA extension `%s'"),
1647 march, subset);
1648 free (subset);
1649 return NULL;
1650 }
1651
1652 /* Check that the extension isn't duplicate. */
1653 last_name = rps->subset_list->tail->name;
1654 if (!strcasecmp (last_name, subset))
1655 {
1656 rps->error_handler
1657 (_("-march=%s: duplicate prefixed ISA extension `%s'"),
1658 march, subset);
1659 free (subset);
1660 return NULL;
1661 }
1662
1663 /* Check that the extension is in expected order. */
1664 if (riscv_compare_subsets (last_name, subset) > 0)
1665 {
1666 rps->error_handler
1667 (_("-march=%s: prefixed ISA extension `%s' is not in expected "
1668 "order. It must come before `%s'"),
1669 march, subset, last_name);
1670 free (subset);
1671 return NULL;
1672 }
1673
1674 riscv_parse_add_subset (rps, subset,
1675 major_version,
1676 minor_version, false);
1677 p += end_of_version - subset;
1678 free (subset);
1679
1680 if (*p != '\0' && *p != '_')
1681 {
1682 rps->error_handler
1683 (_("-march=%s: prefixed ISA extension must separate with _"),
1684 march);
1685 return NULL;
1686 }
1687 }
1688
1689 return p;
1690 }
1691
1692 /* Add the implicit extensions. */
1693
1694 static void
1695 riscv_parse_add_implicit_subsets (riscv_parse_subset_t *rps)
1696 {
1697 riscv_subset_t *subset = NULL;
1698
1699 if (riscv_lookup_subset (rps->subset_list, "e", &subset))
1700 riscv_parse_add_subset (rps, "i",
1701 RISCV_UNKNOWN_VERSION,
1702 RISCV_UNKNOWN_VERSION, true);
1703
1704 /* Add the zicsr and zifencei only when the i's version less than 2.1. */
1705 if (riscv_lookup_subset (rps->subset_list, "i", &subset)
1706 && (subset->major_version < 2
1707 || (subset->major_version == 2
1708 && subset->minor_version < 1)))
1709 {
1710 riscv_parse_add_subset (rps, "zicsr",
1711 RISCV_UNKNOWN_VERSION,
1712 RISCV_UNKNOWN_VERSION, true);
1713 riscv_parse_add_subset (rps, "zifencei",
1714 RISCV_UNKNOWN_VERSION,
1715 RISCV_UNKNOWN_VERSION, true);
1716 }
1717
1718 if (riscv_lookup_subset (rps->subset_list, "q", &subset))
1719 {
1720 riscv_parse_add_subset (rps, "d",
1721 RISCV_UNKNOWN_VERSION,
1722 RISCV_UNKNOWN_VERSION, true);
1723 riscv_parse_add_subset (rps, "f",
1724 RISCV_UNKNOWN_VERSION,
1725 RISCV_UNKNOWN_VERSION, true);
1726 riscv_parse_add_subset (rps, "zicsr",
1727 RISCV_UNKNOWN_VERSION,
1728 RISCV_UNKNOWN_VERSION, true);
1729 }
1730 else if (riscv_lookup_subset (rps->subset_list, "d", &subset))
1731 {
1732 riscv_parse_add_subset (rps, "f",
1733 RISCV_UNKNOWN_VERSION,
1734 RISCV_UNKNOWN_VERSION, true);
1735 riscv_parse_add_subset (rps, "zicsr",
1736 RISCV_UNKNOWN_VERSION,
1737 RISCV_UNKNOWN_VERSION, true);
1738 }
1739 else if (riscv_lookup_subset (rps->subset_list, "f", &subset))
1740 riscv_parse_add_subset (rps, "zicsr",
1741 RISCV_UNKNOWN_VERSION,
1742 RISCV_UNKNOWN_VERSION, true);
1743
1744 if (riscv_lookup_subset (rps->subset_list, "g", &subset))
1745 {
1746 riscv_parse_add_subset (rps, "zicsr",
1747 RISCV_UNKNOWN_VERSION,
1748 RISCV_UNKNOWN_VERSION, true);
1749 riscv_parse_add_subset (rps, "zifencei",
1750 RISCV_UNKNOWN_VERSION,
1751 RISCV_UNKNOWN_VERSION, true);
1752 }
1753 }
1754
1755 /* Function for parsing ISA string.
1756
1757 Return Value:
1758 Return TRUE on success.
1759
1760 Arguments:
1761 `rps`: Hooks and status for parsing extensions.
1762 `arch`: Full ISA string. */
1763
1764 bool
1765 riscv_parse_subset (riscv_parse_subset_t *rps,
1766 const char *arch)
1767 {
1768 riscv_subset_t *subset = NULL;
1769 const char *p;
1770 bool no_conflict = true;
1771
1772 for (p = arch; *p != '\0'; p++)
1773 {
1774 if (ISUPPER (*p))
1775 {
1776 rps->error_handler
1777 (_("-march=%s: ISA string cannot contain uppercase letters"),
1778 arch);
1779 return false;
1780 }
1781 }
1782
1783 p = arch;
1784 if (startswith (p, "rv32"))
1785 {
1786 *rps->xlen = 32;
1787 p += 4;
1788 }
1789 else if (startswith (p, "rv64"))
1790 {
1791 *rps->xlen = 64;
1792 p += 4;
1793 }
1794 else
1795 {
1796 /* ISA string shouldn't be NULL or empty here. However,
1797 it might be empty only when we failed to merge the ISA
1798 string in the riscv_merge_attributes. We have already
1799 issued the correct error message in another side, so do
1800 not issue this error when the ISA string is empty. */
1801 if (strlen (arch))
1802 rps->error_handler (
1803 _("-march=%s: ISA string must begin with rv32 or rv64"),
1804 arch);
1805 return false;
1806 }
1807
1808 /* Init the riscv_ext_order array to compare the order of extensions
1809 quickly. */
1810 riscv_init_ext_order ();
1811
1812 /* Parsing standard extension. */
1813 p = riscv_parse_std_ext (rps, arch, p);
1814
1815 if (p == NULL)
1816 return false;
1817
1818 /* Parse the different classes of extensions in the specified order. */
1819 while (*p != '\0')
1820 {
1821 p = riscv_parse_prefixed_ext (rps, arch, p);
1822
1823 if (p == NULL)
1824 return false;
1825 }
1826
1827 /* Finally add implicit extensions according to the current
1828 extensions. */
1829 riscv_parse_add_implicit_subsets (rps);
1830
1831 /* Check the conflicts. */
1832 if (riscv_lookup_subset (rps->subset_list, "e", &subset)
1833 && riscv_lookup_subset (rps->subset_list, "f", &subset))
1834 {
1835 rps->error_handler
1836 (_("-march=%s: rv32e does not support the `f' extension"),
1837 arch);
1838 no_conflict = false;
1839 }
1840 if (riscv_lookup_subset (rps->subset_list, "q", &subset)
1841 && *rps->xlen < 64)
1842 {
1843 rps->error_handler
1844 (_("-march=%s: rv32 does not support the `q' extension"),
1845 arch);
1846 no_conflict = false;
1847 }
1848 return no_conflict;
1849 }
1850
1851 /* Return the number of digits for the input. */
1852
1853 size_t
1854 riscv_estimate_digit (unsigned num)
1855 {
1856 size_t digit = 0;
1857 if (num == 0)
1858 return 1;
1859
1860 for (digit = 0; num ; num /= 10)
1861 digit++;
1862
1863 return digit;
1864 }
1865
1866 /* Auxiliary function to estimate string length of subset list. */
1867
1868 static size_t
1869 riscv_estimate_arch_strlen1 (const riscv_subset_t *subset)
1870 {
1871 if (subset == NULL)
1872 return 6; /* For rv32/rv64/rv128 and string terminator. */
1873
1874 return riscv_estimate_arch_strlen1 (subset->next)
1875 + strlen (subset->name)
1876 + riscv_estimate_digit (subset->major_version)
1877 + 1 /* For version seperator 'p'. */
1878 + riscv_estimate_digit (subset->minor_version)
1879 + 1 /* For underscore. */;
1880 }
1881
1882 /* Estimate the string length of this subset list. */
1883
1884 static size_t
1885 riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list)
1886 {
1887 return riscv_estimate_arch_strlen1 (subset_list->head);
1888 }
1889
1890 /* Auxiliary function to convert subset info to string. */
1891
1892 static void
1893 riscv_arch_str1 (riscv_subset_t *subset,
1894 char *attr_str, char *buf, size_t bufsz)
1895 {
1896 const char *underline = "_";
1897 riscv_subset_t *subset_t = subset;
1898
1899 if (subset_t == NULL)
1900 return;
1901
1902 /* No underline between rvXX and i/e. */
1903 if ((strcasecmp (subset_t->name, "i") == 0)
1904 || (strcasecmp (subset_t->name, "e") == 0))
1905 underline = "";
1906
1907 snprintf (buf, bufsz, "%s%s%dp%d",
1908 underline,
1909 subset_t->name,
1910 subset_t->major_version,
1911 subset_t->minor_version);
1912
1913 strncat (attr_str, buf, bufsz);
1914
1915 /* Skip 'i' extension after 'e', or skip extensions which
1916 versions are unknown. */
1917 while (subset_t->next
1918 && ((strcmp (subset_t->name, "e") == 0
1919 && strcmp (subset_t->next->name, "i") == 0)
1920 || subset_t->next->major_version == RISCV_UNKNOWN_VERSION
1921 || subset_t->next->minor_version == RISCV_UNKNOWN_VERSION))
1922 subset_t = subset_t->next;
1923
1924 riscv_arch_str1 (subset_t->next, attr_str, buf, bufsz);
1925 }
1926
1927 /* Convert subset information into string with explicit versions. */
1928
1929 char *
1930 riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset)
1931 {
1932 size_t arch_str_len = riscv_estimate_arch_strlen (subset);
1933 char *attr_str = xmalloc (arch_str_len);
1934 char *buf = xmalloc (arch_str_len);
1935
1936 snprintf (attr_str, arch_str_len, "rv%u", xlen);
1937
1938 riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len);
1939 free (buf);
1940
1941 return attr_str;
1942 }
GDB Binutils - Deliverables
This page took 0.071892 seconds and 4 git commands to generate.