projects / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
Fix ld-arm bug in encoding of blx calls jumping from thumb to arm instructions
[binutils-gdb.git] / bfd / elfxx-riscv.c
1 /* RISC-V-specific support for ELF.
2 Copyright (C) 2011-2022 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
33 #define MINUS_ONE ((bfd_vma)0 - 1)
34
35 /* Special handler for ADD/SUB relocations that allows them to be filled out
36 both in the pre-linked and post-linked file. This is necessary to make
37 pre-linked debug info work, as due to linker relaxations we need to emit
38 relocations for the debug info. */
39 static bfd_reloc_status_type riscv_elf_add_sub_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41
42 /* The relocation table used for SHT_RELA sections. */
43
44 static reloc_howto_type howto_table[] =
45 {
46 /* No relocation. */
47 HOWTO (R_RISCV_NONE, /* type */
48 0, /* rightshift */
49 3, /* size */
50 0, /* bitsize */
51 false, /* pc_relative */
52 0, /* bitpos */
53 complain_overflow_dont, /* complain_on_overflow */
54 bfd_elf_generic_reloc, /* special_function */
55 "R_RISCV_NONE", /* name */
56 false, /* partial_inplace */
57 0, /* src_mask */
58 0, /* dst_mask */
59 false), /* pcrel_offset */
60
61 /* 32 bit relocation. */
62 HOWTO (R_RISCV_32, /* type */
63 0, /* rightshift */
64 2, /* size */
65 32, /* bitsize */
66 false, /* pc_relative */
67 0, /* bitpos */
68 complain_overflow_dont, /* complain_on_overflow */
69 bfd_elf_generic_reloc, /* special_function */
70 "R_RISCV_32", /* name */
71 false, /* partial_inplace */
72 0, /* src_mask */
73 0xffffffff, /* dst_mask */
74 false), /* pcrel_offset */
75
76 /* 64 bit relocation. */
77 HOWTO (R_RISCV_64, /* type */
78 0, /* rightshift */
79 4, /* size */
80 64, /* bitsize */
81 false, /* pc_relative */
82 0, /* bitpos */
83 complain_overflow_dont, /* complain_on_overflow */
84 bfd_elf_generic_reloc, /* special_function */
85 "R_RISCV_64", /* name */
86 false, /* partial_inplace */
87 0, /* src_mask */
88 MINUS_ONE, /* dst_mask */
89 false), /* pcrel_offset */
90
91 /* Relocation against a local symbol in a shared object. */
92 HOWTO (R_RISCV_RELATIVE, /* type */
93 0, /* rightshift */
94 2, /* size */
95 32, /* bitsize */
96 false, /* pc_relative */
97 0, /* bitpos */
98 complain_overflow_dont, /* complain_on_overflow */
99 bfd_elf_generic_reloc, /* special_function */
100 "R_RISCV_RELATIVE", /* name */
101 false, /* partial_inplace */
102 0, /* src_mask */
103 0xffffffff, /* dst_mask */
104 false), /* pcrel_offset */
105
106 HOWTO (R_RISCV_COPY, /* type */
107 0, /* rightshift */
108 0, /* this one is variable size */
109 0, /* bitsize */
110 false, /* pc_relative */
111 0, /* bitpos */
112 complain_overflow_bitfield, /* complain_on_overflow */
113 bfd_elf_generic_reloc, /* special_function */
114 "R_RISCV_COPY", /* name */
115 false, /* partial_inplace */
116 0, /* src_mask */
117 0, /* dst_mask */
118 false), /* pcrel_offset */
119
120 HOWTO (R_RISCV_JUMP_SLOT, /* type */
121 0, /* rightshift */
122 4, /* size */
123 64, /* bitsize */
124 false, /* pc_relative */
125 0, /* bitpos */
126 complain_overflow_bitfield, /* complain_on_overflow */
127 bfd_elf_generic_reloc, /* special_function */
128 "R_RISCV_JUMP_SLOT", /* name */
129 false, /* partial_inplace */
130 0, /* src_mask */
131 0, /* dst_mask */
132 false), /* pcrel_offset */
133
134 /* Dynamic TLS relocations. */
135 HOWTO (R_RISCV_TLS_DTPMOD32, /* type */
136 0, /* rightshift */
137 2, /* size */
138 32, /* bitsize */
139 false, /* pc_relative */
140 0, /* bitpos */
141 complain_overflow_dont, /* complain_on_overflow */
142 bfd_elf_generic_reloc, /* special_function */
143 "R_RISCV_TLS_DTPMOD32", /* name */
144 false, /* partial_inplace */
145 0, /* src_mask */
146 0xffffffff, /* dst_mask */
147 false), /* pcrel_offset */
148
149 HOWTO (R_RISCV_TLS_DTPMOD64, /* type */
150 0, /* rightshift */
151 4, /* size */
152 64, /* bitsize */
153 false, /* pc_relative */
154 0, /* bitpos */
155 complain_overflow_dont, /* complain_on_overflow */
156 bfd_elf_generic_reloc, /* special_function */
157 "R_RISCV_TLS_DTPMOD64", /* name */
158 false, /* partial_inplace */
159 0, /* src_mask */
160 MINUS_ONE, /* dst_mask */
161 false), /* pcrel_offset */
162
163 HOWTO (R_RISCV_TLS_DTPREL32, /* type */
164 0, /* rightshift */
165 2, /* size */
166 32, /* bitsize */
167 false, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_dont, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_RISCV_TLS_DTPREL32", /* name */
172 true, /* partial_inplace */
173 0, /* src_mask */
174 0xffffffff, /* dst_mask */
175 false), /* pcrel_offset */
176
177 HOWTO (R_RISCV_TLS_DTPREL64, /* type */
178 0, /* rightshift */
179 4, /* size */
180 64, /* bitsize */
181 false, /* pc_relative */
182 0, /* bitpos */
183 complain_overflow_dont, /* complain_on_overflow */
184 bfd_elf_generic_reloc, /* special_function */
185 "R_RISCV_TLS_DTPREL64", /* name */
186 true, /* partial_inplace */
187 0, /* src_mask */
188 MINUS_ONE, /* dst_mask */
189 false), /* pcrel_offset */
190
191 HOWTO (R_RISCV_TLS_TPREL32, /* type */
192 0, /* rightshift */
193 2, /* size */
194 32, /* bitsize */
195 false, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_dont, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_RISCV_TLS_TPREL32", /* name */
200 false, /* partial_inplace */
201 0, /* src_mask */
202 0xffffffff, /* dst_mask */
203 false), /* pcrel_offset */
204
205 HOWTO (R_RISCV_TLS_TPREL64, /* type */
206 0, /* rightshift */
207 4, /* size */
208 64, /* bitsize */
209 false, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_dont, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_RISCV_TLS_TPREL64", /* name */
214 false, /* partial_inplace */
215 0, /* src_mask */
216 MINUS_ONE, /* dst_mask */
217 false), /* pcrel_offset */
218
219 /* Reserved for future relocs that the dynamic linker must understand. */
220 EMPTY_HOWTO (12),
221 EMPTY_HOWTO (13),
222 EMPTY_HOWTO (14),
223 EMPTY_HOWTO (15),
224
225 /* 12-bit PC-relative branch offset. */
226 HOWTO (R_RISCV_BRANCH, /* type */
227 0, /* rightshift */
228 2, /* size */
229 32, /* bitsize */
230 true, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_signed, /* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_RISCV_BRANCH", /* name */
235 false, /* partial_inplace */
236 0, /* src_mask */
237 ENCODE_BTYPE_IMM (-1U), /* dst_mask */
238 true), /* pcrel_offset */
239
240 /* 20-bit PC-relative jump offset. */
241 HOWTO (R_RISCV_JAL, /* type */
242 0, /* rightshift */
243 2, /* size */
244 32, /* bitsize */
245 true, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_RISCV_JAL", /* name */
250 false, /* partial_inplace */
251 0, /* src_mask */
252 ENCODE_JTYPE_IMM (-1U), /* dst_mask */
253 true), /* pcrel_offset */
254
255 /* 32-bit PC-relative function call (AUIPC/JALR). */
256 HOWTO (R_RISCV_CALL, /* type */
257 0, /* rightshift */
258 4, /* size */
259 64, /* bitsize */
260 true, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_RISCV_CALL", /* name */
265 false, /* partial_inplace */
266 0, /* src_mask */
267 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
268 /* dst_mask */
269 true), /* pcrel_offset */
270
271 /* Like R_RISCV_CALL, but not locally binding. */
272 HOWTO (R_RISCV_CALL_PLT, /* type */
273 0, /* rightshift */
274 4, /* size */
275 64, /* bitsize */
276 true, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_dont, /* complain_on_overflow */
279 bfd_elf_generic_reloc, /* special_function */
280 "R_RISCV_CALL_PLT", /* name */
281 false, /* partial_inplace */
282 0, /* src_mask */
283 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
284 /* dst_mask */
285 true), /* pcrel_offset */
286
287 /* High 20 bits of 32-bit PC-relative GOT access. */
288 HOWTO (R_RISCV_GOT_HI20, /* type */
289 0, /* rightshift */
290 2, /* size */
291 32, /* bitsize */
292 true, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_dont, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_RISCV_GOT_HI20", /* name */
297 false, /* partial_inplace */
298 0, /* src_mask */
299 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
300 false), /* pcrel_offset */
301
302 /* High 20 bits of 32-bit PC-relative TLS IE GOT access. */
303 HOWTO (R_RISCV_TLS_GOT_HI20, /* type */
304 0, /* rightshift */
305 2, /* size */
306 32, /* bitsize */
307 true, /* pc_relative */
308 0, /* bitpos */
309 complain_overflow_dont, /* complain_on_overflow */
310 bfd_elf_generic_reloc, /* special_function */
311 "R_RISCV_TLS_GOT_HI20", /* name */
312 false, /* partial_inplace */
313 0, /* src_mask */
314 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
315 false), /* pcrel_offset */
316
317 /* High 20 bits of 32-bit PC-relative TLS GD GOT reference. */
318 HOWTO (R_RISCV_TLS_GD_HI20, /* type */
319 0, /* rightshift */
320 2, /* size */
321 32, /* bitsize */
322 true, /* pc_relative */
323 0, /* bitpos */
324 complain_overflow_dont, /* complain_on_overflow */
325 bfd_elf_generic_reloc, /* special_function */
326 "R_RISCV_TLS_GD_HI20", /* name */
327 false, /* partial_inplace */
328 0, /* src_mask */
329 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
330 false), /* pcrel_offset */
331
332 /* High 20 bits of 32-bit PC-relative reference. */
333 HOWTO (R_RISCV_PCREL_HI20, /* type */
334 0, /* rightshift */
335 2, /* size */
336 32, /* bitsize */
337 true, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_dont, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_RISCV_PCREL_HI20", /* name */
342 false, /* partial_inplace */
343 0, /* src_mask */
344 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
345 true), /* pcrel_offset */
346
347 /* Low 12 bits of a 32-bit PC-relative load or add. */
348 HOWTO (R_RISCV_PCREL_LO12_I, /* type */
349 0, /* rightshift */
350 2, /* size */
351 32, /* bitsize */
352 false, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_dont, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_RISCV_PCREL_LO12_I", /* name */
357 false, /* partial_inplace */
358 0, /* src_mask */
359 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
360 false), /* pcrel_offset */
361
362 /* Low 12 bits of a 32-bit PC-relative store. */
363 HOWTO (R_RISCV_PCREL_LO12_S, /* type */
364 0, /* rightshift */
365 2, /* size */
366 32, /* bitsize */
367 false, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_dont, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_RISCV_PCREL_LO12_S", /* name */
372 false, /* partial_inplace */
373 0, /* src_mask */
374 ENCODE_STYPE_IMM (-1U), /* dst_mask */
375 false), /* pcrel_offset */
376
377 /* High 20 bits of 32-bit absolute address. */
378 HOWTO (R_RISCV_HI20, /* type */
379 0, /* rightshift */
380 2, /* size */
381 32, /* bitsize */
382 false, /* pc_relative */
383 0, /* bitpos */
384 complain_overflow_dont, /* complain_on_overflow */
385 bfd_elf_generic_reloc, /* special_function */
386 "R_RISCV_HI20", /* name */
387 false, /* partial_inplace */
388 0, /* src_mask */
389 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
390 false), /* pcrel_offset */
391
392 /* High 12 bits of 32-bit load or add. */
393 HOWTO (R_RISCV_LO12_I, /* type */
394 0, /* rightshift */
395 2, /* size */
396 32, /* bitsize */
397 false, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_dont, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_RISCV_LO12_I", /* name */
402 false, /* partial_inplace */
403 0, /* src_mask */
404 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
405 false), /* pcrel_offset */
406
407 /* High 12 bits of 32-bit store. */
408 HOWTO (R_RISCV_LO12_S, /* type */
409 0, /* rightshift */
410 2, /* size */
411 32, /* bitsize */
412 false, /* pc_relative */
413 0, /* bitpos */
414 complain_overflow_dont, /* complain_on_overflow */
415 bfd_elf_generic_reloc, /* special_function */
416 "R_RISCV_LO12_S", /* name */
417 false, /* partial_inplace */
418 0, /* src_mask */
419 ENCODE_STYPE_IMM (-1U), /* dst_mask */
420 false), /* pcrel_offset */
421
422 /* High 20 bits of TLS LE thread pointer offset. */
423 HOWTO (R_RISCV_TPREL_HI20, /* type */
424 0, /* rightshift */
425 2, /* size */
426 32, /* bitsize */
427 false, /* pc_relative */
428 0, /* bitpos */
429 complain_overflow_signed, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 "R_RISCV_TPREL_HI20", /* name */
432 true, /* partial_inplace */
433 0, /* src_mask */
434 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
435 false), /* pcrel_offset */
436
437 /* Low 12 bits of TLS LE thread pointer offset for loads and adds. */
438 HOWTO (R_RISCV_TPREL_LO12_I, /* type */
439 0, /* rightshift */
440 2, /* size */
441 32, /* bitsize */
442 false, /* pc_relative */
443 0, /* bitpos */
444 complain_overflow_signed, /* complain_on_overflow */
445 bfd_elf_generic_reloc, /* special_function */
446 "R_RISCV_TPREL_LO12_I", /* name */
447 false, /* partial_inplace */
448 0, /* src_mask */
449 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
450 false), /* pcrel_offset */
451
452 /* Low 12 bits of TLS LE thread pointer offset for stores. */
453 HOWTO (R_RISCV_TPREL_LO12_S, /* type */
454 0, /* rightshift */
455 2, /* size */
456 32, /* bitsize */
457 false, /* pc_relative */
458 0, /* bitpos */
459 complain_overflow_signed, /* complain_on_overflow */
460 bfd_elf_generic_reloc, /* special_function */
461 "R_RISCV_TPREL_LO12_S", /* name */
462 false, /* partial_inplace */
463 0, /* src_mask */
464 ENCODE_STYPE_IMM (-1U), /* dst_mask */
465 false), /* pcrel_offset */
466
467 /* TLS LE thread pointer usage. May be relaxed. */
468 HOWTO (R_RISCV_TPREL_ADD, /* type */
469 0, /* rightshift */
470 3, /* size */
471 0, /* bitsize */
472 false, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_RISCV_TPREL_ADD", /* name */
477 false, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 false), /* pcrel_offset */
481
482 /* 8-bit in-place addition, for local label subtraction. */
483 HOWTO (R_RISCV_ADD8, /* type */
484 0, /* rightshift */
485 0, /* size */
486 8, /* bitsize */
487 false, /* pc_relative */
488 0, /* bitpos */
489 complain_overflow_dont, /* complain_on_overflow */
490 riscv_elf_add_sub_reloc, /* special_function */
491 "R_RISCV_ADD8", /* name */
492 false, /* partial_inplace */
493 0, /* src_mask */
494 0xff, /* dst_mask */
495 false), /* pcrel_offset */
496
497 /* 16-bit in-place addition, for local label subtraction. */
498 HOWTO (R_RISCV_ADD16, /* type */
499 0, /* rightshift */
500 1, /* size */
501 16, /* bitsize */
502 false, /* pc_relative */
503 0, /* bitpos */
504 complain_overflow_dont, /* complain_on_overflow */
505 riscv_elf_add_sub_reloc, /* special_function */
506 "R_RISCV_ADD16", /* name */
507 false, /* partial_inplace */
508 0, /* src_mask */
509 0xffff, /* dst_mask */
510 false), /* pcrel_offset */
511
512 /* 32-bit in-place addition, for local label subtraction. */
513 HOWTO (R_RISCV_ADD32, /* type */
514 0, /* rightshift */
515 2, /* size */
516 32, /* bitsize */
517 false, /* pc_relative */
518 0, /* bitpos */
519 complain_overflow_dont, /* complain_on_overflow */
520 riscv_elf_add_sub_reloc, /* special_function */
521 "R_RISCV_ADD32", /* name */
522 false, /* partial_inplace */
523 0, /* src_mask */
524 0xffffffff, /* dst_mask */
525 false), /* pcrel_offset */
526
527 /* 64-bit in-place addition, for local label subtraction. */
528 HOWTO (R_RISCV_ADD64, /* type */
529 0, /* rightshift */
530 4, /* size */
531 64, /* bitsize */
532 false, /* pc_relative */
533 0, /* bitpos */
534 complain_overflow_dont, /* complain_on_overflow */
535 riscv_elf_add_sub_reloc, /* special_function */
536 "R_RISCV_ADD64", /* name */
537 false, /* partial_inplace */
538 0, /* src_mask */
539 MINUS_ONE, /* dst_mask */
540 false), /* pcrel_offset */
541
542 /* 8-bit in-place addition, for local label subtraction. */
543 HOWTO (R_RISCV_SUB8, /* type */
544 0, /* rightshift */
545 0, /* size */
546 8, /* bitsize */
547 false, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_dont, /* complain_on_overflow */
550 riscv_elf_add_sub_reloc, /* special_function */
551 "R_RISCV_SUB8", /* name */
552 false, /* partial_inplace */
553 0, /* src_mask */
554 0xff, /* dst_mask */
555 false), /* pcrel_offset */
556
557 /* 16-bit in-place addition, for local label subtraction. */
558 HOWTO (R_RISCV_SUB16, /* type */
559 0, /* rightshift */
560 1, /* size */
561 16, /* bitsize */
562 false, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_dont, /* complain_on_overflow */
565 riscv_elf_add_sub_reloc, /* special_function */
566 "R_RISCV_SUB16", /* name */
567 false, /* partial_inplace */
568 0, /* src_mask */
569 0xffff, /* dst_mask */
570 false), /* pcrel_offset */
571
572 /* 32-bit in-place addition, for local label subtraction. */
573 HOWTO (R_RISCV_SUB32, /* type */
574 0, /* rightshift */
575 2, /* size */
576 32, /* bitsize */
577 false, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 riscv_elf_add_sub_reloc, /* special_function */
581 "R_RISCV_SUB32", /* name */
582 false, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 false), /* pcrel_offset */
586
587 /* 64-bit in-place addition, for local label subtraction. */
588 HOWTO (R_RISCV_SUB64, /* type */
589 0, /* rightshift */
590 4, /* size */
591 64, /* bitsize */
592 false, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_dont, /* complain_on_overflow */
595 riscv_elf_add_sub_reloc, /* special_function */
596 "R_RISCV_SUB64", /* name */
597 false, /* partial_inplace */
598 0, /* src_mask */
599 MINUS_ONE, /* dst_mask */
600 false), /* pcrel_offset */
601
602 /* GNU extension to record C++ vtable hierarchy */
603 HOWTO (R_RISCV_GNU_VTINHERIT, /* type */
604 0, /* rightshift */
605 4, /* size */
606 0, /* bitsize */
607 false, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 NULL, /* special_function */
611 "R_RISCV_GNU_VTINHERIT", /* name */
612 false, /* partial_inplace */
613 0, /* src_mask */
614 0, /* dst_mask */
615 false), /* pcrel_offset */
616
617 /* GNU extension to record C++ vtable member usage */
618 HOWTO (R_RISCV_GNU_VTENTRY, /* type */
619 0, /* rightshift */
620 4, /* size */
621 0, /* bitsize */
622 false, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_dont, /* complain_on_overflow */
625 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
626 "R_RISCV_GNU_VTENTRY", /* name */
627 false, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 false), /* pcrel_offset */
631
632 /* Indicates an alignment statement. The addend field encodes how many
633 bytes of NOPs follow the statement. The desired alignment is the
634 addend rounded up to the next power of two. */
635 HOWTO (R_RISCV_ALIGN, /* type */
636 0, /* rightshift */
637 3, /* size */
638 0, /* bitsize */
639 false, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_RISCV_ALIGN", /* name */
644 false, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 false), /* pcrel_offset */
648
649 /* 8-bit PC-relative branch offset. */
650 HOWTO (R_RISCV_RVC_BRANCH, /* type */
651 0, /* rightshift */
652 1, /* size */
653 16, /* bitsize */
654 true, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_signed, /* complain_on_overflow */
657 bfd_elf_generic_reloc, /* special_function */
658 "R_RISCV_RVC_BRANCH", /* name */
659 false, /* partial_inplace */
660 0, /* src_mask */
661 ENCODE_CBTYPE_IMM (-1U), /* dst_mask */
662 true), /* pcrel_offset */
663
664 /* 11-bit PC-relative jump offset. */
665 HOWTO (R_RISCV_RVC_JUMP, /* type */
666 0, /* rightshift */
667 1, /* size */
668 16, /* bitsize */
669 true, /* pc_relative */
670 0, /* bitpos */
671 complain_overflow_dont, /* complain_on_overflow */
672 bfd_elf_generic_reloc, /* special_function */
673 "R_RISCV_RVC_JUMP", /* name */
674 false, /* partial_inplace */
675 0, /* src_mask */
676 ENCODE_CJTYPE_IMM (-1U), /* dst_mask */
677 true), /* pcrel_offset */
678
679 /* High 6 bits of 18-bit absolute address. */
680 HOWTO (R_RISCV_RVC_LUI, /* type */
681 0, /* rightshift */
682 1, /* size */
683 16, /* bitsize */
684 false, /* pc_relative */
685 0, /* bitpos */
686 complain_overflow_dont, /* complain_on_overflow */
687 bfd_elf_generic_reloc, /* special_function */
688 "R_RISCV_RVC_LUI", /* name */
689 false, /* partial_inplace */
690 0, /* src_mask */
691 ENCODE_CITYPE_IMM (-1U), /* dst_mask */
692 false), /* pcrel_offset */
693
694 /* GP-relative load. */
695 HOWTO (R_RISCV_GPREL_I, /* type */
696 0, /* rightshift */
697 2, /* size */
698 32, /* bitsize */
699 false, /* pc_relative */
700 0, /* bitpos */
701 complain_overflow_dont, /* complain_on_overflow */
702 bfd_elf_generic_reloc, /* special_function */
703 "R_RISCV_GPREL_I", /* name */
704 false, /* partial_inplace */
705 0, /* src_mask */
706 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
707 false), /* pcrel_offset */
708
709 /* GP-relative store. */
710 HOWTO (R_RISCV_GPREL_S, /* type */
711 0, /* rightshift */
712 2, /* size */
713 32, /* bitsize */
714 false, /* pc_relative */
715 0, /* bitpos */
716 complain_overflow_dont, /* complain_on_overflow */
717 bfd_elf_generic_reloc, /* special_function */
718 "R_RISCV_GPREL_S", /* name */
719 false, /* partial_inplace */
720 0, /* src_mask */
721 ENCODE_STYPE_IMM (-1U), /* dst_mask */
722 false), /* pcrel_offset */
723
724 /* TP-relative TLS LE load. */
725 HOWTO (R_RISCV_TPREL_I, /* type */
726 0, /* rightshift */
727 2, /* size */
728 32, /* bitsize */
729 false, /* pc_relative */
730 0, /* bitpos */
731 complain_overflow_signed, /* complain_on_overflow */
732 bfd_elf_generic_reloc, /* special_function */
733 "R_RISCV_TPREL_I", /* name */
734 false, /* partial_inplace */
735 0, /* src_mask */
736 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
737 false), /* pcrel_offset */
738
739 /* TP-relative TLS LE store. */
740 HOWTO (R_RISCV_TPREL_S, /* type */
741 0, /* rightshift */
742 2, /* size */
743 32, /* bitsize */
744 false, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_signed, /* complain_on_overflow */
747 bfd_elf_generic_reloc, /* special_function */
748 "R_RISCV_TPREL_S", /* name */
749 false, /* partial_inplace */
750 0, /* src_mask */
751 ENCODE_STYPE_IMM (-1U), /* dst_mask */
752 false), /* pcrel_offset */
753
754 /* The paired relocation may be relaxed. */
755 HOWTO (R_RISCV_RELAX, /* type */
756 0, /* rightshift */
757 3, /* size */
758 0, /* bitsize */
759 false, /* pc_relative */
760 0, /* bitpos */
761 complain_overflow_dont, /* complain_on_overflow */
762 bfd_elf_generic_reloc, /* special_function */
763 "R_RISCV_RELAX", /* name */
764 false, /* partial_inplace */
765 0, /* src_mask */
766 0, /* dst_mask */
767 false), /* pcrel_offset */
768
769 /* 6-bit in-place addition, for local label subtraction. */
770 HOWTO (R_RISCV_SUB6, /* type */
771 0, /* rightshift */
772 0, /* size */
773 8, /* bitsize */
774 false, /* pc_relative */
775 0, /* bitpos */
776 complain_overflow_dont, /* complain_on_overflow */
777 riscv_elf_add_sub_reloc, /* special_function */
778 "R_RISCV_SUB6", /* name */
779 false, /* partial_inplace */
780 0, /* src_mask */
781 0x3f, /* dst_mask */
782 false), /* pcrel_offset */
783
784 /* 6-bit in-place setting, for local label subtraction. */
785 HOWTO (R_RISCV_SET6, /* type */
786 0, /* rightshift */
787 0, /* size */
788 8, /* bitsize */
789 false, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_RISCV_SET6", /* name */
794 false, /* partial_inplace */
795 0, /* src_mask */
796 0x3f, /* dst_mask */
797 false), /* pcrel_offset */
798
799 /* 8-bit in-place setting, for local label subtraction. */
800 HOWTO (R_RISCV_SET8, /* type */
801 0, /* rightshift */
802 0, /* size */
803 8, /* bitsize */
804 false, /* pc_relative */
805 0, /* bitpos */
806 complain_overflow_dont, /* complain_on_overflow */
807 bfd_elf_generic_reloc, /* special_function */
808 "R_RISCV_SET8", /* name */
809 false, /* partial_inplace */
810 0, /* src_mask */
811 0xff, /* dst_mask */
812 false), /* pcrel_offset */
813
814 /* 16-bit in-place setting, for local label subtraction. */
815 HOWTO (R_RISCV_SET16, /* type */
816 0, /* rightshift */
817 1, /* size */
818 16, /* bitsize */
819 false, /* pc_relative */
820 0, /* bitpos */
821 complain_overflow_dont, /* complain_on_overflow */
822 bfd_elf_generic_reloc, /* special_function */
823 "R_RISCV_SET16", /* name */
824 false, /* partial_inplace */
825 0, /* src_mask */
826 0xffff, /* dst_mask */
827 false), /* pcrel_offset */
828
829 /* 32-bit in-place setting, for local label subtraction. */
830 HOWTO (R_RISCV_SET32, /* type */
831 0, /* rightshift */
832 2, /* size */
833 32, /* bitsize */
834 false, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_dont, /* complain_on_overflow */
837 bfd_elf_generic_reloc, /* special_function */
838 "R_RISCV_SET32", /* name */
839 false, /* partial_inplace */
840 0, /* src_mask */
841 0xffffffff, /* dst_mask */
842 false), /* pcrel_offset */
843
844 /* 32-bit PC relative. */
845 HOWTO (R_RISCV_32_PCREL, /* type */
846 0, /* rightshift */
847 2, /* size */
848 32, /* bitsize */
849 true, /* pc_relative */
850 0, /* bitpos */
851 complain_overflow_dont, /* complain_on_overflow */
852 bfd_elf_generic_reloc, /* special_function */
853 "R_RISCV_32_PCREL", /* name */
854 false, /* partial_inplace */
855 0, /* src_mask */
856 0xffffffff, /* dst_mask */
857 false), /* pcrel_offset */
858
859 /* Relocation against a local ifunc symbol in a shared object. */
860 HOWTO (R_RISCV_IRELATIVE, /* type */
861 0, /* rightshift */
862 2, /* size */
863 32, /* bitsize */
864 false, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont, /* complain_on_overflow */
867 bfd_elf_generic_reloc, /* special_function */
868 "R_RISCV_IRELATIVE", /* name */
869 false, /* partial_inplace */
870 0, /* src_mask */
871 0xffffffff, /* dst_mask */
872 false), /* pcrel_offset */
873 };
874
875 /* A mapping from BFD reloc types to RISC-V ELF reloc types. */
876 struct elf_reloc_map
877 {
878 bfd_reloc_code_real_type bfd_val;
879 enum elf_riscv_reloc_type elf_val;
880 };
881
882 static const struct elf_reloc_map riscv_reloc_map[] =
883 {
884 { BFD_RELOC_NONE, R_RISCV_NONE },
885 { BFD_RELOC_32, R_RISCV_32 },
886 { BFD_RELOC_64, R_RISCV_64 },
887 { BFD_RELOC_RISCV_ADD8, R_RISCV_ADD8 },
888 { BFD_RELOC_RISCV_ADD16, R_RISCV_ADD16 },
889 { BFD_RELOC_RISCV_ADD32, R_RISCV_ADD32 },
890 { BFD_RELOC_RISCV_ADD64, R_RISCV_ADD64 },
891 { BFD_RELOC_RISCV_SUB8, R_RISCV_SUB8 },
892 { BFD_RELOC_RISCV_SUB16, R_RISCV_SUB16 },
893 { BFD_RELOC_RISCV_SUB32, R_RISCV_SUB32 },
894 { BFD_RELOC_RISCV_SUB64, R_RISCV_SUB64 },
895 { BFD_RELOC_CTOR, R_RISCV_64 },
896 { BFD_RELOC_12_PCREL, R_RISCV_BRANCH },
897 { BFD_RELOC_RISCV_HI20, R_RISCV_HI20 },
898 { BFD_RELOC_RISCV_LO12_I, R_RISCV_LO12_I },
899 { BFD_RELOC_RISCV_LO12_S, R_RISCV_LO12_S },
900 { BFD_RELOC_RISCV_PCREL_LO12_I, R_RISCV_PCREL_LO12_I },
901 { BFD_RELOC_RISCV_PCREL_LO12_S, R_RISCV_PCREL_LO12_S },
902 { BFD_RELOC_RISCV_CALL, R_RISCV_CALL },
903 { BFD_RELOC_RISCV_CALL_PLT, R_RISCV_CALL_PLT },
904 { BFD_RELOC_RISCV_PCREL_HI20, R_RISCV_PCREL_HI20 },
905 { BFD_RELOC_RISCV_JMP, R_RISCV_JAL },
906 { BFD_RELOC_RISCV_GOT_HI20, R_RISCV_GOT_HI20 },
907 { BFD_RELOC_RISCV_TLS_DTPMOD32, R_RISCV_TLS_DTPMOD32 },
908 { BFD_RELOC_RISCV_TLS_DTPREL32, R_RISCV_TLS_DTPREL32 },
909 { BFD_RELOC_RISCV_TLS_DTPMOD64, R_RISCV_TLS_DTPMOD64 },
910 { BFD_RELOC_RISCV_TLS_DTPREL64, R_RISCV_TLS_DTPREL64 },
911 { BFD_RELOC_RISCV_TLS_TPREL32, R_RISCV_TLS_TPREL32 },
912 { BFD_RELOC_RISCV_TLS_TPREL64, R_RISCV_TLS_TPREL64 },
913 { BFD_RELOC_RISCV_TPREL_HI20, R_RISCV_TPREL_HI20 },
914 { BFD_RELOC_RISCV_TPREL_ADD, R_RISCV_TPREL_ADD },
915 { BFD_RELOC_RISCV_TPREL_LO12_S, R_RISCV_TPREL_LO12_S },
916 { BFD_RELOC_RISCV_TPREL_LO12_I, R_RISCV_TPREL_LO12_I },
917 { BFD_RELOC_RISCV_TLS_GOT_HI20, R_RISCV_TLS_GOT_HI20 },
918 { BFD_RELOC_RISCV_TLS_GD_HI20, R_RISCV_TLS_GD_HI20 },
919 { BFD_RELOC_RISCV_ALIGN, R_RISCV_ALIGN },
920 { BFD_RELOC_RISCV_RVC_BRANCH, R_RISCV_RVC_BRANCH },
921 { BFD_RELOC_RISCV_RVC_JUMP, R_RISCV_RVC_JUMP },
922 { BFD_RELOC_RISCV_RVC_LUI, R_RISCV_RVC_LUI },
923 { BFD_RELOC_RISCV_GPREL_I, R_RISCV_GPREL_I },
924 { BFD_RELOC_RISCV_GPREL_S, R_RISCV_GPREL_S },
925 { BFD_RELOC_RISCV_TPREL_I, R_RISCV_TPREL_I },
926 { BFD_RELOC_RISCV_TPREL_S, R_RISCV_TPREL_S },
927 { BFD_RELOC_RISCV_RELAX, R_RISCV_RELAX },
928 { BFD_RELOC_RISCV_SUB6, R_RISCV_SUB6 },
929 { BFD_RELOC_RISCV_SET6, R_RISCV_SET6 },
930 { BFD_RELOC_RISCV_SET8, R_RISCV_SET8 },
931 { BFD_RELOC_RISCV_SET16, R_RISCV_SET16 },
932 { BFD_RELOC_RISCV_SET32, R_RISCV_SET32 },
933 { BFD_RELOC_RISCV_32_PCREL, R_RISCV_32_PCREL },
934 };
935
936 /* Given a BFD reloc type, return a howto structure. */
937
938 reloc_howto_type *
939 riscv_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
940 bfd_reloc_code_real_type code)
941 {
942 unsigned int i;
943
944 for (i = 0; i < ARRAY_SIZE (riscv_reloc_map); i++)
945 if (riscv_reloc_map[i].bfd_val == code)
946 return &howto_table[(int) riscv_reloc_map[i].elf_val];
947
948 bfd_set_error (bfd_error_bad_value);
949 return NULL;
950 }
951
952 reloc_howto_type *
953 riscv_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
954 {
955 unsigned int i;
956
957 for (i = 0; i < ARRAY_SIZE (howto_table); i++)
958 if (howto_table[i].name && strcasecmp (howto_table[i].name, r_name) == 0)
959 return &howto_table[i];
960
961 return NULL;
962 }
963
964 reloc_howto_type *
965 riscv_elf_rtype_to_howto (bfd *abfd, unsigned int r_type)
966 {
967 if (r_type >= ARRAY_SIZE (howto_table))
968 {
969 (*_bfd_error_handler) (_("%pB: unsupported relocation type %#x"),
970 abfd, r_type);
971 bfd_set_error (bfd_error_bad_value);
972 return NULL;
973 }
974 return &howto_table[r_type];
975 }
976
977 /* Special_function of RISCV_ADD and RISCV_SUB relocations. */
978
979 static bfd_reloc_status_type
980 riscv_elf_add_sub_reloc (bfd *abfd,
981 arelent *reloc_entry,
982 asymbol *symbol,
983 void *data,
984 asection *input_section,
985 bfd *output_bfd,
986 char **error_message ATTRIBUTE_UNUSED)
987 {
988 reloc_howto_type *howto = reloc_entry->howto;
989 bfd_vma relocation;
990
991 if (output_bfd != NULL
992 && (symbol->flags & BSF_SECTION_SYM) == 0
993 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
994 {
995 reloc_entry->address += input_section->output_offset;
996 return bfd_reloc_ok;
997 }
998
999 if (output_bfd != NULL)
1000 return bfd_reloc_continue;
1001
1002 relocation = symbol->value + symbol->section->output_section->vma
1003 + symbol->section->output_offset + reloc_entry->addend;
1004
1005 bfd_size_type octets = reloc_entry->address
1006 * bfd_octets_per_byte (abfd, input_section);
1007 if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd,
1008 input_section, octets))
1009 return bfd_reloc_outofrange;
1010
1011 bfd_vma old_value = bfd_get (howto->bitsize, abfd,
1012 data + reloc_entry->address);
1013
1014 switch (howto->type)
1015 {
1016 case R_RISCV_ADD8:
1017 case R_RISCV_ADD16:
1018 case R_RISCV_ADD32:
1019 case R_RISCV_ADD64:
1020 relocation = old_value + relocation;
1021 break;
1022 case R_RISCV_SUB6:
1023 case R_RISCV_SUB8:
1024 case R_RISCV_SUB16:
1025 case R_RISCV_SUB32:
1026 case R_RISCV_SUB64:
1027 relocation = old_value - relocation;
1028 break;
1029 }
1030 bfd_put (howto->bitsize, abfd, relocation, data + reloc_entry->address);
1031
1032 return bfd_reloc_ok;
1033 }
1034
1035 /* Always add the IMPLICIT for the SUBSET. */
1036
1037 static bool
1038 check_implicit_always (const char *implicit ATTRIBUTE_UNUSED,
1039 riscv_subset_t *subset ATTRIBUTE_UNUSED)
1040 {
1041 return true;
1042 }
1043
1044 /* Add the IMPLICIT only when the version of SUBSET less than 2.1. */
1045
1046 static bool
1047 check_implicit_for_i (const char *implicit ATTRIBUTE_UNUSED,
1048 riscv_subset_t *subset)
1049 {
1050 return (subset->major_version < 2
1051 || (subset->major_version == 2
1052 && subset->minor_version < 1));
1053 }
1054
1055 /* Record all implicit information for the subsets. */
1056 struct riscv_implicit_subset
1057 {
1058 const char *subset_name;
1059 const char *implicit_name;
1060 /* A function to determine if we need to add the implicit subset. */
1061 bool (*check_func) (const char *, riscv_subset_t *);
1062 };
1063 static struct riscv_implicit_subset riscv_implicit_subsets[] =
1064 {
1065 {"e", "i", check_implicit_always},
1066 {"i", "zicsr", check_implicit_for_i},
1067 {"i", "zifencei", check_implicit_for_i},
1068 {"g", "i", check_implicit_always},
1069 {"g", "m", check_implicit_always},
1070 {"g", "a", check_implicit_always},
1071 {"g", "f", check_implicit_always},
1072 {"g", "d", check_implicit_always},
1073 {"g", "zicsr", check_implicit_always},
1074 {"g", "zifencei", check_implicit_always},
1075 {"q", "d", check_implicit_always},
1076 {"v", "d", check_implicit_always},
1077 {"v", "zve64d", check_implicit_always},
1078 {"v", "zvl128b", check_implicit_always},
1079 {"zve64d", "d", check_implicit_always},
1080 {"zve64d", "zve64f", check_implicit_always},
1081 {"zve64f", "zve32f", check_implicit_always},
1082 {"zve64f", "zve64x", check_implicit_always},
1083 {"zve64f", "zvl64b", check_implicit_always},
1084 {"zve32f", "f", check_implicit_always},
1085 {"zve32f", "zvl32b", check_implicit_always},
1086 {"zve32f", "zve32x", check_implicit_always},
1087 {"zve64x", "zve32x", check_implicit_always},
1088 {"zve64x", "zvl64b", check_implicit_always},
1089 {"zve32x", "zvl32b", check_implicit_always},
1090 {"zvl65536b", "zvl32768b", check_implicit_always},
1091 {"zvl32768b", "zvl16384b", check_implicit_always},
1092 {"zvl16384b", "zvl8192b", check_implicit_always},
1093 {"zvl8192b", "zvl4096b", check_implicit_always},
1094 {"zvl4096b", "zvl2048b", check_implicit_always},
1095 {"zvl2048b", "zvl1024b", check_implicit_always},
1096 {"zvl1024b", "zvl512b", check_implicit_always},
1097 {"zvl512b", "zvl256b", check_implicit_always},
1098 {"zvl256b", "zvl128b", check_implicit_always},
1099 {"zvl128b", "zvl64b", check_implicit_always},
1100 {"zvl64b", "zvl32b", check_implicit_always},
1101 {"d", "f", check_implicit_always},
1102 {"f", "zicsr", check_implicit_always},
1103 {"zqinx", "zdinx", check_implicit_always},
1104 {"zdinx", "zfinx", check_implicit_always},
1105 {"zk", "zkn", check_implicit_always},
1106 {"zk", "zkr", check_implicit_always},
1107 {"zk", "zkt", check_implicit_always},
1108 {"zkn", "zbkb", check_implicit_always},
1109 {"zkn", "zbkc", check_implicit_always},
1110 {"zkn", "zbkx", check_implicit_always},
1111 {"zkn", "zkne", check_implicit_always},
1112 {"zkn", "zknd", check_implicit_always},
1113 {"zkn", "zknh", check_implicit_always},
1114 {"zks", "zbkb", check_implicit_always},
1115 {"zks", "zbkc", check_implicit_always},
1116 {"zks", "zbkx", check_implicit_always},
1117 {"zks", "zksed", check_implicit_always},
1118 {"zks", "zksh", check_implicit_always},
1119 {NULL, NULL, NULL}
1120 };
1121
1122 /* For default_enable field, decide if the extension should
1123 be enbaled by default. */
1124
1125 #define EXT_DEFAULT 0x1
1126
1127 /* List all extensions that binutils should know about. */
1128
1129 struct riscv_supported_ext
1130 {
1131 const char *name;
1132 enum riscv_spec_class isa_spec_class;
1133 int major_version;
1134 int minor_version;
1135 unsigned long default_enable;
1136 };
1137
1138 /* The standard extensions must be added in canonical order. */
1139
1140 static struct riscv_supported_ext riscv_supported_std_ext[] =
1141 {
1142 {"e", ISA_SPEC_CLASS_20191213, 1, 9, 0 },
1143 {"e", ISA_SPEC_CLASS_20190608, 1, 9, 0 },
1144 {"e", ISA_SPEC_CLASS_2P2, 1, 9, 0 },
1145 {"i", ISA_SPEC_CLASS_20191213, 2, 1, 0 },
1146 {"i", ISA_SPEC_CLASS_20190608, 2, 1, 0 },
1147 {"i", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
1148 /* The g is a special case which we don't want to output it,
1149 but still need it when adding implicit extensions. */
1150 {"g", ISA_SPEC_CLASS_NONE, RISCV_UNKNOWN_VERSION, RISCV_UNKNOWN_VERSION, EXT_DEFAULT },
1151 {"m", ISA_SPEC_CLASS_20191213, 2, 0, 0 },
1152 {"m", ISA_SPEC_CLASS_20190608, 2, 0, 0 },
1153 {"m", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
1154 {"a", ISA_SPEC_CLASS_20191213, 2, 1, 0 },
1155 {"a", ISA_SPEC_CLASS_20190608, 2, 0, 0 },
1156 {"a", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
1157 {"f", ISA_SPEC_CLASS_20191213, 2, 2, 0 },
1158 {"f", ISA_SPEC_CLASS_20190608, 2, 2, 0 },
1159 {"f", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
1160 {"d", ISA_SPEC_CLASS_20191213, 2, 2, 0 },
1161 {"d", ISA_SPEC_CLASS_20190608, 2, 2, 0 },
1162 {"d", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
1163 {"q", ISA_SPEC_CLASS_20191213, 2, 2, 0 },
1164 {"q", ISA_SPEC_CLASS_20190608, 2, 2, 0 },
1165 {"q", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
1166 {"c", ISA_SPEC_CLASS_20191213, 2, 0, 0 },
1167 {"c", ISA_SPEC_CLASS_20190608, 2, 0, 0 },
1168 {"c", ISA_SPEC_CLASS_2P2, 2, 0, 0 },
1169 {"v", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1170 {NULL, 0, 0, 0, 0}
1171 };
1172
1173 static struct riscv_supported_ext riscv_supported_std_z_ext[] =
1174 {
1175 {"zicbom", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1176 {"zicbop", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1177 {"zicboz", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1178 {"zicsr", ISA_SPEC_CLASS_20191213, 2, 0, 0 },
1179 {"zicsr", ISA_SPEC_CLASS_20190608, 2, 0, 0 },
1180 {"zifencei", ISA_SPEC_CLASS_20191213, 2, 0, 0 },
1181 {"zifencei", ISA_SPEC_CLASS_20190608, 2, 0, 0 },
1182 {"zihintpause", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1183 {"zfinx", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1184 {"zdinx", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1185 {"zqinx", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1186 {"zbb", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1187 {"zba", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1188 {"zbc", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1189 {"zbs", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1190 {"zbkb", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1191 {"zbkc", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1192 {"zbkx", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1193 {"zk", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1194 {"zkn", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1195 {"zknd", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1196 {"zkne", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1197 {"zknh", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1198 {"zkr", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1199 {"zks", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1200 {"zksed", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1201 {"zksh", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1202 {"zkt", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1203 {"zve32x", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1204 {"zve32f", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1205 {"zve32d", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1206 {"zve64x", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1207 {"zve64f", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1208 {"zve64d", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1209 {"zvl32b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1210 {"zvl64b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1211 {"zvl128b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1212 {"zvl256b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1213 {"zvl512b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1214 {"zvl1024b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1215 {"zvl2048b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1216 {"zvl4096b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1217 {"zvl8192b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1218 {"zvl16384b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1219 {"zvl32768b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1220 {"zvl65536b", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1221 {NULL, 0, 0, 0, 0}
1222 };
1223
1224 static struct riscv_supported_ext riscv_supported_std_s_ext[] =
1225 {
1226 {"svinval", ISA_SPEC_CLASS_DRAFT, 1, 0, 0 },
1227 {NULL, 0, 0, 0, 0}
1228 };
1229
1230 static struct riscv_supported_ext riscv_supported_std_h_ext[] =
1231 {
1232 {NULL, 0, 0, 0, 0}
1233 };
1234
1235 static struct riscv_supported_ext riscv_supported_std_zxm_ext[] =
1236 {
1237 {NULL, 0, 0, 0, 0}
1238 };
1239
1240 const struct riscv_supported_ext *riscv_all_supported_ext[] =
1241 {
1242 riscv_supported_std_ext,
1243 riscv_supported_std_z_ext,
1244 riscv_supported_std_s_ext,
1245 riscv_supported_std_h_ext,
1246 riscv_supported_std_zxm_ext,
1247 NULL
1248 };
1249
1250 /* ISA extension prefixed name class. Must define them in parsing order. */
1251 enum riscv_prefix_ext_class
1252 {
1253 RV_ISA_CLASS_Z = 1,
1254 RV_ISA_CLASS_S,
1255 RV_ISA_CLASS_H,
1256 RV_ISA_CLASS_ZXM,
1257 RV_ISA_CLASS_X,
1258 RV_ISA_CLASS_UNKNOWN
1259 };
1260
1261 /* Record the strings of the prefixed extensions, and their corresponding
1262 classes. The more letters of the prefix string, the more forward it must
1263 be defined. Otherwise, the riscv_get_prefix_class will map it to the
1264 wrong classes. */
1265 struct riscv_parse_prefix_config
1266 {
1267 /* Class of the extension. */
1268 enum riscv_prefix_ext_class class;
1269
1270 /* Prefix string for error printing and internal parser usage. */
1271 const char *prefix;
1272 };
1273 static const struct riscv_parse_prefix_config parse_config[] =
1274 {
1275 {RV_ISA_CLASS_ZXM, "zxm"},
1276 {RV_ISA_CLASS_Z, "z"},
1277 {RV_ISA_CLASS_S, "s"},
1278 {RV_ISA_CLASS_H, "h"},
1279 {RV_ISA_CLASS_X, "x"},
1280 {RV_ISA_CLASS_UNKNOWN, NULL}
1281 };
1282
1283 /* Get the prefixed name class for the extensions, the class also
1284 means the order of the prefixed extensions. */
1285
1286 static enum riscv_prefix_ext_class
1287 riscv_get_prefix_class (const char *arch)
1288 {
1289 int i = 0;
1290 while (parse_config[i].class != RV_ISA_CLASS_UNKNOWN)
1291 {
1292 if (strncmp (arch, parse_config[i].prefix,
1293 strlen (parse_config[i].prefix)) == 0)
1294 return parse_config[i].class;
1295 i++;
1296 }
1297 return RV_ISA_CLASS_UNKNOWN;
1298 }
1299
1300 /* Check KNOWN_EXTS to see if the EXT is supported. */
1301
1302 static bool
1303 riscv_known_prefixed_ext (const char *ext,
1304 struct riscv_supported_ext *known_exts)
1305 {
1306 size_t i;
1307 for (i = 0; known_exts[i].name != NULL; ++i)
1308 if (strcmp (ext, known_exts[i].name) == 0)
1309 return true;
1310 return false;
1311 }
1312
1313 /* Check whether the prefixed extension is recognized or not. Return
1314 true if recognized, otehrwise return false. */
1315
1316 static bool
1317 riscv_recognized_prefixed_ext (const char *ext)
1318 {
1319 enum riscv_prefix_ext_class class = riscv_get_prefix_class (ext);
1320 switch (class)
1321 {
1322 case RV_ISA_CLASS_Z:
1323 return riscv_known_prefixed_ext (ext, riscv_supported_std_z_ext);
1324 case RV_ISA_CLASS_ZXM:
1325 return riscv_known_prefixed_ext (ext, riscv_supported_std_zxm_ext);
1326 case RV_ISA_CLASS_S:
1327 return riscv_known_prefixed_ext (ext, riscv_supported_std_s_ext);
1328 case RV_ISA_CLASS_H:
1329 return riscv_known_prefixed_ext (ext, riscv_supported_std_h_ext);
1330 case RV_ISA_CLASS_X:
1331 /* Only the single x is unrecognized. */
1332 if (strcmp (ext, "x") != 0)
1333 return true;
1334 default:
1335 break;
1336 }
1337 return false;
1338 }
1339
1340 /* Canonical order for single letter extensions. */
1341 static const char riscv_ext_canonical_order[] = "eigmafdqlcbjktpvn";
1342
1343 /* Array is used to compare the orders of standard extensions quickly. */
1344 static int riscv_ext_order[26] = {0};
1345
1346 /* Init the riscv_ext_order array. */
1347
1348 static void
1349 riscv_init_ext_order (void)
1350 {
1351 static bool inited = false;
1352 if (inited)
1353 return;
1354
1355 /* The orders of all standard extensions are positive. */
1356 int order = 1;
1357
1358 for (const char *ext = &riscv_ext_canonical_order[0]; *ext; ++ext)
1359 riscv_ext_order[(*ext - 'a')] = order++;
1360
1361 /* Some of the prefixed keyword are not single letter, so we set
1362 their prefixed orders in the riscv_compare_subsets directly,
1363 not through the riscv_ext_order. */
1364
1365 inited = true;
1366 }
1367
1368 /* Similar to the strcmp. It returns an integer less than, equal to,
1369 or greater than zero if `subset2` is found, respectively, to be less
1370 than, to match, or be greater than `subset1`.
1371
1372 The order values,
1373 Zero: Preserved keywords.
1374 Positive number: Standard extensions.
1375 Negative number: Prefixed keywords. */
1376
1377 int
1378 riscv_compare_subsets (const char *subset1, const char *subset2)
1379 {
1380 int order1 = riscv_ext_order[(*subset1 - 'a')];
1381 int order2 = riscv_ext_order[(*subset2 - 'a')];
1382
1383 /* Compare the standard extension first. */
1384 if (order1 > 0 && order2 > 0)
1385 return order1 - order2;
1386
1387 /* Set the prefixed orders to negative numbers. */
1388 enum riscv_prefix_ext_class class1 = riscv_get_prefix_class (subset1);
1389 enum riscv_prefix_ext_class class2 = riscv_get_prefix_class (subset2);
1390
1391 if (class1 != RV_ISA_CLASS_UNKNOWN)
1392 order1 = - (int) class1;
1393 if (class2 != RV_ISA_CLASS_UNKNOWN)
1394 order2 = - (int) class2;
1395
1396 if (order1 == order2)
1397 {
1398 /* Compare the standard addition z extensions. */
1399 if (class1 == RV_ISA_CLASS_Z)
1400 {
1401 order1 = riscv_ext_order[(*++subset1 - 'a')];
1402 order2 = riscv_ext_order[(*++subset2 - 'a')];
1403 if (order1 != order2)
1404 return order1 - order2;
1405 }
1406 return strcasecmp (++subset1, ++subset2);
1407 }
1408
1409 return order2 - order1;
1410 }
1411
1412 /* Find subset in the list. Return TRUE and set `current` to the subset
1413 if it is found. Otherwise, return FALSE and set `current` to the place
1414 where we should insert the subset. However, return FALSE with the NULL
1415 `current` means we should insert the subset at the head of subset list,
1416 if needed. */
1417
1418 bool
1419 riscv_lookup_subset (const riscv_subset_list_t *subset_list,
1420 const char *subset,
1421 riscv_subset_t **current)
1422 {
1423 riscv_subset_t *s, *pre_s = NULL;
1424
1425 /* If the subset is added in order, then just add it at the tail. */
1426 if (subset_list->tail != NULL
1427 && riscv_compare_subsets (subset_list->tail->name, subset) < 0)
1428 {
1429 *current = subset_list->tail;
1430 return false;
1431 }
1432
1433 for (s = subset_list->head;
1434 s != NULL;
1435 pre_s = s, s = s->next)
1436 {
1437 int cmp = riscv_compare_subsets (s->name, subset);
1438 if (cmp == 0)
1439 {
1440 *current = s;
1441 return true;
1442 }
1443 else if (cmp > 0)
1444 break;
1445 }
1446 *current = pre_s;
1447
1448 return false;
1449 }
1450
1451 /* Add the extension to the subset list. Search the
1452 list first, and then find the right place to add. */
1453
1454 void
1455 riscv_add_subset (riscv_subset_list_t *subset_list,
1456 const char *subset,
1457 int major,
1458 int minor)
1459 {
1460 riscv_subset_t *current, *new;
1461
1462 if (riscv_lookup_subset (subset_list, subset, &current))
1463 return;
1464
1465 new = xmalloc (sizeof *new);
1466 new->name = xstrdup (subset);
1467 new->major_version = major;
1468 new->minor_version = minor;
1469 new->next = NULL;
1470
1471 if (current != NULL)
1472 {
1473 new->next = current->next;
1474 current->next = new;
1475 }
1476 else
1477 {
1478 new->next = subset_list->head;
1479 subset_list->head = new;
1480 }
1481
1482 if (new->next == NULL)
1483 subset_list->tail = new;
1484 }
1485
1486 /* Get the default versions from the riscv_supported_*ext tables. */
1487
1488 static void
1489 riscv_get_default_ext_version (enum riscv_spec_class *default_isa_spec,
1490 const char *name,
1491 int *major_version,
1492 int *minor_version)
1493 {
1494 if (name == NULL
1495 || default_isa_spec == NULL
1496 || *default_isa_spec == ISA_SPEC_CLASS_NONE)
1497 return;
1498
1499 struct riscv_supported_ext *table = NULL;
1500 enum riscv_prefix_ext_class class = riscv_get_prefix_class (name);
1501 switch (class)
1502 {
1503 case RV_ISA_CLASS_ZXM: table = riscv_supported_std_zxm_ext; break;
1504 case RV_ISA_CLASS_Z: table = riscv_supported_std_z_ext; break;
1505 case RV_ISA_CLASS_S: table = riscv_supported_std_s_ext; break;
1506 case RV_ISA_CLASS_H: table = riscv_supported_std_h_ext; break;
1507 case RV_ISA_CLASS_X:
1508 break;
1509 default:
1510 table = riscv_supported_std_ext;
1511 }
1512
1513 int i = 0;
1514 while (table != NULL && table[i].name != NULL)
1515 {
1516 if (strcmp (table[i].name, name) == 0
1517 && (table[i].isa_spec_class == ISA_SPEC_CLASS_DRAFT
1518 || table[i].isa_spec_class == *default_isa_spec))
1519 {
1520 *major_version = table[i].major_version;
1521 *minor_version = table[i].minor_version;
1522 return;
1523 }
1524 i++;
1525 }
1526 }
1527
1528 /* Find the default versions for the extension before adding them to
1529 the subset list, if their versions are RISCV_UNKNOWN_VERSION.
1530 Afterwards, report errors if we can not find their default versions. */
1531
1532 static void
1533 riscv_parse_add_subset (riscv_parse_subset_t *rps,
1534 const char *subset,
1535 int major,
1536 int minor,
1537 bool implicit)
1538 {
1539 int major_version = major;
1540 int minor_version = minor;
1541
1542 if (major_version == RISCV_UNKNOWN_VERSION
1543 || minor_version == RISCV_UNKNOWN_VERSION)
1544 riscv_get_default_ext_version (rps->isa_spec, subset,
1545 &major_version, &minor_version);
1546
1547 /* We don't care the versions of the implicit extensions. */
1548 if (!implicit
1549 && (major_version == RISCV_UNKNOWN_VERSION
1550 || minor_version == RISCV_UNKNOWN_VERSION))
1551 {
1552 if (subset[0] == 'x')
1553 rps->error_handler
1554 (_("x ISA extension `%s' must be set with the versions"),
1555 subset);
1556 /* Allow old ISA spec can recognize zicsr and zifencei. */
1557 else if (strcmp (subset, "zicsr") != 0
1558 && strcmp (subset, "zifencei") != 0)
1559 rps->error_handler
1560 (_("cannot find default versions of the ISA extension `%s'"),
1561 subset);
1562 return;
1563 }
1564
1565 riscv_add_subset (rps->subset_list, subset,
1566 major_version, minor_version);
1567 }
1568
1569 /* Release subset list. */
1570
1571 void
1572 riscv_release_subset_list (riscv_subset_list_t *subset_list)
1573 {
1574 while (subset_list->head != NULL)
1575 {
1576 riscv_subset_t *next = subset_list->head->next;
1577 free ((void *)subset_list->head->name);
1578 free (subset_list->head);
1579 subset_list->head = next;
1580 }
1581
1582 subset_list->tail = NULL;
1583 }
1584
1585 /* Parsing extension version.
1586
1587 Return Value:
1588 Points to the end of version
1589
1590 Arguments:
1591 `p`: Curent parsing position.
1592 `major_version`: Parsed major version.
1593 `minor_version`: Parsed minor version. */
1594
1595 static const char *
1596 riscv_parsing_subset_version (const char *p,
1597 int *major_version,
1598 int *minor_version)
1599 {
1600 bool major_p = true;
1601 int version = 0;
1602 char np;
1603
1604 *major_version = 0;
1605 *minor_version = 0;
1606 for (; *p; ++p)
1607 {
1608 if (*p == 'p')
1609 {
1610 np = *(p + 1);
1611
1612 /* Might be beginning of `p` extension. */
1613 if (!ISDIGIT (np))
1614 break;
1615
1616 *major_version = version;
1617 major_p = false;
1618 version = 0;
1619 }
1620 else if (ISDIGIT (*p))
1621 version = (version * 10) + (*p - '0');
1622 else
1623 break;
1624 }
1625
1626 if (major_p)
1627 *major_version = version;
1628 else
1629 *minor_version = version;
1630
1631 /* We can not find any version in string. */
1632 if (*major_version == 0 && *minor_version == 0)
1633 {
1634 *major_version = RISCV_UNKNOWN_VERSION;
1635 *minor_version = RISCV_UNKNOWN_VERSION;
1636 }
1637
1638 return p;
1639 }
1640
1641 /* Parsing function for standard extensions.
1642
1643 Return Value:
1644 Points to the end of extensions.
1645
1646 Arguments:
1647 `rps`: Hooks and status for parsing extensions.
1648 `arch`: Full ISA string.
1649 `p`: Curent parsing position. */
1650
1651 static const char *
1652 riscv_parse_std_ext (riscv_parse_subset_t *rps,
1653 const char *arch,
1654 const char *p)
1655 {
1656 /* First letter must start with i, e or g. */
1657 if (*p != 'e' && *p != 'i' && *p != 'g')
1658 {
1659 rps->error_handler
1660 (_("%s: first ISA extension must be `e', `i' or `g'"),
1661 arch);
1662 return NULL;
1663 }
1664
1665 while (p != NULL && *p != '\0')
1666 {
1667 /* Stop when we parsed the known prefix class. */
1668 enum riscv_prefix_ext_class class = riscv_get_prefix_class (p);
1669 if (class != RV_ISA_CLASS_UNKNOWN)
1670 break;
1671
1672 if (*p == '_')
1673 {
1674 p++;
1675 continue;
1676 }
1677
1678 bool implicit = false;
1679 int major = RISCV_UNKNOWN_VERSION;
1680 int minor = RISCV_UNKNOWN_VERSION;
1681 char subset[2] = {0, 0};
1682
1683 subset[0] = *p;
1684
1685 /* Check if the standard extension is supported. */
1686 if (riscv_ext_order[(subset[0] - 'a')] == 0)
1687 {
1688 rps->error_handler
1689 (_("%s: unknown standard ISA extension `%c'"),
1690 arch, subset[0]);
1691 return NULL;
1692 }
1693
1694 /* Checking canonical order. */
1695 if (rps->subset_list->tail != NULL
1696 && riscv_compare_subsets (rps->subset_list->tail->name, subset) > 0)
1697 {
1698 rps->error_handler
1699 (_("%s: standard ISA extension `%c' is not "
1700 "in canonical order"), arch, subset[0]);
1701 return NULL;
1702 }
1703
1704 p = riscv_parsing_subset_version (++p, &major, &minor);
1705 /* Added g as an implicit extension. */
1706 if (subset[0] == 'g')
1707 {
1708 implicit = true;
1709 major = RISCV_UNKNOWN_VERSION;
1710 minor = RISCV_UNKNOWN_VERSION;
1711 }
1712 riscv_parse_add_subset (rps, subset, major, minor, implicit);
1713 }
1714
1715 return p;
1716 }
1717
1718 /* Parsing function for prefixed extensions.
1719
1720 Return Value:
1721 Points to the end of extension.
1722
1723 Arguments:
1724 `rps`: Hooks and status for parsing extensions.
1725 `arch`: Full ISA string.
1726 `p`: Curent parsing position. */
1727
1728 static const char *
1729 riscv_parse_prefixed_ext (riscv_parse_subset_t *rps,
1730 const char *arch,
1731 const char *p)
1732 {
1733 int major_version;
1734 int minor_version;
1735 const char *last_name;
1736 enum riscv_prefix_ext_class class;
1737
1738 while (*p)
1739 {
1740 if (*p == '_')
1741 {
1742 p++;
1743 continue;
1744 }
1745
1746 class = riscv_get_prefix_class (p);
1747 if (class == RV_ISA_CLASS_UNKNOWN)
1748 {
1749 rps->error_handler
1750 (_("%s: unknown prefix class for the ISA extension `%s'"),
1751 arch, p);
1752 return NULL;
1753 }
1754
1755 char *subset = xstrdup (p);
1756 char *q = subset;
1757 const char *end_of_version;
1758
1759 /* Extract the whole prefixed extension by '_'. */
1760 while (*++q != '\0' && *q != '_')
1761 ;
1762 /* Look forward to the first letter which is not <major>p<minor>. */
1763 bool find_any_version = false;
1764 bool find_minor_version = false;
1765 while (1)
1766 {
1767 q--;
1768 if (ISDIGIT (*q))
1769 find_any_version = true;
1770 else if (find_any_version
1771 && !find_minor_version
1772 && *q == 'p'
1773 && ISDIGIT (*(q - 1)))
1774 find_minor_version = true;
1775 else
1776 break;
1777 }
1778 q++;
1779
1780 /* Check if the end of extension is 'p' or not. If yes, then
1781 the second letter from the end cannot be number. */
1782 if (*(q - 1) == 'p' && ISDIGIT (*(q - 2)))
1783 {
1784 *q = '\0';
1785 rps->error_handler
1786 (_("%s: invalid prefixed ISA extension `%s' ends with <number>p"),
1787 arch, subset);
1788 free (subset);
1789 return NULL;
1790 }
1791
1792 end_of_version =
1793 riscv_parsing_subset_version (q, &major_version, &minor_version);
1794 *q = '\0';
1795 if (end_of_version == NULL)
1796 {
1797 free (subset);
1798 return NULL;
1799 }
1800
1801 /* Check that the extension name is well-formed. */
1802 if (rps->check_unknown_prefixed_ext
1803 && !riscv_recognized_prefixed_ext (subset))
1804 {
1805 rps->error_handler
1806 (_("%s: unknown prefixed ISA extension `%s'"),
1807 arch, subset);
1808 free (subset);
1809 return NULL;
1810 }
1811
1812 /* Check that the extension isn't duplicate. */
1813 last_name = rps->subset_list->tail->name;
1814 if (!strcasecmp (last_name, subset))
1815 {
1816 rps->error_handler
1817 (_("%s: duplicate prefixed ISA extension `%s'"),
1818 arch, subset);
1819 free (subset);
1820 return NULL;
1821 }
1822
1823 /* Check that the extension is in expected order. */
1824 if (riscv_compare_subsets (last_name, subset) > 0)
1825 {
1826 rps->error_handler
1827 (_("%s: prefixed ISA extension `%s' is not in expected "
1828 "order. It must come before `%s'"),
1829 arch, subset, last_name);
1830 free (subset);
1831 return NULL;
1832 }
1833
1834 riscv_parse_add_subset (rps, subset,
1835 major_version,
1836 minor_version, false);
1837 p += end_of_version - subset;
1838 free (subset);
1839
1840 if (*p != '\0' && *p != '_')
1841 {
1842 rps->error_handler
1843 (_("%s: prefixed ISA extension must separate with _"),
1844 arch);
1845 return NULL;
1846 }
1847 }
1848
1849 return p;
1850 }
1851
1852 /* Add the implicit extensions. */
1853
1854 static void
1855 riscv_parse_add_implicit_subsets (riscv_parse_subset_t *rps)
1856 {
1857 struct riscv_implicit_subset *t = riscv_implicit_subsets;
1858 for (; t->subset_name; t++)
1859 {
1860 riscv_subset_t *subset = NULL;
1861 if (riscv_lookup_subset (rps->subset_list, t->subset_name, &subset)
1862 && t->check_func (t->implicit_name, subset))
1863 riscv_parse_add_subset (rps, t->implicit_name,
1864 RISCV_UNKNOWN_VERSION,
1865 RISCV_UNKNOWN_VERSION, true);
1866 }
1867 }
1868
1869 /* Check extensions conflicts. */
1870
1871 static bool
1872 riscv_parse_check_conflicts (riscv_parse_subset_t *rps)
1873 {
1874 riscv_subset_t *subset = NULL;
1875 int xlen = *rps->xlen;
1876 bool no_conflict = true;
1877
1878 if (riscv_lookup_subset (rps->subset_list, "e", &subset)
1879 && xlen > 32)
1880 {
1881 rps->error_handler
1882 (_("rv%d does not support the `e' extension"), xlen);
1883 no_conflict = false;
1884 }
1885 if (riscv_lookup_subset (rps->subset_list, "q", &subset)
1886 && xlen < 64)
1887 {
1888 rps->error_handler
1889 (_("rv%d does not support the `q' extension"), xlen);
1890 no_conflict = false;
1891 }
1892 if (riscv_lookup_subset (rps->subset_list, "e", &subset)
1893 && riscv_lookup_subset (rps->subset_list, "f", &subset))
1894 {
1895 rps->error_handler
1896 (_("rv32e does not support the `f' extension"));
1897 no_conflict = false;
1898 }
1899 if (riscv_lookup_subset (rps->subset_list, "zfinx", &subset)
1900 && riscv_lookup_subset (rps->subset_list, "f", &subset))
1901 {
1902 rps->error_handler
1903 (_("`zfinx' is conflict with the `f/d/q' extension"));
1904 no_conflict = false;
1905 }
1906
1907 bool support_zve = false;
1908 bool support_zvl = false;
1909 riscv_subset_t *s = rps->subset_list->head;
1910 for (; s != NULL; s = s->next)
1911 {
1912 if (!support_zve
1913 && strncmp (s->name, "zve", 3) == 0)
1914 support_zve = true;
1915 if (!support_zvl
1916 && strncmp (s->name, "zvl", 3) == 0)
1917 support_zvl = true;
1918 if (support_zve && support_zvl)
1919 break;
1920 }
1921 if (support_zvl && !support_zve)
1922 {
1923 rps->error_handler
1924 (_("zvl*b extensions need to enable either `v' or `zve' extension"));
1925 no_conflict = false;
1926 }
1927
1928 return no_conflict;
1929 }
1930
1931 /* Set the default subset list according to the default_enable field
1932 of riscv_supported_*ext tables. */
1933
1934 static void
1935 riscv_set_default_arch (riscv_parse_subset_t *rps)
1936 {
1937 unsigned long enable = EXT_DEFAULT;
1938 int i, j;
1939 for (i = 0; riscv_all_supported_ext[i] != NULL; i++)
1940 {
1941 const struct riscv_supported_ext *table = riscv_all_supported_ext[i];
1942 for (j = 0; table[j].name != NULL; j++)
1943 {
1944 bool implicit = false;
1945 if (strcmp (table[j].name, "g") == 0)
1946 implicit = true;
1947 if (table[j].default_enable & enable)
1948 riscv_parse_add_subset (rps, table[j].name,
1949 RISCV_UNKNOWN_VERSION,
1950 RISCV_UNKNOWN_VERSION, implicit);
1951 }
1952 }
1953 }
1954
1955 /* Function for parsing ISA string.
1956
1957 Return Value:
1958 Return TRUE on success.
1959
1960 Arguments:
1961 `rps`: Hooks and status for parsing extensions.
1962 `arch`: Full ISA string. */
1963
1964 bool
1965 riscv_parse_subset (riscv_parse_subset_t *rps,
1966 const char *arch)
1967 {
1968 const char *p;
1969
1970 /* Init the riscv_ext_order array to compare the order of extensions
1971 quickly. */
1972 riscv_init_ext_order ();
1973
1974 if (arch == NULL)
1975 {
1976 riscv_set_default_arch (rps);
1977 riscv_parse_add_implicit_subsets (rps);
1978 return riscv_parse_check_conflicts (rps);
1979 }
1980
1981 for (p = arch; *p != '\0'; p++)
1982 {
1983 if (ISUPPER (*p))
1984 {
1985 rps->error_handler
1986 (_("%s: ISA string cannot contain uppercase letters"),
1987 arch);
1988 return false;
1989 }
1990 }
1991
1992 p = arch;
1993 if (startswith (p, "rv32"))
1994 {
1995 *rps->xlen = 32;
1996 p += 4;
1997 }
1998 else if (startswith (p, "rv64"))
1999 {
2000 *rps->xlen = 64;
2001 p += 4;
2002 }
2003 else
2004 {
2005 /* ISA string shouldn't be NULL or empty here. For linker,
2006 it might be empty when we failed to merge the ISA string
2007 in the riscv_merge_attributes. For assembler, we might
2008 give an empty string by .attribute arch, "" or -march=.
2009 However, We have already issued the correct error message
2010 in another side, so do not issue this error when the ISA
2011 string is empty. */
2012 if (strlen (arch))
2013 rps->error_handler (
2014 _("%s: ISA string must begin with rv32 or rv64"),
2015 arch);
2016 return false;
2017 }
2018
2019 /* Parsing standard extension. */
2020 p = riscv_parse_std_ext (rps, arch, p);
2021
2022 if (p == NULL)
2023 return false;
2024
2025 /* Parse prefixed extensions. */
2026 p = riscv_parse_prefixed_ext (rps, arch, p);
2027
2028 if (p == NULL)
2029 return false;
2030
2031 /* Finally add implicit extensions according to the current
2032 extensions. */
2033 riscv_parse_add_implicit_subsets (rps);
2034
2035 /* Check the conflicts. */
2036 return riscv_parse_check_conflicts (rps);
2037 }
2038
2039 /* Return the number of digits for the input. */
2040
2041 size_t
2042 riscv_estimate_digit (unsigned num)
2043 {
2044 size_t digit = 0;
2045 if (num == 0)
2046 return 1;
2047
2048 for (digit = 0; num ; num /= 10)
2049 digit++;
2050
2051 return digit;
2052 }
2053
2054 /* Auxiliary function to estimate string length of subset list. */
2055
2056 static size_t
2057 riscv_estimate_arch_strlen1 (const riscv_subset_t *subset)
2058 {
2059 if (subset == NULL)
2060 return 6; /* For rv32/rv64/rv128 and string terminator. */
2061
2062 return riscv_estimate_arch_strlen1 (subset->next)
2063 + strlen (subset->name)
2064 + riscv_estimate_digit (subset->major_version)
2065 + 1 /* For version seperator 'p'. */
2066 + riscv_estimate_digit (subset->minor_version)
2067 + 1 /* For underscore. */;
2068 }
2069
2070 /* Estimate the string length of this subset list. */
2071
2072 static size_t
2073 riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list)
2074 {
2075 return riscv_estimate_arch_strlen1 (subset_list->head);
2076 }
2077
2078 /* Auxiliary function to convert subset info to string. */
2079
2080 static void
2081 riscv_arch_str1 (riscv_subset_t *subset,
2082 char *attr_str, char *buf, size_t bufsz)
2083 {
2084 const char *underline = "_";
2085 riscv_subset_t *subset_t = subset;
2086
2087 if (subset_t == NULL)
2088 return;
2089
2090 /* No underline between rvXX and i/e. */
2091 if ((strcasecmp (subset_t->name, "i") == 0)
2092 || (strcasecmp (subset_t->name, "e") == 0))
2093 underline = "";
2094
2095 snprintf (buf, bufsz, "%s%s%dp%d",
2096 underline,
2097 subset_t->name,
2098 subset_t->major_version,
2099 subset_t->minor_version);
2100
2101 strncat (attr_str, buf, bufsz);
2102
2103 /* Skip 'i' extension after 'e', or skip extensions which
2104 versions are unknown. */
2105 while (subset_t->next
2106 && ((strcmp (subset_t->name, "e") == 0
2107 && strcmp (subset_t->next->name, "i") == 0)
2108 || subset_t->next->major_version == RISCV_UNKNOWN_VERSION
2109 || subset_t->next->minor_version == RISCV_UNKNOWN_VERSION))
2110 subset_t = subset_t->next;
2111
2112 riscv_arch_str1 (subset_t->next, attr_str, buf, bufsz);
2113 }
2114
2115 /* Convert subset information into string with explicit versions. */
2116
2117 char *
2118 riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset)
2119 {
2120 size_t arch_str_len = riscv_estimate_arch_strlen (subset);
2121 char *attr_str = xmalloc (arch_str_len);
2122 char *buf = xmalloc (arch_str_len);
2123
2124 snprintf (attr_str, arch_str_len, "rv%u", xlen);
2125
2126 riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len);
2127 free (buf);
2128
2129 return attr_str;
2130 }
2131
2132 /* Copy the subset in the subset list. */
2133
2134 static struct riscv_subset_t *
2135 riscv_copy_subset (riscv_subset_list_t *subset_list,
2136 riscv_subset_t *subset)
2137 {
2138 if (subset == NULL)
2139 return NULL;
2140
2141 riscv_subset_t *new = xmalloc (sizeof *new);
2142 new->name = xstrdup (subset->name);
2143 new->major_version = subset->major_version;
2144 new->minor_version = subset->minor_version;
2145 new->next = riscv_copy_subset (subset_list, subset->next);
2146
2147 if (subset->next == NULL)
2148 subset_list->tail = new;
2149
2150 return new;
2151 }
2152
2153 /* Copy the subset list. */
2154
2155 riscv_subset_list_t *
2156 riscv_copy_subset_list (riscv_subset_list_t *subset_list)
2157 {
2158 riscv_subset_list_t *new = xmalloc (sizeof *new);
2159 new->head = riscv_copy_subset (new, subset_list->head);
2160 return new;
2161 }
2162
2163 /* Remove the SUBSET from the subset list. */
2164
2165 static void
2166 riscv_remove_subset (riscv_subset_list_t *subset_list,
2167 const char *subset)
2168 {
2169 riscv_subset_t *current = subset_list->head;
2170 riscv_subset_t *pre = NULL;
2171 for (; current != NULL; pre = current, current = current->next)
2172 {
2173 if (strcmp (current->name, subset) == 0)
2174 {
2175 if (pre == NULL)
2176 subset_list->head = current->next;
2177 else
2178 pre->next = current->next;
2179 if (current->next == NULL)
2180 subset_list->tail = pre;
2181 free ((void *) current->name);
2182 free (current);
2183 break;
2184 }
2185 }
2186 }
2187
2188 /* Add/Remove an extension to/from the subset list. This is used for
2189 the .option rvc or norvc, and .option arch directives. */
2190
2191 bool
2192 riscv_update_subset (riscv_parse_subset_t *rps,
2193 const char *str)
2194 {
2195 const char *p = str;
2196
2197 do
2198 {
2199 int major_version = RISCV_UNKNOWN_VERSION;
2200 int minor_version = RISCV_UNKNOWN_VERSION;
2201
2202 bool removed = false;
2203 switch (*p)
2204 {
2205 case '+': removed = false; break;
2206 case '-': removed = true; break;
2207 default:
2208 riscv_release_subset_list (rps->subset_list);
2209 return riscv_parse_subset (rps, p);
2210 }
2211 ++p;
2212
2213 char *subset = xstrdup (p);
2214 char *q = subset;
2215 const char *end_of_version;
2216 /* Extract the whole prefixed extension by ','. */
2217 while (*q != '\0' && *q != ',')
2218 q++;
2219
2220 /* Look forward to the first letter which is not <major>p<minor>. */
2221 bool find_any_version = false;
2222 bool find_minor_version = false;
2223 size_t len = q - subset;
2224 size_t i;
2225 for (i = len; i > 0; i--)
2226 {
2227 q--;
2228 if (ISDIGIT (*q))
2229 find_any_version = true;
2230 else if (find_any_version
2231 && !find_minor_version
2232 && *q == 'p'
2233 && ISDIGIT (*(q - 1)))
2234 find_minor_version = true;
2235 else
2236 break;
2237 }
2238 if (len > 0)
2239 q++;
2240
2241 /* Check if the end of extension is 'p' or not. If yes, then
2242 the second letter from the end cannot be number. */
2243 if (len > 1 && *(q - 1) == 'p' && ISDIGIT (*(q - 2)))
2244 {
2245 *q = '\0';
2246 rps->error_handler
2247 (_("invalid ISA extension ends with <number>p "
2248 "in .option arch `%s'"), str);
2249 free (subset);
2250 return false;
2251 }
2252
2253 end_of_version =
2254 riscv_parsing_subset_version (q, &major_version, &minor_version);
2255 *q = '\0';
2256 if (end_of_version == NULL)
2257 {
2258 free (subset);
2259 return false;
2260 }
2261
2262 if (strlen (subset) == 0
2263 || (strlen (subset) == 1
2264 && riscv_ext_order[(*subset - 'a')] == 0)
2265 || (strlen (subset) > 1
2266 && rps->check_unknown_prefixed_ext
2267 && !riscv_recognized_prefixed_ext (subset)))
2268 {
2269 rps->error_handler
2270 (_("unknown ISA extension `%s' in .option arch `%s'"),
2271 subset, str);
2272 free (subset);
2273 return false;
2274 }
2275
2276 if (strcmp (subset, "i") == 0
2277 || strcmp (subset, "e") == 0
2278 || strcmp (subset, "g") == 0)
2279 {
2280 rps->error_handler
2281 (_("cannot + or - base extension `%s' in .option "
2282 "arch `%s'"), subset, str);
2283 free (subset);
2284 return false;
2285 }
2286
2287 if (removed)
2288 riscv_remove_subset (rps->subset_list, subset);
2289 else
2290 riscv_parse_add_subset (rps, subset, major_version, minor_version, true);
2291 p += end_of_version - subset;
2292 free (subset);
2293 }
2294 while (*p++ == ',');
2295
2296 riscv_parse_add_implicit_subsets (rps);
2297 return riscv_parse_check_conflicts (rps);
2298 }
2299
2300 /* Check if the FEATURE subset is supported or not in the subset list.
2301 Return true if it is supported; Otherwise, return false. */
2302
2303 bool
2304 riscv_subset_supports (riscv_parse_subset_t *rps,
2305 const char *feature)
2306 {
2307 struct riscv_subset_t *subset;
2308 return riscv_lookup_subset (rps->subset_list, feature, &subset);
2309 }
2310
2311 /* Each instuction is belonged to an instruction class INSN_CLASS_*.
2312 Call riscv_subset_supports to make sure if the instuction is valid. */
2313
2314 bool
2315 riscv_multi_subset_supports (riscv_parse_subset_t *rps,
2316 enum riscv_insn_class insn_class)
2317 {
2318 switch (insn_class)
2319 {
2320 case INSN_CLASS_I:
2321 return riscv_subset_supports (rps, "i");
2322 case INSN_CLASS_ZICBOM:
2323 return riscv_subset_supports (rps, "zicbom");
2324 case INSN_CLASS_ZICBOP:
2325 return riscv_subset_supports (rps, "zicbop");
2326 case INSN_CLASS_ZICBOZ:
2327 return riscv_subset_supports (rps, "zicboz");
2328 case INSN_CLASS_ZICSR:
2329 return riscv_subset_supports (rps, "zicsr");
2330 case INSN_CLASS_ZIFENCEI:
2331 return riscv_subset_supports (rps, "zifencei");
2332 case INSN_CLASS_ZIHINTPAUSE:
2333 return riscv_subset_supports (rps, "zihintpause");
2334 case INSN_CLASS_M:
2335 return riscv_subset_supports (rps, "m");
2336 case INSN_CLASS_A:
2337 return riscv_subset_supports (rps, "a");
2338 case INSN_CLASS_F:
2339 return riscv_subset_supports (rps, "f");
2340 case INSN_CLASS_D:
2341 return riscv_subset_supports (rps, "d");
2342 case INSN_CLASS_Q:
2343 return riscv_subset_supports (rps, "q");
2344 case INSN_CLASS_C:
2345 return riscv_subset_supports (rps, "c");
2346 case INSN_CLASS_F_AND_C:
2347 return (riscv_subset_supports (rps, "f")
2348 && riscv_subset_supports (rps, "c"));
2349 case INSN_CLASS_D_AND_C:
2350 return (riscv_subset_supports (rps, "d")
2351 && riscv_subset_supports (rps, "c"));
2352 case INSN_CLASS_F_OR_ZFINX:
2353 return (riscv_subset_supports (rps, "f")
2354 || riscv_subset_supports (rps, "zfinx"));
2355 case INSN_CLASS_D_OR_ZDINX:
2356 return (riscv_subset_supports (rps, "d")
2357 || riscv_subset_supports (rps, "zdinx"));
2358 case INSN_CLASS_Q_OR_ZQINX:
2359 return (riscv_subset_supports (rps, "q")
2360 || riscv_subset_supports (rps, "zqinx"));
2361 case INSN_CLASS_ZBA:
2362 return riscv_subset_supports (rps, "zba");
2363 case INSN_CLASS_ZBB:
2364 return riscv_subset_supports (rps, "zbb");
2365 case INSN_CLASS_ZBC:
2366 return riscv_subset_supports (rps, "zbc");
2367 case INSN_CLASS_ZBS:
2368 return riscv_subset_supports (rps, "zbs");
2369 case INSN_CLASS_ZBKB:
2370 return riscv_subset_supports (rps, "zbkb");
2371 case INSN_CLASS_ZBKC:
2372 return riscv_subset_supports (rps, "zbkc");
2373 case INSN_CLASS_ZBKX:
2374 return riscv_subset_supports (rps, "zbkx");
2375 case INSN_CLASS_ZBB_OR_ZBKB:
2376 return (riscv_subset_supports (rps, "zbb")
2377 || riscv_subset_supports (rps, "zbkb"));
2378 case INSN_CLASS_ZBC_OR_ZBKC:
2379 return (riscv_subset_supports (rps, "zbc")
2380 || riscv_subset_supports (rps, "zbkc"));
2381 case INSN_CLASS_ZKND:
2382 return riscv_subset_supports (rps, "zknd");
2383 case INSN_CLASS_ZKNE:
2384 return riscv_subset_supports (rps, "zkne");
2385 case INSN_CLASS_ZKNH:
2386 return riscv_subset_supports (rps, "zknh");
2387 case INSN_CLASS_ZKND_OR_ZKNE:
2388 return (riscv_subset_supports (rps, "zknd")
2389 || riscv_subset_supports (rps, "zkne"));
2390 case INSN_CLASS_ZKSED:
2391 return riscv_subset_supports (rps, "zksed");
2392 case INSN_CLASS_ZKSH:
2393 return riscv_subset_supports (rps, "zksh");
2394 case INSN_CLASS_V:
2395 return (riscv_subset_supports (rps, "v")
2396 || riscv_subset_supports (rps, "zve64x")
2397 || riscv_subset_supports (rps, "zve32x"));
2398 case INSN_CLASS_ZVEF:
2399 return (riscv_subset_supports (rps, "v")
2400 || riscv_subset_supports (rps, "zve64d")
2401 || riscv_subset_supports (rps, "zve64f")
2402 || riscv_subset_supports (rps, "zve32f"));
2403 case INSN_CLASS_SVINVAL:
2404 return riscv_subset_supports (rps, "svinval");
2405 default:
2406 rps->error_handler
2407 (_("internal: unreachable INSN_CLASS_*"));
2408 return false;
2409 }
2410 }
2411
2412 /* Each instuction is belonged to an instruction class INSN_CLASS_*.
2413 Call riscv_subset_supports_ext to determine the missing extension. */
2414
2415 const char *
2416 riscv_multi_subset_supports_ext (riscv_parse_subset_t *rps,
2417 enum riscv_insn_class insn_class)
2418 {
2419 switch (insn_class)
2420 {
2421 case INSN_CLASS_I:
2422 return "i";
2423 case INSN_CLASS_ZICSR:
2424 return "zicsr";
2425 case INSN_CLASS_ZIFENCEI:
2426 return "zifencei";
2427 case INSN_CLASS_ZIHINTPAUSE:
2428 return "zihintpause";
2429 case INSN_CLASS_M:
2430 return "m";
2431 case INSN_CLASS_A:
2432 return "a";
2433 case INSN_CLASS_F:
2434 return "f";
2435 case INSN_CLASS_D:
2436 return "d";
2437 case INSN_CLASS_Q:
2438 return "q";
2439 case INSN_CLASS_C:
2440 return "c";
2441 case INSN_CLASS_F_AND_C:
2442 if (!riscv_subset_supports (rps, "f")
2443 && !riscv_subset_supports (rps, "c"))
2444 return "f' and `c";
2445 else if (!riscv_subset_supports (rps, "f"))
2446 return "f";
2447 else
2448 return "c";
2449 case INSN_CLASS_D_AND_C:
2450 if (!riscv_subset_supports (rps, "d")
2451 && !riscv_subset_supports (rps, "c"))
2452 return "d' and `c";
2453 else if (!riscv_subset_supports (rps, "d"))
2454 return "d";
2455 else
2456 return "c";
2457 case INSN_CLASS_F_OR_ZFINX:
2458 return "f' or `zfinx";
2459 case INSN_CLASS_D_OR_ZDINX:
2460 return "d' or `zdinx";
2461 case INSN_CLASS_Q_OR_ZQINX:
2462 return "q' or `zqinx";
2463 case INSN_CLASS_ZBA:
2464 return "zba";
2465 case INSN_CLASS_ZBB:
2466 return "zbb";
2467 case INSN_CLASS_ZBC:
2468 return "zbc";
2469 case INSN_CLASS_ZBS:
2470 return "zbs";
2471 case INSN_CLASS_ZBKB:
2472 return "zbkb";
2473 case INSN_CLASS_ZBKC:
2474 return "zbkc";
2475 case INSN_CLASS_ZBKX:
2476 return "zbkx";
2477 case INSN_CLASS_ZBB_OR_ZBKB:
2478 return "zbb' or `zbkb";
2479 case INSN_CLASS_ZBC_OR_ZBKC:
2480 return "zbc' or `zbkc";
2481 case INSN_CLASS_ZKND:
2482 return "zknd";
2483 case INSN_CLASS_ZKNE:
2484 return "zkne";
2485 case INSN_CLASS_ZKNH:
2486 return "zknh";
2487 case INSN_CLASS_ZKND_OR_ZKNE:
2488 return "zknd' or `zkne";
2489 case INSN_CLASS_ZKSED:
2490 return "zksed";
2491 case INSN_CLASS_ZKSH:
2492 return "zksh";
2493 case INSN_CLASS_V:
2494 return "v' or `zve64x' or `zve32x";
2495 case INSN_CLASS_ZVEF:
2496 return "v' or `zve64d' or `zve64f' or `zve32f";
2497 case INSN_CLASS_SVINVAL:
2498 return "svinval";
2499 default:
2500 rps->error_handler
2501 (_("internal: unreachable INSN_CLASS_*"));
2502 return NULL;
2503 }
2504 }