]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - bfd/elfxx-riscv.c
projects / thirdparty / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Update year range in copyright notice of binutils files
[thirdparty/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 "libiberty.h"
29 #include "elfxx-riscv.h"
30 #include "safe-ctype.h"
31
32 #define MINUS_ONE ((bfd_vma)0 - 1)
33
34 /* Special handler for ADD/SUB relocations that allows them to be filled out
35 both in the pre-linked and post-linked file. This is necessary to make
36 pre-linked debug info work, as due to linker relaxations we need to emit
37 relocations for the debug info. */
38 static bfd_reloc_status_type riscv_elf_add_sub_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40
41 /* The relocation table used for SHT_RELA sections. */
42
43 static reloc_howto_type howto_table[] =
44 {
45 /* No relocation. */
46 HOWTO (R_RISCV_NONE, /* type */
47 0, /* rightshift */
48 3, /* size */
49 0, /* bitsize */
50 FALSE, /* pc_relative */
51 0, /* bitpos */
52 complain_overflow_dont, /* complain_on_overflow */
53 bfd_elf_generic_reloc, /* special_function */
54 "R_RISCV_NONE", /* name */
55 FALSE, /* partial_inplace */
56 0, /* src_mask */
57 0, /* dst_mask */
58 FALSE), /* pcrel_offset */
59
60 /* 32 bit relocation. */
61 HOWTO (R_RISCV_32, /* type */
62 0, /* rightshift */
63 2, /* size */
64 32, /* bitsize */
65 FALSE, /* pc_relative */
66 0, /* bitpos */
67 complain_overflow_dont, /* complain_on_overflow */
68 bfd_elf_generic_reloc, /* special_function */
69 "R_RISCV_32", /* name */
70 FALSE, /* partial_inplace */
71 0, /* src_mask */
72 0xffffffff, /* dst_mask */
73 FALSE), /* pcrel_offset */
74
75 /* 64 bit relocation. */
76 HOWTO (R_RISCV_64, /* type */
77 0, /* rightshift */
78 4, /* size */
79 64, /* bitsize */
80 FALSE, /* pc_relative */
81 0, /* bitpos */
82 complain_overflow_dont, /* complain_on_overflow */
83 bfd_elf_generic_reloc, /* special_function */
84 "R_RISCV_64", /* name */
85 FALSE, /* partial_inplace */
86 0, /* src_mask */
87 MINUS_ONE, /* dst_mask */
88 FALSE), /* pcrel_offset */
89
90 /* Relocation against a local symbol in a shared object. */
91 HOWTO (R_RISCV_RELATIVE, /* type */
92 0, /* rightshift */
93 2, /* size */
94 32, /* bitsize */
95 FALSE, /* pc_relative */
96 0, /* bitpos */
97 complain_overflow_dont, /* complain_on_overflow */
98 bfd_elf_generic_reloc, /* special_function */
99 "R_RISCV_RELATIVE", /* name */
100 FALSE, /* partial_inplace */
101 0, /* src_mask */
102 0xffffffff, /* dst_mask */
103 FALSE), /* pcrel_offset */
104
105 HOWTO (R_RISCV_COPY, /* type */
106 0, /* rightshift */
107 0, /* this one is variable size */
108 0, /* bitsize */
109 FALSE, /* pc_relative */
110 0, /* bitpos */
111 complain_overflow_bitfield, /* complain_on_overflow */
112 bfd_elf_generic_reloc, /* special_function */
113 "R_RISCV_COPY", /* name */
114 FALSE, /* partial_inplace */
115 0, /* src_mask */
116 0, /* dst_mask */
117 FALSE), /* pcrel_offset */
118
119 HOWTO (R_RISCV_JUMP_SLOT, /* type */
120 0, /* rightshift */
121 4, /* size */
122 64, /* bitsize */
123 FALSE, /* pc_relative */
124 0, /* bitpos */
125 complain_overflow_bitfield, /* complain_on_overflow */
126 bfd_elf_generic_reloc, /* special_function */
127 "R_RISCV_JUMP_SLOT", /* name */
128 FALSE, /* partial_inplace */
129 0, /* src_mask */
130 0, /* dst_mask */
131 FALSE), /* pcrel_offset */
132
133 /* Dynamic TLS relocations. */
134 HOWTO (R_RISCV_TLS_DTPMOD32, /* type */
135 0, /* rightshift */
136 2, /* size */
137 32, /* bitsize */
138 FALSE, /* pc_relative */
139 0, /* bitpos */
140 complain_overflow_dont, /* complain_on_overflow */
141 bfd_elf_generic_reloc, /* special_function */
142 "R_RISCV_TLS_DTPMOD32", /* name */
143 FALSE, /* partial_inplace */
144 0, /* src_mask */
145 0xffffffff, /* dst_mask */
146 FALSE), /* pcrel_offset */
147
148 HOWTO (R_RISCV_TLS_DTPMOD64, /* type */
149 0, /* rightshift */
150 4, /* size */
151 64, /* bitsize */
152 FALSE, /* pc_relative */
153 0, /* bitpos */
154 complain_overflow_dont, /* complain_on_overflow */
155 bfd_elf_generic_reloc, /* special_function */
156 "R_RISCV_TLS_DTPMOD64", /* name */
157 FALSE, /* partial_inplace */
158 0, /* src_mask */
159 MINUS_ONE, /* dst_mask */
160 FALSE), /* pcrel_offset */
161
162 HOWTO (R_RISCV_TLS_DTPREL32, /* type */
163 0, /* rightshift */
164 2, /* size */
165 32, /* bitsize */
166 FALSE, /* pc_relative */
167 0, /* bitpos */
168 complain_overflow_dont, /* complain_on_overflow */
169 bfd_elf_generic_reloc, /* special_function */
170 "R_RISCV_TLS_DTPREL32", /* name */
171 TRUE, /* partial_inplace */
172 0, /* src_mask */
173 0xffffffff, /* dst_mask */
174 FALSE), /* pcrel_offset */
175
176 HOWTO (R_RISCV_TLS_DTPREL64, /* type */
177 0, /* rightshift */
178 4, /* size */
179 64, /* bitsize */
180 FALSE, /* pc_relative */
181 0, /* bitpos */
182 complain_overflow_dont, /* complain_on_overflow */
183 bfd_elf_generic_reloc, /* special_function */
184 "R_RISCV_TLS_DTPREL64", /* name */
185 TRUE, /* partial_inplace */
186 0, /* src_mask */
187 MINUS_ONE, /* dst_mask */
188 FALSE), /* pcrel_offset */
189
190 HOWTO (R_RISCV_TLS_TPREL32, /* type */
191 0, /* rightshift */
192 2, /* size */
193 32, /* bitsize */
194 FALSE, /* pc_relative */
195 0, /* bitpos */
196 complain_overflow_dont, /* complain_on_overflow */
197 bfd_elf_generic_reloc, /* special_function */
198 "R_RISCV_TLS_TPREL32", /* name */
199 FALSE, /* partial_inplace */
200 0, /* src_mask */
201 0xffffffff, /* dst_mask */
202 FALSE), /* pcrel_offset */
203
204 HOWTO (R_RISCV_TLS_TPREL64, /* type */
205 0, /* rightshift */
206 4, /* size */
207 64, /* bitsize */
208 FALSE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_dont, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_RISCV_TLS_TPREL64", /* name */
213 FALSE, /* partial_inplace */
214 0, /* src_mask */
215 MINUS_ONE, /* dst_mask */
216 FALSE), /* pcrel_offset */
217
218 /* Reserved for future relocs that the dynamic linker must understand. */
219 EMPTY_HOWTO (12),
220 EMPTY_HOWTO (13),
221 EMPTY_HOWTO (14),
222 EMPTY_HOWTO (15),
223
224 /* 12-bit PC-relative branch offset. */
225 HOWTO (R_RISCV_BRANCH, /* type */
226 0, /* rightshift */
227 2, /* size */
228 32, /* bitsize */
229 TRUE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_signed, /* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_RISCV_BRANCH", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 ENCODE_SBTYPE_IMM (-1U), /* dst_mask */
237 TRUE), /* pcrel_offset */
238
239 /* 20-bit PC-relative jump offset. */
240 HOWTO (R_RISCV_JAL, /* type */
241 0, /* rightshift */
242 2, /* size */
243 32, /* bitsize */
244 TRUE, /* pc_relative */
245 0, /* bitpos */
246 complain_overflow_dont, /* complain_on_overflow */
247 bfd_elf_generic_reloc, /* special_function */
248 "R_RISCV_JAL", /* name */
249 FALSE, /* partial_inplace */
250 0, /* src_mask */
251 ENCODE_UJTYPE_IMM (-1U), /* dst_mask */
252 TRUE), /* pcrel_offset */
253
254 /* 32-bit PC-relative function call (AUIPC/JALR). */
255 HOWTO (R_RISCV_CALL, /* type */
256 0, /* rightshift */
257 4, /* size */
258 64, /* bitsize */
259 TRUE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 bfd_elf_generic_reloc, /* special_function */
263 "R_RISCV_CALL", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
267 /* dst_mask */
268 TRUE), /* pcrel_offset */
269
270 /* Like R_RISCV_CALL, but not locally binding. */
271 HOWTO (R_RISCV_CALL_PLT, /* type */
272 0, /* rightshift */
273 4, /* size */
274 64, /* bitsize */
275 TRUE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_RISCV_CALL_PLT", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma) ENCODE_ITYPE_IMM (-1U) << 32),
283 /* dst_mask */
284 TRUE), /* pcrel_offset */
285
286 /* High 20 bits of 32-bit PC-relative GOT access. */
287 HOWTO (R_RISCV_GOT_HI20, /* type */
288 0, /* rightshift */
289 2, /* size */
290 32, /* bitsize */
291 TRUE, /* pc_relative */
292 0, /* bitpos */
293 complain_overflow_dont, /* complain_on_overflow */
294 bfd_elf_generic_reloc, /* special_function */
295 "R_RISCV_GOT_HI20", /* name */
296 FALSE, /* partial_inplace */
297 0, /* src_mask */
298 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
299 FALSE), /* pcrel_offset */
300
301 /* High 20 bits of 32-bit PC-relative TLS IE GOT access. */
302 HOWTO (R_RISCV_TLS_GOT_HI20, /* type */
303 0, /* rightshift */
304 2, /* size */
305 32, /* bitsize */
306 TRUE, /* pc_relative */
307 0, /* bitpos */
308 complain_overflow_dont, /* complain_on_overflow */
309 bfd_elf_generic_reloc, /* special_function */
310 "R_RISCV_TLS_GOT_HI20", /* name */
311 FALSE, /* partial_inplace */
312 0, /* src_mask */
313 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
314 FALSE), /* pcrel_offset */
315
316 /* High 20 bits of 32-bit PC-relative TLS GD GOT reference. */
317 HOWTO (R_RISCV_TLS_GD_HI20, /* type */
318 0, /* rightshift */
319 2, /* size */
320 32, /* bitsize */
321 TRUE, /* pc_relative */
322 0, /* bitpos */
323 complain_overflow_dont, /* complain_on_overflow */
324 bfd_elf_generic_reloc, /* special_function */
325 "R_RISCV_TLS_GD_HI20", /* name */
326 FALSE, /* partial_inplace */
327 0, /* src_mask */
328 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
329 FALSE), /* pcrel_offset */
330
331 /* High 20 bits of 32-bit PC-relative reference. */
332 HOWTO (R_RISCV_PCREL_HI20, /* type */
333 0, /* rightshift */
334 2, /* size */
335 32, /* bitsize */
336 TRUE, /* pc_relative */
337 0, /* bitpos */
338 complain_overflow_dont, /* complain_on_overflow */
339 bfd_elf_generic_reloc, /* special_function */
340 "R_RISCV_PCREL_HI20", /* name */
341 FALSE, /* partial_inplace */
342 0, /* src_mask */
343 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
344 TRUE), /* pcrel_offset */
345
346 /* Low 12 bits of a 32-bit PC-relative load or add. */
347 HOWTO (R_RISCV_PCREL_LO12_I, /* type */
348 0, /* rightshift */
349 2, /* size */
350 32, /* bitsize */
351 FALSE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_dont, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* special_function */
355 "R_RISCV_PCREL_LO12_I", /* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
359 FALSE), /* pcrel_offset */
360
361 /* Low 12 bits of a 32-bit PC-relative store. */
362 HOWTO (R_RISCV_PCREL_LO12_S, /* type */
363 0, /* rightshift */
364 2, /* size */
365 32, /* bitsize */
366 FALSE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_dont, /* complain_on_overflow */
369 bfd_elf_generic_reloc, /* special_function */
370 "R_RISCV_PCREL_LO12_S", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 ENCODE_STYPE_IMM (-1U), /* dst_mask */
374 FALSE), /* pcrel_offset */
375
376 /* High 20 bits of 32-bit absolute address. */
377 HOWTO (R_RISCV_HI20, /* type */
378 0, /* rightshift */
379 2, /* size */
380 32, /* bitsize */
381 FALSE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_dont, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_RISCV_HI20", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
389 FALSE), /* pcrel_offset */
390
391 /* High 12 bits of 32-bit load or add. */
392 HOWTO (R_RISCV_LO12_I, /* type */
393 0, /* rightshift */
394 2, /* size */
395 32, /* bitsize */
396 FALSE, /* pc_relative */
397 0, /* bitpos */
398 complain_overflow_dont, /* complain_on_overflow */
399 bfd_elf_generic_reloc, /* special_function */
400 "R_RISCV_LO12_I", /* name */
401 FALSE, /* partial_inplace */
402 0, /* src_mask */
403 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
404 FALSE), /* pcrel_offset */
405
406 /* High 12 bits of 32-bit store. */
407 HOWTO (R_RISCV_LO12_S, /* type */
408 0, /* rightshift */
409 2, /* size */
410 32, /* bitsize */
411 FALSE, /* pc_relative */
412 0, /* bitpos */
413 complain_overflow_dont, /* complain_on_overflow */
414 bfd_elf_generic_reloc, /* special_function */
415 "R_RISCV_LO12_S", /* name */
416 FALSE, /* partial_inplace */
417 0, /* src_mask */
418 ENCODE_STYPE_IMM (-1U), /* dst_mask */
419 FALSE), /* pcrel_offset */
420
421 /* High 20 bits of TLS LE thread pointer offset. */
422 HOWTO (R_RISCV_TPREL_HI20, /* type */
423 0, /* rightshift */
424 2, /* size */
425 32, /* bitsize */
426 FALSE, /* pc_relative */
427 0, /* bitpos */
428 complain_overflow_signed, /* complain_on_overflow */
429 bfd_elf_generic_reloc, /* special_function */
430 "R_RISCV_TPREL_HI20", /* name */
431 TRUE, /* partial_inplace */
432 0, /* src_mask */
433 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
434 FALSE), /* pcrel_offset */
435
436 /* Low 12 bits of TLS LE thread pointer offset for loads and adds. */
437 HOWTO (R_RISCV_TPREL_LO12_I, /* type */
438 0, /* rightshift */
439 2, /* size */
440 32, /* bitsize */
441 FALSE, /* pc_relative */
442 0, /* bitpos */
443 complain_overflow_signed, /* complain_on_overflow */
444 bfd_elf_generic_reloc, /* special_function */
445 "R_RISCV_TPREL_LO12_I", /* name */
446 FALSE, /* partial_inplace */
447 0, /* src_mask */
448 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
449 FALSE), /* pcrel_offset */
450
451 /* Low 12 bits of TLS LE thread pointer offset for stores. */
452 HOWTO (R_RISCV_TPREL_LO12_S, /* type */
453 0, /* rightshift */
454 2, /* size */
455 32, /* bitsize */
456 FALSE, /* pc_relative */
457 0, /* bitpos */
458 complain_overflow_signed, /* complain_on_overflow */
459 bfd_elf_generic_reloc, /* special_function */
460 "R_RISCV_TPREL_LO12_S", /* name */
461 FALSE, /* partial_inplace */
462 0, /* src_mask */
463 ENCODE_STYPE_IMM (-1U), /* dst_mask */
464 FALSE), /* pcrel_offset */
465
466 /* TLS LE thread pointer usage. May be relaxed. */
467 HOWTO (R_RISCV_TPREL_ADD, /* type */
468 0, /* rightshift */
469 3, /* size */
470 0, /* bitsize */
471 FALSE, /* pc_relative */
472 0, /* bitpos */
473 complain_overflow_dont, /* complain_on_overflow */
474 bfd_elf_generic_reloc, /* special_function */
475 "R_RISCV_TPREL_ADD", /* name */
476 FALSE, /* partial_inplace */
477 0, /* src_mask */
478 0, /* dst_mask */
479 FALSE), /* pcrel_offset */
480
481 /* 8-bit in-place addition, for local label subtraction. */
482 HOWTO (R_RISCV_ADD8, /* type */
483 0, /* rightshift */
484 0, /* size */
485 8, /* bitsize */
486 FALSE, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_dont, /* complain_on_overflow */
489 riscv_elf_add_sub_reloc, /* special_function */
490 "R_RISCV_ADD8", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
493 0xff, /* dst_mask */
494 FALSE), /* pcrel_offset */
495
496 /* 16-bit in-place addition, for local label subtraction. */
497 HOWTO (R_RISCV_ADD16, /* type */
498 0, /* rightshift */
499 1, /* size */
500 16, /* bitsize */
501 FALSE, /* pc_relative */
502 0, /* bitpos */
503 complain_overflow_dont, /* complain_on_overflow */
504 riscv_elf_add_sub_reloc, /* special_function */
505 "R_RISCV_ADD16", /* name */
506 FALSE, /* partial_inplace */
507 0, /* src_mask */
508 0xffff, /* dst_mask */
509 FALSE), /* pcrel_offset */
510
511 /* 32-bit in-place addition, for local label subtraction. */
512 HOWTO (R_RISCV_ADD32, /* type */
513 0, /* rightshift */
514 2, /* size */
515 32, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_dont, /* complain_on_overflow */
519 riscv_elf_add_sub_reloc, /* special_function */
520 "R_RISCV_ADD32", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffffffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* 64-bit in-place addition, for local label subtraction. */
527 HOWTO (R_RISCV_ADD64, /* type */
528 0, /* rightshift */
529 4, /* size */
530 64, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_dont, /* complain_on_overflow */
534 riscv_elf_add_sub_reloc, /* special_function */
535 "R_RISCV_ADD64", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 MINUS_ONE, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* 8-bit in-place addition, for local label subtraction. */
542 HOWTO (R_RISCV_SUB8, /* type */
543 0, /* rightshift */
544 0, /* size */
545 8, /* bitsize */
546 FALSE, /* pc_relative */
547 0, /* bitpos */
548 complain_overflow_dont, /* complain_on_overflow */
549 riscv_elf_add_sub_reloc, /* special_function */
550 "R_RISCV_SUB8", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
553 0xff, /* dst_mask */
554 FALSE), /* pcrel_offset */
555
556 /* 16-bit in-place addition, for local label subtraction. */
557 HOWTO (R_RISCV_SUB16, /* type */
558 0, /* rightshift */
559 1, /* size */
560 16, /* bitsize */
561 FALSE, /* pc_relative */
562 0, /* bitpos */
563 complain_overflow_dont, /* complain_on_overflow */
564 riscv_elf_add_sub_reloc, /* special_function */
565 "R_RISCV_SUB16", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
568 0xffff, /* dst_mask */
569 FALSE), /* pcrel_offset */
570
571 /* 32-bit in-place addition, for local label subtraction. */
572 HOWTO (R_RISCV_SUB32, /* type */
573 0, /* rightshift */
574 2, /* size */
575 32, /* bitsize */
576 FALSE, /* pc_relative */
577 0, /* bitpos */
578 complain_overflow_dont, /* complain_on_overflow */
579 riscv_elf_add_sub_reloc, /* special_function */
580 "R_RISCV_SUB32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
583 0xffffffff, /* dst_mask */
584 FALSE), /* pcrel_offset */
585
586 /* 64-bit in-place addition, for local label subtraction. */
587 HOWTO (R_RISCV_SUB64, /* type */
588 0, /* rightshift */
589 4, /* size */
590 64, /* bitsize */
591 FALSE, /* pc_relative */
592 0, /* bitpos */
593 complain_overflow_dont, /* complain_on_overflow */
594 riscv_elf_add_sub_reloc, /* special_function */
595 "R_RISCV_SUB64", /* name */
596 FALSE, /* partial_inplace */
597 0, /* src_mask */
598 MINUS_ONE, /* dst_mask */
599 FALSE), /* pcrel_offset */
600
601 /* GNU extension to record C++ vtable hierarchy */
602 HOWTO (R_RISCV_GNU_VTINHERIT, /* type */
603 0, /* rightshift */
604 4, /* size */
605 0, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_dont, /* complain_on_overflow */
609 NULL, /* special_function */
610 "R_RISCV_GNU_VTINHERIT", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* GNU extension to record C++ vtable member usage */
617 HOWTO (R_RISCV_GNU_VTENTRY, /* type */
618 0, /* rightshift */
619 4, /* size */
620 0, /* bitsize */
621 FALSE, /* pc_relative */
622 0, /* bitpos */
623 complain_overflow_dont, /* complain_on_overflow */
624 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
625 "R_RISCV_GNU_VTENTRY", /* name */
626 FALSE, /* partial_inplace */
627 0, /* src_mask */
628 0, /* dst_mask */
629 FALSE), /* pcrel_offset */
630
631 /* Indicates an alignment statement. The addend field encodes how many
632 bytes of NOPs follow the statement. The desired alignment is the
633 addend rounded up to the next power of two. */
634 HOWTO (R_RISCV_ALIGN, /* type */
635 0, /* rightshift */
636 3, /* size */
637 0, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_RISCV_ALIGN", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* 8-bit PC-relative branch offset. */
649 HOWTO (R_RISCV_RVC_BRANCH, /* type */
650 0, /* rightshift */
651 1, /* size */
652 16, /* bitsize */
653 TRUE, /* pc_relative */
654 0, /* bitpos */
655 complain_overflow_signed, /* complain_on_overflow */
656 bfd_elf_generic_reloc, /* special_function */
657 "R_RISCV_RVC_BRANCH", /* name */
658 FALSE, /* partial_inplace */
659 0, /* src_mask */
660 ENCODE_RVC_B_IMM (-1U), /* dst_mask */
661 TRUE), /* pcrel_offset */
662
663 /* 11-bit PC-relative jump offset. */
664 HOWTO (R_RISCV_RVC_JUMP, /* type */
665 0, /* rightshift */
666 1, /* size */
667 16, /* bitsize */
668 TRUE, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_dont, /* complain_on_overflow */
671 bfd_elf_generic_reloc, /* special_function */
672 "R_RISCV_RVC_JUMP", /* name */
673 FALSE, /* partial_inplace */
674 0, /* src_mask */
675 ENCODE_RVC_J_IMM (-1U), /* dst_mask */
676 TRUE), /* pcrel_offset */
677
678 /* High 6 bits of 18-bit absolute address. */
679 HOWTO (R_RISCV_RVC_LUI, /* type */
680 0, /* rightshift */
681 1, /* size */
682 16, /* bitsize */
683 FALSE, /* pc_relative */
684 0, /* bitpos */
685 complain_overflow_dont, /* complain_on_overflow */
686 bfd_elf_generic_reloc, /* special_function */
687 "R_RISCV_RVC_LUI", /* name */
688 FALSE, /* partial_inplace */
689 0, /* src_mask */
690 ENCODE_RVC_IMM (-1U), /* dst_mask */
691 FALSE), /* pcrel_offset */
692
693 /* GP-relative load. */
694 HOWTO (R_RISCV_GPREL_I, /* type */
695 0, /* rightshift */
696 2, /* size */
697 32, /* bitsize */
698 FALSE, /* pc_relative */
699 0, /* bitpos */
700 complain_overflow_dont, /* complain_on_overflow */
701 bfd_elf_generic_reloc, /* special_function */
702 "R_RISCV_GPREL_I", /* name */
703 FALSE, /* partial_inplace */
704 0, /* src_mask */
705 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
706 FALSE), /* pcrel_offset */
707
708 /* GP-relative store. */
709 HOWTO (R_RISCV_GPREL_S, /* type */
710 0, /* rightshift */
711 2, /* size */
712 32, /* bitsize */
713 FALSE, /* pc_relative */
714 0, /* bitpos */
715 complain_overflow_dont, /* complain_on_overflow */
716 bfd_elf_generic_reloc, /* special_function */
717 "R_RISCV_GPREL_S", /* name */
718 FALSE, /* partial_inplace */
719 0, /* src_mask */
720 ENCODE_STYPE_IMM (-1U), /* dst_mask */
721 FALSE), /* pcrel_offset */
722
723 /* TP-relative TLS LE load. */
724 HOWTO (R_RISCV_TPREL_I, /* type */
725 0, /* rightshift */
726 2, /* size */
727 32, /* bitsize */
728 FALSE, /* pc_relative */
729 0, /* bitpos */
730 complain_overflow_signed, /* complain_on_overflow */
731 bfd_elf_generic_reloc, /* special_function */
732 "R_RISCV_TPREL_I", /* name */
733 FALSE, /* partial_inplace */
734 0, /* src_mask */
735 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
736 FALSE), /* pcrel_offset */
737
738 /* TP-relative TLS LE store. */
739 HOWTO (R_RISCV_TPREL_S, /* type */
740 0, /* rightshift */
741 2, /* size */
742 32, /* bitsize */
743 FALSE, /* pc_relative */
744 0, /* bitpos */
745 complain_overflow_signed, /* complain_on_overflow */
746 bfd_elf_generic_reloc, /* special_function */
747 "R_RISCV_TPREL_S", /* name */
748 FALSE, /* partial_inplace */
749 0, /* src_mask */
750 ENCODE_STYPE_IMM (-1U), /* dst_mask */
751 FALSE), /* pcrel_offset */
752
753 /* The paired relocation may be relaxed. */
754 HOWTO (R_RISCV_RELAX, /* type */
755 0, /* rightshift */
756 3, /* size */
757 0, /* bitsize */
758 FALSE, /* pc_relative */
759 0, /* bitpos */
760 complain_overflow_dont, /* complain_on_overflow */
761 bfd_elf_generic_reloc, /* special_function */
762 "R_RISCV_RELAX", /* name */
763 FALSE, /* partial_inplace */
764 0, /* src_mask */
765 0, /* dst_mask */
766 FALSE), /* pcrel_offset */
767
768 /* 6-bit in-place addition, for local label subtraction. */
769 HOWTO (R_RISCV_SUB6, /* type */
770 0, /* rightshift */
771 0, /* size */
772 8, /* bitsize */
773 FALSE, /* pc_relative */
774 0, /* bitpos */
775 complain_overflow_dont, /* complain_on_overflow */
776 riscv_elf_add_sub_reloc, /* special_function */
777 "R_RISCV_SUB6", /* name */
778 FALSE, /* partial_inplace */
779 0, /* src_mask */
780 0x3f, /* dst_mask */
781 FALSE), /* pcrel_offset */
782
783 /* 6-bit in-place setting, for local label subtraction. */
784 HOWTO (R_RISCV_SET6, /* type */
785 0, /* rightshift */
786 0, /* size */
787 8, /* bitsize */
788 FALSE, /* pc_relative */
789 0, /* bitpos */
790 complain_overflow_dont, /* complain_on_overflow */
791 bfd_elf_generic_reloc, /* special_function */
792 "R_RISCV_SET6", /* name */
793 FALSE, /* partial_inplace */
794 0, /* src_mask */
795 0x3f, /* dst_mask */
796 FALSE), /* pcrel_offset */
797
798 /* 8-bit in-place setting, for local label subtraction. */
799 HOWTO (R_RISCV_SET8, /* type */
800 0, /* rightshift */
801 0, /* size */
802 8, /* bitsize */
803 FALSE, /* pc_relative */
804 0, /* bitpos */
805 complain_overflow_dont, /* complain_on_overflow */
806 bfd_elf_generic_reloc, /* special_function */
807 "R_RISCV_SET8", /* name */
808 FALSE, /* partial_inplace */
809 0, /* src_mask */
810 0xff, /* dst_mask */
811 FALSE), /* pcrel_offset */
812
813 /* 16-bit in-place setting, for local label subtraction. */
814 HOWTO (R_RISCV_SET16, /* type */
815 0, /* rightshift */
816 1, /* size */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 bfd_elf_generic_reloc, /* special_function */
822 "R_RISCV_SET16", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* 32-bit in-place setting, for local label subtraction. */
829 HOWTO (R_RISCV_SET32, /* type */
830 0, /* rightshift */
831 2, /* size */
832 32, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 bfd_elf_generic_reloc, /* special_function */
837 "R_RISCV_SET32", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffffffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* 32-bit PC relative. */
844 HOWTO (R_RISCV_32_PCREL, /* type */
845 0, /* rightshift */
846 2, /* size */
847 32, /* bitsize */
848 TRUE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 bfd_elf_generic_reloc, /* special_function */
852 "R_RISCV_32_PCREL", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffffffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* Relocation against a local ifunc symbol in a shared object. */
859 HOWTO (R_RISCV_IRELATIVE, /* type */
860 0, /* rightshift */
861 2, /* size */
862 32, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 bfd_elf_generic_reloc, /* special_function */
867 "R_RISCV_IRELATIVE", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffffffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872 };
873
874 /* A mapping from BFD reloc types to RISC-V ELF reloc types. */
875
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 bfd_vma old_value = bfd_get (howto->bitsize, abfd,
1005 data + reloc_entry->address);
1006
1007 switch (howto->type)
1008 {
1009 case R_RISCV_ADD8:
1010 case R_RISCV_ADD16:
1011 case R_RISCV_ADD32:
1012 case R_RISCV_ADD64:
1013 relocation = old_value + relocation;
1014 break;
1015 case R_RISCV_SUB6:
1016 case R_RISCV_SUB8:
1017 case R_RISCV_SUB16:
1018 case R_RISCV_SUB32:
1019 case R_RISCV_SUB64:
1020 relocation = old_value - relocation;
1021 break;
1022 }
1023 bfd_put (howto->bitsize, abfd, relocation, data + reloc_entry->address);
1024
1025 return bfd_reloc_ok;
1026 }
1027
1028 /* Array is used to compare the all extensions' order quickly.
1029
1030 Zero number means it is a preserved keyword.
1031 Negative number means it is a prefix keyword (s, h, x, z).
1032 Positive number means it is a standard extension. */
1033
1034 static int riscv_ext_order[26] = {0};
1035
1036 /* Similar to the strcmp. It returns an integer less than, equal to,
1037 or greater than zero if `subset2` is found, respectively, to be less
1038 than, to match, or be greater than `subset1`. */
1039
1040 static int
1041 riscv_compare_subsets (const char *subset1, const char *subset2)
1042 {
1043 int order1 = riscv_ext_order[(*subset1 - 'a')];
1044 int order2 = riscv_ext_order[(*subset2 - 'a')];
1045
1046 /* Compare the standard extension first. */
1047 if (order1 > 0 && order2 > 0)
1048 return order1 - order2;
1049
1050 if (order1 == order2 && order1 < 0)
1051 {
1052 /* Compare the standard addition z extensions. */
1053 if (*subset1 == 'z')
1054 {
1055 order1 = riscv_ext_order[(*++subset1 - 'a')];
1056 order2 = riscv_ext_order[(*++subset2 - 'a')];
1057 if (order1 != order2)
1058 return order1 - order2;
1059 }
1060 return strcasecmp (++subset1, ++subset2);
1061 }
1062
1063 return order2 - order1;
1064 }
1065
1066 /* Find subset in the list. Return TRUE and set `current` to the subset
1067 if it is found. Otherwise, return FALSE and set `current` to the place
1068 where we should insert the subset. However, return FALSE with the NULL
1069 `current` means we should insert the subset at the head of subset list,
1070 if needed. */
1071
1072 bfd_boolean
1073 riscv_lookup_subset (const riscv_subset_list_t *subset_list,
1074 const char *subset,
1075 riscv_subset_t **current)
1076 {
1077 riscv_subset_t *s, *pre_s = NULL;
1078
1079 for (s = subset_list->head;
1080 s != NULL;
1081 pre_s = s, s = s->next)
1082 {
1083 int cmp = riscv_compare_subsets (s->name, subset);
1084 if (cmp == 0)
1085 {
1086 *current = s;
1087 return TRUE;
1088 }
1089 else if (cmp > 0)
1090 break;
1091 }
1092 *current = pre_s;
1093 return FALSE;
1094 }
1095
1096 /* Add arch string extension to the last of the subset list. */
1097
1098 void
1099 riscv_add_subset (riscv_subset_list_t *subset_list,
1100 const char *subset,
1101 int major,
1102 int minor)
1103 {
1104 riscv_subset_t *s = xmalloc (sizeof *s);
1105
1106 if (subset_list->head == NULL)
1107 subset_list->head = s;
1108
1109 s->name = xstrdup (subset);
1110 s->major_version = major;
1111 s->minor_version = minor;
1112 s->next = NULL;
1113
1114 if (subset_list->tail != NULL)
1115 subset_list->tail->next = s;
1116 subset_list->tail = s;
1117 }
1118
1119 /* Add the implicit extension to the subset list. Search the
1120 list first, and then find the right place to add. */
1121
1122 static void
1123 riscv_add_implicit_subset (riscv_subset_list_t *subset_list,
1124 const char *subset,
1125 int major,
1126 int minor)
1127 {
1128 riscv_subset_t *current, *new;
1129
1130 if (riscv_lookup_subset (subset_list, subset, &current))
1131 return;
1132
1133 new = xmalloc (sizeof *new);
1134 new->name = xstrdup (subset);
1135 new->major_version = major;
1136 new->minor_version = minor;
1137 new->next = NULL;
1138
1139 if (current != NULL)
1140 {
1141 new->next = current->next;
1142 current->next = new;
1143 }
1144 else
1145 {
1146 new->next = subset_list->head;
1147 subset_list->head = new;
1148 }
1149 }
1150
1151 /* These extensions are added to the subset list for special purposes,
1152 with the explicit versions or the RISCV_UNKNOWN_VERSION versions.
1153 Therefore, we won't output them to the output arch string in the
1154 riscv_arch_str1, if the versions are unknown. */
1155
1156 static bfd_boolean
1157 riscv_ext_dont_care_version (const char *subset)
1158 {
1159 if (strcmp (subset, "g") == 0
1160 || strcmp (subset, "zicsr") == 0
1161 || strcmp (subset, "zifencei") == 0)
1162 return TRUE;
1163 return FALSE;
1164 }
1165
1166 /* We have to add all arch string extensions first, and then start to
1167 add their implicit extensions. The arch string extensions must be
1168 set in order, so we can add them to the last of the subset list
1169 directly, without searching.
1170
1171 Find the default versions for the extension before adding them to
1172 the subset list, if their versions are RISCV_UNKNOWN_VERSION.
1173 Afterwards, report errors if we can not find their default versions. */
1174
1175 static void
1176 riscv_parse_add_subset (riscv_parse_subset_t *rps,
1177 const char *subset,
1178 int major,
1179 int minor,
1180 bfd_boolean implicit)
1181 {
1182 int major_version = major;
1183 int minor_version = minor;
1184
1185 if ((major_version == RISCV_UNKNOWN_VERSION
1186 || minor_version == RISCV_UNKNOWN_VERSION)
1187 && rps->get_default_version != NULL)
1188 rps->get_default_version (subset, &major_version, &minor_version);
1189
1190 if (!riscv_ext_dont_care_version (subset)
1191 && (major_version == RISCV_UNKNOWN_VERSION
1192 || minor_version == RISCV_UNKNOWN_VERSION))
1193 {
1194 /* We only add the implicit extension if it is supported in the
1195 chosen ISA spec. */
1196 if (implicit)
1197 return;
1198
1199 if (subset[0] == 'x')
1200 rps->error_handler
1201 (_("x ISA extension `%s' must be set with the versions"),
1202 subset);
1203 else
1204 rps->error_handler
1205 (_("cannot find default versions of the ISA extension `%s'"),
1206 subset);
1207 return;
1208 }
1209
1210 if (!implicit)
1211 riscv_add_subset (rps->subset_list, subset,
1212 major_version, minor_version);
1213 else
1214 riscv_add_implicit_subset (rps->subset_list, subset,
1215 major_version, minor_version);
1216 }
1217
1218 /* Release subset list. */
1219
1220 void
1221 riscv_release_subset_list (riscv_subset_list_t *subset_list)
1222 {
1223 while (subset_list->head != NULL)
1224 {
1225 riscv_subset_t *next = subset_list->head->next;
1226 free ((void *)subset_list->head->name);
1227 free (subset_list->head);
1228 subset_list->head = next;
1229 }
1230
1231 subset_list->tail = NULL;
1232 }
1233
1234 /* Parsing extension version.
1235
1236 Return Value:
1237 Points to the end of version
1238
1239 Arguments:
1240 `rps`: Hooks and status for parsing extensions.
1241 `march`: Full arch string.
1242 `p`: Curent parsing position.
1243 `major_version`: Parsed major version.
1244 `minor_version`: Parsed minor version.
1245 `std_ext_p`: True if parsing standard extension. */
1246
1247 static const char *
1248 riscv_parsing_subset_version (riscv_parse_subset_t *rps,
1249 const char *march,
1250 const char *p,
1251 int *major_version,
1252 int *minor_version,
1253 bfd_boolean std_ext_p)
1254 {
1255 bfd_boolean major_p = TRUE;
1256 int version = 0;
1257 char np;
1258
1259 *major_version = 0;
1260 *minor_version = 0;
1261 for (; *p; ++p)
1262 {
1263 if (*p == 'p')
1264 {
1265 np = *(p + 1);
1266
1267 if (!ISDIGIT (np))
1268 {
1269 /* Might be beginning of `p` extension. */
1270 if (std_ext_p)
1271 {
1272 *major_version = version;
1273 *minor_version = 0;
1274 return p;
1275 }
1276 else
1277 {
1278 rps->error_handler
1279 (_("-march=%s: expect number after `%dp'"),
1280 march, version);
1281 return NULL;
1282 }
1283 }
1284
1285 *major_version = version;
1286 major_p = FALSE;
1287 version = 0;
1288 }
1289 else if (ISDIGIT (*p))
1290 version = (version * 10) + (*p - '0');
1291 else
1292 break;
1293 }
1294
1295 if (major_p)
1296 *major_version = version;
1297 else
1298 *minor_version = version;
1299
1300 /* We can not find any version in string. */
1301 if (*major_version == 0 && *minor_version == 0)
1302 {
1303 *major_version = RISCV_UNKNOWN_VERSION;
1304 *minor_version = RISCV_UNKNOWN_VERSION;
1305 }
1306
1307 return p;
1308 }
1309
1310 /* Return string which contain all supported standard extensions in
1311 canonical order. */
1312
1313 const char *
1314 riscv_supported_std_ext (void)
1315 {
1316 return "mafdqlcbjtpvn";
1317 }
1318
1319 /* Parsing function for standard extensions.
1320
1321 Return Value:
1322 Points to the end of extensions.
1323
1324 Arguments:
1325 `rps`: Hooks and status for parsing extensions.
1326 `march`: Full arch string.
1327 `p`: Curent parsing position. */
1328
1329 static const char *
1330 riscv_parse_std_ext (riscv_parse_subset_t *rps,
1331 const char *march,
1332 const char *p)
1333 {
1334 const char *all_std_exts = riscv_supported_std_ext ();
1335 const char *std_exts = all_std_exts;
1336 int major_version;
1337 int minor_version;
1338 char subset[2] = {0, 0};
1339
1340 /* First letter must start with i, e or g. */
1341 switch (*p)
1342 {
1343 case 'i':
1344 p = riscv_parsing_subset_version (rps, march, ++p,
1345 &major_version,
1346 &minor_version, TRUE);
1347 riscv_parse_add_subset (rps, "i",
1348 major_version,
1349 minor_version, FALSE);
1350 break;
1351
1352 case 'e':
1353 p = riscv_parsing_subset_version (rps, march, ++p,
1354 &major_version,
1355 &minor_version, TRUE);
1356 riscv_parse_add_subset (rps, "e",
1357 major_version,
1358 minor_version, FALSE);
1359 /* i-ext must be enabled. */
1360 riscv_parse_add_subset (rps, "i",
1361 RISCV_UNKNOWN_VERSION,
1362 RISCV_UNKNOWN_VERSION, FALSE);
1363
1364 if (*rps->xlen > 32)
1365 {
1366 rps->error_handler
1367 (_("-march=%s: rv%de is not a valid base ISA"),
1368 march, *rps->xlen);
1369 return NULL;
1370 }
1371 break;
1372
1373 case 'g':
1374 p = riscv_parsing_subset_version (rps, march, ++p,
1375 &major_version,
1376 &minor_version, TRUE);
1377 /* i-ext must be enabled. */
1378 riscv_parse_add_subset (rps, "i",
1379 RISCV_UNKNOWN_VERSION,
1380 RISCV_UNKNOWN_VERSION, FALSE);
1381 /* g-ext is used to add the implicit extensions, but will
1382 not be output to the arch string. */
1383 riscv_parse_add_subset (rps, "g",
1384 major_version,
1385 minor_version, FALSE);
1386 for ( ; *std_exts != 'q'; std_exts++)
1387 {
1388 subset[0] = *std_exts;
1389 riscv_parse_add_subset (rps, subset,
1390 RISCV_UNKNOWN_VERSION,
1391 RISCV_UNKNOWN_VERSION, FALSE);
1392 }
1393 break;
1394
1395 default:
1396 rps->error_handler
1397 (_("-march=%s: first ISA extension must be `e', `i' or `g'"),
1398 march);
1399 return NULL;
1400 }
1401
1402 while (p != NULL && *p != '\0')
1403 {
1404 if (*p == 'x' || *p == 's' || *p == 'h' || *p == 'z')
1405 break;
1406
1407 if (*p == '_')
1408 {
1409 p++;
1410 continue;
1411 }
1412
1413 /* Checking canonical order. */
1414 char std_ext = *p;
1415 while (*std_exts && std_ext != *std_exts)
1416 std_exts++;
1417
1418 if (std_ext != *std_exts)
1419 {
1420 if (strchr (all_std_exts, std_ext) == NULL)
1421 rps->error_handler
1422 (_("-march=%s: unknown standard ISA extension `%c'"),
1423 march, std_ext);
1424 else
1425 rps->error_handler
1426 (_("-march=%s: standard ISA extension `%c' is not "
1427 "in canonical order"), march, std_ext);
1428 return NULL;
1429 }
1430
1431 std_exts++;
1432 subset[0] = std_ext;
1433 p = riscv_parsing_subset_version (rps, march, ++p,
1434 &major_version,
1435 &minor_version, TRUE);
1436 riscv_parse_add_subset (rps, subset,
1437 major_version,
1438 minor_version, FALSE);
1439 }
1440
1441 return p;
1442 }
1443
1444 /* Classify the argument 'arch' into one of riscv_isa_ext_class_t. */
1445
1446 riscv_isa_ext_class_t
1447 riscv_get_prefix_class (const char *arch)
1448 {
1449 switch (*arch)
1450 {
1451 case 's': return RV_ISA_CLASS_S;
1452 case 'h': return RV_ISA_CLASS_H;
1453 case 'x': return RV_ISA_CLASS_X;
1454 case 'z': return RV_ISA_CLASS_Z;
1455 default: return RV_ISA_CLASS_UNKNOWN;
1456 }
1457 }
1458
1459 /* Structure describing parameters to use when parsing a particular
1460 riscv_isa_ext_class_t. One of these should be provided for each
1461 possible class, except RV_ISA_CLASS_UNKNOWN. */
1462
1463 typedef struct riscv_parse_config
1464 {
1465 /* Class of the extension. */
1466 riscv_isa_ext_class_t class;
1467
1468 /* Prefix string for error printing and internal parser usage. */
1469 const char *prefix;
1470
1471 /* Predicate which is used for checking whether this is a "known"
1472 extension. For 'x', it always returns true since they are by
1473 definition non-standard and cannot be known. */
1474 bfd_boolean (*ext_valid_p) (const char *);
1475 } riscv_parse_config_t;
1476
1477 /* Parsing function for prefixed extensions.
1478
1479 Return Value:
1480 Points to the end of extension.
1481
1482 Arguments:
1483 `rps`: Hooks and status for parsing extensions.
1484 `march`: Full architecture string.
1485 `p`: Curent parsing position.
1486 `config`: What class and predicate function to use for the
1487 extension. */
1488
1489 static const char *
1490 riscv_parse_prefixed_ext (riscv_parse_subset_t *rps,
1491 const char *march,
1492 const char *p,
1493 const riscv_parse_config_t *config)
1494 {
1495 int major_version;
1496 int minor_version;
1497 const char *last_name;
1498 riscv_isa_ext_class_t class;
1499
1500 while (*p)
1501 {
1502 if (*p == '_')
1503 {
1504 p++;
1505 continue;
1506 }
1507
1508 /* Assert that the current extension specifier matches our parsing
1509 class. */
1510 class = riscv_get_prefix_class (p);
1511 if (class != config->class
1512 || class == RV_ISA_CLASS_UNKNOWN)
1513 break;
1514
1515 char *subset = xstrdup (p);
1516 char *q = subset;
1517 const char *end_of_version;
1518
1519 while (*++q != '\0' && *q != '_' && !ISDIGIT (*q))
1520 ;
1521
1522 end_of_version =
1523 riscv_parsing_subset_version (rps, march, q,
1524 &major_version,
1525 &minor_version, FALSE);
1526 *q = '\0';
1527
1528 if (end_of_version == NULL)
1529 {
1530 free (subset);
1531 return NULL;
1532 }
1533
1534 /* Check that the prefix extension is known.
1535 For 'x', anything goes but it cannot simply be 'x'.
1536 For 's', it must be known from a list and cannot simply be 's'.
1537 For 'h', it must be known from a list and cannot simply be 'h'.
1538 For 'z', it must be known from a list and cannot simply be 'z'. */
1539
1540 /* Check that the extension name is well-formed. */
1541 if (!config->ext_valid_p (subset))
1542 {
1543 rps->error_handler
1544 (_("-march=%s: unknown %s ISA extension `%s'"),
1545 march, config->prefix, subset);
1546 free (subset);
1547 return NULL;
1548 }
1549
1550 /* Check that the extension isn't duplicate. */
1551 last_name = rps->subset_list->tail->name;
1552 if (!strcasecmp (last_name, subset))
1553 {
1554 rps->error_handler
1555 (_("-march=%s: duplicate %s ISA extension `%s'"),
1556 march, config->prefix, subset);
1557 free (subset);
1558 return NULL;
1559 }
1560
1561 /* Check that the extension is in alphabetical order. */
1562 if (riscv_compare_subsets (last_name, subset) > 0)
1563 {
1564 rps->error_handler
1565 (_("-march=%s: %s ISA extension `%s' is not in alphabetical "
1566 "order. It must come before `%s'"),
1567 march, config->prefix, subset, last_name);
1568 free (subset);
1569 return NULL;
1570 }
1571
1572 riscv_parse_add_subset (rps, subset,
1573 major_version,
1574 minor_version, FALSE);
1575 free (subset);
1576 p += end_of_version - subset;
1577
1578 if (*p != '\0' && *p != '_')
1579 {
1580 rps->error_handler
1581 (_("-march=%s: %s ISA extension must separate with _"),
1582 march, config->prefix);
1583 return NULL;
1584 }
1585 }
1586
1587 return p;
1588 }
1589
1590 /* Lists of prefixed class extensions that binutils should know about.
1591 Whether or not a particular entry is in these lists will dictate if
1592 gas/ld will accept its presence in the architecture string.
1593
1594 Please add the extensions to the lists in lower case. However, keep
1595 these subsets in alphabetical order in these tables is recommended,
1596 although there is no impact on the current implementation. */
1597
1598 static const char * const riscv_std_z_ext_strtab[] =
1599 {
1600 "zicsr", "zifencei", NULL
1601 };
1602
1603 static const char * const riscv_std_s_ext_strtab[] =
1604 {
1605 NULL
1606 };
1607
1608 static const char * const riscv_std_h_ext_strtab[] =
1609 {
1610 NULL
1611 };
1612
1613 /* For the extension `ext`, search through the list of known extensions
1614 `known_exts` for a match, and return TRUE if found. */
1615
1616 static bfd_boolean
1617 riscv_multi_letter_ext_valid_p (const char *ext,
1618 const char *const *known_exts)
1619 {
1620 size_t i;
1621
1622 for (i = 0; known_exts[i]; ++i)
1623 if (!strcmp (ext, known_exts[i]))
1624 return TRUE;
1625
1626 return FALSE;
1627 }
1628
1629 /* Predicator function for x-prefixed extensions.
1630 Anything goes, except the literal 'x'. */
1631
1632 static bfd_boolean
1633 riscv_ext_x_valid_p (const char *arg)
1634 {
1635 if (!strcasecmp (arg, "x"))
1636 return FALSE;
1637
1638 return TRUE;
1639 }
1640
1641 /* Predicator functions for z-prefixed extensions.
1642 Only known z-extensions are permitted. */
1643
1644 static bfd_boolean
1645 riscv_ext_z_valid_p (const char *arg)
1646 {
1647 return riscv_multi_letter_ext_valid_p (arg, riscv_std_z_ext_strtab);
1648 }
1649
1650 /* Predicator function for 's' prefixed extensions.
1651 Only known s-extensions are permitted. */
1652
1653 static bfd_boolean
1654 riscv_ext_s_valid_p (const char *arg)
1655 {
1656 return riscv_multi_letter_ext_valid_p (arg, riscv_std_s_ext_strtab);
1657 }
1658
1659 /* Predicator function for 'h' prefixed extensions.
1660 Only known h-extensions are permitted. */
1661
1662 static bfd_boolean
1663 riscv_ext_h_valid_p (const char *arg)
1664 {
1665 return riscv_multi_letter_ext_valid_p (arg, riscv_std_h_ext_strtab);
1666 }
1667
1668 /* Parsing order of the prefixed extensions that is specified by
1669 the ISA spec. */
1670
1671 static const riscv_parse_config_t parse_config[] =
1672 {
1673 {RV_ISA_CLASS_S, "s", riscv_ext_s_valid_p},
1674 {RV_ISA_CLASS_H, "h", riscv_ext_h_valid_p},
1675 {RV_ISA_CLASS_Z, "z", riscv_ext_z_valid_p},
1676 {RV_ISA_CLASS_X, "x", riscv_ext_x_valid_p},
1677 {RV_ISA_CLASS_UNKNOWN, NULL, NULL}
1678 };
1679
1680 /* Init the riscv_ext_order array. */
1681
1682 static void
1683 riscv_init_ext_order (void)
1684 {
1685 static bfd_boolean inited = FALSE;
1686 const char *std_base_exts = "eig";
1687 const char *std_remain_exts = riscv_supported_std_ext ();
1688 const char *ext;
1689 unsigned int i;
1690 int order;
1691
1692 if (inited)
1693 return;
1694
1695 /* All standard extensions' orders are positive numbers. */
1696 order = 1;
1697
1698 /* Init the standard base extensions first. */
1699 for (ext = std_base_exts; *ext; ext++)
1700 riscv_ext_order[(*ext - 'a')] = order++;
1701
1702 /* Init the standard remaining extensions. */
1703 for (ext = std_remain_exts; *ext; ext++)
1704 riscv_ext_order[(*ext - 'a')] = order++;
1705
1706 /* Init the order for prefixed keywords. The orders are
1707 negative numbers. */
1708 order = -1;
1709 for (i = 0; parse_config[i].class != RV_ISA_CLASS_UNKNOWN; i++)
1710 {
1711 ext = parse_config[i].prefix;
1712 riscv_ext_order[(*ext - 'a')] = order--;
1713 }
1714
1715 inited = TRUE;
1716 }
1717
1718 /* Add the implicit extensions according to the arch string extensions. */
1719
1720 static void
1721 riscv_parse_add_implicit_subsets (riscv_parse_subset_t *rps)
1722 {
1723 riscv_subset_t *subset = NULL;
1724
1725 /* Add the zicsr and zifencei only when the i's version less than 2.1. */
1726 if ((riscv_lookup_subset (rps->subset_list, "i", &subset))
1727 && (subset->major_version < 2
1728 || (subset->major_version == 2
1729 && subset->minor_version < 1)))
1730 {
1731 riscv_parse_add_subset (rps, "zicsr",
1732 RISCV_UNKNOWN_VERSION,
1733 RISCV_UNKNOWN_VERSION, TRUE);
1734 riscv_parse_add_subset (rps, "zifencei",
1735 RISCV_UNKNOWN_VERSION,
1736 RISCV_UNKNOWN_VERSION, TRUE);
1737 }
1738
1739 if ((riscv_lookup_subset (rps->subset_list, "q", &subset)))
1740 {
1741 riscv_parse_add_subset (rps, "d",
1742 RISCV_UNKNOWN_VERSION,
1743 RISCV_UNKNOWN_VERSION, TRUE);
1744 riscv_parse_add_subset (rps, "f",
1745 RISCV_UNKNOWN_VERSION,
1746 RISCV_UNKNOWN_VERSION, TRUE);
1747 riscv_parse_add_subset (rps, "zicsr",
1748 RISCV_UNKNOWN_VERSION,
1749 RISCV_UNKNOWN_VERSION, TRUE);
1750 }
1751 else if ((riscv_lookup_subset (rps->subset_list, "d", &subset)))
1752 {
1753 riscv_parse_add_subset (rps, "f",
1754 RISCV_UNKNOWN_VERSION,
1755 RISCV_UNKNOWN_VERSION, TRUE);
1756 riscv_parse_add_subset (rps, "zicsr",
1757 RISCV_UNKNOWN_VERSION,
1758 RISCV_UNKNOWN_VERSION, TRUE);
1759 }
1760 else if ((riscv_lookup_subset (rps->subset_list, "f", &subset)))
1761 riscv_parse_add_subset (rps, "zicsr",
1762 RISCV_UNKNOWN_VERSION,
1763 RISCV_UNKNOWN_VERSION, TRUE);
1764
1765 if ((riscv_lookup_subset (rps->subset_list, "g", &subset)))
1766 {
1767 riscv_parse_add_subset (rps, "zicsr",
1768 RISCV_UNKNOWN_VERSION,
1769 RISCV_UNKNOWN_VERSION, TRUE);
1770 riscv_parse_add_subset (rps, "zifencei",
1771 RISCV_UNKNOWN_VERSION,
1772 RISCV_UNKNOWN_VERSION, TRUE);
1773 }
1774 }
1775
1776 /* Function for parsing arch string.
1777
1778 Return Value:
1779 Return TRUE on success.
1780
1781 Arguments:
1782 `rps`: Hooks and status for parsing extensions.
1783 `arch`: Full arch string. */
1784
1785 bfd_boolean
1786 riscv_parse_subset (riscv_parse_subset_t *rps,
1787 const char *arch)
1788 {
1789 riscv_subset_t *subset = NULL;
1790 const char *p;
1791 size_t i;
1792 bfd_boolean no_conflict = TRUE;
1793
1794 for (p = arch; *p != '\0'; p++)
1795 {
1796 if (ISUPPER (*p))
1797 {
1798 rps->error_handler
1799 (_("-march=%s: ISA string cannot contain uppercase letters"),
1800 arch);
1801 return FALSE;
1802 }
1803 }
1804
1805 p = arch;
1806 if (strncmp (p, "rv32", 4) == 0)
1807 {
1808 *rps->xlen = 32;
1809 p += 4;
1810 }
1811 else if (strncmp (p, "rv64", 4) == 0)
1812 {
1813 *rps->xlen = 64;
1814 p += 4;
1815 }
1816 else
1817 {
1818 /* Arch string shouldn't be NULL or empty here. However,
1819 it might be empty only when we failed to merge the arch
1820 string in the riscv_merge_attributes. We have already
1821 issued the correct error message in another side, so do
1822 not issue this error when the arch string is empty. */
1823 if (strlen (arch))
1824 rps->error_handler (
1825 _("-march=%s: ISA string must begin with rv32 or rv64"),
1826 arch);
1827 return FALSE;
1828 }
1829
1830 /* Init the riscv_ext_order array to compare the order of extensions
1831 quickly. */
1832 riscv_init_ext_order ();
1833
1834 /* Parsing standard extension. */
1835 p = riscv_parse_std_ext (rps, arch, p);
1836
1837 if (p == NULL)
1838 return FALSE;
1839
1840 /* Parse the different classes of extensions in the specified order. */
1841 for (i = 0; i < ARRAY_SIZE (parse_config); ++i)
1842 {
1843 p = riscv_parse_prefixed_ext (rps, arch, p, &parse_config[i]);
1844
1845 if (p == NULL)
1846 return FALSE;
1847 }
1848
1849 if (*p != '\0')
1850 {
1851 rps->error_handler (_("-march=%s: unexpected ISA string at end: %s"),
1852 arch, p);
1853 return FALSE;
1854 }
1855
1856 /* Finally add implicit extensions according to the current
1857 extensions. */
1858 riscv_parse_add_implicit_subsets (rps);
1859
1860 /* Check the conflicts. */
1861 if (riscv_lookup_subset (rps->subset_list, "e", &subset)
1862 && riscv_lookup_subset (rps->subset_list, "f", &subset))
1863 {
1864 rps->error_handler
1865 (_("-march=%s: rv32e does not support the `f' extension"),
1866 arch);
1867 no_conflict = FALSE;
1868 }
1869 if (riscv_lookup_subset (rps->subset_list, "q", &subset)
1870 && *rps->xlen < 64)
1871 {
1872 rps->error_handler
1873 (_("-march=%s: rv32 does not support the `q' extension"),
1874 arch);
1875 no_conflict = FALSE;
1876 }
1877 return no_conflict;
1878 }
1879
1880 /* Return the number of digits for the input. */
1881
1882 size_t
1883 riscv_estimate_digit (unsigned num)
1884 {
1885 size_t digit = 0;
1886 if (num == 0)
1887 return 1;
1888
1889 for (digit = 0; num ; num /= 10)
1890 digit++;
1891
1892 return digit;
1893 }
1894
1895 /* Auxiliary function to estimate string length of subset list. */
1896
1897 static size_t
1898 riscv_estimate_arch_strlen1 (const riscv_subset_t *subset)
1899 {
1900 if (subset == NULL)
1901 return 6; /* For rv32/rv64/rv128 and string terminator. */
1902
1903 return riscv_estimate_arch_strlen1 (subset->next)
1904 + strlen (subset->name)
1905 + riscv_estimate_digit (subset->major_version)
1906 + 1 /* For version seperator: 'p'. */
1907 + riscv_estimate_digit (subset->minor_version)
1908 + 1 /* For underscore. */;
1909 }
1910
1911 /* Estimate the string length of this subset list. */
1912
1913 static size_t
1914 riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list)
1915 {
1916 return riscv_estimate_arch_strlen1 (subset_list->head);
1917 }
1918
1919 /* Auxiliary function to convert subset info to string. */
1920
1921 static void
1922 riscv_arch_str1 (riscv_subset_t *subset,
1923 char *attr_str, char *buf, size_t bufsz)
1924 {
1925 const char *underline = "_";
1926 riscv_subset_t *subset_t = subset;
1927
1928 if (subset_t == NULL)
1929 return;
1930
1931 /* No underline between rvXX and i/e. */
1932 if ((strcasecmp (subset_t->name, "i") == 0)
1933 || (strcasecmp (subset_t->name, "e") == 0))
1934 underline = "";
1935
1936 snprintf (buf, bufsz, "%s%s%dp%d",
1937 underline,
1938 subset_t->name,
1939 subset_t->major_version,
1940 subset_t->minor_version);
1941
1942 strncat (attr_str, buf, bufsz);
1943
1944 /* Skip 'i' extension after 'e', or skip extensions which
1945 versions are unknown. */
1946 while (subset_t->next
1947 && ((strcmp (subset_t->name, "e") == 0
1948 && strcmp (subset_t->next->name, "i") == 0)
1949 || subset_t->next->major_version == RISCV_UNKNOWN_VERSION
1950 || subset_t->next->minor_version == RISCV_UNKNOWN_VERSION))
1951 subset_t = subset_t->next;
1952
1953 riscv_arch_str1 (subset_t->next, attr_str, buf, bufsz);
1954 }
1955
1956 /* Convert subset info to string with explicit version info. */
1957
1958 char *
1959 riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset)
1960 {
1961 size_t arch_str_len = riscv_estimate_arch_strlen (subset);
1962 char *attr_str = xmalloc (arch_str_len);
1963 char *buf = xmalloc (arch_str_len);
1964
1965 snprintf (attr_str, arch_str_len, "rv%u", xlen);
1966
1967 riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len);
1968 free (buf);
1969
1970 return attr_str;
1971 }
A mirror of the official binutils-gdb repository