projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Automatic date update in version.in
[deliverable/binutils-gdb.git] / bfd / elfxx-riscv.c
CommitLineData
e23eba97 1/* RISC-V-specific support for ELF.
b3adc24a 2 Copyright (C) 2011-2020 Free Software Foundation, Inc.
e23eba97
NC		 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"
e23eba97
NC		 28#include "libiberty.h"
29#include "elfxx-riscv.h"
1080bf78 30#include "safe-ctype.h"
e23eba97
NC		 31
32#define MINUS_ONE ((bfd_vma)0 - 1)
33
57593436
KLC		 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. */
38static bfd_reloc_status_type riscv_elf_add_sub_reloc
39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
40
e23eba97
NC		 41/* The relocation table used for SHT_RELA sections. */
42
43static 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 */
b1b11e92 72 0xffffffff, /* dst_mask */
e23eba97
NC		 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 */
b1b11e92 102 0xffffffff, /* dst_mask */
e23eba97
NC		 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 */
07d6d2b8
AM		 115 0, /* src_mask */
116 0, /* dst_mask */
e23eba97
NC		 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 */
07d6d2b8
AM		 129 0, /* src_mask */
130 0, /* dst_mask */
e23eba97
NC		 131 FALSE), /* pcrel_offset */
132
133 /* Dynamic TLS relocations. */
134 HOWTO (R_RISCV_TLS_DTPMOD32, /* type */
135 0, /* rightshift */
b1b11e92 136 2, /* size */
e23eba97
NC		 137 32, /* bitsize */
138 FALSE, /* pc_relative */
139 0, /* bitpos */
140 complain_overflow_dont, /* complain_on_overflow */
07d6d2b8 141 bfd_elf_generic_reloc, /* special_function */
e23eba97
NC		 142 "R_RISCV_TLS_DTPMOD32", /* name */
143 FALSE, /* partial_inplace */
1d65abb5 144 0, /* src_mask */
b1b11e92 145 0xffffffff, /* dst_mask */
e23eba97
NC		 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 */
07d6d2b8 155 bfd_elf_generic_reloc, /* special_function */
e23eba97
NC		 156 "R_RISCV_TLS_DTPMOD64", /* name */
157 FALSE, /* partial_inplace */
1d65abb5 158 0, /* src_mask */
e23eba97
NC		 159 MINUS_ONE, /* dst_mask */
160 FALSE), /* pcrel_offset */
161
162 HOWTO (R_RISCV_TLS_DTPREL32, /* type */
163 0, /* rightshift */
b1b11e92 164 2, /* size */
e23eba97
NC		 165 32, /* bitsize */
166 FALSE, /* pc_relative */
167 0, /* bitpos */
168 complain_overflow_dont, /* complain_on_overflow */
07d6d2b8 169 bfd_elf_generic_reloc, /* special_function */
e23eba97
NC		 170 "R_RISCV_TLS_DTPREL32", /* name */
171 TRUE, /* partial_inplace */
1d65abb5 172 0, /* src_mask */
b1b11e92 173 0xffffffff, /* dst_mask */
e23eba97
NC		 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 */
07d6d2b8 183 bfd_elf_generic_reloc, /* special_function */
e23eba97
NC		 184 "R_RISCV_TLS_DTPREL64", /* name */
185 TRUE, /* partial_inplace */
1d65abb5 186 0, /* src_mask */
e23eba97
NC		 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 */
07d6d2b8 197 bfd_elf_generic_reloc, /* special_function */
e23eba97
NC		 198 "R_RISCV_TLS_TPREL32", /* name */
199 FALSE, /* partial_inplace */
1d65abb5 200 0, /* src_mask */
b1b11e92 201 0xffffffff, /* dst_mask */
e23eba97
NC		 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 */
07d6d2b8 211 bfd_elf_generic_reloc, /* special_function */
e23eba97
NC		 212 "R_RISCV_TLS_TPREL64", /* name */
213 FALSE, /* partial_inplace */
1d65abb5 214 0, /* src_mask */
e23eba97
NC		 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 */
e23eba97
NC		 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 */
b1b11e92 257 4, /* size */
e23eba97
NC		 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
1d65abb5 270 /* Like R_RISCV_CALL, but not locally binding. */
e23eba97
NC		 271 HOWTO (R_RISCV_CALL_PLT, /* type */
272 0, /* rightshift */
b1b11e92 273 4, /* size */
e23eba97
NC		 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
1d65abb5 466 /* TLS LE thread pointer usage. May be relaxed. */
e23eba97
NC		 467 HOWTO (R_RISCV_TPREL_ADD, /* type */
468 0, /* rightshift */
b1b11e92
AM		 469 3, /* size */
470 0, /* bitsize */
e23eba97
NC		 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 */
b1b11e92 476 FALSE, /* partial_inplace */
e23eba97
NC		 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 */
0b14696a 485 8, /* bitsize */
e23eba97
NC		 486 FALSE, /* pc_relative */
487 0, /* bitpos */
488 complain_overflow_dont, /* complain_on_overflow */
57593436 489 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 490 "R_RISCV_ADD8", /* name */
491 FALSE, /* partial_inplace */
492 0, /* src_mask */
b1b11e92 493 0xff, /* dst_mask */
e23eba97
NC		 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 */
57593436 504 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 505 "R_RISCV_ADD16", /* name */
506 FALSE, /* partial_inplace */
507 0, /* src_mask */
b1b11e92 508 0xffff, /* dst_mask */
e23eba97
NC		 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 */
57593436 519 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 520 "R_RISCV_ADD32", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
b1b11e92 523 0xffffffff, /* dst_mask */
e23eba97
NC		 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 */
57593436 534 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 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 */
57593436 549 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 550 "R_RISCV_SUB8", /* name */
551 FALSE, /* partial_inplace */
552 0, /* src_mask */
b1b11e92 553 0xff, /* dst_mask */
e23eba97
NC		 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 */
57593436 564 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 565 "R_RISCV_SUB16", /* name */
566 FALSE, /* partial_inplace */
567 0, /* src_mask */
b1b11e92 568 0xffff, /* dst_mask */
e23eba97
NC		 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 */
57593436 579 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 580 "R_RISCV_SUB32", /* name */
581 FALSE, /* partial_inplace */
582 0, /* src_mask */
b1b11e92 583 0xffffffff, /* dst_mask */
e23eba97
NC		 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 */
57593436 594 riscv_elf_add_sub_reloc, /* special_function */
e23eba97
NC		 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 */
b1b11e92 636 3, /* size */
e23eba97
NC		 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 */
b1b11e92 646 FALSE), /* pcrel_offset */
e23eba97
NC		 647
648 /* 8-bit PC-relative branch offset. */
649 HOWTO (R_RISCV_RVC_BRANCH, /* type */
650 0, /* rightshift */
b1b11e92
AM		 651 1, /* size */
652 16, /* bitsize */
e23eba97
NC		 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 */
b1b11e92
AM		 666 1, /* size */
667 16, /* bitsize */
e23eba97
NC		 668 TRUE, /* pc_relative */
669 0, /* bitpos */
670 complain_overflow_dont, /* complain_on_overflow */
e23eba97
NC		 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 */
b1b11e92
AM		 681 1, /* size */
682 16, /* bitsize */
e23eba97
NC		 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
1d65abb5 693 /* GP-relative load. */
e23eba97
NC		 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
1d65abb5 708 /* GP-relative store. */
e23eba97
NC		 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 */
45f76423
AW		 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 */
57593436 776 riscv_elf_add_sub_reloc, /* special_function */
45f76423
AW		 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 */
b1b11e92 810 0xff, /* dst_mask */
45f76423
AW		 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 */
b1b11e92 825 0xffff, /* dst_mask */
45f76423
AW		 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 */
b1b11e92 840 0xffffffff, /* dst_mask */
45f76423 841 FALSE), /* pcrel_offset */
a6cbf936
KLC		 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 */
02dd9d25
NC		 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 */
a6cbf936 869 0, /* src_mask */
b1b11e92 870 0xffffffff, /* dst_mask */
a6cbf936 871 FALSE), /* pcrel_offset */
e23eba97
NC		 872};
873
874/* A mapping from BFD reloc types to RISC-V ELF reloc types. */
875
876struct elf_reloc_map
877{
878 bfd_reloc_code_real_type bfd_val;
879 enum elf_riscv_reloc_type elf_val;
880};
881
882static 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 },
45f76423
AW		 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 },
a6cbf936 933 { BFD_RELOC_RISCV_32_PCREL, R_RISCV_32_PCREL },
e23eba97
NC		 934};
935
936/* Given a BFD reloc type, return a howto structure. */
937
938reloc_howto_type *
939riscv_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
952reloc_howto_type *
953riscv_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
964reloc_howto_type *
0aa13fee 965riscv_elf_rtype_to_howto (bfd *abfd, unsigned int r_type)
e23eba97
NC		 966{
967 if (r_type >= ARRAY_SIZE (howto_table))
968 {
0aa13fee
AM		 969 (*_bfd_error_handler) (_("%pB: unsupported relocation type %#x"),
970 abfd, r_type);
e23eba97
NC		 971 bfd_set_error (bfd_error_bad_value);
972 return NULL;
973 }
974 return &howto_table[r_type];
975}
57593436
KLC		 976
977/* Special_function of RISCV_ADD and RISCV_SUB relocations. */
978
979static bfd_reloc_status_type
980riscv_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}
1080bf78 1027
dfe92496 1028/* Array is used to compare the all extensions' order quickly.
7ef19aa6 1029
dfe92496
NC		 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
1034static 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
1040static int
1041riscv_compare_subsets (const char *subset1, const char *subset2)
7ef19aa6 1042{
dfe92496
NC		 1043 int order1 = riscv_ext_order[(*subset1 - 'a')];
1044 int order2 = riscv_ext_order[(*subset2 - 'a')];
7ef19aa6 1045
dfe92496
NC		 1046 /* Compare the standard extension first. */
1047 if (order1 > 0 && order2 > 0)
1048 return order1 - order2;
7ef19aa6 1049
dfe92496
NC		 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
1072bfd_boolean
1073riscv_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;
7ef19aa6
NC		 1094}
1095
dfe92496 1096/* Add arch string extension to the last of the subset list. */
7ef19aa6
NC		 1097
1098void
1099riscv_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
dfe92496
NC		 1119/* Add the implicit extension to the subset list. Search the
1120 list first, and then find the right place to add. */
1121
1122static void
1123riscv_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/* We have to add all arch string extensions first, and then start to
1152 add their implicit extensions. The arch string extensions must be
1153 set in order, so we can add them to the last of the subset list
1154 directly, without searching.
1155
1156 Find the default versions for the extension before adding them to
7ef19aa6
NC		 1157 the subset list, if their versions are RISCV_UNKNOWN_VERSION.
1158 Afterwards, report errors if we can not find their default versions. */
1159
1160static void
1161riscv_parse_add_subset (riscv_parse_subset_t *rps,
1162 const char *subset,
1163 int major,
dfe92496
NC		 1164 int minor,
1165 bfd_boolean implicit)
7ef19aa6
NC		 1166{
1167 int major_version = major;
1168 int minor_version = minor;
1169
1170 if ((major_version == RISCV_UNKNOWN_VERSION
1171 || minor_version == RISCV_UNKNOWN_VERSION)
1172 && rps->get_default_version != NULL)
1173 rps->get_default_version (subset, &major_version, &minor_version);
1174
dfe92496 1175 if (!implicit
00d4d1b0 1176 && strcmp (subset, "g") != 0
dfe92496
NC		 1177 && (major_version == RISCV_UNKNOWN_VERSION
1178 || minor_version == RISCV_UNKNOWN_VERSION))
7ef19aa6
NC		 1179 {
1180 if (subset[0] == 'x')
1181 rps->error_handler
1182 (_("x ISA extension `%s' must be set with the versions"),
1183 subset);
1184 else
1185 rps->error_handler
1186 (_("cannot find default versions of the ISA extension `%s'"),
1187 subset);
1188 return;
1189 }
1190
dfe92496
NC		 1191 if (!implicit)
1192 riscv_add_subset (rps->subset_list, subset,
1193 major_version, minor_version);
1194 else if (major_version != RISCV_UNKNOWN_VERSION
1195 && minor_version != RISCV_UNKNOWN_VERSION)
1196 /* We only add the implicit extension if it is supported in the
1197 chosen ISA spec. */
1198 riscv_add_implicit_subset (rps->subset_list, subset,
1199 major_version, minor_version);
7ef19aa6
NC		 1200}
1201
1202/* Release subset list. */
1203
1204void
1205riscv_release_subset_list (riscv_subset_list_t *subset_list)
1206{
1207 while (subset_list->head != NULL)
1208 {
1209 riscv_subset_t *next = subset_list->head->next;
1210 free ((void *)subset_list->head->name);
1211 free (subset_list->head);
1212 subset_list->head = next;
1213 }
1214
1215 subset_list->tail = NULL;
1216}
1217
d541518b 1218/* Parsing extension version.
1080bf78
JW		 1219
1220 Return Value:
1221 Points to the end of version
1222
1223 Arguments:
d541518b 1224 `rps`: Hooks and status for parsing extensions.
1080bf78
JW		 1225 `march`: Full arch string.
1226 `p`: Curent parsing position.
7ef19aa6
NC		 1227 `major_version`: Parsed major version.
1228 `minor_version`: Parsed minor version.
1229 `std_ext_p`: True if parsing standard extension. */
1080bf78
JW		 1230
1231static const char *
1232riscv_parsing_subset_version (riscv_parse_subset_t *rps,
1233 const char *march,
1234 const char *p,
7ef19aa6
NC		 1235 int *major_version,
1236 int *minor_version,
1237 bfd_boolean std_ext_p)
1080bf78
JW		 1238{
1239 bfd_boolean major_p = TRUE;
7ef19aa6 1240 int version = 0;
1080bf78
JW		 1241 char np;
1242
8f595e9b
NC		 1243 *major_version = 0;
1244 *minor_version = 0;
1245 for (; *p; ++p)
1080bf78
JW		 1246 {
1247 if (*p == 'p')
1248 {
1249 np = *(p + 1);
1250
1251 if (!ISDIGIT (np))
1252 {
1253 /* Might be beginning of `p` extension. */
1254 if (std_ext_p)
1255 {
1256 *major_version = version;
1257 *minor_version = 0;
1258 return p;
1259 }
1260 else
1261 {
8f595e9b 1262 rps->error_handler
d541518b 1263 (_("-march=%s: expect number after `%dp'"),
8f595e9b 1264 march, version);
1080bf78
JW		 1265 return NULL;
1266 }
1267 }
1268
8f595e9b 1269 *major_version = version;
1080bf78
JW		 1270 major_p = FALSE;
1271 version = 0;
1272 }
1273 else if (ISDIGIT (*p))
1274 version = (version * 10) + (*p - '0');
1275 else
1276 break;
1277 }
1278
1279 if (major_p)
8f595e9b 1280 *major_version = version;
1080bf78 1281 else
8f595e9b 1282 *minor_version = version;
1080bf78 1283
7ef19aa6
NC		 1284 /* We can not find any version in string. */
1285 if (*major_version == 0 && *minor_version == 0)
1286 {
1287 *major_version = RISCV_UNKNOWN_VERSION;
1288 *minor_version = RISCV_UNKNOWN_VERSION;
1289 }
1290
1080bf78
JW		 1291 return p;
1292}
1293
1294/* Return string which contain all supported standard extensions in
1295 canonical order. */
1296
1297const char *
1298riscv_supported_std_ext (void)
1299{
1300 return "mafdqlcbjtpvn";
1301}
1302
1303/* Parsing function for standard extensions.
1304
1305 Return Value:
1306 Points to the end of extensions.
1307
1308 Arguments:
d541518b 1309 `rps`: Hooks and status for parsing extensions.
1080bf78
JW		 1310 `march`: Full arch string.
1311 `p`: Curent parsing position. */
1312
1313static const char *
1314riscv_parse_std_ext (riscv_parse_subset_t *rps,
8f595e9b
NC		 1315 const char *march,
1316 const char *p)
1080bf78
JW		 1317{
1318 const char *all_std_exts = riscv_supported_std_ext ();
1319 const char *std_exts = all_std_exts;
7ef19aa6
NC		 1320 int major_version;
1321 int minor_version;
d541518b 1322 char subset[2] = {0, 0};
1080bf78
JW		 1323
1324 /* First letter must start with i, e or g. */
1325 switch (*p)
1326 {
1327 case 'i':
d541518b 1328 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1329 &major_version,
7ef19aa6
NC		 1330 &minor_version, TRUE);
1331 riscv_parse_add_subset (rps, "i",
1332 major_version,
dfe92496 1333 minor_version, FALSE);
1080bf78
JW		 1334 break;
1335
1336 case 'e':
d541518b 1337 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1338 &major_version,
7ef19aa6
NC		 1339 &minor_version, TRUE);
1340 riscv_parse_add_subset (rps, "e",
1341 major_version,
dfe92496 1342 minor_version, FALSE);
8f595e9b 1343 /* i-ext must be enabled. */
7ef19aa6
NC		 1344 riscv_parse_add_subset (rps, "i",
1345 RISCV_UNKNOWN_VERSION,
dfe92496 1346 RISCV_UNKNOWN_VERSION, FALSE);
1080bf78
JW		 1347
1348 if (*rps->xlen > 32)
1349 {
8f595e9b
NC		 1350 rps->error_handler
1351 (_("-march=%s: rv%de is not a valid base ISA"),
1352 march, *rps->xlen);
1080bf78
JW		 1353 return NULL;
1354 }
1080bf78
JW		 1355 break;
1356
1357 case 'g':
d541518b 1358 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1359 &major_version,
7ef19aa6 1360 &minor_version, TRUE);
8f595e9b 1361 /* i-ext must be enabled. */
7ef19aa6
NC		 1362 riscv_parse_add_subset (rps, "i",
1363 RISCV_UNKNOWN_VERSION,
dfe92496 1364 RISCV_UNKNOWN_VERSION, FALSE);
00d4d1b0
NC		 1365 /* g-ext is used to add the implicit extensions, but will
1366 not be output to the arch string. */
1367 riscv_parse_add_subset (rps, "g",
1368 major_version,
1369 minor_version, FALSE);
1080bf78
JW		 1370 for ( ; *std_exts != 'q'; std_exts++)
1371 {
d541518b 1372 subset[0] = *std_exts;
7ef19aa6
NC		 1373 riscv_parse_add_subset (rps, subset,
1374 RISCV_UNKNOWN_VERSION,
dfe92496 1375 RISCV_UNKNOWN_VERSION, FALSE);
1080bf78
JW		 1376 }
1377 break;
1378
1379 default:
8f595e9b 1380 rps->error_handler
d541518b
NC		 1381 (_("-march=%s: first ISA extension must be `e', `i' or `g'"),
1382 march);
1080bf78
JW		 1383 return NULL;
1384 }
1385
8f595e9b 1386 while (p != NULL && *p != '\0')
1080bf78 1387 {
5a1b31e1 1388 if (*p == 'x' || *p == 's' || *p == 'h' || *p == 'z')
1080bf78
JW		 1389 break;
1390
1391 if (*p == '_')
1392 {
1393 p++;
1394 continue;
1395 }
1396
1080bf78 1397 /* Checking canonical order. */
d541518b
NC		 1398 char std_ext = *p;
1399 while (*std_exts && std_ext != *std_exts)
1400 std_exts++;
1080bf78
JW		 1401
1402 if (std_ext != *std_exts)
1403 {
1404 if (strchr (all_std_exts, std_ext) == NULL)
8f595e9b 1405 rps->error_handler
d541518b
NC		 1406 (_("-march=%s: unknown standard ISA extension `%c'"),
1407 march, std_ext);
1080bf78 1408 else
8f595e9b 1409 rps->error_handler
d541518b
NC		 1410 (_("-march=%s: standard ISA extension `%c' is not "
1411 "in canonical order"), march, std_ext);
1080bf78
JW		 1412 return NULL;
1413 }
1414
1415 std_exts++;
1080bf78 1416 subset[0] = std_ext;
d541518b 1417 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1418 &major_version,
7ef19aa6
NC		 1419 &minor_version, TRUE);
1420 riscv_parse_add_subset (rps, subset,
1421 major_version,
dfe92496 1422 minor_version, FALSE);
1080bf78 1423 }
d541518b 1424
1080bf78
JW		 1425 return p;
1426}
1427
403d1bd9 1428/* Classify the argument 'arch' into one of riscv_isa_ext_class_t. */
1080bf78 1429
403d1bd9
JW		 1430riscv_isa_ext_class_t
1431riscv_get_prefix_class (const char *arch)
1432{
1433 switch (*arch)
1434 {
b5f998b2 1435 case 's': return RV_ISA_CLASS_S;
5a1b31e1 1436 case 'h': return RV_ISA_CLASS_H;
403d1bd9
JW		 1437 case 'x': return RV_ISA_CLASS_X;
1438 case 'z': return RV_ISA_CLASS_Z;
1439 default: return RV_ISA_CLASS_UNKNOWN;
1440 }
1441}
1442
1443/* Structure describing parameters to use when parsing a particular
1444 riscv_isa_ext_class_t. One of these should be provided for each
1445 possible class, except RV_ISA_CLASS_UNKNOWN. */
1446
1447typedef struct riscv_parse_config
1448{
1449 /* Class of the extension. */
1450 riscv_isa_ext_class_t class;
1451
d541518b 1452 /* Prefix string for error printing and internal parser usage. */
403d1bd9
JW		 1453 const char *prefix;
1454
d541518b
NC		 1455 /* Predicate which is used for checking whether this is a "known"
1456 extension. For 'x', it always returns true since they are by
403d1bd9
JW		 1457 definition non-standard and cannot be known. */
1458 bfd_boolean (*ext_valid_p) (const char *);
1459} riscv_parse_config_t;
1460
d541518b
NC		 1461/* Parsing function for prefixed extensions.
1462
1463 Return Value:
1464 Points to the end of extension.
1465
1466 Arguments:
1467 `rps`: Hooks and status for parsing extensions.
1468 `march`: Full architecture string.
1469 `p`: Curent parsing position.
1470 `config`: What class and predicate function to use for the
1471 extension. */
1080bf78
JW		 1472
1473static const char *
403d1bd9
JW		 1474riscv_parse_prefixed_ext (riscv_parse_subset_t *rps,
1475 const char *march,
1476 const char *p,
1477 const riscv_parse_config_t *config)
1080bf78 1478{
7ef19aa6
NC		 1479 int major_version;
1480 int minor_version;
403d1bd9
JW		 1481 const char *last_name;
1482 riscv_isa_ext_class_t class;
1080bf78
JW		 1483
1484 while (*p)
1485 {
1486 if (*p == '_')
1487 {
1488 p++;
1489 continue;
1490 }
1491
403d1bd9
JW		 1492 /* Assert that the current extension specifier matches our parsing
1493 class. */
1494 class = riscv_get_prefix_class (p);
d541518b
NC		 1495 if (class != config->class
1496 || class == RV_ISA_CLASS_UNKNOWN)
1080bf78
JW		 1497 break;
1498
1499 char *subset = xstrdup (p);
1500 char *q = subset;
1501 const char *end_of_version;
1502
1503 while (*++q != '\0' && *q != '_' && !ISDIGIT (*q))
1504 ;
1505
1506 end_of_version =
d541518b
NC		 1507 riscv_parsing_subset_version (rps, march, q,
1508 &major_version,
7ef19aa6 1509 &minor_version, FALSE);
1080bf78
JW		 1510 *q = '\0';
1511
7ef19aa6
NC		 1512 if (end_of_version == NULL)
1513 {
1514 free (subset);
1515 return NULL;
1516 }
1517
d541518b 1518 /* Check that the prefix extension is known.
403d1bd9 1519 For 'x', anything goes but it cannot simply be 'x'.
b5f998b2 1520 For 's', it must be known from a list and cannot simply be 's'.
5a1b31e1 1521 For 'h', it must be known from a list and cannot simply be 'h'.
b5f998b2 1522 For 'z', it must be known from a list and cannot simply be 'z'. */
403d1bd9
JW		 1523
1524 /* Check that the extension name is well-formed. */
1525 if (!config->ext_valid_p (subset))
1526 {
1527 rps->error_handler
d541518b 1528 (_("-march=%s: unknown %s ISA extension `%s'"),
403d1bd9
JW		 1529 march, config->prefix, subset);
1530 free (subset);
1531 return NULL;
1532 }
1533
d541518b 1534 /* Check that the extension isn't duplicate. */
403d1bd9 1535 last_name = rps->subset_list->tail->name;
403d1bd9
JW		 1536 if (!strcasecmp (last_name, subset))
1537 {
8f595e9b 1538 rps->error_handler
d541518b 1539 (_("-march=%s: duplicate %s ISA extension `%s'"),
8f595e9b 1540 march, config->prefix, subset);
403d1bd9
JW		 1541 free (subset);
1542 return NULL;
1543 }
1544
d541518b 1545 /* Check that the extension is in alphabetical order. */
6729e2c2 1546 if (riscv_compare_subsets (last_name, subset) > 0)
403d1bd9 1547 {
8f595e9b 1548 rps->error_handler
d541518b
NC		 1549 (_("-march=%s: %s ISA extension `%s' is not in alphabetical "
1550 "order. It must come before `%s'"),
8f595e9b 1551 march, config->prefix, subset, last_name);
403d1bd9
JW		 1552 free (subset);
1553 return NULL;
1554 }
1555
7ef19aa6
NC		 1556 riscv_parse_add_subset (rps, subset,
1557 major_version,
dfe92496 1558 minor_version, FALSE);
1080bf78
JW		 1559 free (subset);
1560 p += end_of_version - subset;
1561
1562 if (*p != '\0' && *p != '_')
1563 {
d541518b
NC		 1564 rps->error_handler
1565 (_("-march=%s: %s ISA extension must separate with _"),
1566 march, config->prefix);
1080bf78
JW		 1567 return NULL;
1568 }
1569 }
1570
1571 return p;
1572}
1573
d541518b
NC		 1574/* Lists of prefixed class extensions that binutils should know about.
1575 Whether or not a particular entry is in these lists will dictate if
1576 gas/ld will accept its presence in the architecture string.
403d1bd9 1577
d541518b
NC		 1578 Please add the extensions to the lists in lower case. However, keep
1579 these subsets in alphabetical order in these tables is recommended,
1580 although there is no impact on the current implementation. */
403d1bd9
JW		 1581
1582static const char * const riscv_std_z_ext_strtab[] =
d541518b 1583{
5a1b31e1 1584 "zicsr", "zifencei", NULL
d541518b 1585};
403d1bd9
JW		 1586
1587static const char * const riscv_std_s_ext_strtab[] =
d541518b
NC		 1588{
1589 NULL
1590};
403d1bd9 1591
5a1b31e1
NC		 1592static const char * const riscv_std_h_ext_strtab[] =
1593{
1594 NULL
1595};
1596
d541518b
NC		 1597/* For the extension `ext`, search through the list of known extensions
1598 `known_exts` for a match, and return TRUE if found. */
403d1bd9
JW		 1599
1600static bfd_boolean
1601riscv_multi_letter_ext_valid_p (const char *ext,
1602 const char *const *known_exts)
1603{
2d0e1217
AM		 1604 size_t i;
1605
1606 for (i = 0; known_exts[i]; ++i)
1607 if (!strcmp (ext, known_exts[i]))
1608 return TRUE;
403d1bd9
JW		 1609
1610 return FALSE;
1611}
1612
1613/* Predicator function for x-prefixed extensions.
1614 Anything goes, except the literal 'x'. */
1615
1616static bfd_boolean
1617riscv_ext_x_valid_p (const char *arg)
1618{
1619 if (!strcasecmp (arg, "x"))
1620 return FALSE;
1621
1622 return TRUE;
1623}
1624
1625/* Predicator functions for z-prefixed extensions.
1626 Only known z-extensions are permitted. */
1627
1628static bfd_boolean
1629riscv_ext_z_valid_p (const char *arg)
1630{
1631 return riscv_multi_letter_ext_valid_p (arg, riscv_std_z_ext_strtab);
1632}
1633
1634/* Predicator function for 's' prefixed extensions.
d541518b 1635 Only known s-extensions are permitted. */
403d1bd9
JW		 1636
1637static bfd_boolean
1638riscv_ext_s_valid_p (const char *arg)
1639{
1640 return riscv_multi_letter_ext_valid_p (arg, riscv_std_s_ext_strtab);
1641}
1642
5a1b31e1
NC		 1643/* Predicator function for 'h' prefixed extensions.
1644 Only known h-extensions are permitted. */
1645
1646static bfd_boolean
1647riscv_ext_h_valid_p (const char *arg)
1648{
1649 return riscv_multi_letter_ext_valid_p (arg, riscv_std_h_ext_strtab);
1650}
1651
d541518b
NC		 1652/* Parsing order of the prefixed extensions that is specified by
1653 the ISA spec. */
403d1bd9
JW		 1654
1655static const riscv_parse_config_t parse_config[] =
1656{
d541518b 1657 {RV_ISA_CLASS_S, "s", riscv_ext_s_valid_p},
5a1b31e1 1658 {RV_ISA_CLASS_H, "h", riscv_ext_h_valid_p},
d541518b
NC		 1659 {RV_ISA_CLASS_Z, "z", riscv_ext_z_valid_p},
1660 {RV_ISA_CLASS_X, "x", riscv_ext_x_valid_p},
1661 {RV_ISA_CLASS_UNKNOWN, NULL, NULL}
403d1bd9
JW		 1662};
1663
dfe92496
NC		 1664/* Init the riscv_ext_order array. */
1665
1666static void
1667riscv_init_ext_order (void)
1668{
1669 static bfd_boolean inited = FALSE;
1670 const char *std_base_exts = "eig";
1671 const char *std_remain_exts = riscv_supported_std_ext ();
1672 const char *ext;
1673 unsigned int i;
1674 int order;
1675
1676 if (inited)
1677 return;
1678
1679 /* All standard extensions' orders are positive numbers. */
1680 order = 1;
1681
1682 /* Init the standard base extensions first. */
1683 for (ext = std_base_exts; *ext; ext++)
1684 riscv_ext_order[(*ext - 'a')] = order++;
1685
1686 /* Init the standard remaining extensions. */
1687 for (ext = std_remain_exts; *ext; ext++)
1688 riscv_ext_order[(*ext - 'a')] = order++;
1689
1690 /* Init the order for prefixed keywords. The orders are
1691 negative numbers. */
1692 order = -1;
1693 for (i = 0; parse_config[i].class != RV_ISA_CLASS_UNKNOWN; i++)
1694 {
1695 ext = parse_config[i].prefix;
1696 riscv_ext_order[(*ext - 'a')] = order--;
1697 }
1698
1699 inited = TRUE;
1700}
1701
1702/* Add the implicit extensions according to the arch string extensions. */
1703
1704static void
1705riscv_parse_add_implicit_subsets (riscv_parse_subset_t *rps)
1706{
1707 riscv_subset_t *subset = NULL;
1708
1709 /* Add the zicsr and zifencei only when the i's version less than 2.1. */
1710 if ((riscv_lookup_subset (rps->subset_list, "i", &subset))
1711 && (subset->major_version < 2
1712 || (subset->major_version == 2
1713 && subset->minor_version < 1)))
1714 {
1715 riscv_parse_add_subset (rps, "zicsr",
1716 RISCV_UNKNOWN_VERSION,
1717 RISCV_UNKNOWN_VERSION, TRUE);
1718 riscv_parse_add_subset (rps, "zifencei",
1719 RISCV_UNKNOWN_VERSION,
1720 RISCV_UNKNOWN_VERSION, TRUE);
1721 }
1722
1723 if ((riscv_lookup_subset (rps->subset_list, "q", &subset)))
1724 {
1725 riscv_parse_add_subset (rps, "d",
1726 RISCV_UNKNOWN_VERSION,
1727 RISCV_UNKNOWN_VERSION, TRUE);
1728 riscv_parse_add_subset (rps, "f",
1729 RISCV_UNKNOWN_VERSION,
1730 RISCV_UNKNOWN_VERSION, TRUE);
1731 riscv_parse_add_subset (rps, "zicsr",
1732 RISCV_UNKNOWN_VERSION,
1733 RISCV_UNKNOWN_VERSION, TRUE);
1734 }
1735 else if ((riscv_lookup_subset (rps->subset_list, "d", &subset)))
1736 {
1737 riscv_parse_add_subset (rps, "f",
1738 RISCV_UNKNOWN_VERSION,
1739 RISCV_UNKNOWN_VERSION, TRUE);
1740 riscv_parse_add_subset (rps, "zicsr",
1741 RISCV_UNKNOWN_VERSION,
1742 RISCV_UNKNOWN_VERSION, TRUE);
1743 }
1744 else if ((riscv_lookup_subset (rps->subset_list, "f", &subset)))
1745 riscv_parse_add_subset (rps, "zicsr",
1746 RISCV_UNKNOWN_VERSION,
1747 RISCV_UNKNOWN_VERSION, TRUE);
00d4d1b0
NC		 1748
1749 if ((riscv_lookup_subset (rps->subset_list, "g", &subset)))
1750 {
1751 riscv_parse_add_subset (rps, "zicsr",
1752 RISCV_UNKNOWN_VERSION,
1753 RISCV_UNKNOWN_VERSION, TRUE);
1754 riscv_parse_add_subset (rps, "zifencei",
1755 RISCV_UNKNOWN_VERSION,
1756 RISCV_UNKNOWN_VERSION, TRUE);
1757 }
dfe92496
NC		 1758}
1759
1080bf78
JW		 1760/* Function for parsing arch string.
1761
1762 Return Value:
1763 Return TRUE on success.
1764
1765 Arguments:
d541518b
NC		 1766 `rps`: Hooks and status for parsing extensions.
1767 `arch`: Full arch string. */
1080bf78
JW		 1768
1769bfd_boolean
1770riscv_parse_subset (riscv_parse_subset_t *rps,
1771 const char *arch)
1772{
dfe92496 1773 riscv_subset_t *subset = NULL;
e8d4709e 1774 const char *p;
effc14f5 1775 size_t i;
7ef19aa6 1776 bfd_boolean no_conflict = TRUE;
1080bf78 1777
e8d4709e
NC		 1778 for (p = arch; *p != '\0'; p++)
1779 {
1780 if (ISUPPER (*p))
1781 {
1782 rps->error_handler
1783 (_("-march=%s: ISA string cannot contain uppercase letters"),
1784 arch);
1785 return FALSE;
1786 }
1787 }
1788
1789 p = arch;
1080bf78
JW		 1790 if (strncmp (p, "rv32", 4) == 0)
1791 {
1792 *rps->xlen = 32;
1793 p += 4;
1794 }
1795 else if (strncmp (p, "rv64", 4) == 0)
1796 {
1797 *rps->xlen = 64;
1798 p += 4;
1799 }
1800 else
1801 {
72bd6912
KC		 1802 /* Arch string shouldn't be NULL or empty here. However,
1803 it might be empty only when we failed to merge the arch
1804 string in the riscv_merge_attributes. We have already
1805 issued the correct error message in another side, so do
1806 not issue this error when the arch string is empty. */
1807 if (strlen (arch))
1808 rps->error_handler (
1809 _("-march=%s: ISA string must begin with rv32 or rv64"),
1810 arch);
1080bf78
JW		 1811 return FALSE;
1812 }
1813
dfe92496
NC		 1814 /* Init the riscv_ext_order array to compare the order of extensions
1815 quickly. */
1816 riscv_init_ext_order ();
1817
1080bf78
JW		 1818 /* Parsing standard extension. */
1819 p = riscv_parse_std_ext (rps, arch, p);
1820
1821 if (p == NULL)
1822 return FALSE;
1823
403d1bd9 1824 /* Parse the different classes of extensions in the specified order. */
d541518b
NC		 1825 for (i = 0; i < ARRAY_SIZE (parse_config); ++i)
1826 {
1827 p = riscv_parse_prefixed_ext (rps, arch, p, &parse_config[i]);
1080bf78 1828
d541518b
NC		 1829 if (p == NULL)
1830 return FALSE;
1831 }
1080bf78
JW		 1832
1833 if (*p != '\0')
1834 {
8f595e9b 1835 rps->error_handler (_("-march=%s: unexpected ISA string at end: %s"),
1080bf78
JW		 1836 arch, p);
1837 return FALSE;
1838 }
1839
dfe92496
NC		 1840 /* Finally add implicit extensions according to the current
1841 extensions. */
1842 riscv_parse_add_implicit_subsets (rps);
1843
d541518b 1844 /* Check the conflicts. */
dfe92496
NC		 1845 if (riscv_lookup_subset (rps->subset_list, "e", &subset)
1846 && riscv_lookup_subset (rps->subset_list, "f", &subset))
1080bf78 1847 {
8f595e9b
NC		 1848 rps->error_handler
1849 (_("-march=%s: rv32e does not support the `f' extension"),
1850 arch);
7ef19aa6 1851 no_conflict = FALSE;
1080bf78 1852 }
dfe92496
NC		 1853 if (riscv_lookup_subset (rps->subset_list, "q", &subset)
1854 && *rps->xlen < 64)
d541518b
NC		 1855 {
1856 rps->error_handler
1857 (_("-march=%s: rv32 does not support the `q' extension"),
1858 arch);
7ef19aa6 1859 no_conflict = FALSE;
d541518b 1860 }
7ef19aa6 1861 return no_conflict;
1080bf78 1862}
2dc8dd17
JW		 1863
1864/* Return the number of digits for the input. */
1865
8f595e9b 1866size_t
2dc8dd17
JW		 1867riscv_estimate_digit (unsigned num)
1868{
1869 size_t digit = 0;
1870 if (num == 0)
1871 return 1;
1872
1873 for (digit = 0; num ; num /= 10)
1874 digit++;
1875
1876 return digit;
1877}
1878
1879/* Auxiliary function to estimate string length of subset list. */
1880
1881static size_t
1882riscv_estimate_arch_strlen1 (const riscv_subset_t *subset)
1883{
1884 if (subset == NULL)
1885 return 6; /* For rv32/rv64/rv128 and string terminator. */
1886
1887 return riscv_estimate_arch_strlen1 (subset->next)
1888 + strlen (subset->name)
1889 + riscv_estimate_digit (subset->major_version)
1890 + 1 /* For version seperator: 'p'. */
1891 + riscv_estimate_digit (subset->minor_version)
1892 + 1 /* For underscore. */;
1893}
1894
1895/* Estimate the string length of this subset list. */
1896
1897static size_t
1898riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list)
1899{
1900 return riscv_estimate_arch_strlen1 (subset_list->head);
1901}
1902
1903/* Auxiliary function to convert subset info to string. */
1904
1905static void
1906riscv_arch_str1 (riscv_subset_t *subset,
1907 char *attr_str, char *buf, size_t bufsz)
1908{
1909 const char *underline = "_";
1910
1911 if (subset == NULL)
1912 return;
1913
1914 /* No underline between rvXX and i/e. */
1915 if ((strcasecmp (subset->name, "i") == 0)
1916 || (strcasecmp (subset->name, "e") == 0))
1917 underline = "";
1918
1919 snprintf (buf, bufsz, "%s%s%dp%d",
1920 underline,
4b24dd1a
AM		 1921 subset->name,
1922 subset->major_version,
1923 subset->minor_version);
2dc8dd17
JW		 1924
1925 strncat (attr_str, buf, bufsz);
1926
00d4d1b0
NC		 1927 /* Skip 'i' extension after 'e', and skip 'g' extension. */
1928 if (subset->next
1929 && ((strcmp (subset->name, "e") == 0
1930 && strcmp (subset->next->name, "i") == 0)
1931 || strcmp (subset->next->name, "g") == 0))
2dc8dd17
JW		 1932 riscv_arch_str1 (subset->next->next, attr_str, buf, bufsz);
1933 else
1934 riscv_arch_str1 (subset->next, attr_str, buf, bufsz);
1935}
1936
1937/* Convert subset info to string with explicit version info. */
1938
1939char *
1940riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset)
1941{
1942 size_t arch_str_len = riscv_estimate_arch_strlen (subset);
1943 char *attr_str = xmalloc (arch_str_len);
1944 char *buf = xmalloc (arch_str_len);
1945
1946 snprintf (attr_str, arch_str_len, "rv%u", xlen);
1947
1948 riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len);
1949 free (buf);
1950
1951 return attr_str;
1952}
GDB Binutils - Deliverables
This page took 0.361758 seconds and 4 git commands to generate.