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RISC-V: Minor cleanup and testcases improvement for arch string parser.
[thirdparty/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
d541518b 1028/* Parsing extension version.
1080bf78
JW		 1029
1030 Return Value:
1031 Points to the end of version
1032
1033 Arguments:
d541518b 1034 `rps`: Hooks and status for parsing extensions.
1080bf78
JW		 1035 `march`: Full arch string.
1036 `p`: Curent parsing position.
1037 `major_version`: Parsing result of major version, using
1038 default_major_version if version is not present in arch string.
1039 `minor_version`: Parsing result of minor version, set to 0 if version is
1040 not present in arch string, but set to `default_minor_version` if
1041 `major_version` using default_major_version.
8f595e9b
NC		 1042 `std_ext_p`: True if parsing std extension.
1043 `use_default_version`: Set it to True if we need the default version. */
1080bf78
JW		 1044
1045static const char *
1046riscv_parsing_subset_version (riscv_parse_subset_t *rps,
1047 const char *march,
1048 const char *p,
1049 unsigned *major_version,
1050 unsigned *minor_version,
8f595e9b
NC		 1051 bfd_boolean std_ext_p,
1052 bfd_boolean *use_default_version)
1080bf78
JW		 1053{
1054 bfd_boolean major_p = TRUE;
1055 unsigned version = 0;
1080bf78
JW		 1056 char np;
1057
8f595e9b
NC		 1058 *major_version = 0;
1059 *minor_version = 0;
1060 for (; *p; ++p)
1080bf78
JW		 1061 {
1062 if (*p == 'p')
1063 {
1064 np = *(p + 1);
1065
1066 if (!ISDIGIT (np))
1067 {
1068 /* Might be beginning of `p` extension. */
1069 if (std_ext_p)
1070 {
1071 *major_version = version;
1072 *minor_version = 0;
1073 return p;
1074 }
1075 else
1076 {
8f595e9b 1077 rps->error_handler
d541518b 1078 (_("-march=%s: expect number after `%dp'"),
8f595e9b 1079 march, version);
1080bf78
JW		 1080 return NULL;
1081 }
1082 }
1083
8f595e9b 1084 *major_version = version;
1080bf78
JW		 1085 major_p = FALSE;
1086 version = 0;
1087 }
1088 else if (ISDIGIT (*p))
1089 version = (version * 10) + (*p - '0');
1090 else
1091 break;
1092 }
1093
1094 if (major_p)
8f595e9b 1095 *major_version = version;
1080bf78 1096 else
8f595e9b 1097 *minor_version = version;
1080bf78 1098
8f595e9b
NC		 1099 /* We can not find any version in string, need to parse default version. */
1100 if (use_default_version != NULL
1101 && *major_version == 0
1102 && *minor_version == 0)
1103 *use_default_version = TRUE;
1080bf78
JW		 1104 return p;
1105}
1106
1107/* Return string which contain all supported standard extensions in
1108 canonical order. */
1109
1110const char *
1111riscv_supported_std_ext (void)
1112{
1113 return "mafdqlcbjtpvn";
1114}
1115
1116/* Parsing function for standard extensions.
1117
1118 Return Value:
1119 Points to the end of extensions.
1120
1121 Arguments:
d541518b 1122 `rps`: Hooks and status for parsing extensions.
1080bf78
JW		 1123 `march`: Full arch string.
1124 `p`: Curent parsing position. */
1125
1126static const char *
1127riscv_parse_std_ext (riscv_parse_subset_t *rps,
8f595e9b
NC		 1128 const char *march,
1129 const char *p)
1080bf78
JW		 1130{
1131 const char *all_std_exts = riscv_supported_std_ext ();
1132 const char *std_exts = all_std_exts;
1080bf78
JW		 1133 unsigned major_version = 0;
1134 unsigned minor_version = 0;
8f595e9b 1135 bfd_boolean use_default_version = FALSE;
d541518b 1136 char subset[2] = {0, 0};
1080bf78
JW		 1137
1138 /* First letter must start with i, e or g. */
1139 switch (*p)
1140 {
1141 case 'i':
d541518b 1142 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1143 &major_version,
d541518b 1144 &minor_version, TRUE,
8f595e9b 1145 &use_default_version);
8f595e9b
NC		 1146 /* Find the default version if needed. */
1147 if (use_default_version
1148 && rps->get_default_version != NULL)
1149 rps->get_default_version ("i",
1150 &major_version,
1151 &minor_version);
1152 riscv_add_subset (rps->subset_list, "i",
d541518b
NC		 1153 major_version,
1154 minor_version);
1080bf78
JW		 1155 break;
1156
1157 case 'e':
d541518b 1158 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1159 &major_version,
d541518b 1160 &minor_version, TRUE,
8f595e9b 1161 &use_default_version);
8f595e9b
NC		 1162 /* Find the default version if needed. */
1163 if (use_default_version
1164 && rps->get_default_version != NULL)
1165 rps->get_default_version ("e",
1166 &major_version,
1167 &minor_version);
1168 riscv_add_subset (rps->subset_list, "e",
d541518b
NC		 1169 major_version,
1170 minor_version);
8f595e9b
NC		 1171
1172 /* i-ext must be enabled. */
1173 if (rps->get_default_version != NULL)
1174 rps->get_default_version ("i",
1175 &major_version,
1176 &minor_version);
1177 riscv_add_subset (rps->subset_list, "i",
d541518b
NC		 1178 major_version,
1179 minor_version);
1080bf78
JW		 1180
1181 if (*rps->xlen > 32)
1182 {
8f595e9b
NC		 1183 rps->error_handler
1184 (_("-march=%s: rv%de is not a valid base ISA"),
1185 march, *rps->xlen);
1080bf78
JW		 1186 return NULL;
1187 }
1080bf78
JW		 1188 break;
1189
1190 case 'g':
8f595e9b
NC		 1191 /* The g-ext shouldn't has the version, so we just
1192 skip the setting if user set a version to it. */
d541518b 1193 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1194 &major_version,
d541518b 1195 &minor_version, TRUE,
8f595e9b 1196 &use_default_version);
8f595e9b
NC		 1197 /* i-ext must be enabled. */
1198 if (rps->get_default_version != NULL)
1199 rps->get_default_version ("i",
1200 &major_version,
1201 &minor_version);
1202 riscv_add_subset (rps->subset_list, "i",
d541518b
NC		 1203 major_version,
1204 minor_version);
1080bf78
JW		 1205
1206 for ( ; *std_exts != 'q'; std_exts++)
1207 {
d541518b 1208 subset[0] = *std_exts;
8f595e9b
NC		 1209 if (rps->get_default_version != NULL)
1210 rps->get_default_version (subset,
1211 &major_version,
1212 &minor_version);
1213 riscv_add_subset (rps->subset_list, subset,
d541518b
NC		 1214 major_version,
1215 minor_version);
1080bf78
JW		 1216 }
1217 break;
1218
1219 default:
8f595e9b 1220 rps->error_handler
d541518b
NC		 1221 (_("-march=%s: first ISA extension must be `e', `i' or `g'"),
1222 march);
1080bf78
JW		 1223 return NULL;
1224 }
1225
8f595e9b 1226 while (p != NULL && *p != '\0')
1080bf78 1227 {
403d1bd9 1228 if (*p == 'x' || *p == 's' || *p == 'z')
1080bf78
JW		 1229 break;
1230
1231 if (*p == '_')
1232 {
1233 p++;
1234 continue;
1235 }
1236
1080bf78 1237 /* Checking canonical order. */
d541518b
NC		 1238 char std_ext = *p;
1239 while (*std_exts && std_ext != *std_exts)
1240 std_exts++;
1080bf78
JW		 1241
1242 if (std_ext != *std_exts)
1243 {
1244 if (strchr (all_std_exts, std_ext) == NULL)
8f595e9b 1245 rps->error_handler
d541518b
NC		 1246 (_("-march=%s: unknown standard ISA extension `%c'"),
1247 march, std_ext);
1080bf78 1248 else
8f595e9b 1249 rps->error_handler
d541518b
NC		 1250 (_("-march=%s: standard ISA extension `%c' is not "
1251 "in canonical order"), march, std_ext);
1080bf78
JW		 1252 return NULL;
1253 }
1254
1255 std_exts++;
8f595e9b 1256 use_default_version = FALSE;
1080bf78 1257 subset[0] = std_ext;
d541518b 1258 p = riscv_parsing_subset_version (rps, march, ++p,
8f595e9b 1259 &major_version,
d541518b 1260 &minor_version, TRUE,
8f595e9b 1261 &use_default_version);
8f595e9b
NC		 1262 /* Find the default version if needed. */
1263 if (use_default_version
1264 && rps->get_default_version != NULL)
1265 rps->get_default_version (subset,
1266 &major_version,
1267 &minor_version);
1268 riscv_add_subset (rps->subset_list, subset,
d541518b
NC		 1269 major_version,
1270 minor_version);
1080bf78 1271 }
d541518b 1272
1080bf78
JW		 1273 return p;
1274}
1275
403d1bd9 1276/* Classify the argument 'arch' into one of riscv_isa_ext_class_t. */
1080bf78 1277
403d1bd9
JW		 1278riscv_isa_ext_class_t
1279riscv_get_prefix_class (const char *arch)
1280{
1281 switch (*arch)
1282 {
b5f998b2 1283 case 's': return RV_ISA_CLASS_S;
403d1bd9
JW		 1284 case 'x': return RV_ISA_CLASS_X;
1285 case 'z': return RV_ISA_CLASS_Z;
1286 default: return RV_ISA_CLASS_UNKNOWN;
1287 }
1288}
1289
1290/* Structure describing parameters to use when parsing a particular
1291 riscv_isa_ext_class_t. One of these should be provided for each
1292 possible class, except RV_ISA_CLASS_UNKNOWN. */
1293
1294typedef struct riscv_parse_config
1295{
1296 /* Class of the extension. */
1297 riscv_isa_ext_class_t class;
1298
d541518b 1299 /* Prefix string for error printing and internal parser usage. */
403d1bd9
JW		 1300 const char *prefix;
1301
d541518b
NC		 1302 /* Predicate which is used for checking whether this is a "known"
1303 extension. For 'x', it always returns true since they are by
403d1bd9
JW		 1304 definition non-standard and cannot be known. */
1305 bfd_boolean (*ext_valid_p) (const char *);
1306} riscv_parse_config_t;
1307
d541518b
NC		 1308/* Parsing function for prefixed extensions.
1309
1310 Return Value:
1311 Points to the end of extension.
1312
1313 Arguments:
1314 `rps`: Hooks and status for parsing extensions.
1315 `march`: Full architecture string.
1316 `p`: Curent parsing position.
1317 `config`: What class and predicate function to use for the
1318 extension. */
1080bf78
JW		 1319
1320static const char *
403d1bd9
JW		 1321riscv_parse_prefixed_ext (riscv_parse_subset_t *rps,
1322 const char *march,
1323 const char *p,
1324 const riscv_parse_config_t *config)
1080bf78
JW		 1325{
1326 unsigned major_version = 0;
1327 unsigned minor_version = 0;
403d1bd9
JW		 1328 const char *last_name;
1329 riscv_isa_ext_class_t class;
8f595e9b 1330 bfd_boolean use_default_version;
1080bf78
JW		 1331
1332 while (*p)
1333 {
1334 if (*p == '_')
1335 {
1336 p++;
1337 continue;
1338 }
1339
403d1bd9
JW		 1340 /* Assert that the current extension specifier matches our parsing
1341 class. */
1342 class = riscv_get_prefix_class (p);
d541518b
NC		 1343 if (class != config->class
1344 || class == RV_ISA_CLASS_UNKNOWN)
1080bf78
JW		 1345 break;
1346
1347 char *subset = xstrdup (p);
1348 char *q = subset;
1349 const char *end_of_version;
1350
1351 while (*++q != '\0' && *q != '_' && !ISDIGIT (*q))
1352 ;
1353
8f595e9b 1354 use_default_version = FALSE;
1080bf78 1355 end_of_version =
d541518b
NC		 1356 riscv_parsing_subset_version (rps, march, q,
1357 &major_version,
8f595e9b
NC		 1358 &minor_version, FALSE,
1359 &use_default_version);
1080bf78
JW		 1360 *q = '\0';
1361
d541518b 1362 /* Check that the prefix extension is known.
403d1bd9 1363 For 'x', anything goes but it cannot simply be 'x'.
b5f998b2
JW		 1364 For 's', it must be known from a list and cannot simply be 's'.
1365 For 'z', it must be known from a list and cannot simply be 'z'. */
403d1bd9
JW		 1366
1367 /* Check that the extension name is well-formed. */
1368 if (!config->ext_valid_p (subset))
1369 {
1370 rps->error_handler
d541518b 1371 (_("-march=%s: unknown %s ISA extension `%s'"),
403d1bd9
JW		 1372 march, config->prefix, subset);
1373 free (subset);
1374 return NULL;
1375 }
1376
d541518b 1377 /* Check that the extension isn't duplicate. */
403d1bd9 1378 last_name = rps->subset_list->tail->name;
403d1bd9
JW		 1379 if (!strcasecmp (last_name, subset))
1380 {
8f595e9b 1381 rps->error_handler
d541518b 1382 (_("-march=%s: duplicate %s ISA extension `%s'"),
8f595e9b 1383 march, config->prefix, subset);
403d1bd9
JW		 1384 free (subset);
1385 return NULL;
1386 }
1387
d541518b 1388 /* Check that the extension is in alphabetical order. */
403d1bd9
JW		 1389 if (!strncasecmp (last_name, config->prefix, 1)
1390 && strcasecmp (last_name, subset) > 0)
1391 {
8f595e9b 1392 rps->error_handler
d541518b
NC		 1393 (_("-march=%s: %s ISA extension `%s' is not in alphabetical "
1394 "order. It must come before `%s'"),
8f595e9b 1395 march, config->prefix, subset, last_name);
403d1bd9
JW		 1396 free (subset);
1397 return NULL;
1398 }
1399
8f595e9b
NC		 1400 /* Find the default version if needed. */
1401 if (use_default_version
1402 && rps->get_default_version != NULL)
1403 rps->get_default_version (subset,
1404 &major_version,
1405 &minor_version);
1406 riscv_add_subset (rps->subset_list, subset,
d541518b
NC		 1407 major_version,
1408 minor_version);
8f595e9b 1409
1080bf78
JW		 1410 free (subset);
1411 p += end_of_version - subset;
1412
1413 if (*p != '\0' && *p != '_')
1414 {
d541518b
NC		 1415 rps->error_handler
1416 (_("-march=%s: %s ISA extension must separate with _"),
1417 march, config->prefix);
1080bf78
JW		 1418 return NULL;
1419 }
1420 }
1421
1422 return p;
1423}
1424
d541518b
NC		 1425/* Lists of prefixed class extensions that binutils should know about.
1426 Whether or not a particular entry is in these lists will dictate if
1427 gas/ld will accept its presence in the architecture string.
403d1bd9 1428
d541518b
NC		 1429 Please add the extensions to the lists in lower case. However, keep
1430 these subsets in alphabetical order in these tables is recommended,
1431 although there is no impact on the current implementation. */
403d1bd9
JW		 1432
1433static const char * const riscv_std_z_ext_strtab[] =
d541518b
NC		 1434{
1435 "zicsr", NULL
1436};
403d1bd9
JW		 1437
1438static const char * const riscv_std_s_ext_strtab[] =
d541518b
NC		 1439{
1440 NULL
1441};
403d1bd9 1442
d541518b
NC		 1443/* For the extension `ext`, search through the list of known extensions
1444 `known_exts` for a match, and return TRUE if found. */
403d1bd9
JW		 1445
1446static bfd_boolean
1447riscv_multi_letter_ext_valid_p (const char *ext,
1448 const char *const *known_exts)
1449{
2d0e1217
AM		 1450 size_t i;
1451
1452 for (i = 0; known_exts[i]; ++i)
1453 if (!strcmp (ext, known_exts[i]))
1454 return TRUE;
403d1bd9
JW		 1455
1456 return FALSE;
1457}
1458
1459/* Predicator function for x-prefixed extensions.
1460 Anything goes, except the literal 'x'. */
1461
1462static bfd_boolean
1463riscv_ext_x_valid_p (const char *arg)
1464{
1465 if (!strcasecmp (arg, "x"))
1466 return FALSE;
1467
1468 return TRUE;
1469}
1470
1471/* Predicator functions for z-prefixed extensions.
1472 Only known z-extensions are permitted. */
1473
1474static bfd_boolean
1475riscv_ext_z_valid_p (const char *arg)
1476{
1477 return riscv_multi_letter_ext_valid_p (arg, riscv_std_z_ext_strtab);
1478}
1479
1480/* Predicator function for 's' prefixed extensions.
d541518b 1481 Only known s-extensions are permitted. */
403d1bd9
JW		 1482
1483static bfd_boolean
1484riscv_ext_s_valid_p (const char *arg)
1485{
1486 return riscv_multi_letter_ext_valid_p (arg, riscv_std_s_ext_strtab);
1487}
1488
d541518b
NC		 1489/* Parsing order of the prefixed extensions that is specified by
1490 the ISA spec. */
403d1bd9
JW		 1491
1492static const riscv_parse_config_t parse_config[] =
1493{
d541518b
NC		 1494 {RV_ISA_CLASS_S, "s", riscv_ext_s_valid_p},
1495 {RV_ISA_CLASS_Z, "z", riscv_ext_z_valid_p},
1496 {RV_ISA_CLASS_X, "x", riscv_ext_x_valid_p},
1497 {RV_ISA_CLASS_UNKNOWN, NULL, NULL}
403d1bd9
JW		 1498};
1499
1080bf78
JW		 1500/* Function for parsing arch string.
1501
1502 Return Value:
1503 Return TRUE on success.
1504
1505 Arguments:
d541518b
NC		 1506 `rps`: Hooks and status for parsing extensions.
1507 `arch`: Full arch string. */
1080bf78
JW		 1508
1509bfd_boolean
1510riscv_parse_subset (riscv_parse_subset_t *rps,
1511 const char *arch)
1512{
1513 const char *p = arch;
effc14f5 1514 size_t i;
1080bf78
JW		 1515
1516 if (strncmp (p, "rv32", 4) == 0)
1517 {
1518 *rps->xlen = 32;
1519 p += 4;
1520 }
1521 else if (strncmp (p, "rv64", 4) == 0)
1522 {
1523 *rps->xlen = 64;
1524 p += 4;
1525 }
1526 else
1527 {
72bd6912
KC		 1528 /* Arch string shouldn't be NULL or empty here. However,
1529 it might be empty only when we failed to merge the arch
1530 string in the riscv_merge_attributes. We have already
1531 issued the correct error message in another side, so do
1532 not issue this error when the arch string is empty. */
1533 if (strlen (arch))
1534 rps->error_handler (
1535 _("-march=%s: ISA string must begin with rv32 or rv64"),
1536 arch);
1080bf78
JW		 1537 return FALSE;
1538 }
1539
1540 /* Parsing standard extension. */
1541 p = riscv_parse_std_ext (rps, arch, p);
1542
1543 if (p == NULL)
1544 return FALSE;
1545
403d1bd9 1546 /* Parse the different classes of extensions in the specified order. */
d541518b
NC		 1547 for (i = 0; i < ARRAY_SIZE (parse_config); ++i)
1548 {
1549 p = riscv_parse_prefixed_ext (rps, arch, p, &parse_config[i]);
1080bf78 1550
d541518b
NC		 1551 if (p == NULL)
1552 return FALSE;
1553 }
1080bf78
JW		 1554
1555 if (*p != '\0')
1556 {
8f595e9b 1557 rps->error_handler (_("-march=%s: unexpected ISA string at end: %s"),
1080bf78
JW		 1558 arch, p);
1559 return FALSE;
1560 }
1561
d541518b 1562 /* Check the conflicts. */
1080bf78
JW		 1563 if (riscv_lookup_subset (rps->subset_list, "e")
1564 && riscv_lookup_subset (rps->subset_list, "f"))
1565 {
8f595e9b
NC		 1566 rps->error_handler
1567 (_("-march=%s: rv32e does not support the `f' extension"),
1568 arch);
1080bf78
JW		 1569 return FALSE;
1570 }
1571
d541518b
NC		 1572 if (riscv_lookup_subset (rps->subset_list, "q") && *rps->xlen < 64)
1573 {
1574 rps->error_handler
1575 (_("-march=%s: rv32 does not support the `q' extension"),
1576 arch);
1577 return FALSE;
1578 }
1579
1080bf78
JW		 1580 if (riscv_lookup_subset (rps->subset_list, "d")
1581 && !riscv_lookup_subset (rps->subset_list, "f"))
1582 {
8f595e9b
NC		 1583 rps->error_handler
1584 (_("-march=%s: `d' extension requires `f' extension"),
1585 arch);
1080bf78
JW		 1586 return FALSE;
1587 }
1588
1589 if (riscv_lookup_subset (rps->subset_list, "q")
1590 && !riscv_lookup_subset (rps->subset_list, "d"))
1591 {
8f595e9b
NC		 1592 rps->error_handler
1593 (_("-march=%s: `q' extension requires `d' extension"),
1594 arch);
1080bf78
JW		 1595 return FALSE;
1596 }
1597
1080bf78
JW		 1598 return TRUE;
1599}
1600
1601/* Add new subset to list. */
1602
1603void
1604riscv_add_subset (riscv_subset_list_t *subset_list,
1605 const char *subset,
8f595e9b
NC		 1606 int major,
1607 int minor)
1080bf78
JW		 1608{
1609 riscv_subset_t *s = xmalloc (sizeof *s);
1610
1611 if (subset_list->head == NULL)
1612 subset_list->head = s;
1613
1614 s->name = xstrdup (subset);
1615 s->major_version = major;
1616 s->minor_version = minor;
1617 s->next = NULL;
1618
1619 if (subset_list->tail != NULL)
1620 subset_list->tail->next = s;
1621
1622 subset_list->tail = s;
1623}
1624
1625/* Find subset in list without version checking, return NULL if not found. */
1626
1627riscv_subset_t *
1628riscv_lookup_subset (const riscv_subset_list_t *subset_list,
1629 const char *subset)
1630{
8f595e9b
NC		 1631 return riscv_lookup_subset_version
1632 (subset_list, subset,
1633 RISCV_DONT_CARE_VERSION,
1634 RISCV_DONT_CARE_VERSION);
1080bf78
JW		 1635}
1636
1637/* Find subset in list with version checking, return NULL if not found. */
1638
1639riscv_subset_t *
1640riscv_lookup_subset_version (const riscv_subset_list_t *subset_list,
1641 const char *subset,
1642 int major, int minor)
1643{
1644 riscv_subset_t *s;
1645
1646 for (s = subset_list->head; s != NULL; s = s->next)
1647 if (strcasecmp (s->name, subset) == 0)
1648 {
1649 if ((major != RISCV_DONT_CARE_VERSION)
1650 && (s->major_version != major))
1651 return NULL;
1652
1653 if ((minor != RISCV_DONT_CARE_VERSION)
1654 && (s->minor_version != minor))
1655 return NULL;
1656
1657 return s;
1658 }
1659
1660 return NULL;
1661}
1662
1663/* Release subset list. */
1664
1665void
1666riscv_release_subset_list (riscv_subset_list_t *subset_list)
1667{
1668 while (subset_list->head != NULL)
1669 {
1670 riscv_subset_t *next = subset_list->head->next;
1671 free ((void *)subset_list->head->name);
1672 free (subset_list->head);
1673 subset_list->head = next;
1674 }
1675
1676 subset_list->tail = NULL;
1677}
2dc8dd17
JW		 1678
1679/* Return the number of digits for the input. */
1680
8f595e9b 1681size_t
2dc8dd17
JW		 1682riscv_estimate_digit (unsigned num)
1683{
1684 size_t digit = 0;
1685 if (num == 0)
1686 return 1;
1687
1688 for (digit = 0; num ; num /= 10)
1689 digit++;
1690
1691 return digit;
1692}
1693
1694/* Auxiliary function to estimate string length of subset list. */
1695
1696static size_t
1697riscv_estimate_arch_strlen1 (const riscv_subset_t *subset)
1698{
1699 if (subset == NULL)
1700 return 6; /* For rv32/rv64/rv128 and string terminator. */
1701
1702 return riscv_estimate_arch_strlen1 (subset->next)
1703 + strlen (subset->name)
1704 + riscv_estimate_digit (subset->major_version)
1705 + 1 /* For version seperator: 'p'. */
1706 + riscv_estimate_digit (subset->minor_version)
1707 + 1 /* For underscore. */;
1708}
1709
1710/* Estimate the string length of this subset list. */
1711
1712static size_t
1713riscv_estimate_arch_strlen (const riscv_subset_list_t *subset_list)
1714{
1715 return riscv_estimate_arch_strlen1 (subset_list->head);
1716}
1717
1718/* Auxiliary function to convert subset info to string. */
1719
1720static void
1721riscv_arch_str1 (riscv_subset_t *subset,
1722 char *attr_str, char *buf, size_t bufsz)
1723{
1724 const char *underline = "_";
1725
1726 if (subset == NULL)
1727 return;
1728
1729 /* No underline between rvXX and i/e. */
1730 if ((strcasecmp (subset->name, "i") == 0)
1731 || (strcasecmp (subset->name, "e") == 0))
1732 underline = "";
1733
1734 snprintf (buf, bufsz, "%s%s%dp%d",
1735 underline,
4b24dd1a
AM		 1736 subset->name,
1737 subset->major_version,
1738 subset->minor_version);
2dc8dd17
JW		 1739
1740 strncat (attr_str, buf, bufsz);
1741
1742 /* Skip 'i' extension after 'e'. */
1743 if ((strcasecmp (subset->name, "e") == 0)
1744 && subset->next
1745 && (strcasecmp (subset->next->name, "i") == 0))
1746 riscv_arch_str1 (subset->next->next, attr_str, buf, bufsz);
1747 else
1748 riscv_arch_str1 (subset->next, attr_str, buf, bufsz);
1749}
1750
1751/* Convert subset info to string with explicit version info. */
1752
1753char *
1754riscv_arch_str (unsigned xlen, const riscv_subset_list_t *subset)
1755{
1756 size_t arch_str_len = riscv_estimate_arch_strlen (subset);
1757 char *attr_str = xmalloc (arch_str_len);
1758 char *buf = xmalloc (arch_str_len);
1759
1760 snprintf (attr_str, arch_str_len, "rv%u", xlen);
1761
1762 riscv_arch_str1 (subset->head, attr_str, buf, arch_str_len);
1763 free (buf);
1764
1765 return attr_str;
1766}
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