1 /* RISC-V-specific support for ELF.
2 Copyright (C) 2011-2021 Free Software Foundation, Inc.
4 Contributed by Andrew Waterman (andrew@sifive.com).
5 Based on TILE-Gx and MIPS targets.
7 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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/>. */
27 #include "elf/riscv.h"
28 #include "opcode/riscv.h"
29 #include "libiberty.h"
30 #include "elfxx-riscv.h"
31 #include "safe-ctype.h"
32 #include "cpu-riscv.h"
34 #define MINUS_ONE ((bfd_vma)0 - 1)
36 /* Special handler for ADD/SUB relocations that allows them to be filled out
37 both in the pre-linked and post-linked file. This is necessary to make
38 pre-linked debug info work, as due to linker relaxations we need to emit
39 relocations for the debug info. */
40 static bfd_reloc_status_type riscv_elf_add_sub_reloc
41 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
43 /* The relocation table used for SHT_RELA sections. */
45 static reloc_howto_type howto_table
[] =
48 HOWTO (R_RISCV_NONE
, /* type */
52 false, /* pc_relative */
54 complain_overflow_dont
, /* complain_on_overflow */
55 bfd_elf_generic_reloc
, /* special_function */
56 "R_RISCV_NONE", /* name */
57 false, /* partial_inplace */
60 false), /* pcrel_offset */
62 /* 32 bit relocation. */
63 HOWTO (R_RISCV_32
, /* type */
67 false, /* pc_relative */
69 complain_overflow_dont
, /* complain_on_overflow */
70 bfd_elf_generic_reloc
, /* special_function */
71 "R_RISCV_32", /* name */
72 false, /* partial_inplace */
74 0xffffffff, /* dst_mask */
75 false), /* pcrel_offset */
77 /* 64 bit relocation. */
78 HOWTO (R_RISCV_64
, /* type */
82 false, /* pc_relative */
84 complain_overflow_dont
, /* complain_on_overflow */
85 bfd_elf_generic_reloc
, /* special_function */
86 "R_RISCV_64", /* name */
87 false, /* partial_inplace */
89 MINUS_ONE
, /* dst_mask */
90 false), /* pcrel_offset */
92 /* Relocation against a local symbol in a shared object. */
93 HOWTO (R_RISCV_RELATIVE
, /* type */
97 false, /* pc_relative */
99 complain_overflow_dont
, /* complain_on_overflow */
100 bfd_elf_generic_reloc
, /* special_function */
101 "R_RISCV_RELATIVE", /* name */
102 false, /* partial_inplace */
104 0xffffffff, /* dst_mask */
105 false), /* pcrel_offset */
107 HOWTO (R_RISCV_COPY
, /* type */
109 0, /* this one is variable size */
111 false, /* pc_relative */
113 complain_overflow_bitfield
, /* complain_on_overflow */
114 bfd_elf_generic_reloc
, /* special_function */
115 "R_RISCV_COPY", /* name */
116 false, /* partial_inplace */
119 false), /* pcrel_offset */
121 HOWTO (R_RISCV_JUMP_SLOT
, /* type */
125 false, /* pc_relative */
127 complain_overflow_bitfield
, /* complain_on_overflow */
128 bfd_elf_generic_reloc
, /* special_function */
129 "R_RISCV_JUMP_SLOT", /* name */
130 false, /* partial_inplace */
133 false), /* pcrel_offset */
135 /* Dynamic TLS relocations. */
136 HOWTO (R_RISCV_TLS_DTPMOD32
, /* type */
140 false, /* pc_relative */
142 complain_overflow_dont
, /* complain_on_overflow */
143 bfd_elf_generic_reloc
, /* special_function */
144 "R_RISCV_TLS_DTPMOD32", /* name */
145 false, /* partial_inplace */
147 0xffffffff, /* dst_mask */
148 false), /* pcrel_offset */
150 HOWTO (R_RISCV_TLS_DTPMOD64
, /* type */
154 false, /* pc_relative */
156 complain_overflow_dont
, /* complain_on_overflow */
157 bfd_elf_generic_reloc
, /* special_function */
158 "R_RISCV_TLS_DTPMOD64", /* name */
159 false, /* partial_inplace */
161 MINUS_ONE
, /* dst_mask */
162 false), /* pcrel_offset */
164 HOWTO (R_RISCV_TLS_DTPREL32
, /* type */
168 false, /* pc_relative */
170 complain_overflow_dont
, /* complain_on_overflow */
171 bfd_elf_generic_reloc
, /* special_function */
172 "R_RISCV_TLS_DTPREL32", /* name */
173 true, /* partial_inplace */
175 0xffffffff, /* dst_mask */
176 false), /* pcrel_offset */
178 HOWTO (R_RISCV_TLS_DTPREL64
, /* type */
182 false, /* pc_relative */
184 complain_overflow_dont
, /* complain_on_overflow */
185 bfd_elf_generic_reloc
, /* special_function */
186 "R_RISCV_TLS_DTPREL64", /* name */
187 true, /* partial_inplace */
189 MINUS_ONE
, /* dst_mask */
190 false), /* pcrel_offset */
192 HOWTO (R_RISCV_TLS_TPREL32
, /* type */
196 false, /* pc_relative */
198 complain_overflow_dont
, /* complain_on_overflow */
199 bfd_elf_generic_reloc
, /* special_function */
200 "R_RISCV_TLS_TPREL32", /* name */
201 false, /* partial_inplace */
203 0xffffffff, /* dst_mask */
204 false), /* pcrel_offset */
206 HOWTO (R_RISCV_TLS_TPREL64
, /* type */
210 false, /* pc_relative */
212 complain_overflow_dont
, /* complain_on_overflow */
213 bfd_elf_generic_reloc
, /* special_function */
214 "R_RISCV_TLS_TPREL64", /* name */
215 false, /* partial_inplace */
217 MINUS_ONE
, /* dst_mask */
218 false), /* pcrel_offset */
220 /* Reserved for future relocs that the dynamic linker must understand. */
226 /* 12-bit PC-relative branch offset. */
227 HOWTO (R_RISCV_BRANCH
, /* type */
231 true, /* pc_relative */
233 complain_overflow_signed
, /* complain_on_overflow */
234 bfd_elf_generic_reloc
, /* special_function */
235 "R_RISCV_BRANCH", /* name */
236 false, /* partial_inplace */
238 ENCODE_BTYPE_IMM (-1U), /* dst_mask */
239 true), /* pcrel_offset */
241 /* 20-bit PC-relative jump offset. */
242 HOWTO (R_RISCV_JAL
, /* type */
246 true, /* pc_relative */
248 complain_overflow_dont
, /* complain_on_overflow */
249 bfd_elf_generic_reloc
, /* special_function */
250 "R_RISCV_JAL", /* name */
251 false, /* partial_inplace */
253 ENCODE_JTYPE_IMM (-1U), /* dst_mask */
254 true), /* pcrel_offset */
256 /* 32-bit PC-relative function call (AUIPC/JALR). */
257 HOWTO (R_RISCV_CALL
, /* type */
261 true, /* pc_relative */
263 complain_overflow_dont
, /* complain_on_overflow */
264 bfd_elf_generic_reloc
, /* special_function */
265 "R_RISCV_CALL", /* name */
266 false, /* partial_inplace */
268 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma
) ENCODE_ITYPE_IMM (-1U) << 32),
270 true), /* pcrel_offset */
272 /* Like R_RISCV_CALL, but not locally binding. */
273 HOWTO (R_RISCV_CALL_PLT
, /* type */
277 true, /* pc_relative */
279 complain_overflow_dont
, /* complain_on_overflow */
280 bfd_elf_generic_reloc
, /* special_function */
281 "R_RISCV_CALL_PLT", /* name */
282 false, /* partial_inplace */
284 ENCODE_UTYPE_IMM (-1U) | ((bfd_vma
) ENCODE_ITYPE_IMM (-1U) << 32),
286 true), /* pcrel_offset */
288 /* High 20 bits of 32-bit PC-relative GOT access. */
289 HOWTO (R_RISCV_GOT_HI20
, /* type */
293 true, /* pc_relative */
295 complain_overflow_dont
, /* complain_on_overflow */
296 bfd_elf_generic_reloc
, /* special_function */
297 "R_RISCV_GOT_HI20", /* name */
298 false, /* partial_inplace */
300 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
301 false), /* pcrel_offset */
303 /* High 20 bits of 32-bit PC-relative TLS IE GOT access. */
304 HOWTO (R_RISCV_TLS_GOT_HI20
, /* type */
308 true, /* pc_relative */
310 complain_overflow_dont
, /* complain_on_overflow */
311 bfd_elf_generic_reloc
, /* special_function */
312 "R_RISCV_TLS_GOT_HI20", /* name */
313 false, /* partial_inplace */
315 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
316 false), /* pcrel_offset */
318 /* High 20 bits of 32-bit PC-relative TLS GD GOT reference. */
319 HOWTO (R_RISCV_TLS_GD_HI20
, /* type */
323 true, /* pc_relative */
325 complain_overflow_dont
, /* complain_on_overflow */
326 bfd_elf_generic_reloc
, /* special_function */
327 "R_RISCV_TLS_GD_HI20", /* name */
328 false, /* partial_inplace */
330 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
331 false), /* pcrel_offset */
333 /* High 20 bits of 32-bit PC-relative reference. */
334 HOWTO (R_RISCV_PCREL_HI20
, /* type */
338 true, /* pc_relative */
340 complain_overflow_dont
, /* complain_on_overflow */
341 bfd_elf_generic_reloc
, /* special_function */
342 "R_RISCV_PCREL_HI20", /* name */
343 false, /* partial_inplace */
345 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
346 true), /* pcrel_offset */
348 /* Low 12 bits of a 32-bit PC-relative load or add. */
349 HOWTO (R_RISCV_PCREL_LO12_I
, /* type */
353 false, /* pc_relative */
355 complain_overflow_dont
, /* complain_on_overflow */
356 bfd_elf_generic_reloc
, /* special_function */
357 "R_RISCV_PCREL_LO12_I", /* name */
358 false, /* partial_inplace */
360 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
361 false), /* pcrel_offset */
363 /* Low 12 bits of a 32-bit PC-relative store. */
364 HOWTO (R_RISCV_PCREL_LO12_S
, /* type */
368 false, /* pc_relative */
370 complain_overflow_dont
, /* complain_on_overflow */
371 bfd_elf_generic_reloc
, /* special_function */
372 "R_RISCV_PCREL_LO12_S", /* name */
373 false, /* partial_inplace */
375 ENCODE_STYPE_IMM (-1U), /* dst_mask */
376 false), /* pcrel_offset */
378 /* High 20 bits of 32-bit absolute address. */
379 HOWTO (R_RISCV_HI20
, /* type */
383 false, /* pc_relative */
385 complain_overflow_dont
, /* complain_on_overflow */
386 bfd_elf_generic_reloc
, /* special_function */
387 "R_RISCV_HI20", /* name */
388 false, /* partial_inplace */
390 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
391 false), /* pcrel_offset */
393 /* High 12 bits of 32-bit load or add. */
394 HOWTO (R_RISCV_LO12_I
, /* type */
398 false, /* pc_relative */
400 complain_overflow_dont
, /* complain_on_overflow */
401 bfd_elf_generic_reloc
, /* special_function */
402 "R_RISCV_LO12_I", /* name */
403 false, /* partial_inplace */
405 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
406 false), /* pcrel_offset */
408 /* High 12 bits of 32-bit store. */
409 HOWTO (R_RISCV_LO12_S
, /* type */
413 false, /* pc_relative */
415 complain_overflow_dont
, /* complain_on_overflow */
416 bfd_elf_generic_reloc
, /* special_function */
417 "R_RISCV_LO12_S", /* name */
418 false, /* partial_inplace */
420 ENCODE_STYPE_IMM (-1U), /* dst_mask */
421 false), /* pcrel_offset */
423 /* High 20 bits of TLS LE thread pointer offset. */
424 HOWTO (R_RISCV_TPREL_HI20
, /* type */
428 false, /* pc_relative */
430 complain_overflow_signed
, /* complain_on_overflow */
431 bfd_elf_generic_reloc
, /* special_function */
432 "R_RISCV_TPREL_HI20", /* name */
433 true, /* partial_inplace */
435 ENCODE_UTYPE_IMM (-1U), /* dst_mask */
436 false), /* pcrel_offset */
438 /* Low 12 bits of TLS LE thread pointer offset for loads and adds. */
439 HOWTO (R_RISCV_TPREL_LO12_I
, /* type */
443 false, /* pc_relative */
445 complain_overflow_signed
, /* complain_on_overflow */
446 bfd_elf_generic_reloc
, /* special_function */
447 "R_RISCV_TPREL_LO12_I", /* name */
448 false, /* partial_inplace */
450 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
451 false), /* pcrel_offset */
453 /* Low 12 bits of TLS LE thread pointer offset for stores. */
454 HOWTO (R_RISCV_TPREL_LO12_S
, /* type */
458 false, /* pc_relative */
460 complain_overflow_signed
, /* complain_on_overflow */
461 bfd_elf_generic_reloc
, /* special_function */
462 "R_RISCV_TPREL_LO12_S", /* name */
463 false, /* partial_inplace */
465 ENCODE_STYPE_IMM (-1U), /* dst_mask */
466 false), /* pcrel_offset */
468 /* TLS LE thread pointer usage. May be relaxed. */
469 HOWTO (R_RISCV_TPREL_ADD
, /* type */
473 false, /* pc_relative */
475 complain_overflow_dont
, /* complain_on_overflow */
476 bfd_elf_generic_reloc
, /* special_function */
477 "R_RISCV_TPREL_ADD", /* name */
478 false, /* partial_inplace */
481 false), /* pcrel_offset */
483 /* 8-bit in-place addition, for local label subtraction. */
484 HOWTO (R_RISCV_ADD8
, /* type */
488 false, /* pc_relative */
490 complain_overflow_dont
, /* complain_on_overflow */
491 riscv_elf_add_sub_reloc
, /* special_function */
492 "R_RISCV_ADD8", /* name */
493 false, /* partial_inplace */
496 false), /* pcrel_offset */
498 /* 16-bit in-place addition, for local label subtraction. */
499 HOWTO (R_RISCV_ADD16
, /* type */
503 false, /* pc_relative */
505 complain_overflow_dont
, /* complain_on_overflow */
506 riscv_elf_add_sub_reloc
, /* special_function */
507 "R_RISCV_ADD16", /* name */
508 false, /* partial_inplace */
510 0xffff, /* dst_mask */
511 false), /* pcrel_offset */
513 /* 32-bit in-place addition, for local label subtraction. */
514 HOWTO (R_RISCV_ADD32
, /* type */
518 false, /* pc_relative */
520 complain_overflow_dont
, /* complain_on_overflow */
521 riscv_elf_add_sub_reloc
, /* special_function */
522 "R_RISCV_ADD32", /* name */
523 false, /* partial_inplace */
525 0xffffffff, /* dst_mask */
526 false), /* pcrel_offset */
528 /* 64-bit in-place addition, for local label subtraction. */
529 HOWTO (R_RISCV_ADD64
, /* type */
533 false, /* pc_relative */
535 complain_overflow_dont
, /* complain_on_overflow */
536 riscv_elf_add_sub_reloc
, /* special_function */
537 "R_RISCV_ADD64", /* name */
538 false, /* partial_inplace */
540 MINUS_ONE
, /* dst_mask */
541 false), /* pcrel_offset */
543 /* 8-bit in-place addition, for local label subtraction. */
544 HOWTO (R_RISCV_SUB8
, /* type */
548 false, /* pc_relative */
550 complain_overflow_dont
, /* complain_on_overflow */
551 riscv_elf_add_sub_reloc
, /* special_function */
552 "R_RISCV_SUB8", /* name */
553 false, /* partial_inplace */
556 false), /* pcrel_offset */
558 /* 16-bit in-place addition, for local label subtraction. */
559 HOWTO (R_RISCV_SUB16
, /* type */
563 false, /* pc_relative */
565 complain_overflow_dont
, /* complain_on_overflow */
566 riscv_elf_add_sub_reloc
, /* special_function */
567 "R_RISCV_SUB16", /* name */
568 false, /* partial_inplace */
570 0xffff, /* dst_mask */
571 false), /* pcrel_offset */
573 /* 32-bit in-place addition, for local label subtraction. */
574 HOWTO (R_RISCV_SUB32
, /* type */
578 false, /* pc_relative */
580 complain_overflow_dont
, /* complain_on_overflow */
581 riscv_elf_add_sub_reloc
, /* special_function */
582 "R_RISCV_SUB32", /* name */
583 false, /* partial_inplace */
585 0xffffffff, /* dst_mask */
586 false), /* pcrel_offset */
588 /* 64-bit in-place addition, for local label subtraction. */
589 HOWTO (R_RISCV_SUB64
, /* type */
593 false, /* pc_relative */
595 complain_overflow_dont
, /* complain_on_overflow */
596 riscv_elf_add_sub_reloc
, /* special_function */
597 "R_RISCV_SUB64", /* name */
598 false, /* partial_inplace */
600 MINUS_ONE
, /* dst_mask */
601 false), /* pcrel_offset */
603 /* GNU extension to record C++ vtable hierarchy */
604 HOWTO (R_RISCV_GNU_VTINHERIT
, /* type */
608 false, /* pc_relative */
610 complain_overflow_dont
, /* complain_on_overflow */
611 NULL
, /* special_function */
612 "R_RISCV_GNU_VTINHERIT", /* name */
613 false, /* partial_inplace */
616 false), /* pcrel_offset */
618 /* GNU extension to record C++ vtable member usage */
619 HOWTO (R_RISCV_GNU_VTENTRY
, /* type */
623 false, /* pc_relative */
625 complain_overflow_dont
, /* complain_on_overflow */
626 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
627 "R_RISCV_GNU_VTENTRY", /* name */
628 false, /* partial_inplace */
631 false), /* pcrel_offset */
633 /* Indicates an alignment statement. The addend field encodes how many
634 bytes of NOPs follow the statement. The desired alignment is the
635 addend rounded up to the next power of two. */
636 HOWTO (R_RISCV_ALIGN
, /* type */
640 false, /* pc_relative */
642 complain_overflow_dont
, /* complain_on_overflow */
643 bfd_elf_generic_reloc
, /* special_function */
644 "R_RISCV_ALIGN", /* name */
645 false, /* partial_inplace */
648 false), /* pcrel_offset */
650 /* 8-bit PC-relative branch offset. */
651 HOWTO (R_RISCV_RVC_BRANCH
, /* type */
655 true, /* pc_relative */
657 complain_overflow_signed
, /* complain_on_overflow */
658 bfd_elf_generic_reloc
, /* special_function */
659 "R_RISCV_RVC_BRANCH", /* name */
660 false, /* partial_inplace */
662 ENCODE_CBTYPE_IMM (-1U), /* dst_mask */
663 true), /* pcrel_offset */
665 /* 11-bit PC-relative jump offset. */
666 HOWTO (R_RISCV_RVC_JUMP
, /* type */
670 true, /* pc_relative */
672 complain_overflow_dont
, /* complain_on_overflow */
673 bfd_elf_generic_reloc
, /* special_function */
674 "R_RISCV_RVC_JUMP", /* name */
675 false, /* partial_inplace */
677 ENCODE_CJTYPE_IMM (-1U), /* dst_mask */
678 true), /* pcrel_offset */
680 /* High 6 bits of 18-bit absolute address. */
681 HOWTO (R_RISCV_RVC_LUI
, /* type */
685 false, /* pc_relative */
687 complain_overflow_dont
, /* complain_on_overflow */
688 bfd_elf_generic_reloc
, /* special_function */
689 "R_RISCV_RVC_LUI", /* name */
690 false, /* partial_inplace */
692 ENCODE_CITYPE_IMM (-1U), /* dst_mask */
693 false), /* pcrel_offset */
695 /* GP-relative load. */
696 HOWTO (R_RISCV_GPREL_I
, /* type */
700 false, /* pc_relative */
702 complain_overflow_dont
, /* complain_on_overflow */
703 bfd_elf_generic_reloc
, /* special_function */
704 "R_RISCV_GPREL_I", /* name */
705 false, /* partial_inplace */
707 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
708 false), /* pcrel_offset */
710 /* GP-relative store. */
711 HOWTO (R_RISCV_GPREL_S
, /* type */
715 false, /* pc_relative */
717 complain_overflow_dont
, /* complain_on_overflow */
718 bfd_elf_generic_reloc
, /* special_function */
719 "R_RISCV_GPREL_S", /* name */
720 false, /* partial_inplace */
722 ENCODE_STYPE_IMM (-1U), /* dst_mask */
723 false), /* pcrel_offset */
725 /* TP-relative TLS LE load. */
726 HOWTO (R_RISCV_TPREL_I
, /* type */
730 false, /* pc_relative */
732 complain_overflow_signed
, /* complain_on_overflow */
733 bfd_elf_generic_reloc
, /* special_function */
734 "R_RISCV_TPREL_I", /* name */
735 false, /* partial_inplace */
737 ENCODE_ITYPE_IMM (-1U), /* dst_mask */
738 false), /* pcrel_offset */
740 /* TP-relative TLS LE store. */
741 HOWTO (R_RISCV_TPREL_S
, /* type */
745 false, /* pc_relative */
747 complain_overflow_signed
, /* complain_on_overflow */
748 bfd_elf_generic_reloc
, /* special_function */
749 "R_RISCV_TPREL_S", /* name */
750 false, /* partial_inplace */
752 ENCODE_STYPE_IMM (-1U), /* dst_mask */
753 false), /* pcrel_offset */
755 /* The paired relocation may be relaxed. */
756 HOWTO (R_RISCV_RELAX
, /* type */
760 false, /* pc_relative */
762 complain_overflow_dont
, /* complain_on_overflow */
763 bfd_elf_generic_reloc
, /* special_function */
764 "R_RISCV_RELAX", /* name */
765 false, /* partial_inplace */
768 false), /* pcrel_offset */
770 /* 6-bit in-place addition, for local label subtraction. */
771 HOWTO (R_RISCV_SUB6
, /* type */
775 false, /* pc_relative */
777 complain_overflow_dont
, /* complain_on_overflow */
778 riscv_elf_add_sub_reloc
, /* special_function */
779 "R_RISCV_SUB6", /* name */
780 false, /* partial_inplace */
783 false), /* pcrel_offset */
785 /* 6-bit in-place setting, for local label subtraction. */
786 HOWTO (R_RISCV_SET6
, /* type */
790 false, /* pc_relative */
792 complain_overflow_dont
, /* complain_on_overflow */
793 bfd_elf_generic_reloc
, /* special_function */
794 "R_RISCV_SET6", /* name */
795 false, /* partial_inplace */
798 false), /* pcrel_offset */
800 /* 8-bit in-place setting, for local label subtraction. */
801 HOWTO (R_RISCV_SET8
, /* type */
805 false, /* pc_relative */
807 complain_overflow_dont
, /* complain_on_overflow */
808 bfd_elf_generic_reloc
, /* special_function */
809 "R_RISCV_SET8", /* name */
810 false, /* partial_inplace */
813 false), /* pcrel_offset */
815 /* 16-bit in-place setting, for local label subtraction. */
816 HOWTO (R_RISCV_SET16
, /* type */
820 false, /* pc_relative */
822 complain_overflow_dont
, /* complain_on_overflow */
823 bfd_elf_generic_reloc
, /* special_function */
824 "R_RISCV_SET16", /* name */
825 false, /* partial_inplace */
827 0xffff, /* dst_mask */
828 false), /* pcrel_offset */
830 /* 32-bit in-place setting, for local label subtraction. */
831 HOWTO (R_RISCV_SET32
, /* type */
835 false, /* pc_relative */
837 complain_overflow_dont
, /* complain_on_overflow */
838 bfd_elf_generic_reloc
, /* special_function */
839 "R_RISCV_SET32", /* name */
840 false, /* partial_inplace */
842 0xffffffff, /* dst_mask */
843 false), /* pcrel_offset */
845 /* 32-bit PC relative. */
846 HOWTO (R_RISCV_32_PCREL
, /* type */
850 true, /* pc_relative */
852 complain_overflow_dont
, /* complain_on_overflow */
853 bfd_elf_generic_reloc
, /* special_function */
854 "R_RISCV_32_PCREL", /* name */
855 false, /* partial_inplace */
857 0xffffffff, /* dst_mask */
858 false), /* pcrel_offset */
860 /* Relocation against a local ifunc symbol in a shared object. */
861 HOWTO (R_RISCV_IRELATIVE
, /* type */
865 false, /* pc_relative */
867 complain_overflow_dont
, /* complain_on_overflow */
868 bfd_elf_generic_reloc
, /* special_function */
869 "R_RISCV_IRELATIVE", /* name */
870 false, /* partial_inplace */
872 0xffffffff, /* dst_mask */
873 false), /* pcrel_offset */
876 /* A mapping from BFD reloc types to RISC-V ELF reloc types. */
879 bfd_reloc_code_real_type bfd_val
;
880 enum elf_riscv_reloc_type elf_val
;
883 static const struct elf_reloc_map riscv_reloc_map
[] =
885 { BFD_RELOC_NONE
, R_RISCV_NONE
},
886 { BFD_RELOC_32
, R_RISCV_32
},
887 { BFD_RELOC_64
, R_RISCV_64
},
888 { BFD_RELOC_RISCV_ADD8
, R_RISCV_ADD8
},
889 { BFD_RELOC_RISCV_ADD16
, R_RISCV_ADD16
},
890 { BFD_RELOC_RISCV_ADD32
, R_RISCV_ADD32
},
891 { BFD_RELOC_RISCV_ADD64
, R_RISCV_ADD64
},
892 { BFD_RELOC_RISCV_SUB8
, R_RISCV_SUB8
},
893 { BFD_RELOC_RISCV_SUB16
, R_RISCV_SUB16
},
894 { BFD_RELOC_RISCV_SUB32
, R_RISCV_SUB32
},
895 { BFD_RELOC_RISCV_SUB64
, R_RISCV_SUB64
},
896 { BFD_RELOC_CTOR
, R_RISCV_64
},
897 { BFD_RELOC_12_PCREL
, R_RISCV_BRANCH
},
898 { BFD_RELOC_RISCV_HI20
, R_RISCV_HI20
},
899 { BFD_RELOC_RISCV_LO12_I
, R_RISCV_LO12_I
},
900 { BFD_RELOC_RISCV_LO12_S
, R_RISCV_LO12_S
},
901 { BFD_RELOC_RISCV_PCREL_LO12_I
, R_RISCV_PCREL_LO12_I
},
902 { BFD_RELOC_RISCV_PCREL_LO12_S
, R_RISCV_PCREL_LO12_S
},
903 { BFD_RELOC_RISCV_CALL
, R_RISCV_CALL
},
904 { BFD_RELOC_RISCV_CALL_PLT
, R_RISCV_CALL_PLT
},
905 { BFD_RELOC_RISCV_PCREL_HI20
, R_RISCV_PCREL_HI20
},
906 { BFD_RELOC_RISCV_JMP
, R_RISCV_JAL
},
907 { BFD_RELOC_RISCV_GOT_HI20
, R_RISCV_GOT_HI20
},
908 { BFD_RELOC_RISCV_TLS_DTPMOD32
, R_RISCV_TLS_DTPMOD32
},
909 { BFD_RELOC_RISCV_TLS_DTPREL32
, R_RISCV_TLS_DTPREL32
},
910 { BFD_RELOC_RISCV_TLS_DTPMOD64
, R_RISCV_TLS_DTPMOD64
},
911 { BFD_RELOC_RISCV_TLS_DTPREL64
, R_RISCV_TLS_DTPREL64
},
912 { BFD_RELOC_RISCV_TLS_TPREL32
, R_RISCV_TLS_TPREL32
},
913 { BFD_RELOC_RISCV_TLS_TPREL64
, R_RISCV_TLS_TPREL64
},
914 { BFD_RELOC_RISCV_TPREL_HI20
, R_RISCV_TPREL_HI20
},
915 { BFD_RELOC_RISCV_TPREL_ADD
, R_RISCV_TPREL_ADD
},
916 { BFD_RELOC_RISCV_TPREL_LO12_S
, R_RISCV_TPREL_LO12_S
},
917 { BFD_RELOC_RISCV_TPREL_LO12_I
, R_RISCV_TPREL_LO12_I
},
918 { BFD_RELOC_RISCV_TLS_GOT_HI20
, R_RISCV_TLS_GOT_HI20
},
919 { BFD_RELOC_RISCV_TLS_GD_HI20
, R_RISCV_TLS_GD_HI20
},
920 { BFD_RELOC_RISCV_ALIGN
, R_RISCV_ALIGN
},
921 { BFD_RELOC_RISCV_RVC_BRANCH
, R_RISCV_RVC_BRANCH
},
922 { BFD_RELOC_RISCV_RVC_JUMP
, R_RISCV_RVC_JUMP
},
923 { BFD_RELOC_RISCV_RVC_LUI
, R_RISCV_RVC_LUI
},
924 { BFD_RELOC_RISCV_GPREL_I
, R_RISCV_GPREL_I
},
925 { BFD_RELOC_RISCV_GPREL_S
, R_RISCV_GPREL_S
},
926 { BFD_RELOC_RISCV_TPREL_I
, R_RISCV_TPREL_I
},
927 { BFD_RELOC_RISCV_TPREL_S
, R_RISCV_TPREL_S
},
928 { BFD_RELOC_RISCV_RELAX
, R_RISCV_RELAX
},
929 { BFD_RELOC_RISCV_SUB6
, R_RISCV_SUB6
},
930 { BFD_RELOC_RISCV_SET6
, R_RISCV_SET6
},
931 { BFD_RELOC_RISCV_SET8
, R_RISCV_SET8
},
932 { BFD_RELOC_RISCV_SET16
, R_RISCV_SET16
},
933 { BFD_RELOC_RISCV_SET32
, R_RISCV_SET32
},
934 { BFD_RELOC_RISCV_32_PCREL
, R_RISCV_32_PCREL
},
937 /* Given a BFD reloc type, return a howto structure. */
940 riscv_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
941 bfd_reloc_code_real_type code
)
945 for (i
= 0; i
< ARRAY_SIZE (riscv_reloc_map
); i
++)
946 if (riscv_reloc_map
[i
].bfd_val
== code
)
947 return &howto_table
[(int) riscv_reloc_map
[i
].elf_val
];
949 bfd_set_error (bfd_error_bad_value
);
954 riscv_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
, const char *r_name
)
958 for (i
= 0; i
< ARRAY_SIZE (howto_table
); i
++)
959 if (howto_table
[i
].name
&& strcasecmp (howto_table
[i
].name
, r_name
) == 0)
960 return &howto_table
[i
];
966 riscv_elf_rtype_to_howto (bfd
*abfd
, unsigned int r_type
)
968 if (r_type
>= ARRAY_SIZE (howto_table
))
970 (*_bfd_error_handler
) (_("%pB: unsupported relocation type %#x"),
972 bfd_set_error (bfd_error_bad_value
);
975 return &howto_table
[r_type
];
978 /* Special_function of RISCV_ADD and RISCV_SUB relocations. */
980 static bfd_reloc_status_type
981 riscv_elf_add_sub_reloc (bfd
*abfd
,
982 arelent
*reloc_entry
,
985 asection
*input_section
,
987 char **error_message ATTRIBUTE_UNUSED
)
989 reloc_howto_type
*howto
= reloc_entry
->howto
;
992 if (output_bfd
!= NULL
993 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
994 && (!reloc_entry
->howto
->partial_inplace
|| reloc_entry
->addend
== 0))
996 reloc_entry
->address
+= input_section
->output_offset
;
1000 if (output_bfd
!= NULL
)
1001 return bfd_reloc_continue
;
1003 relocation
= symbol
->value
+ symbol
->section
->output_section
->vma
1004 + symbol
->section
->output_offset
+ reloc_entry
->addend
;
1005 bfd_vma old_value
= bfd_get (howto
->bitsize
, abfd
,
1006 data
+ reloc_entry
->address
);
1008 switch (howto
->type
)
1014 relocation
= old_value
+ relocation
;
1021 relocation
= old_value
- relocation
;
1024 bfd_put (howto
->bitsize
, abfd
, relocation
, data
+ reloc_entry
->address
);
1026 return bfd_reloc_ok
;
1029 /* Always add the IMPLICIT for the SUBSET. */
1032 check_implicit_always (const char *implicit ATTRIBUTE_UNUSED
,
1033 riscv_subset_t
*subset ATTRIBUTE_UNUSED
)
1038 /* Add the IMPLICIT only when the version of SUBSET less than 2.1. */
1041 check_implicit_for_i (const char *implicit ATTRIBUTE_UNUSED
,
1042 riscv_subset_t
*subset
)
1044 return (subset
->major_version
< 2
1045 || (subset
->major_version
== 2
1046 && subset
->minor_version
< 1));
1049 /* Record all implicit information for the subsets. */
1050 struct riscv_implicit_subset
1052 const char *subset_name
;
1053 const char *implicit_name
;
1054 /* A function to determine if we need to add the implicit subset. */
1055 bool (*check_func
) (const char *, riscv_subset_t
*);
1057 static struct riscv_implicit_subset riscv_implicit_subsets
[] =
1059 {"e", "i", check_implicit_always
},
1060 {"i", "zicsr", check_implicit_for_i
},
1061 {"i", "zifencei", check_implicit_for_i
},
1062 {"g", "zicsr", check_implicit_always
},
1063 {"g", "zifencei", check_implicit_always
},
1064 {"q", "d", check_implicit_always
},
1065 {"d", "f", check_implicit_always
},
1066 {"f", "zicsr", check_implicit_always
},
1070 /* Lists of prefixed class extensions that binutils should know about.
1071 Whether or not a particular entry is in these lists will dictate if
1072 gas/ld will accept its presence in the architecture string.
1074 Please add the extensions to the lists in lower case. However, keep
1075 these subsets in alphabetical order in these tables is recommended,
1076 although there is no impact on the current implementation. */
1078 static const char * const riscv_std_z_ext_strtab
[] =
1080 "zba", "zbb", "zbc", "zicsr", "zifencei", "zihintpause", NULL
1083 static const char * const riscv_std_s_ext_strtab
[] =
1088 static const char * const riscv_std_h_ext_strtab
[] =
1093 static const char * const riscv_std_zxm_ext_strtab
[] =
1098 /* ISA extension prefixed name class. Must define them in parsing order. */
1099 enum riscv_prefix_ext_class
1106 RV_ISA_CLASS_UNKNOWN
1109 /* Record the strings of the prefixed extensions, and their corresponding
1110 classes. The more letters of the prefix string, the more forward it must
1111 be defined. Otherwise, the riscv_get_prefix_class will map it to the
1113 struct riscv_parse_prefix_config
1115 /* Class of the extension. */
1116 enum riscv_prefix_ext_class
class;
1118 /* Prefix string for error printing and internal parser usage. */
1121 static const struct riscv_parse_prefix_config parse_config
[] =
1123 {RV_ISA_CLASS_ZXM
, "zxm"},
1124 {RV_ISA_CLASS_Z
, "z"},
1125 {RV_ISA_CLASS_S
, "s"},
1126 {RV_ISA_CLASS_H
, "h"},
1127 {RV_ISA_CLASS_X
, "x"},
1128 {RV_ISA_CLASS_UNKNOWN
, NULL
}
1131 /* Get the prefixed name class for the extensions, the class also
1132 means the order of the prefixed extensions. */
1134 static enum riscv_prefix_ext_class
1135 riscv_get_prefix_class (const char *arch
)
1138 while (parse_config
[i
].class != RV_ISA_CLASS_UNKNOWN
)
1140 if (strncmp (arch
, parse_config
[i
].prefix
,
1141 strlen (parse_config
[i
].prefix
)) == 0)
1142 return parse_config
[i
].class;
1145 return RV_ISA_CLASS_UNKNOWN
;
1148 /* Check KNOWN_EXTS to see if the EXT is supported. */
1151 riscv_known_prefixed_ext (const char *ext
,
1152 const char *const *known_exts
)
1155 for (i
= 0; known_exts
[i
]; ++i
)
1156 if (strcmp (ext
, known_exts
[i
]) == 0)
1161 /* Check whether the prefixed extension is valid or not. Return
1162 true if valid, otehrwise return false. */
1165 riscv_valid_prefixed_ext (const char *ext
)
1167 enum riscv_prefix_ext_class
class = riscv_get_prefix_class (ext
);
1170 case RV_ISA_CLASS_Z
:
1171 return riscv_known_prefixed_ext (ext
, riscv_std_z_ext_strtab
);
1172 case RV_ISA_CLASS_ZXM
:
1173 return riscv_known_prefixed_ext (ext
, riscv_std_zxm_ext_strtab
);
1174 case RV_ISA_CLASS_S
:
1175 return riscv_known_prefixed_ext (ext
, riscv_std_s_ext_strtab
);
1176 case RV_ISA_CLASS_H
:
1177 return riscv_known_prefixed_ext (ext
, riscv_std_h_ext_strtab
);
1178 case RV_ISA_CLASS_X
:
1179 /* Only the single x is invalid. */
1180 if (strcmp (ext
, "x") != 0)
1188 /* Array is used to compare the orders of standard extensions quickly. */
1189 static int riscv_ext_order
[26] = {0};
1191 /* Init the riscv_ext_order array. */
1194 riscv_init_ext_order (void)
1196 static bool inited
= false;
1197 const char *std_base_exts
= "eig";
1198 const char *std_remain_exts
= riscv_supported_std_ext ();
1205 /* The orders of all standard extensions are positive. */
1208 /* Init the standard base extensions first. */
1209 for (ext
= std_base_exts
; *ext
; ext
++)
1210 riscv_ext_order
[(*ext
- 'a')] = order
++;
1212 /* Init the standard remaining extensions. */
1213 for (ext
= std_remain_exts
; *ext
; ext
++)
1214 riscv_ext_order
[(*ext
- 'a')] = order
++;
1216 /* Some of the prefixed keyword are not single letter, so we set
1217 their prefixed orders in the riscv_compare_subsets directly,
1218 not through the riscv_ext_order. */
1223 /* Similar to the strcmp. It returns an integer less than, equal to,
1224 or greater than zero if `subset2` is found, respectively, to be less
1225 than, to match, or be greater than `subset1`.
1228 Zero: Preserved keywords.
1229 Positive number: Standard extensions.
1230 Negative number: Prefixed keywords. */
1233 riscv_compare_subsets (const char *subset1
, const char *subset2
)
1235 int order1
= riscv_ext_order
[(*subset1
- 'a')];
1236 int order2
= riscv_ext_order
[(*subset2
- 'a')];
1238 /* Compare the standard extension first. */
1239 if (order1
> 0 && order2
> 0)
1240 return order1
- order2
;
1242 /* Set the prefixed orders to negative numbers. */
1243 enum riscv_prefix_ext_class class1
= riscv_get_prefix_class (subset1
);
1244 enum riscv_prefix_ext_class class2
= riscv_get_prefix_class (subset2
);
1246 if (class1
!= RV_ISA_CLASS_UNKNOWN
)
1247 order1
= - (int) class1
;
1248 if (class2
!= RV_ISA_CLASS_UNKNOWN
)
1249 order2
= - (int) class2
;
1251 if (order1
== order2
)
1253 /* Compare the standard addition z extensions. */
1254 if (class1
== RV_ISA_CLASS_Z
)
1256 order1
= riscv_ext_order
[(*++subset1
- 'a')];
1257 order2
= riscv_ext_order
[(*++subset2
- 'a')];
1258 if (order1
!= order2
)
1259 return order1
- order2
;
1261 return strcasecmp (++subset1
, ++subset2
);
1264 return order2
- order1
;
1267 /* Find subset in the list. Return TRUE and set `current` to the subset
1268 if it is found. Otherwise, return FALSE and set `current` to the place
1269 where we should insert the subset. However, return FALSE with the NULL
1270 `current` means we should insert the subset at the head of subset list,
1274 riscv_lookup_subset (const riscv_subset_list_t
*subset_list
,
1276 riscv_subset_t
**current
)
1278 riscv_subset_t
*s
, *pre_s
= NULL
;
1280 for (s
= subset_list
->head
;
1282 pre_s
= s
, s
= s
->next
)
1284 int cmp
= riscv_compare_subsets (s
->name
, subset
);
1297 /* Add extension from ISA string to the last of the subset list. */
1300 riscv_add_subset (riscv_subset_list_t
*subset_list
,
1305 riscv_subset_t
*s
= xmalloc (sizeof *s
);
1307 if (subset_list
->head
== NULL
)
1308 subset_list
->head
= s
;
1310 s
->name
= xstrdup (subset
);
1311 s
->major_version
= major
;
1312 s
->minor_version
= minor
;
1315 if (subset_list
->tail
!= NULL
)
1316 subset_list
->tail
->next
= s
;
1317 subset_list
->tail
= s
;
1320 /* Add the implicit extension to the subset list. Search the
1321 list first, and then find the right place to add. */
1324 riscv_add_implicit_subset (riscv_subset_list_t
*subset_list
,
1329 riscv_subset_t
*current
, *new;
1331 if (riscv_lookup_subset (subset_list
, subset
, ¤t
))
1334 new = xmalloc (sizeof *new);
1335 new->name
= xstrdup (subset
);
1336 new->major_version
= major
;
1337 new->minor_version
= minor
;
1340 if (current
!= NULL
)
1342 new->next
= current
->next
;
1343 current
->next
= new;
1347 new->next
= subset_list
->head
;
1348 subset_list
->head
= new;
1352 /* We have to add all extensions from ISA string first, and then start to
1353 add their implicit extensions. The extensions from ISA string must be
1354 set in order, so we can add them to the last of the subset list
1355 directly, without searching.
1357 Find the default versions for the extension before adding them to
1358 the subset list, if their versions are RISCV_UNKNOWN_VERSION.
1359 Afterwards, report errors if we can not find their default versions. */
1362 riscv_parse_add_subset (riscv_parse_subset_t
*rps
,
1368 int major_version
= major
;
1369 int minor_version
= minor
;
1371 if ((major_version
== RISCV_UNKNOWN_VERSION
1372 || minor_version
== RISCV_UNKNOWN_VERSION
)
1373 && rps
->get_default_version
!= NULL
)
1374 rps
->get_default_version (subset
, &major_version
, &minor_version
);
1376 /* We don't care the versions of the implicit extensions. */
1378 && (major_version
== RISCV_UNKNOWN_VERSION
1379 || minor_version
== RISCV_UNKNOWN_VERSION
))
1381 if (subset
[0] == 'x')
1383 (_("x ISA extension `%s' must be set with the versions"),
1387 (_("cannot find default versions of the ISA extension `%s'"),
1393 riscv_add_subset (rps
->subset_list
, subset
,
1394 major_version
, minor_version
);
1396 riscv_add_implicit_subset (rps
->subset_list
, subset
,
1397 major_version
, minor_version
);
1400 /* Release subset list. */
1403 riscv_release_subset_list (riscv_subset_list_t
*subset_list
)
1405 while (subset_list
->head
!= NULL
)
1407 riscv_subset_t
*next
= subset_list
->head
->next
;
1408 free ((void *)subset_list
->head
->name
);
1409 free (subset_list
->head
);
1410 subset_list
->head
= next
;
1413 subset_list
->tail
= NULL
;
1416 /* Parsing extension version.
1419 Points to the end of version
1422 `rps`: Hooks and status for parsing extensions.
1423 `march`: Full ISA string.
1424 `p`: Curent parsing position.
1425 `major_version`: Parsed major version.
1426 `minor_version`: Parsed minor version.
1427 `std_ext_p`: True if parsing standard extension. */
1430 riscv_parsing_subset_version (riscv_parse_subset_t
*rps
,
1437 bool major_p
= true;
1451 /* Might be beginning of `p` extension. */
1454 *major_version
= version
;
1461 (_("-march=%s: expect number after `%dp'"),
1467 *major_version
= version
;
1471 else if (ISDIGIT (*p
))
1472 version
= (version
* 10) + (*p
- '0');
1478 *major_version
= version
;
1480 *minor_version
= version
;
1482 /* We can not find any version in string. */
1483 if (*major_version
== 0 && *minor_version
== 0)
1485 *major_version
= RISCV_UNKNOWN_VERSION
;
1486 *minor_version
= RISCV_UNKNOWN_VERSION
;
1492 /* Return string which contain all supported standard extensions in
1496 riscv_supported_std_ext (void)
1498 return "mafdqlcbjtpvn";
1501 /* Parsing function for standard extensions.
1504 Points to the end of extensions.
1507 `rps`: Hooks and status for parsing extensions.
1508 `march`: Full ISA string.
1509 `p`: Curent parsing position. */
1512 riscv_parse_std_ext (riscv_parse_subset_t
*rps
,
1516 const char *all_std_exts
= riscv_supported_std_ext ();
1517 const char *std_exts
= all_std_exts
;
1520 char subset
[2] = {0, 0};
1522 /* First letter must start with i, e or g. */
1526 p
= riscv_parsing_subset_version (rps
, march
, ++p
,
1528 &minor_version
, true);
1529 riscv_parse_add_subset (rps
, "i",
1531 minor_version
, false);
1535 p
= riscv_parsing_subset_version (rps
, march
, ++p
,
1537 &minor_version
, true);
1538 riscv_parse_add_subset (rps
, "e",
1540 minor_version
, false);
1541 if (*rps
->xlen
> 32)
1544 (_("-march=%s: rv%de is not a valid base ISA"),
1551 p
= riscv_parsing_subset_version (rps
, march
, ++p
,
1553 &minor_version
, true);
1554 /* Expand g to imafd. */
1555 riscv_parse_add_subset (rps
, "i",
1556 RISCV_UNKNOWN_VERSION
,
1557 RISCV_UNKNOWN_VERSION
, false);
1558 for ( ; *std_exts
!= 'q'; std_exts
++)
1560 subset
[0] = *std_exts
;
1561 riscv_parse_add_subset (rps
, subset
,
1562 RISCV_UNKNOWN_VERSION
,
1563 RISCV_UNKNOWN_VERSION
, false);
1565 /* Add g as an implicit extension. */
1566 riscv_parse_add_subset (rps
, "g",
1567 RISCV_UNKNOWN_VERSION
,
1568 RISCV_UNKNOWN_VERSION
, true);
1573 (_("-march=%s: first ISA extension must be `e', `i' or `g'"),
1578 while (p
!= NULL
&& *p
!= '\0')
1580 /* Stop when we parsed the known prefix class. */
1581 enum riscv_prefix_ext_class
class = riscv_get_prefix_class (p
);
1582 if (class != RV_ISA_CLASS_UNKNOWN
)
1591 /* Checking canonical order. */
1593 while (*std_exts
&& std_ext
!= *std_exts
)
1596 if (std_ext
!= *std_exts
)
1598 if (riscv_ext_order
[(std_ext
- 'a')] == 0)
1600 (_("-march=%s: unknown standard and prefixed ISA "
1601 "extension `%s'"), march
, p
);
1604 (_("-march=%s: standard ISA extension `%c' is not "
1605 "in canonical order"), march
, std_ext
);
1610 subset
[0] = std_ext
;
1611 p
= riscv_parsing_subset_version (rps
, march
, ++p
,
1613 &minor_version
, true);
1614 riscv_parse_add_subset (rps
, subset
,
1616 minor_version
, false);
1622 /* Parsing function for prefixed extensions.
1625 Points to the end of extension.
1628 `rps`: Hooks and status for parsing extensions.
1629 `march`: Full ISA string.
1630 `p`: Curent parsing position. */
1633 riscv_parse_prefixed_ext (riscv_parse_subset_t
*rps
,
1639 const char *last_name
;
1640 enum riscv_prefix_ext_class
class;
1650 class = riscv_get_prefix_class (p
);
1651 if (class == RV_ISA_CLASS_UNKNOWN
)
1654 (_("-march=%s: unknown prefix class for the ISA extension `%s'"),
1659 char *subset
= xstrdup (p
);
1661 const char *end_of_version
;
1663 while (*++q
!= '\0' && *q
!= '_' && !ISDIGIT (*q
))
1667 riscv_parsing_subset_version (rps
, march
, q
,
1669 &minor_version
, false);
1672 if (end_of_version
== NULL
)
1678 /* Check if the prefix extension is known.
1679 For 'x', anything goes but it cannot simply be 'x'.
1680 For other prefixed extensions, it must be known from a list
1681 and cannot simply be the prefixed name. */
1683 /* Check that the extension name is well-formed. */
1684 if (rps
->check_unknown_prefixed_ext
1685 && !riscv_valid_prefixed_ext (subset
))
1688 (_("-march=%s: unknown prefixed ISA extension `%s'"),
1694 /* Check that the extension isn't duplicate. */
1695 last_name
= rps
->subset_list
->tail
->name
;
1696 if (!strcasecmp (last_name
, subset
))
1699 (_("-march=%s: duplicate prefixed ISA extension `%s'"),
1705 /* Check that the extension is in expected order. */
1706 if (riscv_compare_subsets (last_name
, subset
) > 0)
1709 (_("-march=%s: prefixed ISA extension `%s' is not in expected "
1710 "order. It must come before `%s'"),
1711 march
, subset
, last_name
);
1716 riscv_parse_add_subset (rps
, subset
,
1718 minor_version
, false);
1719 p
+= end_of_version
- subset
;
1722 if (*p
!= '\0' && *p
!= '_')
1725 (_("-march=%s: prefixed ISA extension must separate with _"),
1734 /* Add the implicit extensions. */
1737 riscv_parse_add_implicit_subsets (riscv_parse_subset_t
*rps
)
1739 struct riscv_implicit_subset
*t
= riscv_implicit_subsets
;
1740 for (; t
->subset_name
; t
++)
1742 riscv_subset_t
*subset
= NULL
;
1743 if (riscv_lookup_subset (rps
->subset_list
, t
->subset_name
, &subset
)
1744 && t
->check_func (t
->implicit_name
, subset
))
1745 riscv_parse_add_subset (rps
, t
->implicit_name
,
1746 RISCV_UNKNOWN_VERSION
,
1747 RISCV_UNKNOWN_VERSION
, true);
1751 /* Function for parsing ISA string.
1754 Return TRUE on success.
1757 `rps`: Hooks and status for parsing extensions.
1758 `arch`: Full ISA string. */
1761 riscv_parse_subset (riscv_parse_subset_t
*rps
,
1764 riscv_subset_t
*subset
= NULL
;
1766 bool no_conflict
= true;
1768 for (p
= arch
; *p
!= '\0'; p
++)
1773 (_("-march=%s: ISA string cannot contain uppercase letters"),
1780 if (startswith (p
, "rv32"))
1785 else if (startswith (p
, "rv64"))
1792 /* ISA string shouldn't be NULL or empty here. However,
1793 it might be empty only when we failed to merge the ISA
1794 string in the riscv_merge_attributes. We have already
1795 issued the correct error message in another side, so do
1796 not issue this error when the ISA string is empty. */
1798 rps
->error_handler (
1799 _("-march=%s: ISA string must begin with rv32 or rv64"),
1804 /* Init the riscv_ext_order array to compare the order of extensions
1806 riscv_init_ext_order ();
1808 /* Parsing standard extension. */
1809 p
= riscv_parse_std_ext (rps
, arch
, p
);
1814 /* Parse the different classes of extensions in the specified order. */
1817 p
= riscv_parse_prefixed_ext (rps
, arch
, p
);
1823 /* Finally add implicit extensions according to the current
1825 riscv_parse_add_implicit_subsets (rps
);
1827 /* Check the conflicts. */
1828 if (riscv_lookup_subset (rps
->subset_list
, "e", &subset
)
1829 && riscv_lookup_subset (rps
->subset_list
, "f", &subset
))
1832 (_("-march=%s: rv32e does not support the `f' extension"),
1834 no_conflict
= false;
1836 if (riscv_lookup_subset (rps
->subset_list
, "q", &subset
)
1840 (_("-march=%s: rv32 does not support the `q' extension"),
1842 no_conflict
= false;
1847 /* Return the number of digits for the input. */
1850 riscv_estimate_digit (unsigned num
)
1856 for (digit
= 0; num
; num
/= 10)
1862 /* Auxiliary function to estimate string length of subset list. */
1865 riscv_estimate_arch_strlen1 (const riscv_subset_t
*subset
)
1868 return 6; /* For rv32/rv64/rv128 and string terminator. */
1870 return riscv_estimate_arch_strlen1 (subset
->next
)
1871 + strlen (subset
->name
)
1872 + riscv_estimate_digit (subset
->major_version
)
1873 + 1 /* For version seperator 'p'. */
1874 + riscv_estimate_digit (subset
->minor_version
)
1875 + 1 /* For underscore. */;
1878 /* Estimate the string length of this subset list. */
1881 riscv_estimate_arch_strlen (const riscv_subset_list_t
*subset_list
)
1883 return riscv_estimate_arch_strlen1 (subset_list
->head
);
1886 /* Auxiliary function to convert subset info to string. */
1889 riscv_arch_str1 (riscv_subset_t
*subset
,
1890 char *attr_str
, char *buf
, size_t bufsz
)
1892 const char *underline
= "_";
1893 riscv_subset_t
*subset_t
= subset
;
1895 if (subset_t
== NULL
)
1898 /* No underline between rvXX and i/e. */
1899 if ((strcasecmp (subset_t
->name
, "i") == 0)
1900 || (strcasecmp (subset_t
->name
, "e") == 0))
1903 snprintf (buf
, bufsz
, "%s%s%dp%d",
1906 subset_t
->major_version
,
1907 subset_t
->minor_version
);
1909 strncat (attr_str
, buf
, bufsz
);
1911 /* Skip 'i' extension after 'e', or skip extensions which
1912 versions are unknown. */
1913 while (subset_t
->next
1914 && ((strcmp (subset_t
->name
, "e") == 0
1915 && strcmp (subset_t
->next
->name
, "i") == 0)
1916 || subset_t
->next
->major_version
== RISCV_UNKNOWN_VERSION
1917 || subset_t
->next
->minor_version
== RISCV_UNKNOWN_VERSION
))
1918 subset_t
= subset_t
->next
;
1920 riscv_arch_str1 (subset_t
->next
, attr_str
, buf
, bufsz
);
1923 /* Convert subset information into string with explicit versions. */
1926 riscv_arch_str (unsigned xlen
, const riscv_subset_list_t
*subset
)
1928 size_t arch_str_len
= riscv_estimate_arch_strlen (subset
);
1929 char *attr_str
= xmalloc (arch_str_len
);
1930 char *buf
= xmalloc (arch_str_len
);
1932 snprintf (attr_str
, arch_str_len
, "rv%u", xlen
);
1934 riscv_arch_str1 (subset
->head
, attr_str
, buf
, arch_str_len
);