1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
4 * Mapping of DWARF debug register numbers into register names.
5 */
6
7#include <stddef.h>
8#include <errno.h> /* for EINVAL */
9#include <string.h> /* for strcmp */
10#include <dwarf-regs.h>
11
12struct pt_regs_dwarfnum {
13	const char *name;
14	unsigned int dwarfnum;
15};
16
17#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
18#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
19
20struct pt_regs_dwarfnum riscv_dwarf_regs_table[] = {
21	REG_DWARFNUM_NAME("%zero", 0),
22	REG_DWARFNUM_NAME("%ra", 1),
23	REG_DWARFNUM_NAME("%sp", 2),
24	REG_DWARFNUM_NAME("%gp", 3),
25	REG_DWARFNUM_NAME("%tp", 4),
26	REG_DWARFNUM_NAME("%t0", 5),
27	REG_DWARFNUM_NAME("%t1", 6),
28	REG_DWARFNUM_NAME("%t2", 7),
29	REG_DWARFNUM_NAME("%s0", 8),
30	REG_DWARFNUM_NAME("%s1", 9),
31	REG_DWARFNUM_NAME("%a0", 10),
32	REG_DWARFNUM_NAME("%a1", 11),
33	REG_DWARFNUM_NAME("%a2", 12),
34	REG_DWARFNUM_NAME("%a3", 13),
35	REG_DWARFNUM_NAME("%a4", 14),
36	REG_DWARFNUM_NAME("%a5", 15),
37	REG_DWARFNUM_NAME("%a6", 16),
38	REG_DWARFNUM_NAME("%a7", 17),
39	REG_DWARFNUM_NAME("%s2", 18),
40	REG_DWARFNUM_NAME("%s3", 19),
41	REG_DWARFNUM_NAME("%s4", 20),
42	REG_DWARFNUM_NAME("%s5", 21),
43	REG_DWARFNUM_NAME("%s6", 22),
44	REG_DWARFNUM_NAME("%s7", 23),
45	REG_DWARFNUM_NAME("%s8", 24),
46	REG_DWARFNUM_NAME("%s9", 25),
47	REG_DWARFNUM_NAME("%s10", 26),
48	REG_DWARFNUM_NAME("%s11", 27),
49	REG_DWARFNUM_NAME("%t3", 28),
50	REG_DWARFNUM_NAME("%t4", 29),
51	REG_DWARFNUM_NAME("%t5", 30),
52	REG_DWARFNUM_NAME("%t6", 31),
53	REG_DWARFNUM_END,
54};
55
56#define RISCV_MAX_REGS ((sizeof(riscv_dwarf_regs_table) / \
57		 sizeof(riscv_dwarf_regs_table[0])) - 1)
58
59const char *get_arch_regstr(unsigned int n)
60{
61	return (n < RISCV_MAX_REGS) ? riscv_dwarf_regs_table[n].name : NULL;
62}
63
64int regs_query_register_offset(const char *name)
65{
66	const struct pt_regs_dwarfnum *roff;
67
68	for (roff = riscv_dwarf_regs_table; roff->name; roff++)
69		if (!strcmp(roff->name, name))
70			return roff->dwarfnum;
71	return -EINVAL;
72}
73