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
12 struct 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
20 struct 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
59 const char *get_arch_regstr(unsigned int n)
60 {
61 return (n < RISCV_MAX_REGS) ? riscv_dwarf_regs_table[n].name : NULL;
62 }
63
64 int 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
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