]>
Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
8ab596af JP |
2 | /* |
3 | * Mapping of DWARF debug register numbers into register names. | |
4 | * | |
5 | * Copyright (C) 2010 Will Deacon, ARM Ltd. | |
8ab596af JP |
6 | */ |
7 | ||
a43783ae | 8 | #include <errno.h> |
8ab596af | 9 | #include <stddef.h> |
7a8ef4c4 | 10 | #include <string.h> |
8ab596af | 11 | #include <dwarf-regs.h> |
3bb53c9f | 12 | #include <linux/ptrace.h> /* for struct user_pt_regs */ |
aa8cc2f6 | 13 | #include <linux/stringify.h> |
3bb53c9f | 14 | #include "util.h" |
8ab596af JP |
15 | |
16 | struct pt_regs_dwarfnum { | |
17 | const char *name; | |
18 | unsigned int dwarfnum; | |
19 | }; | |
20 | ||
8ab596af JP |
21 | #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} |
22 | #define GPR_DWARFNUM_NAME(num) \ | |
aa8cc2f6 | 23 | {.name = __stringify(%x##num), .dwarfnum = num} |
8ab596af | 24 | #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} |
3bb53c9f HK |
25 | #define DWARFNUM2OFFSET(index) \ |
26 | (index * sizeof((struct user_pt_regs *)0)->regs[0]) | |
8ab596af JP |
27 | |
28 | /* | |
29 | * Reference: | |
30 | * http://infocenter.arm.com/help/topic/com.arm.doc.ihi0057b/IHI0057B_aadwarf64.pdf | |
31 | */ | |
32 | static const struct pt_regs_dwarfnum regdwarfnum_table[] = { | |
33 | GPR_DWARFNUM_NAME(0), | |
34 | GPR_DWARFNUM_NAME(1), | |
35 | GPR_DWARFNUM_NAME(2), | |
36 | GPR_DWARFNUM_NAME(3), | |
37 | GPR_DWARFNUM_NAME(4), | |
38 | GPR_DWARFNUM_NAME(5), | |
39 | GPR_DWARFNUM_NAME(6), | |
40 | GPR_DWARFNUM_NAME(7), | |
41 | GPR_DWARFNUM_NAME(8), | |
42 | GPR_DWARFNUM_NAME(9), | |
43 | GPR_DWARFNUM_NAME(10), | |
44 | GPR_DWARFNUM_NAME(11), | |
45 | GPR_DWARFNUM_NAME(12), | |
46 | GPR_DWARFNUM_NAME(13), | |
47 | GPR_DWARFNUM_NAME(14), | |
48 | GPR_DWARFNUM_NAME(15), | |
49 | GPR_DWARFNUM_NAME(16), | |
50 | GPR_DWARFNUM_NAME(17), | |
51 | GPR_DWARFNUM_NAME(18), | |
52 | GPR_DWARFNUM_NAME(19), | |
53 | GPR_DWARFNUM_NAME(20), | |
54 | GPR_DWARFNUM_NAME(21), | |
55 | GPR_DWARFNUM_NAME(22), | |
56 | GPR_DWARFNUM_NAME(23), | |
57 | GPR_DWARFNUM_NAME(24), | |
58 | GPR_DWARFNUM_NAME(25), | |
59 | GPR_DWARFNUM_NAME(26), | |
60 | GPR_DWARFNUM_NAME(27), | |
61 | GPR_DWARFNUM_NAME(28), | |
62 | GPR_DWARFNUM_NAME(29), | |
63 | REG_DWARFNUM_NAME("%lr", 30), | |
64 | REG_DWARFNUM_NAME("%sp", 31), | |
65 | REG_DWARFNUM_END, | |
66 | }; | |
67 | ||
68 | /** | |
69 | * get_arch_regstr() - lookup register name from it's DWARF register number | |
70 | * @n: the DWARF register number | |
71 | * | |
72 | * get_arch_regstr() returns the name of the register in struct | |
73 | * regdwarfnum_table from it's DWARF register number. If the register is not | |
74 | * found in the table, this returns NULL; | |
75 | */ | |
76 | const char *get_arch_regstr(unsigned int n) | |
77 | { | |
78 | const struct pt_regs_dwarfnum *roff; | |
79 | for (roff = regdwarfnum_table; roff->name != NULL; roff++) | |
80 | if (roff->dwarfnum == n) | |
81 | return roff->name; | |
82 | return NULL; | |
83 | } | |
3bb53c9f HK |
84 | |
85 | int regs_query_register_offset(const char *name) | |
86 | { | |
87 | const struct pt_regs_dwarfnum *roff; | |
88 | ||
89 | for (roff = regdwarfnum_table; roff->name != NULL; roff++) | |
90 | if (!strcmp(roff->name, name)) | |
91 | return DWARFNUM2OFFSET(roff->dwarfnum); | |
92 | return -EINVAL; | |
93 | } |