]>
Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
eb668c6d WD |
2 | /* |
3 | * Mapping of DWARF debug register numbers into register names. | |
4 | * | |
5 | * Copyright (C) 2010 Will Deacon, ARM Ltd. | |
eb668c6d WD |
6 | */ |
7 | ||
861e10be | 8 | #include <stddef.h> |
aa8cc2f6 | 9 | #include <linux/stringify.h> |
eb668c6d WD |
10 | #include <dwarf-regs.h> |
11 | ||
12 | struct pt_regs_dwarfnum { | |
13 | const char *name; | |
14 | unsigned int dwarfnum; | |
15 | }; | |
16 | ||
eb668c6d WD |
17 | #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} |
18 | #define GPR_DWARFNUM_NAME(num) \ | |
aa8cc2f6 | 19 | {.name = __stringify(%r##num), .dwarfnum = num} |
eb668c6d WD |
20 | #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} |
21 | ||
22 | /* | |
23 | * Reference: | |
24 | * http://infocenter.arm.com/help/topic/com.arm.doc.ihi0040a/IHI0040A_aadwarf.pdf | |
25 | */ | |
26 | static const struct pt_regs_dwarfnum regdwarfnum_table[] = { | |
27 | GPR_DWARFNUM_NAME(0), | |
28 | GPR_DWARFNUM_NAME(1), | |
29 | GPR_DWARFNUM_NAME(2), | |
30 | GPR_DWARFNUM_NAME(3), | |
31 | GPR_DWARFNUM_NAME(4), | |
32 | GPR_DWARFNUM_NAME(5), | |
33 | GPR_DWARFNUM_NAME(6), | |
34 | GPR_DWARFNUM_NAME(7), | |
35 | GPR_DWARFNUM_NAME(8), | |
36 | GPR_DWARFNUM_NAME(9), | |
37 | GPR_DWARFNUM_NAME(10), | |
38 | REG_DWARFNUM_NAME("%fp", 11), | |
39 | REG_DWARFNUM_NAME("%ip", 12), | |
40 | REG_DWARFNUM_NAME("%sp", 13), | |
41 | REG_DWARFNUM_NAME("%lr", 14), | |
42 | REG_DWARFNUM_NAME("%pc", 15), | |
43 | REG_DWARFNUM_END, | |
44 | }; | |
45 | ||
46 | /** | |
47 | * get_arch_regstr() - lookup register name from it's DWARF register number | |
48 | * @n: the DWARF register number | |
49 | * | |
50 | * get_arch_regstr() returns the name of the register in struct | |
51 | * regdwarfnum_table from it's DWARF register number. If the register is not | |
52 | * found in the table, this returns NULL; | |
53 | */ | |
54 | const char *get_arch_regstr(unsigned int n) | |
55 | { | |
56 | const struct pt_regs_dwarfnum *roff; | |
57 | for (roff = regdwarfnum_table; roff->name != NULL; roff++) | |
58 | if (roff->dwarfnum == n) | |
59 | return roff->name; | |
60 | return NULL; | |
61 | } |