1 /*
2 * Mapping of DWARF debug register numbers into register names.
3 *
4 * Copyright (C) 2010 Ian Munsie, IBM Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12 #include <stddef.h>
13 #include <dwarf-regs.h>
14
15
16 struct pt_regs_dwarfnum {
17 const char *name;
18 unsigned int dwarfnum;
19 };
20
21 #define STR(s) #s
22 #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
23 #define GPR_DWARFNUM_NAME(num) \
24 {.name = STR(%gpr##num), .dwarfnum = num}
25 #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
26
27 /*
28 * Reference:
29 * http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html
30 */
31 static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
32 GPR_DWARFNUM_NAME(0),
33 GPR_DWARFNUM_NAME(1),
34 GPR_DWARFNUM_NAME(2),
35 GPR_DWARFNUM_NAME(3),
36 GPR_DWARFNUM_NAME(4),
37 GPR_DWARFNUM_NAME(5),
38 GPR_DWARFNUM_NAME(6),
39 GPR_DWARFNUM_NAME(7),
40 GPR_DWARFNUM_NAME(8),
41 GPR_DWARFNUM_NAME(9),
42 GPR_DWARFNUM_NAME(10),
43 GPR_DWARFNUM_NAME(11),
44 GPR_DWARFNUM_NAME(12),
45 GPR_DWARFNUM_NAME(13),
46 GPR_DWARFNUM_NAME(14),
47 GPR_DWARFNUM_NAME(15),
48 GPR_DWARFNUM_NAME(16),
49 GPR_DWARFNUM_NAME(17),
50 GPR_DWARFNUM_NAME(18),
51 GPR_DWARFNUM_NAME(19),
52 GPR_DWARFNUM_NAME(20),
53 GPR_DWARFNUM_NAME(21),
54 GPR_DWARFNUM_NAME(22),
55 GPR_DWARFNUM_NAME(23),
56 GPR_DWARFNUM_NAME(24),
57 GPR_DWARFNUM_NAME(25),
58 GPR_DWARFNUM_NAME(26),
59 GPR_DWARFNUM_NAME(27),
60 GPR_DWARFNUM_NAME(28),
61 GPR_DWARFNUM_NAME(29),
62 GPR_DWARFNUM_NAME(30),
63 GPR_DWARFNUM_NAME(31),
64 REG_DWARFNUM_NAME("%msr", 66),
65 REG_DWARFNUM_NAME("%ctr", 109),
66 REG_DWARFNUM_NAME("%link", 108),
67 REG_DWARFNUM_NAME("%xer", 101),
68 REG_DWARFNUM_NAME("%dar", 119),
69 REG_DWARFNUM_NAME("%dsisr", 118),
70 REG_DWARFNUM_END,
71 };
72
73 /**
74 * get_arch_regstr() - lookup register name from it's DWARF register number
75 * @n: the DWARF register number
76 *
77 * get_arch_regstr() returns the name of the register in struct
78 * regdwarfnum_table from it's DWARF register number. If the register is not
79 * found in the table, this returns NULL;
80 */
get_arch_regstr(unsigned int n)81 const char *get_arch_regstr(unsigned int n)
82 {
83 const struct pt_regs_dwarfnum *roff;
84 for (roff = regdwarfnum_table; roff->name != NULL; roff++)
85 if (roff->dwarfnum == n)
86 return roff->name;
87 return NULL;
88 }
89