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
16struct 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 */
31static 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 */
81const 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