dwarf-regs.c revision e6817ec1d8ab31fc7b01906e305f848542df6413 
1/*
2 * Mapping of DWARF debug register numbers into register names.
3 *
4 * Copyright (C) 2010 Will Deacon, ARM Ltd.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11/* ANDROID_CHANGE_BEGIN */
12#if 0
13#include <libio.h>
14#include <dwarf-regs.h>
15#else
16#include <stdio.h>
17#include "util/include/dwarf-regs.h"
18#endif
19/* ANDROID_CHANGE_END */
20
21struct pt_regs_dwarfnum {
22	const char *name;
23	unsigned int dwarfnum;
24};
25
26#define STR(s) #s
27#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
28#define GPR_DWARFNUM_NAME(num) \
29	{.name = STR(%r##num), .dwarfnum = num}
30#define REG_DWARFNUM_END {.name = 0, .dwarfnum = 0}
31
32/*
33 * Reference:
34 * http://infocenter.arm.com/help/topic/com.arm.doc.ihi0040a/IHI0040A_aadwarf.pdf
35 */
36static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
37	GPR_DWARFNUM_NAME(0),
38	GPR_DWARFNUM_NAME(1),
39	GPR_DWARFNUM_NAME(2),
40	GPR_DWARFNUM_NAME(3),
41	GPR_DWARFNUM_NAME(4),
42	GPR_DWARFNUM_NAME(5),
43	GPR_DWARFNUM_NAME(6),
44	GPR_DWARFNUM_NAME(7),
45	GPR_DWARFNUM_NAME(8),
46	GPR_DWARFNUM_NAME(9),
47	GPR_DWARFNUM_NAME(10),
48	REG_DWARFNUM_NAME("%fp", 11),
49	REG_DWARFNUM_NAME("%ip", 12),
50	REG_DWARFNUM_NAME("%sp", 13),
51	REG_DWARFNUM_NAME("%lr", 14),
52	REG_DWARFNUM_NAME("%pc", 15),
53	REG_DWARFNUM_END,
54};
55
56/**
57 * get_arch_regstr() - lookup register name from it's DWARF register number
58 * @n:	the DWARF register number
59 *
60 * get_arch_regstr() returns the name of the register in struct
61 * regdwarfnum_table from it's DWARF register number. If the register is not
62 * found in the table, this returns NULL;
63 */
64const char *get_arch_regstr(unsigned int n)
65{
66	const struct pt_regs_dwarfnum *roff;
67	for (roff = regdwarfnum_table; roff->name != NULL; roff++)
68		if (roff->dwarfnum == n)
69			return roff->name;
70	return NULL;
71}
72