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
21 struct 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 */
36 static 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 */
get_arch_regstr(unsigned int n)64 const 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