1/*
2 * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
3 * Extracted from probe-finder.c
4 *
5 * Written by Masami Hiramatsu <mhiramat@redhat.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 *
21 */
22
23#include <stddef.h>
24#include <dwarf-regs.h>
25
26/*
27 * Generic dwarf analysis helpers
28 */
29
30#define X86_32_MAX_REGS 8
31const char *x86_32_regs_table[X86_32_MAX_REGS] = {
32	"%ax",
33	"%cx",
34	"%dx",
35	"%bx",
36	"$stack",	/* Stack address instead of %sp */
37	"%bp",
38	"%si",
39	"%di",
40};
41
42#define X86_64_MAX_REGS 16
43const char *x86_64_regs_table[X86_64_MAX_REGS] = {
44	"%ax",
45	"%dx",
46	"%cx",
47	"%bx",
48	"%si",
49	"%di",
50	"%bp",
51	"%sp",
52	"%r8",
53	"%r9",
54	"%r10",
55	"%r11",
56	"%r12",
57	"%r13",
58	"%r14",
59	"%r15",
60};
61
62/* TODO: switching by dwarf address size */
63#ifdef __x86_64__
64#define ARCH_MAX_REGS X86_64_MAX_REGS
65#define arch_regs_table x86_64_regs_table
66#else
67#define ARCH_MAX_REGS X86_32_MAX_REGS
68#define arch_regs_table x86_32_regs_table
69#endif
70
71/* Return architecture dependent register string (for kprobe-tracer) */
72const char *get_arch_regstr(unsigned int n)
73{
74	return (n <= ARCH_MAX_REGS) ? arch_regs_table[n] : NULL;
75}
76