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 <libio.h>
24 #include <dwarf-regs.h>
25
26 /*
27 * Generic dwarf analysis helpers
28 */
29
30 #define X86_32_MAX_REGS 8
31 const 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
43 const 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) */
get_arch_regstr(unsigned int n)72 const char *get_arch_regstr(unsigned int n)
73 {
74 return (n <= ARCH_MAX_REGS) ? arch_regs_table[n] : NULL;
75 }
76