xref: /openbmc/linux/tools/perf/arch/x86/util/dwarf-regs.c (revision c819e2cf)
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
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) */
72 const char *get_arch_regstr(unsigned int n)
73 {
74 	return (n <= ARCH_MAX_REGS) ? arch_regs_table[n] : NULL;
75 }
76