Linux Kernel  3.7.1
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dwarf-regs.c
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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 <[email protected]>
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
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
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 }