1 /* Register names and numbers for i386 DWARF.
2 Copyright (C) 2005, 2006, 2007 Red Hat, Inc.
3 This file is part of elfutils.
4
5 This file is free software; you can redistribute it and/or modify
6 it under the terms of either
7
8 * the GNU Lesser General Public License as published by the Free
9 Software Foundation; either version 3 of the License, or (at
10 your option) any later version
11
12 or
13
14 * the GNU General Public License as published by the Free
15 Software Foundation; either version 2 of the License, or (at
16 your option) any later version
17
18 or both in parallel, as here.
19
20 elfutils is distributed in the hope that it will be useful, but
21 WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 General Public License for more details.
24
25 You should have received copies of the GNU General Public License and
26 the GNU Lesser General Public License along with this program. If
27 not, see <http://www.gnu.org/licenses/>. */
28
29 #ifdef HAVE_CONFIG_H
30 # include <config.h>
31 #endif
32
33 #include <string.h>
34 #include <dwarf.h>
35
36 #define BACKEND i386_
37 #include "libebl_CPU.h"
38
39 ssize_t
i386_register_info(Ebl * ebl,int regno,char * name,size_t namelen,const char ** prefix,const char ** setname,int * bits,int * type)40 i386_register_info (Ebl *ebl __attribute__ ((unused)),
41 int regno, char *name, size_t namelen,
42 const char **prefix, const char **setname,
43 int *bits, int *type)
44 {
45 if (name == NULL)
46 return 46;
47
48 if (regno < 0 || regno > 45 || namelen < 6)
49 return -1;
50
51 *prefix = "%";
52 *bits = 32;
53 *type = DW_ATE_unsigned;
54 if (regno < 11)
55 {
56 *setname = "integer";
57 if (regno < 9)
58 *type = DW_ATE_signed;
59 }
60 else if (regno < 19)
61 {
62 *setname = "x87";
63 *type = DW_ATE_float;
64 *bits = 80;
65 }
66 else if (regno < 29)
67 {
68 *setname = "SSE";
69 *bits = 128;
70 }
71 else if (regno < 37)
72 {
73 *setname = "MMX";
74 *bits = 64;
75 }
76 else if (regno < 40)
77 *setname = "FPU-control";
78 else
79 {
80 *setname = "segment";
81 *bits = 16;
82 }
83
84 switch (regno)
85 {
86 static const char baseregs[][2] =
87 {
88 "ax", "cx", "dx", "bx", "sp", "bp", "si", "di", "ip"
89 };
90
91 case 4:
92 case 5:
93 case 8:
94 *type = DW_ATE_address;
95 case 0 ... 3:
96 case 6 ... 7:
97 name[0] = 'e';
98 name[1] = baseregs[regno][0];
99 name[2] = baseregs[regno][1];
100 namelen = 3;
101 break;
102
103 case 9:
104 return stpcpy (name, "eflags") + 1 - name;
105 case 10:
106 return stpcpy (name, "trapno") + 1 - name;
107
108 case 11 ... 18:
109 name[0] = 's';
110 name[1] = 't';
111 name[2] = regno - 11 + '0';
112 namelen = 3;
113 break;
114
115 case 21 ... 28:
116 name[0] = 'x';
117 name[1] = 'm';
118 name[2] = 'm';
119 name[3] = regno - 21 + '0';
120 namelen = 4;
121 break;
122
123 case 29 ... 36:
124 name[0] = 'm';
125 name[1] = 'm';
126 name[2] = regno - 29 + '0';
127 namelen = 3;
128 break;
129
130 case 37:
131 *bits = 16;
132 return stpcpy (name, "fctrl") + 1 - name;
133 case 38:
134 *bits = 16;
135 return stpcpy (name, "fstat") + 1 - name;
136 case 39:
137 return stpcpy (name, "mxcsr") + 1 - name;
138
139 case 40 ... 45:
140 name[0] = "ecsdfg"[regno - 40];
141 name[1] = 's';
142 namelen = 2;
143 break;
144
145 default:
146 *setname = NULL;
147 return 0;
148 }
149
150 name[namelen++] = '\0';
151 return namelen;
152 }
153