1/* Register names and numbers for i386 DWARF.
2   Copyright (C) 2005, 2006, 2007 Red Hat, Inc.
3   This file is part of Red Hat elfutils.
4
5   Red Hat elfutils is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by the
7   Free Software Foundation; version 2 of the License.
8
9   Red Hat elfutils is distributed in the hope that it will be useful, but
10   WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   General Public License for more details.
13
14   You should have received a copy of the GNU General Public License along
15   with Red Hat elfutils; if not, write to the Free Software Foundation,
16   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
17
18   Red Hat elfutils is an included package of the Open Invention Network.
19   An included package of the Open Invention Network is a package for which
20   Open Invention Network licensees cross-license their patents.  No patent
21   license is granted, either expressly or impliedly, by designation as an
22   included package.  Should you wish to participate in the Open Invention
23   Network licensing program, please visit www.openinventionnetwork.com
24   <http://www.openinventionnetwork.com>.  */
25
26#ifdef HAVE_CONFIG_H
27# include <config.h>
28#endif
29
30#include <string.h>
31#include <dwarf.h>
32
33#define BACKEND i386_
34#include "libebl_CPU.h"
35
36ssize_t
37i386_register_info (Ebl *ebl __attribute__ ((unused)),
38		    int regno, char *name, size_t namelen,
39		    const char **prefix, const char **setname,
40		    int *bits, int *type)
41{
42  if (name == NULL)
43    return 46;
44
45  if (regno < 0 || regno > 45 || namelen < 6)
46    return -1;
47
48  *prefix = "%";
49  *bits = 32;
50  *type = DW_ATE_unsigned;
51  if (regno < 11)
52    {
53      *setname = "integer";
54      if (regno < 9)
55	*type = DW_ATE_signed;
56    }
57  else if (regno < 19)
58    {
59      *setname = "x87";
60      *type = DW_ATE_float;
61      *bits = 80;
62    }
63  else if (regno < 29)
64    {
65      *setname = "SSE";
66      *bits = 128;
67    }
68  else if (regno < 37)
69    {
70      *setname = "MMX";
71      *bits = 64;
72    }
73  else if (regno < 40)
74    *setname = "FPU-control";
75  else
76    {
77      *setname = "segment";
78      *bits = 16;
79    }
80
81  switch (regno)
82    {
83      static const char baseregs[][2] =
84	{
85	  "ax", "cx", "dx", "bx", "sp", "bp", "si", "di", "ip"
86	};
87
88    case 4:
89    case 5:
90    case 8:
91      *type = DW_ATE_address;
92    case 0 ... 3:
93    case 6 ... 7:
94      name[0] = 'e';
95      name[1] = baseregs[regno][0];
96      name[2] = baseregs[regno][1];
97      namelen = 3;
98      break;
99
100    case 9:
101      return stpcpy (name, "eflags") + 1 - name;
102    case 10:
103      return stpcpy (name, "trapno") + 1 - name;
104
105    case 11 ... 18:
106      name[0] = 's';
107      name[1] = 't';
108      name[2] = regno - 11 + '0';
109      namelen = 3;
110      break;
111
112    case 21 ... 28:
113      name[0] = 'x';
114      name[1] = 'm';
115      name[2] = 'm';
116      name[3] = regno - 21 + '0';
117      namelen = 4;
118      break;
119
120    case 29 ... 36:
121      name[0] = 'm';
122      name[1] = 'm';
123      name[2] = regno - 29 + '0';
124      namelen = 3;
125      break;
126
127    case 37:
128      *bits = 16;
129      return stpcpy (name, "fctrl") + 1 - name;
130    case 38:
131      *bits = 16;
132      return stpcpy (name, "fstat") + 1 - name;
133    case 39:
134      return stpcpy (name, "mxcsr") + 1 - name;
135
136    case 40 ... 45:
137      name[0] = "ecsdfg"[regno - 40];
138      name[1] = 's';
139      namelen = 2;
140      break;
141
142    default:
143      *setname = NULL;
144      return 0;
145    }
146
147  name[namelen++] = '\0';
148  return namelen;
149}
150