1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* Native-dependent code for Alpha BSD's.
Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#ifdef HAVE_SYS_PROCFS_H
#include <sys/procfs.h>
#endif
#ifndef HAVE_GREGSET_T
typedef struct reg gregset_t;
#endif
#ifndef HAVE_FPREGSET_T
typedef struct fpreg fpregset_t;
#endif
#include "gregset.h"
/* Number of general-purpose registers. */
#define NUM_GREGS 32
/* Number of floating point registers. */
#define NUM_FPREGS 31
/* Transfering the registers between GDB, inferiors and core files. */
/* Fill GDB's register array with the general-purpose register values
in *GREGSETP. */
void
supply_gregset (gregset_t *gregsetp)
{
int i;
for (i = 0; i < NUM_GREGS; i++)
{
if (CANNOT_FETCH_REGISTER (i))
supply_register (i, NULL);
else
supply_register (i, (char *) &gregsetp->r_regs[i]);
}
/* The PC travels in the R_ZERO slot. */
supply_register (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
}
/* Fill register REGNO (if it is a general-purpose register) in
*GREGSETPS with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
fill_gregset (gregset_t *gregsetp, int regno)
{
int i;
for (i = 0; i < NUM_GREGS; i++)
if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
regcache_collect (i, (char *) &gregsetp->r_regs[i]);
/* The PC travels in the R_ZERO slot. */
if (regno == -1 || regno == PC_REGNUM)
regcache_collect (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]);
}
/* Fill GDB's register array with the floating-point register values
in *FPREGSETP. */
void
supply_fpregset (fpregset_t *fpregsetp)
{
int i;
for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
{
if (CANNOT_FETCH_REGISTER (i))
supply_register (i, NULL);
else
supply_register (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]);
}
supply_register (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
}
/* Fill register REGNO (if it is a floating-point register) in
*FPREGSETP with the value in GDB's register array. If REGNO is -1,
do this for all registers. */
void
fill_fpregset (fpregset_t *fpregsetp, int regno)
{
int i;
for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++)
if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i))
regcache_collect (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]);
if (regno == -1 || regno == FPCR_REGNUM)
regcache_collect (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr);
}
/* Determine if PT_GETREGS fetches this register. */
static int
getregs_supplies (int regno)
{
return ((regno >= V0_REGNUM && regno <= ZERO_REGNUM)
|| regno >= PC_REGNUM);
}
/* Fetch register REGNO from the inferior. If REGNO is -1, do this
for all registers (including the floating point registers). */
void
fetch_inferior_registers (int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
gregset_t gregs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't get registers");
supply_gregset (&gregs);
if (regno != -1)
return;
}
if (regno == -1 || regno >= FP0_REGNUM)
{
fpregset_t fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
supply_fpregset (&fpregs);
}
/* Reset virtual frame pointer. */
supply_register (FP_REGNUM, NULL);
}
/* Store register REGNO back into the inferior. If REGNO is -1, do
this for all registers (including the floating point registers). */
void
store_inferior_registers (int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
gregset_t gregs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't get registers");
fill_gregset (&gregs, regno);
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &gregs, 0) == -1)
perror_with_name ("Couldn't write registers");
if (regno != -1)
return;
}
if (regno == -1 || regno >= FP0_REGNUM)
{
fpregset_t fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't get floating point status");
fill_fpregset (&fpregs, regno);
if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
(PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
perror_with_name ("Couldn't write floating point status");
}
}
|
