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
|
/* Native-dependent code for Alpha BSD's.
Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
#include "alpha-tdep.h"
#include "alphabsd-tdep.h"
#include "inf-ptrace.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"
/* Provide *regset() wrappers around the generic Alpha BSD register
supply/fill routines. */
void
supply_gregset (struct regcache *regcache, const gregset_t *gregsetp)
{
alphabsd_supply_reg (regcache, (const char *) gregsetp, -1);
}
void
fill_gregset (const struct regcache *regcache, gregset_t *gregsetp, int regno)
{
alphabsd_fill_reg (regcache, (char *) gregsetp, regno);
}
void
supply_fpregset (struct regcache *regcache, const fpregset_t *fpregsetp)
{
alphabsd_supply_fpreg (regcache, (const char *) fpregsetp, -1);
}
void
fill_fpregset (const struct regcache *regcache, fpregset_t *fpregsetp, int regno)
{
alphabsd_fill_fpreg (regcache, (char *) fpregsetp, regno);
}
/* Determine if PT_GETREGS fetches this register. */
static int
getregs_supplies (int regno)
{
return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM)
|| regno >= ALPHA_PC_REGNUM);
}
/* Fetch register REGNO from the inferior. If REGNO is -1, do this
for all registers (including the floating point registers). */
static void
alphabsd_fetch_inferior_registers (struct regcache *regcache, int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
struct reg gregs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) &gregs, 0) == -1)
perror_with_name (_("Couldn't get registers"));
alphabsd_supply_reg (regcache, (char *) &gregs, regno);
if (regno != -1)
return;
}
if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
alphabsd_supply_fpreg (regcache, (char *) &fpregs, regno);
}
}
/* Store register REGNO back into the inferior. If REGNO is -1, do
this for all registers (including the floating point registers). */
static void
alphabsd_store_inferior_registers (struct regcache *regcache, int regno)
{
if (regno == -1 || getregs_supplies (regno))
{
struct reg gregs;
if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) &gregs, 0) == -1)
perror_with_name (_("Couldn't get registers"));
alphabsd_fill_reg (regcache, (char *) &gregs, regno);
if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) &gregs, 0) == -1)
perror_with_name (_("Couldn't write registers"));
if (regno != -1)
return;
}
if (regno == -1 || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache)))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
alphabsd_fill_fpreg (regcache, (char *) &fpregs, regno);
if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't write floating point status"));
}
}
/* Support for debugging kernel virtual memory images. */
#include <sys/types.h>
#include <sys/signal.h>
#include <machine/pcb.h>
#include "bsd-kvm.h"
static int
alphabsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
int regnum;
/* The following is true for OpenBSD 3.9:
The pcb contains the register state at the context switch inside
cpu_switch(). */
/* The stack pointer shouldn't be zero. */
if (pcb->pcb_hw.apcb_ksp == 0)
return 0;
regcache_raw_supply (regcache, ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp);
for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++)
regcache_raw_supply (regcache, regnum,
&pcb->pcb_context[regnum - ALPHA_S0_REGNUM]);
regcache_raw_supply (regcache, ALPHA_RA_REGNUM, &pcb->pcb_context[7]);
return 1;
}
/* Provide a prototype to silence -Wmissing-prototypes. */
void _initialize_alphabsd_nat (void);
void
_initialize_alphabsd_nat (void)
{
struct target_ops *t;
t = inf_ptrace_target ();
t->to_fetch_registers = alphabsd_fetch_inferior_registers;
t->to_store_registers = alphabsd_store_inferior_registers;
add_target (t);
/* Support debugging kernel virtual memory images. */
bsd_kvm_add_target (alphabsd_supply_pcb);
}
|
