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
|
/* Native-dependent code for modern VAX BSD's.
Copyright (C) 2004-2020 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/>. */
/* We define this to get types like register_t. */
#define _KERNTYPES
#include "defs.h"
#include "inferior.h"
#include "regcache.h"
#include "target.h"
#include <sys/types.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include "vax-tdep.h"
#include "inf-ptrace.h"
#include "nbsd-nat.h"
struct vax_bsd_nat_target final : public nbsd_nat_target
{
void fetch_registers (struct regcache *, int) override;
void store_registers (struct regcache *, int) override;
};
static vax_bsd_nat_target the_vax_bsd_nat_target;
/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
static void
vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs)
{
const gdb_byte *regs = (const gdb_byte *)gregs;
int regnum;
for (regnum = 0; regnum < VAX_NUM_REGS; regnum++)
regcache->raw_supply (regnum, regs + regnum * 4);
}
/* Collect the general-purpose registers from REGCACHE and store them
in GREGS. */
static void
vaxbsd_collect_gregset (const struct regcache *regcache,
void *gregs, int regnum)
{
gdb_byte *regs = (void *)gregs;
int i;
for (i = 0; i <= VAX_NUM_REGS; i++)
{
if (regnum == -1 || regnum == i)
regcache->raw_collect (i, regs + i * 4);
}
}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
void
vax_bsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
pid_t pid = regcache->ptid ().pid ();
int lwp = regcache->ptid ().lwp ();
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1)
perror_with_name (_("Couldn't get registers"));
vaxbsd_supply_gregset (regcache, ®s);
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers. */
void
vax_bsd_nat_target::store_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
pid_t pid = regcache->ptid ().pid ();
int lwp = regcache->ptid ().lwp ();
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1)
perror_with_name (_("Couldn't get registers"));
vaxbsd_collect_gregset (regcache, ®s, regnum);
if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, lwp) == -1)
perror_with_name (_("Couldn't write registers"));
}
/* Support for debugging kernel virtual memory images. */
#include <machine/pcb.h>
#include "bsd-kvm.h"
static int
vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
{
int regnum;
/* The following is true for OpenBSD 3.5:
The pcb contains the register state at the context switch inside
cpu_switch(). */
/* The stack pointer shouldn't be zero. */
if (pcb->KSP == 0)
return 0;
for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++)
regcache->raw_supply (regnum, &pcb->R[regnum - VAX_R0_REGNUM]);
regcache->raw_supply (VAX_AP_REGNUM, &pcb->AP);
regcache->raw_supply (VAX_FP_REGNUM, &pcb->FP);
regcache->raw_supply (VAX_SP_REGNUM, &pcb->KSP);
regcache->raw_supply (VAX_PC_REGNUM, &pcb->PC);
regcache->raw_supply (VAX_PS_REGNUM, &pcb->PSL);
return 1;
}
void _initialize_vaxbsd_nat ();
void
_initialize_vaxbsd_nat ()
{
add_inf_child_target (&the_vax_bsd_nat_target);
/* Support debugging kernel virtual memory images. */
bsd_kvm_add_target (vaxbsd_supply_pcb);
}
|
