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
|
/* Native-dependent code for FreeBSD/arm.
Copyright (C) 2017-2019 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"
/* Standard C includes. */
#include <machine/reg.h>
#include <sys/ptrace.h>
#include <sys/types.h>
/* Local non-gdb includes. */
#include "arm-fbsd-tdep.h"
#include "arm-tdep.h"
#include "fbsd-nat.h"
#include "inf-ptrace.h"
#include "target.h"
struct arm_fbsd_nat_target : public fbsd_nat_target
{
void fetch_registers (struct regcache *, int) override;
void store_registers (struct regcache *, int) override;
const struct target_desc *read_description () override;
};
static arm_fbsd_nat_target the_arm_fbsd_nat_target;
/* Determine if PT_GETREGS fetches REGNUM. */
static bool
getregs_supplies (struct gdbarch *gdbarch, int regnum)
{
return ((regnum >= ARM_A1_REGNUM && regnum <= ARM_PC_REGNUM)
|| regnum == ARM_PS_REGNUM);
}
#ifdef PT_GETVFPREGS
/* Determine if PT_GETVFPREGS fetches REGNUM. */
static bool
getvfpregs_supplies (struct gdbarch *gdbarch, int regnum)
{
return ((regnum >= ARM_D0_REGNUM && regnum <= ARM_D31_REGNUM)
|| regnum == ARM_FPSCR_REGNUM);
}
#endif
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
void
arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
{
pid_t pid = get_ptrace_pid (regcache->ptid ());
struct gdbarch *gdbarch = regcache->arch ();
if (regnum == -1 || getregs_supplies (gdbarch, regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
regcache->supply_regset (&arm_fbsd_gregset, regnum, ®s,
sizeof (regs));
}
#ifdef PT_GETVFPREGS
if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum))
{
struct vfpreg vfpregs;
if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
regcache->supply_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
sizeof (vfpregs));
}
#endif
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers. */
void
arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
{
pid_t pid = get_ptrace_pid (regcache->ptid ());
struct gdbarch *gdbarch = regcache->arch ();
if (regnum == -1 || getregs_supplies (gdbarch, regnum))
{
struct reg regs;
if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
regcache->collect_regset (&arm_fbsd_gregset, regnum, ®s,
sizeof (regs));
if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
}
#ifdef PT_GETVFPREGS
if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum))
{
struct vfpreg vfpregs;
if (ptrace (PT_GETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
regcache->collect_regset (&arm_fbsd_vfpregset, regnum, &vfpregs,
sizeof (vfpregs));
if (ptrace (PT_SETVFPREGS, pid, (PTRACE_TYPE_ARG3) &vfpregs, 0) == -1)
perror_with_name (_("Couldn't write floating point status"));
}
#endif
}
/* Implement the to_read_description method. */
const struct target_desc *
arm_fbsd_nat_target::read_description ()
{
const struct target_desc *desc;
desc = arm_fbsd_read_description_auxv (this);
if (desc == NULL)
desc = this->beneath ()->read_description ();
return desc;
}
void
_initialize_arm_fbsd_nat (void)
{
add_inf_child_target (&the_arm_fbsd_nat_target);
}
|
