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
|
/* Native-dependent code for FreeBSD/mips.
Copyright (C) 2017-2020 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/>. */
#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 "fbsd-nat.h"
#include "mips-tdep.h"
#include "mips-fbsd-tdep.h"
#include "inf-ptrace.h"
struct mips_fbsd_nat_target final : public fbsd_nat_target
{
void fetch_registers (struct regcache *, int) override;
void store_registers (struct regcache *, int) override;
};
static mips_fbsd_nat_target the_mips_fbsd_nat_target;
/* Determine if PT_GETREGS fetches REGNUM. */
static bool
getregs_supplies (struct gdbarch *gdbarch, int regnum)
{
return (regnum >= MIPS_ZERO_REGNUM
&& regnum <= mips_regnum (gdbarch)->pc);
}
/* Determine if PT_GETFPREGS fetches REGNUM. */
static bool
getfpregs_supplies (struct gdbarch *gdbarch, int regnum)
{
return (regnum >= mips_regnum (gdbarch)->fp0
&& regnum <= mips_regnum (gdbarch)->fp_implementation_revision);
}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers. */
void
mips_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"));
mips_fbsd_supply_gregs (regcache, regnum, ®s, sizeof (register_t));
}
if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
mips_fbsd_supply_fpregs (regcache, regnum, &fpregs,
sizeof (f_register_t));
}
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
this for all registers. */
void
mips_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"));
mips_fbsd_collect_gregs (regcache, regnum, (char *) ®s,
sizeof (register_t));
if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
}
if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
{
struct fpreg fpregs;
if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
mips_fbsd_collect_fpregs (regcache, regnum, (char *) &fpregs,
sizeof (f_register_t));
if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't write floating point status"));
}
}
void
_initialize_mips_fbsd_nat (void)
{
add_inf_child_target (&the_mips_fbsd_nat_target);
}
|
