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
|
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2020 The FreeBSD Foundation
*
* This software was developed by Mitchell Horne under sponsorship from
* the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/signal.h>
#include <machine/armreg.h>
#include <machine/frame.h>
#include <machine/gdb_machdep.h>
#include <machine/pcb.h>
#include <gdb/gdb.h>
void *
gdb_cpu_getreg(int regnum, size_t *regsz)
{
*regsz = gdb_cpu_regsz(regnum);
if (kdb_thread == curthread) {
switch (regnum) {
case GDB_REG_LR: return (&kdb_frame->tf_lr);
case GDB_REG_SP: return (&kdb_frame->tf_sp);
case GDB_REG_PC: return (&kdb_frame->tf_elr);
case GDB_REG_CSPR: return (&kdb_frame->tf_spsr);
}
}
switch (regnum) {
case GDB_REG_SP: return (&kdb_thrctx->pcb_sp);
case GDB_REG_PC: /* FALLTHROUGH */
case GDB_REG_LR: return (&kdb_thrctx->pcb_lr);
default:
if (regnum >= GDB_REG_X0 && regnum <= GDB_REG_X29)
return (&kdb_thrctx->pcb_x[regnum]);
break;
}
return (NULL);
}
void
gdb_cpu_setreg(int regnum, void *val)
{
register_t regval = *(register_t *)val;
/* For curthread, keep the pcb and trapframe in sync. */
if (kdb_thread == curthread) {
switch (regnum) {
case GDB_REG_PC: kdb_frame->tf_elr = regval; break;
case GDB_REG_SP: kdb_frame->tf_sp = regval; break;
default:
if (regnum >= GDB_REG_X0 && regnum <= GDB_REG_X29) {
kdb_frame->tf_x[regnum] = regval;
}
break;
}
}
switch (regnum) {
case GDB_REG_PC: /* FALLTHROUGH */
case GDB_REG_LR: kdb_thrctx->pcb_lr = regval; break;
case GDB_REG_SP: kdb_thrctx->pcb_sp = regval; break;
default:
if (regnum >= GDB_REG_X0 && regnum <= GDB_REG_X29) {
kdb_thrctx->pcb_x[regnum] = regval;
}
break;
}
}
int
gdb_cpu_signal(int type, int code __unused)
{
switch (type) {
case EXCP_WATCHPT_EL1:
case EXCP_SOFTSTP_EL1:
case EXCP_BRK:
return (SIGTRAP);
}
return (SIGEMT);
}
|
