1/*-
2 * Copyright (c) 2006 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/kdb.h>
33#include <sys/kernel.h>
34#include <sys/proc.h>
35#include <sys/signal.h>
36
37#include <machine/gdb_machdep.h>
38#include <machine/pcb.h>
39#include <machine/reg.h>
40
41#include <machine/hid.h>
42#include <machine/spr.h>
43
44#include <machine/trap.h>
45
46#include <gdb/gdb.h>
47#include <gdb/gdb_int.h>
48
49void *
50gdb_cpu_getreg(int regnum, size_t *regsz)
51{
52
53	*regsz = gdb_cpu_regsz(regnum);
54
55	if (kdb_thread == curthread) {
56		if (regnum == 0 || (regnum >= 2 && regnum <= 31))
57			return (kdb_frame->fixreg + regnum);
58		if (regnum == 64)
59			return (&kdb_frame->srr0);
60		if (regnum == 67)
61			return (&kdb_frame->lr);
62	}
63
64	if (regnum == 1)
65		return (&kdb_thrctx->pcb_sp);
66	if (regnum >= 14 && regnum <= 31)
67		return (kdb_thrctx->pcb_context + (regnum - 14));
68	if (regnum == 64)
69		return (&kdb_thrctx->pcb_lr);
70
71	return (NULL);
72}
73
74void
75gdb_cpu_setreg(int regnum, void *val)
76{
77
78	switch (regnum) {
79	case GDB_REG_PC:
80		break;
81	}
82}
83
84int
85gdb_cpu_signal(int vector, int dummy __unused)
86{
87#if defined(BOOKE)
88	if (vector == EXC_DEBUG || vector == EXC_PGM)
89		return (SIGTRAP);
90#else
91	if (vector == EXC_TRC || vector == EXC_RUNMODETRC)
92		return (SIGTRAP);
93#endif
94
95	if (vector <= 255)
96		return (vector);
97	else
98		return (SIGEMT);
99}
100