1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <mdb/mdb_modapi.h>
30#include <mdb/mdb_ks.h>
31#include <sys/logindmux_impl.h>
32
33/*
34 * Print our peer's upper queue pointer, and our lower queue pointer.
35 */
36void
37logdmux_uqinfo(const queue_t *q, char *buf, size_t nbytes)
38{
39	struct tmx tmx;
40	uintptr_t peer, lower;
41	queue_t lq;
42
43	/*
44	 * First, get the pointer to our lower write queue.
45	 */
46	(void) mdb_vread(&tmx, sizeof (tmx), (uintptr_t)q->q_ptr);
47	lower = (uintptr_t)tmx.muxq;
48
49	/*
50	 * Now read in the lower's peer, and follow that to up to our peer.
51	 */
52	(void) mdb_vread(&lq, sizeof (lq), (uintptr_t)tmx.peerq);
53	(void) mdb_vread(&tmx, sizeof (tmx), (uintptr_t)lq.q_ptr);
54	peer = (uintptr_t)tmx.rdq;
55
56	(void) mdb_snprintf(buf, nbytes, "peer rq    : %p\nlower wq   : %p",
57	    peer, lower);
58}
59
60/*
61 * Print our peer's lower queue pointer, and our upper queue pointer.
62 */
63void
64logdmux_lqinfo(const queue_t *q, char *buf, size_t nbytes)
65{
66	struct tmx tmx;
67
68	(void) mdb_vread(&tmx, sizeof (tmx), (uintptr_t)q->q_ptr);
69	(void) mdb_snprintf(buf, nbytes, "peer wq    : %p\nupper rq   : %p",
70	    (uintptr_t)tmx.peerq, (uintptr_t)tmx.rdq);
71}
72
73uintptr_t
74logdmux_lrnext(const queue_t *q)
75{
76	struct tmx tmx;
77
78	(void) mdb_vread(&tmx, sizeof (tmx), (uintptr_t)q->q_ptr);
79	return ((uintptr_t)tmx.rdq);
80}
81
82uintptr_t
83logdmux_uwnext(const queue_t *q)
84{
85	struct tmx tmx;
86
87	(void) mdb_vread(&tmx, sizeof (tmx), (uintptr_t)q->q_ptr);
88	return ((uintptr_t)tmx.muxq);
89}
90
91static const mdb_qops_t logdmux_uqops = {
92	logdmux_uqinfo, mdb_qrnext_default, logdmux_uwnext
93};
94
95static const mdb_qops_t logdmux_lqops = {
96	logdmux_lqinfo, logdmux_lrnext, mdb_qwnext_default
97};
98
99static const mdb_modinfo_t modinfo = { MDB_API_VERSION };
100
101const mdb_modinfo_t *
102_mdb_init(void)
103{
104	GElf_Sym sym;
105
106	if (mdb_lookup_by_obj("logindmux", "logdmuxuwinit", &sym) == 0)
107		mdb_qops_install(&logdmux_uqops, (uintptr_t)sym.st_value);
108	if (mdb_lookup_by_obj("logindmux", "logdmuxlwinit", &sym) == 0)
109		mdb_qops_install(&logdmux_lqops, (uintptr_t)sym.st_value);
110
111	return (&modinfo);
112}
113
114void
115_mdb_fini(void)
116{
117	GElf_Sym sym;
118
119	if (mdb_lookup_by_obj("logindmux", "logdmuxuwinit", &sym) == 0)
120		mdb_qops_remove(&logdmux_uqops, (uintptr_t)sym.st_value);
121	if (mdb_lookup_by_obj("logindmux", "logdmuxlwinit", &sym) == 0)
122		mdb_qops_remove(&logdmux_lqops, (uintptr_t)sym.st_value);
123}
124