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 (c) 2000 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/mdb_modapi.h>
30 #include <sys/thread.h>
31 #include "ctxop.h"
32
33 int
ctxop_walk_init(mdb_walk_state_t * wsp)34 ctxop_walk_init(mdb_walk_state_t *wsp)
35 {
36 kthread_t thread, *tp = &thread;
37
38 if (wsp->walk_addr == NULL) {
39 mdb_warn("must specify thread for ctxop walk\n");
40 return (WALK_ERR);
41 }
42 if (mdb_vread(tp, sizeof (*tp), wsp->walk_addr) == -1) {
43 mdb_warn("failed to read thread at %p", wsp->walk_addr);
44 return (WALK_ERR);
45 }
46
47 wsp->walk_data = mdb_alloc(sizeof (ctxop_t), UM_SLEEP);
48 wsp->walk_addr = (uintptr_t)tp->t_ctx;
49
50 return (WALK_NEXT);
51 }
52
53 int
ctxop_walk_step(mdb_walk_state_t * wsp)54 ctxop_walk_step(mdb_walk_state_t *wsp)
55 {
56 int status;
57
58 if (wsp->walk_addr == NULL)
59 return (WALK_DONE);
60
61 if (mdb_vread(wsp->walk_data,
62 sizeof (ctxop_t), wsp->walk_addr) == -1) {
63 mdb_warn("failed to read ctxop at %p", wsp->walk_addr);
64 return (WALK_DONE);
65 }
66
67 status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
68 wsp->walk_cbdata);
69
70 wsp->walk_addr = (uintptr_t)(((ctxop_t *)wsp->walk_data)->next);
71 return (status);
72 }
73
74 void
ctxop_walk_fini(mdb_walk_state_t * wsp)75 ctxop_walk_fini(mdb_walk_state_t *wsp)
76 {
77 mdb_free(wsp->walk_data, sizeof (ctxop_t));
78 }
79