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 2004 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 /*
30 * CPU-specific target implementation
31 *
32 * Each CPU provides a set of debugging facilities. We have per-CPU "modules",
33 * each of which exposes a kmt_cpu_t. When initialized, these modules will
34 * install dcmds, walkers, and the like in order to allow the user to take
35 * advantage of features specific to the CPU being used.
36 */
37
38 #include <kmdb/kmdb_kdi.h>
39 #include <kmdb/kvm_cpu_impl.h>
40 #include <mdb/mdb_target.h>
41 #include <mdb/mdb_err.h>
42 #include <mdb/mdb.h>
43
44 static kmt_cpu_ctor_f *const kmt_cpu_ctors[] = {
45 #if defined(__i386) || defined(__amd64)
46 kmt_cpu_amd_create,
47 kmt_cpu_p4_create,
48 #if defined(__i386)
49 kmt_cpu_p6_create,
50 #endif /* __i386 */
51 #endif /* __i386 || __amd64 */
52 NULL
53 };
54
55 kmt_cpu_t *
kmt_cpu_create(mdb_tgt_t * t)56 kmt_cpu_create(mdb_tgt_t *t)
57 {
58 kmt_cpu_t *cpu;
59 int retry = 0;
60 int i;
61
62 for (i = 0; kmt_cpu_ctors[i] != NULL; i++) {
63 if ((cpu = kmt_cpu_ctors[i](t)) != NULL)
64 return (cpu);
65 else if (errno == EAGAIN)
66 retry = 1;
67 }
68
69 if (retry)
70 (void) set_errno(EAGAIN);
71
72 return (NULL);
73 }
74
75 void
kmt_cpu_destroy(kmt_cpu_t * cpu)76 kmt_cpu_destroy(kmt_cpu_t *cpu)
77 {
78 if (cpu != NULL)
79 cpu->kmt_cpu_ops->kco_destroy(cpu);
80 }
81
82 int
kmt_cpu_step_branch(mdb_tgt_t * t,kmt_cpu_t * cpu)83 kmt_cpu_step_branch(mdb_tgt_t *t, kmt_cpu_t *cpu)
84 {
85 if (cpu == NULL || cpu->kmt_cpu_ops->kco_step_branch == NULL)
86 return (set_errno(EMDB_TGTHWNOTSUP));
87
88 return (cpu->kmt_cpu_ops->kco_step_branch(cpu, t));
89 }
90
91 const char *
kmt_cpu_name(kmt_cpu_t * cpu)92 kmt_cpu_name(kmt_cpu_t *cpu)
93 {
94 if (cpu == NULL)
95 return ("none");
96 else
97 return (cpu->kmt_cpu_ops->kco_name(cpu));
98 }
99