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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2012 Gary Mills
24 *
25 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 #include <kmdb/kmdb_auxv.h>
30 #include <kmdb/kctl/kctl.h>
31
32 #include <sys/bootconf.h>
33 #include <sys/kobj.h>
34 #include <sys/kobj_impl.h>
35 #include <sys/cpuvar.h>
36 #include <sys/kdi_impl.h>
37 #include <sys/x86_archext.h>
38 #include <sys/controlregs.h>
39 #include <sys/archsystm.h>
40
41 static int
42 kctl_boot_prop_read(char *pname, char *prop_buf, int buf_len)
43 {
44 struct bootops *ops = kctl.kctl_boot_ops;
45 int len;
46
47 len = BOP_GETPROPLEN(ops, pname);
48 if (len > 0 && len <= buf_len) {
49 (void) BOP_GETPROP(ops, pname, (void *)prop_buf);
50 return (1);
51 }
52
53 return (0);
54 }
55
56 static int
57 kctl_ddi_prop_read(char *pname, char *prop_buf, int buf_len)
58 {
59 dev_info_t *dip = ddi_root_node();
60 char *val;
61 int ret = 0;
62
63 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip,
64 DDI_PROP_DONTPASS, pname, &val) != DDI_SUCCESS)
65 return (0);
66
67 if (strlen(val) < buf_len) {
68 (void) strcpy(prop_buf, val);
69 ret = 1;
70 }
71
72 ddi_prop_free(val);
73 return (ret);
74 }
75
76 /*
77 * We don't have any property-walking routines, so we have to specifically
78 * query and thus have guilty knowledge of the properties that the
79 * debugger wants to see.
80 *
81 * Here actually we only support six console properties:
82 * input-device, output-device, tty[a-d]-mode.
83 */
84 #define KCTL_PROPNV_NIODEV 2
85 #define KCTL_PROPNV_NTTYMD 4
86 #define KCTL_PROPNV_NENT (KCTL_PROPNV_NIODEV + KCTL_PROPNV_NTTYMD)
87
88 static kmdb_auxv_nv_t *
89 kctl_pcache_create(int *nprops)
90 {
91 int (*preader)(char *, char *, int);
92 kmdb_auxv_nv_t *pnv;
93 size_t psz = sizeof (kmdb_auxv_nv_t) * KCTL_PROPNV_NENT;
94 char *inputdev, *outputdev;
95 int i;
96 char ttymode[] = "ttyX-mode";
97
98 if (kctl.kctl_boot_loaded) {
99 preader = kctl_boot_prop_read;
100 } else {
101 preader = kctl_ddi_prop_read;
102 }
103
104 pnv = kobj_alloc(psz, KM_WAIT);
105 inputdev = (&pnv[0])->kanv_val;
106 outputdev = (&pnv[1])->kanv_val;
107
108 /* Set the property names. */
109 (void) strcpy((&pnv[0])->kanv_name, "input-device");
110 (void) strcpy((&pnv[1])->kanv_name, "output-device");
111 for (i = 0; i < KCTL_PROPNV_NTTYMD; i++) {
112 ttymode[3] = 'a' + i;
113 (void) strcpy((&pnv[i + KCTL_PROPNV_NIODEV])->kanv_name,
114 ttymode);
115 }
116
117 /*
118 * console is defined by "console" property, with
119 * fallback on the old "input-device" property.
120 */
121 (void) strcpy(inputdev, "text"); /* default to screen */
122 if (!preader("console", inputdev, sizeof ((&pnv[0])->kanv_val)))
123 (void) preader("input-device", inputdev,
124 sizeof ((&pnv[0])->kanv_val));
125
126 if (strncmp(inputdev, "tty", 3) == 0 &&
127 inputdev[4] == '\0' &&
128 inputdev[3] >= 'a' &&
129 inputdev[3] < 'a' + KCTL_PROPNV_NTTYMD) {
130 (void) strcpy(outputdev, inputdev);
131 } else {
132 (void) strcpy(inputdev, "keyboard");
133 (void) strcpy(outputdev, "screen");
134 }
135
136 /* Set tty modes or defaults. */
137 for (i = KCTL_PROPNV_NIODEV; i < KCTL_PROPNV_NENT; i++) {
138 if (!preader((&pnv[i])->kanv_name, (&pnv[i])->kanv_val,
139 sizeof ((&pnv[0])->kanv_val)))
140 (void) strcpy((&pnv[i])->kanv_val, "9600,8,n,1,-");
141 }
142
143 *nprops = KCTL_PROPNV_NENT;
144 return (pnv);
145 }
146
147 static void
148 kctl_pcache_destroy(kmdb_auxv_nv_t *pnv)
149 {
150 kobj_free(pnv, sizeof (kmdb_auxv_nv_t) * KCTL_PROPNV_NENT);
151 }
152
153 void
154 kctl_auxv_init_isadep(kmdb_auxv_t *kav, void *romp)
155 {
156 kav->kav_pcache = kctl_pcache_create(&kav->kav_nprops);
157 kav->kav_romp = romp;
158 }
159
160 void
161 kctl_auxv_fini_isadep(kmdb_auxv_t *kav)
162 {
163 if (kav->kav_pcache != NULL)
164 kctl_pcache_destroy(kav->kav_pcache);
165 }
166
167 int
168 kctl_preactivate_isadep(void)
169 {
170 return (0);
171 }
172
173 /*ARGSUSED*/
174 void
175 kctl_activate_isadep(kdi_debugvec_t *dvec)
176 {
177 dvec->dv_kctl_vmready = hat_kdi_init;
178
179 if (!kctl.kctl_boot_loaded)
180 hat_kdi_init();
181 }
182
183 void
184 kctl_depreactivate_isadep(void)
185 {
186 }
187
188 /*
189 * Many common kernel functions assume that %gs can be deferenced, and
190 * fail horribly if it cannot. Ask the kernel to set up a temporary
191 * mapping to a fake cpu_t so that we can call such functions during
192 * initialization.
193 */
194 void *
195 kctl_boot_tmpinit(void)
196 {
197 return (boot_kdi_tmpinit());
198 }
199
200 void
201 kctl_boot_tmpfini(void *old)
202 {
203 boot_kdi_tmpfini(old);
204 }