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 2006 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 * SPARC-specific portions of the DPI
31 */
32
33 #include <sys/types.h>
34 #include <sys/mmu.h>
35 #include <sys/trap.h>
36 #include <sys/machtrap.h>
37
38 #include <kmdb/kmdb_dpi_impl.h>
39 #include <kmdb/kmdb_asmutil.h>
40 #include <kmdb/kmdb_promif.h>
41 #include <kmdb/kmdb_fault.h>
42 #include <mdb/mdb_err.h>
43 #include <mdb/mdb_debug.h>
44 #include <mdb/mdb_kreg.h>
45 #include <mdb/mdb.h>
46
47 void
kmdb_dpi_handle_fault(kreg_t tt,kreg_t tpc,kreg_t tnpc,kreg_t sp,int cpuid)48 kmdb_dpi_handle_fault(kreg_t tt, kreg_t tpc, kreg_t tnpc, kreg_t sp, int cpuid)
49 {
50 mdb_dprintf(MDB_DBG_DPI, "\ndpi_handle_fault: tt 0x%01lx, tpc 0x%0?p, "
51 "tnpc 0x%0?p, sp 0x%0?p, fault_pcb 0x%0?p\n", tt, tpc, tnpc, sp,
52 kmdb_dpi_fault_pcb);
53
54 switch (tt) {
55 case FAST_PROT_TT:
56 errno = EACCES;
57 break;
58 case T_DATA_ERROR:
59 errno = EIO;
60 break;
61 #ifdef sun4v
62 case T_DATA_MMU_MISS:
63 #endif /* sun4v */
64 case FAST_DMMU_MISS_TT:
65 default:
66 errno = EMDB_NOMAP;
67 }
68
69 if (kmdb_dpi_fault_pcb != NULL) {
70 longjmp(*kmdb_dpi_fault_pcb, 1);
71 /*NOTREACHED*/
72 }
73
74 /* Debugger fault */
75 kmdb_fault(tt, tpc, sp, cpuid);
76 }
77
78 int
kmdb_dpi_get_register(const char * regname,kreg_t * kregp)79 kmdb_dpi_get_register(const char *regname, kreg_t *kregp)
80 {
81 return (mdb.m_dpi->dpo_get_register(regname, kregp));
82 }
83
84 int
kmdb_dpi_set_register(const char * regname,kreg_t kreg)85 kmdb_dpi_set_register(const char *regname, kreg_t kreg)
86 {
87 return (mdb.m_dpi->dpo_set_register(regname, kreg));
88 }
89
90 int
kmdb_dpi_get_rwin(int cpuid,int win,struct rwindow * rwin)91 kmdb_dpi_get_rwin(int cpuid, int win, struct rwindow *rwin)
92 {
93 return (mdb.m_dpi->dpo_get_rwin(cpuid, win, rwin));
94 }
95
96 int
kmdb_dpi_get_nwin(int cpuid)97 kmdb_dpi_get_nwin(int cpuid)
98 {
99 return (mdb.m_dpi->dpo_get_nwin(cpuid));
100 }
101
102 void
kmdb_dpi_kernpanic(int cpuid)103 kmdb_dpi_kernpanic(int cpuid)
104 {
105 mdb.m_dpi->dpo_kernpanic(cpuid);
106 }
107
108 /*
109 * Continue/resume handling. If the target calls kmdb_dpi_resume(), it
110 * expects that the world will be resumed, and that the call will return
111 * when the world has stopped again.
112 *
113 * For support, we have resume_return(), which is called from main() when
114 * the continuation has completed (when the world has stopped again).
115 * set_resume_exit() tells where to jump to actually restart the world.
116 *
117 * CAUTION: This routine may be called *after* mdb_destroy.
118 */
119 void
kmdb_dpi_resume_common(int cmd)120 kmdb_dpi_resume_common(int cmd)
121 {
122 kreg_t pc, tt;
123
124 ASSERT(kmdb_dpi_resume_requested == 0);
125
126 if (setjmp(kmdb_dpi_resume_pcb) == 0) {
127 (void) kmdb_dpi_get_register("pc", &pc);
128 mdb_dprintf(MDB_DBG_PROC, "Resume requested, pc is %p\n",
129 (void *)pc);
130
131 if (cmd != KMDB_DPI_CMD_RESUME_UNLOAD)
132 kmdb_dpi_resume_requested = 1;
133
134 longjmp(kmdb_dpi_entry_pcb, cmd);
135 /*NOTREACHED*/
136
137 } else {
138 (void) kmdb_dpi_get_register("pc", &pc);
139 (void) kmdb_dpi_get_register("tt", &tt);
140 mdb_dprintf(MDB_DBG_PROC, "Back from resume, pc: %p, tt: %lx\n",
141 (void *)pc, tt);
142
143 kmdb_dpi_resume_requested = 0;
144
145 switch (tt) {
146 case T_PA_WATCHPOINT:
147 kmdb_dpi_set_state(DPI_STATE_FAULTED,
148 DPI_STATE_WHY_P_WAPT);
149 break;
150 case T_VA_WATCHPOINT:
151 kmdb_dpi_set_state(DPI_STATE_FAULTED,
152 DPI_STATE_WHY_V_WAPT);
153 break;
154 case ST_KMDB_BREAKPOINT|T_SOFTWARE_TRAP:
155 case ST_MON_BREAKPOINT|T_SOFTWARE_TRAP: /* Shouldn't happen */
156 kmdb_dpi_set_state(DPI_STATE_FAULTED,
157 DPI_STATE_WHY_BKPT);
158 break;
159 case ST_KMDB_TRAP|T_SOFTWARE_TRAP:
160 kmdb_dpi_set_state(DPI_STATE_STOPPED, 0);
161 break;
162 default:
163 kmdb_dpi_set_state(DPI_STATE_FAULTED,
164 DPI_STATE_WHY_TRAP);
165 break;
166 }
167 }
168 }
169