1 /* $NetBSD: kgdb_machdep.c,v 1.11 2005/12/24 22:45:35 perry Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-2-Clause-NetBSD
5 *
6 * Copyright (c) 2004 Marcel Moolenaar
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 /*-
31 * Copyright (c) 1997 The NetBSD Foundation, Inc.
32 * All rights reserved.
33 *
34 * This code is derived from software contributed to The NetBSD Foundation
35 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
36 * NASA Ames Research Center.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
48 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
49 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
50 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
51 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
57 * POSSIBILITY OF SUCH DAMAGE.
58 */
59
60 /*
61 * Copyright (c) 1996 Matthias Pfaller.
62 * All rights reserved.
63 *
64 * Redistribution and use in source and binary forms, with or without
65 * modification, are permitted provided that the following conditions
66 * are met:
67 * 1. Redistributions of source code must retain the above copyright
68 * notice, this list of conditions and the following disclaimer.
69 * 2. Redistributions in binary form must reproduce the above copyright
70 * notice, this list of conditions and the following disclaimer in the
71 * documentation and/or other materials provided with the distribution.
72 * 3. All advertising materials mentioning features or use of this software
73 * must display the following acknowledgement:
74 * This product includes software developed by Matthias Pfaller.
75 * 4. The name of the author may not be used to endorse or promote products
76 * derived from this software without specific prior written permission
77 *
78 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
79 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
80 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
81 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
82 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
83 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
84 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
85 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
86 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
87 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
88 *
89 * JNPR: gdb_machdep.c,v 1.1 2007/08/09 12:25:25 katta
90 * $FreeBSD$
91 */
92
93 #include <sys/cdefs.h>
94
95 #include <sys/param.h>
96 #include <sys/systm.h>
97 #include <sys/kdb.h>
98 #include <sys/kernel.h>
99 #include <sys/signal.h>
100 #include <sys/pcpu.h>
101
102 #include <machine/gdb_machdep.h>
103 #include <machine/pcb.h>
104 #include <machine/reg.h>
105 #include <machine/trap.h>
106
107 #include <gdb/gdb.h>
108
109 void *
gdb_cpu_getreg(int regnum,size_t * regsz)110 gdb_cpu_getreg(int regnum, size_t *regsz)
111 {
112
113 *regsz = gdb_cpu_regsz(regnum);
114 if (kdb_thread == curthread) {
115 register_t *zero_ptr = &kdb_frame->zero;
116 return zero_ptr + regnum;
117 }
118
119 switch (regnum) {
120 /*
121 * S0..S7
122 */
123 case 16:
124 case 17:
125 case 18:
126 case 19:
127 case 20:
128 case 21:
129 case 22:
130 case 23:
131 return (&kdb_thrctx->pcb_context[PCB_REG_S0 + regnum - 16]);
132 case 28:
133 return (&kdb_thrctx->pcb_context[PCB_REG_GP]);
134 case 29:
135 return (&kdb_thrctx->pcb_context[PCB_REG_SP]);
136 case 30:
137 return (&kdb_thrctx->pcb_context[PCB_REG_S8]);
138 case 31:
139 return (&kdb_thrctx->pcb_context[PCB_REG_RA]);
140 case 37:
141 return (&kdb_thrctx->pcb_context[PCB_REG_PC]);
142 }
143 return (NULL);
144 }
145
146 void
gdb_cpu_setreg(int regnum,void * val)147 gdb_cpu_setreg(int regnum, void *val)
148 {
149 switch (regnum) {
150 case GDB_REG_PC:
151 kdb_thrctx->pcb_context[10] = *(register_t *)val;
152 if (kdb_thread == curthread)
153 kdb_frame->pc = *(register_t *)val;
154 }
155 }
156
157 int
gdb_cpu_signal(int entry,int code)158 gdb_cpu_signal(int entry, int code)
159 {
160 switch (entry) {
161 case T_TLB_MOD:
162 case T_TLB_MOD+T_USER:
163 case T_TLB_LD_MISS:
164 case T_TLB_ST_MISS:
165 case T_TLB_LD_MISS+T_USER:
166 case T_TLB_ST_MISS+T_USER:
167 case T_ADDR_ERR_LD: /* misaligned access */
168 case T_ADDR_ERR_ST: /* misaligned access */
169 case T_BUS_ERR_LD_ST: /* BERR asserted to CPU */
170 case T_ADDR_ERR_LD+T_USER: /* misaligned or kseg access */
171 case T_ADDR_ERR_ST+T_USER: /* misaligned or kseg access */
172 case T_BUS_ERR_IFETCH+T_USER: /* BERR asserted to CPU */
173 case T_BUS_ERR_LD_ST+T_USER: /* BERR asserted to CPU */
174 return (SIGSEGV);
175
176 case T_BREAK:
177 case T_BREAK+T_USER:
178 return (SIGTRAP);
179
180 case T_RES_INST+T_USER:
181 case T_COP_UNUSABLE+T_USER:
182 return (SIGILL);
183
184 case T_FPE+T_USER:
185 case T_OVFLOW+T_USER:
186 return (SIGFPE);
187
188 default:
189 return (SIGEMT);
190 }
191 }
192