1 /* $NetBSD: kgdb_machdep.c,v 1.11 2005/12/24 22:45:35 perry Exp $ */
2
3 /*-
4 * Copyright (c) 2004 Marcel Moolenaar
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 /*-
29 * Copyright (c) 1997 The NetBSD Foundation, Inc.
30 * All rights reserved.
31 *
32 * This code is derived from software contributed to The NetBSD Foundation
33 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
34 * NASA Ames Research Center.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. All advertising materials mentioning features or use of this software
45 * must display the following acknowledgement:
46 * This product includes software developed by the NetBSD
47 * Foundation, Inc. and its contributors.
48 * 4. Neither the name of The NetBSD Foundation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
53 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
54 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
55 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
56 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
57 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
58 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
59 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
60 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
61 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
62 * POSSIBILITY OF SUCH DAMAGE.
63 */
64
65 /*
66 * Copyright (c) 1996 Matthias Pfaller.
67 * All rights reserved.
68 *
69 * Redistribution and use in source and binary forms, with or without
70 * modification, are permitted provided that the following conditions
71 * are met:
72 * 1. Redistributions of source code must retain the above copyright
73 * notice, this list of conditions and the following disclaimer.
74 * 2. Redistributions in binary form must reproduce the above copyright
75 * notice, this list of conditions and the following disclaimer in the
76 * documentation and/or other materials provided with the distribution.
77 * 3. All advertising materials mentioning features or use of this software
78 * must display the following acknowledgement:
79 * This product includes software developed by Matthias Pfaller.
80 * 4. The name of the author may not be used to endorse or promote products
81 * derived from this software without specific prior written permission
82 *
83 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
84 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
85 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
86 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
87 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
88 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
89 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
90 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
91 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
92 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
93 *
94 * JNPR: gdb_machdep.c,v 1.1 2007/08/09 12:25:25 katta
95 * $FreeBSD: releng/9.2/sys/mips/mips/gdb_machdep.c 231150 2012-02-07 19:23:08Z jhb $
96 */
97
98 #include <sys/cdefs.h>
99
100 #include <sys/param.h>
101 #include <sys/systm.h>
102 #include <sys/kdb.h>
103 #include <sys/kernel.h>
104 #include <sys/signal.h>
105 #include <sys/pcpu.h>
106
107 #include <machine/gdb_machdep.h>
108 #include <machine/pcb.h>
109 #include <machine/reg.h>
110 #include <machine/trap.h>
111
112 #include <gdb/gdb.h>
113
114 void *
115 gdb_cpu_getreg(int regnum, size_t *regsz)
116 {
117
118 *regsz = gdb_cpu_regsz(regnum);
119 if (kdb_thread == curthread) {
120 register_t *zero_ptr = &kdb_frame->zero;
121 return zero_ptr + regnum;
122 }
123
124 switch (regnum) {
125 /*
126 * S0..S7
127 */
128 case 16:
129 case 17:
130 case 18:
131 case 19:
132 case 20:
133 case 21:
134 case 22:
135 case 23:
136 return (&kdb_thrctx->pcb_context[PCB_REG_S0 + regnum - 16]);
137 case 28:
138 return (&kdb_thrctx->pcb_context[PCB_REG_GP]);
139 case 29:
140 return (&kdb_thrctx->pcb_context[PCB_REG_SP]);
141 case 30:
142 return (&kdb_thrctx->pcb_context[PCB_REG_S8]);
143 case 31:
144 return (&kdb_thrctx->pcb_context[PCB_REG_RA]);
145 case 37:
146 return (&kdb_thrctx->pcb_context[PCB_REG_PC]);
147 }
148 return (NULL);
149 }
150
151 void
152 gdb_cpu_setreg(int regnum, void *val)
153 {
154 switch (regnum) {
155 case GDB_REG_PC:
156 kdb_thrctx->pcb_context[10] = *(register_t *)val;
157 if (kdb_thread == curthread)
158 kdb_frame->pc = *(register_t *)val;
159 }
160 }
161
162 int
163 gdb_cpu_signal(int entry, int code)
164 {
165 switch (entry) {
166 case T_TLB_MOD:
167 case T_TLB_MOD+T_USER:
168 case T_TLB_LD_MISS:
169 case T_TLB_ST_MISS:
170 case T_TLB_LD_MISS+T_USER:
171 case T_TLB_ST_MISS+T_USER:
172 case T_ADDR_ERR_LD: /* misaligned access */
173 case T_ADDR_ERR_ST: /* misaligned access */
174 case T_BUS_ERR_LD_ST: /* BERR asserted to CPU */
175 case T_ADDR_ERR_LD+T_USER: /* misaligned or kseg access */
176 case T_ADDR_ERR_ST+T_USER: /* misaligned or kseg access */
177 case T_BUS_ERR_IFETCH+T_USER: /* BERR asserted to CPU */
178 case T_BUS_ERR_LD_ST+T_USER: /* BERR asserted to CPU */
179 return (SIGSEGV);
180
181 case T_BREAK:
182 case T_BREAK+T_USER:
183 return (SIGTRAP);
184
185 case T_RES_INST+T_USER:
186 case T_COP_UNUSABLE+T_USER:
187 return (SIGILL);
188
189 case T_FPE+T_USER:
190 case T_OVFLOW+T_USER:
191 return (SIGFPE);
192
193 default:
194 return (SIGEMT);
195 }
196 }
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