1 /*-
2 * Copyright (c) 2001 Jake Burkholder.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/5.3/sys/sparc64/sparc64/sys_machdep.c 119291 2003-08-22 07:39:05Z imp $
27 */
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/lock.h>
32 #include <sys/malloc.h>
33 #include <sys/mutex.h>
34 #include <sys/proc.h>
35 #include <sys/sysproto.h>
36
37 #include <machine/utrap.h>
38 #include <machine/sysarch.h>
39
40 static int sparc_sigtramp_install(struct thread *td, char *args);
41 static int sparc_utrap_install(struct thread *td, char *args);
42
43 #ifndef _SYS_SYSPROTO_H_
44 struct sysarch_args {
45 int op;
46 char *parms;
47 };
48 #endif
49
50 int
51 sysarch(struct thread *td, struct sysarch_args *uap)
52 {
53 int error;
54
55 mtx_lock(&Giant);
56 switch (uap->op) {
57 case SPARC_SIGTRAMP_INSTALL:
58 error = sparc_sigtramp_install(td, uap->parms);
59 break;
60 case SPARC_UTRAP_INSTALL:
61 error = sparc_utrap_install(td, uap->parms);
62 break;
63 default:
64 error = EINVAL;
65 break;
66 }
67 mtx_unlock(&Giant);
68 return (error);
69 }
70
71 static int
72 sparc_sigtramp_install(struct thread *td, char *args)
73 {
74 struct sparc_sigtramp_install_args sia;
75 struct proc *p;
76 int error;
77
78 p = td->td_proc;
79 if ((error = copyin(args, &sia, sizeof(sia))) != 0)
80 return (error);
81 if (sia.sia_old != NULL) {
82 if (suword(sia.sia_old, (long)p->p_md.md_sigtramp) != 0)
83 return (EFAULT);
84 }
85 p->p_md.md_sigtramp = sia.sia_new;
86 return (0);
87 }
88
89 static int
90 sparc_utrap_install(struct thread *td, char *args)
91 {
92 struct sparc_utrap_install_args uia;
93 struct sparc_utrap_args ua;
94 struct md_utrap *ut;
95 int error;
96 int i;
97
98 ut = td->td_proc->p_md.md_utrap;
99 if ((error = copyin(args, &uia, sizeof(uia))) != 0)
100 return (error);
101 if (uia.num < 0 || uia.num > UT_MAX ||
102 (uia.handlers == NULL && uia.num > 0))
103 return (EINVAL);
104 for (i = 0; i < uia.num; i++) {
105 if ((error = copyin(&uia.handlers[i], &ua, sizeof(ua))) != 0)
106 return (error);
107 if (ua.type != UTH_NOCHANGE &&
108 (ua.type < 0 || ua.type >= UT_MAX))
109 return (EINVAL);
110 if (ua.old_deferred != NULL) {
111 if ((error = suword(ua.old_deferred, 0)) != 0)
112 return (error);
113 }
114 if (ua.old_precise != NULL) {
115 error = suword(ua.old_precise,
116 ut != NULL ? (long)ut->ut_precise[ua.type] : 0);
117 if (error != 0)
118 return (error);
119 }
120 if (ua.type != UTH_NOCHANGE) {
121 if (ut == NULL) {
122 ut = malloc(sizeof *ut, M_SUBPROC,
123 M_WAITOK | M_ZERO);
124 ut->ut_refcnt = 1;
125 td->td_proc->p_md.md_utrap = ut;
126 }
127 ut->ut_precise[ua.type] = ua.new_precise;
128 }
129 }
130 return (0);
131 }
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