1 /* $NetBSD: fault.c,v 1.45 2003/11/20 14:44:36 scw Exp $ */
4 * Copyright 2004 Olivier Houchard
5 * Copyright 2003 Wasabi Systems, Inc.
8 * Written by Steve C. Woodford for Wasabi Systems, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed for the NetBSD Project by
21 * Wasabi Systems, Inc.
22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23 * or promote products derived from this software without specific prior
26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
39 * Copyright (c) 1994-1997 Mark Brinicombe.
40 * Copyright (c) 1994 Brini.
41 * All rights reserved.
43 * This code is derived from software written for Brini by Mark Brinicombe
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. All advertising materials mentioning features or use of this software
54 * must display the following acknowledgement:
55 * This product includes software developed by Brini.
56 * 4. The name of the company nor the name of the author may be used to
57 * endorse or promote products derived from this software without specific
58 * prior written permission.
60 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
61 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
62 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
63 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
64 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
65 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
66 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 * RiscBSD kernel project
82 #include <sys/cdefs.h>
83 __FBSDID("$FreeBSD$");
85 #include <sys/param.h>
86 #include <sys/systm.h>
87 #include <sys/kernel.h>
90 #include <sys/mutex.h>
91 #include <sys/syscall.h>
92 #include <sys/sysent.h>
93 #include <sys/signalvar.h>
94 #include <sys/ptrace.h>
95 #include <sys/pioctl.h>
97 #include <machine/frame.h>
99 void swi_handler(struct trapframe *);
102 cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
108 sa->code = td->td_frame->tf_r7;
109 ap = &td->td_frame->tf_r0;
110 if (sa->code == SYS_syscall) {
113 } else if (sa->code == SYS___syscall) {
114 sa->code = ap[_QUAD_LOWWORD];
119 if (p->p_sysent->sv_mask)
120 sa->code &= p->p_sysent->sv_mask;
121 if (sa->code >= p->p_sysent->sv_size)
122 sa->callp = &p->p_sysent->sv_table[0];
124 sa->callp = &p->p_sysent->sv_table[sa->code];
125 sa->narg = sa->callp->sy_narg;
127 memcpy(sa->args, ap, sa->nap * sizeof(register_t));
128 if (sa->narg > sa->nap) {
129 error = copyin((void *)td->td_frame->tf_usr_sp, sa->args +
130 sa->nap, (sa->narg - sa->nap) * sizeof(register_t));
133 td->td_retval[0] = 0;
134 td->td_retval[1] = 0;
139 #include "../../kern/subr_syscall.c"
142 syscall(struct thread *td, struct trapframe *frame)
144 struct syscall_args sa;
149 error = syscallenter(td, &sa);
150 KASSERT(error != 0 || td->td_ar == NULL,
151 ("returning from syscall with td_ar set!"));
152 syscallret(td, error, &sa);
156 swi_handler(struct trapframe *frame)
158 struct thread *td = curthread;
160 td->td_frame = frame;
165 * Enable interrupts if they were enabled before the exception.
166 * Since all syscalls *should* come from user mode it will always
167 * be safe to enable them, but check anyway.
169 if (td->td_md.md_spinlock_count == 0) {
170 if (__predict_true(frame->tf_spsr & PSR_I) == 0)
171 enable_interrupts(PSR_I);
172 if (__predict_true(frame->tf_spsr & PSR_F) == 0)
173 enable_interrupts(PSR_F);