1 | /* $NetBSD: sys_syscall.c,v 1.11 2015/03/07 16:38:49 christos Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2006 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by David Laight. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #include <sys/cdefs.h> |
33 | __KERNEL_RCSID(0, "$NetBSD: sys_syscall.c,v 1.11 2015/03/07 16:38:49 christos Exp $" ); |
34 | |
35 | #include <sys/syscall_stats.h> |
36 | #include <sys/syscallvar.h> |
37 | |
38 | /* |
39 | * MI indirect system call support. |
40 | * Included from sys_indirect.c and compat/netbsd32/netbsd32_indirect.c |
41 | * |
42 | * SYS_SYSCALL is set to the required function name. |
43 | */ |
44 | |
45 | #define CONCAT(a,b) __CONCAT(a,b) |
46 | |
47 | int |
48 | SYS_SYSCALL(struct lwp *l, const struct CONCAT(SYS_SYSCALL, _args) *uap, |
49 | register_t *rval) |
50 | { |
51 | /* { |
52 | syscallarg(int) code; |
53 | syscallarg(register_t) args[SYS_MAXSYSARGS]; |
54 | } */ |
55 | const struct sysent *callp; |
56 | struct proc *p = l->l_proc; |
57 | int code; |
58 | int error; |
59 | #ifdef NETBSD32_SYSCALL |
60 | register_t args64[SYS_MAXSYSARGS]; |
61 | int i, narg; |
62 | #define TRACE_ARGS args64 |
63 | #else |
64 | #define TRACE_ARGS &SCARG(uap, args[0]) |
65 | #endif |
66 | |
67 | callp = p->p_emul->e_sysent; |
68 | |
69 | code = SCARG(uap, code) & (SYS_NSYSENT - 1); |
70 | SYSCALL_COUNT(syscall_counts, code); |
71 | callp += code; |
72 | |
73 | if (__predict_false(callp->sy_flags & SYCALL_INDIRECT)) |
74 | return ENOSYS; |
75 | |
76 | if (__predict_true(!p->p_trace_enabled)) |
77 | return sy_call(callp, l, &uap->args, rval); |
78 | |
79 | #ifdef NETBSD32_SYSCALL |
80 | narg = callp->sy_narg; |
81 | for (i = 0; i < narg; i++) |
82 | args64[i] = SCARG(uap, args[i]); |
83 | #endif |
84 | |
85 | error = trace_enter(code, callp, TRACE_ARGS); |
86 | if (__predict_false(error != 0)) |
87 | return error; |
88 | error = sy_call(callp, l, &uap->args, rval); |
89 | trace_exit(code, callp, &uap->args, rval, error); |
90 | return error; |
91 | |
92 | #undef TRACE_ARGS |
93 | } |
94 | |