sys_syscall.c revision 1.7.2.2
1 1.7.2.2 matt /* $NetBSD: sys_syscall.c,v 1.7.2.2 2008/01/09 01:56:23 matt Exp $ */ 2 1.7.2.2 matt 3 1.7.2.2 matt /*- 4 1.7.2.2 matt * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 1.7.2.2 matt * All rights reserved. 6 1.7.2.2 matt * 7 1.7.2.2 matt * This code is derived from software contributed to The NetBSD Foundation 8 1.7.2.2 matt * by David Laight. 9 1.7.2.2 matt * 10 1.7.2.2 matt * Redistribution and use in source and binary forms, with or without 11 1.7.2.2 matt * modification, are permitted provided that the following conditions 12 1.7.2.2 matt * are met: 13 1.7.2.2 matt * 1. Redistributions of source code must retain the above copyright 14 1.7.2.2 matt * notice, this list of conditions and the following disclaimer. 15 1.7.2.2 matt * 2. Redistributions in binary form must reproduce the above copyright 16 1.7.2.2 matt * notice, this list of conditions and the following disclaimer in the 17 1.7.2.2 matt * documentation and/or other materials provided with the distribution. 18 1.7.2.2 matt * 3. Neither the name of The NetBSD Foundation nor the names of its 19 1.7.2.2 matt * contributors may be used to endorse or promote products derived 20 1.7.2.2 matt * from this software without specific prior written permission. 21 1.7.2.2 matt * 22 1.7.2.2 matt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 1.7.2.2 matt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 1.7.2.2 matt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 1.7.2.2 matt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 1.7.2.2 matt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 1.7.2.2 matt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 1.7.2.2 matt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 1.7.2.2 matt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 1.7.2.2 matt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 1.7.2.2 matt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 1.7.2.2 matt * POSSIBILITY OF SUCH DAMAGE. 33 1.7.2.2 matt */ 34 1.7.2.2 matt 35 1.7.2.2 matt #include <sys/cdefs.h> 36 1.7.2.2 matt __KERNEL_RCSID(0, "$NetBSD: sys_syscall.c,v 1.7.2.2 2008/01/09 01:56:23 matt Exp $"); 37 1.7.2.2 matt 38 1.7.2.2 matt #include <sys/syscall_stats.h> 39 1.7.2.2 matt 40 1.7.2.2 matt /* 41 1.7.2.2 matt * MI indirect system call support. 42 1.7.2.2 matt * Included from sys_indirect.c and compat/netbsd32/netbsd32_indirect.c 43 1.7.2.2 matt * 44 1.7.2.2 matt * SYS_SYSCALL is set to the required function name. 45 1.7.2.2 matt */ 46 1.7.2.2 matt 47 1.7.2.2 matt #define CONCAT(a,b) __CONCAT(a,b) 48 1.7.2.2 matt 49 1.7.2.2 matt int 50 1.7.2.2 matt SYS_SYSCALL(struct lwp *l, const struct CONCAT(SYS_SYSCALL, _args) *uap, 51 1.7.2.2 matt register_t *rval) 52 1.7.2.2 matt { 53 1.7.2.2 matt /* { 54 1.7.2.2 matt syscallarg(int) code; 55 1.7.2.2 matt syscallarg(register_t) args[SYS_MAXSYSARGS]; 56 1.7.2.2 matt } */ 57 1.7.2.2 matt const struct sysent *callp; 58 1.7.2.2 matt struct proc *p = l->l_proc; 59 1.7.2.2 matt int code; 60 1.7.2.2 matt int error; 61 1.7.2.2 matt #ifdef NETBSD32_SYSCALL 62 1.7.2.2 matt register_t args64[SYS_MAXSYSARGS]; 63 1.7.2.2 matt int i, narg; 64 1.7.2.2 matt #define TRACE_ARGS args64 65 1.7.2.2 matt #else 66 1.7.2.2 matt #define TRACE_ARGS &SCARG(uap, args[0]) 67 1.7.2.2 matt #endif 68 1.7.2.2 matt 69 1.7.2.2 matt callp = p->p_emul->e_sysent; 70 1.7.2.2 matt 71 1.7.2.2 matt code = SCARG(uap, code) & (SYS_NSYSENT - 1); 72 1.7.2.2 matt SYSCALL_COUNT(syscall_counts, code); 73 1.7.2.2 matt callp += code; 74 1.7.2.2 matt 75 1.7.2.2 matt if (__predict_false(callp->sy_flags & SYCALL_INDIRECT)) 76 1.7.2.2 matt return ENOSYS; 77 1.7.2.2 matt 78 1.7.2.2 matt if (__predict_true(!p->p_trace_enabled)) 79 1.7.2.2 matt return callp->sy_call(l, &uap->args, rval); 80 1.7.2.2 matt 81 1.7.2.2 matt #ifdef NETBSD32_SYSCALL 82 1.7.2.2 matt narg = callp->sy_argsize >> 2; 83 1.7.2.2 matt for (i = 0; i < narg; i++) 84 1.7.2.2 matt args64[i] = SCARG(uap, args[i]); 85 1.7.2.2 matt #endif 86 1.7.2.2 matt 87 1.7.2.2 matt error = trace_enter(code, code, NULL, TRACE_ARGS); 88 1.7.2.2 matt if (__predict_false(error != 0)) 89 1.7.2.2 matt return error; 90 1.7.2.2 matt error = callp->sy_call(l, &uap->args, rval); 91 1.7.2.2 matt trace_exit(code, TRACE_ARGS, rval, error); 92 1.7.2.2 matt return error; 93 1.7.2.2 matt 94 1.7.2.2 matt #undef TRACE_ARGS 95 1.7.2.2 matt } 96
Indexes created Tue Sep 30 17:09:57 GMT 2025