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      1 /* $NetBSD: syscall.c,v 1.9 2019/04/06 11:54:20 kamil Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2006 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  *
      8  * Author:
      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 
     33 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     34 
     35 __KERNEL_RCSID(0, "$NetBSD: syscall.c,v 1.9 2019/04/06 11:54:20 kamil Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/proc.h>
     40 
     41 #include <machine/frame.h>
     42 #include <machine/userret.h>
     43 
     44 void	syscall_intern(struct proc *);
     45 void	syscall_plain(struct lwp *, u_int64_t, struct trapframe *);
     46 void	syscall_fancy(struct lwp *, u_int64_t, struct trapframe *);
     47 
     48 void
     49 syscall_intern(struct proc *p)
     50 {
     51 
     52 	if (trace_is_enabled(p))
     53 		p->p_md.md_syscall = syscall_fancy;
     54 	else
     55 		p->p_md.md_syscall = syscall_plain;
     56 }
     57 
     58 /*
     59  * Process a system call.
     60  */
     61 void
     62 syscall_plain(struct lwp *l, u_int64_t code, struct trapframe *framep)
     63 {
     64 	panic("XXX %s: not implemented\n", __func__);
     65 	return;
     66 }
     67 
     68 void
     69 syscall_fancy(struct lwp *l, u_int64_t code, struct trapframe *framep)
     70 {
     71 	panic("XXX %s: not implemented\n", __func__);
     72 	return;
     73 }
     74 
     75 /*
     76  * Process the tail end of a fork() for the child.
     77  */
     78 void
     79 md_child_return(struct lwp *l)
     80 {
     81 	panic("XXX %s: not implemented\n", __func__);
     82 }
     83 
     84 /*
     85  * Process the tail end of a posix_spawn() for the child.
     86  */
     87 void
     88 cpu_spawn_return(struct lwp *l)
     89 {
     90 
     91 	userret(l);
     92 }
     93