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      1 /* $NetBSD: syscallemu.h,v 1.1 2012/01/05 13:26:51 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2012 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _HAVE_SYSCALLEMU_H
     30 #define _HAVE_SYSCALLEMU_H
     31 
     32 #include <sys/cdefs.h>
     33 #include <sys/syscall.h>
     34 #include <sys/syscallargs.h>
     35 
     36 struct proc;
     37 
     38 /*
     39  * Process specific syscallemu configuration
     40  */
     41 struct syscallemu_data {
     42 	vaddr_t		sce_user_start;
     43 	vaddr_t		sce_user_end;
     44 	void		*sce_md_syscall;
     45 };
     46 
     47 /*
     48  * Get process specific syscallemu data
     49  */
     50 struct syscallemu_data *	syscallemu_getsce(struct proc *);
     51 
     52 /*
     53  * Set process specific syscallemu data
     54  */
     55 void	syscallemu_setsce(struct proc *, struct syscallemu_data *);
     56 
     57 /*
     58  * MD specific syscallemu syscall setup (in syscallemu_${MACHINE_ARCH}.c)
     59  */
     60 void *	md_syscallemu(struct proc *);
     61 
     62 /* syscall: "syscallemu" ret: "int" args: "uintptr_t" "uintptr_t" */
     63 #define	SYS_syscallemu		511
     64 
     65 struct sys_syscallemu_args {
     66 	syscallarg(uintptr_t)	user_start;
     67 	syscallarg(uintptr_t)	user_end;
     68 };
     69 check_syscall_args(sys_syscallemu);
     70 
     71 int	sys_syscallemu(struct lwp *, const struct sys_syscallemu_args *,
     72 		       register_t *);
     73 
     74 __CTASSERT(SYS_syscallemu >= SYS_MAXSYSCALL);
     75 __CTASSERT(SYS_syscallemu < SYS_NSYSENT);
     76 
     77 #endif /* !_HAVE_SYSCALLEMU_H */
     78