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/* $OpenBSD: SYS.h,v 1.2 1998/12/23 16:26:26 mickey Exp $ */
/*
* Copyright (c) 1998 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Michael Shalayeff.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/syscall.h>
#include <machine/asm.h>
#include <machine/vmparam.h>
#define __ENTRY(p,x) ENTRY(__CONCAT(p,x))
#define __EXIT(p,x) EXIT(__CONCAT(p,x))
#define __RSYSCALL(p,x) !\
__ENTRY(p,x) !\
stw rp, FM_ERP(sr0,sp) !\
ldil L%SYSCALLGATE, r1 !\
ble 4(sr7, r1) !\
ldi __CONCAT(SYS_,x),r22!\
or,<> r0,r22,r0 !\
ldw FM_ERP(sr0,sp),rp !\
__EXIT(p,x)
#define __PSEUDO(p,x,y) !\
__ENTRY(p,x) !\
stw rp, FM_ERP(sr0,sp) !\
ldil L%SYSCALLGATE, r1 !\
ble 4(sr7, r1) !\
ldi __CONCAT(SYS_,y),r22!\
or,<> r0,r22,r0 !\
ldw FM_ERP(sr0,sp),rp !\
__EXIT(p,x)
/*
* Design note:
*
* When the syscalls need to be renamed so they can be handled
* specially by the threaded library, these macros insert `_thread_sys_'
* in front of their name. This avoids the need to #ifdef _THREAD_SAFE
* everywhere that the renamed function needs to be called.
* The PASSTHRU macro is later used for system calls that don't need
* wrapping. (XXX its a shame the loader can't do this aliasing)
*/
#ifdef _THREAD_SAFE
/*
* For the thread_safe versions, we prepend _thread_sys_ to the function
* name so that the 'C' wrapper can go around the real name.
*/
# define SYSCALL(x) __SYSCALL(_thread_sys_,x)
# define RSYSCALL(x) __RSYSCALL(_thread_sys_,x)
# define PSEUDO(x,y) __PSEUDO(_thread_sys_,x,y)
/*# define SYSENTRY(x) __ENTRY(_thread_sys_,x)*/
/*# define PASSTHRU(x) __PASSTHRU(_thread_sys_,x)*/
#else _THREAD_SAFE
/*
* The non-threaded library defaults to traditional syscalls where
* the function name matches the syscall name.
*/
# define SYSCALL(x) __SYSCALL(,x)
# define RSYSCALL(x) __RSYSCALL(,x)
# define PSEUDO(x,y) __PSEUDO(,x,y)
/*# define SYSENTRY(x) __ENTRY(,x)*/
#endif _THREAD_SAFE
.globl cerror
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