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/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* $OpenBSD: SYS.h,v 1.3 1999/01/06 06:12:02 d Exp $
*/
#include <machine/asm.h>
#include <sys/syscall.h>
#include <machine/trap.h>
#ifdef __STDC__
#define _CAT(x,y) x##y
#define __ENTRY(p,x) ENTRY(p##x)
#else
#define _CAT(x,y) x/**/y
#define __ENTRY(p,x) ENTRY(p/**/x)
#endif
/*
* ERROR branches to cerror. This is done with a macro so that I can
* change it to be position independent later, if need be.
*/
#ifdef PIC
#define ERROR() \
PIC_PROLOGUE(%g1,%g2); \
ld [%g1+cerror],%g2; jmp %g2; nop
#else
#define ERROR() \
sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop
#endif
/*
* SYSCALL is used when further action must be taken before returning.
* Note that it adds a `nop' over what we could do, if we only knew what
* came at label 1....
*/
#define __SYSCALL(p,x) \
__ENTRY(p,x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
/*
* RSYSCALL is used when the system call should just return. Here
* we use the SYSCALL_G2RFLAG to put the `success' return address in %g2
* and avoid a branch.
*/
#define __RSYSCALL(p,x) \
__ENTRY(p,x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
t ST_SYSCALL; ERROR()
/*
* PSEUDO(x,y) is like RSYSCALL(y) except that the name is x.
*/
#define __PSEUDO(p,x,y) \
__ENTRY(p,x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
t ST_SYSCALL; ERROR()
#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)
#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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