File: [cvs.NetBSD.org] / src / lib / libc / arch / x86_64 / SYS.h (download)
Revision 1.2, Mon Jan 14 00:55:57 2002 UTC (22 years, 2 months ago) by thorpej
Branch: MAIN
CVS Tags: netbsd-1-6-base, netbsd-1-6-RELEASE, netbsd-1-6-RC3, netbsd-1-6-RC2, netbsd-1-6-RC1, netbsd-1-6-PATCH002-RELEASE, netbsd-1-6-PATCH002-RC4, netbsd-1-6-PATCH002-RC3, netbsd-1-6-PATCH002-RC2, netbsd-1-6-PATCH002-RC1, netbsd-1-6-PATCH002, netbsd-1-6-PATCH001-RELEASE, netbsd-1-6-PATCH001-RC3, netbsd-1-6-PATCH001-RC2, netbsd-1-6-PATCH001-RC1, netbsd-1-6-PATCH001, netbsd-1-6 Changes since 1.1: +4 -1
lines
* Add WSYSCALL() to SYS.h, which creates a system call with an
internal name and a weak alias for the name.
* Add a WEAKASM syscall list, and process it.
* Make sysarch() have an internal name (_sysarch()).
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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
*
* from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
* $NetBSD: SYS.h,v 1.2 2002/01/14 00:55:57 thorpej Exp $
*/
/*
* XXXfvdl change to use syscall/sysret.
*/
#include <machine/asm.h>
#include <sys/syscall.h>
#ifdef __STDC__
#define SYSTRAP(x) movl $(SYS_ ## x),%eax; int $0x80
#else
#define SYSTRAP(x) movl $(SYS_/**/x),%eax; int $0x80
#endif
#define CERROR _C_LABEL(__cerror)
#define CURBRK _C_LABEL(__curbrk)
#define _SYSCALL_NOERROR(x,y) \
ENTRY(x); \
SYSTRAP(y)
#ifdef PIC
#define _SYSCALL(x,y) \
.text; _ALIGN_TEXT; \
2: mov PIC_GOT(CERROR), %rcx; \
jmp *%rcx; \
_SYSCALL_NOERROR(x,y); \
jc 2b
#else
#define _SYSCALL(x,y) \
.text; _ALIGN_TEXT; \
2: jmp CERROR; \
_SYSCALL_NOERROR(x,y); \
jc 2b
#endif
#define SYSCALL_NOERROR(x) \
_SYSCALL_NOERROR(x,x)
#define SYSCALL(x) \
_SYSCALL(x,x)
#define PSEUDO_NOERROR(x,y) \
_SYSCALL_NOERROR(x,y); \
ret
#define PSEUDO(x,y) \
_SYSCALL(x,y); \
ret
#define RSYSCALL_NOERROR(x) \
PSEUDO_NOERROR(x,x)
#define RSYSCALL(x) \
PSEUDO(x,x)
#define WSYSCALL(weak,strong) \
WEAK_ALIAS(weak,strong); \
PSEUDO(strong,weak)
.globl CERROR