mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
95 lines
3.6 KiB
C
95 lines
3.6 KiB
C
/*-
|
|
* 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
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/syscall.h>
|
|
#include "DEFS.h"
|
|
|
|
#define SYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); \
|
|
ENTRY(__CONCAT(_,x)); \
|
|
.weak CNAME(x); \
|
|
.set CNAME(x),CNAME(__CONCAT(_,x)); \
|
|
lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
|
|
|
|
#define RSYSCALL(x) SYSCALL(x); ret
|
|
|
|
#define PSEUDO(x,y) ENTRY(__CONCAT(_,x)); \
|
|
.weak CNAME(x); \
|
|
.set CNAME(x),CNAME(__CONCAT(_,x)); \
|
|
lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
|
|
|
|
/* gas messes up offset -- although we don't currently need it, do for BCS */
|
|
#define LCALL(x,y) .byte 0x9a ; .long y; .word x
|
|
|
|
/*
|
|
* Design note:
|
|
*
|
|
* The macros PSYSCALL() and PRSYSCALL() are intended for use where a
|
|
* syscall needs to be renamed in the threaded library. When building
|
|
* a normal library, they default to the traditional SYSCALL() and
|
|
* RSYSCALL(). This avoids the need to #ifdef _THREAD_SAFE everywhere
|
|
* that the renamed function needs to be called.
|
|
*/
|
|
#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 PSYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); \
|
|
ENTRY(__CONCAT(_thread_sys_,x)); \
|
|
lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
|
|
#define PRSYSCALL(x) PSYSCALL(x); ret
|
|
#define PPSEUDO(x,y) ENTRY(__CONCAT(_thread_sys_,x)); \
|
|
lea __CONCAT(SYS_,y), %eax; KERNCALL; ret
|
|
#else
|
|
/*
|
|
* The non-threaded library defaults to traditional syscalls where
|
|
* the function name matches the syscall name.
|
|
*/
|
|
#define PSYSCALL(x) SYSCALL(x)
|
|
#define PRSYSCALL(x) RSYSCALL(x)
|
|
#define PPSEUDO(x,y) PSEUDO(x,y)
|
|
#endif
|
|
|
|
#ifdef __ELF__
|
|
#define KERNCALL int $0x80 /* Faster */
|
|
#else
|
|
#define KERNCALL LCALL(7,0) /* The old way */
|
|
#endif
|