metalsvm/arch/x86/include/asm/syscall.h

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/*
* Copyright (c) 2011, Stefan Lankes, Chair for Operating Systems,
* RWTH Aachen University
*
* 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 the Chair for Operating Systems,
* RWTH Aachen University.
* 4. Neither the name of the Chair for Operating Systems, RWTH Aachen 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 <COPYRIGHT HOLDER> ''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 <COPYRIGHT HOLDER> 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.
*
* This file is part of MetalSVM.
*/
/**
* @author Stefan Lankes
* @file arch/x86/include/asm/syscall.h
* @brief Systemcall related code
*
* This file defines the syscall function and convenience
* based macro definitions for calling it.
*/
#ifndef __ARCH_SYSCALL_H__
#define __ARCH_SYSCALL_H__
#include <metalsvm/stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
#define _STR(token) #token
#define _SYSCALLSTR(x) "int $" _STR(x) " "
/** @brief the syscall function which issues an interrupt to the kernel
*
* It's supposed to be used by the macros defined in this file as the could would read
* cleaner then.
*
* @param nr System call number
* @param arg0 Argument 0
* @param arg1 Argument 1
* @param arg2 Argument 2
* @param arg3 Argument 3
* @param arg4 Argument 4
* @return The return value of the system call
*/
inline static long
syscall(int nr, unsigned long arg0, unsigned long arg1, unsigned long arg2,
unsigned long arg3, unsigned long arg4)
{
long res;
asm volatile (_SYSCALLSTR(INT_SYSCALL)
: "=a" (res)
: "0" (nr), "b" (arg0), "c" (arg1), "d" (arg2), "S" (arg3), "D" (arg4)
: "memory", "cc");
return res;
}
/// System call macro with one single argument; the syscall number
#define SYSCALL0(NR) \
syscall(NR, 0, 0, 0, 0, 0)
/// System call macro with system call number and one argument
#define SYSCALL1(NR, ARG1) \
syscall(NR, (unsigned long)ARG1, 0, 0, 0, 0)
/// System call macro with system call number and 2 arguments
#define SYSCALL2(NR, ARG1, ARG2) \
syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, 0, 0, 0)
/// System call macro with system call number and 3 arguments
#define SYSCALL3(NR, ARG1, ARG2, ARG3) \
syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, (unsigned long)ARG3, 0, 0)
/// System call macro with system call number and 4 arguments
#define SYSCALL4(NR, ARG1, ARG2, ARG3, ARG4) \
syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, (unsigned long)ARG3, (unsigned long) ARG4, 0)
/// System call macro with system call number and 5 arguments
#define SYSCALL5(NR, ARG1, ARG2, ARG3, ARG4) \
syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, (unsigned long)ARG3, (unsigned long) ARG4, (unsigned long) ARG5)
#ifdef __cplusplus
}
#endif
#endif