99 lines
3.8 KiB
C
99 lines
3.8 KiB
C
/*
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* Copyright (c) 2011, Stefan Lankes, RWTH Aachen University
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @author Stefan Lankes
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* @file arch/x86/include/asm/syscall.h
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* @brief Systemcall related code
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*
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* This file defines the syscall function and convenience
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* based macro definitions for calling it.
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*/
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#ifndef __ARCH_SYSCALL_H__
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#define __ARCH_SYSCALL_H__
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#include <eduos/stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define _STR(token) #token
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#define _SYSCALLSTR(x) "int $" _STR(x) " "
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/** @brief the syscall function which issues an interrupt to the kernel
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*
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* It's supposed to be used by the macros defined in this file as the could would read
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* cleaner then.
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*
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* @param nr System call number
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* @param arg0 Argument 0
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* @param arg1 Argument 1
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* @param arg2 Argument 2
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* @param arg3 Argument 3
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* @param arg4 Argument 4
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* @return The return value of the system call
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*/
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inline static long
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syscall(int nr, unsigned long arg0, unsigned long arg1, unsigned long arg2,
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unsigned long arg3, unsigned long arg4)
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{
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long res;
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asm volatile (_SYSCALLSTR(INT_SYSCALL)
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: "=a" (res)
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: "0" (nr), "b" (arg0), "c" (arg1), "d" (arg2), "S" (arg3), "D" (arg4)
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: "memory", "cc");
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return res;
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}
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/// System call macro with one single argument; the syscall number
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#define SYSCALL0(NR) \
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syscall(NR, 0, 0, 0, 0, 0)
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/// System call macro with system call number and one argument
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#define SYSCALL1(NR, ARG1) \
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syscall(NR, (unsigned long)ARG1, 0, 0, 0, 0)
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/// System call macro with system call number and 2 arguments
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#define SYSCALL2(NR, ARG1, ARG2) \
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syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, 0, 0, 0)
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/// System call macro with system call number and 3 arguments
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#define SYSCALL3(NR, ARG1, ARG2, ARG3) \
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syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, (unsigned long)ARG3, 0, 0)
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/// System call macro with system call number and 4 arguments
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#define SYSCALL4(NR, ARG1, ARG2, ARG3, ARG4) \
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syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, (unsigned long)ARG3, (unsigned long) ARG4, 0)
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/// System call macro with system call number and 5 arguments
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#define SYSCALL5(NR, ARG1, ARG2, ARG3, ARG4) \
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syscall(NR, (unsigned long)ARG1, (unsigned long)ARG2, (unsigned long)ARG3, (unsigned long) ARG4, (unsigned long) ARG5)
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#ifdef __cplusplus
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}
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#endif
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#endif
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