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script3r
GitHub Repository: script3r/os161
 Path: blob/master/kern/include/syscall.h
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/*

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 * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009

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 *	The President and Fellows of Harvard College.

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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

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 * are met:

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 * 1. 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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 * 2. 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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 * 3. 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 software

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 *    without specific prior written permission.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _SYSCALL_H_

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#define _SYSCALL_H_

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struct trapframe; /* from <machine/trapframe.h> */

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/*

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 * The system call dispatcher.

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 */

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void syscall(struct trapframe *tf);

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/*

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 * Support functions.

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 */

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/* Helper for fork(). You write this. */

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void enter_forked_process(struct trapframe *tf);

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/* Enter user mode. Does not return. */

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void enter_new_process(int argc, userptr_t argv, vaddr_t stackptr,

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		       vaddr_t entrypoint);

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/*

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 * Prototypes for IN-KERNEL entry points for system call implementations.

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 */

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int sys_reboot(int code);

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int sys___time(userptr_t user_seconds, userptr_t user_nanoseconds);

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/*

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 * I/O syscalls

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 */

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int	sys_open( userptr_t, int, int *);

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int 	sys_close( int );

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int	sys_write( int, userptr_t, size_t,  int * );

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int	sys_read( int, userptr_t, size_t, int * );

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int	sys___getcwd( userptr_t, size_t, int * );

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int	sys_lseek( int, off_t, int, int64_t * );

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int	sys_dup2( int, int, int * );

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int	sys_chdir( userptr_t );

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/**

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 * Process System Calls

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 */

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int	sys_getpid( int * );

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void	sys__exit( int );

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int	sys_waitpid( int, userptr_t, int, int * );

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int	sys_fork( struct trapframe *, int * );

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int	sys_execv( userptr_t, userptr_t );

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int	sys_sbrk( intptr_t, void ** );

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/**

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 * Kernel versions of the system calls.

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 */

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int	___waitpid( int, int *, int );

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#endif /* _SYSCALL_H_ */

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