mmap.c

来自「Axis 221 camera embedded programing inte」· C语言 代码 · 共 31 行

/* vi: set sw=4 ts=4: */
/*
 * _mmap() for uClibc
 *
 * Copyright (C) 2000-2004 by Erik Andersen <[e-mail]>
 *
 * GNU Library General Public License (LGPL) version 2 or later.
 */

#include "syscalls.h"
#include <unistd.h>
#include <sys/mman.h>

#ifdef __NR_mmap
#define __NR__mmap __NR_mmap
_syscall1(__ptr_t, _mmap, unsigned long *, buffer);
__ptr_t mmap(__ptr_t addr, size_t len, int prot,
			 int flags, int fd, __off_t offset)
{
	unsigned long buffer[6];

	buffer[0] = (unsigned long) addr;
	buffer[1] = (unsigned long) len;
	buffer[2] = (unsigned long) prot;
	buffer[3] = (unsigned long) flags;
	buffer[4] = (unsigned long) fd;
	buffer[5] = (unsigned long) offset;
	return (__ptr_t) _mmap(buffer);
}
#endif