[mirror_ubuntu-zesty-kernel.git] / arch / um / sys-x86_64 / unmap.c

/*
 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
 * Licensed under the GPL
 */

#include <linux/mman.h>
#include <asm/unistd.h>

static int errno;

static inline _syscall2(int,munmap,void *,start,size_t,len)
static inline _syscall6(void *,mmap,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset)
int switcheroo(int fd, int prot, void *from, void *to, int size)
{
	if(munmap(to, size) < 0){
		return(-1);
	}
	if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){
		return(-1);
	}
	if(munmap(from, size) < 0){
		return(-1);
	}
	return(0);
}
Commit	Line	Data
60b2737d PBG	1	/*
	2	* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
	3	* Licensed under the GPL
	4	*/
	5
	6	#include <linux/mman.h>
	7	#include <asm/unistd.h>
	8
	9	static int errno;
	10
	11	static inline _syscall2(int,munmap,void *,start,size_t,len)
	12	static inline _syscall6(void ,mmap,void ,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset)
	13	int switcheroo(int fd, int prot, void from, void to, int size)
	14	{
	15	if(munmap(to, size) < 0){
	16	return(-1);
	17	}
1feb8d2d	18	if(mmap(to, size, prot, MAP_SHARED \| MAP_FIXED, fd, 0) == (void*) -1){
60b2737d PBG	19	return(-1);
	20	}
	21	if(munmap(from, size) < 0){
	22	return(-1);
	23	}
	24	return(0);
	25	}