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/*
* 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 *,mmap2,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(mmap2(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) != to){
return(-1);
}
if(munmap(from, size) < 0){
return(-1);
}
return(0);
}
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