1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
/*
* Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <linux/mman.h>
#include <asm/unistd.h>
#include <sys/syscall.h>
int switcheroo(int fd, int prot, void *from, void *to, int size)
{
if (syscall(__NR_munmap, to, size) < 0){
return(-1);
}
if (syscall(__NR_mmap, to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){
return(-1);
}
if (syscall(__NR_munmap, from, size) < 0){
return(-1);
}
return(0);
}
|
