| /* | |
| * 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); | |
| } |