| /* |
| * 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) == (void*) -1 ){ |
| return(-1); |
| } |
| if(munmap(from, size) < 0){ |
| return(-1); |
| } |
| return(0); |
| } |