1 /*
2  * Copyright (c) 2018 Todd Mortimer <mortimer@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20 
21 #include "../pivot.h"
22 
23 void doexit() {
24     _exit(0);
25 }
26 
27 int main() {
28     /* set up an alt stack on the heap that just calls doexit */
29     size_t *newstack = calloc(10, sizeof(size_t));
30     printf("non-MAP_STACK stack at %p\n", newstack);
31     newstack[0] = (size_t)doexit;
32     pivot(newstack);
33     return 0;
34 }
35