1 /* Check compatibility of legacy executable with a JIT engine.
2 Copyright (C) 2020-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <stdio.h>
20 #include <sys/mman.h>
21 #include <support/xunistd.h>
22
23 /* Check that mmapped legacy code works with -fcf-protection=none. */
24
25 static int
do_test(void)26 do_test (void)
27 {
28 void (*funcp) (void);
29 funcp = xmmap (NULL, 0x1000, PROT_EXEC | PROT_READ | PROT_WRITE,
30 MAP_ANONYMOUS | MAP_PRIVATE, -1);
31 printf ("mmap = %p\n", funcp);
32 /* Write RET instruction. */
33 *(char *) funcp = 0xc3;
34 funcp ();
35 return 0;
36 }
37
38 #include <support/test-driver.c>
39