1 | /* Check incompatibility with legacy JIT engine. |
2 | Copyright (C) 2020-2024 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 <stdlib.h> |
21 | #include <sys/platform/x86.h> |
22 | #include <sys/mman.h> |
23 | #include <support/test-driver.h> |
24 | #include <support/xsignal.h> |
25 | #include <support/xunistd.h> |
26 | |
27 | /* Check that mmapped legacy code trigges segfault with -fcf-protection. */ |
28 | |
29 | static int |
30 | do_test (void) |
31 | { |
32 | void (*funcp) (void); |
33 | funcp = xmmap (NULL, length: 0x1000, PROT_EXEC | PROT_READ | PROT_WRITE, |
34 | MAP_ANONYMOUS | MAP_PRIVATE, fd: -1); |
35 | printf (format: "mmap = %p\n" , funcp); |
36 | /* Write RET instruction. */ |
37 | *(char *) funcp = 0xc3; |
38 | funcp (); |
39 | |
40 | /* NB: This test should trigger SIGSEGV when IBT is active. We should |
41 | reach here if IBT isn't active. */ |
42 | if (!CPU_FEATURE_ACTIVE (IBT)) |
43 | return EXIT_UNSUPPORTED; |
44 | |
45 | return EXIT_FAILURE; |
46 | } |
47 | |
48 | #define EXPECTED_SIGNAL (CPU_FEATURE_ACTIVE (IBT) ? SIGSEGV : 0) |
49 | #include <support/test-driver.c> |
50 | |