1 /* Test CET property note parser.
2    Copyright (C) 2018-2021 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 <elf.h>
21 #include <tcb-offsets.h>
22 
23 /* This test prints out "IBT" if Intel indirect branch tracking (IBT)
24    is enabled at run-time, which is checked by tst-cet-property-2 to
25    verify that the IBT violation is caught on IBT machines.  */
26 
27 static int
do_test(void)28 do_test (void)
29 {
30   unsigned int feature_1;
31 #ifdef __x86_64__
32 # define SEG_REG "fs"
33 #else
34 # define SEG_REG "gs"
35 #endif
36   asm ("movl %%" SEG_REG ":%P1, %0"
37        : "=r" (feature_1) : "i" (FEATURE_1_OFFSET));
38   if ((feature_1 & GNU_PROPERTY_X86_FEATURE_1_IBT) != 0)
39     printf ("IBT\n");
40 
41   return 0;
42 }
43 
44 #include <support/test-driver.c>
45