1 /* Test CET property note parser for [BZ #23467]. 2 Copyright (C) 2018-2022 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 <stdlib.h> 20 #include <stdio.h> 21 #include <string.h> 22 #include <signal.h> 23 #include <support/check.h> 24 25 extern void bar (void); 26 27 void 28 __attribute__ ((noclone, noinline)) test(void (* func_p)(void))29test (void (*func_p) (void)) 30 { 31 func_p (); 32 } 33 34 /* bar contains an IBT violation if it is called indirectly via a 35 function pointer. On IBT machines, it should lead to segfault 36 unless IBT is disabled by error. */ 37 38 static void sig_handler(int signo)39sig_handler (int signo) 40 { 41 exit (EXIT_SUCCESS); 42 } 43 44 static int do_test(void)45do_test (void) 46 { 47 char buf[4]; 48 49 if (scanf ("%3s", buf) != 1) 50 FAIL_UNSUPPORTED ("IBT not supported"); 51 52 if (strcmp (buf, "IBT") != 0) 53 FAIL_UNSUPPORTED ("IBT not supported"); 54 55 TEST_VERIFY_EXIT (signal (SIGSEGV, &sig_handler) != SIG_ERR); 56 57 /* Call bar via a function pointer to force an IBT violation. */ 58 test (bar); 59 60 return EXIT_FAILURE; 61 } 62 63 #include <support/test-driver.c> 64