1 /* 2 * Check decoding of prctl PR_GET_TSC/PR_SET_TSC operations. 3 * 4 * Copyright (c) 2016 JingPiao Chen <chenjingpiao (at) foxmail.com> 5 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr (at) gmail.com> 6 * Copyright (c) 2016-2017 The strace developers. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "tests.h" 33 #include <asm/unistd.h> 34 #include <linux/prctl.h> 35 36 #if defined __NR_prctl && defined PR_GET_TSC && defined PR_SET_TSC 37 38 # include <stdio.h> 39 # include <unistd.h> 40 41 int 42 main(void) 43 { 44 static const kernel_ulong_t bogus_tsc = 45 (kernel_ulong_t) 0xdeadc0defacebeefULL; 46 47 TAIL_ALLOC_OBJECT_CONST_PTR(int, tsc); 48 long rc; 49 50 rc = syscall(__NR_prctl, PR_SET_TSC, 0); 51 printf("prctl(PR_SET_TSC, 0 /* PR_TSC_??? */) = %s\n", sprintrc(rc)); 52 53 rc = syscall(__NR_prctl, PR_SET_TSC, bogus_tsc); 54 printf("prctl(PR_SET_TSC, %#x /* PR_TSC_??? */) = %s\n", 55 (unsigned int) bogus_tsc, sprintrc(rc)); 56 57 rc = syscall(__NR_prctl, PR_SET_TSC, PR_TSC_SIGSEGV); 58 printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV) = %s\n", sprintrc(rc)); 59 60 rc = syscall(__NR_prctl, PR_GET_TSC, NULL); 61 printf("prctl(PR_GET_TSC, NULL) = %s\n", sprintrc(rc)); 62 63 rc = syscall(__NR_prctl, PR_GET_TSC, tsc + 1); 64 printf("prctl(PR_GET_TSC, %p) = %s\n", tsc + 1, sprintrc(rc)); 65 66 rc = syscall(__NR_prctl, PR_GET_TSC, tsc); 67 if (rc) 68 printf("prctl(PR_GET_TSC, %p) = %s\n", tsc, sprintrc(rc)); 69 else 70 printf("prctl(PR_GET_TSC, [PR_TSC_SIGSEGV]) = %s\n", 71 sprintrc(rc)); 72 73 puts("+++ exited with 0 +++"); 74 return 0; 75 } 76 77 #else 78 79 SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_TSC && PR_SET_TSC") 80 81 #endif 82
