1d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes/* 2d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Check decoding of prctl PR_GET_TSC/PR_SET_TSC operations. 3d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 4d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2016 JingPiao Chen <chenjingpiao@foxmail.com> 5d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com> 639bac055674d23770b9a724221b728e443196ea7Elliott Hughes * Copyright (c) 2016-2017 The strace developers. 7d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * All rights reserved. 8d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 9d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Redistribution and use in source and binary forms, with or without 10d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * modification, are permitted provided that the following conditions 11d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * are met: 12d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 1. Redistributions of source code must retain the above copyright 13d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer. 14d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright 15d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer in the 16d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * documentation and/or other materials provided with the distribution. 17d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 3. The name of the author may not be used to endorse or promote products 18d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * derived from this software without specific prior written permission. 19d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 20d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes */ 31d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 32d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include "tests.h" 33d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <asm/unistd.h> 34d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <linux/prctl.h> 35d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 36d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#if defined __NR_prctl && defined PR_GET_TSC && defined PR_SET_TSC 37d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 38d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# include <stdio.h> 39d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# include <unistd.h> 40d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 41d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesint 42d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesmain(void) 43d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 44d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const kernel_ulong_t bogus_tsc = 45d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes (kernel_ulong_t) 0xdeadc0defacebeefULL; 46d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 4739bac055674d23770b9a724221b728e443196ea7Elliott Hughes TAIL_ALLOC_OBJECT_CONST_PTR(int, tsc); 48d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes long rc; 49d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 50d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_prctl, PR_SET_TSC, 0); 51d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("prctl(PR_SET_TSC, 0 /* PR_TSC_??? */) = %s\n", sprintrc(rc)); 52d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 53d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_prctl, PR_SET_TSC, bogus_tsc); 54d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("prctl(PR_SET_TSC, %#x /* PR_TSC_??? */) = %s\n", 55d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes (unsigned int) bogus_tsc, sprintrc(rc)); 56d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 57d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_prctl, PR_SET_TSC, PR_TSC_SIGSEGV); 58d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV) = %s\n", sprintrc(rc)); 59d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 60d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_prctl, PR_GET_TSC, NULL); 61d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("prctl(PR_GET_TSC, NULL) = %s\n", sprintrc(rc)); 62d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 63d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_prctl, PR_GET_TSC, tsc + 1); 64d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("prctl(PR_GET_TSC, %p) = %s\n", tsc + 1, sprintrc(rc)); 65d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 66d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_prctl, PR_GET_TSC, tsc); 67d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (rc) 68d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("prctl(PR_GET_TSC, %p) = %s\n", tsc, sprintrc(rc)); 69d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes else 70d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("prctl(PR_GET_TSC, [PR_TSC_SIGSEGV]) = %s\n", 71d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes sprintrc(rc)); 72d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 73d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes puts("+++ exited with 0 +++"); 74d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return 0; 75d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 76d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 77d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#else 78d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 79d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott HughesSKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_TSC && PR_SET_TSC") 80d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 81d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#endif 82