1d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes/* 2d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Check decoding of lookup_dcookie syscall. 3d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 4d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com> 5d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * All rights reserved. 6d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 7d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Redistribution and use in source and binary forms, with or without 8d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * modification, are permitted provided that the following conditions 9d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * are met: 10d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 1. Redistributions of source code must retain the above copyright 11d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer. 12d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright 13d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer in the 14d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * documentation and/or other materials provided with the distribution. 15d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 3. The name of the author may not be used to endorse or promote products 16d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * derived from this software without specific prior written permission. 17d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 18d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes */ 29d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 30d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include "tests.h" 31d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 32d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <asm/unistd.h> 33d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 34d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#ifdef __NR_lookup_dcookie 35d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 36d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# include <inttypes.h> 37d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# include <limits.h> 38d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# include <stdio.h> 39d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# include <unistd.h> 40d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 41d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesstatic void 42d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesdo_lookup_cookie(uint64_t cookie, char *buf, kernel_ulong_t len) 43d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 44d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes long rc; 45d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes const char *errstr; 46d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 47d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# if (LONG_MAX > INT_MAX) \ 48d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes || (defined __x86_64__ && defined __ILP32__) \ 49d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes || defined LINUX_MIPSN32 50d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_lookup_dcookie, cookie, buf, len); 51d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# else 52d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes rc = syscall(__NR_lookup_dcookie, LL_VAL_TO_PAIR(cookie), buf, len); 53d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes# endif 54d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 55d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes errstr = sprintrc(rc); 56d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("lookup_dcookie(%" PRIu64 ", ", cookie); 57d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 58d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes /* Here, we trust successful return code */ 59d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if ((rc >= 0) && (rc < (long) INT_MAX)) { 60d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("%.*s, ", (int) rc, buf); 61d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } else { 62d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (buf != NULL) 63d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("%p, ", buf); 64d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes else 65d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("NULL, "); 66d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } 67d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 68d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes printf("%" PRIu64 ") = %s\n", (uint64_t) len, errstr); 69d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 70d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 71d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesint 72d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesmain(void) 73d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 74d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes enum { BUF_SIZE = 4096 }; 75d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 76d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const uint64_t bogus_cookie = 77d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes (uint64_t) 0xf157feeddeadfaceULL; 78d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes static const kernel_ulong_t bogus_len = 79d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes (kernel_ulong_t) 0xbadc0dedda7a1057ULL; 80d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 81d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes char *buf = tail_alloc(BUF_SIZE); 82d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 83d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes do_lookup_cookie(0, NULL, 0); 84d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes do_lookup_cookie(bogus_cookie, buf + BUF_SIZE, bogus_len); 85d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes do_lookup_cookie(bogus_cookie, buf, BUF_SIZE); 86d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 87d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes puts("+++ exited with 0 +++"); 88d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 89d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return 0; 90d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 91d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 92d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#else 93d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 94d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott HughesSKIP_MAIN_UNDEFINED("__NR_lookup_dcookie"); 95d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 96d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#endif 97