1 /* 2 * Check decoding of "old mmap" edition of mmap syscall. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * Copyright (c) 2016-2018 The strace developers. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "tests.h" 32 #include <asm/unistd.h> 33 34 /* 35 * On s390x and m68k, this is the mmap syscall used by glibc, so, 36 * from one side, it's already covered by another test, and, from another side, 37 * it would require additional efforts to filter out mmap calls made by glibc. 38 */ 39 40 #if defined __NR_mmap \ 41 && (defined __arm__ || defined __i386__ || defined __m68k__ \ 42 || defined __s390__ || defined __s390x__) \ 43 && (defined PATH_TRACING || !(defined __s390x__ || defined __m68k__)) 44 45 # include <stdio.h> 46 # include <string.h> 47 # include <sys/mman.h> 48 # include <unistd.h> 49 50 # ifndef TEST_FD 51 # define TEST_FD -2LU 52 # endif 53 54 int 55 main(void) 56 { 57 long rc = syscall(__NR_mmap, 0); 58 # ifndef PATH_TRACING 59 printf("mmap(NULL) = %ld %s (%m)\n", rc, errno2name()); 60 # endif 61 62 const unsigned long args1_c[6] = { 63 (unsigned long) 0xbadc0deddeadbeefULL, /* addr */ 64 (unsigned long) 0xdeefacedfacefeedULL, /* len */ 65 PROT_READ|PROT_EXEC, /* prot */ 66 MAP_FILE|MAP_FIXED, /* flags */ 67 TEST_FD, /* fd */ 68 (unsigned long) 0xdecaffedbadc0dedULL /* offset */ 69 }; 70 const unsigned long page_size = get_page_size(); 71 const unsigned long args2_c[6] = { 72 0, 73 page_size, 74 PROT_READ|PROT_WRITE, 75 MAP_PRIVATE|MAP_ANONYMOUS, 76 -1LU, 77 (unsigned long) 0xda7a1057faced000ULL & -page_size 78 }; 79 void *args = tail_memdup(args1_c, sizeof(args1_c)); 80 81 rc = syscall(__NR_mmap, args); 82 printf("mmap(%#lx, %lu, PROT_READ|PROT_EXEC, MAP_FILE|MAP_FIXED" 83 ", %d, %#lx) = %ld %s (%m)\n", 84 args1_c[0], args1_c[1], (int) args1_c[4], args1_c[5], 85 rc, errno2name()); 86 87 memcpy(args, args2_c, sizeof(args2_c)); 88 rc = syscall(__NR_mmap, args); 89 # ifndef PATH_TRACING 90 printf("mmap(NULL, %lu, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS" 91 ", %d, %#lx) = %#lx\n", 92 args2_c[1], (int) args2_c[4], args2_c[5], rc); 93 # endif 94 95 void *addr = (void *) rc; 96 if (mprotect(addr, page_size, PROT_NONE)) 97 perror_msg_and_fail("mprotect(%p, %lu, PROT_NONE)", 98 addr, page_size); 99 100 puts("+++ exited with 0 +++"); 101 return 0; 102 } 103 104 #else 105 106 SKIP_MAIN_UNDEFINED("defined __NR_mmap " 107 "&& (defined __arm__ || defined __i386__ || defined __m68k__ " 108 "|| defined __s390__ || defined __s390x__) " 109 "&& (defined PATH_TRACING || !(defined __s390x__ || defined __m68k__))") 110 111 #endif 112
