2 * Check decoding of "old mmap" edition of mmap syscall.
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2019 The strace developers.
8 * SPDX-License-Identifier: GPL-2.0-or-later
15 * On s390x and m68k, this is the mmap syscall used by glibc, so,
16 * from one side, it's already covered by another test, and, from another side,
17 * it would require additional efforts to filter out mmap calls made by glibc.
20 #if defined __NR_mmap \
21 && (defined __arm__ || defined __i386__ || defined __m68k__ \
22 || defined __s390__ || defined __s390x__) \
23 && (defined PATH_TRACING || !(defined __s390x__ || defined __m68k__))
28 # include <sys/mman.h>
38 long rc = syscall(__NR_mmap, 0);
39 const bool implemented = rc != -1 || errno != ENOSYS;
41 printf("mmap(NULL) = %s\n", sprintrc(rc));
44 const unsigned long args1_c[6] = {
45 (unsigned long) 0xbadc0deddeadbeefULL, /* addr */
46 (unsigned long) 0xdeefacedfacefeedULL, /* len */
47 PROT_READ|PROT_EXEC, /* prot */
48 MAP_FILE|MAP_FIXED, /* flags */
50 (unsigned long) 0xdecaffedbadc0dedULL /* offset */
52 const unsigned long page_size = get_page_size();
53 const unsigned long args2_c[6] = {
57 MAP_PRIVATE|MAP_ANONYMOUS,
59 (unsigned long) 0xda7a1057faced000ULL & -page_size
61 void *args = tail_memdup(args1_c, sizeof(args1_c));
63 rc = syscall(__NR_mmap, args);
65 printf("mmap(%#lx, %lu, %#x, %#x, %d, %#lx) = %s\n",
66 args1_c[0], args1_c[1], PROT_READ|PROT_EXEC, MAP_FILE | MAP_FIXED,
67 (int) args1_c[4], args1_c[5], sprintrc(rc));
69 printf("mmap(%#lx, %lu, %#x /* PROT_READ|PROT_EXEC */"
70 ", %#x /* MAP_FILE|MAP_FIXED */, %d, %#lx) = %s\n",
71 args1_c[0], args1_c[1], PROT_READ|PROT_EXEC, MAP_FILE | MAP_FIXED,
72 (int) args1_c[4], args1_c[5], sprintrc(rc));
74 printf("mmap(%#lx, %lu, PROT_READ|PROT_EXEC, MAP_FILE|MAP_FIXED"
76 args1_c[0], args1_c[1], (int) args1_c[4], args1_c[5],
80 memcpy(args, args2_c, sizeof(args2_c));
81 rc = syscall(__NR_mmap, args);
86 if (asprintf(&str, "%#lx", rc) < 0)
87 perror_msg_and_fail("asprintf");
90 errstr = sprintrc(rc);
93 printf("mmap(NULL, %lu, %#x, %#x, %d, %#lx) = %s\n",
94 args2_c[1], PROT_READ|PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
95 (int) args2_c[4], args2_c[5], errstr);
97 printf("mmap(NULL, %lu, %#x /* PROT_READ|PROT_WRITE */"
98 ", %#x /* MAP_PRIVATE|MAP_ANONYMOUS */, %d, %#lx) = %s\n",
99 args2_c[1], PROT_READ|PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
100 (int) args2_c[4], args2_c[5], errstr);
102 printf("mmap(NULL, %lu, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS"
103 ", %d, %#lx) = %s\n",
104 args2_c[1], (int) args2_c[4], args2_c[5], errstr);
108 void *addr = (void *) rc;
109 if (implemented && mprotect(addr, page_size, PROT_NONE))
110 perror_msg_and_fail("mprotect(%p, %lu, PROT_NONE)",
113 puts("+++ exited with 0 +++");
119 SKIP_MAIN_UNDEFINED("defined __NR_mmap "
120 "&& (defined __arm__ || defined __i386__ || defined __m68k__ "
121 "|| defined __s390__ || defined __s390x__) "
122 "&& (defined PATH_TRACING || !(defined __s390x__ || defined __m68k__))")