2 * Check decoding of "old mmap" edition of mmap syscall.
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2016-2018 The strace developers.
8 * SPDX-License-Identifier: GPL-2.0-or-later
12 #include <asm/unistd.h>
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__))
27 # include <sys/mman.h>
37 long rc = syscall(__NR_mmap, 0);
39 printf("mmap(NULL) = %ld %s (%m)\n", rc, errno2name());
42 const unsigned long args1_c[6] = {
43 (unsigned long) 0xbadc0deddeadbeefULL, /* addr */
44 (unsigned long) 0xdeefacedfacefeedULL, /* len */
45 PROT_READ|PROT_EXEC, /* prot */
46 MAP_FILE|MAP_FIXED, /* flags */
48 (unsigned long) 0xdecaffedbadc0dedULL /* offset */
50 const unsigned long page_size = get_page_size();
51 const unsigned long args2_c[6] = {
55 MAP_PRIVATE|MAP_ANONYMOUS,
57 (unsigned long) 0xda7a1057faced000ULL & -page_size
59 void *args = tail_memdup(args1_c, sizeof(args1_c));
61 rc = syscall(__NR_mmap, args);
63 printf("mmap(%#lx, %lu, %#x, %#x, %d, %#lx) = %ld %s (%m)\n",
64 args1_c[0], args1_c[1], PROT_READ|PROT_EXEC, MAP_FILE | MAP_FIXED,
65 (int) args1_c[4], args1_c[5], rc, errno2name());
67 printf("mmap(%#lx, %lu, %#x /* PROT_READ|PROT_EXEC */"
68 ", %#x /* MAP_FILE|MAP_FIXED */, %d, %#lx) = %ld %s (%m)\n",
69 args1_c[0], args1_c[1], PROT_READ|PROT_EXEC, MAP_FILE | MAP_FIXED,
70 (int) args1_c[4], args1_c[5], rc, errno2name());
72 printf("mmap(%#lx, %lu, PROT_READ|PROT_EXEC, MAP_FILE|MAP_FIXED"
73 ", %d, %#lx) = %ld %s (%m)\n",
74 args1_c[0], args1_c[1], (int) args1_c[4], args1_c[5],
78 memcpy(args, args2_c, sizeof(args2_c));
79 rc = syscall(__NR_mmap, args);
82 printf("mmap(NULL, %lu, %#x, %#x, %d, %#lx) = %#lx\n",
83 args2_c[1], PROT_READ|PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
84 (int) args2_c[4], args2_c[5], rc);
86 printf("mmap(NULL, %lu, %#x /* PROT_READ|PROT_WRITE */"
87 ", %#x /* MAP_PRIVATE|MAP_ANONYMOUS */, %d, %#lx) = %#lx\n",
88 args2_c[1], PROT_READ|PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
89 (int) args2_c[4], args2_c[5], rc);
91 printf("mmap(NULL, %lu, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS"
92 ", %d, %#lx) = %#lx\n",
93 args2_c[1], (int) args2_c[4], args2_c[5], rc);
97 void *addr = (void *) rc;
98 if (mprotect(addr, page_size, PROT_NONE))
99 perror_msg_and_fail("mprotect(%p, %lu, PROT_NONE)",
102 puts("+++ exited with 0 +++");
108 SKIP_MAIN_UNDEFINED("defined __NR_mmap "
109 "&& (defined __arm__ || defined __i386__ || defined __m68k__ "
110 "|| defined __s390__ || defined __s390x__) "
111 "&& (defined PATH_TRACING || !(defined __s390x__ || defined __m68k__))")