4 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
7 #define LOW_ADDR ((void *) (1UL << 30))
8 #define HIGH_ADDR ((void *) (1UL << 50))
15 unsigned int low_addr_required:1;
16 unsigned int keep_mapped:1;
19 static struct testcase testcases[] = {
22 .size = 2 * PAGE_SIZE,
23 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
25 .low_addr_required = 1,
29 .size = 2 * PAGE_SIZE,
30 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
31 .msg = "mmap(LOW_ADDR)",
32 .low_addr_required = 1,
36 .size = 2 * PAGE_SIZE,
37 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
38 .msg = "mmap(HIGH_ADDR)",
43 .size = 2 * PAGE_SIZE,
44 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
45 .msg = "mmap(HIGH_ADDR) again",
50 .size = 2 * PAGE_SIZE,
51 .flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
52 .msg = "mmap(HIGH_ADDR, MAP_FIXED)",
56 .size = 2 * PAGE_SIZE,
57 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
63 .size = 2 * PAGE_SIZE,
64 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
65 .msg = "mmap(-1) again",
68 .addr = (void *)((1UL << 47) - PAGE_SIZE),
69 .size = 2 * PAGE_SIZE,
70 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
71 .msg = "mmap((1UL << 47), 2 * PAGE_SIZE)",
72 .low_addr_required = 1,
76 .addr = (void *)((1UL << 47) - PAGE_SIZE / 2),
77 .size = 2 * PAGE_SIZE,
78 .flags = MAP_PRIVATE | MAP_ANONYMOUS,
79 .msg = "mmap((1UL << 47), 2 * PAGE_SIZE / 2)",
80 .low_addr_required = 1,
84 .addr = (void *)((1UL << 47) - PAGE_SIZE),
85 .size = 2 * PAGE_SIZE,
86 .flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
87 .msg = "mmap((1UL << 47) - PAGE_SIZE, 2 * PAGE_SIZE, MAP_FIXED)",
92 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
93 .msg = "mmap(NULL, MAP_HUGETLB)",
94 .low_addr_required = 1,
99 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
100 .msg = "mmap(LOW_ADDR, MAP_HUGETLB)",
101 .low_addr_required = 1,
106 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
107 .msg = "mmap(HIGH_ADDR, MAP_HUGETLB)",
113 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
114 .msg = "mmap(HIGH_ADDR, MAP_HUGETLB) again",
120 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
121 .msg = "mmap(HIGH_ADDR, MAP_FIXED | MAP_HUGETLB)",
126 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
127 .msg = "mmap(-1, MAP_HUGETLB)",
133 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
134 .msg = "mmap(-1, MAP_HUGETLB) again",
137 .addr = (void *)((1UL << 47) - PAGE_SIZE),
139 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
140 .msg = "mmap((1UL << 47), 4UL << 20, MAP_HUGETLB)",
141 .low_addr_required = 1,
145 .addr = (void *)((1UL << 47) - (2UL << 20)),
147 .flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
148 .msg = "mmap((1UL << 47) - (2UL << 20), 4UL << 20, MAP_FIXED | MAP_HUGETLB)",
152 int main(int argc, char **argv)
157 for (i = 0; i < ARRAY_SIZE(testcases); i++) {
158 struct testcase *t = testcases + i;
160 p = mmap(t->addr, t->size, PROT_NONE, t->flags, -1, 0);
162 printf("%s: %p - ", t->msg, p);
164 if (p == MAP_FAILED) {
169 if (t->low_addr_required && p >= (void *)(1UL << 47))