1 // SPDX-License-Identifier: GPL-2.0-or-later
2
test_mmap_region_basic(void)3 static bool test_mmap_region_basic(void)
4 {
5 struct mm_struct mm = {};
6 unsigned long addr;
7 struct vm_area_struct *vma;
8 VMA_ITERATOR(vmi, &mm, 0);
9
10 current->mm = &mm;
11
12 /* Map at 0x300000, length 0x3000. */
13 addr = __mmap_region(NULL, 0x300000, 0x3000,
14 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
15 0x300, NULL);
16 ASSERT_EQ(addr, 0x300000);
17
18 /* Map at 0x250000, length 0x3000. */
19 addr = __mmap_region(NULL, 0x250000, 0x3000,
20 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
21 0x250, NULL);
22 ASSERT_EQ(addr, 0x250000);
23
24 /* Map at 0x303000, merging to 0x300000 of length 0x6000. */
25 addr = __mmap_region(NULL, 0x303000, 0x3000,
26 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
27 0x303, NULL);
28 ASSERT_EQ(addr, 0x303000);
29
30 /* Map at 0x24d000, merging to 0x250000 of length 0x6000. */
31 addr = __mmap_region(NULL, 0x24d000, 0x3000,
32 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE,
33 0x24d, NULL);
34 ASSERT_EQ(addr, 0x24d000);
35
36 ASSERT_EQ(mm.map_count, 2);
37
38 for_each_vma(vmi, vma) {
39 if (vma->vm_start == 0x300000) {
40 ASSERT_EQ(vma->vm_end, 0x306000);
41 ASSERT_EQ(vma->vm_pgoff, 0x300);
42 } else if (vma->vm_start == 0x24d000) {
43 ASSERT_EQ(vma->vm_end, 0x253000);
44 ASSERT_EQ(vma->vm_pgoff, 0x24d);
45 } else {
46 ASSERT_FALSE(true);
47 }
48 }
49
50 cleanup_mm(&mm, &vmi);
51 return true;
52 }
53
run_mmap_tests(int * num_tests,int * num_fail)54 static void run_mmap_tests(int *num_tests, int *num_fail)
55 {
56 TEST(mmap_region_basic);
57 }
58