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51 lines · 1.3 KiB

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