1 // SPDX-License-Identifier: GPL-2.0-or-later 2 3 static 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 48 static void run_mmap_tests(int *num_tests, int *num_fail) 49 { 50 TEST(mmap_region_basic); 51 } 52