1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | #include <kunit/test.h> |
3 | |
4 | static void total_mapping_size_test(struct kunit *test) |
5 | { |
6 | struct elf_phdr empty[] = { |
7 | { .p_type = PT_LOAD, .p_vaddr = 0, .p_memsz = 0, }, |
8 | { .p_type = PT_INTERP, .p_vaddr = 10, .p_memsz = 999999, }, |
9 | }; |
10 | /* |
11 | * readelf -lW /bin/mount | grep '^ .*0x0' | awk '{print "\t\t{ .p_type = PT_" \ |
12 | * $1 ", .p_vaddr = " $3 ", .p_memsz = " $6 ", },"}' |
13 | */ |
14 | struct elf_phdr mount[] = { |
15 | { .p_type = PT_PHDR, .p_vaddr = 0x00000040, .p_memsz = 0x0002d8, }, |
16 | { .p_type = PT_INTERP, .p_vaddr = 0x00000318, .p_memsz = 0x00001c, }, |
17 | { .p_type = PT_LOAD, .p_vaddr = 0x00000000, .p_memsz = 0x0033a8, }, |
18 | { .p_type = PT_LOAD, .p_vaddr = 0x00004000, .p_memsz = 0x005c91, }, |
19 | { .p_type = PT_LOAD, .p_vaddr = 0x0000a000, .p_memsz = 0x0022f8, }, |
20 | { .p_type = PT_LOAD, .p_vaddr = 0x0000d330, .p_memsz = 0x000d40, }, |
21 | { .p_type = PT_DYNAMIC, .p_vaddr = 0x0000d928, .p_memsz = 0x000200, }, |
22 | { .p_type = PT_NOTE, .p_vaddr = 0x00000338, .p_memsz = 0x000030, }, |
23 | { .p_type = PT_NOTE, .p_vaddr = 0x00000368, .p_memsz = 0x000044, }, |
24 | { .p_type = PT_GNU_PROPERTY, .p_vaddr = 0x00000338, .p_memsz = 0x000030, }, |
25 | { .p_type = PT_GNU_EH_FRAME, .p_vaddr = 0x0000b490, .p_memsz = 0x0001ec, }, |
26 | { .p_type = PT_GNU_STACK, .p_vaddr = 0x00000000, .p_memsz = 0x000000, }, |
27 | { .p_type = PT_GNU_RELRO, .p_vaddr = 0x0000d330, .p_memsz = 0x000cd0, }, |
28 | }; |
29 | size_t mount_size = 0xE070; |
30 | /* https://lore.kernel.org/linux-fsdevel/YfF18Dy85mCntXrx@fractal.localdomain */ |
31 | struct elf_phdr unordered[] = { |
32 | { .p_type = PT_LOAD, .p_vaddr = 0x00000000, .p_memsz = 0x0033a8, }, |
33 | { .p_type = PT_LOAD, .p_vaddr = 0x0000d330, .p_memsz = 0x000d40, }, |
34 | { .p_type = PT_LOAD, .p_vaddr = 0x00004000, .p_memsz = 0x005c91, }, |
35 | { .p_type = PT_LOAD, .p_vaddr = 0x0000a000, .p_memsz = 0x0022f8, }, |
36 | }; |
37 | |
38 | /* No headers, no size. */ |
39 | KUNIT_EXPECT_EQ(test, total_mapping_size(NULL, 0), 0); |
40 | KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 0), 0); |
41 | /* Empty headers, no size. */ |
42 | KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 1), 0); |
43 | /* No PT_LOAD headers, no size. */ |
44 | KUNIT_EXPECT_EQ(test, total_mapping_size(&empty[1], 1), 0); |
45 | /* Empty PT_LOAD and non-PT_LOAD headers, no size. */ |
46 | KUNIT_EXPECT_EQ(test, total_mapping_size(empty, 2), 0); |
47 | |
48 | /* Normal set of PT_LOADS, and expected size. */ |
49 | KUNIT_EXPECT_EQ(test, total_mapping_size(mount, ARRAY_SIZE(mount)), mount_size); |
50 | /* Unordered PT_LOADs result in same size. */ |
51 | KUNIT_EXPECT_EQ(test, total_mapping_size(unordered, ARRAY_SIZE(unordered)), mount_size); |
52 | } |
53 | |
54 | static struct kunit_case binfmt_elf_test_cases[] = { |
55 | KUNIT_CASE(total_mapping_size_test), |
56 | {}, |
57 | }; |
58 | |
59 | static struct kunit_suite binfmt_elf_test_suite = { |
60 | .name = KBUILD_MODNAME, |
61 | .test_cases = binfmt_elf_test_cases, |
62 | }; |
63 | |
64 | kunit_test_suite(binfmt_elf_test_suite); |
65 | |