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9e1a3ce0 KC |
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); |