cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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binfmt_elf_test.c (2796B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2#include <kunit/test.h>
      3
      4static 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
     54static struct kunit_case binfmt_elf_test_cases[] = {
     55	KUNIT_CASE(total_mapping_size_test),
     56	{},
     57};
     58
     59static struct kunit_suite binfmt_elf_test_suite = {
     60	.name = KBUILD_MODNAME,
     61	.test_cases = binfmt_elf_test_cases,
     62};
     63
     64kunit_test_suite(binfmt_elf_test_suite);