1 #include <linux/kernel.h>
6 struct selftest_opcode {
7 unsigned int expected_size;
12 static const struct selftest_opcode selftest_opcodes[] = {
14 {1, "\xf3\xa4", "rep movsb <mem8>, <mem8>"},
15 {4, "\xf3\xa5", "rep movsl <mem32>, <mem32>"},
18 {1, "\x66\x0f\xb6\x51\xf8", "movzwq <mem8>, <reg16>"},
19 {1, "\x0f\xb6\x51\xf8", "movzwq <mem8>, <reg32>"},
22 {1, "\x66\x0f\xbe\x51\xf8", "movswq <mem8>, <reg16>"},
23 {1, "\x0f\xbe\x51\xf8", "movswq <mem8>, <reg32>"},
27 {1, "\x49\x0f\xb6\x51\xf8", "movzbq <mem8>, <reg64>"},
28 {2, "\x49\x0f\xb7\x51\xf8", "movzbq <mem16>, <reg64>"},
31 {1, "\x49\x0f\xbe\x51\xf8", "movsbq <mem8>, <reg64>"},
32 {2, "\x49\x0f\xbf\x51\xf8", "movsbq <mem16>, <reg64>"},
33 {4, "\x49\x63\x51\xf8", "movslq <mem32>, <reg64>"},
37 static bool selftest_opcode_one(const struct selftest_opcode *op)
41 kmemcheck_opcode_decode(op->insn, &size);
43 if (size == op->expected_size)
46 printk(KERN_WARNING "kmemcheck: opcode %s: expected size %d, got %d\n",
47 op->desc, op->expected_size, size);
51 static bool selftest_opcodes_all(void)
56 for (i = 0; i < ARRAY_SIZE(selftest_opcodes); ++i)
57 pass = pass && selftest_opcode_one(&selftest_opcodes[i]);
62 bool kmemcheck_selftest(void)
66 pass = pass && selftest_opcodes_all();