LEA with a register-direct source operand is illegal. Verify that the
emulator raises #UD.
Suggested-by: Sean Christopherson <seanjc@xxxxxxxxxx>
Signed-off-by: Michal Luczaj <mhal@xxxxxxx>
---
v1 -> v2: Use ASM_TRY_FEP()
x86/emulator.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/x86/emulator.c b/x86/emulator.c
index 0eb7c1a..dc91ce3 100644
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -897,6 +897,20 @@ static void test_mov_dr(uint64_t *mem)
report(rax == DR6_ACTIVE_LOW, "mov_dr6");
}
+static void test_illegal_lea(void)
+{
+ unsigned int vector;
+
+ asm volatile (ASM_TRY_FEP("1f")
+ ".byte 0x8d; .byte 0xc0\n\t"
+ "1:"
+ : : : "memory", "eax");
+
+ vector = exception_vector();
+ report(vector == UD_VECTOR,
+ "Wanted #UD on LEA with /reg, got vector = %u", vector);
+}
+
static void test_push16(uint64_t *mem)
{
uint64_t rsp1, rsp2;
@@ -1188,6 +1202,7 @@ int main(void)
test_smsw_reg(mem);
test_nop(mem);
test_mov_dr(mem);
+ test_illegal_lea();
} else {
report_skip("skipping register-only tests, "
"use kvm.force_emulation_prefix=1 to enable");
--
2.37.1
