[PATCH 2/3] emulator: Add multibyte nopl test case

[Arthur Chunqi Li <yzt356@xxxxxxxxx>]

Test multiple byte nopl (from 1-byte nopl to 9-byte nopl) in
64-bit mode.

Signed-off-by: Arthur Chunqi Li <yzt356@xxxxxxxxx>
---
 x86/emulator.c |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/x86/emulator.c b/x86/emulator.c
index 6972334..bd02d5c 100755
--- a/x86/emulator.c
+++ b/x86/emulator.c
@@ -816,6 +816,30 @@ static void test_movabs(uint64_t *mem, uint8_t *alt_insn_page)
     report("64-bit mov imm2", outregs.rcx == 0x9090909090909090);
 }
 
+static void test_nopl(uint64_t *mem, void *alt_insn_page)
+{
+    MK_INSN(nopl1, ".byte 0x90\n\r"); /* 1 byte nop */
+    MK_INSN(nopl2, ".byte 0x66, 0x90\n\r"); /* 2 byte nop */
+    MK_INSN(nopl3, ".byte 0x0f, 0x1f, 0x00\n\r"); /* 3 byte nop */
+    MK_INSN(nopl4, ".byte 0x0f, 0x1f, 0x40, 0x00\n\r"); /* 4 byte nop */
+    MK_INSN(nopl5, ".byte 0x0f, 0x1f, 0x44, 0x00, 0x00\n\r"); /* 5 byte nop */
+    MK_INSN(nopl6, ".byte 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00\n\r"); /* 6 byte nop */
+    MK_INSN(nopl7, ".byte 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00\n\r"); /* 7 byte nop */
+    MK_INSN(nopl8, ".byte 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00\n\r"); /* 8 byte nop */
+    MK_INSN(nopl9, ".byte 0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00\n\r"); /* 9 byte nop */
+
+    trap_emulator(mem, alt_insn_page, &insn_nopl1);
+    trap_emulator(mem, alt_insn_page, &insn_nopl2);
+    trap_emulator(mem, alt_insn_page, &insn_nopl3);
+    trap_emulator(mem, alt_insn_page, &insn_nopl4);
+    trap_emulator(mem, alt_insn_page, &insn_nopl5);
+    trap_emulator(mem, alt_insn_page, &insn_nopl6);
+    trap_emulator(mem, alt_insn_page, &insn_nopl7);
+    trap_emulator(mem, alt_insn_page, &insn_nopl8);
+    trap_emulator(mem, alt_insn_page, &insn_nopl9);
+    report("nopl", 1);
+}
+
 static void test_crosspage_mmio(volatile uint8_t *mem)
 {
     volatile uint16_t w, *pw;
@@ -1012,6 +1036,7 @@ int main()
 
 	test_mmx_movq_mf(mem, alt_insn_page);
 	test_movabs(mem, alt_insn_page);
+	test_nopl(mem, alt_insn_page);
 
 	test_crosspage_mmio(mem);
 
-- 
1.7.9.5

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