Add pusha/popa instructions to the realmode test harness

index 0db09b8..20d038e 100644
@@ -4,6 +4,10 @@ typedef unsigned char u8;
 typedef unsigned short u16;
 typedef unsigned u32;
 typedef unsigned long long u64;
+typedef signed char s8;
+typedef signed short s16;
+typedef signed s32;
+typedef signed long long s64;
 
 void test_function(void);
 

@@ -470,6 +474,7 @@ void test_long_jmp()
 void test_push_pop()
 {
 	struct regs inregs = { 0 }, outregs;
+
 	MK_INSN(push32, "mov $0x12345678, %eax\n\t"
 			"push %eax\n\t"
 			"pop %ebx\n\t");

@@ -499,6 +504,10 @@ void test_push_pop()
 			     "mov %fs, %ebx\n\t"
 			     "pop %fs\n\t"
 			);
+	MK_INSN(pusha,  "pushaw\n\t");
+	MK_INSN(pushad, "pushal\n\t");
+	MK_INSN(popa, "popaw\n\t");
+	MK_INSN(popad, "popal\n\t");
 
 	exec_in_big_real_mode(&inregs, &outregs,
 			      insn_push32,

@@ -539,6 +548,34 @@ void test_push_pop()
 
 	if (!regs_equal(&inregs, &outregs, R_AX|R_BX) || outregs.ebx != outregs.eax)
 		print_serial("Push/Pop Test 6: FAIL\n");
+
+	exec_in_big_real_mode(&inregs, &outregs,
+			     insn_pusha,
+			     insn_pusha_end - insn_pusha);
+	if (!regs_equal(&inregs, &outregs, R_SP) 
+				|| (s16)outregs.esp != (s16)(inregs.esp - 16))
+		print_serial("Push/Pop Test 7: FAIL\n");
+
+	exec_in_big_real_mode(&inregs, &outregs,
+			      insn_popa,
+			      insn_popa_end - insn_popa);
+	if (outregs.esp != (inregs.esp + 16))
+		print_serial("Push/Pop Test 8: FAIL\n");
+
+	exec_in_big_real_mode(&inregs, &outregs,
+			      insn_pushad,
+			      insn_pushad_end - insn_pushad);
+
+	if (!regs_equal(&inregs, &outregs, R_SP)
+				|| (s16)outregs.esp != (s16)(inregs.esp - 32))
+		print_serial("Push/Pop Test 9: FAIL\n");
+
+	exec_in_big_real_mode(&inregs, &outregs,
+			      insn_popad,
+			      insn_popad_end - insn_popad);
+
+	if (outregs.esp != (inregs.esp + 32))
+		print_serial("Push/Pop Test 10: FAIL\n");
 }
 
 void test_null(void)