Revamp Python regression tests suite (#2022)

* Fix Python regression test suite (partial)

* Fix Python regression test suite

* Add a test for mapping at high addresses

* Add ctl tests

tests/regress/mips_kernel_mmu.py

@@ -1,23 +1,26 @@
 #!/usr/bin/python
 
+import regress
+
 from unicorn import *
 from unicorn.mips_const import *
 
-import regress
+
+CODE = b'\x34\x21\x34\x56'   # ori $at, $at, 0x3456
+BASE = 0x10000000
+
 
 class MipsSyscall(regress.RegressTest):
-    def test(self):
-        addr = 0x80000000
-        code = '34213456'.decode('hex') # ori $at, $at, 0x3456
-
+    def test_syscall(self):
         uc = Uc(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_BIG_ENDIAN)
-        uc.mem_map(addr, 0x1000)
-        uc.mem_write(addr, code)
+
+        uc.mem_map(BASE, 0x1000)
+        uc.mem_write(BASE, CODE)
         uc.reg_write(UC_MIPS_REG_AT, 0)
 
-        uc.emu_start(addr, addr + len(code))
+        uc.emu_start(BASE, BASE + len(CODE))
 
-        self.assertEqual(uc.reg_read(UC_MIPS_REG_AT), 0x3456)
+        self.assertEqual(0x3456, uc.reg_read(UC_MIPS_REG_AT))
 
 
 if __name__ == '__main__':