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_cp1.py

@@ -1,13 +1,29 @@
+
+import regress
+
 from unicorn import *
 from unicorn.mips_const import *
 
 
+CODE = b'\x44\x43\xF8\x00'      #  cfc1    $v1, FCSR
+BASE = 0x416CB0
 
-# .text:00416CB0                 cfc1    $v1, FCSR
-shellcode = [0x44, 0x43, 0xF8, 0x00]
-base = 0x416CB0
 
-uc = Uc(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_BIG_ENDIAN)
-uc.mem_map(0x416000, 0x1000)
-uc.mem_write(base, bytes(shellcode))
-uc.emu_start(base, base + len(shellcode))
+class TestMipsCp1(regress.RegressTest):
+    def runTest(self):
+        uc = Uc(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_BIG_ENDIAN)
+
+        uc.mem_map(BASE & ~(0x1000 - 1), 0x1000)
+        uc.mem_write(BASE, CODE)
+
+        # set a wrong value in v1
+        uc.reg_write(UC_MIPS_REG_V1, 0x0badc0de)
+
+        uc.emu_start(BASE, BASE + len(CODE))
+
+        # default FCSR value should be 0
+        self.assertEqual(0x0000, uc.reg_read(UC_MIPS_REG_V1))
+
+
+if __name__ == '__main__':
+    regress.main()