[MIPS] Adding validator for MIPS architecture.

src/trusted/validator_mips/testdata/test_forbidden_instructions.S

Index: src/trusted/validator_mips/testdata/test_forbidden_instructions.S
diff --git a/src/trusted/validator_mips/testdata/test_forbidden_instructions.S b/src/trusted/validator_mips/testdata/test_forbidden_instructions.S
new file mode 100644
index 0000000000000000000000000000000000000000..4ab44219d2951a9894a83c33fc29ab000c7995be
--- /dev/null
+++ b/src/trusted/validator_mips/testdata/test_forbidden_instructions.S
@@ -0,0 +1,27 @@
+# Copyright 2012 The Native Client Authors.  All rights reserved.
+# Use of this source code is governed by a BSD-style license that can
+# be found in the LICENSE file.
+
+#
+# Tests a few instructions that are always illegal in NaCl.
+#
+
+.globl _start
+_start:
+
+  eret               # Error, (forbidden) unsafe instruction.
+
+  li        $v0, 1   # System call code for print_int.
+  la        $a0, 20  # Integer for printing.
+  syscall            # Error, this is forbidden in untrusted code.
+
+  break              # Error, unsafe instruction.
+
+  di                 # Error, unsafe instruction.
+  ei                 # Error, unsafe instruction.
+  wait               # Error, unsafe instruction.
+  teq $t1, $t2       # Error, unsafe instruction.
+  nop
+  deret              # Error, unsafe instruction.
+
+end_of_code: