Add libunwindstack support for Mips and Mips64

This patch requires v3.18 kernel or above, because v3.10 kernel
has a bug (as of 8/1/2017) in the ptrace(GETREGSET) function for mips
and mips64.

Change-Id: I004c1fa190193eebe1c84440b366289122a6bd8a
Signed-off-by: Douglas Leung <douglas.leung@mips.com>
Signed-off-by: Dejan Jovicevic <dejan.jovicevic@mips.com>
diff --git a/libunwindstack/MachineMips.h b/libunwindstack/MachineMips.h
new file mode 100644
index 0000000..2dfb1e9
--- /dev/null
+++ b/libunwindstack/MachineMips.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _LIBUNWINDSTACK_MACHINE_MIPS_H
+#define _LIBUNWINDSTACK_MACHINE_MIPS_H
+
+#include <stdint.h>
+
+namespace unwindstack {
+
+enum MipsReg : uint16_t {
+  MIPS_REG_R0 = 0,
+  MIPS_REG_R1,
+  MIPS_REG_R2,
+  MIPS_REG_R3,
+  MIPS_REG_R4,
+  MIPS_REG_R5,
+  MIPS_REG_R6,
+  MIPS_REG_R7,
+  MIPS_REG_R8,
+  MIPS_REG_R9,
+  MIPS_REG_R10,
+  MIPS_REG_R11,
+  MIPS_REG_R12,
+  MIPS_REG_R13,
+  MIPS_REG_R14,
+  MIPS_REG_R15,
+  MIPS_REG_R16,
+  MIPS_REG_R17,
+  MIPS_REG_R18,
+  MIPS_REG_R19,
+  MIPS_REG_R20,
+  MIPS_REG_R21,
+  MIPS_REG_R22,
+  MIPS_REG_R23,
+  MIPS_REG_R24,
+  MIPS_REG_R25,
+  MIPS_REG_R26,
+  MIPS_REG_R27,
+  MIPS_REG_R28,
+  MIPS_REG_R29,
+  MIPS_REG_R30,
+  MIPS_REG_R31,
+  MIPS_REG_PC,
+  MIPS_REG_LAST,
+
+  MIPS_REG_SP = MIPS_REG_R29,
+  MIPS_REG_RA = MIPS_REG_R31,
+};
+
+}  // namespace unwindstack
+
+#endif  // _LIBUNWINDSTACK_MACHINE_MIPS_H
\ No newline at end of file