upload android base code part6

android/system/core/libunwindstack/ArmExidx.h

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2016 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_ARM_EXIDX_H
+#define _LIBUNWINDSTACK_ARM_EXIDX_H
+
+#include <stdint.h>
+
+#include <deque>
+
+namespace unwindstack {
+
+// Forward declarations.
+class Memory;
+class RegsArm;
+
+enum ArmStatus : size_t {
+  ARM_STATUS_NONE = 0,
+  ARM_STATUS_NO_UNWIND,
+  ARM_STATUS_FINISH,
+  ARM_STATUS_RESERVED,
+  ARM_STATUS_SPARE,
+  ARM_STATUS_TRUNCATED,
+  ARM_STATUS_READ_FAILED,
+  ARM_STATUS_MALFORMED,
+  ARM_STATUS_INVALID_ALIGNMENT,
+  ARM_STATUS_INVALID_PERSONALITY,
+};
+
+enum ArmOp : uint8_t {
+  ARM_OP_FINISH = 0xb0,
+};
+
+class ArmExidx {
+ public:
+  ArmExidx(RegsArm* regs, Memory* elf_memory, Memory* process_memory)
+      : regs_(regs), elf_memory_(elf_memory), process_memory_(process_memory) {}
+  virtual ~ArmExidx() {}
+
+  void LogRawData();
+
+  bool ExtractEntryData(uint32_t entry_offset);
+
+  bool Eval();
+
+  bool Decode();
+
+  std::deque<uint8_t>* data() { return &data_; }
+
+  ArmStatus status() { return status_; }
+
+  RegsArm* regs() { return regs_; }
+
+  uint32_t cfa() { return cfa_; }
+  void set_cfa(uint32_t cfa) { cfa_ = cfa; }
+
+  bool pc_set() { return pc_set_; }
+  void set_pc_set(bool pc_set) { pc_set_ = pc_set; }
+
+  void set_log(bool log) { log_ = log; }
+  void set_log_skip_execution(bool skip_execution) { log_skip_execution_ = skip_execution; }
+  void set_log_indent(uint8_t indent) { log_indent_ = indent; }
+
+ private:
+  bool GetByte(uint8_t* byte);
+
+  bool DecodePrefix_10_00(uint8_t byte);
+  bool DecodePrefix_10_01(uint8_t byte);
+  bool DecodePrefix_10_10(uint8_t byte);
+  bool DecodePrefix_10_11_0000();
+  bool DecodePrefix_10_11_0001();
+  bool DecodePrefix_10_11_0010();
+  bool DecodePrefix_10_11_0011();
+  bool DecodePrefix_10_11_01nn();
+  bool DecodePrefix_10_11_1nnn(uint8_t byte);
+  bool DecodePrefix_10(uint8_t byte);
+
+  bool DecodePrefix_11_000(uint8_t byte);
+  bool DecodePrefix_11_001(uint8_t byte);
+  bool DecodePrefix_11_010(uint8_t byte);
+  bool DecodePrefix_11(uint8_t byte);
+
+  RegsArm* regs_ = nullptr;
+  uint32_t cfa_ = 0;
+  std::deque<uint8_t> data_;
+  ArmStatus status_ = ARM_STATUS_NONE;
+
+  Memory* elf_memory_;
+  Memory* process_memory_;
+
+  bool log_ = false;
+  uint8_t log_indent_ = 0;
+  bool log_skip_execution_ = false;
+  bool pc_set_ = false;
+};
+
+}  // namespace unwindstack
+
+#endif  // _LIBUNWINDSTACK_ARM_EXIDX_H