1 files changed, 97 insertions, 0 deletions
diff --git a/libunwindstack/ElfInterfaceArm.h b/libunwindstack/ElfInterfaceArm.h
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+++ b/libunwindstack/ElfInterfaceArm.h
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+/*
+ * 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_ELF_INTERFACE_ARM_H
+#define _LIBUNWINDSTACK_ELF_INTERFACE_ARM_H
+
+#include <elf.h>
+#include <stdint.h>
+
+#include <iterator>
+#include <unordered_map>
+
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
+
+class ElfInterfaceArm : public ElfInterface32 {
+ public:
+  ElfInterfaceArm(Memory* memory) : ElfInterface32(memory) {}
+  virtual ~ElfInterfaceArm() = default;
+
+  class iterator : public std::iterator<std::bidirectional_iterator_tag, uint32_t> {
+   public:
+    iterator(ElfInterfaceArm* interface, size_t index) : interface_(interface), index_(index) { }
+
+    iterator& operator++() { index_++; return *this; }
+    iterator& operator++(int increment) { index_ += increment; return *this; }
+    iterator& operator--() { index_--; return *this; }
+    iterator& operator--(int decrement) { index_ -= decrement; return *this; }
+
+    bool operator==(const iterator& rhs) { return this->index_ == rhs.index_; }
+    bool operator!=(const iterator& rhs) { return this->index_ != rhs.index_; }
+
+    uint32_t operator*() {
+      uint32_t addr = interface_->addrs_[index_];
+      if (addr == 0) {
+        if (!interface_->GetPrel31Addr(interface_->start_offset_ + index_ * 8, &addr)) {
+          return 0;
+        }
+        interface_->addrs_[index_] = addr;
+      }
+      return addr;
+    }
+
+   private:
+    ElfInterfaceArm* interface_ = nullptr;
+    size_t index_ = 0;
+  };
+
+  iterator begin() { return iterator(this, 0); }
+  iterator end() { return iterator(this, total_entries_); }
+
+  bool Init(int64_t* section_bias) override;
+
+  bool GetPrel31Addr(uint32_t offset, uint32_t* addr);
+
+  bool FindEntry(uint32_t pc, uint64_t* entry_offset);
+
+  void HandleUnknownType(uint32_t type, uint64_t ph_offset, uint64_t ph_filesz) override;
+
+  bool Step(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished) override;
+
+  bool StepExidx(uint64_t pc, Regs* regs, Memory* process_memory, bool* finished);
+
+  bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* offset) override;
+
+  uint64_t start_offset() { return start_offset_; }
+
+  size_t total_entries() { return total_entries_; }
+
+  void set_load_bias(uint64_t load_bias) { load_bias_ = load_bias; }
+
+ protected:
+  uint64_t start_offset_ = 0;
+  size_t total_entries_ = 0;
+  uint64_t load_bias_ = 0;
+
+  std::unordered_map<size_t, uint32_t> addrs_;
+};
+
+}  // namespace unwindstack
+
+#endif  // _LIBUNWINDSTACK_ELF_INTERFACE_ARM_H