1 files changed, 130 insertions, 0 deletions
diff --git a/runtime/arch/arm64/context_arm64.cc b/runtime/arch/arm64/context_arm64.cc
new file mode 100644
index 0000000000..3d63c36abe
--- /dev/null
+++ b/runtime/arch/arm64/context_arm64.cc
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
+#include <stdint.h>
+
+#include "context_arm64.h"
+
+#include "mirror/art_method.h"
+#include "mirror/object-inl.h"
+#include "stack.h"
+#include "thread.h"
+
+
+namespace art {
+namespace arm64 {
+
+static const uint64_t gZero = 0;
+
+void Arm64Context::Reset() {
+  for (size_t i = 0; i < kNumberOfCoreRegisters; i++) {
+    gprs_[i] = NULL;
+  }
+  for (size_t i = 0; i < kNumberOfDRegisters; i++) {
+    fprs_[i] = NULL;
+  }
+  gprs_[SP] = &sp_;
+  gprs_[LR] = &pc_;
+  // Initialize registers with easy to spot debug values.
+  sp_ = Arm64Context::kBadGprBase + SP;
+  pc_ = Arm64Context::kBadGprBase + LR;
+}
+
+void Arm64Context::FillCalleeSaves(const StackVisitor& fr) {
+  mirror::ArtMethod* method = fr.GetMethod();
+  uint32_t core_spills = method->GetCoreSpillMask();
+  uint32_t fp_core_spills = method->GetFpSpillMask();
+  size_t spill_count = __builtin_popcount(core_spills);
+  size_t fp_spill_count = __builtin_popcount(fp_core_spills);
+  size_t frame_size = method->GetFrameSizeInBytes();
+
+  if (spill_count > 0) {
+    // Lowest number spill is farthest away, walk registers and fill into context.
+    int j = 1;
+    for (size_t i = 0; i < kNumberOfCoreRegisters; i++) {
+      if (((core_spills >> i) & 1) != 0) {
+        gprs_[i] = fr.CalleeSaveAddress(spill_count  - j, frame_size);
+        j++;
+      }
+    }
+  }
+
+  if (fp_spill_count > 0) {
+    // Lowest number spill is farthest away, walk registers and fill into context.
+    int j = 1;
+    for (size_t i = 0; i < kNumberOfDRegisters; i++) {
+      if (((fp_core_spills >> i) & 1) != 0) {
+        fprs_[i] = fr.CalleeSaveAddress(spill_count + fp_spill_count - j, frame_size);
+        j++;
+      }
+    }
+  }
+}
+
+void Arm64Context::SetGPR(uint32_t reg, uintptr_t value) {
+  DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCoreRegisters));
+  DCHECK_NE(gprs_[reg], &gZero);  // Can't overwrite this static value since they are never reset.
+  DCHECK(gprs_[reg] != NULL);
+  *gprs_[reg] = value;
+}
+
+void Arm64Context::SmashCallerSaves() {
+  // This needs to be 0 because we want a null/zero return value.
+  gprs_[X0] = const_cast<uint64_t*>(&gZero);
+  gprs_[X1] = NULL;
+  gprs_[X2] = NULL;
+  gprs_[X3] = NULL;
+  gprs_[X4] = NULL;
+  gprs_[X5] = NULL;
+  gprs_[X6] = NULL;
+  gprs_[X7] = NULL;
+  gprs_[X8] = NULL;
+  gprs_[X9] = NULL;
+  gprs_[X10] = NULL;
+  gprs_[X11] = NULL;
+  gprs_[X12] = NULL;
+  gprs_[X13] = NULL;
+  gprs_[X14] = NULL;
+  gprs_[X15] = NULL;
+
+  fprs_[D8] = NULL;
+  fprs_[D9] = NULL;
+  fprs_[D10] = NULL;
+  fprs_[D11] = NULL;
+  fprs_[D12] = NULL;
+  fprs_[D13] = NULL;
+  fprs_[D14] = NULL;
+  fprs_[D15] = NULL;
+}
+
+extern "C" void art_quick_do_long_jump(uint64_t*, uint64_t*);
+
+void Arm64Context::DoLongJump() {
+  uint64_t gprs[32];
+  uint64_t fprs[32];
+
+  for (size_t i = 0; i < kNumberOfCoreRegisters; ++i) {
+    gprs[i] = gprs_[i] != NULL ? *gprs_[i] : Arm64Context::kBadGprBase + i;
+  }
+  for (size_t i = 0; i < kNumberOfDRegisters; ++i) {
+    fprs[i] = fprs_[i] != NULL ? *fprs_[i] : Arm64Context::kBadGprBase + i;
+  }
+  DCHECK_EQ(reinterpret_cast<uintptr_t>(Thread::Current()), gprs[TR]);
+  art_quick_do_long_jump(gprs, fprs);
+}
+
+}  // namespace arm64
+}  // namespace art