Support for MIPS in architecture independent files....

src/mips/frames-mips.cc

+// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+#include "v8.h"
+
+#include "frames-inl.h"
+#include "mips/assembler-mips-inl.h"
+
+// FROM arm code
+// Seems to be the same for all arch except for the StackFrame::Type ExitFrame::GetStateForFramePointer function
+
+namespace v8 {
+namespace internal {
+
+
+StackFrame::Type StackFrame::ComputeType(State* state) {
+  ASSERT(state->fp != NULL);
+  if (StandardFrame::IsArgumentsAdaptorFrame(state->fp)) {
+    return ARGUMENTS_ADAPTOR;
+  }
+  // The marker and function offsets overlap. If the marker isn't a
+  // smi then the frame is a JavaScript frame -- and the marker is
+  // really the function.
+  const int offset = StandardFrameConstants::kMarkerOffset;
+  Object* marker = Memory::Object_at(state->fp + offset);
+  if (!marker->IsSmi()) return JAVA_SCRIPT;
+  return static_cast<StackFrame::Type>(Smi::cast(marker)->value());
+}
+
+
+StackFrame::Type ExitFrame::GetStateForFramePointer(Address fp, State* state) {
+  if (fp == 0) return NONE;
+  // Compute frame type and stack pointer.
+  Address sp = fp + ExitFrameConstants::kSPDisplacement;
+  const int offset = ExitFrameConstants::kCodeOffset;
+  Object* code = Memory::Object_at(fp + offset);
+  bool is_debug_exit = code->IsSmi();
+  if (is_debug_exit) {
+    sp -= kNumJSCallerSaved * kPointerSize;
+  }
+  // Fill in the state.
+  state->sp = sp;
+  state->fp = fp;
+  state->pc_address = reinterpret_cast<Address*>(sp - 1 * kPointerSize);
+  return EXIT;
+}
+
+
+void ExitFrame::Iterate(ObjectVisitor* v) const {
+  // Do nothing
+}
+
+
+int JavaScriptFrame::GetProvidedParametersCount() const {
+  return ComputeParametersCount();
+}
+
+
+Address JavaScriptFrame::GetCallerStackPointer() const {
+  UNIMPLEMENTED_();
+//  int arguments;
+//  if (Heap::gc_state() != Heap::NOT_IN_GC || disable_heap_access_) {
+//    // The arguments for cooked frames are traversed as if they were
+//    // expression stack elements of the calling frame. The reason for
+//    // this rather strange decision is that we cannot access the
+//    // function during mark-compact GCs when the stack is cooked.
+//    // In fact accessing heap objects (like function->shared() below)
+//    // at all during GC is problematic.
+//    arguments = 0;
+//  } else {
+//    // Compute the number of arguments by getting the number of formal
+//    // parameters of the function. We must remember to take the
+//    // receiver into account (+1).
+//    JSFunction* function = JSFunction::cast(this->function());
+//    arguments = function->shared()->formal_parameter_count() + 1;
+//  }
+//  const int offset = StandardFrameConstants::kCallerSPOffset;
+//  return fp() + offset + (arguments * kPointerSize);
+  return static_cast<Address>(NULL); // UNIMPLEMENTED RETURN
+}
+
+
+Address ArgumentsAdaptorFrame::GetCallerStackPointer() const {
+  UNIMPLEMENTED_();
+//  const int arguments = Smi::cast(GetExpression(0))->value();
+//  const int offset = StandardFrameConstants::kCallerSPOffset;
+//  return fp() + offset + (arguments + 1) * kPointerSize;
+  return static_cast<Address>(NULL); // UNIMPLEMENTED RETURN
+}
+
+
+Address InternalFrame::GetCallerStackPointer() const {
+  UNIMPLEMENTED_();
+  // Internal frames have no arguments. The stack pointer of the
+  // caller is at a fixed offset from the frame pointer.
+//  return fp() + StandardFrameConstants::kCallerSPOffset;
+  return static_cast<Address>(NULL); // UNIMPLEMENTED RETURN
+}
+
+
+} }  // namespace v8::internal