src/debug/s390/debug-s390.cc

// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/init/v8.h"

#if V8_TARGET_ARCH_S390

#include "src/debug/debug.h"

#include "src/codegen/macro-assembler.h"
#include "src/debug/liveedit.h"
#include "src/execution/frames-inl.h"

namespace v8 {
namespace internal {

#define __ ACCESS_MASM(masm)

void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm) {
  {
    FrameScope scope(masm, StackFrame::INTERNAL);
    __ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
  }
  __ MaybeDropFrames();

  // Return to caller.
  __ Ret();
}

void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
  // Frame is being dropped:
  // - Drop to the target frame specified by r3.
  // - Look up current function on the frame.
  // - Leave the frame.
  // - Restart the frame by calling the function.

  __ LoadRR(fp, r3);
  __ LoadP(r3, MemOperand(fp, StandardFrameConstants::kFunctionOffset));
  __ LeaveFrame(StackFrame::INTERNAL);
  __ LoadTaggedPointerField(
      r2, FieldMemOperand(r3, JSFunction::kSharedFunctionInfoOffset));
  __ LoadLogicalHalfWordP(
      r2, FieldMemOperand(r2, SharedFunctionInfo::kFormalParameterCountOffset));
  __ LoadRR(r4, r2);

  __ InvokeFunction(r3, r4, r2, JUMP_FUNCTION);
}

const bool LiveEdit::kFrameDropperSupported = true;

#undef __
}  // namespace internal
}  // namespace v8

#endif  // V8_TARGET_ARCH_S390