1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #if V8_TARGET_ARCH_MIPS
6
7 #include "src/debug/debug.h"
8
9 #include "src/debug/liveedit.h"
10 #include "src/frames-inl.h"
11 #include "src/macro-assembler.h"
12
13 namespace v8 {
14 namespace internal {
15
16 #define __ ACCESS_MASM(masm)
17
GenerateHandleDebuggerStatement(MacroAssembler * masm)18 void DebugCodegen::GenerateHandleDebuggerStatement(MacroAssembler* masm) {
19 {
20 FrameScope scope(masm, StackFrame::INTERNAL);
21 __ CallRuntime(Runtime::kHandleDebuggerStatement, 0);
22 }
23 __ MaybeDropFrames();
24
25 // Return to caller.
26 __ Ret();
27 }
28
GenerateFrameDropperTrampoline(MacroAssembler * masm)29 void DebugCodegen::GenerateFrameDropperTrampoline(MacroAssembler* masm) {
30 // Frame is being dropped:
31 // - Drop to the target frame specified by a1.
32 // - Look up current function on the frame.
33 // - Leave the frame.
34 // - Restart the frame by calling the function.
35 __ mov(fp, a1);
36 __ lw(a1, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
37
38 // Pop return address and frame.
39 __ LeaveFrame(StackFrame::INTERNAL);
40
41 __ lw(a0, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
42 __ lhu(a0,
43 FieldMemOperand(a0, SharedFunctionInfo::kFormalParameterCountOffset));
44 __ mov(a2, a0);
45
46 ParameterCount dummy1(a2);
47 ParameterCount dummy2(a0);
48 __ InvokeFunction(a1, dummy1, dummy2, JUMP_FUNCTION);
49 }
50
51
52 const bool LiveEdit::kFrameDropperSupported = true;
53
54 #undef __
55
56 } // namespace internal
57 } // namespace v8
58
59 #endif // V8_TARGET_ARCH_MIPS
60