Move backend specific files to separate directories.

src/debug-arm.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 "codegen-inl.h"
-#include "debug.h"
-
-namespace v8 { namespace internal {
-
-#ifdef ENABLE_DEBUGGER_SUPPORT
-// Currently debug break is not supported in frame exit code on ARM.
-bool BreakLocationIterator::IsDebugBreakAtReturn() {
-  return false;
-}
-
-
-// Currently debug break is not supported in frame exit code on ARM.
-void BreakLocationIterator::SetDebugBreakAtReturn() {
-  UNIMPLEMENTED();
-}
-
-
-// Currently debug break is not supported in frame exit code on ARM.
-void BreakLocationIterator::ClearDebugBreakAtReturn() {
-  UNIMPLEMENTED();
-}
-
-
-bool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) {
-  ASSERT(RelocInfo::IsJSReturn(rinfo->rmode()));
-  // Currently debug break is not supported in frame exit code on ARM.
-  return false;
-}
-
-
-#define __ ACCESS_MASM(masm)
-
-
-static void Generate_DebugBreakCallHelper(MacroAssembler* masm,
-                                          RegList pointer_regs) {
-  // Save the content of all general purpose registers in memory. This copy in
-  // memory is later pushed onto the JS expression stack for the fake JS frame
-  // generated and also to the C frame generated on top of that. In the JS
-  // frame ONLY the registers containing pointers will be pushed on the
-  // expression stack. This causes the GC to update these  pointers so that
-  // they will have the correct value when returning from the debugger.
-  __ SaveRegistersToMemory(kJSCallerSaved);
-
-  __ EnterInternalFrame();
-
-  // Store the registers containing object pointers on the expression stack to
-  // make sure that these are correctly updated during GC.
-  // Use sp as base to push.
-  __ CopyRegistersFromMemoryToStack(sp, pointer_regs);
-
-#ifdef DEBUG
-  __ RecordComment("// Calling from debug break to runtime - come in - over");
-#endif
-  __ mov(r0, Operand(0));  // no arguments
-  __ mov(r1, Operand(ExternalReference::debug_break()));
-
-  CEntryDebugBreakStub ceb;
-  __ CallStub(&ceb);
-
-  // Restore the register values containing object pointers from the expression
-  // stack in the reverse order as they where pushed.
-  // Use sp as base to pop.
-  __ CopyRegistersFromStackToMemory(sp, r3, pointer_regs);
-
-  __ LeaveInternalFrame();
-
-  // Inlined ExitJSFrame ends here.
-
-  // Finally restore all registers.
-  __ RestoreRegistersFromMemory(kJSCallerSaved);
-
-  // Now that the break point has been handled, resume normal execution by
-  // jumping to the target address intended by the caller and that was
-  // overwritten by the address of DebugBreakXXX.
-  __ mov(ip, Operand(ExternalReference(Debug_Address::AfterBreakTarget())));
-  __ ldr(ip, MemOperand(ip));
-  __ Jump(ip);
-}
-
-
-void Debug::GenerateLoadICDebugBreak(MacroAssembler* masm) {
-  // Calling convention for IC load (from ic-arm.cc).
-  // ----------- S t a t e -------------
-  //  -- r0    : receiver
-  //  -- r2    : name
-  //  -- lr    : return address
-  //  -- [sp]  : receiver
-  // -----------------------------------
-  // Registers r0 and r2 contain objects that needs to be pushed on the
-  // expression stack of the fake JS frame.
-  Generate_DebugBreakCallHelper(masm, r0.bit() | r2.bit());
-}
-
-
-void Debug::GenerateStoreICDebugBreak(MacroAssembler* masm) {
-  // Calling convention for IC store (from ic-arm.cc).
-  // ----------- S t a t e -------------
-  //  -- r0    : receiver
-  //  -- r2    : name
-  //  -- lr    : return address
-  //  -- [sp]  : receiver
-  // -----------------------------------
-  // Registers r0 and r2 contain objects that needs to be pushed on the
-  // expression stack of the fake JS frame.
-  Generate_DebugBreakCallHelper(masm, r0.bit() | r2.bit());
-}
-
-
-void Debug::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) {
-  // Keyed load IC not implemented on ARM.
-}
-
-
-void Debug::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) {
-  // Keyed store IC not implemented on ARM.
-}
-
-
-void Debug::GenerateCallICDebugBreak(MacroAssembler* masm) {
-  // Calling convention for IC call (from ic-arm.cc)
-  // ----------- S t a t e -------------
-  //  -- r0: number of arguments
-  //  -- r1: receiver
-  //  -- lr: return address
-  // -----------------------------------
-  // Register r1 contains an object that needs to be pushed on the expression
-  // stack of the fake JS frame. r0 is the actual number of arguments not
-  // encoded as a smi, therefore it cannot be on the expression stack of the
-  // fake JS frame as it can easily be an invalid pointer (e.g. 1). r0 will be
-  // pushed on the stack of the C frame and restored from there.
-  Generate_DebugBreakCallHelper(masm, r1.bit());
-}
-
-
-void Debug::GenerateConstructCallDebugBreak(MacroAssembler* masm) {
-  // In places other than IC call sites it is expected that r0 is TOS which
-  // is an object - this is not generally the case so this should be used with
-  // care.
-  Generate_DebugBreakCallHelper(masm, r0.bit());
-}
-
-
-void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) {
-  // In places other than IC call sites it is expected that r0 is TOS which
-  // is an object - this is not generally the case so this should be used with
-  // care.
-  Generate_DebugBreakCallHelper(masm, r0.bit());
-}
-
-
-void Debug::GenerateReturnDebugBreakEntry(MacroAssembler* masm) {
-  // Generate nothing as this handling of debug break return is not done this
-  // way on ARM  - yet.
-}
-
-
-void Debug::GenerateStubNoRegistersDebugBreak(MacroAssembler* masm) {
-  // Generate nothing as CodeStub CallFunction is not used on ARM.
-}
-
-
-#undef __
-
-#endif  // ENABLE_DEBUGGER_SUPPORT
-
-} }  // namespace v8::internal