[debugger] introduce abstract interface for break location.

src/ppc/assembler-ppc-inl.h

Index: src/ppc/assembler-ppc-inl.h
diff --git a/src/ppc/assembler-ppc-inl.h b/src/ppc/assembler-ppc-inl.h
index e5b577be80546c47d47f1677205190ca87cd81e5..42e220809f5771b0f8a8ca9c68de83e46db386c0 100644
--- a/src/ppc/assembler-ppc-inl.h
+++ b/src/ppc/assembler-ppc-inl.h
@@ -328,39 +328,6 @@ void RelocInfo::WipeOut() {
 }
 
 
-bool RelocInfo::IsPatchedReturnSequence() {
-  //
-  // The patched return sequence is defined by
-  // BreakLocation::SetDebugBreakAtReturn()
-  // FIXED_SEQUENCE
-
-  Instr instr0 = Assembler::instr_at(pc_);
-  Instr instr1 = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
-#if V8_TARGET_ARCH_PPC64
-  Instr instr3 = Assembler::instr_at(pc_ + (3 * Assembler::kInstrSize));
-  Instr instr4 = Assembler::instr_at(pc_ + (4 * Assembler::kInstrSize));
-  Instr binstr = Assembler::instr_at(pc_ + (7 * Assembler::kInstrSize));
-#else
-  Instr binstr = Assembler::instr_at(pc_ + 4 * Assembler::kInstrSize);
-#endif
-  bool patched_return =
-      ((instr0 & kOpcodeMask) == ADDIS && (instr1 & kOpcodeMask) == ORI &&
-#if V8_TARGET_ARCH_PPC64
-       (instr3 & kOpcodeMask) == ORIS && (instr4 & kOpcodeMask) == ORI &&
-#endif
-       (binstr == 0x7d821008));  // twge r2, r2
-
-  // printf("IsPatchedReturnSequence: %d\n", patched_return);
-  return patched_return;
-}
-
-
-bool RelocInfo::IsPatchedDebugBreakSlotSequence() {
-  Instr current_instr = Assembler::instr_at(pc_);
-  return !Assembler::IsNop(current_instr, Assembler::DEBUG_BREAK_NOP);
-}
-
-
 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
   RelocInfo::Mode mode = rmode();
   if (mode == RelocInfo::EMBEDDED_OBJECT) {