PPC: Fix InterpreterEntryTrampoline().

src/ppc/builtins-ppc.cc

 // Copyright 2014 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.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 881 matching lines @@
     // Check function data field is actually a BytecodeArray object.
     __ TestIfSmi(kInterpreterBytecodeArrayRegister, r0);
     __ Assert(ne, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry);
     __ CompareObjectType(kInterpreterBytecodeArrayRegister, r3, no_reg,
                          BYTECODE_ARRAY_TYPE);
     __ Assert(eq, kFunctionDataShouldBeBytecodeArrayOnInterpreterEntry);
   }
 
   // Allocate the local and temporary register file on the stack.
   {
-    // Load frame size from the BytecodeArray object.
-    __ LoadP(r5, FieldMemOperand(kInterpreterBytecodeArrayRegister,
-                                 BytecodeArray::kFrameSizeOffset));
+    // Load frame size (word) from the BytecodeArray object.
+    __ lwz(r5, FieldMemOperand(kInterpreterBytecodeArrayRegister,
+                               BytecodeArray::kFrameSizeOffset));
 
     // Do a stack check to ensure we don't go over the limit.
     Label ok;
     __ sub(r6, sp, r5);
     __ LoadRoot(r0, Heap::kRealStackLimitRootIndex);
     __ cmp(r6, r0);
     __ bge(&ok);
     __ InvokeBuiltin(Builtins::STACK_OVERFLOW, CALL_FUNCTION);
     __ bind(&ok);
 
     // If ok, push undefined as the initial value for all register file entries.
     // Note: there should always be at least one stack slot for the return
     // register in the register file.
     // TODO(rmcilroy): Consider doing more than one push per loop iteration.
     Label loop_header;
     __ LoadRoot(r6, Heap::kUndefinedValueRootIndex);
     __ ShiftRightImm(r5, r5, Operand(kPointerSizeLog2));
+    __ mtctr(r5);
     __ bind(&loop_header);
     __ push(r6);
     __ bdnz(&loop_header);
   }
 
   // TODO(rmcilroy): List of things not currently dealt with here but done in
   // fullcodegen's prologue:
   //  - Support profiler (specifically profiling_counter).
   //  - Call ProfileEntryHookStub when isolate has a function_entry_hook.
   //  - Allow simulator stop operations if FLAG_stop_at is set.
@@ skipping 988 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC