Add X32 port into V8

src/frames.cc

Index: src/frames.cc
===================================================================
--- src/frames.cc	(revision 15486)
+++ src/frames.cc	(working copy)
@@ -539,7 +539,11 @@
   state->sp = sp;
   state->fp = fp;
   state->pc_address = ResolveReturnAddressLocation(
+#ifndef V8_TARGET_ARCH_X32
       reinterpret_cast<Address*>(sp - 1 * kPointerSize));

[danno, 2013/07/17 13:33:21]

Use kPCOnStackSize to make fully cross-platform

+#else
+      reinterpret_cast<Address*>(sp - 1 * kHWRegSize));
+#endif
 }
 
 
@@ -1499,9 +1503,13 @@
                           FixedArray* array,
                           int offset,
                           int previous_handler_offset) const {
+#ifndef V8_TARGET_ARCH_X32
   STATIC_ASSERT(StackHandlerConstants::kSlotCount == 5);

[danno, 2013/07/17 13:33:21]

Compute using kPCOnStackSize to make fully cross-platform

+#else
+  STATIC_ASSERT(StackHandlerConstants::kSlotCount == 6);
+#endif
   ASSERT_LE(0, offset);
-  ASSERT_GE(array->length(), offset + 5);
+  ASSERT_GE(array->length(), offset + StackHandlerConstants::kSlotCount);
   // Unwinding a stack handler into an array chains it in the opposite
   // direction, re-using the "next" slot as a "previous" link, so that stack
   // handlers can be later re-wound in the correct order.  Decode the "state"
@@ -1511,6 +1519,9 @@
   array->set(offset + 2, Smi::FromInt(static_cast<int>(index())));  // state
   array->set(offset + 3, *context_address());                       // context
   array->set(offset + 4, Smi::FromInt(static_cast<int>(kind())));   // fp
+#if V8_TARGET_ARCH_X32
+  array->set(offset + 5, Smi::FromInt(0));                // high-32 bit of fp
+#endif
 
   *isolate->handler_address() = next()->address();
 }
@@ -1520,9 +1531,13 @@
                          FixedArray* array,
                          int offset,
                          Address fp) {
+#ifndef V8_TARGET_ARCH_X32
   STATIC_ASSERT(StackHandlerConstants::kSlotCount == 5);
+#else
+  STATIC_ASSERT(StackHandlerConstants::kSlotCount == 6);
+#endif
   ASSERT_LE(0, offset);
-  ASSERT_GE(array->length(), offset + 5);
+  ASSERT_GE(array->length(), offset + StackHandlerConstants::kSlotCount);
   Smi* prev_handler_offset = Smi::cast(array->get(offset));
   Code* code = Code::cast(array->get(offset + 1));
   Smi* smi_index = Smi::cast(array->get(offset + 2));
@@ -1539,6 +1554,9 @@
   Memory::Object_at(address() + StackHandlerConstants::kContextOffset) =
       context;
   Memory::Address_at(address() + StackHandlerConstants::kFPOffset) = fp;
+#if V8_TARGET_ARCH_X32
+  Memory::Address_at(address() + StackHandlerConstants::kFPOffset + 4) = 0;
+#endif
 
   *isolate->handler_address() = address();