Contribution of PowerPC port.

src/serialize.cc

Index: src/serialize.cc
diff --git a/src/serialize.cc b/src/serialize.cc
index 4b28d23fe9ac060f73c46c84fb5076739c99a7f5..eda9771b511e91a8ce8f30ff5246d2a351114b7e 100644
--- a/src/serialize.cc
+++ b/src/serialize.cc
@@ -800,6 +800,23 @@ void Deserializer::ReadObject(int space_number,
   bool is_codespace = (space_number == CODE_SPACE);
   DCHECK(obj->IsCode() == is_codespace);
 #endif
+#if V8_TARGET_ARCH_PPC && \
+    (ABI_USES_FUNCTION_DESCRIPTORS || V8_OOL_CONSTANT_POOL)
+  // If we're on a platform that uses function descriptors
+  // these jump tables make use of RelocInfo::INTERNAL_REFERENCE.
+  // As the V8 serialization code doesn't handle that relocation type
+  // we use this hack to fix up code that has function descriptors.
+  if (space_number == CODE_SPACE) {
+    Code* code = reinterpret_cast<Code*>(HeapObject::FromAddress(address));
+    for (RelocIterator it(code); !it.done(); it.next()) {
+      RelocInfo::Mode rmode = it.rinfo()->rmode();
+      if (rmode == RelocInfo::INTERNAL_REFERENCE) {
+        Assembler::RelocateInternalReference(it.rinfo()->pc(), 0,
+                                             code->instruction_start());
+      }
+    }
+  }
+#endif
 }
 
 void Deserializer::ReadChunk(Object** current,
@@ -1062,16 +1079,16 @@ void Deserializer::ReadChunk(Object** current,
       // allocation point and write a pointer to it to the current object.
       ALL_SPACES(kBackref, kPlain, kStartOfObject)
       ALL_SPACES(kBackrefWithSkip, kPlain, kStartOfObject)
-#if defined(V8_TARGET_ARCH_MIPS) || V8_OOL_CONSTANT_POOL || \
-    defined(V8_TARGET_ARCH_MIPS64)
+#if defined(V8_TARGET_ARCH_MIPS) || defined(V8_TARGET_ARCH_MIPS64) || \
+    defined(V8_TARGET_ARCH_PPC) || V8_OOL_CONSTANT_POOL
       // Deserialize a new object from pointer found in code and write
-      // a pointer to it to the current object. Required only for MIPS or ARM
-      // with ool constant pool, and omitted on the other architectures because
-      // it is fully unrolled and would cause bloat.
+      // a pointer to it to the current object. Required only for MIPS, PPC or
+      // ARM with ool constant pool, and omitted on the other architectures
+      // because it is fully unrolled and would cause bloat.
       ALL_SPACES(kNewObject, kFromCode, kStartOfObject)
       // Find a recently deserialized code object using its offset from the
       // current allocation point and write a pointer to it to the current
-      // object. Required only for MIPS or ARM with ool constant pool.
+      // object. Required only for MIPS, PPC or ARM with ool constant pool.
       ALL_SPACES(kBackref, kFromCode, kStartOfObject)
       ALL_SPACES(kBackrefWithSkip, kFromCode, kStartOfObject)
 #endif
@@ -1291,8 +1308,8 @@ int Serializer::RootIndex(HeapObject* heap_object, HowToCode from) {
   for (int i = 0; i < root_index_wave_front_; i++) {
     Object* root = heap->roots_array_start()[i];
     if (!root->IsSmi() && root == heap_object) {
-#if defined(V8_TARGET_ARCH_MIPS) || V8_OOL_CONSTANT_POOL || \
-    defined(V8_TARGET_ARCH_MIPS64)
+#if defined(V8_TARGET_ARCH_MIPS) || defined(V8_TARGET_ARCH_MIPS64) || \
+    defined(V8_TARGET_ARCH_PPC) || V8_OOL_CONSTANT_POOL
       if (from == kFromCode) {
         // In order to avoid code bloat in the deserializer we don't have
         // support for the encoding that specifies a particular root should