S390: Assembler changes for enabling GrowHeap in Wasm

src/s390/assembler-s390-inl.h

Index: src/s390/assembler-s390-inl.h
diff --git a/src/s390/assembler-s390-inl.h b/src/s390/assembler-s390-inl.h
index 14413d60a156c1873fe8d2504ee292c35d00ede8..400d5436a19fddf6c0abbdf6134d5b66f6237523 100644
--- a/src/s390/assembler-s390-inl.h
+++ b/src/s390/assembler-s390-inl.h
@@ -93,6 +93,11 @@ Address RelocInfo::target_address() {
   return Assembler::target_address_at(pc_, host_);
 }
 
+Address RelocInfo::wasm_memory_reference() {
+  DCHECK(IsWasmMemoryReference(rmode_));
+  return Assembler::target_address_at(pc_, host_);
+}
+
 Address RelocInfo::target_address_address() {
   DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_) ||
          rmode_ == EMBEDDED_OBJECT || rmode_ == EXTERNAL_REFERENCE);
@@ -151,6 +156,19 @@ Handle<Object> Assembler::code_target_object_handle_at(Address pc) {
   return code_targets_[index];
 }
 
+void RelocInfo::update_wasm_memory_reference(
+    Address old_base, Address new_base, size_t old_size, size_t new_size,
+    ICacheFlushMode icache_flush_mode) {
+  DCHECK(IsWasmMemoryReference(rmode_));
+  DCHECK(old_base <= wasm_memory_reference() &&
+         wasm_memory_reference() < old_base + old_size);
+  Address updated_reference = new_base + (wasm_memory_reference() - old_base);
+  DCHECK(new_base <= updated_reference &&
+         updated_reference < new_base + new_size);
+  Assembler::set_target_address_at(isolate_, pc_, host_, updated_reference,
+                                   icache_flush_mode);
+}
+
 Object* RelocInfo::target_object() {
   DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
   return reinterpret_cast<Object*>(Assembler::target_address_at(pc_, host_));