[wasm] Relocatable Globals

src/arm64/assembler-arm64.cc

Index: src/arm64/assembler-arm64.cc
diff --git a/src/arm64/assembler-arm64.cc b/src/arm64/assembler-arm64.cc
index 6fddd6f29396841540e4cc17f909ae058d02671c..89219ec274b746d4774edb2285648e0a8be21556 100644
--- a/src/arm64/assembler-arm64.cc
+++ b/src/arm64/assembler-arm64.cc
@@ -189,6 +189,11 @@ uint32_t RelocInfo::wasm_memory_size_reference() {
   return Memory::uint32_at(Assembler::target_pointer_address_at(pc_));
 }
 
+Address RelocInfo::wasm_global_reference() {
+  DCHECK(IsWasmGlobalReference(rmode_));
+  return Memory::Address_at(Assembler::target_pointer_address_at(pc_));
+}
+
 void RelocInfo::update_wasm_memory_reference(
     Address old_base, Address new_base, uint32_t old_size, uint32_t new_size,
     ICacheFlushMode icache_flush_mode) {
@@ -215,6 +220,17 @@ void RelocInfo::update_wasm_memory_reference(
   }
 }
 
+void RelocInfo::update_wasm_global_reference(
+    Address old_base, Address new_base, ICacheFlushMode icache_flush_mode) {
+  DCHECK(IsWasmGlobalReference(rmode_));
+  Address updated_reference;
+  DCHECK(old_base <= wasm_global_reference());
+  updated_reference = new_base + (wasm_global_reference() - old_base);
+  DCHECK(new_base <= updated_reference);
+  Assembler::set_target_address_at(isolate_, pc_, host_, updated_reference,
+                                   icache_flush_mode);
+}
+
 Register GetAllocatableRegisterThatIsNotOneOf(Register reg1, Register reg2,
                                               Register reg3, Register reg4) {
   CPURegList regs(reg1, reg2, reg3, reg4);