Assembler changes for enabling GrowHeap in Wasm

src/mips/assembler-mips-inl.h

 
 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
@@ skipping 84 matching lines @@
     Assembler::FlushICache(isolate_, p, count * sizeof(uint32_t));
   }
 }
 
 
 Address RelocInfo::target_address() {
   DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_));
   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);
   // Read the address of the word containing the target_address in an
   // instruction stream.
   // The only architecture-independent user of this function is the serializer.
   // The serializer uses it to find out how many raw bytes of instruction to
@@ skipping 30 matching lines @@
   Assembler::set_target_address_at(isolate_, pc_, host_, target,
                                    icache_flush_mode);
   if (write_barrier_mode == UPDATE_WRITE_BARRIER &&
       host() != NULL && IsCodeTarget(rmode_)) {
     Object* target_code = Code::GetCodeFromTargetAddress(target);
     host()->GetHeap()->incremental_marking()->RecordWriteIntoCode(
         host(), this, HeapObject::cast(target_code));
   }
 }
 
+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);
+}
 
 Address Assembler::target_address_from_return_address(Address pc) {
   return pc - kCallTargetAddressOffset;
 }
 
 
 void Assembler::set_target_internal_reference_encoded_at(Address pc,
                                                          Address target) {
   Instr instr1 = Assembler::instr_at(pc + 0 * Assembler::kInstrSize);
   Instr instr2 = Assembler::instr_at(pc + 1 * Assembler::kInstrSize);
@@ skipping 314 matching lines @@
     CheckBuffer();
   }
   EmitHelper(x, is_compact_branch);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MIPS_ASSEMBLER_MIPS_INL_H_