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1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef V8_MIPS_CODE_STUBS_MIPS_H_
6 #define V8_MIPS_CODE_STUBS_MIPS_H_
7 
8 namespace v8 {
9 namespace internal {
10 
11 // Trampoline stub to call into native code. To call safely into native code
12 // in the presence of compacting GC (which can move code objects) we need to
13 // keep the code which called into native pinned in the memory. Currently the
14 // simplest approach is to generate such stub early enough so it can never be
15 // moved by GC
16 class DirectCEntryStub: public PlatformCodeStub {
17  public:
DirectCEntryStub(Isolate * isolate)18   explicit DirectCEntryStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
19   void GenerateCall(MacroAssembler* masm, Register target);
20 
21  private:
NeedsImmovableCode()22   Movability NeedsImmovableCode() override { return kImmovable; }
23 
24   DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
25   DEFINE_PLATFORM_CODE_STUB(DirectCEntry, PlatformCodeStub);
26 };
27 
28 }  // namespace internal
29 }  // namespace v8
30 
31 #endif  // V8_MIPS_CODE_STUBS_MIPS_H_
32