350 
 351   a.mov(rscratch1, entry);
 352   a.br(rscratch1);
 353 
 354   ICache::invalidate_range(code_pos, instruction_size);
 355 }
 356 
 357 // MT-safe patching of a long jump instruction.
 358 void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) {
 359   ShouldNotCallThis();
 360 }
 361 
 362 address NativeCallTrampolineStub::destination(nmethod *nm) const {
 363   return ptr_at(data_offset);
 364 }
 365 
 366 void NativeCallTrampolineStub::set_destination(address new_destination) {
 367   set_ptr_at(data_offset, new_destination);
 368   OrderAccess::release();
 369 }

 350 
 351   a.mov(rscratch1, entry);
 352   a.br(rscratch1);
 353 
 354   ICache::invalidate_range(code_pos, instruction_size);
 355 }
 356 
 357 // MT-safe patching of a long jump instruction.
 358 void NativeGeneralJump::replace_mt_safe(address instr_addr, address code_buffer) {
 359   ShouldNotCallThis();
 360 }
 361 
 362 address NativeCallTrampolineStub::destination(nmethod *nm) const {
 363   return ptr_at(data_offset);
 364 }
 365 
 366 void NativeCallTrampolineStub::set_destination(address new_destination) {
 367   set_ptr_at(data_offset, new_destination);
 368   OrderAccess::release();
 369 }
 370 
 371 // Generate a trampoline for a branch to dest.  If there's no need for a
 372 // trampoline, simply patch the call directly to dest.
 373 address NativeCall::trampoline_jump(CodeBuffer &cbuf, address dest) {
 374   MacroAssembler a(&cbuf);
 375   address stub = NULL;
 376 
 377   if (a.far_branches()
 378       && ! is_NativeCallTrampolineStub_at(instruction_address() + displacement())) {
 379     stub = a.emit_trampoline_stub(instruction_address() - cbuf.insts()->start(), dest);
 380   }
 381 
 382   if (stub == NULL) {
 383     // If we generated no stub, patch this call directly to dest.
 384     // This will happen if we don't need far branches or if there
 385     // already was a trampoline.
 386     set_destination(dest);
 387   }
 388 
 389   return stub;
 390 }