1 /*
 2  * Copyright (c) 1998, 2021, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24 
25 #ifndef CPU_ZERO_REGISTERMAP_ZERO_HPP
26 #define CPU_ZERO_REGISTERMAP_ZERO_HPP
27 
28   // machine-dependent implemention for register maps
29   friend class frame;
30 
31  private:
32   // This is the hook for finding a register in an "well-known" location,
33   // such as a register block of a predetermined format.
34   // Since there is none, we just return NULL.
35   address pd_location(VMReg reg) const { return NULL; }
36 
37   address pd_location(VMReg base_reg, int slot_idx) const {
38     return location(base_reg->next(slot_idx));
39   }
40 
41   // no PD state to clear or copy:
42   void pd_clear() {}
43   void pd_initialize() {}
44   void pd_initialize_from(const RegisterMap* map) {}
45 
46 #endif // CPU_ZERO_REGISTERMAP_ZERO_HPP