hotspot/src/cpu/x86/vm/registerMap_x86.hpp
author iveresov
Sun, 27 Mar 2011 13:17:37 -0700
changeset 8871 5c3b26c4119e
parent 7397 5b173b4ca846
child 33160 c59f1676d27e
permissions -rw-r--r--
6964776: c2 should ensure the polling page is reachable on 64 bit Summary: Materialize the pointer to the polling page in a register instead of using rip-relative addressing when the distance from the code cache is larger than disp32. Reviewed-by: never, kvn
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/*
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 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef CPU_X86_VM_REGISTERMAP_X86_HPP
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#define CPU_X86_VM_REGISTERMAP_X86_HPP
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// machine-dependent implemention for register maps
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  friend class frame;
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 private:
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  // This is the hook for finding a register in an "well-known" location,
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  // such as a register block of a predetermined format.
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  // Since there is none, we just return NULL.
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  // See registerMap_sparc.hpp for an example of grabbing registers
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  // from register save areas of a standard layout.
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   address pd_location(VMReg reg) const {return NULL;}
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  // no PD state to clear or copy:
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  void pd_clear() {}
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  void pd_initialize() {}
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  void pd_initialize_from(const RegisterMap* map) {}
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#endif // CPU_X86_VM_REGISTERMAP_X86_HPP