1 /*
   2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2008, 2010 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef CPU_ZERO_VM_ENTRYFRAME_ZERO_HPP
  27 #define CPU_ZERO_VM_ENTRYFRAME_ZERO_HPP
  28 
  29 #include "runtime/javaCalls.hpp"
  30 #include "stack_zero.hpp"
  31 
  32 // |  ...               |
  33 // +--------------------+  ------------------
  34 // | parameter n-1      |       low addresses
  35 // |  ...               |
  36 // | parameter 0        |
  37 // | call_wrapper       |
  38 // | frame_type         |
  39 // | next_frame         |      high addresses
  40 // +--------------------+  ------------------
  41 // |  ...               |
  42 
  43 class EntryFrame : public ZeroFrame {
  44  private:
  45   EntryFrame() : ZeroFrame() {
  46     ShouldNotCallThis();
  47   }
  48 
  49  protected:
  50   enum Layout {
  51     call_wrapper_off = jf_header_words,
  52     header_words
  53   };
  54 
  55  public:
  56   static EntryFrame *build(const intptr_t*  parameters,
  57                            int              parameter_words,
  58                            JavaCallWrapper* call_wrapper,
  59                            TRAPS);
  60  public:
  61   JavaCallWrapper *call_wrapper() const {
  62     return (JavaCallWrapper *) value_of_word(call_wrapper_off);
  63   }
  64 
  65  public:
  66   void identify_word(int   frame_index,
  67                      int   offset,
  68                      char* fieldbuf,
  69                      char* valuebuf,
  70                      int   buflen) const;
  71 };
  72 
  73 #endif // CPU_ZERO_VM_ENTRYFRAME_ZERO_HPP