1 /*
   2  * Copyright (c) 1997, 2011, 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.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
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  24 
  25 #ifndef CPU_SPARC_VM_STUBROUTINES_SPARC_HPP
  26 #define CPU_SPARC_VM_STUBROUTINES_SPARC_HPP
  27 
  28 // This file holds the platform specific parts of the StubRoutines
  29 // definition. See stubRoutines.hpp for a description on how to
  30 // extend it.
  31 
  32 
  33 // So unfortunately c2 will call with a pc from a frame object
  34 // (already adjusted) and a raw pc (unadjusted), so we need to check both.
  35 // It didn't use to be like this before adapter removal.
  36 static bool returns_to_call_stub(address return_pc)   {
  37   return ((return_pc + frame::pc_return_offset) == _call_stub_return_address) ||
  38           (return_pc == _call_stub_return_address );
  39 }
  40 
  41 enum /* platform_dependent_constants */ {
  42   // %%%%%%%% May be able to shrink this a lot
  43   code_size1 = 20000,           // simply increase if too small (assembler will crash if too small)
  44   code_size2 = 20000            // simply increase if too small (assembler will crash if too small)
  45 };
  46 
  47 class Sparc {
  48  friend class StubGenerator;
  49 
  50  private:
  51   static address _test_stop_entry;
  52   static address _stop_subroutine_entry;
  53   static address _flush_callers_register_windows_entry;
  54 
  55   static address _partial_subtype_check;
  56 
  57  public:
  58   // test assembler stop routine by setting registers
  59   static void (*test_stop_entry()) ()                     { return CAST_TO_FN_PTR(void (*)(void), _test_stop_entry); }
  60 
  61   // a subroutine for debugging assembler code
  62   static address stop_subroutine_entry_address()          { return (address)&_stop_subroutine_entry; }
  63 
  64   // flushes (all but current) register window
  65   static intptr_t* (*flush_callers_register_windows_func())() { return CAST_TO_FN_PTR(intptr_t* (*)(void), _flush_callers_register_windows_entry); }
  66 
  67   static address partial_subtype_check()                  { return _partial_subtype_check; }
  68 };
  69 
  70 #endif // CPU_SPARC_VM_STUBROUTINES_SPARC_HPP