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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // This file holds the platform specific parts of the StubRoutines
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26 // definition. See stubRoutines.hpp for a description on how to
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27 // extend it.
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28
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29 enum platform_dependent_constants {
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30 code_size1 = 9000, // simply increase if too small (assembler will crash if too small)
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31 code_size2 = 22000 // simply increase if too small (assembler will crash if too small)
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32 };
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33
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34 class i486 {
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35 friend class StubGenerator;
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36 friend class VMStructs;
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37
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38 private:
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39 // If we call compiled code directly from the call stub we will
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40 // need to adjust the return back to the call stub to a specialized
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41 // piece of code that can handle compiled results and cleaning the fpu
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42 // stack. The variable holds that location.
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43 static address _call_stub_compiled_return;
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44 static address _verify_mxcsr_entry;
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45 static address _verify_fpu_cntrl_wrd_entry;
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46 static jint _mxcsr_std;
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47
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48 public:
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49 static address verify_mxcsr_entry() { return _verify_mxcsr_entry; }
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50 static address verify_fpu_cntrl_wrd_entry() { return _verify_fpu_cntrl_wrd_entry; }
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51
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52 static address get_call_stub_compiled_return() { return _call_stub_compiled_return; }
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53 static void set_call_stub_compiled_return(address ret) { _call_stub_compiled_return = ret; }
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54 };
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55
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56 static bool returns_to_call_stub(address return_pc) { return (return_pc == _call_stub_return_address) ||
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57 return_pc == i486::get_call_stub_compiled_return(); }
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