1 #ifdef USE_PRAGMA_IDENT_HDR 2 #pragma ident "@(#)stubRoutines_x86_32.hpp 1.71 07/05/05 17:04:20 JVM" 3 #endif 4 /* 5 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. 6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 7 * 8 * This code is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License version 2 only, as 10 * published by the Free Software Foundation. 11 * 12 * This code is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * version 2 for more details (a copy is included in the LICENSE file that 16 * accompanied this code). 17 * 18 * You should have received a copy of the GNU General Public License version 19 * 2 along with this work; if not, write to the Free Software Foundation, 20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 21 * 22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 23 * CA 95054 USA or visit www.sun.com if you need additional information or 24 * have any questions. 25 * 26 */ 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 enum platform_dependent_constants { 33 code_size1 = 9000, // simply increase if too small (assembler will crash if too small) 34 code_size2 = 22000 // simply increase if too small (assembler will crash if too small) 35 }; 36 37 class i486 { 38 friend class StubGenerator; 39 friend class VMStructs; 40 41 private: 42 // If we call compiled code directly from the call stub we will 43 // need to adjust the return back to the call stub to a specialized 44 // piece of code that can handle compiled results and cleaning the fpu 45 // stack. The variable holds that location. 46 static address _call_stub_compiled_return; 47 static address _verify_mxcsr_entry; 48 static address _verify_fpu_cntrl_wrd_entry; 49 static jint _mxcsr_std; 50 51 public: 52 static address verify_mxcsr_entry() { return _verify_mxcsr_entry; } 53 static address verify_fpu_cntrl_wrd_entry() { return _verify_fpu_cntrl_wrd_entry; } 54 55 static address get_call_stub_compiled_return() { return _call_stub_compiled_return; } 56 static void set_call_stub_compiled_return(address ret) { _call_stub_compiled_return = ret; } 57 }; 58 59 static bool returns_to_call_stub(address return_pc) { return (return_pc == _call_stub_return_address) || 60 return_pc == i486::get_call_stub_compiled_return(); }