1 /* 2 * Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 // This file holds the platform specific parts of the StubRoutines 26 // definition. See stubRoutines.hpp for a description on how to 27 // extend it. 28 29 enum platform_dependent_constants { 30 code_size1 = 9000, // simply increase if too small (assembler will crash if too small) 31 code_size2 = 22000 // simply increase if too small (assembler will crash if too small) 32 }; 33 34 class x86 { 35 friend class StubGenerator; 36 friend class VMStructs; 37 38 private: 39 // If we call compiled code directly from the call stub we will 40 // need to adjust the return back to the call stub to a specialized 41 // piece of code that can handle compiled results and cleaning the fpu 42 // stack. The variable holds that location. 43 static address _call_stub_compiled_return; 44 static address _verify_mxcsr_entry; 45 static address _verify_fpu_cntrl_wrd_entry; 46 static jint _mxcsr_std; 47 48 public: 49 static address verify_mxcsr_entry() { return _verify_mxcsr_entry; } 50 static address verify_fpu_cntrl_wrd_entry() { return _verify_fpu_cntrl_wrd_entry; } 51 52 static address get_call_stub_compiled_return() { return _call_stub_compiled_return; } 53 static void set_call_stub_compiled_return(address ret) { _call_stub_compiled_return = ret; } 54 }; 55 56 static bool returns_to_call_stub(address return_pc) { return (return_pc == _call_stub_return_address) || 57 return_pc == x86::get_call_stub_compiled_return(); }