1 /* 2 * Copyright (c) 1999, 2008, 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 21 * questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_assembler_windows_x86.cpp.incl" 27 28 29 void MacroAssembler::int3() { 30 emit_byte(0xCC); 31 } 32 33 #ifndef _LP64 34 // The current scheme to accelerate access to the thread 35 // pointer is to store the current thread in the os_exception_wrapper 36 // and reference the current thread from stubs and compiled code 37 // via the FS register. FS[0] contains a pointer to the structured 38 // exception block which is actually a stack address. The first time 39 // we call the os exception wrapper, we calculate and store the 40 // offset from this exception block and use that offset here. 41 // 42 // The last mechanism we used was problematic in that the 43 // the offset we had hard coded in the VM kept changing as Microsoft 44 // evolved the OS. 45 // 46 // Warning: This mechanism assumes that we only attempt to get the | 1 /* 2 * Copyright (c) 1999, 2010, 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 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "asm/assembler.hpp" 27 #include "assembler_x86.inline.hpp" 28 #include "runtime/os.hpp" 29 #include "runtime/threadLocalStorage.hpp" 30 31 32 void MacroAssembler::int3() { 33 emit_byte(0xCC); 34 } 35 36 #ifndef _LP64 37 // The current scheme to accelerate access to the thread 38 // pointer is to store the current thread in the os_exception_wrapper 39 // and reference the current thread from stubs and compiled code 40 // via the FS register. FS[0] contains a pointer to the structured 41 // exception block which is actually a stack address. The first time 42 // we call the os exception wrapper, we calculate and store the 43 // offset from this exception block and use that offset here. 44 // 45 // The last mechanism we used was problematic in that the 46 // the offset we had hard coded in the VM kept changing as Microsoft 47 // evolved the OS. 48 // 49 // Warning: This mechanism assumes that we only attempt to get the |