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/macroAssembler.hpp" 27 #include "asm/macroAssembler.inline.hpp" 28 #include "runtime/os.hpp" 29 #include "runtime/threadLocalStorage.hpp" 30 31 32 void MacroAssembler::int3() { 33 emit_int8((unsigned char)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 50 // thread when we are nested below a call wrapper. 51 // 52 // movl reg, fs:[0] Get exeception pointer 53 // movl reg, [reg + thread_ptr_offset] Load thread 54 // 55 void MacroAssembler::get_thread(Register thread) { 56 // can't use ExternalAddress because it can't take NULL 57 AddressLiteral null(0, relocInfo::none); 58 59 prefix(FS_segment); 60 movptr(thread, null); 61 assert(ThreadLocalStorage::get_thread_ptr_offset() != 0, 62 "Thread Pointer Offset has not been initialized"); 63 movl(thread, Address(thread, ThreadLocalStorage::get_thread_ptr_offset())); 64 } 65 #else 66 // call (Thread*)TlsGetValue(thread_index()); 67 void MacroAssembler::get_thread(Register thread) { 68 if (thread != rax) { 69 push(rax); 70 } 71 push(rdi); 72 push(rsi); 73 push(rdx); 74 push(rcx); 75 push(r8); 76 push(r9); 77 push(r10); 78 // XXX 79 mov(r10, rsp); 80 andq(rsp, -16); 81 push(r10); 82 push(r11); 83 84 movl(c_rarg0, ThreadLocalStorage::thread_index()); 85 call(RuntimeAddress((address)TlsGetValue)); 86 87 pop(r11); 88 pop(rsp); 89 pop(r10); 90 pop(r9); 91 pop(r8); 92 pop(rcx); 93 pop(rdx); 94 pop(rsi); 95 pop(rdi); 96 if (thread != rax) { 97 mov(thread, rax); 98 pop(rax); 99 } 100 } 101 #endif | 1 /* 2 * Copyright (c) 1999, 2015, 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/macroAssembler.hpp" 27 #include "asm/macroAssembler.inline.hpp" 28 #include "runtime/os.hpp" 29 30 void MacroAssembler::int3() { 31 emit_int8((unsigned char)0xCC); 32 } 33 34 #ifndef _LP64 35 // The current scheme to accelerate access to the thread 36 // pointer is to store the current thread in the os_exception_wrapper 37 // and reference the current thread from stubs and compiled code 38 // via the FS register. FS[0] contains a pointer to the structured 39 // exception block which is actually a stack address. The first time 40 // we call the os exception wrapper, we calculate and store the 41 // offset from this exception block and use that offset here. 42 // 43 // The last mechanism we used was problematic in that the 44 // the offset we had hard coded in the VM kept changing as Microsoft 45 // evolved the OS. 46 // 47 // Warning: This mechanism assumes that we only attempt to get the 48 // thread when we are nested below a call wrapper. 49 // 50 // movl reg, fs:[0] Get exeception pointer 51 // movl reg, [reg + thread_ptr_offset] Load thread 52 // 53 void MacroAssembler::get_thread(Register thread) { 54 // can't use ExternalAddress because it can't take NULL 55 AddressLiteral null(0, relocInfo::none); 56 57 prefix(FS_segment); 58 movptr(thread, null); 59 assert(os::win32::get_thread_ptr_offset() != 0, 60 "Thread Pointer Offset has not been initialized"); 61 movl(thread, Address(thread, os::win32::get_thread_ptr_offset())); 62 } 63 64 // #else - use shared x86 implementation in cpu/x86/vm/macroAssembler_x86.cpp 65 66 #endif |