Mercurial > hg > truffle
view src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp @ 1352:895d9ade6111
Merge
author | asaha |
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date | Tue, 06 Apr 2010 22:06:57 -0700 |
parents | dc7f315e41f7 |
children | c18cbe5936b8 |
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/* * Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ #include "incls/_precompiled.incl" #include "incls/_assembler_windows_x86.cpp.incl" void MacroAssembler::int3() { emit_byte(0xCC); } #ifndef _LP64 // The current scheme to accelerate access to the thread // pointer is to store the current thread in the os_exception_wrapper // and reference the current thread from stubs and compiled code // via the FS register. FS[0] contains a pointer to the structured // exception block which is actually a stack address. The first time // we call the os exception wrapper, we calculate and store the // offset from this exception block and use that offset here. // // The last mechanism we used was problematic in that the // the offset we had hard coded in the VM kept changing as Microsoft // evolved the OS. // // Warning: This mechanism assumes that we only attempt to get the // thread when we are nested below a call wrapper. // // movl reg, fs:[0] Get exeception pointer // movl reg, [reg + thread_ptr_offset] Load thread // void MacroAssembler::get_thread(Register thread) { // can't use ExternalAddress because it can't take NULL AddressLiteral null(0, relocInfo::none); prefix(FS_segment); movptr(thread, null); assert(ThreadLocalStorage::get_thread_ptr_offset() != 0, "Thread Pointer Offset has not been initialized"); movl(thread, Address(thread, ThreadLocalStorage::get_thread_ptr_offset())); } #else // call (Thread*)TlsGetValue(thread_index()); void MacroAssembler::get_thread(Register thread) { if (thread != rax) { push(rax); } push(rdi); push(rsi); push(rdx); push(rcx); push(r8); push(r9); push(r10); // XXX mov(r10, rsp); andq(rsp, -16); push(r10); push(r11); movl(c_rarg0, ThreadLocalStorage::thread_index()); call(RuntimeAddress((address)TlsGetValue)); pop(r11); pop(rsp); pop(r10); pop(r9); pop(r8); pop(rcx); pop(rdx); pop(rsi); pop(rdi); if (thread != rax) { mov(thread, rax); pop(rax); } } #endif