--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/linux_x86/vm/assembler_linux_x86_32.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,48 @@
+/*
+ * Copyright 1999-2003 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_linux_x86_32.cpp.incl"
+
+void MacroAssembler::int3() {
+  call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
+}
+
+void MacroAssembler::get_thread(Register thread) {
+  movl(thread, rsp);
+  shrl(thread, PAGE_SHIFT);
+
+  ExternalAddress tls_base((address)ThreadLocalStorage::sp_map_addr());
+  Address index(noreg, thread, Address::times_4);
+  ArrayAddress tls(tls_base, index);
+
+  movptr(thread, tls);
+}
+
+bool MacroAssembler::needs_explicit_null_check(int offset) {
+  // Linux kernel guarantees that the first page is always unmapped. Don't
+  // assume anything more than that.
+  bool offset_in_first_page =   0 <= offset  &&  offset < os::vm_page_size();
+  return !offset_in_first_page;
+}