0
|
1 /*
|
|
2 * Copyright 1999-2003 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 // Processor dependent parts of ThreadLocalStorage
|
|
26
|
|
27 #ifndef AMD64
|
|
28 // map stack pointer to thread pointer - see notes in threadLS_linux_x86.cpp
|
|
29 #define SP_BITLENGTH 32
|
|
30 #define PAGE_SHIFT 12
|
|
31 #define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
32 static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)];
|
|
33 #endif // !AMD64
|
|
34
|
|
35 public:
|
|
36
|
|
37 #ifndef AMD64
|
|
38 static Thread** sp_map_addr() { return _sp_map; }
|
|
39 #endif // !AMD64
|
|
40
|
|
41 static Thread* thread() {
|
|
42 #ifdef AMD64
|
|
43 return (Thread*) os::thread_local_storage_at(thread_index());
|
|
44 #else
|
|
45 uintptr_t sp;
|
|
46 __asm__ volatile ("movl %%esp, %0" : "=r" (sp));
|
|
47 return _sp_map[sp >> PAGE_SHIFT];
|
|
48 #endif // AMD64
|
|
49 }
|