1 /*
2 * Copyright (c) 1999, 2003, 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 // 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 }
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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 #ifndef OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP
26 #define OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP
27
28 // Processor dependent parts of ThreadLocalStorage
29
30 #ifndef AMD64
31 // map stack pointer to thread pointer - see notes in threadLS_linux_x86.cpp
32 #define SP_BITLENGTH 32
33 #define PAGE_SHIFT 12
34 #define PAGE_SIZE (1UL << PAGE_SHIFT)
35 static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)];
36 #endif // !AMD64
37
38 public:
39
40 #ifndef AMD64
41 static Thread** sp_map_addr() { return _sp_map; }
42 #endif // !AMD64
43
44 static Thread* thread() {
45 #ifdef AMD64
46 return (Thread*) os::thread_local_storage_at(thread_index());
47 #else
48 uintptr_t sp;
49 __asm__ volatile ("movl %%esp, %0" : "=r" (sp));
50 return _sp_map[sp >> PAGE_SHIFT];
51 #endif // AMD64
52 }
53
54 #endif // OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP
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