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comparison src/os_cpu/bsd_x86/vm/threadLS_bsd_x86.hpp @ 3960:f08d439fab8c

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7089790: integrate bsd-port changes Reviewed-by: kvn, twisti, jrose Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author never
date Sun, 25 Sep 2011 16:03:29 -0700
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3959:eda6988c0d81 3960:f08d439fab8c
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_BSD_X86_VM_THREADLS_BSD_X86_HPP
26 #define OS_CPU_BSD_X86_VM_THREADLS_BSD_X86_HPP
27
28 // Processor dependent parts of ThreadLocalStorage
29
30 #ifndef AMD64
31 // map stack pointer to thread pointer - see notes in threadLS_bsd_x86.cpp
32 #define SP_BITLENGTH 32
33 #ifndef PAGE_SHIFT
34 #define PAGE_SHIFT 12
35 #define PAGE_SIZE (1UL << PAGE_SHIFT)
36 #endif
37 static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)];
38 #endif // !AMD64
39
40 public:
41
42 #ifndef AMD64
43 static Thread** sp_map_addr() { return _sp_map; }
44 #endif // !AMD64
45
46 static Thread* thread() {
47 #ifdef AMD64
48 return (Thread*) os::thread_local_storage_at(thread_index());
49 #else
50 uintptr_t sp;
51 __asm__ volatile ("movl %%esp, %0" : "=r" (sp));
52 return _sp_map[sp >> PAGE_SHIFT];
53 #endif // AMD64
54 }
55
56 #endif // OS_CPU_BSD_X86_VM_THREADLS_BSD_X86_HPP