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comparison src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp @ 304:dc7f315e41f7

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5108146: Merge i486 and amd64 cpu directories 6459804: Want client (c1) compiler for x86_64 (amd64) for faster start-up Reviewed-by: kvn
author never
date Wed, 27 Aug 2008 00:21:55 -0700
parents src/os_cpu/windows_x86/vm/assembler_windows_x86_32.cpp@1fdb98a17101
children c18cbe5936b8
comparison
equal deleted inserted replaced
303:fa4d1d240383 304:dc7f315e41f7
1 /*
2 * Copyright 1999-2008 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 #include "incls/_precompiled.incl"
26 #include "incls/_assembler_windows_x86.cpp.incl"
27
28
29 void MacroAssembler::int3() {
30 emit_byte(0xCC);
31 }
32
33 #ifndef _LP64
34 // The current scheme to accelerate access to the thread
35 // pointer is to store the current thread in the os_exception_wrapper
36 // and reference the current thread from stubs and compiled code
37 // via the FS register. FS[0] contains a pointer to the structured
38 // exception block which is actually a stack address. The first time
39 // we call the os exception wrapper, we calculate and store the
40 // offset from this exception block and use that offset here.
41 //
42 // The last mechanism we used was problematic in that the
43 // the offset we had hard coded in the VM kept changing as Microsoft
44 // evolved the OS.
45 //
46 // Warning: This mechanism assumes that we only attempt to get the
47 // thread when we are nested below a call wrapper.
48 //
49 // movl reg, fs:[0] Get exeception pointer
50 // movl reg, [reg + thread_ptr_offset] Load thread
51 //
52 void MacroAssembler::get_thread(Register thread) {
53 // can't use ExternalAddress because it can't take NULL
54 AddressLiteral null(0, relocInfo::none);
55
56 prefix(FS_segment);
57 movptr(thread, null);
58 assert(ThreadLocalStorage::get_thread_ptr_offset() != 0,
59 "Thread Pointer Offset has not been initialized");
60 movl(thread, Address(thread, ThreadLocalStorage::get_thread_ptr_offset()));
61 }
62 #else
63 // call (Thread*)TlsGetValue(thread_index());
64 void MacroAssembler::get_thread(Register thread) {
65 if (thread != rax) {
66 push(rax);
67 }
68 push(rdi);
69 push(rsi);
70 push(rdx);
71 push(rcx);
72 push(r8);
73 push(r9);
74 push(r10);
75 // XXX
76 mov(r10, rsp);
77 andq(rsp, -16);
78 push(r10);
79 push(r11);
80
81 movl(c_rarg0, ThreadLocalStorage::thread_index());
82 call(RuntimeAddress((address)TlsGetValue));
83
84 pop(r11);
85 pop(rsp);
86 pop(r10);
87 pop(r9);
88 pop(r8);
89 pop(rcx);
90 pop(rdx);
91 pop(rsi);
92 pop(rdi);
93 if (thread != rax) {
94 mov(thread, rax);
95 pop(rax);
96 }
97 }
98 #endif