Mercurial > hg > graal-compiler
annotate src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp @ 1961:deef066c3622
Merge
author | johnc |
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date | Tue, 16 Nov 2010 16:12:28 -0800 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
304 | 26 #include "incls/_assembler_windows_x86.cpp.incl" |
0 | 27 |
28 | |
29 void MacroAssembler::int3() { | |
30 emit_byte(0xCC); | |
31 } | |
32 | |
304 | 33 #ifndef _LP64 |
0 | 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 } | |
304 | 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 |