1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 : * vim: set ts=4 sw=4 et tw=99:
3 : *
4 : * ***** BEGIN LICENSE BLOCK *****
5 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6 : *
7 : * The contents of this file are subject to the Mozilla Public License Version
8 : * 1.1 (the "License"); you may not use this file except in compliance with
9 : * the License. You may obtain a copy of the License at
10 : * http://www.mozilla.org/MPL/
11 : *
12 : * Software distributed under the License is distributed on an "AS IS" basis,
13 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14 : * for the specific language governing rights and limitations under the
15 : * License.
16 : *
17 : * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
18 : * May 28, 2008.
19 : *
20 : * The Initial Developer of the Original Code is
21 : * Brendan Eich <brendan@mozilla.org>
22 : *
23 : * Contributor(s):
24 : * David Mandelin <dmandelin@mozilla.com>
25 : * David Anderson <danderson@mozilla.com>
26 : * Chris Leary <cdleary@mozilla.com>
27 : * Jacob Bramley <Jacob.Bramely@arm.com>
28 : *
29 : * Alternatively, the contents of this file may be used under the terms of
30 : * either of the GNU General Public License Version 2 or later (the "GPL"),
31 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
32 : * in which case the provisions of the GPL or the LGPL are applicable instead
33 : * of those above. If you wish to allow use of your version of this file only
34 : * under the terms of either the GPL or the LGPL, and not to allow others to
35 : * use your version of this file under the terms of the MPL, indicate your
36 : * decision by deleting the provisions above and replace them with the notice
37 : * and other provisions required by the GPL or the LGPL. If you do not delete
38 : * the provisions above, a recipient may use your version of this file under
39 : * the terms of any one of the MPL, the GPL or the LGPL.
40 : *
41 : * ***** END LICENSE BLOCK ***** */
42 :
43 : #if !defined jsjaeger_icchecker_h__ && defined JS_METHODJIT
44 : #define jsjaeger_icchecker_h__
45 :
46 : #include "assembler/assembler/MacroAssembler.h"
47 :
48 : namespace js {
49 : namespace mjit {
50 :
51 : #if defined DEBUG && defined JS_CPU_ARM
52 : static inline void
53 : CheckInstMask(void *addr, uint32_t mask, uint32_t expected)
54 : {
55 : uint32_t inst = *static_cast<uint32_t *>(addr);
56 : JS_ASSERT((inst & mask) == expected);
57 : }
58 :
59 : static inline void
60 : CheckIsLDR(JSC::CodeLocationLabel label, uint8_t rd)
61 : {
62 : JS_ASSERT((rd & 0xf) == rd);
63 : CheckInstMask(label.executableAddress(), 0xfc50f000, 0xe4100000 | (rd << 12));
64 : }
65 :
66 : static inline void
67 : CheckIsBLX(JSC::CodeLocationLabel label, uint8_t rsrc)
68 : {
69 : JS_ASSERT((rsrc & 0xf) == rsrc);
70 : CheckInstMask(label.executableAddress(), 0xfff000ff, 0xe1200030 | rsrc);
71 : }
72 :
73 : static inline void
74 : CheckIsStubCall(JSC::CodeLocationLabel label)
75 : {
76 : CheckIsLDR(label.labelAtOffset(-4), JSC::ARMRegisters::ip);
77 : CheckIsLDR(label.labelAtOffset(0), JSC::ARMRegisters::r8);
78 : CheckIsBLX(label.labelAtOffset(4), JSC::ARMRegisters::r8);
79 : }
80 : #else
81 5692 : static inline void CheckIsStubCall(JSC::CodeLocationLabel label) {}
82 : #endif
83 :
84 : } /* namespace mjit */
85 : } /* namespace js */
86 :
87 : #endif
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