1/*
2 * Copyright (C) 2016-2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "JSCPtrTag.h"
29
30namespace JSC {
31
32namespace LLInt {
33
34// These are used just to denote where LLInt code begins and where it ends.
35extern "C" {
36 void llintPCRangeStart();
37 void llintPCRangeEnd();
38}
39
40ALWAYS_INLINE bool isLLIntPC(void* pc)
41{
42 uintptr_t pcAsInt = bitwise_cast<uintptr_t>(pc);
43 uintptr_t llintStart = untagCodePtr<uintptr_t>(llintPCRangeStart, CFunctionPtrTag);
44 uintptr_t llintEnd = untagCodePtr<uintptr_t>(llintPCRangeEnd, CFunctionPtrTag);
45 RELEASE_ASSERT(llintStart < llintEnd);
46 return llintStart <= pcAsInt && pcAsInt <= llintEnd;
47}
48
49#if !ENABLE(C_LOOP)
50static constexpr GPRReg LLIntPC = GPRInfo::regT4;
51#endif
52
53} } // namespace JSC::LLInt
54