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/*
* Copyright (C) 2016-2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "JSCPtrTag.h"
namespace JSC {
namespace LLInt {
// These are used just to denote where LLInt code begins and where it ends.
extern "C" {
void llintPCRangeStart();
void llintPCRangeEnd();
#if ENABLE(WEBASSEMBLY)
void wasmLLIntPCRangeStart();
void wasmLLIntPCRangeEnd();
#endif
}
ALWAYS_INLINE bool isLLIntPC(void* pc)
{
uintptr_t pcAsInt = std::bit_cast<uintptr_t>(pc);
uintptr_t llintStart = untagCodePtr<uintptr_t, CFunctionPtrTag>(llintPCRangeStart);
uintptr_t llintEnd = untagCodePtr<uintptr_t, CFunctionPtrTag>(llintPCRangeEnd);
RELEASE_ASSERT(llintStart < llintEnd);
return llintStart <= pcAsInt && pcAsInt <= llintEnd;
}
#if ENABLE(WEBASSEMBLY)
ALWAYS_INLINE bool isWasmLLIntPC(void* pc)
{
uintptr_t pcAsInt = std::bit_cast<uintptr_t>(pc);
uintptr_t start = untagCodePtr<uintptr_t, CFunctionPtrTag>(wasmLLIntPCRangeStart);
uintptr_t end = untagCodePtr<uintptr_t, CFunctionPtrTag>(wasmLLIntPCRangeEnd);
RELEASE_ASSERT(start < end);
return start <= pcAsInt && pcAsInt <= end;
}
#endif
#if !ENABLE(C_LOOP)
static constexpr GPRReg LLIntPC = GPRInfo::regT4;
#endif
} } // namespace JSC::LLInt
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