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CCallHelpers.cpp
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/*
* Copyright (C) 2016-2020 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.
*/
#
include
"
config.h
"
#
include
"
CCallHelpers.h
"
#
if
ENABLE(JIT)
#
include
"
JITOperations.h
"
#
include
"
LinkBuffer.h
"
#
include
"
MaxFrameExtentForSlowPathCall.h
"
#
include
"
ShadowChicken.h
"
#
include
<
wtf/TZoneMallocInlines.h
>
namespace
JSC
{
WTF_MAKE_TZONE_ALLOCATED_IMPL
(CCallHelpers);
void
CCallHelpers::logShadowChickenProloguePacket
(GPRReg shadowPacket, GPRReg scratch1, GPRReg scope)
{
storePtr
(GPRInfo::callFrameRegister,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, frame)));
loadPtr
(
Address
(GPRInfo::callFrameRegister,
OBJECT_OFFSETOF
(CallerFrameAndPC, callerFrame)), scratch1);
storePtr
(scratch1,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, callerFrame)));
loadPtr
(
addressFor
(CallFrameSlot::callee), scratch1);
storePtr
(scratch1,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, callee)));
storePtr
(scope,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, scope)));
}
void
CCallHelpers::ensureShadowChickenPacket
(
VM
& vm, GPRReg shadowPacket, GPRReg scratch1NonArgGPR, GPRReg scratch2)
{
ShadowChicken* shadowChicken = vm.
shadowChicken
();
RELEASE_ASSERT
(shadowChicken);
ASSERT
(!
RegisterSet::argumentGPRs
().
contains
(scratch1NonArgGPR, IgnoreVectors));
move
(
TrustedImmPtr
(shadowChicken->
addressOfLogCursor
()), scratch1NonArgGPR);
loadPtr
(
Address
(scratch1NonArgGPR), shadowPacket);
Jump ok =
branchPtr
(Below, shadowPacket,
TrustedImmPtr
(shadowChicken->
logEnd
()));
setupArguments<
decltype
(operationProcessShadowChickenLog)>(
TrustedImmPtr
(&vm));
prepareCallOperation
(vm);
move
(
TrustedImmPtr
(tagCFunction<OperationPtrTag>(operationProcessShadowChickenLog)), scratch1NonArgGPR);
call
(scratch1NonArgGPR, OperationPtrTag);
move
(
TrustedImmPtr
(shadowChicken->
addressOfLogCursor
()), scratch1NonArgGPR);
loadPtr
(
Address
(scratch1NonArgGPR), shadowPacket);
ok.
link
(
this
);
addPtr
(
TrustedImm32
(
sizeof
(ShadowChicken::Packet)), shadowPacket, scratch2);
storePtr
(scratch2,
Address
(scratch1NonArgGPR));
}
template
<
typename
CodeBlockType>
void
CCallHelpers::logShadowChickenTailPacketImpl
(GPRReg shadowPacket, JSValueRegs thisRegs, GPRReg scope, CodeBlockType codeBlock, CallSiteIndex callSiteIndex)
{
storePtr
(GPRInfo::callFrameRegister,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, frame)));
storePtr
(
TrustedImmPtr
(
ShadowChicken::Packet::tailMarker
()),
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, callee)));
storeValue
(thisRegs,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, thisValue)));
storePtr
(scope,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, scope)));
storePtr
(codeBlock,
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, codeBlock)));
store32
(
TrustedImm32
(callSiteIndex.
bits
()),
Address
(shadowPacket,
OBJECT_OFFSETOF
(ShadowChicken::Packet, callSiteIndex)));
}
void
CCallHelpers::logShadowChickenTailPacket
(GPRReg shadowPacket, JSValueRegs thisRegs, GPRReg scope, GPRReg codeBlock, CallSiteIndex callSiteIndex)
{
logShadowChickenTailPacketImpl
(shadowPacket, thisRegs, scope, codeBlock, callSiteIndex);
}
static_assert
(!((maxFrameExtentForSlowPathCall +
2
*
sizeof
(CPURegister)) %
16
),
"
Stack must be aligned after CTI thunk entry
"
);
void
CCallHelpers::emitCTIThunkPrologue
(
bool
returnAddressAlreadyTagged)
{
//
Stash frame pointer and return address
if
(!returnAddressAlreadyTagged)
tagReturnAddress
();
#
if
CPU(X86_64)
push
(X86Registers::ebp);
//
return address pushed by the call instruction
#
elif
CPU(ARM64) || CPU(RISCV64)
pushPair
(framePointerRegister, linkRegister);
#
else
#
error
"Not implemented on platform"
#
endif
//
Make enough space on the stack to pass arguments in a call
if
constexpr
(!!maxFrameExtentForSlowPathCall)
subPtr
(
TrustedImm32
(maxFrameExtentForSlowPathCall), stackPointerRegister);
}
void
CCallHelpers::emitCTIThunkEpilogue
()
{
//
Reset stack
if
constexpr
(!!maxFrameExtentForSlowPathCall)
addPtr
(
TrustedImm32
(maxFrameExtentForSlowPathCall), stackPointerRegister);
//
Restore frame pointer and return address
#
if
CPU(X86_64)
pop
(X86Registers::ebp);
//
Return address left on stack
#
elif
CPU(ARM64) || CPU(RISCV64)
popPair
(framePointerRegister, linkRegister);
#
else
#
error
"Not implemented on platform"
#
endif
}
}
//
namespace JSC
#
endif
//
ENABLE(JIT)
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