1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*
* Copyright (C) 2021 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 "SlowPathCall.h"
#if ENABLE(JIT)
#include "CCallHelpers.h"
#include "JITInlines.h"
#include "JITThunks.h"
#include "ThunkGenerators.h"
#include "VM.h"
namespace JSC {
#if ENABLE(EXTRA_CTI_THUNKS)
void JITSlowPathCall::call()
{
VM& vm = m_jit->vm();
uint32_t bytecodeOffset = m_jit->m_bytecodeIndex.offset();
ASSERT(BytecodeIndex(bytecodeOffset) == m_jit->m_bytecodeIndex);
UNUSED_VARIABLE(m_pc);
constexpr GPRReg bytecodeOffsetReg = GPRInfo::argumentGPR1;
m_jit->move(JIT::TrustedImm32(bytecodeOffset), bytecodeOffsetReg);
m_jit->emitNakedNearCall(vm.jitStubs->ctiSlowPathFunctionStub(vm, m_slowPathFunction).retaggedCode<NoPtrTag>());
}
MacroAssemblerCodeRef<JITThunkPtrTag> JITSlowPathCall::generateThunk(VM& vm, SlowPathFunction slowPathFunction)
{
CCallHelpers jit;
constexpr GPRReg bytecodeOffsetReg = JIT::argumentGPR1;
#if CPU(X86_64)
jit.push(X86Registers::ebp);
#elif CPU(ARM64)
jit.tagReturnAddress();
jit.pushPair(CCallHelpers::framePointerRegister, CCallHelpers::linkRegister);
#endif
jit.store32(bytecodeOffsetReg, CCallHelpers::tagFor(CallFrameSlot::argumentCountIncludingThis));
jit.loadPtr(CCallHelpers::addressFor(CallFrameSlot::codeBlock), GPRInfo::argumentGPR0);
jit.prepareCallOperation(vm);
jit.loadPtr(CCallHelpers::Address(GPRInfo::argumentGPR0, CodeBlock::offsetOfInstructionsRawPointer()), GPRInfo::argumentGPR0);
static_assert(JIT::argumentGPR1 == bytecodeOffsetReg);
jit.addPtr(GPRInfo::argumentGPR0, GPRInfo::argumentGPR1);
jit.move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR0);
CCallHelpers::Call call = jit.call(OperationPtrTag);
CCallHelpers::Jump exceptionCheck = jit.emitNonPatchableExceptionCheck(vm);
#if CPU(X86_64)
jit.pop(X86Registers::ebp);
#elif CPU(ARM64)
jit.popPair(CCallHelpers::framePointerRegister, CCallHelpers::linkRegister);
#endif
jit.ret();
auto handler = vm.getCTIStub(popThunkStackPreservesAndHandleExceptionGenerator);
LinkBuffer patchBuffer(jit, GLOBAL_THUNK_ID, LinkBuffer::Profile::ExtraCTIThunk);
patchBuffer.link(call, FunctionPtr<OperationPtrTag>(slowPathFunction));
patchBuffer.link(exceptionCheck, CodeLocationLabel(handler.retaggedCode<NoPtrTag>()));
return FINALIZE_CODE(patchBuffer, JITThunkPtrTag, "SlowPathCall");
}
#endif // ENABLE(EXTRA_CTI_THUNKS)
} // namespace JSC
#endif // ENABLE(JIT)
|
