| /* |
| * Copyright (C) 2011-2018 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. |
| */ |
| |
| #include "config.h" |
| #include "DFGThunks.h" |
| |
| #if ENABLE(DFG_JIT) |
| |
| #include "CCallHelpers.h" |
| #include "DFGJITCode.h" |
| #include "DFGOSRExit.h" |
| #include "FPRInfo.h" |
| #include "GPRInfo.h" |
| #include "LinkBuffer.h" |
| #include "MacroAssembler.h" |
| #include "JSCInlines.h" |
| #include "DFGOSRExitCompilerCommon.h" |
| |
| namespace JSC { namespace DFG { |
| |
| MacroAssemblerCodeRef osrExitThunkGenerator(VM* vm) |
| { |
| MacroAssembler jit; |
| jit.probe(OSRExit::executeOSRExit, vm); |
| LinkBuffer patchBuffer(jit, GLOBAL_THUNK_ID); |
| return FINALIZE_CODE(patchBuffer, NoPtrTag, "DFG OSR exit thunk"); |
| } |
| |
| MacroAssemblerCodeRef osrExitGenerationThunkGenerator(VM* vm) |
| { |
| MacroAssembler jit; |
| |
| // This needs to happen before we use the scratch buffer because this function also uses the scratch buffer. |
| adjustFrameAndStackInOSRExitCompilerThunk<DFG::JITCode>(jit, vm, JITCode::DFGJIT); |
| |
| size_t scratchSize = sizeof(EncodedJSValue) * (GPRInfo::numberOfRegisters + FPRInfo::numberOfRegisters); |
| ScratchBuffer* scratchBuffer = vm->scratchBufferForSize(scratchSize); |
| EncodedJSValue* buffer = static_cast<EncodedJSValue*>(scratchBuffer->dataBuffer()); |
| |
| for (unsigned i = 0; i < GPRInfo::numberOfRegisters; ++i) { |
| #if USE(JSVALUE64) |
| jit.store64(GPRInfo::toRegister(i), buffer + i); |
| #else |
| jit.store32(GPRInfo::toRegister(i), buffer + i); |
| #endif |
| } |
| for (unsigned i = 0; i < FPRInfo::numberOfRegisters; ++i) { |
| jit.move(MacroAssembler::TrustedImmPtr(buffer + GPRInfo::numberOfRegisters + i), GPRInfo::regT0); |
| jit.storeDouble(FPRInfo::toRegister(i), MacroAssembler::Address(GPRInfo::regT0)); |
| } |
| |
| // Tell GC mark phase how much of the scratch buffer is active during call. |
| jit.move(MacroAssembler::TrustedImmPtr(scratchBuffer->addressOfActiveLength()), GPRInfo::regT0); |
| jit.storePtr(MacroAssembler::TrustedImmPtr(scratchSize), MacroAssembler::Address(GPRInfo::regT0)); |
| |
| // Set up one argument. |
| #if CPU(X86) |
| jit.poke(GPRInfo::callFrameRegister, 0); |
| #else |
| jit.move(GPRInfo::callFrameRegister, GPRInfo::argumentGPR0); |
| #endif |
| |
| MacroAssembler::Call functionCall = jit.call(NoPtrTag); |
| |
| jit.move(MacroAssembler::TrustedImmPtr(scratchBuffer->addressOfActiveLength()), GPRInfo::regT0); |
| jit.storePtr(MacroAssembler::TrustedImmPtr(nullptr), MacroAssembler::Address(GPRInfo::regT0)); |
| |
| for (unsigned i = 0; i < FPRInfo::numberOfRegisters; ++i) { |
| jit.move(MacroAssembler::TrustedImmPtr(buffer + GPRInfo::numberOfRegisters + i), GPRInfo::regT0); |
| jit.loadDouble(MacroAssembler::Address(GPRInfo::regT0), FPRInfo::toRegister(i)); |
| } |
| for (unsigned i = 0; i < GPRInfo::numberOfRegisters; ++i) { |
| #if USE(JSVALUE64) |
| jit.load64(buffer + i, GPRInfo::toRegister(i)); |
| #else |
| jit.load32(buffer + i, GPRInfo::toRegister(i)); |
| #endif |
| } |
| |
| jit.jump(MacroAssembler::AbsoluteAddress(&vm->osrExitJumpDestination), NoPtrTag); |
| |
| LinkBuffer patchBuffer(jit, GLOBAL_THUNK_ID); |
| |
| patchBuffer.link(functionCall, OSRExit::compileOSRExit, NoPtrTag); |
| |
| return FINALIZE_CODE(patchBuffer, NoPtrTag, "DFG OSR exit generation thunk"); |
| } |
| |
| MacroAssemblerCodeRef osrEntryThunkGenerator(VM* vm) |
| { |
| AssemblyHelpers jit(nullptr); |
| |
| // We get passed the address of a scratch buffer. The first 8-byte slot of the buffer |
| // is the frame size. The second 8-byte slot is the pointer to where we are supposed to |
| // jump. The remaining bytes are the new call frame header followed by the locals. |
| |
| ptrdiff_t offsetOfFrameSize = 0; // This is the DFG frame count. |
| ptrdiff_t offsetOfTargetPC = offsetOfFrameSize + sizeof(EncodedJSValue); |
| ptrdiff_t offsetOfPayload = offsetOfTargetPC + sizeof(EncodedJSValue); |
| ptrdiff_t offsetOfLocals = offsetOfPayload + sizeof(Register) * CallFrame::headerSizeInRegisters; |
| |
| jit.move(GPRInfo::returnValueGPR2, GPRInfo::regT0); |
| jit.loadPtr(MacroAssembler::Address(GPRInfo::regT0, offsetOfFrameSize), GPRInfo::regT1); // Load the frame size. |
| jit.negPtr(GPRInfo::regT1, GPRInfo::regT2); |
| jit.getEffectiveAddress(MacroAssembler::BaseIndex(GPRInfo::callFrameRegister, GPRInfo::regT2, MacroAssembler::TimesEight), MacroAssembler::stackPointerRegister); |
| |
| MacroAssembler::Label loop = jit.label(); |
| jit.subPtr(MacroAssembler::TrustedImm32(1), GPRInfo::regT1); |
| jit.negPtr(GPRInfo::regT1, GPRInfo::regT4); |
| jit.load32(MacroAssembler::BaseIndex(GPRInfo::regT0, GPRInfo::regT1, MacroAssembler::TimesEight, offsetOfLocals), GPRInfo::regT2); |
| jit.load32(MacroAssembler::BaseIndex(GPRInfo::regT0, GPRInfo::regT1, MacroAssembler::TimesEight, offsetOfLocals + sizeof(int32_t)), GPRInfo::regT3); |
| jit.store32(GPRInfo::regT2, MacroAssembler::BaseIndex(GPRInfo::callFrameRegister, GPRInfo::regT4, MacroAssembler::TimesEight, -static_cast<intptr_t>(sizeof(Register)))); |
| jit.store32(GPRInfo::regT3, MacroAssembler::BaseIndex(GPRInfo::callFrameRegister, GPRInfo::regT4, MacroAssembler::TimesEight, -static_cast<intptr_t>(sizeof(Register)) + static_cast<intptr_t>(sizeof(int32_t)))); |
| jit.branchPtr(MacroAssembler::NotEqual, GPRInfo::regT1, MacroAssembler::TrustedImmPtr(bitwise_cast<void*>(-static_cast<intptr_t>(CallFrame::headerSizeInRegisters)))).linkTo(loop, &jit); |
| |
| jit.loadPtr(MacroAssembler::Address(GPRInfo::regT0, offsetOfTargetPC), GPRInfo::regT1); |
| MacroAssembler::Jump ok = jit.branchPtr(MacroAssembler::Above, GPRInfo::regT1, MacroAssembler::TrustedImmPtr(bitwise_cast<void*>(static_cast<intptr_t>(1000)))); |
| jit.abortWithReason(DFGUnreasonableOSREntryJumpDestination); |
| |
| ok.link(&jit); |
| jit.restoreCalleeSavesFromEntryFrameCalleeSavesBuffer(vm->topEntryFrame); |
| jit.emitMaterializeTagCheckRegisters(); |
| |
| jit.jump(GPRInfo::regT1, NoPtrTag); |
| |
| LinkBuffer patchBuffer(jit, GLOBAL_THUNK_ID); |
| return FINALIZE_CODE(patchBuffer, NoPtrTag, "DFG OSR entry thunk"); |
| } |
| |
| } } // namespace JSC::DFG |
| |
| #endif // ENABLE(DFG_JIT) |