| /* |
| * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>. |
| * Copyright (C) 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. AND ITS CONTRIBUTORS ``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 ITS 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 "GPRInfo.h" |
| #include "LLIntPCRanges.h" |
| #include "MacroAssemblerCodeRef.h" |
| #include <wtf/Optional.h> |
| #include <wtf/PlatformRegisters.h> |
| #include <wtf/PointerPreparations.h> |
| #include <wtf/StdLibExtras.h> |
| |
| namespace JSC { |
| namespace MachineContext { |
| |
| template<typename T = void*> T stackPointer(const PlatformRegisters&); |
| |
| #if OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| template<typename T = void*> void setStackPointer(PlatformRegisters&, T); |
| template<typename T = void*> T framePointer(const PlatformRegisters&); |
| template<typename T = void*> void setFramePointer(PlatformRegisters&, T); |
| inline MacroAssemblerCodePtr<PlatformRegistersLRPtrTag> linkRegister(const PlatformRegisters&); |
| inline void setLinkRegister(PlatformRegisters&, MacroAssemblerCodePtr<CFunctionPtrTag>); |
| inline Optional<MacroAssemblerCodePtr<PlatformRegistersPCPtrTag>> instructionPointer(const PlatformRegisters&); |
| inline void setInstructionPointer(PlatformRegisters&, MacroAssemblerCodePtr<CFunctionPtrTag>); |
| |
| template<size_t N> void*& argumentPointer(PlatformRegisters&); |
| template<size_t N> void* argumentPointer(const PlatformRegisters&); |
| #if !ENABLE(C_LOOP) |
| void*& llintInstructionPointer(PlatformRegisters&); |
| void* llintInstructionPointer(const PlatformRegisters&); |
| #endif // !ENABLE(C_LOOP) |
| |
| #if HAVE(MACHINE_CONTEXT) |
| |
| #if !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| #if !USE(DARWIN_REGISTER_MACROS) |
| static inline void*& stackPointerImpl(mcontext_t&); |
| static inline void*& instructionPointerImpl(mcontext_t&); |
| #endif // !USE(DARWIN_REGISTER_MACROS) |
| |
| static inline void*& framePointerImpl(mcontext_t&); |
| #endif // !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| template<typename T = void*> T stackPointer(const mcontext_t&); |
| template<typename T = void*> void setStackPointer(mcontext_t&, T); |
| template<typename T = void*> T framePointer(const mcontext_t&); |
| template<typename T = void*> void setFramePointer(mcontext_t&, T); |
| inline MacroAssemblerCodePtr<PlatformRegistersPCPtrTag> instructionPointer(const mcontext_t&); |
| inline void setInstructionPointer(mcontext_t&, MacroAssemblerCodePtr<CFunctionPtrTag>); |
| |
| template<size_t N> void*& argumentPointer(mcontext_t&); |
| template<size_t N> void* argumentPointer(const mcontext_t&); |
| #if !ENABLE(C_LOOP) |
| void*& llintInstructionPointer(mcontext_t&); |
| void* llintInstructionPointer(const mcontext_t&); |
| #endif // !ENABLE(C_LOOP) |
| #endif // HAVE(MACHINE_CONTEXT) |
| #endif // OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| #if OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| #if !USE(PLATFORM_REGISTERS_WITH_PROFILE) && !USE(DARWIN_REGISTER_MACROS) |
| static inline void*& stackPointerImpl(PlatformRegisters& regs) |
| { |
| #if OS(DARWIN) |
| #if __DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.__esp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.__rsp); |
| #elif CPU(PPC) || CPU(PPC64) |
| return reinterpret_cast<void*&>(regs.__r1); |
| #elif CPU(ARM_THUMB2) || CPU(ARM) |
| return reinterpret_cast<void*&>(regs.__sp); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else // !__DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.esp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.rsp); |
| #elif CPU(PPC) || CPU(PPC64) |
| return reinterpret_cast<void*&>(regs.r1); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #endif // __DARWIN_UNIX03 |
| |
| #elif OS(WINDOWS) |
| |
| #if CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Sp); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.IntSp); |
| #elif CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Esp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Rsp); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif HAVE(MACHINE_CONTEXT) |
| return stackPointerImpl(regs.machineContext); |
| #endif |
| } |
| #endif // !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| template<typename T> |
| inline T stackPointer(const PlatformRegisters& regs) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| void* value = WTF_READ_PLATFORM_REGISTERS_SP_WITH_PROFILE(regs); |
| assertIsNotTagged(value); |
| return bitwise_cast<T>(value); |
| #elif USE(DARWIN_REGISTER_MACROS) |
| return bitwise_cast<T>(reinterpret_cast<void*>(__darwin_arm_thread_state64_get_sp(regs))); |
| #else |
| return bitwise_cast<T>(stackPointerImpl(const_cast<PlatformRegisters&>(regs))); |
| #endif |
| } |
| |
| template<typename T> |
| inline void setStackPointer(PlatformRegisters& regs, T value) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| assertIsNotTagged(bitwise_cast<void*>(value)); |
| WTF_WRITE_PLATFORM_REGISTERS_SP_WITH_PROFILE(regs, bitwise_cast<void*>(value)); |
| #elif USE(DARWIN_REGISTER_MACROS) |
| __darwin_arm_thread_state64_set_sp(regs, value); |
| #else |
| stackPointerImpl(regs) = bitwise_cast<void*>(value); |
| #endif |
| } |
| |
| #else // not OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| template<typename T> |
| inline T stackPointer(const PlatformRegisters& regs) |
| { |
| return bitwise_cast<T>(regs.stackPointer); |
| } |
| #endif // OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| #if HAVE(MACHINE_CONTEXT) |
| |
| #if !USE(PLATFORM_REGISTERS_WITH_PROFILE) && !USE(DARWIN_REGISTER_MACROS) |
| static inline void*& stackPointerImpl(mcontext_t& machineContext) |
| { |
| #if OS(DARWIN) |
| return stackPointerImpl(machineContext->__ss); |
| #elif OS(FREEBSD) |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_esp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_rsp); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.__gregs[_REG_SP]); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_gpregs.gp_sp); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_regs[29]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__) |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_ESP]); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_RSP]); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.arm_sp); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.sp); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[29]); |
| #else |
| #error Unknown Architecture |
| #endif |
| #endif |
| } |
| #endif // !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| template<typename T> |
| inline T stackPointer(const mcontext_t& machineContext) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| void* value = WTF_READ_MACHINE_CONTEXT_SP_WITH_PROFILE(machineContext); |
| assertIsNotTagged(value); |
| return bitwise_cast<T>(value); |
| #elif USE(DARWIN_REGISTER_MACROS) |
| return stackPointer(machineContext->__ss); |
| #else |
| return bitwise_cast<T>(stackPointerImpl(const_cast<mcontext_t&>(machineContext))); |
| #endif |
| } |
| |
| template<typename T> |
| inline void setStackPointer(mcontext_t& machineContext, T value) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| assertIsNotTagged(bitwise_cast<void*>(value)); |
| WTF_WRITE_MACHINE_CONTEXT_SP_WITH_PROFILE(machineContext, bitwise_cast<void*>(value)); |
| #elif USE(DARWIN_REGISTER_MACROS) |
| return setStackPointer(machineContext->__ss, value); |
| #else |
| stackPointerImpl(machineContext) = bitwise_cast<void*>(value); |
| #endif |
| } |
| #endif // HAVE(MACHINE_CONTEXT) |
| |
| |
| #if OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| #if !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| static inline void*& framePointerImpl(PlatformRegisters& regs) |
| { |
| #if OS(DARWIN) |
| |
| #if __DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.__ebp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.__rbp); |
| #elif CPU(ARM_THUMB2) |
| return reinterpret_cast<void*&>(regs.__r[7]); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>(regs.__r[11]); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>(regs.__x[29]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else // !__DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.esp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.rsp); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #endif // __DARWIN_UNIX03 |
| |
| #elif OS(WINDOWS) |
| |
| #if CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.R11); |
| #elif CPU(MIPS) |
| #error Dont know what to do with mips. Do we even need this? |
| #elif CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Ebp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Rbp); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif HAVE(MACHINE_CONTEXT) |
| return framePointerImpl(regs.machineContext); |
| #endif |
| } |
| #endif // !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| template<typename T> |
| inline T framePointer(const PlatformRegisters& regs) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| void* value = WTF_READ_PLATFORM_REGISTERS_FP_WITH_PROFILE(regs); |
| assertIsNotTagged(value); |
| return bitwise_cast<T>(value); |
| #else |
| return bitwise_cast<T>(framePointerImpl(const_cast<PlatformRegisters&>(regs))); |
| #endif |
| } |
| |
| template<typename T> |
| inline void setFramePointer(PlatformRegisters& regs, T value) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| assertIsNotTagged(bitwise_cast<void*>(value)); |
| WTF_WRITE_PLATFORM_REGISTERS_FP_WITH_PROFILE(regs, bitwise_cast<void*>(value)); |
| #else |
| framePointerImpl(regs) = bitwise_cast<void*>(value); |
| #endif |
| } |
| #endif // OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| |
| #if HAVE(MACHINE_CONTEXT) |
| |
| #if !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| static inline void*& framePointerImpl(mcontext_t& machineContext) |
| { |
| #if OS(DARWIN) |
| return framePointerImpl(machineContext->__ss); |
| #elif OS(FREEBSD) |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_ebp); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_rbp); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.__gregs[_REG_FP]); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_gpregs.gp_x[29]); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_regs[30]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__) |
| |
| // The following sequence depends on glibc's sys/ucontext.h. |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_EBP]); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_RBP]); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.arm_fp); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.regs[29]); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[30]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else |
| #error Need a way to get the frame pointer for another thread on this platform |
| #endif |
| } |
| #endif // !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| template<typename T> |
| inline T framePointer(const mcontext_t& machineContext) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| void* value = WTF_READ_MACHINE_CONTEXT_FP_WITH_PROFILE(machineContext); |
| assertIsNotTagged(value); |
| return bitwise_cast<T>(value); |
| #else |
| return bitwise_cast<T>(framePointerImpl(const_cast<mcontext_t&>(machineContext))); |
| #endif |
| } |
| |
| template<typename T> |
| inline void setFramePointer(mcontext_t& machineContext, T value) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| assertIsNotTagged(bitwise_cast<void*>(value)); |
| WTF_WRITE_MACHINE_CONTEXT_FP_WITH_PROFILE(machineContext, bitwise_cast<void*>(value)); |
| #else |
| framePointerImpl(machineContext) = bitwise_cast<void*>(value); |
| #endif |
| } |
| #endif // HAVE(MACHINE_CONTEXT) |
| |
| |
| #if OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| #if !USE(PLATFORM_REGISTERS_WITH_PROFILE) && !USE(DARWIN_REGISTER_MACROS) |
| static inline void*& instructionPointerImpl(PlatformRegisters& regs) |
| { |
| #if OS(DARWIN) |
| #if __DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.__eip); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.__rip); |
| #elif CPU(ARM_THUMB2) || CPU(ARM) |
| return reinterpret_cast<void*&>(regs.__pc); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else // !__DARWIN_UNIX03 |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.eip); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.rip); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #endif // __DARWIN_UNIX03 |
| |
| #elif OS(WINDOWS) |
| |
| #if CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Pc); |
| #elif CPU(MIPS) |
| #error Dont know what to do with mips. Do we even need this? |
| #elif CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Eip); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Rip); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif HAVE(MACHINE_CONTEXT) |
| return instructionPointerImpl(regs.machineContext); |
| #endif |
| } |
| #endif // !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| inline Optional<MacroAssemblerCodePtr<PlatformRegistersPCPtrTag>> instructionPointer(const PlatformRegisters& regs) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| void* value = WTF_READ_PLATFORM_REGISTERS_PC_WITH_PROFILE(regs); |
| #elif USE(DARWIN_REGISTER_MACROS) |
| void* value = __darwin_arm_thread_state64_get_pc_fptr(regs); |
| #else |
| void* value = instructionPointerImpl(const_cast<PlatformRegisters&>(regs)); |
| #endif |
| if (!value) |
| return makeOptional(MacroAssemblerCodePtr<PlatformRegistersPCPtrTag>(nullptr)); |
| if (!usesPointerTagging()) |
| return makeOptional(MacroAssemblerCodePtr<PlatformRegistersPCPtrTag>(value)); |
| if (isTaggedWith(value, PlatformRegistersPCPtrTag)) |
| return makeOptional(MacroAssemblerCodePtr<PlatformRegistersPCPtrTag>(value)); |
| return WTF::nullopt; |
| } |
| |
| inline void setInstructionPointer(PlatformRegisters& regs, MacroAssemblerCodePtr<CFunctionPtrTag> value) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| WTF_WRITE_PLATFORM_REGISTERS_PC_WITH_PROFILE(regs, value.executableAddress()); |
| #elif USE(DARWIN_REGISTER_MACROS) |
| __darwin_arm_thread_state64_set_pc_fptr(regs, value.executableAddress()); |
| #else |
| instructionPointerImpl(regs) = value.executableAddress(); |
| #endif |
| } |
| #endif // OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| |
| #if HAVE(MACHINE_CONTEXT) |
| |
| #if !USE(PLATFORM_REGISTERS_WITH_PROFILE) && !USE(DARWIN_REGISTER_MACROS) |
| static inline void*& instructionPointerImpl(mcontext_t& machineContext) |
| { |
| #if OS(DARWIN) |
| return instructionPointerImpl(machineContext->__ss); |
| #elif OS(FREEBSD) |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_eip); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_rip); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.__gregs[_REG_PC]); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_gpregs.gp_elr); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_pc); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__) |
| |
| // The following sequence depends on glibc's sys/ucontext.h. |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_EIP]); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_RIP]); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.arm_pc); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.pc); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.pc); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else |
| #error Need a way to get the instruction pointer for another thread on this platform |
| #endif |
| } |
| #endif // !USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| |
| inline MacroAssemblerCodePtr<PlatformRegistersPCPtrTag> instructionPointer(const mcontext_t& machineContext) |
| { |
| #if USE(DARWIN_REGISTER_MACROS) |
| return *instructionPointer(machineContext->__ss); |
| #else |
| |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| void* value = WTF_READ_MACHINE_CONTEXT_PC_WITH_PROFILE(machineContext); |
| #else |
| void* value = instructionPointerImpl(const_cast<mcontext_t&>(machineContext)); |
| #endif |
| |
| return MacroAssemblerCodePtr<PlatformRegistersPCPtrTag>(value); |
| #endif |
| } |
| |
| inline void setInstructionPointer(mcontext_t& machineContext, MacroAssemblerCodePtr<CFunctionPtrTag> value) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| WTF_WRITE_MACHINE_CONTEXT_PC_WITH_PROFILE(machineContext, value.executableAddress()); |
| #elif USE(DARWIN_REGISTER_MACROS) |
| setInstructionPointer(machineContext->__ss, value); |
| #else |
| instructionPointerImpl(machineContext) = value.executableAddress(); |
| #endif |
| } |
| #endif // HAVE(MACHINE_CONTEXT) |
| |
| |
| #if OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| #if OS(DARWIN) && __DARWIN_UNIX03 && CPU(ARM64) |
| |
| inline MacroAssemblerCodePtr<PlatformRegistersLRPtrTag> linkRegister(const PlatformRegisters& regs) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| void* value = WTF_READ_PLATFORM_REGISTERS_LR_WITH_PROFILE(regs); |
| #else |
| void* value = __darwin_arm_thread_state64_get_lr_fptr(regs); |
| #endif |
| return MacroAssemblerCodePtr<PlatformRegistersLRPtrTag>(value); |
| } |
| |
| inline void setLinkRegister(PlatformRegisters& regs, MacroAssemblerCodePtr<CFunctionPtrTag> value) |
| { |
| #if USE(PLATFORM_REGISTERS_WITH_PROFILE) |
| WTF_WRITE_PLATFORM_REGISTERS_PC_WITH_PROFILE(regs, value.executableAddress()); |
| #else |
| __darwin_arm_thread_state64_set_lr_fptr(regs, value.executableAddress()); |
| #endif |
| } |
| #endif // OS(DARWIN) && __DARWIN_UNIX03 && CPU(ARM64) |
| |
| #if HAVE(MACHINE_CONTEXT) |
| template<> void*& argumentPointer<1>(mcontext_t&); |
| #endif |
| |
| template<> |
| inline void*& argumentPointer<1>(PlatformRegisters& regs) |
| { |
| #if OS(DARWIN) |
| #if __DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.__edx); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.__rsi); |
| #elif CPU(ARM_THUMB2) || CPU(ARM) |
| return reinterpret_cast<void*&>(regs.__r[1]); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>(regs.__x[1]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else // !__DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>(regs.edx); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>(regs.rsi); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #endif // __DARWIN_UNIX03 |
| |
| #elif OS(WINDOWS) |
| |
| #if CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.R1); |
| #elif CPU(MIPS) |
| #error Dont know what to do with mips. Do we even need this? |
| #elif CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Edx); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Rdx); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif HAVE(MACHINE_CONTEXT) |
| return argumentPointer<1>(regs.machineContext); |
| #endif |
| } |
| |
| template<size_t N> |
| inline void* argumentPointer(const PlatformRegisters& regs) |
| { |
| return argumentPointer<N>(const_cast<PlatformRegisters&>(regs)); |
| } |
| #endif // OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| #if HAVE(MACHINE_CONTEXT) |
| template<> |
| inline void*& argumentPointer<1>(mcontext_t& machineContext) |
| { |
| #if OS(DARWIN) |
| return argumentPointer<1>(machineContext->__ss); |
| #elif OS(FREEBSD) |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_edx); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_rsi); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.__gregs[_REG_R1]); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_gpregs.gp_x[1]); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_regs[5]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__) |
| |
| // The following sequence depends on glibc's sys/ucontext.h. |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_EDX]); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_RSI]); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.arm_r1); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.regs[1]); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[5]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else |
| #error Need a way to get the frame pointer for another thread on this platform |
| #endif |
| } |
| |
| template<unsigned N> |
| inline void* argumentPointer(const mcontext_t& machineContext) |
| { |
| return argumentPointer<N>(const_cast<mcontext_t&>(machineContext)); |
| } |
| #endif // HAVE(MACHINE_CONTEXT) |
| |
| #if !ENABLE(C_LOOP) |
| #if OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| inline void*& llintInstructionPointer(PlatformRegisters& regs) |
| { |
| // LLInt uses regT4 as PC. |
| #if OS(DARWIN) |
| #if __DARWIN_UNIX03 |
| |
| #if CPU(X86) |
| static_assert(LLInt::LLIntPC == X86Registers::esi, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>(regs.__esi); |
| #elif CPU(X86_64) |
| static_assert(LLInt::LLIntPC == X86Registers::r8, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>(regs.__r8); |
| #elif CPU(ARM) |
| static_assert(LLInt::LLIntPC == ARMRegisters::r8, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>(regs.__r[8]); |
| #elif CPU(ARM64) |
| static_assert(LLInt::LLIntPC == ARM64Registers::x4, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>(regs.__x[4]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else // !__DARWIN_UNIX03 |
| #if CPU(X86) |
| static_assert(LLInt::LLIntPC == X86Registers::esi, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>(regs.esi); |
| #elif CPU(X86_64) |
| static_assert(LLInt::LLIntPC == X86Registers::r8, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>(regs.r8); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #endif // __DARWIN_UNIX03 |
| |
| #elif OS(WINDOWS) |
| |
| #if CPU(ARM) |
| static_assert(LLInt::LLIntPC == ARMRegisters::r8, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>((uintptr_t&) regs.R8); |
| #elif CPU(MIPS) |
| #error Dont know what to do with mips. Do we even need this? |
| #elif CPU(X86) |
| static_assert(LLInt::LLIntPC == X86Registers::esi, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>((uintptr_t&) regs.Esi); |
| #elif CPU(X86_64) |
| static_assert(LLInt::LLIntPC == X86Registers::r10, "Wrong LLInt PC."); |
| return reinterpret_cast<void*&>((uintptr_t&) regs.R10); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif HAVE(MACHINE_CONTEXT) |
| return llintInstructionPointer(regs.machineContext); |
| #endif |
| } |
| |
| inline void* llintInstructionPointer(const PlatformRegisters& regs) |
| { |
| return llintInstructionPointer(const_cast<PlatformRegisters&>(regs)); |
| } |
| #endif // OS(WINDOWS) || HAVE(MACHINE_CONTEXT) |
| |
| |
| #if HAVE(MACHINE_CONTEXT) |
| inline void*& llintInstructionPointer(mcontext_t& machineContext) |
| { |
| // LLInt uses regT4 as PC. |
| #if OS(DARWIN) |
| return llintInstructionPointer(machineContext->__ss); |
| #elif OS(FREEBSD) |
| |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_esi); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_r8); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.__gregs[_REG_R8]); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_gpregs.gp_x[4]); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.mc_regs[12]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #elif OS(FUCHSIA) || defined(__GLIBC__) || defined(__BIONIC__) |
| |
| // The following sequence depends on glibc's sys/ucontext.h. |
| #if CPU(X86) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_ESI]); |
| #elif CPU(X86_64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[REG_R8]); |
| #elif CPU(ARM) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.arm_r8); |
| #elif CPU(ARM64) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.regs[4]); |
| #elif CPU(MIPS) |
| return reinterpret_cast<void*&>((uintptr_t&) machineContext.gregs[12]); |
| #else |
| #error Unknown Architecture |
| #endif |
| |
| #else |
| #error Need a way to get the LLIntPC for another thread on this platform |
| #endif |
| } |
| |
| inline void* llintInstructionPointer(const mcontext_t& machineContext) |
| { |
| return llintInstructionPointer(const_cast<mcontext_t&>(machineContext)); |
| } |
| #endif // HAVE(MACHINE_CONTEXT) |
| #endif // !ENABLE(C_LOOP) |
| |
| } |
| } |
