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/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
* Copyright (C) 2019-2022 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 GOOGLE, 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 <wtf/Platform.h>
#include <wtf/StdLibExtras.h>
#if OS(DARWIN)
#include <mach/exception_types.h>
#include <mach/thread_act.h>
#include <signal.h>
#elif OS(WINDOWS)
#include <windows.h>
#elif OS(OPENBSD)
typedef ucontext_t mcontext_t;
#elif OS(QNX)
#include <ucontext.h>
#else
#include <sys/ucontext.h>
#endif
namespace WTF {
#if OS(DARWIN)
#if CPU(X86)
typedef i386_thread_state_t PlatformRegisters;
#elif CPU(X86_64)
typedef x86_thread_state64_t PlatformRegisters;
#elif CPU(PPC)
typedef ppc_thread_state_t PlatformRegisters;
#elif CPU(PPC64)
typedef ppc_thread_state64_t PlatformRegisters;
#elif CPU(ARM)
typedef arm_thread_state_t PlatformRegisters;
#elif CPU(ARM64)
typedef arm_thread_state64_t PlatformRegisters;
#else
#error Unknown Architecture
#endif
inline PlatformRegisters& registersFromUContext(ucontext_t* ucontext)
{
return ucontext->uc_mcontext->__ss;
}
#elif OS(WINDOWS)
using PlatformRegisters = CONTEXT;
#elif HAVE(MACHINE_CONTEXT)
struct PlatformRegisters {
mcontext_t machineContext;
};
inline PlatformRegisters& registersFromUContext(ucontext_t* ucontext)
{
#if OS(OPENBSD)
return *std::bit_cast<PlatformRegisters*>(ucontext);
#elif CPU(PPC)
return *std::bit_cast<PlatformRegisters*>(ucontext->uc_mcontext.uc_regs);
#else
return *std::bit_cast<PlatformRegisters*>(&ucontext->uc_mcontext);
#endif
}
#else
struct PlatformRegisters {
void* stackPointer;
};
#endif
} // namespace WTF
#if USE(PLATFORM_REGISTERS_WITH_PROFILE)
#if CPU(ARM64E)
namespace WTF {
extern void* threadStateLRInternal(PlatformRegisters&);
extern void* threadStatePCInternal(PlatformRegisters&);
} // namespace WTF
using WTF::threadStateLRInternal;
using WTF::threadStatePCInternal;
#else // not CPU(ARM64E)
#define threadStateLRInternal(regs) std::bit_cast<void*>(arm_thread_state64_get_lr(regs))
#define threadStatePCInternal(regs) std::bit_cast<void*>(arm_thread_state64_get_pc(regs))
#endif // CPU(ARM64E)
#define WTF_READ_PLATFORM_REGISTERS_SP_WITH_PROFILE(regs) \
reinterpret_cast<void*>(arm_thread_state64_get_sp(const_cast<PlatformRegisters&>(regs)))
#define WTF_READ_PLATFORM_REGISTERS_FP_WITH_PROFILE(regs) \
reinterpret_cast<void*>(arm_thread_state64_get_fp(const_cast<PlatformRegisters&>(regs)))
#define WTF_READ_PLATFORM_REGISTERS_LR_WITH_PROFILE(regs) \
threadStateLRInternal(const_cast<PlatformRegisters&>(regs))
#define WTF_READ_PLATFORM_REGISTERS_PC_WITH_PROFILE(regs) \
threadStatePCInternal(const_cast<PlatformRegisters&>(regs))
#if CPU(ARM64) && HAVE(HARDENED_MACH_EXCEPTIONS)
#define WTF_WRITE_PLATFORM_REGISTERS_PC_WITH_PROFILE(regs, newPointer) \
arm_thread_state64_set_pc_presigned_fptr(regs, newPointer)
#else
#define WTF_WRITE_PLATFORM_REGISTERS_PC_WITH_PROFILE(regs, newPointer) \
arm_thread_state64_set_pc_fptr(regs, newPointer)
#endif // CPU(ARM64) && HAVE(HARDENED_MACH_EXCEPTIONS)
#define WTF_READ_MACHINE_CONTEXT_SP_WITH_PROFILE(machineContext) \
WTF_READ_PLATFORM_REGISTERS_SP_WITH_PROFILE(machineContext->__ss)
#define WTF_READ_MACHINE_CONTEXT_FP_WITH_PROFILE(machineContext) \
WTF_READ_PLATFORM_REGISTERS_FP_WITH_PROFILE(machineContext->__ss)
#define WTF_READ_MACHINE_CONTEXT_PC_WITH_PROFILE(machineContext) \
WTF_READ_PLATFORM_REGISTERS_PC_WITH_PROFILE(machineContext->__ss)
#endif // USE(PLATFORM_REGISTERS_WITH_PROFILE)
using WTF::PlatformRegisters;
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