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https://github.com/FEX-Emu/FEX.git
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Alyssa Rosenzweig
a10f984b1c
alternative to #3638. this is theoretically better for side-by-side diffs. in practice it may make other diffs worse since all the \'s change when part of the macro change. Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
119 lines
4.4 KiB
C++
119 lines
4.4 KiB
C++
// SPDX-License-Identifier: MIT
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/*
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$info$
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tags: LinuxSyscalls|syscalls-x86-64
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$end_info$
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*/
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#pragma once
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#include "LinuxSyscalls/FileManagement.h"
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#include "LinuxSyscalls/Syscalls.h"
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#include <FEXCore/HLE/SyscallHandler.h>
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#include <FEXCore/IR/IR.h>
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#include <FEXCore/fextl/memory.h>
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#include <FEXCore/fextl/string.h>
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#include <atomic>
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#include <condition_variable>
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#include <memory>
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#include <mutex>
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namespace FEX::HLE {
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class SignalDelegator;
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class SyscallHandler;
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} // namespace FEX::HLE
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namespace FEXCore::Core {
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struct InternalThreadState;
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}
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namespace FEX::HLE::x64 {
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class x64SyscallHandler final : public FEX::HLE::SyscallHandler {
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public:
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x64SyscallHandler(FEXCore::Context::Context* ctx, FEX::HLE::SignalDelegator* _SignalDelegation);
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void* GuestMmap(FEXCore::Core::InternalThreadState* Thread, void* addr, size_t length, int prot, int flags, int fd, off_t offset) override;
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int GuestMunmap(FEXCore::Core::InternalThreadState* Thread, void* addr, uint64_t length) override;
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void RegisterSyscall_64(int SyscallNumber, int32_t HostSyscallNumber, FEXCore::IR::SyscallFlags Flags,
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#ifdef DEBUG_STRACE
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const fextl::string& TraceFormatString,
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#endif
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void* SyscallHandler, int ArgumentCount) override {
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auto& Def = Definitions.at(SyscallNumber);
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#if defined(ASSERTIONS_ENABLED) && ASSERTIONS_ENABLED
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auto cvt = [](auto in) {
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union {
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decltype(in) val;
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void* raw;
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} raw;
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raw.val = in;
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return raw.raw;
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};
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LOGMAN_THROW_A_FMT(Def.Ptr == cvt(&UnimplementedSyscall), "Oops overwriting sysall problem, {}", SyscallNumber);
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#endif
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Def.Ptr = SyscallHandler;
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Def.NumArgs = ArgumentCount;
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Def.Flags = Flags;
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Def.HostSyscallNumber = HostSyscallNumber;
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#ifdef DEBUG_STRACE
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Def.StraceFmt = TraceFormatString;
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#endif
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}
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private:
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void RegisterSyscallHandlers();
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};
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fextl::unique_ptr<FEX::HLE::SyscallHandler> CreateHandler(FEXCore::Context::Context* ctx, FEX::HLE::SignalDelegator* _SignalDelegation);
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//////
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// REGISTER_SYSCALL_IMPL implementation
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// Given a syscall name + a lambda, and it will generate an strace string, extract number of arguments
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// and register it as a syscall handler
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//////
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// RegisterSyscall base
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// Deduces return, args... from the function passed
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// Does not work with lambas, because they are objects with operator (), not functions
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template<typename R, typename... Args>
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void RegisterSyscall(SyscallHandler* Handler, int SyscallNumber, int32_t HostSyscallNumber, FEXCore::IR::SyscallFlags Flags,
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const char* Name, R (*fn)(FEXCore::Core::CpuStateFrame* Frame, Args...)) {
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#ifdef DEBUG_STRACE
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auto TraceFormatString = fextl::string(Name) + "(" + CollectArgsFmtString<Args...>() + ") = %ld";
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#endif
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Handler->RegisterSyscall_64(SyscallNumber, HostSyscallNumber, Flags,
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#ifdef DEBUG_STRACE
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TraceFormatString,
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#endif
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reinterpret_cast<void*>(fn), sizeof...(Args));
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}
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// Generic RegisterSyscall for lambdas
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// Non-capturing lambdas can be cast to function pointers, but this does not happen on argument matching
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// This is some glue logic that will cast a lambda and call the base RegisterSyscall implementation
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template<class F>
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void RegisterSyscall(SyscallHandler* _Handler, int num, int32_t HostSyscallNumber, FEXCore::IR::SyscallFlags Flags, const char* name, F f) {
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RegisterSyscall(_Handler, num, HostSyscallNumber, Flags, name, +f);
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}
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} // namespace FEX::HLE::x64
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// Registers syscall for 64bit only
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#define REGISTER_SYSCALL_IMPL_X64(name, lambda) REGISTER_SYSCALL_IMPL_X64_INTERNAL(name, ~0, FEXCore::IR::SyscallFlags::DEFAULT, lambda)
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#define REGISTER_SYSCALL_IMPL_X64_PASS(name, lambda) \
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REGISTER_SYSCALL_IMPL_X64_INTERNAL(name, SYSCALL_DEF(name), FEXCore::IR::SyscallFlags::DEFAULT, lambda)
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#define REGISTER_SYSCALL_IMPL_X64_FLAGS(name, flags, lambda) REGISTER_SYSCALL_IMPL_X64_INTERNAL(name, ~0, flags, lambda)
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#define REGISTER_SYSCALL_IMPL_X64_PASS_FLAGS(name, flags, lambda) REGISTER_SYSCALL_IMPL_X64_INTERNAL(name, SYSCALL_DEF(name), flags, lambda)
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#define REGISTER_SYSCALL_IMPL_X64_INTERNAL(name, number, flags, lambda) \
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do { \
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FEX::HLE::x64::RegisterSyscall(Handler, x64::SYSCALL_x64_##name, (number), (flags), #name, (lambda)); \
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} while (false)
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