mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-07 23:00:19 +02:00
Ryan Houdek
151e2279af
Reimagining of #3355 without any json generators or new concepts. Fixes some mislabeling of system calls. Some getting inlined when they shouldn't be, a lot not getting inlined when they can be. This really cleans up the syscall implementation, all syscalls that can be passthrough implementations require a very small two line declaration. Additionally cleans up a bit of implementation cruft where some passthrough syscalls were using the glibc syscall handler, and some were using the glibc implementation. We have had multiple issues in the past where the glibc implementation does something subtly different than the raw syscall and breaks things. Now all passthrough handlers do a system call directly, removing at least one indirection and some ambiguity. This makes it significantly easier to add new passthrough syscalls as well. Only need to do a version check and add the three lines per syscall. Which there are new syscalls incoming that we will want to add. Tangible improvements: - Syscalls are lower overhead than ever. - When I'm adding more syscalls I have less chance of mucking it up.
113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
// SPDX-License-Identifier: MIT
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/*
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$info$
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tags: LinuxSyscalls|syscalls-x86-32
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$end_info$
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*/
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#include "LinuxSyscalls/Syscalls.h"
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#include "LinuxSyscalls/x32/IoctlEmulation.h"
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#include "LinuxSyscalls/x32/Syscalls.h"
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#include "LinuxSyscalls/x32/SyscallsEnum.h"
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#include <FEXCore/HLE/SyscallHandler.h>
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#include <FEXCore/Utils/LogManager.h>
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#include <FEXCore/fextl/memory.h>
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#include <bitset>
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#include <cerrno>
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#include <cstdint>
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#include <limits>
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#include <mutex>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <utility>
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namespace FEX::HLE::x32 {
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void RegisterEpoll(FEX::HLE::SyscallHandler *Handler);
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void RegisterFD(FEX::HLE::SyscallHandler *Handler);
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void RegisterFS(FEX::HLE::SyscallHandler *Handler);
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void RegisterInfo(FEX::HLE::SyscallHandler *Handler);
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void RegisterIO(FEX::HLE::SyscallHandler *Handler);
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void RegisterMemory(FEX::HLE::SyscallHandler *Handler);
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void RegisterMsg(FEX::HLE::SyscallHandler *Handler);
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void RegisterNotImplemented(FEX::HLE::SyscallHandler *Handler);
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void RegisterSched(FEX::HLE::SyscallHandler *Handler);
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void RegisterSemaphore(FEX::HLE::SyscallHandler *Handler);
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void RegisterSignals(FEX::HLE::SyscallHandler *Handler);
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void RegisterSocket(FEX::HLE::SyscallHandler *Handler);
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void RegisterStubs(FEX::HLE::SyscallHandler *Handler);
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void RegisterThread(FEX::HLE::SyscallHandler *Handler);
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void RegisterTime(FEX::HLE::SyscallHandler *Handler);
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void RegisterTimer(FEX::HLE::SyscallHandler *Handler);
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void RegisterPassthrough(FEX::HLE::SyscallHandler *Handler);
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x32SyscallHandler::x32SyscallHandler(FEXCore::Context::Context *ctx, FEX::HLE::SignalDelegator *_SignalDelegation, fextl::unique_ptr<MemAllocator> Allocator)
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: SyscallHandler{ctx, _SignalDelegation}, AllocHandler{std::move(Allocator)} {
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OSABI = FEXCore::HLE::SyscallOSABI::OS_LINUX32;
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RegisterSyscallHandlers();
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}
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void x32SyscallHandler::RegisterSyscallHandlers() {
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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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Definitions.resize(FEX::HLE::x32::SYSCALL_x86_MAX, SyscallFunctionDefinition {
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.NumArgs = 255,
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.Ptr = cvt(&UnimplementedSyscall),
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});
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FEX::HLE::RegisterEpoll(this);
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FEX::HLE::RegisterFD(this);
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FEX::HLE::RegisterFS(this);
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FEX::HLE::RegisterInfo(this);
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FEX::HLE::RegisterIO(this);
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FEX::HLE::RegisterMemory(this);
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FEX::HLE::RegisterSignals(this);
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FEX::HLE::RegisterThread(this);
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FEX::HLE::RegisterTimer(this);
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FEX::HLE::RegisterNotImplemented(this);
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FEX::HLE::RegisterStubs(this);
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// 32bit specific
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FEX::HLE::x32::RegisterEpoll(this);
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FEX::HLE::x32::RegisterFD(this);
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FEX::HLE::x32::RegisterFS(this);
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FEX::HLE::x32::RegisterInfo(this);
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FEX::HLE::x32::RegisterIO(this);
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FEX::HLE::x32::RegisterMemory(this);
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FEX::HLE::x32::RegisterMsg(this);
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FEX::HLE::x32::RegisterNotImplemented(this);
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FEX::HLE::x32::RegisterSched(this);
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FEX::HLE::x32::RegisterSemaphore(this);
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FEX::HLE::x32::RegisterSignals(this);
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FEX::HLE::x32::RegisterSocket(this);
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FEX::HLE::x32::RegisterStubs(this);
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FEX::HLE::x32::RegisterThread(this);
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FEX::HLE::x32::RegisterTime(this);
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FEX::HLE::x32::RegisterTimer(this);
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FEX::HLE::x32::RegisterPassthrough(this);
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FEX::HLE::x32::InitializeStaticIoctlHandlers();
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#if PRINT_MISSING_SYSCALLS
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for (auto &Syscall: SyscallNames) {
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if (Definitions[Syscall.first].Ptr == cvt(&UnimplementedSyscall)) {
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LogMan::Msg::DFmt("Unimplemented syscall: {}: {}", Syscall.first, Syscall.second);
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}
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}
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#endif
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}
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fextl::unique_ptr<FEX::HLE::SyscallHandler> CreateHandler(FEXCore::Context::Context *ctx, FEX::HLE::SignalDelegator *_SignalDelegation, fextl::unique_ptr<MemAllocator> Allocator) {
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return fextl::make_unique<x32SyscallHandler>(ctx, _SignalDelegation, std::move(Allocator));
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}
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}
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