mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-06 20:00:16 +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.
117 lines
4.0 KiB
C++
117 lines
4.0 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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#include "LinuxSyscalls/FileManagement.h"
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#include "LinuxSyscalls/Syscalls.h"
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#include "LinuxSyscalls/x64/Syscalls.h"
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#include "LinuxSyscalls/x64/Types.h"
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#include <FEXCore/Utils/CompilerDefs.h>
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#include <FEXCore/Utils/MathUtils.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <stdint.h>
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#include <sys/select.h>
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#include <sys/stat.h>
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#include <sys/statfs.h>
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <sys/sendfile.h>
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#include <sys/timerfd.h>
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#include <syscall.h>
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#include <time.h>
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#include <unistd.h>
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namespace FEX::HLE::x64 {
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void RegisterFD(FEX::HLE::SyscallHandler *Handler) {
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REGISTER_SYSCALL_IMPL_X64(poll, [](FEXCore::Core::CpuStateFrame *Frame, struct pollfd *fds, nfds_t nfds, int timeout) -> uint64_t {
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uint64_t Result = ::poll(fds, nfds, timeout);
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(select, [](FEXCore::Core::CpuStateFrame *Frame, int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) -> uint64_t {
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uint64_t Result = ::select(nfds, readfds, writefds, exceptfds, timeout);
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(fcntl, [](FEXCore::Core::CpuStateFrame *Frame, int fd, int cmd, uint64_t arg) -> uint64_t {
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uint64_t Result{};
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switch (cmd) {
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case F_GETFL:
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Result = ::fcntl(fd, cmd, arg);
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if (Result != -1) {
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Result = FEX::HLE::RemapToX86Flags(Result);
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}
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break;
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case F_SETFL:
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Result = ::fcntl(fd, cmd, FEX::HLE::RemapFromX86Flags(arg));
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break;
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default:
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Result = ::fcntl(fd, cmd, arg);
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break;
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}
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(futimesat, [](FEXCore::Core::CpuStateFrame *Frame, int dirfd, const char *pathname, const struct timeval times[2]) -> uint64_t {
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uint64_t Result = ::syscall(SYSCALL_DEF(futimesat), dirfd, pathname, times);
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(stat, [](FEXCore::Core::CpuStateFrame *Frame, const char *pathname, FEX::HLE::x64::guest_stat *buf) -> uint64_t {
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struct stat host_stat;
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uint64_t Result = FEX::HLE::_SyscallHandler->FM.Stat(pathname, &host_stat);
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if (Result != -1) {
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*buf = host_stat;
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}
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(fstat, [](FEXCore::Core::CpuStateFrame *Frame, int fd, FEX::HLE::x64::guest_stat *buf) -> uint64_t {
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struct stat host_stat;
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uint64_t Result = ::fstat(fd, &host_stat);
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if (Result != -1) {
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*buf = host_stat;
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}
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(lstat, [](FEXCore::Core::CpuStateFrame *Frame, const char *path, FEX::HLE::x64::guest_stat *buf) -> uint64_t {
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struct stat host_stat;
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uint64_t Result = FEX::HLE::_SyscallHandler->FM.Lstat(path, &host_stat);
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if (Result != -1) {
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*buf = host_stat;
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}
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(newfstatat, [](FEXCore::Core::CpuStateFrame *Frame, int dirfd, const char *pathname, FEX::HLE::x64::guest_stat *buf, int flag) -> uint64_t {
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struct stat host_stat;
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uint64_t Result = FEX::HLE::_SyscallHandler->FM.NewFSStatAt(dirfd, pathname, &host_stat, flag);
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if (Result != -1) {
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*buf = host_stat;
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}
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(getdents, [](FEXCore::Core::CpuStateFrame *Frame, int fd, void *dirp, uint32_t count) -> uint64_t {
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return GetDentsEmulation<false>(fd, reinterpret_cast<FEX::HLE::x64::linux_dirent*>(dirp), count);
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});
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REGISTER_SYSCALL_IMPL_X64(dup2, [](FEXCore::Core::CpuStateFrame *Frame, int oldfd, int newfd) -> uint64_t {
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uint64_t Result = ::dup2(oldfd, newfd);
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SYSCALL_ERRNO();
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});
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REGISTER_SYSCALL_IMPL_X64(statfs, [](FEXCore::Core::CpuStateFrame *Frame, const char *path, struct statfs *buf) -> uint64_t {
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uint64_t Result = FEX::HLE::_SyscallHandler->FM.Statfs(path, buf);
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SYSCALL_ERRNO();
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});
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}
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}
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