mirror of
https://github.com/FEX-Emu/FEX.git
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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-shared
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$end_info$
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*/
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#include "LinuxSyscalls/Syscalls.h"
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#include "LinuxSyscalls/x64/Syscalls.h"
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#include "LinuxSyscalls/x32/Syscalls.h"
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#include <FEXCore/Utils/LogManager.h>
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#include <cstring>
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#include <linux/kcmp.h>
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#include <linux/seccomp.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <syslog.h>
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#include <sys/random.h>
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#include <sys/resource.h>
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#include <sys/syscall.h>
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#include <sys/utsname.h>
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#include <sys/klog.h>
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#include <sys/personality.h>
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#include <sys/ptrace.h>
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#include <unistd.h>
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#include <git_version.h>
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namespace FEX::HLE {
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using cap_user_header_t = void*;
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using cap_user_data_t = void*;
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void RegisterInfo(FEX::HLE::SyscallHandler* Handler) {
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REGISTER_SYSCALL_IMPL(uname, [](FEXCore::Core::CpuStateFrame* Frame, struct utsname* buf) -> uint64_t {
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auto Thread = FEX::HLE::ThreadManager::GetStateObjectFromCPUState(Frame);
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struct utsname Local {};
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if (::uname(&Local) == 0) {
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memcpy(buf->nodename, Local.nodename, sizeof(Local.nodename));
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static_assert(sizeof(Local.nodename) <= sizeof(buf->nodename));
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memcpy(buf->domainname, Local.domainname, sizeof(Local.domainname));
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static_assert(sizeof(Local.domainname) <= sizeof(buf->domainname));
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} else {
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strcpy(buf->nodename, "FEXCore");
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LogMan::Msg::EFmt("Couldn't determine host nodename. Defaulting to '{}'", buf->nodename);
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}
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strcpy(buf->sysname, "Linux");
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uint32_t GuestVersion = FEX::HLE::_SyscallHandler->GetGuestKernelVersion();
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if (Thread->persona & UNAME26) {
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// Kernel version converts from 6.x.y to 2.6.60+x.
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GuestVersion = FEX::LinuxVersion::KernelVersion(2, 6, 60 + FEX::LinuxVersion::KernelMinor(GuestVersion));
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}
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snprintf(buf->release, sizeof(buf->release), "%d.%d.%d", FEX::LinuxVersion::KernelMajor(GuestVersion),
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FEX::LinuxVersion::KernelMinor(GuestVersion), FEX::LinuxVersion::KernelPatch(GuestVersion));
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const char version[] = "#" GIT_DESCRIBE_STRING " SMP " __DATE__ " " __TIME__;
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strcpy(buf->version, version);
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static_assert(sizeof(version) <= sizeof(buf->version), "uname version define became too large!");
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if (Thread->persona & PER_LINUX32) {
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// Tell the guest that we are a 32bit kernel
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strcpy(buf->machine, "i686");
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} else {
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// Tell the guest that we are a 64bit kernel
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strcpy(buf->machine, "x86_64");
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}
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return 0;
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});
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REGISTER_SYSCALL_IMPL(personality, [](FEXCore::Core::CpuStateFrame* Frame, uint32_t persona) -> uint64_t {
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auto Thread = FEX::HLE::ThreadManager::GetStateObjectFromCPUState(Frame);
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if (persona == ~0U) {
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// Special case, only queries the persona.
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return Thread->persona;
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}
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// Mask off `PER_LINUX32` because AArch64 doesn't support it.
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uint32_t NewPersona = persona & ~PER_LINUX32;
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// This syscall can not physically fail with PER_LINUX32 masked off.
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// It also can not fail on a real x86 kernel.
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(void)::syscall(SYSCALL_DEF(personality), NewPersona);
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// Return the old persona while setting the new one.
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auto OldPersona = Thread->persona;
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Thread->persona = persona;
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return OldPersona;
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});
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REGISTER_SYSCALL_IMPL(seccomp, [](FEXCore::Core::CpuStateFrame* Frame, unsigned int operation, unsigned int flags, void* args) -> uint64_t {
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return FEX::HLE::_SyscallHandler->SeccompEmulator.Handle(Frame, operation, flags, args);
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});
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REGISTER_SYSCALL_IMPL(
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ptrace, [](FEXCore::Core::CpuStateFrame* Frame, int /*enum __ptrace_request*/ request, pid_t pid, void* addr, void* data) -> uint64_t {
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uint64_t Result {};
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switch (request) {
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case PTRACE_PEEKTEXT:
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case PTRACE_PEEKDATA:
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case PTRACE_POKETEXT:
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case PTRACE_POKEDATA:
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case PTRACE_ATTACH:
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case PTRACE_DETACH:
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// Passthrough these requests. Allows Wine to run the Ubisoft launcher.
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Result = ::syscall(SYSCALL_DEF(ptrace), request, pid, addr, data);
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SYSCALL_ERRNO();
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default: break;
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}
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// We don't support this
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return -EPERM;
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});
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}
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} // namespace FEX::HLE
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