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255 lines (217 loc) · 6.44 KB
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#include <stdafx.h>
#ifdef __ANDROID__
#include <unistd.h>
#include <os/android/perf_android.h>
#endif
#include "guest_thread.h"
#include <kernel/memory.h>
#include <kernel/heap.h>
#include <kernel/function.h>
#include "ppc_context.h"
constexpr size_t PCR_SIZE = 0xAB0;
constexpr size_t TLS_SIZE = 0x100;
constexpr size_t TEB_SIZE = 0x2E0;
constexpr size_t STACK_SIZE = 0x40000;
constexpr size_t TOTAL_SIZE = PCR_SIZE + TLS_SIZE + TEB_SIZE + STACK_SIZE;
constexpr size_t TEB_OFFSET = PCR_SIZE + TLS_SIZE;
GuestThreadContext::GuestThreadContext(uint32_t cpuNumber)
{
assert(thread == nullptr);
thread = (uint8_t*)g_userHeap.Alloc(TOTAL_SIZE);
memset(thread, 0, TOTAL_SIZE);
*(uint32_t*)thread = ByteSwap(g_memory.MapVirtual(thread + PCR_SIZE)); // tls pointer
*(uint32_t*)(thread + 0x100) = ByteSwap(g_memory.MapVirtual(thread + PCR_SIZE + TLS_SIZE)); // teb pointer
*(thread + 0x10C) = cpuNumber;
*(uint32_t*)(thread + PCR_SIZE + 0x10) = 0xFFFFFFFF; // that one TLS entry that felt quirky
*(uint32_t*)(thread + PCR_SIZE + TLS_SIZE + 0x14C) = ByteSwap(GuestThread::GetCurrentThreadId()); // thread id
ppcContext.r1.u64 = g_memory.MapVirtual(thread + PCR_SIZE + TLS_SIZE + TEB_SIZE + STACK_SIZE); // stack pointer
ppcContext.r13.u64 = g_memory.MapVirtual(thread);
ppcContext.fpscr.loadFromHost();
assert(GetPPCContext() == nullptr);
SetPPCContext(ppcContext);
}
GuestThreadContext::~GuestThreadContext()
{
g_userHeap.Free(thread);
}
#ifdef USE_PTHREAD
static size_t GetStackSize()
{
// Cache as this should not change.
static size_t stackSize = 0;
if (stackSize == 0)
{
// 8 MiB is a typical default.
constexpr auto defaultSize = 8 * 1024 * 1024;
struct rlimit lim;
const auto ret = getrlimit(RLIMIT_STACK, &lim);
if (ret == 0 && lim.rlim_cur < defaultSize)
{
// Use what the system allows.
stackSize = lim.rlim_cur;
}
else
{
stackSize = defaultSize;
}
}
return stackSize;
}
static void* GuestThreadFunc(void* arg)
{
GuestThreadHandle* hThread = (GuestThreadHandle*)arg;
#else
static void GuestThreadFunc(GuestThreadHandle* hThread)
{
#endif
hThread->suspended.wait(true);
GuestThread::Start(hThread->params);
#ifdef USE_PTHREAD
return nullptr;
#endif
}
GuestThreadHandle::GuestThreadHandle(const GuestThreadParams& params)
: params(params), suspended((params.flags & 0x1) != 0)
#ifdef USE_PTHREAD
{
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, GetStackSize());
const auto ret = pthread_create(&thread, &attr, GuestThreadFunc, this);
if (ret != 0) {
fprintf(stderr, "pthread_create failed with error code 0x%X.\n", ret);
return;
}
}
#else
, thread(GuestThreadFunc, this)
{
}
#endif
GuestThreadHandle::~GuestThreadHandle()
{
#ifdef USE_PTHREAD
pthread_join(thread, nullptr);
#else
if (thread.joinable())
thread.join();
#endif
}
template <typename ThreadType>
static uint32_t CalcThreadId(const ThreadType& id)
{
if constexpr (sizeof(id) == 4)
return *reinterpret_cast<const uint32_t*>(&id);
else
return XXH32(&id, sizeof(id), 0);
}
uint32_t GuestThreadHandle::GetThreadId() const
{
#ifdef USE_PTHREAD
return CalcThreadId(thread);
#else
return CalcThreadId(thread.get_id());
#endif
}
uint32_t GuestThreadHandle::Wait(uint32_t timeout)
{
assert(timeout == INFINITE);
#ifdef USE_PTHREAD
pthread_join(thread, nullptr);
#else
if (thread.joinable())
thread.join();
#endif
return STATUS_WAIT_0;
}
uint32_t GuestThread::Start(const GuestThreadParams& params)
{
#ifdef __ANDROID__
perf::SetThreadPriority(false);
perf::RegisterHintThread(gettid());
perf::SetBigCoreAffinity();
#endif
const auto procMask = (uint8_t)(params.flags >> 24);
const auto cpuNumber = procMask == 0 ? 0 : 7 - std::countl_zero(procMask);
GuestThreadContext ctx(cpuNumber);
ctx.ppcContext.r3.u64 = params.value;
g_memory.FindFunction(params.function)(ctx.ppcContext, g_memory.base);
return ctx.ppcContext.r3.u32;
}
GuestThreadHandle* GuestThread::Start(const GuestThreadParams& params, uint32_t* threadId)
{
auto hThread = CreateKernelObject<GuestThreadHandle>(params);
if (threadId != nullptr)
{
*threadId = hThread->GetThreadId();
}
return hThread;
}
uint32_t GuestThread::GetCurrentThreadId()
{
#ifdef USE_PTHREAD
return CalcThreadId(pthread_self());
#else
return CalcThreadId(std::this_thread::get_id());
#endif
}
void GuestThread::SetLastError(uint32_t error)
{
auto* thread = (char*)g_memory.Translate(GetPPCContext()->r13.u32);
if (*(uint32_t*)(thread + 0x150))
{
// Program doesn't want errors
return;
}
// TEB + 0x160 : Win32LastError
*(uint32_t*)(thread + TEB_OFFSET + 0x160) = ByteSwap(error);
}
#ifdef _WIN32
void GuestThread::SetThreadName(uint32_t threadId, const char* name)
{
#pragma pack(push,8)
const DWORD MS_VC_EXCEPTION = 0x406D1388;
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // Must be 0x1000.
LPCSTR szName; // Pointer to name (in user addr space).
DWORD dwThreadID; // Thread ID (-1=caller thread).
DWORD dwFlags; // Reserved for future use, must be zero.
} THREADNAME_INFO;
#pragma pack(pop)
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = name;
info.dwThreadID = threadId;
info.dwFlags = 0;
__try
{
RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR*)&info);
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
}
}
#endif
void SetThreadNameImpl(uint32_t a1, uint32_t threadId, uint32_t* name)
{
#ifdef _WIN32
GuestThread::SetThreadName(threadId, (const char*)g_memory.Translate(ByteSwap(*name)));
#endif
}
int GetThreadPriorityImpl(GuestThreadHandle* hThread)
{
#ifdef _WIN32
return GetThreadPriority(hThread == GetKernelObject(CURRENT_THREAD_HANDLE) ? GetCurrentThread() : hThread->thread.native_handle());
#else
return 0;
#endif
}
uint32_t SetThreadIdealProcessorImpl(GuestThreadHandle* hThread, uint32_t dwIdealProcessor)
{
return 0;
}
GUEST_FUNCTION_HOOK(sub_82DFA2E8, SetThreadNameImpl);
GUEST_FUNCTION_HOOK(sub_82BD57A8, GetThreadPriorityImpl);
GUEST_FUNCTION_HOOK(sub_82BD5910, SetThreadIdealProcessorImpl);
GUEST_FUNCTION_STUB(sub_82BD58F8); // Some function that updates the TEB, don't really care since the field is not set