diff --git a/src/common/logging/backend.cpp b/src/common/logging/backend.cpp
index 9b7ea9cd1..930b1ac30 100644
--- a/src/common/logging/backend.cpp
+++ b/src/common/logging/backend.cpp
@@ -70,7 +70,7 @@ public:
     ~FileBackend() = default;
 
     void Write(const Entry& entry) {
-        if (!enabled) {
+        if (!enabled && entry.log_level != Level::Critical) {
             return;
         }
 
diff --git a/src/core/libraries/avplayer/avplayer_impl.cpp b/src/core/libraries/avplayer/avplayer_impl.cpp
index db32862ad..138747da4 100644
--- a/src/core/libraries/avplayer/avplayer_impl.cpp
+++ b/src/core/libraries/avplayer/avplayer_impl.cpp
@@ -12,28 +12,28 @@ void* PS4_SYSV_ABI AvPlayer::Allocate(void* handle, u32 alignment, u32 size) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto allocate = self->m_init_data_original.memory_replacement.allocate;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return allocate(ptr, alignment, size);
+    return Core::ExecuteGuest(allocate, ptr, alignment, size);
 }
 
 void PS4_SYSV_ABI AvPlayer::Deallocate(void* handle, void* memory) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto deallocate = self->m_init_data_original.memory_replacement.deallocate;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return deallocate(ptr, memory);
+    return Core::ExecuteGuest(deallocate, ptr, memory);
 }
 
 void* PS4_SYSV_ABI AvPlayer::AllocateTexture(void* handle, u32 alignment, u32 size) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto allocate = self->m_init_data_original.memory_replacement.allocate_texture;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return allocate(ptr, alignment, size);
+    return Core::ExecuteGuest(allocate, ptr, alignment, size);
 }
 
 void PS4_SYSV_ABI AvPlayer::DeallocateTexture(void* handle, void* memory) {
     const auto* const self = reinterpret_cast<AvPlayer*>(handle);
     const auto deallocate = self->m_init_data_original.memory_replacement.deallocate_texture;
     const auto ptr = self->m_init_data_original.memory_replacement.object_ptr;
-    return deallocate(ptr, memory);
+    return Core::ExecuteGuest(deallocate, ptr, memory);
 }
 
 int PS4_SYSV_ABI AvPlayer::OpenFile(void* handle, const char* filename) {
@@ -42,7 +42,7 @@ int PS4_SYSV_ABI AvPlayer::OpenFile(void* handle, const char* filename) {
 
     const auto open = self->m_init_data_original.file_replacement.open;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return open(ptr, filename);
+    return Core::ExecuteGuest(open, ptr, filename);
 }
 
 int PS4_SYSV_ABI AvPlayer::CloseFile(void* handle) {
@@ -51,7 +51,7 @@ int PS4_SYSV_ABI AvPlayer::CloseFile(void* handle) {
 
     const auto close = self->m_init_data_original.file_replacement.close;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return close(ptr);
+    return Core::ExecuteGuest(close, ptr);
 }
 
 int PS4_SYSV_ABI AvPlayer::ReadOffsetFile(void* handle, u8* buffer, u64 position, u32 length) {
@@ -60,7 +60,7 @@ int PS4_SYSV_ABI AvPlayer::ReadOffsetFile(void* handle, u8* buffer, u64 position
 
     const auto read_offset = self->m_init_data_original.file_replacement.read_offset;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return read_offset(ptr, buffer, position, length);
+    return Core::ExecuteGuest(read_offset, ptr, buffer, position, length);
 }
 
 u64 PS4_SYSV_ABI AvPlayer::SizeFile(void* handle) {
@@ -69,7 +69,7 @@ u64 PS4_SYSV_ABI AvPlayer::SizeFile(void* handle) {
 
     const auto size = self->m_init_data_original.file_replacement.size;
     const auto ptr = self->m_init_data_original.file_replacement.object_ptr;
-    return size(ptr);
+    return Core::ExecuteGuest(size, ptr);
 }
 
 AvPlayerInitData AvPlayer::StubInitData(const AvPlayerInitData& data) {
diff --git a/src/core/libraries/avplayer/avplayer_state.cpp b/src/core/libraries/avplayer/avplayer_state.cpp
index dbaa36d18..e1b11840e 100644
--- a/src/core/libraries/avplayer/avplayer_state.cpp
+++ b/src/core/libraries/avplayer/avplayer_state.cpp
@@ -92,7 +92,7 @@ void AvPlayerState::DefaultEventCallback(void* opaque, AvPlayerEvents event_id,
     const auto callback = self->m_event_replacement.event_callback;
     const auto ptr = self->m_event_replacement.object_ptr;
     if (callback != nullptr) {
-        callback(ptr, event_id, 0, event_data);
+        Core::ExecuteGuest(callback, ptr, event_id, 0, event_data);
     }
 }
 
diff --git a/src/core/libraries/ime/ime.cpp b/src/core/libraries/ime/ime.cpp
index 96ae446fa..258cc61e1 100644
--- a/src/core/libraries/ime/ime.cpp
+++ b/src/core/libraries/ime/ime.cpp
@@ -99,16 +99,16 @@ public:
         if (m_ime_mode) {
             OrbisImeParam param = m_param.ime;
             if (use_param_handler) {
-                param.handler(param.arg, event);
+                Core::ExecuteGuest(param.handler, param.arg, event);
             } else {
-                handler(param.arg, event);
+                Core::ExecuteGuest(handler, param.arg, event);
             }
         } else {
             OrbisImeKeyboardParam param = m_param.key;
             if (use_param_handler) {
-                param.handler(param.arg, event);
+                Core::ExecuteGuest(param.handler, param.arg, event);
             } else {
-                handler(param.arg, event);
+                Core::ExecuteGuest(handler, param.arg, event);
             }
         }
     }
diff --git a/src/core/libraries/ime/ime_dialog_ui.cpp b/src/core/libraries/ime/ime_dialog_ui.cpp
index 9611e7c49..4a95c60c9 100644
--- a/src/core/libraries/ime/ime_dialog_ui.cpp
+++ b/src/core/libraries/ime/ime_dialog_ui.cpp
@@ -131,7 +131,8 @@ bool ImeDialogState::CallTextFilter() {
         return false;
     }
 
-    int ret = text_filter(out_text, &out_text_length, src_text, src_text_length);
+    int ret =
+        Core::ExecuteGuest(text_filter, out_text, &out_text_length, src_text, src_text_length);
 
     if (ret != 0) {
         return false;
@@ -152,7 +153,7 @@ bool ImeDialogState::CallKeyboardFilter(const OrbisImeKeycode* src_keycode, u16*
         return true;
     }
 
-    int ret = keyboard_filter(src_keycode, out_keycode, out_status, nullptr);
+    int ret = Core::ExecuteGuest(keyboard_filter, src_keycode, out_keycode, out_status, nullptr);
     return ret == 0;
 }
 
diff --git a/src/core/libraries/kernel/equeue.cpp b/src/core/libraries/kernel/equeue.cpp
index 72e38b265..9291c0a1a 100644
--- a/src/core/libraries/kernel/equeue.cpp
+++ b/src/core/libraries/kernel/equeue.cpp
@@ -8,6 +8,7 @@
 #include "common/logging/log.h"
 #include "core/libraries/kernel/equeue.h"
 #include "core/libraries/kernel/orbis_error.h"
+#include "core/libraries/kernel/time.h"
 #include "core/libraries/libs.h"
 
 namespace Libraries::Kernel {
@@ -15,23 +16,39 @@ namespace Libraries::Kernel {
 extern boost::asio::io_context io_context;
 extern void KernelSignalRequest();
 
-static constexpr auto HrTimerSpinlockThresholdUs = 1200u;
+static constexpr auto HrTimerSpinlockThresholdNs = 1200000u;
 
 // Events are uniquely identified by id and filter.
-
 bool EqueueInternal::AddEvent(EqueueEvent& event) {
     std::scoped_lock lock{m_mutex};
 
+    // Calculate timer interval
     event.time_added = std::chrono::steady_clock::now();
     if (event.event.filter == SceKernelEvent::Filter::Timer ||
         event.event.filter == SceKernelEvent::Filter::HrTimer) {
-        // HrTimer events are offset by the threshold of time at the end that we spinlock for
-        // greater accuracy.
-        const auto offset =
-            event.event.filter == SceKernelEvent::Filter::HrTimer ? HrTimerSpinlockThresholdUs : 0u;
-        event.timer_interval = std::chrono::microseconds(event.event.data - offset);
+        // Set timer interval
+        event.timer_interval = std::chrono::nanoseconds(event.event.data);
     }
 
+    // First, check if there's already an event with the same id and filter.
+    u64 id = event.event.ident;
+    SceKernelEvent::Filter filter = event.event.filter;
+    const auto& find_it = std::ranges::find_if(m_events, [id, filter](auto& ev) {
+        return ev.event.ident == id && ev.event.filter == filter;
+    });
+    // If there is a duplicate event, we need to update that instead.
+    if (find_it != m_events.cend()) {
+        // Specifically, update user data and timer_interval.
+        // Trigger status and event data should remain intact.
+        auto& old_event = *find_it;
+        old_event.timer_interval = event.timer_interval;
+        old_event.event.udata = event.event.udata;
+        return true;
+    }
+
+    // Clear input data from event.
+    event.event.data = 0;
+
     // Remove add flag from event
     event.event.flags &= ~SceKernelEvent::Flags::Add;
 
@@ -157,6 +174,9 @@ bool EqueueInternal::TriggerEvent(u64 ident, s16 filter, void* trigger_data) {
                     event.TriggerDisplay(trigger_data);
                 } else if (filter == SceKernelEvent::Filter::User) {
                     event.TriggerUser(trigger_data);
+                } else if (filter == SceKernelEvent::Filter::Timer ||
+                           filter == SceKernelEvent::Filter::HrTimer) {
+                    event.TriggerTimer();
                 } else {
                     event.Trigger(trigger_data);
                 }
@@ -197,7 +217,7 @@ bool EqueueInternal::AddSmallTimer(EqueueEvent& ev) {
     SmallTimer st;
     st.event = ev.event;
     st.added = std::chrono::steady_clock::now();
-    st.interval = std::chrono::microseconds{ev.event.data};
+    st.interval = std::chrono::nanoseconds{ev.event.data};
     {
         std::scoped_lock lock{m_mutex};
         m_small_timers[st.event.ident] = std::move(st);
@@ -307,30 +327,23 @@ int PS4_SYSV_ABI sceKernelWaitEqueue(SceKernelEqueue eq, SceKernelEvent* ev, int
 }
 
 static void HrTimerCallback(SceKernelEqueue eq, const SceKernelEvent& kevent) {
-    static EqueueEvent event;
-    event.event = kevent;
-    event.event.data = HrTimerSpinlockThresholdUs;
-    eq->AddSmallTimer(event);
     eq->TriggerEvent(kevent.ident, SceKernelEvent::Filter::HrTimer, kevent.udata);
 }
 
-s32 PS4_SYSV_ABI sceKernelAddHRTimerEvent(SceKernelEqueue eq, int id, timespec* ts, void* udata) {
+s32 PS4_SYSV_ABI sceKernelAddHRTimerEvent(SceKernelEqueue eq, int id, OrbisKernelTimespec* ts,
+                                          void* udata) {
     if (eq == nullptr) {
         return ORBIS_KERNEL_ERROR_EBADF;
     }
 
-    if (ts->tv_sec > 100 || ts->tv_nsec < 100'000) {
-        return ORBIS_KERNEL_ERROR_EINVAL;
-    }
-    ASSERT(ts->tv_nsec > 1000); // assume 1us resolution
-    const auto total_us = ts->tv_sec * 1000'000 + ts->tv_nsec / 1000;
+    const auto total_ns = ts->tv_sec * 1000000000 + ts->tv_nsec;
 
     EqueueEvent event{};
     event.event.ident = id;
     event.event.filter = SceKernelEvent::Filter::HrTimer;
     event.event.flags = SceKernelEvent::Flags::Add | SceKernelEvent::Flags::OneShot;
     event.event.fflags = 0;
-    event.event.data = total_us;
+    event.event.data = total_ns;
     event.event.udata = udata;
 
     // HR timers cannot be implemented within the existing event queue architecture due to the
@@ -340,12 +353,7 @@ s32 PS4_SYSV_ABI sceKernelAddHRTimerEvent(SceKernelEqueue eq, int id, timespec*
     // `HrTimerSpinlockThresholdUs`) and fall back to boost asio timers if the time to tick is
     // large. Even for large delays, we truncate a small portion to complete the wait
     // using the spinlock, prioritizing precision.
-
-    if (eq->EventExists(event.event.ident, event.event.filter)) {
-        eq->RemoveEvent(id, SceKernelEvent::Filter::HrTimer);
-    }
-
-    if (total_us < HrTimerSpinlockThresholdUs) {
+    if (total_ns < HrTimerSpinlockThresholdNs) {
         return eq->AddSmallTimer(event) ? ORBIS_OK : ORBIS_KERNEL_ERROR_ENOMEM;
     }
 
@@ -391,16 +399,9 @@ int PS4_SYSV_ABI sceKernelAddTimerEvent(SceKernelEqueue eq, int id, SceKernelUse
     event.event.filter = SceKernelEvent::Filter::Timer;
     event.event.flags = SceKernelEvent::Flags::Add;
     event.event.fflags = 0;
-    event.event.data = usec;
+    event.event.data = usec * 1000;
     event.event.udata = udata;
 
-    if (eq->EventExists(event.event.ident, event.event.filter)) {
-        eq->RemoveEvent(id, SceKernelEvent::Filter::Timer);
-        LOG_DEBUG(Kernel_Event,
-                  "Timer event already exists, removing it: queue name={}, queue id={}",
-                  eq->GetName(), event.event.ident);
-    }
-
     LOG_DEBUG(Kernel_Event, "Added timing event: queue name={}, queue id={}, usec={}, pointer={:x}",
               eq->GetName(), event.event.ident, usec, reinterpret_cast<uintptr_t>(udata));
 
diff --git a/src/core/libraries/kernel/equeue.h b/src/core/libraries/kernel/equeue.h
index 06b667008..83b4b8689 100644
--- a/src/core/libraries/kernel/equeue.h
+++ b/src/core/libraries/kernel/equeue.h
@@ -81,7 +81,7 @@ struct EqueueEvent {
     SceKernelEvent event;
     void* data = nullptr;
     std::chrono::steady_clock::time_point time_added;
-    std::chrono::microseconds timer_interval;
+    std::chrono::nanoseconds timer_interval;
     std::unique_ptr<boost::asio::steady_timer> timer;
 
     void Clear() {
@@ -92,7 +92,6 @@ struct EqueueEvent {
 
     void Trigger(void* data) {
         is_triggered = true;
-        event.fflags++;
         event.data = reinterpret_cast<uintptr_t>(data);
     }
 
@@ -101,6 +100,11 @@ struct EqueueEvent {
         event.udata = data;
     }
 
+    void TriggerTimer() {
+        is_triggered = true;
+        event.data++;
+    }
+
     void TriggerDisplay(void* data) {
         is_triggered = true;
         if (data != nullptr) {
@@ -135,7 +139,7 @@ class EqueueInternal {
     struct SmallTimer {
         SceKernelEvent event;
         std::chrono::steady_clock::time_point added;
-        std::chrono::microseconds interval;
+        std::chrono::nanoseconds interval;
     };
 
 public:
diff --git a/src/core/libraries/kernel/threads/pthread.cpp b/src/core/libraries/kernel/threads/pthread.cpp
index 0218285f7..20bd20f4b 100644
--- a/src/core/libraries/kernel/threads/pthread.cpp
+++ b/src/core/libraries/kernel/threads/pthread.cpp
@@ -194,21 +194,6 @@ int PS4_SYSV_ABI posix_pthread_detach(PthreadT pthread) {
     return 0;
 }
 
-#ifdef __clang__
-__attribute__((optnone))
-#else
-__attribute__((optimize("O0")))
-#endif
-void ClearStack(const PthreadAttr& attr) {
-    void* sp;
-    asm("mov %%rsp, %0" : "=rm"(sp));
-    // leave a safety net of 128 bytes for memset
-    const u64 size = (u64)sp - (u64)attr.stackaddr_attr - 128;
-    volatile void* buf = alloca(size);
-    memset(const_cast<void*>(buf), 0, size);
-    buf = nullptr;
-}
-
 static void RunThread(void* arg) {
     auto* curthread = static_cast<Pthread*>(arg);
     g_curthread = curthread;
@@ -217,12 +202,7 @@ static void RunThread(void* arg) {
 
     /* Run the current thread's start routine with argument: */
     curthread->native_thr.Initialize();
-    Core::EnsureThreadInitialized();
-
-    // Clear the stack before running the guest thread
-    ClearStack(curthread->attr);
-
-    void* ret = curthread->start_routine(curthread->arg);
+    void* ret = Core::ExecuteGuest(curthread->start_routine, curthread->arg);
 
     /* Remove thread from tracking */
     DebugState.RemoveCurrentThreadFromGuestList();
diff --git a/src/core/libraries/kernel/threads/pthread_spec.cpp b/src/core/libraries/kernel/threads/pthread_spec.cpp
index 38032f174..094866a5a 100644
--- a/src/core/libraries/kernel/threads/pthread_spec.cpp
+++ b/src/core/libraries/kernel/threads/pthread_spec.cpp
@@ -84,7 +84,7 @@ void _thread_cleanupspecific() {
                  * destructor:
                  */
                 lk.unlock();
-                destructor(data);
+                Core::ExecuteGuest(destructor, data);
                 lk.lock();
             }
         }
diff --git a/src/core/libraries/network/net_ctl_obj.cpp b/src/core/libraries/network/net_ctl_obj.cpp
index a4081cd11..a295477b6 100644
--- a/src/core/libraries/network/net_ctl_obj.cpp
+++ b/src/core/libraries/network/net_ctl_obj.cpp
@@ -50,7 +50,7 @@ void NetCtlInternal::CheckCallback() {
                                                          : ORBIS_NET_CTL_EVENT_TYPE_DISCONNECTED;
     for (const auto [func, arg] : callbacks) {
         if (func != nullptr) {
-            func(event, arg);
+            Core::ExecuteGuest(func, event, arg);
         }
     }
 }
@@ -61,7 +61,7 @@ void NetCtlInternal::CheckNpToolkitCallback() {
                                                          : ORBIS_NET_CTL_EVENT_TYPE_DISCONNECTED;
     for (const auto [func, arg] : nptool_callbacks) {
         if (func != nullptr) {
-            func(event, arg);
+            Core::ExecuteGuest(func, event, arg);
         }
     }
 }
diff --git a/src/core/libraries/ngs2/ngs2.cpp b/src/core/libraries/ngs2/ngs2.cpp
index 97d19c352..2f785f9a0 100644
--- a/src/core/libraries/ngs2/ngs2.cpp
+++ b/src/core/libraries/ngs2/ngs2.cpp
@@ -160,13 +160,13 @@ s32 PS4_SYSV_ABI sceNgs2SystemCreateWithAllocator(const OrbisNgs2SystemOption* o
             result = SystemSetup(option, &bufferInfo, 0, 0);
             if (result >= 0) {
                 uintptr_t sysUserData = allocator->userData;
-                result = hostAlloc(&bufferInfo);
+                result = Core::ExecuteGuest(hostAlloc, &bufferInfo);
                 if (result >= 0) {
                     OrbisNgs2Handle* handleCopy = outHandle;
                     result = SystemSetup(option, &bufferInfo, hostFree, handleCopy);
                     if (result < 0) {
                         if (hostFree) {
-                            hostFree(&bufferInfo);
+                            Core::ExecuteGuest(hostFree, &bufferInfo);
                         }
                     }
                 }
diff --git a/src/core/libraries/usbd/emulated/dimensions.cpp b/src/core/libraries/usbd/emulated/dimensions.cpp
index 4d38c66fa..272f2f649 100644
--- a/src/core/libraries/usbd/emulated/dimensions.cpp
+++ b/src/core/libraries/usbd/emulated/dimensions.cpp
@@ -3,8 +3,6 @@
 
 #include "dimensions.h"
 
-#include "core/tls.h"
-
 #include <mutex>
 #include <thread>
 
@@ -624,8 +622,6 @@ libusb_transfer_status DimensionsBackend::HandleAsyncTransfer(libusb_transfer* t
 s32 DimensionsBackend::SubmitTransfer(libusb_transfer* transfer) {
     if (transfer->endpoint == 0x01) {
         std::thread write_thread([this, transfer] {
-            Core::EnsureThreadInitialized();
-
             HandleAsyncTransfer(transfer);
 
             const u8 flags = transfer->flags;
diff --git a/src/core/libraries/videoout/driver.cpp b/src/core/libraries/videoout/driver.cpp
index 21163119d..2f44b1c99 100644
--- a/src/core/libraries/videoout/driver.cpp
+++ b/src/core/libraries/videoout/driver.cpp
@@ -315,20 +315,25 @@ void VideoOutDriver::PresentThread(std::stop_token token) {
         {
             // Needs lock here as can be concurrently read by `sceVideoOutGetVblankStatus`
             std::scoped_lock lock{main_port.vo_mutex};
+
+            // Trigger flip events for the port
+            for (auto& event : main_port.vblank_events) {
+                if (event != nullptr) {
+                    event->TriggerEvent(static_cast<u64>(OrbisVideoOutInternalEventId::Vblank),
+                                        Kernel::SceKernelEvent::Filter::VideoOut,
+                                        reinterpret_cast<void*>(
+                                            static_cast<u64>(OrbisVideoOutInternalEventId::Vblank) |
+                                            (vblank_status.count << 16)));
+                }
+            }
+
+            // Update vblank status
             vblank_status.count++;
             vblank_status.process_time = Libraries::Kernel::sceKernelGetProcessTime();
             vblank_status.tsc = Libraries::Kernel::sceKernelReadTsc();
             main_port.vblank_cv.notify_all();
         }
 
-        // Trigger flip events for the port.
-        for (auto& event : main_port.vblank_events) {
-            if (event != nullptr) {
-                event->TriggerEvent(static_cast<u64>(OrbisVideoOutInternalEventId::Vblank),
-                                    Kernel::SceKernelEvent::Filter::VideoOut, nullptr);
-            }
-        }
-
         timer.End();
     }
 }
diff --git a/src/core/linker.cpp b/src/core/linker.cpp
index 20d81409e..7a0653e9f 100644
--- a/src/core/linker.cpp
+++ b/src/core/linker.cpp
@@ -135,8 +135,7 @@ void Linker::Execute(const std::vector<std::string>& args) {
             }
         }
         params.entry_addr = module->GetEntryAddress();
-        Core::EnsureThreadInitialized();
-        RunMainEntry(&params);
+        ExecuteGuest(RunMainEntry, &params);
     });
 }
 
@@ -380,7 +379,8 @@ void* Linker::TlsGetAddr(u64 module_index, u64 offset) {
     if (!addr) {
         // Module was just loaded by above code. Allocate TLS block for it.
         const u32 init_image_size = module->tls.init_image_size;
-        u8* dest = reinterpret_cast<u8*>(heap_api->heap_malloc(module->tls.image_size));
+        u8* dest = reinterpret_cast<u8*>(
+            Core::ExecuteGuest(heap_api->heap_malloc, module->tls.image_size));
         const u8* src = reinterpret_cast<const u8*>(module->tls.image_virtual_addr);
         std::memcpy(dest, src, init_image_size);
         std::memset(dest + init_image_size, 0, module->tls.image_size - init_image_size);
@@ -412,7 +412,7 @@ void* Linker::AllocateTlsForThread(bool is_primary) {
         ASSERT_MSG(ret == 0, "Unable to allocate TLS+TCB for the primary thread");
     } else {
         if (heap_api) {
-            addr_out = heap_api->heap_malloc(total_tls_size);
+            addr_out = Core::ExecuteGuest(heap_api->heap_malloc, total_tls_size);
         } else {
             addr_out = std::malloc(total_tls_size);
         }
@@ -422,7 +422,7 @@ void* Linker::AllocateTlsForThread(bool is_primary) {
 
 void Linker::FreeTlsForNonPrimaryThread(void* pointer) {
     if (heap_api) {
-        heap_api->heap_free(pointer);
+        Core::ExecuteGuest(heap_api->heap_free, pointer);
     } else {
         std::free(pointer);
     }
diff --git a/src/core/module.cpp b/src/core/module.cpp
index d9c56e6ef..8e789f8b1 100644
--- a/src/core/module.cpp
+++ b/src/core/module.cpp
@@ -97,8 +97,7 @@ Module::~Module() = default;
 s32 Module::Start(u64 args, const void* argp, void* param) {
     LOG_INFO(Core_Linker, "Module started : {}", name);
     const VAddr addr = dynamic_info.init_virtual_addr + GetBaseAddress();
-    Core::EnsureThreadInitialized();
-    return reinterpret_cast<EntryFunc>(addr)(args, argp, param);
+    return ExecuteGuest(reinterpret_cast<EntryFunc>(addr), args, argp, param);
 }
 
 void Module::LoadModuleToMemory(u32& max_tls_index) {
diff --git a/src/core/tls.h b/src/core/tls.h
index 00eba188e..27de518ea 100644
--- a/src/core/tls.h
+++ b/src/core/tls.h
@@ -45,6 +45,29 @@ Tcb* GetTcbBase();
 /// Makes sure TLS is initialized for the thread before entering guest.
 void EnsureThreadInitialized();
 
+template <size_t size>
+#ifdef __clang__
+__attribute__((optnone))
+#else
+__attribute__((optimize("O0")))
+#endif
+void ClearStack() {
+    volatile void* buf = alloca(size);
+    memset(const_cast<void*>(buf), 0, size);
+    buf = nullptr;
+}
+
+template <class ReturnType, class... FuncArgs, class... CallArgs>
+ReturnType ExecuteGuest(PS4_SYSV_ABI ReturnType (*func)(FuncArgs...), CallArgs&&... args) {
+    EnsureThreadInitialized();
+    // clear stack to avoid trash from EnsureThreadInitialized
+    auto* tcb = GetTcbBase();
+    if (tcb != nullptr && tcb->tcb_fiber == nullptr) {
+        ClearStack<12_KB>();
+    }
+    return func(std::forward<CallArgs>(args)...);
+}
+
 template <class F, F f>
 struct HostCallWrapperImpl;