diff --git a/core/libs/prx/libkernel/Pthread/src/Thread.cpp b/core/libs/prx/libkernel/Pthread/src/Thread.cpp
index 98d952d68..3dc69cbab 100644
--- a/core/libs/prx/libkernel/Pthread/src/Thread.cpp
+++ b/core/libs/prx/libkernel/Pthread/src/Thread.cpp
@@ -444,8 +444,7 @@ int APS5_VABI scePthreadOnce(int32_t* once, void (APS5_VABI* init)(void)) {
 extern "C" {
 
 void APS5_VABI __pthread_cxa_finalize_nid_postfix(void* argument) {
-    (void)argument;
-    NotImplemented_nid_no_patch(__func__);
+    CxaFinalize_nid_no_patch(argument);
 }
 
 }
diff --git a/core/libs/prx/libkernel/Socket/src/Socket.cpp b/core/libs/prx/libkernel/Socket/src/Socket.cpp
index 1568af931..23fa5a215 100644
--- a/core/libs/prx/libkernel/Socket/src/Socket.cpp
+++ b/core/libs/prx/libkernel/Socket/src/Socket.cpp
@@ -74,12 +74,4 @@ int APS5_VABI select_nid_postfix(int nfds, void* readfds, void* writefds, void*
  return 0;
 }
 
-int APS5_VABI sigprocmask_nid_postfix(int how, const void* set, void* oset) {
- (void)how;
- (void)set;
- (void)oset;
- NotImplemented_nid_no_patch(__func__);
- return 0;
-}
-
 }
diff --git a/core/libs/prx/libkernel/System/src/Signals.cpp b/core/libs/prx/libkernel/System/src/Signals.cpp
index 94a4e3be5..990708277 100644
--- a/core/libs/prx/libkernel/System/src/Signals.cpp
+++ b/core/libs/prx/libkernel/System/src/Signals.cpp
@@ -84,6 +84,11 @@ int APS5_VABI _sigprocmask_nid_postfix(int how, const GuestSignalSet* set, Guest
     }
     return 0;
 }
+
+int APS5_VABI sigprocmask_nid_postfix(int how, const void* set, void* previousSet) {
+    return _sigprocmask_nid_postfix(how, static_cast<const GuestSignalSet*>(set),
+                                    static_cast<GuestSignalSet*>(previousSet));
+}
 }
 
 extern "C" {
diff --git a/core/libs/prx/libkernel/Time/Time.cpp b/core/libs/prx/libkernel/Time/Time.cpp
index 2d2ca3cc5..c3b9d6138 100644
--- a/core/libs/prx/libkernel/Time/Time.cpp
+++ b/core/libs/prx/libkernel/Time/Time.cpp
@@ -481,9 +481,8 @@ uint64_t APS5_VABI sceKernelGetTscFrequency(void) {
 }
 
 unsigned int APS5_VABI sceKernelSleep(unsigned int seconds) {
- (void)seconds;
- NotImplemented_nid_no_patch(__func__);
- return 0;
+    TimedWait::SleepNanos(static_cast<std::uint64_t>(seconds) * 1000000000ULL);
+    return 0;
 }
 
 }
diff --git a/core/libs/tests/GuestCondTimedwait.cpp b/core/libs/tests/GuestCondTimedwait.cpp
index 52b734e0a..310812871 100644
--- a/core/libs/tests/GuestCondTimedwait.cpp
+++ b/core/libs/tests/GuestCondTimedwait.cpp
@@ -13,8 +13,14 @@ int APS5_VABI scePthreadMutexUnlock(PthreadMutex* mutex);
 int APS5_VABI scePthreadCondInit(PthreadCond* cond, const PthreadCondattr* attr, const char* name);
 int APS5_VABI scePthreadCondDestroy(PthreadCond* cond);
 int APS5_VABI scePthreadCondTimedwait(PthreadCond* cond, PthreadMutex* mutex, unsigned int usec);
+int APS5_VABI __cxa_atexit_nid_postfix(void (APS5_VABI *)(void*), void*, void*);
+void APS5_VABI __pthread_cxa_finalize_nid_postfix(void*);
+unsigned int APS5_VABI sceKernelSleep(unsigned int seconds);
 }
 
+static int cleanupAt = -1;
+static void APS5_VABI Cleanup(void*) { cleanupAt = 0; }
+
 static constexpr int SCE_OK = 0;
 static constexpr int SCE_KERNEL_ERROR_ETIMEDOUT = static_cast<int>(0x8002003C);
 
@@ -49,4 +55,10 @@ int main() {
 
     Require(scePthreadCondDestroy(&cond) == SCE_OK);
     Require(scePthreadMutexDestroy(&context.mutex) == SCE_OK);
+
+    Require(sceKernelSleep(0) == SCE_OK);
+    void* finalizeHandle = reinterpret_cast<void*>(7);
+    Require(__cxa_atexit_nid_postfix(Cleanup, nullptr, finalizeHandle) == SCE_OK);
+    __pthread_cxa_finalize_nid_postfix(finalizeHandle);
+    Require(cleanupAt == 0);
 }
diff --git a/core/libs/tests/GuestSignals.cpp b/core/libs/tests/GuestSignals.cpp
index 9d3ba7afe..01dc72048 100644
--- a/core/libs/tests/GuestSignals.cpp
+++ b/core/libs/tests/GuestSignals.cpp
@@ -6,8 +6,12 @@ using Handler = void (APS5_VABI *)(int);
 extern "C" {
 Handler APS5_VABI signal_nid_postfix(int, Handler);
 int APS5_VABI raise_nid_postfix(int);
+int APS5_VABI sigprocmask_nid_postfix(int, const void*, void*);
 int* APS5_VABI __error_nid_postfix();
 }
+struct GuestSignalSet {
+    std::uint32_t bits[4];
+};
 volatile std::sig_atomic_t received = 0;
 void APS5_VABI Callback(int value) { received = value; }
 static void Require(bool value) { if (!value) std::abort(); }
@@ -25,4 +29,13 @@ int main() {
     Require(raise_nid_postfix(15) == 0 && received == 0);
     Require(signal_nid_postfix(15, nullptr) == ignore);
     Require(raise_nid_postfix(100) == -1 && *__error_nid_postfix() == 22);
+    GuestSignalSet blocked{{0x20, 0, 0, 0}};
+    GuestSignalSet previous{{}};
+    Require(sigprocmask_nid_postfix(3, &blocked, &previous) == 0);
+    Require(previous.bits[0] == 0);
+    Require(sigprocmask_nid_postfix(1, nullptr, &previous) == 0);
+    Require(previous.bits[0] == 0x20);
+    Require(sigprocmask_nid_postfix(2, &blocked, nullptr) == 0);
+    Require(sigprocmask_nid_postfix(1, nullptr, &previous) == 0);
+    Require(previous.bits[0] == 0);
 }