diff --git a/src/core/libraries/kernel/libkernel.cpp b/src/core/libraries/kernel/libkernel.cpp
index 8b47606ae..aeb57e4f8 100644
--- a/src/core/libraries/kernel/libkernel.cpp
+++ b/src/core/libraries/kernel/libkernel.cpp
@@ -225,6 +225,10 @@ s32 PS4_SYSV_ABI sceKernelDlsym(s32 handle, const char* symbol, void** addrp) {
     return ORBIS_OK;
 }
 
+s64 PS4_SYSV_ABI posix_getpagesize() {
+    return 4096;
+}
+
 void LibKernel_Register(Core::Loader::SymbolsResolver* sym) {
     // obj
     LIB_OBJ("f7uOxY9mM1U", "libkernel", 1, "libkernel", 1, 1, &g_stack_chk_guard);
@@ -268,6 +272,7 @@ void LibKernel_Register(Core::Loader::SymbolsResolver* sym) {
     LIB_FUNCTION("-o5uEDpN+oY", "libkernel", 1, "libkernel", 1, 1, sceKernelConvertUtcToLocaltime);
     LIB_FUNCTION("WB66evu8bsU", "libkernel", 1, "libkernel", 1, 1, sceKernelGetCompiledSdkVersion);
     LIB_FUNCTION("DRuBt2pvICk", "libkernel", 1, "libkernel", 1, 1, ps4__read);
+    LIB_FUNCTION("k+AXqu2-eBc", "libScePosix", 1, "libkernel", 1, 1, posix_getpagesize);
 
     Libraries::Kernel::fileSystemSymbolsRegister(sym);
     Libraries::Kernel::timeSymbolsRegister(sym);
diff --git a/src/core/libraries/kernel/time_management.cpp b/src/core/libraries/kernel/time_management.cpp
index 3f5f92eef..5de3d6bee 100644
--- a/src/core/libraries/kernel/time_management.cpp
+++ b/src/core/libraries/kernel/time_management.cpp
@@ -63,9 +63,7 @@ int PS4_SYSV_ABI sceKernelUsleep(u32 microseconds) {
 }
 
 int PS4_SYSV_ABI posix_usleep(u32 microseconds) {
-    ASSERT(microseconds >= 1000);
-    std::this_thread::sleep_for(std::chrono::microseconds(microseconds));
-    return 0;
+    return sceKernelUsleep(microseconds);
 }
 
 u32 PS4_SYSV_ABI sceKernelSleep(u32 seconds) {
@@ -79,11 +77,15 @@ int PS4_SYSV_ABI sceKernelClockGettime(s32 clock_id, OrbisKernelTimespec* tp) {
     }
     clockid_t pclock_id = CLOCK_REALTIME;
     switch (clock_id) {
-    case 0:
+    case ORBIS_CLOCK_REALTIME:
+    case ORBIS_CLOCK_REALTIME_PRECISE:
+    case ORBIS_CLOCK_REALTIME_FAST:
         pclock_id = CLOCK_REALTIME;
         break;
-    case 13:
-    case 4:
+    case ORBIS_CLOCK_SECOND:
+    case ORBIS_CLOCK_MONOTONIC:
+    case ORBIS_CLOCK_MONOTONIC_PRECISE:
+    case ORBIS_CLOCK_MONOTONIC_FAST:
         pclock_id = CLOCK_MONOTONIC;
         break;
     default:
@@ -167,6 +169,7 @@ void timeSymbolsRegister(Core::Loader::SymbolsResolver* sym) {
     LIB_FUNCTION("QcteRwbsnV0", "libScePosix", 1, "libkernel", 1, 1, posix_usleep);
     LIB_FUNCTION("-ZR+hG7aDHw", "libkernel", 1, "libkernel", 1, 1, sceKernelSleep);
     LIB_FUNCTION("0wu33hunNdE", "libScePosix", 1, "libkernel", 1, 1, sceKernelSleep);
+    LIB_FUNCTION("QvsZxomvUHs", "libkernel", 1, "libkernel", 1, 1, sceKernelNanosleep);
     LIB_FUNCTION("yS8U2TGCe1A", "libkernel", 1, "libkernel", 1, 1, posix_nanosleep);
     LIB_FUNCTION("QBi7HCK03hw", "libkernel", 1, "libkernel", 1, 1, sceKernelClockGettime);
     LIB_FUNCTION("lLMT9vJAck0", "libkernel", 1, "libkernel", 1, 1, clock_gettime);
diff --git a/src/core/libraries/kernel/time_management.h b/src/core/libraries/kernel/time_management.h
index 64689bf67..51e8b9bdc 100644
--- a/src/core/libraries/kernel/time_management.h
+++ b/src/core/libraries/kernel/time_management.h
@@ -11,6 +11,25 @@ class SymbolsResolver;
 
 namespace Libraries::Kernel {
 
+constexpr int ORBIS_CLOCK_REALTIME = 0;
+constexpr int ORBIS_CLOCK_VIRTUAL = 1;
+constexpr int ORBIS_CLOCK_PROF = 2;
+constexpr int ORBIS_CLOCK_MONOTONIC = 4;
+constexpr int ORBIS_CLOCK_UPTIME = 5;
+constexpr int ORBIS_CLOCK_UPTIME_PRECISE = 7;
+constexpr int ORBIS_CLOCK_UPTIME_FAST = 8;
+constexpr int ORBIS_CLOCK_REALTIME_PRECISE = 9;
+constexpr int ORBIS_CLOCK_REALTIME_FAST = 10;
+constexpr int ORBIS_CLOCK_MONOTONIC_PRECISE = 11;
+constexpr int ORBIS_CLOCK_MONOTONIC_FAST = 12;
+constexpr int ORBIS_CLOCK_SECOND = 13;
+constexpr int ORBIS_CLOCK_THREAD_CPUTIME_ID = 14;
+constexpr int ORBIS_CLOCK_PROCTIME = 15;
+constexpr int ORBIS_CLOCK_EXT_NETWORK = 16;
+constexpr int ORBIS_CLOCK_EXT_DEBUG_NETWORK = 17;
+constexpr int ORBIS_CLOCK_EXT_AD_NETWORK = 18;
+constexpr int ORBIS_CLOCK_EXT_RAW_NETWORK = 19;
+
 struct OrbisKernelTimeval {
     s64 tv_sec;
     s64 tv_usec;