diff --git a/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp b/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp
index ef7ee9b871..6264fc697f 100644
--- a/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp
@@ -1,4 +1,5 @@
 #include "stdafx.h"
+#include "Utilities/Log.h"
 #include "Emu/Memory/Memory.h"
 #include "Emu/System.h"
 #include "Emu/SysCalls/Modules.h"
@@ -127,6 +128,16 @@ std::string ps3_fmt(PPUThread& context, vm::cptr<char> fmt, u32 g_count, u32 f_c
 				result += string.get_ptr();
 				continue;
 			}
+			case 'u':
+			{
+				// unsigned decimal
+				const u64 value = context.get_next_gpr_arg(g_count, f_count, v_count);
+
+				if (plus_sign || minus_sign || space_sign || number_sign || zero_padding || width || prec) break;
+
+				result += fmt::to_udec(value);
+				continue;
+			}
 			}
 
 			throw EXCEPTION("Unknown formatting: '%s'", start.get_ptr());
@@ -332,12 +343,14 @@ s32 _sys_snprintf(PPUThread& ppu, vm::ptr<char> dst, u32 count, vm::cptr<char> f
 	}
 }
 
-s32 _sys_printf(vm::cptr<char> fmt, ppu_va_args_t va_args)
+s32 _sys_printf(PPUThread& ppu, vm::cptr<char> fmt, ppu_va_args_t va_args)
 {
-	sysPrxForUser.Todo("_sys_printf(fmt=*0x%x, ...)", fmt);
+	sysPrxForUser.Warning("_sys_printf(fmt=*0x%x, ...)", fmt);
+	std::string result = ps3_fmt(ppu, fmt, va_args.g_count, va_args.f_count, va_args.v_count);
 
-	// probably, assertion failed
-	throw EXCEPTION("%s", fmt.get_ptr());
+	LOG_ERROR(TTY, result);
+
+	return CELL_OK;
 }
 
 s32 _sys_sprintf()
diff --git a/rpcs3/Emu/SysCalls/lv2/sys_prx.cpp b/rpcs3/Emu/SysCalls/lv2/sys_prx.cpp
index 9f08e5d0b4..09c6653f11 100644
--- a/rpcs3/Emu/SysCalls/lv2/sys_prx.cpp
+++ b/rpcs3/Emu/SysCalls/lv2/sys_prx.cpp
@@ -260,9 +260,13 @@ s32 sys_prx_get_module_id_by_address()
 	return CELL_OK;
 }
 
-s32 sys_prx_get_module_id_by_name()
+s32 sys_prx_get_module_id_by_name(vm::cptr<char> name, u64 flags, vm::ptr<sys_prx_get_module_id_by_name_option_t> pOpt)
 {
-	sys_prx.Todo("sys_prx_get_module_id_by_name()");
+	const char *realName = name.get_ptr();
+	sys_prx.Todo("sys_prx_get_module_id_by_name(name=%s, flags=%d, pOpt=*0x%x)", realName, flags, pOpt);
+
+	//if (realName == "?") ...
+
 	return CELL_PRX_ERROR_UNKNOWN_MODULE;
 }
 
diff --git a/rpcs3/Emu/SysCalls/lv2/sys_prx.h b/rpcs3/Emu/SysCalls/lv2/sys_prx.h
index 8702126a41..3a2c9afd63 100644
--- a/rpcs3/Emu/SysCalls/lv2/sys_prx.h
+++ b/rpcs3/Emu/SysCalls/lv2/sys_prx.h
@@ -101,6 +101,12 @@ struct sys_prx_param_t
 	be_t<u32> unk2;
 };
 
+struct sys_prx_get_module_id_by_name_option_t
+{
+	be_t<u64> size;
+	vm::ptr<void> base;
+};
+
 // PRX file headers
 struct sys_prx_module_info_t
 {
@@ -125,7 +131,6 @@ struct sys_prx_relocation_info_t
 	vm::bptr<void, u64> ptr;
 };
 
-
 // Data types
 struct sys_prx_load_module_option_t
 {
@@ -180,7 +185,7 @@ s32 sys_prx_unload_module(s32 id, u64 flags, vm::ptr<sys_prx_unload_module_optio
 s32 sys_prx_get_module_list();
 s32 sys_prx_get_my_module_id();
 s32 sys_prx_get_module_id_by_address();
-s32 sys_prx_get_module_id_by_name();
+s32 sys_prx_get_module_id_by_name(vm::cptr<char> name, u64 flags, vm::ptr<sys_prx_get_module_id_by_name_option_t> pOpt);
 s32 sys_prx_get_module_info();
 s32 sys_prx_register_library(vm::ptr<void> library);
 s32 sys_prx_unregister_library(vm::ptr<void> library);