wip: extend shared library support, window demo

kernel/src/Api/Syscall.cpp

@@ -417,6 +417,8 @@ namespace Montauk {
                 return Sys_UnloadLib(frame->arg1);
             case SYS_DLSYM:
                 return (int64_t)Sys_DLSym(frame->arg1, frame->arg2);
+            case SYS_GETLIBBASE:
+                return (int64_t)Sys_GetLibBase(frame->arg1);
             default:
                 return -1;
         }

kernel/src/Api/Syscall.hpp

@@ -210,6 +210,7 @@ namespace Montauk {
     static constexpr uint64_t SYS_LOAD_LIB      = 114;
     static constexpr uint64_t SYS_UNLOAD_LIB     = 115;
     static constexpr uint64_t SYS_DLSYM          = 116;
+    static constexpr uint64_t SYS_GETLIBBASE     = 117;
 
     static constexpr uint32_t IPC_SIGNAL_READABLE   = 1u << 0;
     static constexpr uint32_t IPC_SIGNAL_WRITABLE   = 1u << 1;