qword: Add mount syscall

sysdeps/qword/generic/generic.cpp

@@ -650,6 +650,21 @@ int sys_setuid(uid_t uid) {
     return ret;
 }
 
+int sys_mount(const char *source, const char *target,
+    const char *filesystemtype, unsigned long mountflags,
+    const void *data) {
+
+    int ret;
+    register unsigned long arg4_reg asm("r10") = mountflags;
+	register const void *arg5_reg asm("r8") = data;
+
+    asm volatile ("syscall" : "=a" (ret)
+            : "a"(41), "D"(source), "S"(target),
+            "d"(filesystemtype), "r"(arg4_reg), "r"(arg5_reg)
+            : "rcx", "r11");
+    return ret;
+}
+
 #endif // MLIBC_BUILDING_RTDL
 
 } // namespace mlibc