fix sys_open macro for archs without the plain open syscall

src/internal/syscall.h

@@ -192,10 +192,10 @@ long __syscall_ret(unsigned long), __syscall(syscall_arg_t, ...),
 #define __sys_open_cp2(x,pn,fl) __syscall_cp2(SYS_open, pn, (fl)|O_LARGEFILE)
 #define __sys_open_cp3(x,pn,fl,mo) __syscall_cp3(SYS_open, pn, (fl)|O_LARGEFILE, mo)
 #else
-#define __sys_open2(x,pn,fl) __syscall2(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
-#define __sys_open3(x,pn,fl,mo) __syscall3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
-#define __sys_open_cp2(x,pn,fl) __syscall_cp2(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
-#define __sys_open_cp3(x,pn,fl,mo) __syscall_cp3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
+#define __sys_open2(x,pn,fl) __syscall3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
+#define __sys_open3(x,pn,fl,mo) __syscall4(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
+#define __sys_open_cp2(x,pn,fl) __syscall_cp3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
+#define __sys_open_cp3(x,pn,fl,mo) __syscall_cp4(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
 #endif
 
 #define __sys_open(...) __SYSCALL_DISP(__sys_open,,__VA_ARGS__)