about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/m68k/select.S
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/sysv/linux/m68k/select.S')
-rw-r--r--sysdeps/unix/sysv/linux/m68k/select.S53
1 files changed, 53 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/m68k/select.S b/sysdeps/unix/sysv/linux/m68k/select.S
new file mode 100644
index 0000000000..2770df82d1
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/m68k/select.S
@@ -0,0 +1,53 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+#define _ERRNO_H
+#include <errnos.h>
+
+/* Linux has two versions of the select system call.  The old one expected
+   one argument which must be a pointer to a struct which contains the
+   five values.  The new version expects the five arguments be given in the
+   registers.  First try the new version, if it's not available fall back
+   to the old version.  */
+
+	.text
+	SYSCALL_ERROR_HANDLER
+ENTRY (__select)
+
+#if 0 /* For now only use the old version.  */
+	DO_CALL (#SYS_ify (_newselect), 5)
+	tst.l %d0
+	jmi 1f
+	rts
+
+1:	move.l #-ENOSYS, %d1
+	cmp.l %d1, %d0
+	jne syscall_error	/* Real error */
+
+	/* Try again using the old syscall interface.  */
+#endif
+	lea 4(%sp), %a0
+	move.l %a0, %d1
+	move.l #SYS_ify (select), %d0
+	trap #0
+	tst.l %d0
+	jmi syscall_error
+	ret
+
+weak_alias (__select, select)