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successfully emulates a few test program that use poll semaphores, including the attach-to-file-descriptor-and-select feature. There are a few issues: 1) at least one ioctl need to set retval. We handle this in irix_sys_ioctl() by replacing the data argument by a pointer to a strucutre in the stackgap that carries the real data and retval. The underlying ioctl methods can therefore retreive both data and retval. 2) usemaclone is a cloning device: each time it is open, it creates a new context, and ioctl operation on each open file descriptor will lead to different behavior. This functionnality is available in NetBSD through the devvp branch. This first implementation does not use devvp yet, but this should be done later. Currently, we create a new vnode, and we provide our own vnode operations. Some operation are applied to the cloned vnode, others are applied to the original vnode. The v_data field is used to hold a reference to the original vnode so that we can work on it. 3) at least the setattr vnode operation needs some customisation: IRIX libc relies on the fact that fchmod on /dev/usema will return 0 in case of failure.
53 lines
2.2 KiB
C
53 lines
2.2 KiB
C
/* $NetBSD: irix_ioctl.h,v 1.2 2002/05/22 05:14:01 manu Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _IRIX_IOCTL_H_
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#define _IRIX_IOCTL_H_
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#include <compat/svr4/svr4_ioctl.h>
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struct irix_ioctl_usrdata {
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caddr_t iiu_data;
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register_t *iiu_retval;
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};
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/* From IRIX's <net/raw.h> */
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#define IRIX_SIOCNREAD SVR4_IOR('s', 10, int)
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#endif /* _IRIX_IOCTL_H_ */
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