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27 results

compat.c

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  • compat.c 2.25 KiB
    // SPDX-License-Identifier: GPL-2.0
    /*
     * 32 bit compatibility code for System V IPC
     *
     * Copyright (C) 1997,1998	Jakub Jelinek (jj@sunsite.mff.cuni.cz)
     * Copyright (C) 1997		David S. Miller (davem@caip.rutgers.edu)
     * Copyright (C) 1999		Arun Sharma <arun.sharma@intel.com>
     * Copyright (C) 2000		VA Linux Co
     * Copyright (C) 2000		Don Dugger <n0ano@valinux.com>
     * Copyright (C) 2000           Hewlett-Packard Co.
     * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
     * Copyright (C) 2000           Gerhard Tonn (ton@de.ibm.com)
     * Copyright (C) 2000-2002      Andi Kleen, SuSE Labs (x86-64 port)
     * Copyright (C) 2000		Silicon Graphics, Inc.
     * Copyright (C) 2001		IBM
     * Copyright (C) 2004		IBM Deutschland Entwicklung GmbH, IBM Corporation
     * Copyright (C) 2004		Arnd Bergmann (arnd@arndb.de)
     *
     * This code is collected from the versions for sparc64, mips64, s390x, ia64,
     * ppc64 and x86_64, all of which are based on the original sparc64 version
     * by Jakub Jelinek.
     *
     */
    #include <linux/compat.h>
    #include <linux/errno.h>
    #include <linux/highuid.h>
    #include <linux/init.h>
    #include <linux/msg.h>
    #include <linux/shm.h>
    #include <linux/syscalls.h>
    #include <linux/ptrace.h>
    
    #include <linux/mutex.h>
    #include <linux/uaccess.h>
    
    #include "util.h"
    
    int get_compat_ipc64_perm(struct ipc64_perm *to,
    			  struct compat_ipc64_perm __user *from)
    {
    	struct compat_ipc64_perm v;
    	if (copy_from_user(&v, from, sizeof(v)))
    		return -EFAULT;
    	to->uid = v.uid;
    	to->gid = v.gid;
    	to->mode = v.mode;
    	return 0;
    }
    
    int get_compat_ipc_perm(struct ipc64_perm *to,
    			struct compat_ipc_perm __user *from)
    {
    	struct compat_ipc_perm v;
    	if (copy_from_user(&v, from, sizeof(v)))
    		return -EFAULT;
    	to->uid = v.uid;
    	to->gid = v.gid;
    	to->mode = v.mode;
    	return 0;
    }
    
    void to_compat_ipc64_perm(struct compat_ipc64_perm *to, struct ipc64_perm *from)
    {
    	to->key = from->key;
    	to->uid = from->uid;
    	to->gid = from->gid;
    	to->cuid = from->cuid;
    	to->cgid = from->cgid;
    	to->mode = from->mode;
    	to->seq = from->seq;
    }
    
    void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)
    {
    	to->key = from->key;
    	SET_UID(to->uid, from->uid);
    	SET_GID(to->gid, from->gid);
    	SET_UID(to->cuid, from->cuid);
    	SET_GID(to->cgid, from->cgid);
    	to->mode = from->mode;
    	to->seq = from->seq;
    }