2 * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com.
5 * This code is derived from software contributed to Berkeley by
6 * Jan-Simon Pendry under the following copyrights and conditions:
8 * Copyright (c) 1993 Jan-Simon Pendry
10 * The Regents of the University of California. All rights reserved.
12 * This code is derived from software contributed to Berkeley by
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. All advertising materials mentioning features or use of this software
24 * must display the following acknowledgement:
25 * This product includes software developed by the University of
26 * California, Berkeley and its contributors.
27 * 4. Neither the name of the University nor the names of its contributors
28 * may be used to endorse or promote products derived from this software
29 * without specific prior written permission.
31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * $FreeBSD: src/sys/miscfs/procfs/procfs_dbregs.c,v 1.4.2.3 2002/01/22 17:22:59 nectar Exp $
44 * $DragonFly: src/sys/vfs/procfs/procfs_dbregs.c,v 1.10 2007/02/19 01:14:24 corecode Exp $
47 #include <sys/param.h>
50 #include <sys/vnode.h>
52 #include <vfs/procfs/procfs.h>
56 procfs_dodbregs(struct proc *curp, struct lwp *lp, struct pfsnode *pfs,
59 struct proc *p = lp->lwp_proc;
65 /* Can't trace a process that's currently exec'ing. */
66 if ((p->p_flag & P_INEXEC) != 0)
68 if (!CHECKIO(curp, p) || p_trespass(curp->p_ucred, p->p_ucred))
73 kv += uio->uio_offset;
74 kl -= uio->uio_offset;
75 if (kl > uio->uio_resid)
79 error = procfs_read_dbregs(lp, &r);
81 error = uiomove_frombuf(&r, sizeof(r), uio);
82 if (error == 0 && uio->uio_rw == UIO_WRITE) {
83 if (lp->lwp_stat != LSSTOP)
86 error = procfs_write_dbregs(lp, &r);
95 procfs_validdbregs(struct lwp *lp)
97 return ((lp->lwp_proc->p_flag & P_SYSTEM) == 0);