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. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * $FreeBSD: src/sys/miscfs/procfs/procfs_dbregs.c,v 1.4.2.3 2002/01/22 17:22:59 nectar Exp $
42 #include <sys/param.h>
46 #include <sys/vnode.h>
48 #include <vfs/procfs/procfs.h>
52 procfs_dodbregs(struct proc *curp, struct lwp *lp, struct pfsnode *pfs,
55 struct proc *p = lp->lwp_proc;
59 /* Can't trace a process that's currently exec'ing. */
60 if ((p->p_flags & P_INEXEC) != 0)
62 if (!CHECKIO(curp, p) || p_trespass(curp->p_ucred, p->p_ucred))
65 error = procfs_read_dbregs(lp, &r);
67 error = uiomove_frombuf(&r, sizeof(r), uio);
68 if (error == 0 && uio->uio_rw == UIO_WRITE) {
69 if (lp->lwp_stat != LSSTOP)
72 error = procfs_write_dbregs(lp, &r);
81 procfs_validdbregs(struct lwp *lp)
83 return ((lp->lwp_proc->p_flags & P_SYSTEM) == 0);