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>
49 #include <sys/vnode.h>
51 #include <vfs/procfs/procfs.h>
55 procfs_dodbregs(struct proc
*curp
, struct lwp
*lp
, struct pfsnode
*pfs
,
58 struct proc
*p
= lp
->lwp_proc
;
64 /* Can't trace a process that's currently exec'ing. */
65 if ((p
->p_flag
& P_INEXEC
) != 0)
67 if (!CHECKIO(curp
, p
) || p_trespass(curp
->p_ucred
, p
->p_ucred
))
72 kv
+= uio
->uio_offset
;
73 kl
-= uio
->uio_offset
;
74 if (kl
> uio
->uio_resid
)
78 error
= procfs_read_dbregs(lp
, &r
);
80 error
= uiomove_frombuf(&r
, sizeof(r
), uio
);
81 if (error
== 0 && uio
->uio_rw
== UIO_WRITE
) {
82 if (lp
->lwp_stat
!= LSSTOP
)
85 error
= procfs_write_dbregs(lp
, &r
);
94 procfs_validdbregs(struct lwp
*lp
)
96 return ((lp
->lwp_proc
->p_flag
& P_SYSTEM
) == 0);