2 * Copyright (c) 1993 Jan-Simon Pendry
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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13 * notice, this list of conditions and the following disclaimer.
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15 * notice, this list of conditions and the following disclaimer in the
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17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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37 * @(#)procfs_fpregs.c 8.2 (Berkeley) 6/15/94
40 * $FreeBSD: src/sys/miscfs/procfs/procfs_fpregs.c,v 1.11.2.3 2002/01/22 17:22:59 nectar Exp $
41 * $DragonFly: src/sys/vfs/procfs/procfs_fpregs.c,v 1.10 2007/02/19 01:14:24 corecode Exp $
44 #include <sys/param.h>
46 #include <sys/vnode.h>
48 #include <vfs/procfs/procfs.h>
52 procfs_dofpregs(struct proc
*curp
, struct lwp
*lp
, struct pfsnode
*pfs
,
55 struct proc
*p
= lp
->lwp_proc
;
61 /* Can't trace a process that's currently exec'ing. */
62 if ((p
->p_flag
& P_INEXEC
) != 0)
64 if (!CHECKIO(curp
, p
) || p_trespass(curp
->p_ucred
, p
->p_ucred
))
69 kv
+= uio
->uio_offset
;
70 kl
-= uio
->uio_offset
;
71 if (kl
> uio
->uio_resid
)
75 error
= procfs_read_fpregs(lp
, &r
);
77 error
= uiomove_frombuf(&r
, sizeof(r
), uio
);
78 if (error
== 0 && uio
->uio_rw
== UIO_WRITE
) {
79 if (lp
->lwp_stat
!= LSSTOP
)
82 error
= procfs_write_fpregs(lp
, &r
);
91 procfs_validfpregs(struct lwp
*lp
)
93 return ((lp
->lwp_proc
->p_flag
& P_SYSTEM
) == 0);