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/* $OpenBSD: procfs_regs.c,v 1.4 1997/08/29 04:24:38 millert Exp $ */
/* $NetBSD: procfs_regs.c,v 1.9 1995/08/13 09:06:07 mycroft Exp $ */
/*
* Copyright (c) 1993 Jan-Simon Pendry
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/ptrace.h>
#include <machine/reg.h>
#include <miscfs/procfs/procfs.h>
int
procfs_doregs(curp, p, pfs, uio)
struct proc *curp; /* tracer */
struct proc *p; /* traced */
struct pfsnode *pfs;
struct uio *uio;
{
#if defined(PT_GETREGS) || defined(PT_SETREGS)
int error;
struct reg r;
char *kv;
int kl;
if ((error = procfs_checkioperm(curp, p)) != 0)
return (error);
kl = sizeof(r);
kv = (char *) &r;
kv += uio->uio_offset;
kl -= uio->uio_offset;
if (kl > uio->uio_resid)
kl = uio->uio_resid;
PHOLD(p);
if (kl < 0)
error = EINVAL;
else
error = process_read_regs(p, &r);
if (error == 0)
error = uiomove(kv, kl, uio);
if (error == 0 && uio->uio_rw == UIO_WRITE) {
if (p->p_stat != SSTOP)
error = EBUSY;
else
error = process_write_regs(p, &r);
}
PRELE(p);
uio->uio_offset = 0;
return (error);
#else
return (EINVAL);
#endif
}
int
procfs_validregs(p)
struct proc *p;
{
#if defined(PT_SETREGS) || defined(PT_GETREGS)
return ((p->p_flag & P_SYSTEM) == 0);
#else
return (0);
#endif
}
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