112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/* $NetBSD: procfs_regs.c,v 1.12 2001/01/17 00:09:08 fvdl Exp $ */
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/*
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* Copyright (c) 1993 Jan-Simon Pendry
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include <miscfs/procfs/procfs.h>
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int
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procfs_doregs(curp, p, pfs, uio)
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struct proc *curp; /* tracer */
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struct proc *p; /* traced */
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struct pfsnode *pfs;
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struct uio *uio;
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{
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#if defined(PT_GETREGS) || defined(PT_SETREGS)
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int error;
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struct reg r;
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char *kv;
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int kl;
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if ((error = procfs_checkioperm(curp, p)) != 0)
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return (EPERM);
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kl = sizeof(r);
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kv = (char *) &r;
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kv += uio->uio_offset;
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kl -= uio->uio_offset;
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if (kl > uio->uio_resid)
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kl = uio->uio_resid;
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PHOLD(p);
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if (kl < 0)
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error = EINVAL;
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else
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error = process_read_regs(p, &r);
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if (error == 0)
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error = uiomove(kv, kl, uio);
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if (error == 0 && uio->uio_rw == UIO_WRITE) {
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if (p->p_stat != SSTOP)
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error = EBUSY;
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else
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error = process_write_regs(p, &r);
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}
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PRELE(p);
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uio->uio_offset = 0;
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return (error);
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#else
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return (EINVAL);
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#endif
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}
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int
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procfs_validregs(p, mp)
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struct proc *p;
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struct mount *mp;
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{
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#if defined(PT_SETREGS) || defined(PT_GETREGS)
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return ((p->p_flag & P_SYSTEM) == 0);
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#else
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return (0);
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#endif
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}
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