/*- * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry under the following copyrights and conditions: * * 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. 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. * * $FreeBSD: src/sys/miscfs/procfs/procfs_dbregs.c,v 1.4.2.3 2002/01/22 17:22:59 nectar Exp $ */ #include #include #include #include #include #include #include #include int procfs_dodbregs(struct proc *curp, struct lwp *lp, struct pfsnode *pfs, struct uio *uio) { struct proc *p = lp->lwp_proc; int error; struct dbreg r; /* Can't trace a process that's currently exec'ing. */ if ((p->p_flags & P_INEXEC) != 0) return EAGAIN; if (!CHECKIO(curp, p) || p_trespass(curp->p_ucred, p->p_ucred)) return (EPERM); LWPHOLD(lp); error = procfs_read_dbregs(lp, &r); if (error == 0) error = uiomove_frombuf(&r, sizeof(r), uio); if (error == 0 && uio->uio_rw == UIO_WRITE) { if (lp->lwp_stat != LSSTOP) error = EBUSY; else error = procfs_write_dbregs(lp, &r); } LWPRELE(lp); uio->uio_offset = 0; return (error); } int procfs_validdbregs(struct lwp *lp) { return ((lp->lwp_proc->p_flags & P_SYSTEM) == 0); }