1 /*- 2 * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Jan-Simon Pendry under the following copyrights and conditions: 7 * 8 * Copyright (c) 1993 Jan-Simon Pendry 9 * Copyright (c) 1993 10 * The Regents of the University of California. All rights reserved. 11 * 12 * This code is derived from software contributed to Berkeley by 13 * Jan-Simon Pendry. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 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 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * From: @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94 40 * 41 * From: 42 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 43 * $FreeBSD$ 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 #include <sys/proc.h> 51 #include <sys/ptrace.h> 52 #include <sys/uio.h> 53 54 #include <machine/reg.h> 55 56 #include <fs/pseudofs/pseudofs.h> 57 #include <fs/procfs/procfs.h> 58 59 int 60 procfs_doprocdbregs(PFS_FILL_ARGS) 61 { 62 int error; 63 struct dbreg r; 64 65 PROC_LOCK(p); 66 KASSERT(p->p_lock > 0, ("proc not held")); 67 if (p_candebug(td, p) != 0) { 68 PROC_UNLOCK(p); 69 return (EPERM); 70 } 71 72 /* XXXKSE: */ 73 error = proc_read_dbregs(FIRST_THREAD_IN_PROC(p), &r); 74 if (error == 0) { 75 PROC_UNLOCK(p); 76 error = uiomove_frombuf(&r, sizeof(r), uio); 77 PROC_LOCK(p); 78 } 79 if (error == 0 && uio->uio_rw == UIO_WRITE) { 80 if (!P_SHOULDSTOP(p)) /* XXXKSE should be P_TRACED? */ 81 error = EBUSY; 82 else 83 /* XXXKSE: */ 84 error = proc_write_dbregs(FIRST_THREAD_IN_PROC(p), &r); 85 } 86 PROC_UNLOCK(p); 87 88 uio->uio_offset = 0; 89 return (error); 90 } 91