1 /*- 2 * Copyright (c) 1993 Jan-Simon Pendry 3 * Copyright (c) 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Jan-Simon Pendry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94 34 * 35 * From: 36 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 37 * $FreeBSD$ 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/lock.h> 43 #include <sys/mutex.h> 44 #include <sys/proc.h> 45 #include <sys/ptrace.h> 46 #include <sys/uio.h> 47 48 #include <machine/reg.h> 49 50 #include <fs/pseudofs/pseudofs.h> 51 #include <fs/procfs/procfs.h> 52 53 int 54 procfs_doprocregs(PFS_FILL_ARGS) 55 { 56 int error; 57 struct reg r; 58 59 PROC_LOCK(p); 60 KASSERT(p->p_lock > 0, ("proc not held")); 61 if (p_candebug(td, p)) { 62 PROC_UNLOCK(p); 63 return (EPERM); 64 } 65 66 /* XXXKSE: */ 67 error = proc_read_regs(FIRST_THREAD_IN_PROC(p), &r); 68 if (error == 0) { 69 PROC_UNLOCK(p); 70 error = uiomove_frombuf(&r, sizeof(r), uio); 71 PROC_LOCK(p); 72 } 73 if (error == 0 && uio->uio_rw == UIO_WRITE) { 74 if (!P_SHOULDSTOP(p)) 75 error = EBUSY; 76 else 77 /* XXXKSE: */ 78 error = proc_write_regs(FIRST_THREAD_IN_PROC(p), &r); 79 } 80 PROC_UNLOCK(p); 81 82 uio->uio_offset = 0; 83 return (error); 84 } 85