1 /* $NetBSD: procfs_regs.c,v 1.9 1995/08/13 09:06:07 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1993 Jan-Simon Pendry 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Jan-Simon Pendry. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 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 * @(#)procfs_regs.c 8.4 (Berkeley) 6/15/94 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/time.h> 45 #include <sys/kernel.h> 46 #include <sys/proc.h> 47 #include <sys/vnode.h> 48 #include <sys/ptrace.h> 49 #include <machine/reg.h> 50 #include <miscfs/procfs/procfs.h> 51 52 int 53 procfs_doregs(curp, p, pfs, uio) 54 struct proc *curp; 55 struct proc *p; 56 struct pfsnode *pfs; 57 struct uio *uio; 58 { 59 #if defined(PT_GETREGS) || defined(PT_SETREGS) 60 int error; 61 struct reg r; 62 char *kv; 63 int kl; 64 65 kl = sizeof(r); 66 kv = (char *) &r; 67 68 kv += uio->uio_offset; 69 kl -= uio->uio_offset; 70 if (kl > uio->uio_resid) 71 kl = uio->uio_resid; 72 73 PHOLD(p); 74 75 if (kl < 0) 76 error = EINVAL; 77 else 78 error = process_read_regs(p, &r); 79 if (error == 0) 80 error = uiomove(kv, kl, uio); 81 if (error == 0 && uio->uio_rw == UIO_WRITE) { 82 if (p->p_stat != SSTOP) 83 error = EBUSY; 84 else 85 error = process_write_regs(p, &r); 86 } 87 88 PRELE(p); 89 90 uio->uio_offset = 0; 91 return (error); 92 #else 93 return (EINVAL); 94 #endif 95 } 96 97 int 98 procfs_validregs(p) 99 struct proc *p; 100 { 101 102 #if defined(PT_SETREGS) || defined(PT_GETREGS) 103 return ((p->p_flag & P_SYSTEM) == 0); 104 #else 105 return (0); 106 #endif 107 } 108