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 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)procfs_fpregs.c 8.2 (Berkeley) 6/15/94 38 * 39 * From: 40 * $FreeBSD: src/sys/miscfs/procfs/procfs_fpregs.c,v 1.11.2.3 2002/01/22 17:22:59 nectar Exp $ 41 * $DragonFly: src/sys/vfs/procfs/procfs_fpregs.c,v 1.2 2003/06/17 04:28:42 dillon Exp $ 42 */ 43 44 #include <sys/param.h> 45 #include <sys/proc.h> 46 #include <sys/vnode.h> 47 #include <machine/reg.h> 48 #include <miscfs/procfs/procfs.h> 49 #include <vm/vm.h> 50 51 int 52 procfs_dofpregs(curp, p, pfs, uio) 53 struct proc *curp; 54 struct proc *p; 55 struct pfsnode *pfs; 56 struct uio *uio; 57 { 58 int error; 59 struct fpreg r; 60 char *kv; 61 int kl; 62 63 /* Can't trace a process that's currently exec'ing. */ 64 if ((p->p_flag & P_INEXEC) != 0) 65 return EAGAIN; 66 if (!CHECKIO(curp, p) || p_trespass(curp, p)) 67 return EPERM; 68 kl = sizeof(r); 69 kv = (char *) &r; 70 71 kv += uio->uio_offset; 72 kl -= uio->uio_offset; 73 if (kl > uio->uio_resid) 74 kl = uio->uio_resid; 75 76 PHOLD(p); 77 78 if (kl < 0) 79 error = EINVAL; 80 else 81 error = procfs_read_fpregs(p, &r); 82 if (error == 0) 83 error = uiomove(kv, kl, uio); 84 if (error == 0 && uio->uio_rw == UIO_WRITE) { 85 if (p->p_stat != SSTOP) 86 error = EBUSY; 87 else 88 error = procfs_write_fpregs(p, &r); 89 } 90 PRELE(p); 91 92 uio->uio_offset = 0; 93 return (error); 94 } 95 96 int 97 procfs_validfpregs(p) 98 struct proc *p; 99 { 100 101 return ((p->p_flag & P_SYSTEM) == 0); 102 } 103