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 * $FreeBSD$ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/proc.h> 45 #include <sys/vnode.h> 46 #include <machine/reg.h> 47 #include <miscfs/procfs/procfs.h> 48 #include <vm/vm.h> 49 50 int 51 procfs_dofpregs(curp, p, pfs, uio) 52 struct proc *curp; 53 struct proc *p; 54 struct pfsnode *pfs; 55 struct uio *uio; 56 { 57 int error; 58 struct fpreg r; 59 char *kv; 60 int kl; 61 62 if (p_trespass(curp, p)) 63 return EPERM; 64 kl = sizeof(r); 65 kv = (char *) &r; 66 67 kv += uio->uio_offset; 68 kl -= uio->uio_offset; 69 if (kl > uio->uio_resid) 70 kl = uio->uio_resid; 71 72 PHOLD(p); 73 74 if (kl < 0) 75 error = EINVAL; 76 else 77 error = procfs_read_fpregs(p, &r); 78 if (error == 0) 79 error = uiomove(kv, kl, uio); 80 if (error == 0 && uio->uio_rw == UIO_WRITE) { 81 if (p->p_stat != SSTOP) 82 error = EBUSY; 83 else 84 error = procfs_write_fpregs(p, &r); 85 } 86 PRELE(p); 87 88 uio->uio_offset = 0; 89 return (error); 90 } 91 92 int 93 procfs_validfpregs(p) 94 struct proc *p; 95 { 96 return ((p->p_flag & P_SYSTEM) == 0); 97 } 98