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 * %sccs.include.redist.c% 10 * 11 * @(#)procfs_fpregs.c 8.2 (Berkeley) 06/15/94 12 * 13 * From: 14 * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 15 */ 16 17 #include <sys/param.h> 18 #include <sys/systm.h> 19 #include <sys/time.h> 20 #include <sys/kernel.h> 21 #include <sys/proc.h> 22 #include <sys/vnode.h> 23 #include <machine/reg.h> 24 #include <miscfs/procfs/procfs.h> 25 26 int 27 procfs_dofpregs(curp, p, pfs, uio) 28 struct proc *curp; 29 struct proc *p; 30 struct pfsnode *pfs; 31 struct uio *uio; 32 { 33 int error; 34 struct fpreg r; 35 char *kv; 36 int kl; 37 38 kl = sizeof(r); 39 kv = (char *) &r; 40 41 kv += uio->uio_offset; 42 kl -= uio->uio_offset; 43 if (kl > uio->uio_resid) 44 kl = uio->uio_resid; 45 46 if (kl < 0) 47 error = EINVAL; 48 else 49 error = procfs_read_fpregs(p, &r); 50 if (error == 0) 51 error = uiomove(kv, kl, uio); 52 if (error == 0 && uio->uio_rw == UIO_WRITE) { 53 if (p->p_stat != SSTOP) 54 error = EBUSY; 55 else 56 error = procfs_write_fpregs(p, &r); 57 } 58 59 uio->uio_offset = 0; 60 return (error); 61 } 62 63 int 64 procfs_validfpregs(p) 65 struct proc *p; 66 { 67 68 return ((p->p_flag & P_SYSTEM) == 0); 69 } 70