| 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) %G% |
| 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 | } |