Commit | Line | Data |
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d8c7b802 JSP |
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 8.1 (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 | } |