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authorcvs2svn <cvs2svn@FreeBSD.org>2001-08-12 14:29:20 +0000
committercvs2svn <cvs2svn@FreeBSD.org>2001-08-12 14:29:20 +0000
commit4e2c43952bcdaadf95d74c0119007546b7df8c8a (patch)
tree958103bb637f39341368454981aa977eee563ccc /sys/miscfs/procfs/procfs_fpregs.c
parent70a72dca6f59b365fd9a9bc5bba1da72576de630 (diff)
downloadsrc-4e2c43952bcdaadf95d74c0119007546b7df8c8a.tar.gz
src-4e2c43952bcdaadf95d74c0119007546b7df8c8a.zip
This commit was manufactured by cvs2svn to create branch 'RELENG_4_4'.
Notes
Notes: svn path=/releng/4.4/; revision=81549
Diffstat (limited to 'sys/miscfs/procfs/procfs_fpregs.c')
-rw-r--r--sys/miscfs/procfs/procfs_fpregs.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/sys/miscfs/procfs/procfs_fpregs.c b/sys/miscfs/procfs/procfs_fpregs.c
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+++ b/sys/miscfs/procfs/procfs_fpregs.c
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+/*
+ * Copyright (c) 1993 Jan-Simon Pendry
+ * Copyright (c) 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)procfs_fpregs.c 8.2 (Berkeley) 6/15/94
+ *
+ * From:
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/proc.h>
+#include <sys/vnode.h>
+#include <machine/reg.h>
+#include <miscfs/procfs/procfs.h>
+#include <vm/vm.h>
+
+int
+procfs_dofpregs(curp, p, pfs, uio)
+ struct proc *curp;
+ struct proc *p;
+ struct pfsnode *pfs;
+ struct uio *uio;
+{
+ int error;
+ struct fpreg r;
+ char *kv;
+ int kl;
+
+ if (!CHECKIO(curp, p) || p_trespass(curp, p))
+ return EPERM;
+ kl = sizeof(r);
+ kv = (char *) &r;
+
+ kv += uio->uio_offset;
+ kl -= uio->uio_offset;
+ if (kl > uio->uio_resid)
+ kl = uio->uio_resid;
+
+ PHOLD(p);
+
+ if (kl < 0)
+ error = EINVAL;
+ else
+ error = procfs_read_fpregs(p, &r);
+ if (error == 0)
+ error = uiomove(kv, kl, uio);
+ if (error == 0 && uio->uio_rw == UIO_WRITE) {
+ if (p->p_stat != SSTOP)
+ error = EBUSY;
+ else
+ error = procfs_write_fpregs(p, &r);
+ }
+ PRELE(p);
+
+ uio->uio_offset = 0;
+ return (error);
+}
+
+int
+procfs_validfpregs(p)
+ struct proc *p;
+{
+
+ return ((p->p_flag & P_SYSTEM) == 0);
+}