Support for i386 hardware breakpoints.

Submitted by:	Brian Dean <brdean@unx.sas.com>

1 files changed, 101 insertions, 0 deletions

diff --git a/sys/miscfs/procfs/procfs_dbregs.c b/sys/miscfs/procfs/procfs_dbregs.c
new file mode 100644
index 0000000..02509e0
--- /dev/null
+++ b/sys/miscfs/procfs/procfs_dbregs.c
@@ -0,0 +1,101 @@
+/*-
+ * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com.
+ *                    All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry under the following copyrights and conditions:
+ *
+ * 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.
+ *
+ *	$Id$
+ */
+
+#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>
+#include <vm/vm_extern.h>
+
+int
+procfs_dodbregs(curp, p, pfs, uio)
+	struct proc *curp;
+	struct proc *p;
+	struct pfsnode *pfs;
+	struct uio *uio;
+{
+	int error;
+	struct dbreg r;
+	char *kv;
+	int kl;
+
+	if (!CHECKIO(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_dbregs(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_dbregs(p, &r);
+	}
+	PRELE(p);
+
+	uio->uio_offset = 0;
+	return (error);
+}
+
+int
+procfs_validdbregs(p)
+	struct proc *p;
+{
+	return ((p->p_flag & P_SYSTEM) == 0);
+}