Utility to control the printing of "Fixed up unaligned data access for pid

nnn at pc 0xADDR" and the fixup of the UA fault on the DEC Alpha when an
unaligned access fault happens.  Modeled after the OSF/1 utility of the
same name.

Submitted by:	gallatin

1 files changed, 134 insertions, 0 deletions

diff --git a/usr.bin/uac/uac.c b/usr.bin/uac/uac.c
new file mode 100644
index 0000000..856b9d8
--- /dev/null
+++ b/usr.bin/uac/uac.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2000 Andrew Gallatin and David E. O'Brien
+ * All rights reserved.
+ *
+ * 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 
+ *    in this position and unchanged.
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software withough specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <machine/sysarch.h>
+#include <machine/proc.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <err.h>
+
+extern int sysarch(int, char *);
+static void usage ();
+
+struct parms {
+	u_int64_t uac;
+};
+
+int
+alpha_setuac(u_int64_t uac)
+{
+	struct parms p;
+
+	p.uac = uac;
+	return (sysarch(ALPHA_SET_UAC, (char *)&p));
+}
+
+int
+alpha_getuac(u_int64_t *uac)
+{
+	struct parms p;
+	int error;
+
+	error = sysarch(ALPHA_GET_UAC, (char *)&p);
+	*uac = p.uac;
+	return (error);
+}
+
+static void
+print_uac(u_int64_t uac)
+{
+
+	printf("parent printing is ");
+	if (uac & MDP_UAC_NOPRINT)
+		printf("off\n");
+	else 
+		printf("on\n");
+
+	printf("parent fixup is ");
+	if (uac & MDP_UAC_NOFIX)
+		printf("off\n");
+	else 
+		printf("on\n");
+
+	printf("parent sigbus is ");
+	if (uac & MDP_UAC_SIGBUS)
+		printf("on \n");
+	else 
+		printf("off\n");
+}
+
+int
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	int c;
+	u_int64_t uac;
+
+	if (alpha_getuac(&uac) != 0)
+		err(1, NULL);
+
+	while ((c = getopt(argc, argv, "fpsr")) != -1) {
+		switch (c) {
+		case 'f':
+			uac |= MDP_UAC_NOFIX;
+			break;
+		case 'p':
+			uac |= MDP_UAC_NOPRINT;
+			break;
+		case 's':
+			uac |= MDP_UAC_SIGBUS;
+			break;
+		case 'r':
+			uac = 0;
+			break;
+		default:
+			usage();
+			/* NOTREACHED */   
+		}
+	}
+
+	if (argc != 1) {	
+		if (alpha_setuac(uac) != 0)
+			err(1, NULL);
+	}
+
+	print_uac(uac);
+	return 0;
+}
+
+static void
+usage ()
+{
+
+	fprintf(stderr, "usage: uac [-fprs]\n");
+}