Module Name: src
Committed By: riastradh
Date: Sat Nov 27 14:11:14 UTC 2021
Modified Files:
src/sys/kern: kern_crashme.c
Log Message:
kern: Add debug.crashme.null_jump.
To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 src/sys/kern/kern_crashme.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/kern/kern_crashme.c
diff -u src/sys/kern/kern_crashme.c:1.4 src/sys/kern/kern_crashme.c:1.5
--- src/sys/kern/kern_crashme.c:1.4 Tue Sep 7 11:00:13 2021
+++ src/sys/kern/kern_crashme.c Sat Nov 27 14:11:14 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: kern_crashme.c,v 1.4 2021/09/07 11:00:13 riastradh Exp $ */
+/* $NetBSD: kern_crashme.c,v 1.5 2021/11/27 14:11:14 riastradh Exp $ */
/*
* Copyright (c) 2018, 2019 Matthew R. Green
@@ -59,6 +59,7 @@ static int crashme_sysctl_forwarder(SYSC
static int crashme_panic(int);
static int crashme_null_deref(int);
+static int crashme_null_jump(int);
#ifdef DDB
static int crashme_ddb(int);
#endif
@@ -73,6 +74,7 @@ static int crashme_ddb(int);
static crashme_node nodes[] = {
CMNODE("panic", "plain old panic", crashme_panic),
CMNODE("null_deref", "null dereference", crashme_null_deref),
+ CMNODE("null_jump", "jump to null", crashme_null_jump),
#ifdef DDB
CMNODE("ddb", "enter ddb directly", crashme_ddb),
#endif
@@ -249,6 +251,16 @@ crashme_null_deref(int flags)
return -1;
}
+static int
+crashme_null_jump(int flags)
+{
+ void (*volatile f)(int) = NULL;
+
+ (*f)(flags);
+ /* make sure to have a nontrivial return address here */
+ return -1;
+}
+
#ifdef DDB
static int
crashme_ddb(int flags)
