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authorDave Brolley <brolley@redhat.com>2009-04-02 12:38:15 -0400
committerDave Brolley <brolley@redhat.com>2009-04-02 12:38:15 -0400
commit2f53f831393d2f0db3d54260c2a7882eff17905c (patch)
treeba140bbad1fd4acaa7c2253949a2b2ade53952a2 /testsuite/systemtap.context/usymbols_lib.c
parent2f54c4fe5a3aa21b4d5c38edabf83f3cdad0177d (diff)
parent15a78144473940a4e7c685cc57ba09a92f2293c6 (diff)
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Merge branch 'master' of git://sources.redhat.com/git/systemtap
Conflicts: configure
Diffstat (limited to 'testsuite/systemtap.context/usymbols_lib.c')
-rw-r--r--testsuite/systemtap.context/usymbols_lib.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/testsuite/systemtap.context/usymbols_lib.c b/testsuite/systemtap.context/usymbols_lib.c
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+++ b/testsuite/systemtap.context/usymbols_lib.c
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+/* usymbol test case - library helper
+ * Copyright (C) 2008, Red Hat Inc.
+ *
+ * This file is part of systemtap, and is free software. You can
+ * redistribute it and/or modify it under the terms of the GNU General
+ * Public License (GPL); either version 2, or (at your option) any
+ * later version.
+ *
+ * Uses signal to tranfer user space addresses into the kernel where a
+ * probe on sigaction will extract them and produce the symbols. To
+ * poke into the executable we get the sa_handler set through signal
+ * from this library.
+ */
+
+#include <signal.h>
+typedef void (*sighandler_t)(int);
+
+void
+lib_handler (int signum)
+{
+ /* dummy handler, just used for the address... */
+}
+
+void
+lib_main ()
+{
+ // Use SIGFPE since we never expect that to be triggered.
+ signal(SIGFPE, lib_handler);
+}