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/* usymbol test case
* 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, to poke into glibc
* we get the sa_restorer fields in the stap script.
*
* XXX - Seems sa_restorer isn't set on all architectures. should use
* our own shared library and set signal handler from there. Also
* need to handle @plt symbols (setting a handler in the main
* executable that is in a shared library will have the @plt address,
* not the address inside the shared library).
*/
#include <signal.h>
typedef void (*sighandler_t)(int);
void
handler (int signum)
{
/* dummy handler, just used for the address... */
}
sighandler_t
libc_handler (void *func)
{
return (sighandler_t) func;
}
int
main (int argc, char *argv[], char *envp[])
{
// Use SIGFPE since we never expect that to be triggered.
signal(SIGFPE, handler);
}
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