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/* external var test case - library helper
* Copyright (C) 2009, 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.
*
* Tests that an external exported variable can be accessed.
*/
#include <stdlib.h>
struct libstruct
{
int i;
long l;
char c;
struct libstruct *s1;
struct libstruct *s2;
};
int libvar;
struct libstruct *lib_s;
static int stat_libvar;
static struct libstruct *stat_lib_s;
static void
lib_call ()
{
asm(""); // dummy method, just to probe and extract.
}
void
lib_main ()
{
libvar = 42;
stat_libvar = libvar;
asm ("nop" : "=r"(stat_libvar) : "r"(stat_libvar));
lib_s = (struct libstruct *) malloc(sizeof(struct libstruct));
lib_s->i = 1;
lib_s->l = 2;
lib_s->c = 3;
lib_s->s1 = lib_s;
lib_s->s2 = NULL;
stat_lib_s = lib_s;
asm ("nop" : "=r"(stat_lib_s) : "r"(stat_lib_s));
lib_call ();
}
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