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/* Code to test runtime linking functionality.
* Load a shared object at runtime and verify that arguments passed to
* and from a function that is dynamically looked up make sense.
* This tests that (a) dynamic linking works at all (otherwise all the dl*
* functions don't work) and (b) the dynamic loading functionality works
* and (c) the PLT is sane and calling convention makes sense.
*
* We have to pass an absolute path to dlopen() for which we rely on
* the test run script.
*
* The module we load is in mod.c.
*/
#include <stdlib.h>
#include <stdio.h>
#include <dlfcn.h>
int max_error = 2;
#include "common.h"
#include "magic.h"
int main (int argc, char *argv[])
{
void *dlhandle;
long (*modf) (long, long *, long);
long v, *cookie = NULL, cookie2 = 0;
start(63);
if(argc != 2) {
fprintf(stderr, "Usage: %s <module>\n", argv[0]);
exit(1);
}
if(!(dlhandle = dlopen(argv[1], RTLD_LAZY))) e(1);
if(!(modf = dlsym(dlhandle, "modfunction"))) e(2);
if(!(cookie = (long *) dlsym(dlhandle, "cookie"))) e(3);
if(*cookie == MAGIC2) { fprintf(stderr, "cookie already set\n"); e(4); }
if(cookie2 == MAGIC3) { fprintf(stderr, "cookie2 already set\n"); e(5); }
v = modf(MAGIC4, &cookie2, MAGIC5);
if(v != MAGIC1) { fprintf(stderr, "return value wrong\n"); e(9); }
if(*cookie != MAGIC2) { fprintf(stderr, "cookie set wrongly\n"); e(6); }
if(cookie2 != MAGIC3) { fprintf(stderr, "cookie2 set wrongly\n"); e(7); }
dlclose(dlhandle);
if(v != MAGIC1) { fprintf(stderr, "wrong return value.\n"); e(8); }
quit();
return(0);
}
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