intercept library calls

void* malloc(size_t size)
{
    static void* (*func)(size_t);
	char str[200];
        void *r;
 
    if(!func) {
	func = (void * (*)(size_t))dlsym(RTLD_NEXT, "malloc");
    }
	r = func(size);
	if(firstRun) {
		start_print();
		firstRun = 0;
	}
	printf("m %p %i\n", r, size);
    return r;
}
 
void* calloc(size_t nelem, size_t elsize)
{
	static void* (*func)();
	char str[200];
	void *r;
	if(!func) {
		func = (void*(*)())dlsym(RTLD_NEXT, "calloc");
	}
	r = func(nelem, elsize);
	printf("c %p %d %d\n", r, nelem, elsize);
	return r;
}