#define _GNU_SOURCE
#include <dlfcn.h>

__attribute__((__visibility__("hidden"))) int __dl_invalid_handle(void*);

__attribute__((__visibility__("hidden"))) void __dl_seterr(const char*, ...);

int dlinfo(void* dso, int req, void* res) {
  if (__dl_invalid_handle(dso))
    return -1;
  if (req != RTLD_DI_LINKMAP) {
    __dl_seterr("Unsupported request %d", req);
    return -1;
  }
  *(struct link_map**)res = dso;
  return 0;
}