#include <sys/types.h>
#include <sys/exec_elf.h>

#include <assert.h>
#include <dlfcn.h>
#include <link.h>
#include <stddef.h>
#include <string.h>

static int
nonzero(char *s, size_t n)
{
        size_t i;

        for (i = 0; i < n; i++)
                if (s[i] != 0)
                        return (1);

        return (0);
}

static int foundldso = 0;

static int
callback(struct dl_phdr_info *info, size_t size, void *cookie)
{
        int i;
        int foundrandomize = 0;

        assert(size >= sizeof(struct dl_phdr_info));

        if (strcmp(info->dlpi_name, "/usr/libexec/ld.so") != 0)
                return (0);
        foundldso = 1;

        for (i = 0; i < info->dlpi_phnum; i++)
                if (info->dlpi_phdr[i].p_type == PT_OPENBSD_RANDOMIZE) {
                        foundrandomize = 1;
                        assert(nonzero((char *)(info->dlpi_phdr[i].p_vaddr +
                            info->dlpi_addr), info->dlpi_phdr[i].p_memsz));
                }

        assert(foundrandomize);
        return (0);
}

int
main()
{
        dl_iterate_phdr(callback, NULL);
        assert(foundldso);
        return (0);
}