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/*
* Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* Extremely simple dynamic loader, must never be linked with anything other
* than the standard C library. Its purpose is to try to load a dynamic module
* and verify the presence of one symbol, if that's given.
*/
#include <stdio.h>
#include <stdlib.h>
#include <openssl/core.h>
#include "simpledynamic.h"
static int test_load(const char *path, const char *symbol)
{
#ifdef SD_INIT
SD sd = SD_INIT;
SD_SYM sym;
int ret;
if (!sd_load(path, &sd, SD_MODULE))
return 0;
ret = symbol == NULL || sd_sym(sd, symbol, &sym);
if (!sd_close(sd))
ret = 0;
return ret;
#else
fprintf(stderr, "No dynamic loader\n");
return 0;
#endif
}
int main(int argc, char *argv[])
{
const char *m, *s;
if (argc != 2 && argc != 3) {
fprintf(stderr, "Usage: %s sharedobject [ entrypoint ]\n", argv[0]);
return 1;
}
m = argv[1];
s = argc == 3 ? argv[2] : NULL;
return test_load(m, s) ? 0 : 1;
}
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