linux-sgx-trts-modified/sdk/tlibcrypto/sgxssl/init_tcrypto_lib.cpp

/*
 * Copyright (C) 2011-2017 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 */

#include "se_tcrypto_common.h"
#include "sgx_tcrypto.h"
#include "se_cpu_feature.h"
#include "se_cdefs.h"

// add a version to tcrypto.
SGX_ACCESS_VERSION(tcrypto, 1)


// SGXSSL's function. register and init cpuid exception handler.
//
extern "C" void init_exception_handler(void);
unsigned long openssl_last_err = 0;

/* Crypto Library Initialization
* Parameters:
*	Return: sgx_status_t  - SGX_SUCCESS or failure as defined sgx_error.h
*	Inputs: uint64_t cpu_feature_indicator - Bit array of host CPU feature bits */
extern "C" sgx_status_t sgx_init_crypto_lib(uint64_t cpu_feature_indicator)
{
    (void)(cpu_feature_indicator);
    
    // prevent linker from optimizing init_exception_handler function.
    // **DON'T REMOVE**
    //
    volatile int dead_code_flag = 0;
    if (dead_code_flag == 1) {
        init_exception_handler();
    }

    return SGX_SUCCESS;
}