linux-sgx-trts-modified/SampleCode/SampleEnclave/Enclave/Edger8rSyntax/Functions.edl

/*
 * Copyright (C) 2011-2018 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
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */


/* Functions.edl - Samples for function attributes. */

enclave {
    
    /* 
     * Following keywords/attributes are supported for untrusted functions: 
     *      cdecl, stdcall, fastcall, dllimport (only for Windows).
     *      [public] is only supported for the trusted functions.
     * Trusted function will be treated as [private] w/o the [public].
     */

    trusted {

        public void ecall_function_calling_convs(void);
        
        /*
         * [public]:
         *      public ECALL can be called directly in App.
         */
        
        public void ecall_function_public(void);

        /*
         * [private]:
         *      private ECALL cannot be called directly in App.
         */
        
        int ecall_function_private(void);
    
    };

    untrusted {
        
        /*
         * [cdecl]:
         *      tells edger8r the calling convention of the OCALLs is 'cdecl'.
         * [dllimport]:
         *      indicats the OCALL is provided in DLLs.
         *
         * Note: memccpy() is provided by MS system DLL, we don't need to implement it in App side.
         */
        
        [cdecl, dllimport] void *memccpy([in, out, size=len] void *dest, [in, size=len] const void *src, int val, size_t len);
        
        /*
         * [allow]:
         *      OCALL 'ocall_function_allow' can invoke ECALL 'ecall_function_private' in App side. 
         *
         * Note: No ECALL can be called in OCALL w/o [allow].
         */
        
        void ocall_function_allow(void) allow(ecall_function_private);
    
    };

};