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- /*
- * Copyright (c) 2016, Linaro Limited
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. 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.
- *
- * 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 HOLDER 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.
- */
- #include <err.h>
- #include <stdio.h>
- #include <string.h>
- /* OP-TEE TEE client API (built by optee_client) */
- #include <tee_client_api.h>
- /* For the UUID (found in the TA's h-file(s)) */
- #include <hello_world_ta.h>
- int main(void)
- {
- TEEC_Result res;
- TEEC_Context ctx;
- TEEC_Session sess;
- TEEC_Operation op;
- TEEC_UUID uuid = TA_HELLO_WORLD_UUID;
- uint32_t err_origin;
- /* Initialize a context connecting us to the TEE */
- res = TEEC_InitializeContext(NULL, &ctx);
- if (res != TEEC_SUCCESS)
- errx(1, "TEEC_InitializeContext failed with code 0x%x", res);
- /*
- * Open a session to the "hello world" TA, the TA will print "hello
- * world!" in the log when the session is created.
- */
- res = TEEC_OpenSession(&ctx, &sess, &uuid,
- TEEC_LOGIN_PUBLIC, NULL, NULL, &err_origin);
- if (res != TEEC_SUCCESS)
- errx(1, "TEEC_Opensession failed with code 0x%x origin 0x%x",
- res, err_origin);
- /*
- * Execute a function in the TA by invoking it, in this case
- * we're incrementing a number.
- *
- * The value of command ID part and how the parameters are
- * interpreted is part of the interface provided by the TA.
- */
- /* Clear the TEEC_Operation struct */
- memset(&op, 0, sizeof(op));
- /*
- * Prepare the argument. Pass a value in the first parameter,
- * the remaining three parameters are unused.
- */
- op.paramTypes = TEEC_PARAM_TYPES(TEEC_VALUE_INOUT, TEEC_NONE,
- TEEC_NONE, TEEC_NONE);
- op.params[0].value.a = 42;
- /*
- * TA_HELLO_WORLD_CMD_INC_VALUE is the actual function in the TA to be
- * called.
- */
- printf("Invoking TA to increment %d\n", op.params[0].value.a);
- res = TEEC_InvokeCommand(&sess, TA_HELLO_WORLD_CMD_INC_VALUE, &op,
- &err_origin);
- if (res != TEEC_SUCCESS)
- errx(1, "TEEC_InvokeCommand failed with code 0x%x origin 0x%x",
- res, err_origin);
- printf("TA incremented value to %d\n", op.params[0].value.a);
- /*
- * We're done with the TA, close the session and
- * destroy the context.
- *
- * The TA will print "Goodbye!" in the log when the
- * session is closed.
- */
- TEEC_CloseSession(&sess);
- TEEC_FinalizeContext(&ctx);
- return 0;
- }
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