libtests/dl13/dl13-o1.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * Copyright (C) 2024 On-Line Applications Research (OAR). All rights reserved.
0005  *
0006  * Redistribution and use in source and binary forms, with or without
0007  * modification, are permitted provided that the following conditions
0008  * are met:
0009  * 1. Redistributions of source code must retain the above copyright
0010  *    notice, this list of conditions and the following disclaimer.
0011  * 2. Redistributions in binary form must reproduce the above copyright
0012  *    notice, this list of conditions and the following disclaimer in the
0013  *    documentation and/or other materials provided with the distribution.
0014  *
0015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0025  * POSSIBILITY OF SUCH DAMAGE.
0026  */
0027
0028 #include "dl13-arm_mode.h"
0029
0030 #include <rtems/test-printer.h>
0031
0032 #define printf(...) rtems_printf(&rtems_test_printer, __VA_ARGS__);
0033
0034 /*
0035  * Yes a decl in the source. This is a modules main and I could not find which
0036  * header main is defined in.
0037  */
0038 void dl_o1_func (void);
0039 void dl_o1_func (void)
0040 {
0041   printf("About to call arm_mode_func from %s\n", __func__);
0042
0043   /*
0044    * Non-trailing calls to arm_mode_func generate an offset prefix and BLX via
0045    * THM_PC22
0046    */
0047   arm_mode_func();
0048
0049   printf("About to call arm_mode_func from %s as a trailing call\n", __func__);
0050
0051   /*
0052    * Trailing calls to arm_mode_func generate a b.w instruction via THM_JUMP24
0053    * relocation
0054    */
0055   arm_mode_func();
0056
0057   return;
0058 }