1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * The 'exception' command can be used for testing exception handling.
4 *
5 * Copyright (c) 2018, Heinrich Schuchardt <xypron.glpk@gmx.de>
6 */
7
8 #include <common.h>
9 #include <command.h>
10
do_undefined(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])11 static int do_undefined(cmd_tbl_t *cmdtp, int flag, int argc,
12 char * const argv[])
13 {
14 /*
15 * 0xe7f...f. is undefined in ARM mode
16 * 0xde.. is undefined in Thumb mode
17 */
18 asm volatile (".word 0xe7f7defb\n");
19 return CMD_RET_FAILURE;
20 }
21
22 static cmd_tbl_t cmd_sub[] = {
23 U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined,
24 "", ""),
25 };
26
27 static char exception_help_text[] =
28 "<ex>\n"
29 " The following exceptions are available:\n"
30 " undefined - undefined instruction\n"
31 ;
32
33 #include <exception.h>
34