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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * The 'exception' command can be used for testing exception handling.
4 *
5 * Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
6 */
7
8#include <command.h>
9
10static int do_sigsegv(struct cmd_tbl *cmdtp, int flag, int argc,
11 char *const argv[])
12{
13 u8 *ptr = NULL;
14
15 *ptr = 0;
16 return CMD_RET_FAILURE;
17}
18
19static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc,
20 char *const argv[])
21{
22#ifdef __powerpc__
23 asm volatile (".long 0xffffffff\n");
24#else
25 asm volatile (".word 0xffff\n");
26#endif
27 return CMD_RET_FAILURE;
28}
29
30static struct cmd_tbl cmd_sub[] = {
31 U_BOOT_CMD_MKENT(sigsegv, CONFIG_SYS_MAXARGS, 1, do_sigsegv,
32 "", ""),
33 U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined,
34 "", ""),
35};
36
37U_BOOT_LONGHELP(exception,
38 "<ex>\n"
39 " The following exceptions are available:\n"
40 " undefined - undefined instruction\n"
41 " sigsegv - illegal memory access\n");
42
43#include <exception.h>