mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-30 19:48:19 +00:00
3a5ec03578
Implement the commands
* exception undefined - execute an illegal instruction
* exception sigsegv - cause a segment violation
Here is a possible output:
=> exception undefined
Illegal instruction
pc = 0x55eb8d0a7575, pc_reloc = 0x57575
Resetting ...
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
42 lines
929 B
C
42 lines
929 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* The 'exception' command can be used for testing exception handling.
|
|
*
|
|
* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
|
|
static int do_sigsegv(struct cmd_tbl *cmdtp, int flag, int argc,
|
|
char *const argv[])
|
|
{
|
|
u8 *ptr = NULL;
|
|
|
|
*ptr = 0;
|
|
return CMD_RET_FAILURE;
|
|
}
|
|
|
|
static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc,
|
|
char *const argv[])
|
|
{
|
|
asm volatile (".word 0xffff\n");
|
|
return CMD_RET_FAILURE;
|
|
}
|
|
|
|
static struct cmd_tbl cmd_sub[] = {
|
|
U_BOOT_CMD_MKENT(sigsegv, CONFIG_SYS_MAXARGS, 1, do_sigsegv,
|
|
"", ""),
|
|
U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined,
|
|
"", ""),
|
|
};
|
|
|
|
static char exception_help_text[] =
|
|
"<ex>\n"
|
|
" The following exceptions are available:\n"
|
|
" undefined - undefined instruction\n"
|
|
" sigsegv - illegal memory access\n"
|
|
;
|
|
|
|
#include <exception.h>
|