mirror of
https://github.com/brain-hackers/u-boot-brain
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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+
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/*
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* The 'exception' command can be used for testing exception handling.
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*
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* Copyright (c) 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
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*/
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#include <common.h>
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#include <command.h>
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static int do_sigsegv(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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u8 *ptr = NULL;
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*ptr = 0;
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return CMD_RET_FAILURE;
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}
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static int do_undefined(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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asm volatile (".word 0xffff\n");
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return CMD_RET_FAILURE;
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}
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static struct cmd_tbl cmd_sub[] = {
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U_BOOT_CMD_MKENT(sigsegv, CONFIG_SYS_MAXARGS, 1, do_sigsegv,
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"", ""),
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U_BOOT_CMD_MKENT(undefined, CONFIG_SYS_MAXARGS, 1, do_undefined,
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"", ""),
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};
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static char exception_help_text[] =
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"<ex>\n"
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" The following exceptions are available:\n"
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" undefined - undefined instruction\n"
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" sigsegv - illegal memory access\n"
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;
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#include <exception.h>
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