0545e9dc6d
commit d1edce71135cc6d98c0a4b5729774542b676e769 Author: sophgo-forum-service <forum_service@sophgo.com> Date: Fri Mar 15 16:07:33 2024 +0800 [fix] recommend using ssh method to clone repo. [fix] fix sensor driver repo branch name.
62 lines
1.5 KiB
C
62 lines
1.5 KiB
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) 2018, 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_unaligned(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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/*
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* The LDRD instruction requires the data source to be four byte aligned
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* even if strict alignment fault checking is disabled in the system
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* control register.
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*/
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asm volatile (
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"MOV r5, sp\n"
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"ADD r5, #1\n"
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"LDRD r6, r7, [r5]\n");
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return CMD_RET_FAILURE;
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}
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static int do_breakpoint(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 ("BKPT #123\n");
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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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/*
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* 0xe7f...f. is undefined in ARM mode
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* 0xde.. is undefined in Thumb mode
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*/
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asm volatile (".word 0xe7f7defb\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(breakpoint, CONFIG_SYS_MAXARGS, 1, do_breakpoint,
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"", ""),
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U_BOOT_CMD_MKENT(unaligned, CONFIG_SYS_MAXARGS, 1, do_unaligned,
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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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" breakpoint - prefetch abort\n"
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" unaligned - data abort\n"
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" undefined - undefined instruction\n"
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;
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#include <exception.h>
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