diff options
| author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-11-12 00:29:57 +0100 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2020-12-13 07:58:17 -0700 |
| commit | 3a5ec0357868b384d43af93d8a20e4c85b00586c (patch) | |
| tree | 90e6ed3aa24df585c060c2c83a6c649d76fef122 /cmd | |
| parent | b46f30a378673a5c789d145c1d8d0d76312714d8 (diff) | |
| download | u-boot-3a5ec0357868b384d43af93d8a20e4c85b00586c.zip u-boot-3a5ec0357868b384d43af93d8a20e4c85b00586c.tar.gz u-boot-3a5ec0357868b384d43af93d8a20e4c85b00586c.tar.bz2 | |
cmd: sandbox: implement exception command
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>
Diffstat (limited to 'cmd')
| -rw-r--r-- | cmd/Kconfig | 2 | ||||
| -rw-r--r-- | cmd/Makefile | 1 | ||||
| -rw-r--r-- | cmd/sandbox/Makefile | 3 | ||||
| -rw-r--r-- | cmd/sandbox/exception.c | 41 |
4 files changed, 46 insertions, 1 deletions
diff --git a/cmd/Kconfig b/cmd/Kconfig index 98cf543..c853ce7 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1691,7 +1691,7 @@ config CMD_EFIDEBUG config CMD_EXCEPTION bool "exception - raise exception" - depends on ARM || RISCV || X86 + depends on ARM || RISCV || SANDBOX || X86 help Enable the 'exception' command which allows to raise an exception. diff --git a/cmd/Makefile b/cmd/Makefile index dd86675..5b3400a 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -193,6 +193,7 @@ obj-$(CONFIG_CMD_AVB) += avb.o obj-$(CONFIG_ARM) += arm/ obj-$(CONFIG_RISCV) += riscv/ +obj-$(CONFIG_SANDBOX) += sandbox/ obj-$(CONFIG_X86) += x86/ obj-$(CONFIG_ARCH_MVEBU) += mvebu/ diff --git a/cmd/sandbox/Makefile b/cmd/sandbox/Makefile new file mode 100644 index 0000000..24df023 --- /dev/null +++ b/cmd/sandbox/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0+ + +obj-$(CONFIG_CMD_EXCEPTION) += exception.o diff --git a/cmd/sandbox/exception.c b/cmd/sandbox/exception.c new file mode 100644 index 0000000..1aa1d67 --- /dev/null +++ b/cmd/sandbox/exception.c @@ -0,0 +1,41 @@ +// 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> |