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 --- v2: no change --- cmd/Kconfig | 2 +- cmd/Makefile | 1 + cmd/sandbox/Makefile | 3 +++ cmd/sandbox/exception.c | 41 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 46 insertions(+), 1 deletion(-) create mode 100644 cmd/sandbox/Makefile create mode 100644 cmd/sandbox/exception.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index 1595de999b..f9b72449c5 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1682,7 +1682,7 @@ 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 dd86675bf2..5b3400a840 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 0000000000..24df023ece --- /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 0000000000..1aa1d673ae --- /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> -- 2.28.0