summaryrefslogtreecommitdiff
path: root/cmd/x86
diff options
context:
space:
mode:
authorHeinrich Schuchardt <xypron.glpk@gmx.de>2018-12-26 17:20:35 +0100
committerTom Rini <trini@konsulko.com>2019-04-22 12:06:39 -0400
commitdab8788a8cadaa18a44001f98fa959fc672fff4f (patch)
tree2ede1f0e809092149aaa422970fe39721ed787b0 /cmd/x86
parentc986aa624b6a0a627f029b44945b60979e25d109 (diff)
cmd: add exception command
The 'exception' command allows to test exception handling. This implementation supports ARM, x86, RISC-V and the following exceptions: * 'breakpoint' - prefetch abort exception (ARM 32bit only) * 'unaligned' - data abort exception (ARM only) * 'undefined' - undefined instruction exception Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'cmd/x86')
-rw-r--r--cmd/x86/Makefile1
-rw-r--r--cmd/x86/exception.c29
2 files changed, 30 insertions, 0 deletions
diff --git a/cmd/x86/Makefile b/cmd/x86/Makefile
index bcc6d06582..707161440d 100644
--- a/cmd/x86/Makefile
+++ b/cmd/x86/Makefile
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0+
obj-y += mtrr.o
+obj-$(CONFIG_CMD_EXCEPTION) += exception.o
obj-$(CONFIG_HAVE_FSP) += fsp.o
diff --git a/cmd/x86/exception.c b/cmd/x86/exception.c
new file mode 100644
index 0000000000..ade1e2ea92
--- /dev/null
+++ b/cmd/x86/exception.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * The 'exception' command can be used for testing exception handling.
+ *
+ * Copyright (c) 2018, Heinrich Schuchardt <xypron.glpk@gmx.de>
+ */
+
+#include <common.h>
+#include <command.h>
+
+static int do_undefined(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ asm volatile (".word 0xffff\n");
+ return CMD_RET_FAILURE;
+}
+
+static cmd_tbl_t cmd_sub[] = {
+ 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"
+ ;
+
+#include <exception.h>