efi_selftest: use standalone UEFI program for exception

To fully demonstrate crash outputs for UEFI images provide a standalone
UEFI application that tries to invoke an illegal opcode.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/efi_selftest/efi_selftest_miniapp_exception.c b/lib/efi_selftest/efi_selftest_miniapp_exception.c
new file mode 100644
index 0000000000..63c63d75f1
--- /dev/null
+++ b/lib/efi_selftest/efi_selftest_miniapp_exception.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * efi_selftest_miniapp_return
+ *
+ * Copyright (c) 2019 Heinrich Schuchardt
+ *
+ * This EFI application triggers an exception.
+ */
+
+#include <common.h>
+#include <efi_api.h>
+
+/*
+ * Entry point of the EFI application.
+ *
+ * @handle	handle of the loaded image
+ * @systable	system table
+ * @return	status code
+ */
+efi_status_t EFIAPI efi_main(efi_handle_t handle,
+			     struct efi_system_table *systable)
+{
+	struct efi_simple_text_output_protocol *con_out = systable->con_out;
+
+	con_out->output_string(con_out,
+			       L"EFI application triggers exception.\n");
+
+#if defined(CONFIG_ARM)
+	/*
+	 * 0xe7f...f.	is undefined in ARM mode
+	 * 0xde..	is undefined in Thumb mode
+	 */
+	asm volatile (".word 0xe7f7defb\n");
+#elif defined(CONFIG_RISCV)
+	asm volatile (".word 0xffffffff\n");
+#elif defined(CONFIG_X86)
+	asm volatile (".word 0xffff\n");
+#endif
+	con_out->output_string(con_out, L"Exception not triggered.\n");
+	return EFI_ABORTED;
+}