efi_selftest: use standalone UEFI program for exception

[oweals/u-boot.git] / lib / efi_selftest / efi_selftest_miniapp_exception.c

diff --git a/lib/efi_selftest/efi_selftest_miniapp_exception.c b/lib/efi_selftest/efi_selftest_miniapp_exception.c
new file mode 100644 (file)
index 0000000..63c63d7
--- /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;
+}