From 1c32bb101026eb8f693544824f015a6c3cfefe60 Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Wed, 26 Sep 2018 19:05:58 +0200
Subject: [PATCH] efi_selftest: test handling of exceptions
Test the handling of execptions by trying to execute an undefined
instruction. For 32bit ARM we expect \selftest to be listed as loaded
image.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
lib/efi_selftest/Makefile | 1 +
lib/efi_selftest/efi_selftest_exception.c | 50 +++++++++++++++++++++++
2 files changed, 51 insertions(+)
create mode 100644 lib/efi_selftest/efi_selftest_exception.c
diff --git a/lib/efi_selftest/Makefile b/lib/efi_selftest/Makefile
index 0acd790550..4b1c0bb84b 100644
--- a/lib/efi_selftest/Makefile
+++ b/lib/efi_selftest/Makefile
@@ -21,6 +21,7 @@ efi_selftest_devicepath.o \
efi_selftest_devicepath_util.o \
efi_selftest_events.o \
efi_selftest_event_groups.o \
+efi_selftest_exception.o \
efi_selftest_exitbootservices.o \
efi_selftest_fdt.o \
efi_selftest_gop.o \
diff --git a/lib/efi_selftest/efi_selftest_exception.c b/lib/efi_selftest/efi_selftest_exception.c
new file mode 100644
index 0000000000..2ac1796c3b
--- /dev/null
+++ b/lib/efi_selftest/efi_selftest_exception.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * efi_selftest_exception
+ *
+ * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * Test the handling of execptions by trying to execute an undefined
+ * instruction.
+ */
+
+#include <efi_selftest.h>
+
+/**
+ * undefined_instruction() - try to executed an undefined instruction
+ */
+static void undefined_instruction(void)
+{
+#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
+}
+
+/**
+ * execute() - execute unit test
+ *
+ * Return: EFI_ST_SUCCESS for success
+ */
+static int execute(void)
+{
+ undefined_instruction();
+
+ efi_st_error("An undefined instruction exeption was not raised\n");
+
+ return EFI_ST_FAILURE;
+}
+
+EFI_UNIT_TEST(exception) = {
+ .name = "exception",
+ .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+ .execute = execute,
+ .on_request = true,
+};
--
2.39.5