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efi_selftest: test handling of exceptions

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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>
This commit is contained in:
Heinrich Schuchardt 2018-09-26 19:05:58 +02:00 committed by Alexander Graf
parent f6e7b65380
commit 1c32bb1010
2 changed files with 51 additions and 0 deletions
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1
lib/efi_selftest/Makefile
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@ -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 \

50
lib/efi_selftest/efi_selftest_exception.c Normal file
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@ -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,
};