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// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_exception
*
* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* Test the handling of exceptions 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 exception 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,
};
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