u-boot/lib/efi_selftest/efi_selftest_miniapp_exception.c
Heinrich Schuchardt 04cc7914f2 efi_selftest: implement exception test for sandbox
Provide a unit test that causes an illegal instruction to occur.

The test can be run with the following commands:

    => setenv efi_selftest exception
    => bootefi selftest

This might be the output:

    Executing 'exception'
    EFI application triggers exception.
    Illegal instruction
    pc = 0x1444d016, pc_reloc = 0xffffaa078e8dd016
    UEFI image [0x0000000000000000:0xffffffffffffffff] '/\selftest'
    UEFI image [0x000000001444b000:0x0000000014451fff] pc=0x2016 '/bug.efi'
    Resetting ...

It would tell us that the exception was triggered by an instruction
0x2016 bytes after the load address of the binary with filename /bug.efi.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2020-12-13 07:58:17 -07:00

43 lines
1 KiB
C

// 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_SANDBOX)
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;
}