[PATCH v2 3/4] efi_selftest: implement exception test for sandbox

[Simon Glass]

On Wed, 11 Nov 2020 at 16:30, Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>
> 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 at gmx.de>
> ---
> v2:
>         no change
> ---
>  lib/efi_selftest/efi_selftest_miniapp_exception.c | 2 ++
>  1 file changed, 2 insertions(+)

Reviewed-by: Simon Glass <sjg at chromium.org>

>
> diff --git a/lib/efi_selftest/efi_selftest_miniapp_exception.c b/lib/efi_selftest/efi_selftest_miniapp_exception.c
> index 63c63d75f1..59b7e5100a 100644
> --- a/lib/efi_selftest/efi_selftest_miniapp_exception.c
> +++ b/lib/efi_selftest/efi_selftest_miniapp_exception.c
> @@ -33,6 +33,8 @@ efi_status_t EFIAPI efi_main(efi_handle_t handle,
>         asm volatile (".word 0xe7f7defb\n");
>  #elif defined(CONFIG_RISCV)
>         asm volatile (".word 0xffffffff\n");
> +#elif defined(CONFIG_SANDBOX)
> +       asm volatile (".word 0xffffffff\n");

Does this work on ARM hosts?


>  #elif defined(CONFIG_X86)
>         asm volatile (".word 0xffff\n");
>  #endif
> --
> 2.28.0
>