Re: [PATCH] test: Add emulator test for iret instruction

[Avi Kivity <avi@redhat.com>]

  On 07/28/2010 02:22 AM, Mohammed Gamal wrote:
> This adds a unit test for real mode emulation of the iret instruction
>
> Signed-off-by: Mohammed Gamal<m.gamal005@gmail.com>
> ---
>   kvm/test/x86/realmode.c |   23 +++++++++++++++++++++++
>   1 files changed, 23 insertions(+), 0 deletions(-)
>
> diff --git a/kvm/test/x86/realmode.c b/kvm/test/x86/realmode.c
> index bd79348..16716cc 100644
> --- a/kvm/test/x86/realmode.c
> +++ b/kvm/test/x86/realmode.c
> @@ -865,6 +865,28 @@ void test_pusha_popa()
>   		print_serial("Pusha/Popa Test2: PASS\n");
>   }
>
> +void test_iret()
> +{
> +	struct regs inregs = { 0 }, outregs;
> +
> +	MK_INSN(iret, "pushf\n\t"
> +		      "pushl %cs\n\t"
> +		      "call 1f\n\t" /* a near call will push eip onto the stack */
> +		      "jmp 2f\n\t"
> +		      "1:iret\n\t"
> +		      "2:\n\t"
> +		     );
> +
> +	exec_in_big_real_mode(&inregs,&outregs,
> +			      insn_iret,
> +			      insn_iret_end - insn_iret);
> +
> +	if (!regs_equal(&inregs,&outregs, 0))
> +		print_serial("iret Test 1: FAIL\n");
> +	else
> +		print_serial("iret Test 1: PASS\n");
> +}
> +

This tests 32-bit iret, please test 16-bit iret as well (pushfw, pushw 
cs, callw, iretw).

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.