On 07/28/2010 07:21 AM, Avi Kivity wrote:
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@xxxxxxxxx> --- 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).
Also add tests that set bits that must be zero (and checks that IRET clears them in eflags) or clears bit 1 and sees that IRET sets it.
-- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
