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.gamal...@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).
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.
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