From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mohammed Gamal Subject: [PATCH] test: Add emulator test for iret instruction Date: Wed, 28 Jul 2010 12:39:01 +0300 Message-ID: <1280309941-13571-1-git-send-email-m.gamal005@gmail.com> Cc: mtosatti@redhat.com, kvm@vger.kernel.org, Mohammed Gamal To: avi@redhat.com Return-path: Received: from mail-ww0-f42.google.com ([74.125.82.42]:43786 "EHLO mail-ww0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751961Ab0G1JjO (ORCPT ); Wed, 28 Jul 2010 05:39:14 -0400 Received: by wwf26 with SMTP id 26so4823928wwf.1 for ; Wed, 28 Jul 2010 02:39:13 -0700 (PDT) Sender: kvm-owner@vger.kernel.org List-ID: This adds a unit test for real mode emulation of the iret instruction Signed-off-by: Mohammed Gamal --- Changes from v1: - Added test for 16-bit iret - Added tests for returned eflags --- kvm/test/x86/realmode.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 79 insertions(+), 0 deletions(-) diff --git a/kvm/test/x86/realmode.c b/kvm/test/x86/realmode.c index bd79348..74456c3 100644 --- a/kvm/test/x86/realmode.c +++ b/kvm/test/x86/realmode.c @@ -865,6 +865,84 @@ void test_pusha_popa() print_serial("Pusha/Popa Test2: PASS\n"); } +void test_iret() +{ + struct regs inregs = { 0 }, outregs; + + MK_INSN(iret32, "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" + ); + + MK_INSN(iret16, "pushfw\n\t" + "pushw %cs\n\t" + "callw 1f\n\t" + "jmp 2f\n\t" + "1: iretw\n\t" + "2:\n\t"); + + MK_INSN(iret_flags32, "pushfl\n\t" + "popl %eax\n\t" + "andl $~0x2, %eax\n\t" + "orl $0xffc08028, %eax\n\t" + "pushl %eax\n\t" + "pushl %cs\n\t" + "call 1f\n\t" + "jmp 2f\n\t" + "1: iret\n\t" + "2:\n\t"); + + MK_INSN(iret_flags16, "pushfw\n\t" + "popw %ax\n\t" + "and $~0x2, %ax\n\t" + "or $0x8028, %ax\n\t" + "pushw %ax\n\t" + "pushw %cs\n\t" + "callw 1f\n\t" + "jmp 2f\n\t" + "1: iretw\n\t" + "2:\n\t"); + + exec_in_big_real_mode(&inregs, &outregs, + insn_iret32, + insn_iret32_end - insn_iret32); + + if (!regs_equal(&inregs, &outregs, 0)) + print_serial("iret Test 1: FAIL\n"); + else + print_serial("iret Test 1: PASS\n"); + + exec_in_big_real_mode(&inregs, &outregs, + insn_iret16, + insn_iret16_end - insn_iret16); + + if (!regs_equal(&inregs, &outregs, 0)) + print_serial("iret Test 2: FAIL\n"); + else + print_serial("iret Test 2: PASS\n"); + + exec_in_big_real_mode(&inregs, &outregs, + insn_iret_flags32, + insn_iret_flags32_end - insn_iret_flags32); + + if (!regs_equal(&inregs, &outregs, R_AX)) + print_serial("iret Test 3: FAIL\n"); + else + print_serial("iret Test 3: PASS\n"); + + exec_in_big_real_mode(&inregs, &outregs, + insn_iret_flags16, + insn_iret_flags16_end - insn_iret_flags16); + + if (!regs_equal(&inregs, &outregs, R_AX)) + print_serial("iret Test 4: FAIL\n"); + else + print_serial("iret Test 4: PASS\n"); +} + void realmode_start(void) { test_null(); @@ -886,6 +964,7 @@ void realmode_start(void) /* long jmp test uses call near so test it after testing call */ test_long_jmp(); test_xchg(); + test_iret(); exit(0); } -- 1.7.0.4