ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync/* $Id$ */
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync/** @file
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * tstX86-FpuSaveRestore - Experimenting with saving and restoring FPU.
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync */
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync/*
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * Copyright (C) 2013 Oracle Corporation
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync *
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * available from http://www.virtualbox.org. This file is free software;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * you can redistribute it and/or modify it under the terms of the GNU
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * General Public License (GPL) as published by the Free Software
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync */
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync/*******************************************************************************
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync* Header Files *
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync*******************************************************************************/
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#include <iprt/initterm.h>
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#include <iprt/message.h>
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#include <iprt/string.h>
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#include <iprt/test.h>
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#include <iprt/x86.h>
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsyncDECLASM(void) MyFpuPrepXcpt(void);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsyncDECLASM(void) MyFpuSave(PX86FXSTATE pState);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsyncDECLASM(void) MyFpuStoreEnv(PX86FSTENV32P pEnv);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsyncDECLASM(void) MyFpuRestore(PX86FXSTATE pState);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsyncDECLASM(void) MyFpuLoadEnv(PX86FSTENV32P pEnv);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsyncint main()
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync{
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync RTTEST hTest;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync int rc = RTTestInitAndCreate("tstX86-FpuSaveRestore", &hTest);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync RTTestBanner(hTest);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync RTTestSub(hTest, "CS/DS Selector");
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
694a19c714ec9c163176f2c8d9dd69dd16018a0dvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, "Initial state (0x20 will be subtracted from IP):\n");
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync /* Trigger an exception to make sure we've got something to look at. */
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuPrepXcpt();
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FXSTATE FxState;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuSave(&FxState);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FSTENV32P FpuEnv;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuStoreEnv(&FpuEnv);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#ifdef RT_ARCH_AMD64
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxState.Rsrvd1, FxState.CS, FxState.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#else
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxState.CS, FxState.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#endif
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnv.FPUCS, FpuEnv.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync /* Modify the state a little so we can tell the difference. */
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FXSTATE FxState2;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync FxState2 = FxState;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync FxState2.FPUIP -= 0x20;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FSTENV32P FpuEnv2;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync FpuEnv2 = FpuEnv;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync FpuEnv2.FPUIP -= 0x20;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync /* Just do FXRSTOR. */
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, "Just FXRSTOR:\n");
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuRestore(&FxState2);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FXSTATE FxStateJustRestore;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuSave(&FxStateJustRestore);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FSTENV32P FpuEnvJustRestore;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuStoreEnv(&FpuEnvJustRestore);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#ifdef RT_ARCH_AMD64
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxStateJustRestore.Rsrvd1, FxStateJustRestore.CS, FxStateJustRestore.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#else
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxStateJustRestore.CS, FxStateJustRestore.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#endif
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnvJustRestore.FPUCS, FpuEnvJustRestore.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync /* FXRSTORE + FLDENV */
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, "FXRSTOR first, then FLDENV:\n");
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuRestore(&FxState2);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuLoadEnv(&FpuEnv2);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FXSTATE FxStateRestoreLoad;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuSave(&FxStateRestoreLoad);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FSTENV32P FpuEnvRestoreLoad;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuStoreEnv(&FpuEnvRestoreLoad);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#ifdef RT_ARCH_AMD64
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxStateRestoreLoad.Rsrvd1, FxStateRestoreLoad.CS, FxStateRestoreLoad.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#else
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxStateRestoreLoad.CS, FxStateRestoreLoad.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#endif
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnvRestoreLoad.FPUCS, FpuEnvRestoreLoad.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync /* Reverse the order (FLDENV + FXRSTORE). */
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, "FLDENV first, then FXRSTOR:\n");
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuLoadEnv(&FpuEnv2);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuRestore(&FxState2);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FXSTATE FxStateLoadRestore;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuSave(&FxStateLoadRestore);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync static X86FSTENV32P FpuEnvLoadRestore;
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync MyFpuStoreEnv(&FpuEnvLoadRestore);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#ifdef RT_ARCH_AMD64
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxStateLoadRestore.Rsrvd1, FxStateLoadRestore.CS, FxStateLoadRestore.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#else
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxStateLoadRestore.CS, FxStateLoadRestore.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync#endif
4101de7974ac0eaba9428c06e656e0ecde8b301cvboxsync RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnvLoadRestore.FPUCS, FpuEnvLoadRestore.FPUIP);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync return RTTestSummaryAndDestroy(hTest);
ed882ec1ed01b0a5469d2acd28d0bf52e38c2103vboxsync}