| 1 | /* $Id: tstX86-FpuSaveRestore.cpp 62776 2016-07-31 21:58:30Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * tstX86-FpuSaveRestore - Experimenting with saving and restoring FPU.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2013-2016 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 |
|
|---|
| 19 | /*********************************************************************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *********************************************************************************************************************************/
|
|---|
| 22 | #include <iprt/initterm.h>
|
|---|
| 23 | #include <iprt/message.h>
|
|---|
| 24 | #include <iprt/string.h>
|
|---|
| 25 | #include <iprt/test.h>
|
|---|
| 26 | #include <iprt/x86.h>
|
|---|
| 27 |
|
|---|
| 28 | DECLASM(void) MyFpuPrepXcpt(void);
|
|---|
| 29 | DECLASM(void) MyFpuSave(PX86FXSTATE pState);
|
|---|
| 30 | DECLASM(void) MyFpuStoreEnv(PX86FSTENV32P pEnv);
|
|---|
| 31 | DECLASM(void) MyFpuRestore(PX86FXSTATE pState);
|
|---|
| 32 | DECLASM(void) MyFpuLoadEnv(PX86FSTENV32P pEnv);
|
|---|
| 33 |
|
|---|
| 34 | int main()
|
|---|
| 35 | {
|
|---|
| 36 | RTTEST hTest;
|
|---|
| 37 | int rc = RTTestInitAndCreate("tstX86-FpuSaveRestore", &hTest);
|
|---|
| 38 | if (RT_FAILURE(rc))
|
|---|
| 39 | return RTEXITCODE_FAILURE;
|
|---|
| 40 | RTTestBanner(hTest);
|
|---|
| 41 |
|
|---|
| 42 | RTTestSub(hTest, "CS/DS Selector");
|
|---|
| 43 |
|
|---|
| 44 | RTTestIPrintf(RTTESTLVL_ALWAYS, "Initial state (0x20 will be subtracted from IP):\n");
|
|---|
| 45 | /* Trigger an exception to make sure we've got something to look at. */
|
|---|
| 46 | MyFpuPrepXcpt();
|
|---|
| 47 | static X86FXSTATE FxState;
|
|---|
| 48 | MyFpuSave(&FxState);
|
|---|
| 49 | static X86FSTENV32P FpuEnv;
|
|---|
| 50 | MyFpuStoreEnv(&FpuEnv);
|
|---|
| 51 | #ifdef RT_ARCH_AMD64
|
|---|
| 52 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxState.Rsrvd1, FxState.CS, FxState.FPUIP);
|
|---|
| 53 | #else
|
|---|
| 54 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxState.CS, FxState.FPUIP);
|
|---|
| 55 | #endif
|
|---|
| 56 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnv.FPUCS, FpuEnv.FPUIP);
|
|---|
| 57 |
|
|---|
| 58 | /* Modify the state a little so we can tell the difference. */
|
|---|
| 59 | static X86FXSTATE FxState2;
|
|---|
| 60 | FxState2 = FxState;
|
|---|
| 61 | FxState2.FPUIP -= 0x20;
|
|---|
| 62 | static X86FSTENV32P FpuEnv2;
|
|---|
| 63 | FpuEnv2 = FpuEnv;
|
|---|
| 64 | FpuEnv2.FPUIP -= 0x20;
|
|---|
| 65 |
|
|---|
| 66 | /* Just do FXRSTOR. */
|
|---|
| 67 | RTTestIPrintf(RTTESTLVL_ALWAYS, "Just FXRSTOR:\n");
|
|---|
| 68 | MyFpuRestore(&FxState2);
|
|---|
| 69 |
|
|---|
| 70 | static X86FXSTATE FxStateJustRestore;
|
|---|
| 71 | MyFpuSave(&FxStateJustRestore);
|
|---|
| 72 | static X86FSTENV32P FpuEnvJustRestore;
|
|---|
| 73 | MyFpuStoreEnv(&FpuEnvJustRestore);
|
|---|
| 74 | #ifdef RT_ARCH_AMD64
|
|---|
| 75 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxStateJustRestore.Rsrvd1, FxStateJustRestore.CS, FxStateJustRestore.FPUIP);
|
|---|
| 76 | #else
|
|---|
| 77 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxStateJustRestore.CS, FxStateJustRestore.FPUIP);
|
|---|
| 78 | #endif
|
|---|
| 79 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnvJustRestore.FPUCS, FpuEnvJustRestore.FPUIP);
|
|---|
| 80 |
|
|---|
| 81 |
|
|---|
| 82 | /* FXRSTORE + FLDENV */
|
|---|
| 83 | RTTestIPrintf(RTTESTLVL_ALWAYS, "FXRSTOR first, then FLDENV:\n");
|
|---|
| 84 | MyFpuRestore(&FxState2);
|
|---|
| 85 | MyFpuLoadEnv(&FpuEnv2);
|
|---|
| 86 |
|
|---|
| 87 | static X86FXSTATE FxStateRestoreLoad;
|
|---|
| 88 | MyFpuSave(&FxStateRestoreLoad);
|
|---|
| 89 | static X86FSTENV32P FpuEnvRestoreLoad;
|
|---|
| 90 | MyFpuStoreEnv(&FpuEnvRestoreLoad);
|
|---|
| 91 | #ifdef RT_ARCH_AMD64
|
|---|
| 92 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxStateRestoreLoad.Rsrvd1, FxStateRestoreLoad.CS, FxStateRestoreLoad.FPUIP);
|
|---|
| 93 | #else
|
|---|
| 94 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxStateRestoreLoad.CS, FxStateRestoreLoad.FPUIP);
|
|---|
| 95 | #endif
|
|---|
| 96 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnvRestoreLoad.FPUCS, FpuEnvRestoreLoad.FPUIP);
|
|---|
| 97 |
|
|---|
| 98 | /* Reverse the order (FLDENV + FXRSTORE). */
|
|---|
| 99 | RTTestIPrintf(RTTESTLVL_ALWAYS, "FLDENV first, then FXRSTOR:\n");
|
|---|
| 100 | MyFpuLoadEnv(&FpuEnv2);
|
|---|
| 101 | MyFpuRestore(&FxState2);
|
|---|
| 102 |
|
|---|
| 103 | static X86FXSTATE FxStateLoadRestore;
|
|---|
| 104 | MyFpuSave(&FxStateLoadRestore);
|
|---|
| 105 | static X86FSTENV32P FpuEnvLoadRestore;
|
|---|
| 106 | MyFpuStoreEnv(&FpuEnvLoadRestore);
|
|---|
| 107 | #ifdef RT_ARCH_AMD64
|
|---|
| 108 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState IP=%#06x%04x%08x\n", FxStateLoadRestore.Rsrvd1, FxStateLoadRestore.CS, FxStateLoadRestore.FPUIP);
|
|---|
| 109 | #else
|
|---|
| 110 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FxState CS:IP=%#06x:%#010x\n", FxStateLoadRestore.CS, FxStateLoadRestore.FPUIP);
|
|---|
| 111 | #endif
|
|---|
| 112 | RTTestIPrintf(RTTESTLVL_ALWAYS, " FpuEnv CS:IP=%#06x:%#010x\n", FpuEnvLoadRestore.FPUCS, FpuEnvLoadRestore.FPUIP);
|
|---|
| 113 |
|
|---|
| 114 |
|
|---|
| 115 | return RTTestSummaryAndDestroy(hTest);
|
|---|
| 116 | }
|
|---|
