| 1 | ; $Id: cidet-appA.asm 53563 2014-12-18 02:31:37Z vboxsync $
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| 2 | ;; @file
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| 3 | ; CPU Instruction Decoding & Execution Tests - Ring-3 Driver Application, Assembly Code.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2009-2014 Oracle Corporation
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| 8 | ;
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| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | ; available from http://www.virtualbox.org. This file is free software;
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| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 12 | ; General Public License (GPL) as published by the Free Software
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| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | ;
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| 17 | ; The contents of this file may alternatively be used under the terms
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| 18 | ; of the Common Development and Distribution License Version 1.0
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| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 21 | ; CDDL are applicable instead of those of the GPL.
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| 22 | ;
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| 23 | ; You may elect to license modified versions of this file under the
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| 24 | ; terms and conditions of either the GPL or the CDDL or both.
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| 25 | ;
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| 26 |
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| 27 |
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| 28 | ;*******************************************************************************
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| 29 | ;* Header Files *
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| 30 | ;*******************************************************************************
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| 31 | %include "iprt/asmdefs.mac"
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| 32 | %include "iprt/x86.mac"
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| 33 | %include "cidet.mac"
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| 34 |
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| 35 |
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| 36 | ;*******************************************************************************
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| 37 | ;* Global Variables *
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| 38 | ;*******************************************************************************
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| 39 | %ifdef RT_ARCH_X86
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| 40 | ;; Used by CidetAppSaveAndRestoreCtx when we have a tricky target stack.
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| 41 | g_uTargetEip dd 0
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| 42 | g_uTargetCs dw 0
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| 43 | %endif
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| 44 |
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| 45 |
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| 46 | ;;
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| 47 | ; ASSUMES that it's called and the EIP/RIP is found on the stack.
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| 48 | ;
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| 49 | ; @param pSaveCtx ds:xCX The context to save; DS, xDX and xCX have
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| 50 | ; already been saved by the caller.
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| 51 | ; @param pRestoreCtx ds:xDX The context to restore.
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| 52 | ;
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| 53 | BEGINPROC CidetAppSaveAndRestoreCtx
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| 54 | ;
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| 55 | ; Save the stack pointer and program counter first so we can later
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| 56 | ; bypass this step if we need to.
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| 57 | ;
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| 58 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xAX * 8], xAX ; need scratch register.
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| 59 | lea xAX, [xSP + xCB]
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| 60 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xSP * 8], xAX
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| 61 | mov word [xCX + CIDETCPUCTX.aSRegs + X86_SREG_SS * 2], ss
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| 62 | mov word [xCX + CIDETCPUCTX.aSRegs + X86_SREG_CS * 2], cs
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| 63 | mov xAX, [xSP]
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| 64 | mov [xCX + CIDETCPUCTX.rip], xAX
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| 65 | jmp CidetAppSaveAndRestoreCtx_1
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| 66 |
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| 67 | GLOBALNAME CidetAppSaveAndRestoreCtx_NoSsSpCsIp
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| 68 | mov [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xAX * 8], xAX
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| 69 | CidetAppSaveAndRestoreCtx_1:
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| 70 |
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| 71 | ; Flags.
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| 72 | %ifdef RT_ARCH_AMD64
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| 73 | pushfq
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| 74 | %else
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| 75 | pushfd
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| 76 | %endif
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| 77 | pop xAX
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| 78 | mov [xCX + CIDETCPUCTX.rfl], xAX
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| 79 |
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| 80 | ; Segment registers.
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| 81 | mov word [xCX + CIDETCPUCTX.aSRegs + X86_SREG_ES * 2], es
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| 82 | mov word [xCX + CIDETCPUCTX.aSRegs + X86_SREG_FS * 2], fs
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| 83 | mov word [xCX + CIDETCPUCTX.aSRegs + X86_SREG_GS * 2], gs
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| 84 |
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| 85 | ; Remaining GPRs.
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| 86 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xBX * 8], xBX
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| 87 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xBP * 8], xBP
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| 88 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xSI * 8], xSI
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| 89 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xDI * 8], xDI
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| 90 | %ifdef RT_ARCH_AMD64
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| 91 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x8 * 8], r8
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| 92 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x9 * 8], r9
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| 93 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x10 * 8], r10
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| 94 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x11 * 8], r11
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| 95 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x12 * 8], r12
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| 96 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x13 * 8], r13
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| 97 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x14 * 8], r14
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| 98 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x15 * 8], r15
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| 99 | xor eax, eax
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| 100 | mov [xCX + CIDETCPUCTX.cr0], rax
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| 101 | mov [xCX + CIDETCPUCTX.cr2], rax
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| 102 | mov [xCX + CIDETCPUCTX.cr3], rax
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| 103 | mov [xCX + CIDETCPUCTX.cr4], rax
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| 104 | mov [xCX + CIDETCPUCTX.cr8], rax
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| 105 | %else
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| 106 | xor eax, eax
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| 107 | mov [xCX + CIDETCPUCTX.rfl + 4], eax
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| 108 | mov [xCX + CIDETCPUCTX.rip + 4], eax
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| 109 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xAX * 8 + 4], eax
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| 110 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xCX * 8 + 4], eax
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| 111 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xDX * 8 + 4], eax
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| 112 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xBX * 8 + 4], eax
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| 113 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xSP * 8 + 4], eax
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| 114 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xBP * 8 + 4], eax
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| 115 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xSI * 8 + 4], eax
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| 116 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xDI * 8 + 4], eax
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| 117 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x8 * 8 ], eax
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| 118 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x8 * 8 + 4], eax
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| 119 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x9 * 8 ], eax
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| 120 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x9 * 8 + 4], eax
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| 121 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x10 * 8 ], eax
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| 122 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x10 * 8 + 4], eax
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| 123 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x11 * 8 ], eax
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| 124 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x11 * 8 + 4], eax
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| 125 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x12 * 8 ], eax
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| 126 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x12 * 8 + 4], eax
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| 127 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x13 * 8 ], eax
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| 128 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x13 * 8 + 4], eax
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| 129 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x14 * 8 ], eax
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| 130 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x14 * 8 + 4], eax
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| 131 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x15 * 8 ], eax
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| 132 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_x15 * 8 + 4], eax
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| 133 | mov [xCX + CIDETCPUCTX.cr0 ], eax
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| 134 | mov [xCX + CIDETCPUCTX.cr0 + 4], eax
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| 135 | mov [xCX + CIDETCPUCTX.cr2 ], eax
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| 136 | mov [xCX + CIDETCPUCTX.cr2 + 4], eax
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| 137 | mov [xCX + CIDETCPUCTX.cr3 ], eax
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| 138 | mov [xCX + CIDETCPUCTX.cr3 + 4], eax
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| 139 | mov [xCX + CIDETCPUCTX.cr4 ], eax
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| 140 | mov [xCX + CIDETCPUCTX.cr4 + 4], eax
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| 141 | mov [xCX + CIDETCPUCTX.cr8 ], eax
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| 142 | mov [xCX + CIDETCPUCTX.cr8 + 4], eax
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| 143 | %endif
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| 144 | mov [xCX + CIDETCPUCTX.tr], ax
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| 145 | mov [xCX + CIDETCPUCTX.ldtr], ax
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| 146 |
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| 147 | ;
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| 148 | ; Restore the other state (pointer in xDX).
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| 149 | ;
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| 150 | NAME(CidetAppSaveAndRestoreCtx_Restore):
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| 151 |
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| 152 | ; Restore ES, FS, and GS.
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| 153 | mov es, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_ES * 2]
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| 154 | mov fs, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_FS * 2]
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| 155 | mov gs, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_GS * 2]
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| 156 |
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| 157 | ; Restore most GPRs (except xCX, xAX and xSP).
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| 158 | mov xCX, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xCX * 8]
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| 159 | mov xBX, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xBX * 8]
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| 160 | mov xBP, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xBP * 8]
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| 161 | mov xSI, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xSI * 8]
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| 162 | mov xDI, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xDI * 8]
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| 163 | %ifdef RT_ARCH_AMD64
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| 164 | mov r8, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x8 * 8]
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| 165 | mov r9, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x9 * 8]
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| 166 | mov r10, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x10 * 8]
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| 167 | mov r11, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x11 * 8]
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| 168 | mov r12, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x12 * 8]
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| 169 | mov r13, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x13 * 8]
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| 170 | mov r14, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x14 * 8]
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| 171 | mov r15, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_x15 * 8]
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| 172 | %endif
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| 173 |
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| 174 | %ifdef RT_ARCH_AMD64
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| 175 | ; Create an iret frame which restores SS:RSP, RFLAGS, and CS:RIP.
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| 176 | movzx eax, word [xDX + CIDETCPUCTX.aSRegs + X86_SREG_SS * 2]
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| 177 | push xAX
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| 178 | push qword [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xSP * 8]
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| 179 | push qword [xDX + CIDETCPUCTX.rfl]
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| 180 | movzx eax, word [xDX + CIDETCPUCTX.aSRegs + X86_SREG_CS * 2]
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| 181 | push xAX
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| 182 | push qword [xDX + CIDETCPUCTX.rip]
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| 183 |
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| 184 | ; Restore DS, xAX and xDX then do the iret.
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| 185 | mov ds, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_DS * 2]
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| 186 | mov xAX, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xAX * 8]
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| 187 | mov xDX, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xDX * 8]
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| 188 | iretq
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| 189 | %else
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| 190 | ; In 32-bit mode iret doesn't restore CS:ESP for us, so we have to
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| 191 | ; make a choice whether the SS:ESP is more important than EFLAGS.
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| 192 | cmp byte [xDX + CIDETCPUCTX.fTrickyStack], 0
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| 193 | jne .tricky_stack
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| 194 |
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| 195 | mov ss, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_SS * 2]
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| 196 | mov xSP, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xSP * 8]
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| 197 |
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| 198 | push dword [xDX + CIDETCPUCTX.rfl] ; iret frame
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| 199 | movzx eax, word [xDX + CIDETCPUCTX.aSRegs + X86_SREG_CS * 2] ; iret frame
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| 200 | push xAX ; iret frame
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| 201 | push dword [xDX + CIDETCPUCTX.rip] ; iret frame
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| 202 |
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| 203 | mov xAX, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xAX * 8]
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| 204 | mov ds, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_DS * 2]
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| 205 | mov xDX, [cs:xDX + CIDETCPUCTX.aGRegs + X86_GREG_xDX * 8]
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| 206 | iretd
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| 207 |
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| 208 | .tricky_stack:
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| 209 | mov xAX, [xDX + CIDETCPUCTX.rip]
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| 210 | mov [g_uTargetEip], xAX
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| 211 | mov ax, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_CS * 2]
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| 212 | mov [g_uTargetCs], ax
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| 213 | push dword [xDX + CIDETCPUCTX.rfl]
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| 214 | popfd
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| 215 | mov ss, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_SS * 2]
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| 216 | mov xSP, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xSP * 8]
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| 217 | mov xAX, [xDX + CIDETCPUCTX.aGRegs + X86_GREG_xAX * 8]
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| 218 | mov ds, [xDX + CIDETCPUCTX.aSRegs + X86_SREG_DS * 2]
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| 219 | mov xDX, [cs:xDX + CIDETCPUCTX.aGRegs + X86_GREG_xDX * 8]
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| 220 | jmp far [cs:g_uTargetEip]
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| 221 | %endif
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| 222 | ENDPROC CidetAppSaveAndRestoreCtx
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| 223 |
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| 224 |
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| 225 | ;;
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| 226 | ; C callable version of CidetAppSaveAndRestoreCtx more or less.
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| 227 | ;
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| 228 | ; @param pSaveCtx x86:esp+4 gcc:rdi msc:rcx
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| 229 | ; @param pRestoreCtx x86:esp+8 gcc:rsi msc:rdx
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| 230 | BEGINPROC CidetAppExecute
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| 231 | %ifdef RT_ARCH_X86
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| 232 | mov ecx, [esp + 4]
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| 233 | mov edx, [esp + 8]
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| 234 | %elifdef ASM_CALL64_GCC
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| 235 | mov rcx, rdi
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| 236 | mov rdx, rsi
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| 237 | %elifndef ASM_CALL64_MSC
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| 238 | %error "unsupport arch."
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| 239 | %endif
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| 240 | mov word [xCX + CIDETCPUCTX.aSRegs + X86_SREG_DS * 2], ds
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| 241 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xDX * 8], xDX
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| 242 | mov [xCX + CIDETCPUCTX.aGRegs + X86_GREG_xCX * 8], xCX
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| 243 | jmp NAME(CidetAppSaveAndRestoreCtx)
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| 244 | ENDPROC CidetAppExecute
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| 245 |
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| 246 |
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| 247 | ;;
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| 248 | ; C callable restore function.
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| 249 | ;
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| 250 | ; @param pRestoreCtx x86:esp+4 gcc:rdi msc:rcx
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| 251 | BEGINPROC CidetAppRestoreCtx
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| 252 | %ifdef RT_ARCH_X86
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| 253 | mov edx, [esp + 4]
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| 254 | %elifdef ASM_CALL64_GCC
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| 255 | mov rdx, rdi
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| 256 | %elifdef ASM_CALL64_MSC
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| 257 | mov rdx, rcx
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| 258 | %else
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| 259 | %error "unsupport arch."
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| 260 | %endif
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| 261 | mov ds, [cs:xDX + CIDETCPUCTX.aSRegs + X86_SREG_DS * 2]
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| 262 | jmp NAME(CidetAppSaveAndRestoreCtx_Restore)
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| 263 | ENDPROC CidetAppRestoreCtx
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| 264 |
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