1 | /* $Id: IEMAllCImplStrInstr.cpp.h 47740 2013-08-14 19:55:03Z vboxsync $ */
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2 | /** @file
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3 | * IEM - String Instruction Implementation Code Template.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2011-2012 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 |
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18 |
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19 | /*******************************************************************************
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20 | * Defined Constants And Macros *
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21 | *******************************************************************************/
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22 | #if OP_SIZE == 8
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23 | # define OP_rAX al
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24 | #elif OP_SIZE == 16
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25 | # define OP_rAX ax
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26 | #elif OP_SIZE == 32
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27 | # define OP_rAX eax
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28 | #elif OP_SIZE == 64
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29 | # define OP_rAX rax
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30 | #else
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31 | # error "Bad OP_SIZE."
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32 | #endif
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33 | #define OP_TYPE RT_CONCAT3(uint,OP_SIZE,_t)
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34 |
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35 | #if ADDR_SIZE == 16
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36 | # define ADDR_rDI di
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37 | # define ADDR_rSI si
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38 | # define ADDR_rCX cx
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39 | # define ADDR2_TYPE uint32_t
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40 | #elif ADDR_SIZE == 32
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41 | # define ADDR_rDI edi
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42 | # define ADDR_rSI esi
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43 | # define ADDR_rCX ecx
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44 | # define ADDR2_TYPE uint32_t
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45 | #elif ADDR_SIZE == 64
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46 | # define ADDR_rDI rdi
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47 | # define ADDR_rSI rsi
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48 | # define ADDR_rCX rcx
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49 | # define ADDR2_TYPE uint64_t
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50 | # define IS_64_BIT_CODE(a_pIemCpu) (true)
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51 | #else
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52 | # error "Bad ADDR_SIZE."
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53 | #endif
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54 | #define ADDR_TYPE RT_CONCAT3(uint,ADDR_SIZE,_t)
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55 |
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56 | #if ADDR_SIZE == 64 || OP_SIZE == 64
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57 | # define IS_64_BIT_CODE(a_pIemCpu) (true)
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58 | #elif ADDR_SIZE == 32
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59 | # define IS_64_BIT_CODE(a_pIemCpu) ((a_pIemCpu)->enmCpuMode == IEMMODE_64BIT)
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60 | #else
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61 | # define IS_64_BIT_CODE(a_pIemCpu) (false)
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62 | #endif
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63 |
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64 |
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65 | /**
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66 | * Implements 'REPE CMPS'.
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67 | */
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68 | IEM_CIMPL_DEF_1(RT_CONCAT4(iemCImpl_repe_cmps_op,OP_SIZE,_addr,ADDR_SIZE), uint8_t, iEffSeg)
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69 | {
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70 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
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71 |
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72 | /*
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73 | * Setup.
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74 | */
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75 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
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76 | if (uCounterReg == 0)
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77 | {
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78 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
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79 | return VINF_SUCCESS;
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80 | }
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81 |
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82 | PCCPUMSELREGHID pSrc1Hid = iemSRegGetHid(pIemCpu, iEffSeg);
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83 | uint64_t uSrc1Base;
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84 | VBOXSTRICTRC rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, pSrc1Hid, iEffSeg, &uSrc1Base);
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85 | if (rcStrict != VINF_SUCCESS)
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86 | return rcStrict;
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87 |
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88 | uint64_t uSrc2Base;
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89 | rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, &pCtx->es, X86_SREG_ES, &uSrc2Base);
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90 | if (rcStrict != VINF_SUCCESS)
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91 | return rcStrict;
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92 |
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93 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
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94 | ADDR_TYPE uSrc1AddrReg = pCtx->ADDR_rSI;
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95 | ADDR_TYPE uSrc2AddrReg = pCtx->ADDR_rDI;
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96 | uint32_t uEFlags = pCtx->eflags.u;
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97 |
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98 | /*
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99 | * The loop.
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100 | */
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101 | do
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102 | {
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103 | /*
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104 | * Do segmentation and virtual page stuff.
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105 | */
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106 | ADDR2_TYPE uVirtSrc1Addr = uSrc1AddrReg + (ADDR2_TYPE)uSrc1Base;
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107 | ADDR2_TYPE uVirtSrc2Addr = uSrc2AddrReg + (ADDR2_TYPE)uSrc2Base;
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108 | uint32_t cLeftSrc1Page = (PAGE_SIZE - (uVirtSrc1Addr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
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109 | if (cLeftSrc1Page > uCounterReg)
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110 | cLeftSrc1Page = uCounterReg;
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111 | uint32_t cLeftSrc2Page = (PAGE_SIZE - (uVirtSrc2Addr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
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112 | uint32_t cLeftPage = RT_MIN(cLeftSrc1Page, cLeftSrc2Page);
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113 |
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114 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
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115 | && cbIncr > 0 /** @todo Optimize reverse direction string ops. */
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116 | && ( IS_64_BIT_CODE(pIemCpu)
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117 | || ( uSrc1AddrReg < pSrc1Hid->u32Limit
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118 | && uSrc1AddrReg + (cLeftPage * (OP_SIZE / 8)) <= pSrc1Hid->u32Limit
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119 | && uSrc2AddrReg < pCtx->es.u32Limit
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120 | && uSrc2AddrReg + (cLeftPage * (OP_SIZE / 8)) <= pCtx->es.u32Limit)
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121 | )
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122 | )
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123 | {
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124 | RTGCPHYS GCPhysSrc1Mem;
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125 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtSrc1Addr, IEM_ACCESS_DATA_R, &GCPhysSrc1Mem);
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126 | if (rcStrict != VINF_SUCCESS)
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127 | return rcStrict;
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128 |
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129 | RTGCPHYS GCPhysSrc2Mem;
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130 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtSrc2Addr, IEM_ACCESS_DATA_R, &GCPhysSrc2Mem);
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131 | if (rcStrict != VINF_SUCCESS)
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132 | return rcStrict;
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133 |
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134 | /*
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135 | * If we can map the page without trouble, do a block processing
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136 | * until the end of the current page.
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137 | */
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138 | PGMPAGEMAPLOCK PgLockSrc2Mem;
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139 | OP_TYPE const *puSrc2Mem;
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140 | rcStrict = iemMemPageMap(pIemCpu, GCPhysSrc2Mem, IEM_ACCESS_DATA_R, (void **)&puSrc2Mem, &PgLockSrc2Mem);
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141 | if (rcStrict == VINF_SUCCESS)
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142 | {
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143 | PGMPAGEMAPLOCK PgLockSrc1Mem;
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144 | OP_TYPE const *puSrc1Mem;
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145 | rcStrict = iemMemPageMap(pIemCpu, GCPhysSrc1Mem, IEM_ACCESS_DATA_R, (void **)&puSrc1Mem, &PgLockSrc1Mem);
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146 | if (rcStrict == VINF_SUCCESS)
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147 | {
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148 | if (!memcmp(puSrc2Mem, puSrc1Mem, cLeftPage * (OP_SIZE / 8)))
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149 | {
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150 | /* All matches, only compare the last itme to get the right eflags. */
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151 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&puSrc1Mem[cLeftPage-1], puSrc2Mem[cLeftPage-1], &uEFlags);
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152 | uSrc1AddrReg += cLeftPage * cbIncr;
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153 | uSrc2AddrReg += cLeftPage * cbIncr;
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154 | uCounterReg -= cLeftPage;
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155 | }
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156 | else
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157 | {
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158 | /* Some mismatch, compare each item (and keep volatile
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159 | memory in mind). */
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160 | uint32_t off = 0;
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161 | do
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162 | {
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163 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&puSrc1Mem[off], puSrc2Mem[off], &uEFlags);
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164 | off++;
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165 | } while ( off < cLeftPage
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166 | && (uEFlags & X86_EFL_ZF));
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167 | uSrc1AddrReg += cbIncr * off;
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168 | uSrc2AddrReg += cbIncr * off;
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169 | uCounterReg -= off;
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170 | }
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171 |
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172 | /* Update the registers before looping. */
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173 | pCtx->ADDR_rCX = uCounterReg;
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174 | pCtx->ADDR_rSI = uSrc1AddrReg;
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175 | pCtx->ADDR_rDI = uSrc2AddrReg;
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176 | pCtx->eflags.u = uEFlags;
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177 |
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178 | iemMemPageUnmap(pIemCpu, GCPhysSrc1Mem, IEM_ACCESS_DATA_R, puSrc1Mem, &PgLockSrc1Mem);
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179 | iemMemPageUnmap(pIemCpu, GCPhysSrc2Mem, IEM_ACCESS_DATA_R, puSrc2Mem, &PgLockSrc2Mem);
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180 | continue;
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181 | }
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182 | }
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183 | iemMemPageUnmap(pIemCpu, GCPhysSrc2Mem, IEM_ACCESS_DATA_R, puSrc2Mem, &PgLockSrc2Mem);
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184 | }
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185 |
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186 | /*
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187 | * Fallback - slow processing till the end of the current page.
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188 | * In the cross page boundrary case we will end up here with cLeftPage
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189 | * as 0, we execute one loop then.
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190 | */
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191 | do
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192 | {
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193 | OP_TYPE uValue1;
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194 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uValue1, iEffSeg, uSrc1AddrReg);
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195 | if (rcStrict != VINF_SUCCESS)
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196 | return rcStrict;
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197 | OP_TYPE uValue2;
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198 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uValue2, X86_SREG_ES, uSrc2AddrReg);
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199 | if (rcStrict != VINF_SUCCESS)
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200 | return rcStrict;
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201 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)(&uValue1, uValue2, &uEFlags);
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202 |
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203 | pCtx->ADDR_rSI = uSrc1AddrReg += cbIncr;
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204 | pCtx->ADDR_rDI = uSrc2AddrReg += cbIncr;
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205 | pCtx->ADDR_rCX = --uCounterReg;
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206 | pCtx->eflags.u = uEFlags;
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207 | cLeftPage--;
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208 | } while ( (int32_t)cLeftPage > 0
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209 | && (uEFlags & X86_EFL_ZF));
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210 | } while ( uCounterReg != 0
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211 | && (uEFlags & X86_EFL_ZF));
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212 |
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213 | /*
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214 | * Done.
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215 | */
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216 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
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217 | return VINF_SUCCESS;
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218 | }
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219 |
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220 |
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221 | /**
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222 | * Implements 'REPNE CMPS'.
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223 | */
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224 | IEM_CIMPL_DEF_1(RT_CONCAT4(iemCImpl_repne_cmps_op,OP_SIZE,_addr,ADDR_SIZE), uint8_t, iEffSeg)
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225 | {
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226 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
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227 |
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228 | /*
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229 | * Setup.
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230 | */
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231 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
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232 | if (uCounterReg == 0)
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233 | {
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234 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
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235 | return VINF_SUCCESS;
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236 | }
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237 |
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238 | PCCPUMSELREGHID pSrc1Hid = iemSRegGetHid(pIemCpu, iEffSeg);
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239 | uint64_t uSrc1Base;
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240 | VBOXSTRICTRC rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, pSrc1Hid, iEffSeg, &uSrc1Base);
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241 | if (rcStrict != VINF_SUCCESS)
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242 | return rcStrict;
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243 |
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244 | uint64_t uSrc2Base;
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245 | rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, &pCtx->es, X86_SREG_ES, &uSrc2Base);
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246 | if (rcStrict != VINF_SUCCESS)
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247 | return rcStrict;
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248 |
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249 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
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250 | ADDR_TYPE uSrc1AddrReg = pCtx->ADDR_rSI;
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251 | ADDR_TYPE uSrc2AddrReg = pCtx->ADDR_rDI;
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252 | uint32_t uEFlags = pCtx->eflags.u;
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253 |
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254 | /*
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255 | * The loop.
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256 | */
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257 | do
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258 | {
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259 | /*
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260 | * Do segmentation and virtual page stuff.
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261 | */
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262 | ADDR2_TYPE uVirtSrc1Addr = uSrc1AddrReg + (ADDR2_TYPE)uSrc1Base;
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263 | ADDR2_TYPE uVirtSrc2Addr = uSrc2AddrReg + (ADDR2_TYPE)uSrc2Base;
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264 | uint32_t cLeftSrc1Page = (PAGE_SIZE - (uVirtSrc1Addr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
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265 | if (cLeftSrc1Page > uCounterReg)
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266 | cLeftSrc1Page = uCounterReg;
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267 | uint32_t cLeftSrc2Page = (PAGE_SIZE - (uVirtSrc2Addr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
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268 | uint32_t cLeftPage = RT_MIN(cLeftSrc1Page, cLeftSrc2Page);
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269 |
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270 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
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271 | && cbIncr > 0 /** @todo Optimize reverse direction string ops. */
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272 | && ( IS_64_BIT_CODE(pIemCpu)
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273 | || ( uSrc1AddrReg < pSrc1Hid->u32Limit
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274 | && uSrc1AddrReg + (cLeftPage * (OP_SIZE / 8)) <= pSrc1Hid->u32Limit
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275 | && uSrc2AddrReg < pCtx->es.u32Limit
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276 | && uSrc2AddrReg + (cLeftPage * (OP_SIZE / 8)) <= pCtx->es.u32Limit)
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277 | )
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278 | )
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279 | {
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280 | RTGCPHYS GCPhysSrc1Mem;
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281 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtSrc1Addr, IEM_ACCESS_DATA_R, &GCPhysSrc1Mem);
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282 | if (rcStrict != VINF_SUCCESS)
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283 | return rcStrict;
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284 |
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285 | RTGCPHYS GCPhysSrc2Mem;
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286 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtSrc2Addr, IEM_ACCESS_DATA_R, &GCPhysSrc2Mem);
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287 | if (rcStrict != VINF_SUCCESS)
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288 | return rcStrict;
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289 |
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290 | /*
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291 | * If we can map the page without trouble, do a block processing
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292 | * until the end of the current page.
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293 | */
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294 | OP_TYPE const *puSrc2Mem;
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295 | PGMPAGEMAPLOCK PgLockSrc2Mem;
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296 | rcStrict = iemMemPageMap(pIemCpu, GCPhysSrc2Mem, IEM_ACCESS_DATA_R, (void **)&puSrc2Mem, &PgLockSrc2Mem);
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297 | if (rcStrict == VINF_SUCCESS)
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298 | {
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299 | OP_TYPE const *puSrc1Mem;
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300 | PGMPAGEMAPLOCK PgLockSrc1Mem;
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301 | rcStrict = iemMemPageMap(pIemCpu, GCPhysSrc1Mem, IEM_ACCESS_DATA_R, (void **)&puSrc1Mem, &PgLockSrc1Mem);
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302 | if (rcStrict == VINF_SUCCESS)
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303 | {
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304 | if (memcmp(puSrc2Mem, puSrc1Mem, cLeftPage * (OP_SIZE / 8)))
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305 | {
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306 | /* All matches, only compare the last item to get the right eflags. */
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307 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&puSrc1Mem[cLeftPage-1], puSrc2Mem[cLeftPage-1], &uEFlags);
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308 | uSrc1AddrReg += cLeftPage * cbIncr;
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309 | uSrc2AddrReg += cLeftPage * cbIncr;
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310 | uCounterReg -= cLeftPage;
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311 | }
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312 | else
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313 | {
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314 | /* Some mismatch, compare each item (and keep volatile
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315 | memory in mind). */
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316 | uint32_t off = 0;
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317 | do
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318 | {
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319 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&puSrc1Mem[off], puSrc2Mem[off], &uEFlags);
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320 | off++;
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321 | } while ( off < cLeftPage
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322 | && !(uEFlags & X86_EFL_ZF));
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323 | uSrc1AddrReg += cbIncr * off;
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324 | uSrc2AddrReg += cbIncr * off;
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325 | uCounterReg -= off;
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326 | }
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327 |
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328 | /* Update the registers before looping. */
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329 | pCtx->ADDR_rCX = uCounterReg;
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330 | pCtx->ADDR_rSI = uSrc1AddrReg;
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331 | pCtx->ADDR_rDI = uSrc2AddrReg;
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332 | pCtx->eflags.u = uEFlags;
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333 |
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334 | iemMemPageUnmap(pIemCpu, GCPhysSrc1Mem, IEM_ACCESS_DATA_R, puSrc1Mem, &PgLockSrc1Mem);
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335 | iemMemPageUnmap(pIemCpu, GCPhysSrc2Mem, IEM_ACCESS_DATA_R, puSrc2Mem, &PgLockSrc2Mem);
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336 | continue;
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337 | }
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338 | iemMemPageUnmap(pIemCpu, GCPhysSrc2Mem, IEM_ACCESS_DATA_R, puSrc2Mem, &PgLockSrc2Mem);
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339 | }
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340 | }
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341 |
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342 | /*
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343 | * Fallback - slow processing till the end of the current page.
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344 | * In the cross page boundrary case we will end up here with cLeftPage
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345 | * as 0, we execute one loop then.
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346 | */
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347 | do
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348 | {
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349 | OP_TYPE uValue1;
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350 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uValue1, iEffSeg, uSrc1AddrReg);
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351 | if (rcStrict != VINF_SUCCESS)
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352 | return rcStrict;
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353 | OP_TYPE uValue2;
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354 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uValue2, X86_SREG_ES, uSrc2AddrReg);
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355 | if (rcStrict != VINF_SUCCESS)
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356 | return rcStrict;
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357 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)(&uValue1, uValue2, &uEFlags);
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358 |
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359 | pCtx->ADDR_rSI = uSrc1AddrReg += cbIncr;
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360 | pCtx->ADDR_rDI = uSrc2AddrReg += cbIncr;
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361 | pCtx->ADDR_rCX = --uCounterReg;
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362 | pCtx->eflags.u = uEFlags;
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363 | cLeftPage--;
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364 | } while ( (int32_t)cLeftPage > 0
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365 | && !(uEFlags & X86_EFL_ZF));
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366 | } while ( uCounterReg != 0
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367 | && !(uEFlags & X86_EFL_ZF));
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368 |
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369 | /*
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370 | * Done.
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371 | */
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372 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
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373 | return VINF_SUCCESS;
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374 | }
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375 |
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376 |
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377 | /**
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378 | * Implements 'REPE SCAS'.
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379 | */
|
---|
380 | IEM_CIMPL_DEF_0(RT_CONCAT4(iemCImpl_repe_scas_,OP_rAX,_m,ADDR_SIZE))
|
---|
381 | {
|
---|
382 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
383 |
|
---|
384 | /*
|
---|
385 | * Setup.
|
---|
386 | */
|
---|
387 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
|
---|
388 | if (uCounterReg == 0)
|
---|
389 | {
|
---|
390 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
391 | return VINF_SUCCESS;
|
---|
392 | }
|
---|
393 |
|
---|
394 | uint64_t uBaseAddr;
|
---|
395 | VBOXSTRICTRC rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, &pCtx->es, X86_SREG_ES, &uBaseAddr);
|
---|
396 | if (rcStrict != VINF_SUCCESS)
|
---|
397 | return rcStrict;
|
---|
398 |
|
---|
399 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
|
---|
400 | OP_TYPE const uValueReg = pCtx->OP_rAX;
|
---|
401 | ADDR_TYPE uAddrReg = pCtx->ADDR_rDI;
|
---|
402 | uint32_t uEFlags = pCtx->eflags.u;
|
---|
403 |
|
---|
404 | /*
|
---|
405 | * The loop.
|
---|
406 | */
|
---|
407 | do
|
---|
408 | {
|
---|
409 | /*
|
---|
410 | * Do segmentation and virtual page stuff.
|
---|
411 | */
|
---|
412 | ADDR2_TYPE uVirtAddr = uAddrReg + (ADDR2_TYPE)uBaseAddr;
|
---|
413 | uint32_t cLeftPage = (PAGE_SIZE - (uVirtAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
414 | if (cLeftPage > uCounterReg)
|
---|
415 | cLeftPage = uCounterReg;
|
---|
416 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
|
---|
417 | && cbIncr > 0 /** @todo Implement reverse direction string ops. */
|
---|
418 | && ( IS_64_BIT_CODE(pIemCpu)
|
---|
419 | || ( uAddrReg < pCtx->es.u32Limit
|
---|
420 | && uAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pCtx->es.u32Limit)
|
---|
421 | )
|
---|
422 | )
|
---|
423 | {
|
---|
424 | RTGCPHYS GCPhysMem;
|
---|
425 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtAddr, IEM_ACCESS_DATA_R, &GCPhysMem);
|
---|
426 | if (rcStrict != VINF_SUCCESS)
|
---|
427 | return rcStrict;
|
---|
428 |
|
---|
429 | /*
|
---|
430 | * If we can map the page without trouble, do a block processing
|
---|
431 | * until the end of the current page.
|
---|
432 | */
|
---|
433 | PGMPAGEMAPLOCK PgLockMem;
|
---|
434 | OP_TYPE const *puMem;
|
---|
435 | rcStrict = iemMemPageMap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, (void **)&puMem, &PgLockMem);
|
---|
436 | if (rcStrict == VINF_SUCCESS)
|
---|
437 | {
|
---|
438 | /* Search till we find a mismatching item. */
|
---|
439 | OP_TYPE uTmpValue;
|
---|
440 | bool fQuit;
|
---|
441 | uint32_t i = 0;
|
---|
442 | do
|
---|
443 | {
|
---|
444 | uTmpValue = puMem[i++];
|
---|
445 | fQuit = uTmpValue != uValueReg;
|
---|
446 | } while (i < cLeftPage && !fQuit);
|
---|
447 |
|
---|
448 | /* Update the regs. */
|
---|
449 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&uValueReg, uTmpValue, &uEFlags);
|
---|
450 | pCtx->ADDR_rCX = uCounterReg -= i;
|
---|
451 | pCtx->ADDR_rDI = uAddrReg += i * cbIncr;
|
---|
452 | pCtx->eflags.u = uEFlags;
|
---|
453 | Assert(!(uEFlags & X86_EFL_ZF) == fQuit);
|
---|
454 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, puMem, &PgLockMem);
|
---|
455 | if (fQuit)
|
---|
456 | break;
|
---|
457 |
|
---|
458 |
|
---|
459 | /* If unaligned, we drop thru and do the page crossing access
|
---|
460 | below. Otherwise, do the next page. */
|
---|
461 | if (!(uVirtAddr & (OP_SIZE - 1)))
|
---|
462 | continue;
|
---|
463 | if (uCounterReg == 0)
|
---|
464 | break;
|
---|
465 | cLeftPage = 0;
|
---|
466 | }
|
---|
467 | }
|
---|
468 |
|
---|
469 | /*
|
---|
470 | * Fallback - slow processing till the end of the current page.
|
---|
471 | * In the cross page boundrary case we will end up here with cLeftPage
|
---|
472 | * as 0, we execute one loop then.
|
---|
473 | */
|
---|
474 | do
|
---|
475 | {
|
---|
476 | OP_TYPE uTmpValue;
|
---|
477 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uTmpValue, X86_SREG_ES, uAddrReg);
|
---|
478 | if (rcStrict != VINF_SUCCESS)
|
---|
479 | return rcStrict;
|
---|
480 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&uValueReg, uTmpValue, &uEFlags);
|
---|
481 |
|
---|
482 | pCtx->ADDR_rDI = uAddrReg += cbIncr;
|
---|
483 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
484 | pCtx->eflags.u = uEFlags;
|
---|
485 | cLeftPage--;
|
---|
486 | } while ( (int32_t)cLeftPage > 0
|
---|
487 | && (uEFlags & X86_EFL_ZF));
|
---|
488 | } while ( uCounterReg != 0
|
---|
489 | && (uEFlags & X86_EFL_ZF));
|
---|
490 |
|
---|
491 | /*
|
---|
492 | * Done.
|
---|
493 | */
|
---|
494 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
495 | return VINF_SUCCESS;
|
---|
496 | }
|
---|
497 |
|
---|
498 |
|
---|
499 | /**
|
---|
500 | * Implements 'REPNE SCAS'.
|
---|
501 | */
|
---|
502 | IEM_CIMPL_DEF_0(RT_CONCAT4(iemCImpl_repne_scas_,OP_rAX,_m,ADDR_SIZE))
|
---|
503 | {
|
---|
504 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
505 |
|
---|
506 | /*
|
---|
507 | * Setup.
|
---|
508 | */
|
---|
509 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
|
---|
510 | if (uCounterReg == 0)
|
---|
511 | {
|
---|
512 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
513 | return VINF_SUCCESS;
|
---|
514 | }
|
---|
515 |
|
---|
516 | uint64_t uBaseAddr;
|
---|
517 | VBOXSTRICTRC rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, &pCtx->es, X86_SREG_ES, &uBaseAddr);
|
---|
518 | if (rcStrict != VINF_SUCCESS)
|
---|
519 | return rcStrict;
|
---|
520 |
|
---|
521 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
|
---|
522 | OP_TYPE const uValueReg = pCtx->OP_rAX;
|
---|
523 | ADDR_TYPE uAddrReg = pCtx->ADDR_rDI;
|
---|
524 | uint32_t uEFlags = pCtx->eflags.u;
|
---|
525 |
|
---|
526 | /*
|
---|
527 | * The loop.
|
---|
528 | */
|
---|
529 | do
|
---|
530 | {
|
---|
531 | /*
|
---|
532 | * Do segmentation and virtual page stuff.
|
---|
533 | */
|
---|
534 | ADDR2_TYPE uVirtAddr = uAddrReg + (ADDR2_TYPE)uBaseAddr;
|
---|
535 | uint32_t cLeftPage = (PAGE_SIZE - (uVirtAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
536 | if (cLeftPage > uCounterReg)
|
---|
537 | cLeftPage = uCounterReg;
|
---|
538 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
|
---|
539 | && cbIncr > 0 /** @todo Implement reverse direction string ops. */
|
---|
540 | && ( IS_64_BIT_CODE(pIemCpu)
|
---|
541 | || ( uAddrReg < pCtx->es.u32Limit
|
---|
542 | && uAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pCtx->es.u32Limit)
|
---|
543 | )
|
---|
544 | )
|
---|
545 | {
|
---|
546 | RTGCPHYS GCPhysMem;
|
---|
547 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtAddr, IEM_ACCESS_DATA_R, &GCPhysMem);
|
---|
548 | if (rcStrict != VINF_SUCCESS)
|
---|
549 | return rcStrict;
|
---|
550 |
|
---|
551 | /*
|
---|
552 | * If we can map the page without trouble, do a block processing
|
---|
553 | * until the end of the current page.
|
---|
554 | */
|
---|
555 | PGMPAGEMAPLOCK PgLockMem;
|
---|
556 | OP_TYPE const *puMem;
|
---|
557 | rcStrict = iemMemPageMap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, (void **)&puMem, &PgLockMem);
|
---|
558 | if (rcStrict == VINF_SUCCESS)
|
---|
559 | {
|
---|
560 | /* Search till we find a mismatching item. */
|
---|
561 | OP_TYPE uTmpValue;
|
---|
562 | bool fQuit;
|
---|
563 | uint32_t i = 0;
|
---|
564 | do
|
---|
565 | {
|
---|
566 | uTmpValue = puMem[i++];
|
---|
567 | fQuit = uTmpValue == uValueReg;
|
---|
568 | } while (i < cLeftPage && !fQuit);
|
---|
569 |
|
---|
570 | /* Update the regs. */
|
---|
571 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&uValueReg, uTmpValue, &uEFlags);
|
---|
572 | pCtx->ADDR_rCX = uCounterReg -= i;
|
---|
573 | pCtx->ADDR_rDI = uAddrReg += i * cbIncr;
|
---|
574 | pCtx->eflags.u = uEFlags;
|
---|
575 | Assert(!!(uEFlags & X86_EFL_ZF) == fQuit);
|
---|
576 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, puMem, &PgLockMem);
|
---|
577 | if (fQuit)
|
---|
578 | break;
|
---|
579 |
|
---|
580 |
|
---|
581 | /* If unaligned, we drop thru and do the page crossing access
|
---|
582 | below. Otherwise, do the next page. */
|
---|
583 | if (!(uVirtAddr & (OP_SIZE - 1)))
|
---|
584 | continue;
|
---|
585 | if (uCounterReg == 0)
|
---|
586 | break;
|
---|
587 | cLeftPage = 0;
|
---|
588 | }
|
---|
589 | }
|
---|
590 |
|
---|
591 | /*
|
---|
592 | * Fallback - slow processing till the end of the current page.
|
---|
593 | * In the cross page boundrary case we will end up here with cLeftPage
|
---|
594 | * as 0, we execute one loop then.
|
---|
595 | */
|
---|
596 | do
|
---|
597 | {
|
---|
598 | OP_TYPE uTmpValue;
|
---|
599 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uTmpValue, X86_SREG_ES, uAddrReg);
|
---|
600 | if (rcStrict != VINF_SUCCESS)
|
---|
601 | return rcStrict;
|
---|
602 | RT_CONCAT(iemAImpl_cmp_u,OP_SIZE)((OP_TYPE *)&uValueReg, uTmpValue, &uEFlags);
|
---|
603 | pCtx->ADDR_rDI = uAddrReg += cbIncr;
|
---|
604 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
605 | pCtx->eflags.u = uEFlags;
|
---|
606 | cLeftPage--;
|
---|
607 | } while ( (int32_t)cLeftPage > 0
|
---|
608 | && !(uEFlags & X86_EFL_ZF));
|
---|
609 | } while ( uCounterReg != 0
|
---|
610 | && !(uEFlags & X86_EFL_ZF));
|
---|
611 |
|
---|
612 | /*
|
---|
613 | * Done.
|
---|
614 | */
|
---|
615 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
616 | return VINF_SUCCESS;
|
---|
617 | }
|
---|
618 |
|
---|
619 |
|
---|
620 |
|
---|
621 |
|
---|
622 | /**
|
---|
623 | * Implements 'REP MOVS'.
|
---|
624 | */
|
---|
625 | IEM_CIMPL_DEF_1(RT_CONCAT4(iemCImpl_rep_movs_op,OP_SIZE,_addr,ADDR_SIZE), uint8_t, iEffSeg)
|
---|
626 | {
|
---|
627 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
628 |
|
---|
629 | /*
|
---|
630 | * Setup.
|
---|
631 | */
|
---|
632 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
|
---|
633 | if (uCounterReg == 0)
|
---|
634 | {
|
---|
635 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
636 | return VINF_SUCCESS;
|
---|
637 | }
|
---|
638 |
|
---|
639 | PCCPUMSELREGHID pSrcHid = iemSRegGetHid(pIemCpu, iEffSeg);
|
---|
640 | uint64_t uSrcBase;
|
---|
641 | VBOXSTRICTRC rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, pSrcHid, iEffSeg, &uSrcBase);
|
---|
642 | if (rcStrict != VINF_SUCCESS)
|
---|
643 | return rcStrict;
|
---|
644 |
|
---|
645 | uint64_t uDstBase;
|
---|
646 | rcStrict = iemMemSegCheckWriteAccessEx(pIemCpu, &pCtx->es, X86_SREG_ES, &uDstBase);
|
---|
647 | if (rcStrict != VINF_SUCCESS)
|
---|
648 | return rcStrict;
|
---|
649 |
|
---|
650 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
|
---|
651 | ADDR_TYPE uSrcAddrReg = pCtx->ADDR_rSI;
|
---|
652 | ADDR_TYPE uDstAddrReg = pCtx->ADDR_rDI;
|
---|
653 |
|
---|
654 | /*
|
---|
655 | * Be careful with handle bypassing.
|
---|
656 | */
|
---|
657 | if (pIemCpu->fBypassHandlers)
|
---|
658 | {
|
---|
659 | Log(("%s: declining because we're bypassing handlers\n", __FUNCTION__));
|
---|
660 | return VERR_IEM_ASPECT_NOT_IMPLEMENTED;
|
---|
661 | }
|
---|
662 |
|
---|
663 | /*
|
---|
664 | * If we're reading back what we write, we have to let the verfication code
|
---|
665 | * to prevent a false positive.
|
---|
666 | * Note! This doesn't take aliasing or wrapping into account - lazy bird.
|
---|
667 | */
|
---|
668 | #ifdef IEM_VERIFICATION_MODE_FULL
|
---|
669 | if ( IEM_VERIFICATION_ENABLED(pIemCpu)
|
---|
670 | && (cbIncr > 0
|
---|
671 | ? uSrcAddrReg <= uDstAddrReg
|
---|
672 | && uSrcAddrReg + cbIncr * uCounterReg > uDstAddrReg
|
---|
673 | : uDstAddrReg <= uSrcAddrReg
|
---|
674 | && uDstAddrReg + cbIncr * uCounterReg > uSrcAddrReg))
|
---|
675 | pIemCpu->fOverlappingMovs = true;
|
---|
676 | #endif
|
---|
677 |
|
---|
678 | /*
|
---|
679 | * The loop.
|
---|
680 | */
|
---|
681 | do
|
---|
682 | {
|
---|
683 | /*
|
---|
684 | * Do segmentation and virtual page stuff.
|
---|
685 | */
|
---|
686 | ADDR2_TYPE uVirtSrcAddr = uSrcAddrReg + (ADDR2_TYPE)uSrcBase;
|
---|
687 | ADDR2_TYPE uVirtDstAddr = uDstAddrReg + (ADDR2_TYPE)uDstBase;
|
---|
688 | uint32_t cLeftSrcPage = (PAGE_SIZE - (uVirtSrcAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
689 | if (cLeftSrcPage > uCounterReg)
|
---|
690 | cLeftSrcPage = uCounterReg;
|
---|
691 | uint32_t cLeftDstPage = (PAGE_SIZE - (uVirtDstAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
692 | uint32_t cLeftPage = RT_MIN(cLeftSrcPage, cLeftDstPage);
|
---|
693 |
|
---|
694 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
|
---|
695 | && cbIncr > 0 /** @todo Implement reverse direction string ops. */
|
---|
696 | && ( IS_64_BIT_CODE(pIemCpu)
|
---|
697 | || ( uSrcAddrReg < pSrcHid->u32Limit
|
---|
698 | && uSrcAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pSrcHid->u32Limit
|
---|
699 | && uDstAddrReg < pCtx->es.u32Limit
|
---|
700 | && uDstAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pCtx->es.u32Limit)
|
---|
701 | )
|
---|
702 | )
|
---|
703 | {
|
---|
704 | RTGCPHYS GCPhysSrcMem;
|
---|
705 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtSrcAddr, IEM_ACCESS_DATA_R, &GCPhysSrcMem);
|
---|
706 | if (rcStrict != VINF_SUCCESS)
|
---|
707 | return rcStrict;
|
---|
708 |
|
---|
709 | RTGCPHYS GCPhysDstMem;
|
---|
710 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtDstAddr, IEM_ACCESS_DATA_W, &GCPhysDstMem);
|
---|
711 | if (rcStrict != VINF_SUCCESS)
|
---|
712 | return rcStrict;
|
---|
713 |
|
---|
714 | /*
|
---|
715 | * If we can map the page without trouble, do a block processing
|
---|
716 | * until the end of the current page.
|
---|
717 | */
|
---|
718 | PGMPAGEMAPLOCK PgLockDstMem;
|
---|
719 | OP_TYPE *puDstMem;
|
---|
720 | rcStrict = iemMemPageMap(pIemCpu, GCPhysDstMem, IEM_ACCESS_DATA_W, (void **)&puDstMem, &PgLockDstMem);
|
---|
721 | if (rcStrict == VINF_SUCCESS)
|
---|
722 | {
|
---|
723 | PGMPAGEMAPLOCK PgLockSrcMem;
|
---|
724 | OP_TYPE const *puSrcMem;
|
---|
725 | rcStrict = iemMemPageMap(pIemCpu, GCPhysSrcMem, IEM_ACCESS_DATA_R, (void **)&puSrcMem, &PgLockSrcMem);
|
---|
726 | if (rcStrict == VINF_SUCCESS)
|
---|
727 | {
|
---|
728 | Assert( (GCPhysSrcMem >> PAGE_SHIFT) != (GCPhysDstMem >> PAGE_SHIFT)
|
---|
729 | || ((uintptr_t)puSrcMem >> PAGE_SHIFT) == ((uintptr_t)puDstMem >> PAGE_SHIFT));
|
---|
730 |
|
---|
731 | /* Perform the operation exactly (don't use memcpy to avoid
|
---|
732 | having to consider how its implementation would affect
|
---|
733 | any overlapping source and destination area). */
|
---|
734 | OP_TYPE const *puSrcCur = puSrcMem;
|
---|
735 | OP_TYPE *puDstCur = puDstMem;
|
---|
736 | uint32_t cTodo = cLeftPage;
|
---|
737 | while (cTodo-- > 0)
|
---|
738 | *puDstCur++ = *puSrcCur++;
|
---|
739 |
|
---|
740 | /* Update the registers. */
|
---|
741 | pCtx->ADDR_rSI = uSrcAddrReg += cLeftPage * cbIncr;
|
---|
742 | pCtx->ADDR_rDI = uDstAddrReg += cLeftPage * cbIncr;
|
---|
743 | pCtx->ADDR_rCX = uCounterReg -= cLeftPage;
|
---|
744 |
|
---|
745 | iemMemPageUnmap(pIemCpu, GCPhysSrcMem, IEM_ACCESS_DATA_R, puSrcMem, &PgLockSrcMem);
|
---|
746 | iemMemPageUnmap(pIemCpu, GCPhysDstMem, IEM_ACCESS_DATA_W, puDstMem, &PgLockDstMem);
|
---|
747 | continue;
|
---|
748 | }
|
---|
749 | iemMemPageUnmap(pIemCpu, GCPhysDstMem, IEM_ACCESS_DATA_W, puDstMem, &PgLockDstMem);
|
---|
750 | }
|
---|
751 | }
|
---|
752 |
|
---|
753 | /*
|
---|
754 | * Fallback - slow processing till the end of the current page.
|
---|
755 | * In the cross page boundrary case we will end up here with cLeftPage
|
---|
756 | * as 0, we execute one loop then.
|
---|
757 | */
|
---|
758 | do
|
---|
759 | {
|
---|
760 | OP_TYPE uValue;
|
---|
761 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uValue, iEffSeg, uSrcAddrReg);
|
---|
762 | if (rcStrict != VINF_SUCCESS)
|
---|
763 | return rcStrict;
|
---|
764 | rcStrict = RT_CONCAT(iemMemStoreDataU,OP_SIZE)(pIemCpu, X86_SREG_ES, uDstAddrReg, uValue);
|
---|
765 | if (rcStrict != VINF_SUCCESS)
|
---|
766 | return rcStrict;
|
---|
767 |
|
---|
768 | pCtx->ADDR_rSI = uSrcAddrReg += cbIncr;
|
---|
769 | pCtx->ADDR_rDI = uDstAddrReg += cbIncr;
|
---|
770 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
771 | cLeftPage--;
|
---|
772 | } while ((int32_t)cLeftPage > 0);
|
---|
773 | } while (uCounterReg != 0);
|
---|
774 |
|
---|
775 | /*
|
---|
776 | * Done.
|
---|
777 | */
|
---|
778 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
779 | return VINF_SUCCESS;
|
---|
780 | }
|
---|
781 |
|
---|
782 |
|
---|
783 | /**
|
---|
784 | * Implements 'REP STOS'.
|
---|
785 | */
|
---|
786 | IEM_CIMPL_DEF_0(RT_CONCAT4(iemCImpl_stos_,OP_rAX,_m,ADDR_SIZE))
|
---|
787 | {
|
---|
788 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
789 |
|
---|
790 | /*
|
---|
791 | * Setup.
|
---|
792 | */
|
---|
793 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
|
---|
794 | if (uCounterReg == 0)
|
---|
795 | {
|
---|
796 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
797 | return VINF_SUCCESS;
|
---|
798 | }
|
---|
799 |
|
---|
800 | uint64_t uBaseAddr;
|
---|
801 | VBOXSTRICTRC rcStrict = iemMemSegCheckWriteAccessEx(pIemCpu, &pCtx->es, X86_SREG_ES, &uBaseAddr);
|
---|
802 | if (rcStrict != VINF_SUCCESS)
|
---|
803 | return rcStrict;
|
---|
804 |
|
---|
805 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
|
---|
806 | OP_TYPE const uValue = pCtx->OP_rAX;
|
---|
807 | ADDR_TYPE uAddrReg = pCtx->ADDR_rDI;
|
---|
808 |
|
---|
809 | /*
|
---|
810 | * Be careful with handle bypassing.
|
---|
811 | */
|
---|
812 | /** @todo Permit doing a page if correctly aligned. */
|
---|
813 | if (pIemCpu->fBypassHandlers)
|
---|
814 | {
|
---|
815 | Log(("%s: declining because we're bypassing handlers\n", __FUNCTION__));
|
---|
816 | return VERR_IEM_ASPECT_NOT_IMPLEMENTED;
|
---|
817 | }
|
---|
818 |
|
---|
819 | /*
|
---|
820 | * The loop.
|
---|
821 | */
|
---|
822 | do
|
---|
823 | {
|
---|
824 | /*
|
---|
825 | * Do segmentation and virtual page stuff.
|
---|
826 | */
|
---|
827 | ADDR2_TYPE uVirtAddr = uAddrReg + (ADDR2_TYPE)uBaseAddr;
|
---|
828 | uint32_t cLeftPage = (PAGE_SIZE - (uVirtAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
829 | if (cLeftPage > uCounterReg)
|
---|
830 | cLeftPage = uCounterReg;
|
---|
831 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
|
---|
832 | && cbIncr > 0 /** @todo Implement reverse direction string ops. */
|
---|
833 | && ( IS_64_BIT_CODE(pIemCpu)
|
---|
834 | || ( uAddrReg < pCtx->es.u32Limit
|
---|
835 | && uAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pCtx->es.u32Limit)
|
---|
836 | )
|
---|
837 | )
|
---|
838 | {
|
---|
839 | RTGCPHYS GCPhysMem;
|
---|
840 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtAddr, IEM_ACCESS_DATA_W, &GCPhysMem);
|
---|
841 | if (rcStrict != VINF_SUCCESS)
|
---|
842 | return rcStrict;
|
---|
843 |
|
---|
844 | /*
|
---|
845 | * If we can map the page without trouble, do a block processing
|
---|
846 | * until the end of the current page.
|
---|
847 | */
|
---|
848 | PGMPAGEMAPLOCK PgLockMem;
|
---|
849 | OP_TYPE *puMem;
|
---|
850 | rcStrict = iemMemPageMap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_W, (void **)&puMem, &PgLockMem);
|
---|
851 | if (rcStrict == VINF_SUCCESS)
|
---|
852 | {
|
---|
853 | /* Update the regs first so we can loop on cLeftPage. */
|
---|
854 | pCtx->ADDR_rCX = uCounterReg -= cLeftPage;
|
---|
855 | pCtx->ADDR_rDI = uAddrReg += cLeftPage * cbIncr;
|
---|
856 |
|
---|
857 | /* Do the memsetting. */
|
---|
858 | #if OP_SIZE == 8
|
---|
859 | memset(puMem, uValue, cLeftPage);
|
---|
860 | /*#elif OP_SIZE == 32
|
---|
861 | ASMMemFill32(puMem, cLeftPage * (OP_SIZE / 8), uValue);*/
|
---|
862 | #else
|
---|
863 | while (cLeftPage-- > 0)
|
---|
864 | *puMem++ = uValue;
|
---|
865 | #endif
|
---|
866 |
|
---|
867 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_W, puMem, &PgLockMem);
|
---|
868 |
|
---|
869 | /* If unaligned, we drop thru and do the page crossing access
|
---|
870 | below. Otherwise, do the next page. */
|
---|
871 | if (!(uVirtAddr & (OP_SIZE - 1)))
|
---|
872 | continue;
|
---|
873 | if (uCounterReg == 0)
|
---|
874 | break;
|
---|
875 | cLeftPage = 0;
|
---|
876 | }
|
---|
877 | }
|
---|
878 |
|
---|
879 | /*
|
---|
880 | * Fallback - slow processing till the end of the current page.
|
---|
881 | * In the cross page boundrary case we will end up here with cLeftPage
|
---|
882 | * as 0, we execute one loop then.
|
---|
883 | */
|
---|
884 | do
|
---|
885 | {
|
---|
886 | rcStrict = RT_CONCAT(iemMemStoreDataU,OP_SIZE)(pIemCpu, X86_SREG_ES, uAddrReg, uValue);
|
---|
887 | if (rcStrict != VINF_SUCCESS)
|
---|
888 | return rcStrict;
|
---|
889 | pCtx->ADDR_rDI = uAddrReg += cbIncr;
|
---|
890 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
891 | cLeftPage--;
|
---|
892 | } while ((int32_t)cLeftPage > 0);
|
---|
893 | } while (uCounterReg != 0);
|
---|
894 |
|
---|
895 | /*
|
---|
896 | * Done.
|
---|
897 | */
|
---|
898 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
899 | return VINF_SUCCESS;
|
---|
900 | }
|
---|
901 |
|
---|
902 |
|
---|
903 | /**
|
---|
904 | * Implements 'REP LODS'.
|
---|
905 | */
|
---|
906 | IEM_CIMPL_DEF_1(RT_CONCAT4(iemCImpl_lods_,OP_rAX,_m,ADDR_SIZE), int8_t, iEffSeg)
|
---|
907 | {
|
---|
908 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
909 |
|
---|
910 | /*
|
---|
911 | * Setup.
|
---|
912 | */
|
---|
913 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
|
---|
914 | if (uCounterReg == 0)
|
---|
915 | {
|
---|
916 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
917 | return VINF_SUCCESS;
|
---|
918 | }
|
---|
919 |
|
---|
920 | PCCPUMSELREGHID pSrcHid = iemSRegGetHid(pIemCpu, iEffSeg);
|
---|
921 | uint64_t uBaseAddr;
|
---|
922 | VBOXSTRICTRC rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, pSrcHid, iEffSeg, &uBaseAddr);
|
---|
923 | if (rcStrict != VINF_SUCCESS)
|
---|
924 | return rcStrict;
|
---|
925 |
|
---|
926 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
|
---|
927 | ADDR_TYPE uAddrReg = pCtx->ADDR_rSI;
|
---|
928 |
|
---|
929 | /*
|
---|
930 | * The loop.
|
---|
931 | */
|
---|
932 | do
|
---|
933 | {
|
---|
934 | /*
|
---|
935 | * Do segmentation and virtual page stuff.
|
---|
936 | */
|
---|
937 | ADDR2_TYPE uVirtAddr = uAddrReg + (ADDR2_TYPE)uBaseAddr;
|
---|
938 | uint32_t cLeftPage = (PAGE_SIZE - (uVirtAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
939 | if (cLeftPage > uCounterReg)
|
---|
940 | cLeftPage = uCounterReg;
|
---|
941 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
|
---|
942 | && cbIncr > 0 /** @todo Implement reverse direction string ops. */
|
---|
943 | && ( IS_64_BIT_CODE(pIemCpu)
|
---|
944 | || ( uAddrReg < pSrcHid->u32Limit
|
---|
945 | && uAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pSrcHid->u32Limit)
|
---|
946 | )
|
---|
947 | )
|
---|
948 | {
|
---|
949 | RTGCPHYS GCPhysMem;
|
---|
950 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtAddr, IEM_ACCESS_DATA_R, &GCPhysMem);
|
---|
951 | if (rcStrict != VINF_SUCCESS)
|
---|
952 | return rcStrict;
|
---|
953 |
|
---|
954 | /*
|
---|
955 | * If we can map the page without trouble, we can get away with
|
---|
956 | * just reading the last value on the page.
|
---|
957 | */
|
---|
958 | PGMPAGEMAPLOCK PgLockMem;
|
---|
959 | OP_TYPE const *puMem;
|
---|
960 | rcStrict = iemMemPageMap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, (void **)&puMem, &PgLockMem);
|
---|
961 | if (rcStrict == VINF_SUCCESS)
|
---|
962 | {
|
---|
963 | /* Only get the last byte, the rest doesn't matter in direct access mode. */
|
---|
964 | #if OP_SIZE == 32
|
---|
965 | pCtx->rax = puMem[cLeftPage - 1];
|
---|
966 | #else
|
---|
967 | pCtx->OP_rAX = puMem[cLeftPage - 1];
|
---|
968 | #endif
|
---|
969 | pCtx->ADDR_rCX = uCounterReg -= cLeftPage;
|
---|
970 | pCtx->ADDR_rSI = uAddrReg += cLeftPage * cbIncr;
|
---|
971 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, puMem, &PgLockMem);
|
---|
972 |
|
---|
973 | /* If unaligned, we drop thru and do the page crossing access
|
---|
974 | below. Otherwise, do the next page. */
|
---|
975 | if (!(uVirtAddr & (OP_SIZE - 1)))
|
---|
976 | continue;
|
---|
977 | if (uCounterReg == 0)
|
---|
978 | break;
|
---|
979 | cLeftPage = 0;
|
---|
980 | }
|
---|
981 | }
|
---|
982 |
|
---|
983 | /*
|
---|
984 | * Fallback - slow processing till the end of the current page.
|
---|
985 | * In the cross page boundrary case we will end up here with cLeftPage
|
---|
986 | * as 0, we execute one loop then.
|
---|
987 | */
|
---|
988 | do
|
---|
989 | {
|
---|
990 | OP_TYPE uTmpValue;
|
---|
991 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uTmpValue, iEffSeg, uAddrReg);
|
---|
992 | if (rcStrict != VINF_SUCCESS)
|
---|
993 | return rcStrict;
|
---|
994 | #if OP_SIZE == 32
|
---|
995 | pCtx->rax = uTmpValue;
|
---|
996 | #else
|
---|
997 | pCtx->OP_rAX = uTmpValue;
|
---|
998 | #endif
|
---|
999 | pCtx->ADDR_rSI = uAddrReg += cbIncr;
|
---|
1000 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
1001 | cLeftPage--;
|
---|
1002 | } while ((int32_t)cLeftPage > 0);
|
---|
1003 | if (rcStrict != VINF_SUCCESS)
|
---|
1004 | break;
|
---|
1005 | } while (uCounterReg != 0);
|
---|
1006 |
|
---|
1007 | /*
|
---|
1008 | * Done.
|
---|
1009 | */
|
---|
1010 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1011 | return VINF_SUCCESS;
|
---|
1012 | }
|
---|
1013 |
|
---|
1014 |
|
---|
1015 | #if OP_SIZE != 64
|
---|
1016 |
|
---|
1017 | /**
|
---|
1018 | * Implements 'INS' (no rep)
|
---|
1019 | */
|
---|
1020 | IEM_CIMPL_DEF_1(RT_CONCAT4(iemCImpl_ins_op,OP_SIZE,_addr,ADDR_SIZE), bool, fIoChecked)
|
---|
1021 | {
|
---|
1022 | PVM pVM = IEMCPU_TO_VM(pIemCpu);
|
---|
1023 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
1024 | VBOXSTRICTRC rcStrict;
|
---|
1025 |
|
---|
1026 | /*
|
---|
1027 | * Be careful with handle bypassing.
|
---|
1028 | */
|
---|
1029 | if (pIemCpu->fBypassHandlers)
|
---|
1030 | {
|
---|
1031 | Log(("%s: declining because we're bypassing handlers\n", __FUNCTION__));
|
---|
1032 | return VERR_IEM_ASPECT_NOT_IMPLEMENTED;
|
---|
1033 | }
|
---|
1034 |
|
---|
1035 | /*
|
---|
1036 | * ASSUMES the #GP for I/O permission is taken first, then any #GP for
|
---|
1037 | * segmentation and finally any #PF due to virtual address translation.
|
---|
1038 | * ASSUMES nothing is read from the I/O port before traps are taken.
|
---|
1039 | */
|
---|
1040 | if (!fIoChecked)
|
---|
1041 | {
|
---|
1042 | rcStrict = iemHlpCheckPortIOPermission(pIemCpu, pCtx, pCtx->dx, OP_SIZE / 8);
|
---|
1043 | if (rcStrict != VINF_SUCCESS)
|
---|
1044 | return rcStrict;
|
---|
1045 | }
|
---|
1046 |
|
---|
1047 | OP_TYPE *puMem;
|
---|
1048 | rcStrict = iemMemMap(pIemCpu, (void **)&puMem, OP_SIZE / 8, X86_SREG_ES, pCtx->ADDR_rDI, IEM_ACCESS_DATA_W);
|
---|
1049 | if (rcStrict != VINF_SUCCESS)
|
---|
1050 | return rcStrict;
|
---|
1051 |
|
---|
1052 | uint32_t u32Value = 0;
|
---|
1053 | if (!IEM_VERIFICATION_ENABLED(pIemCpu))
|
---|
1054 | rcStrict = IOMIOPortRead(pVM, IEMCPU_TO_VMCPU(pIemCpu), pCtx->dx, &u32Value, OP_SIZE / 8);
|
---|
1055 | else
|
---|
1056 | rcStrict = iemVerifyFakeIOPortRead(pIemCpu, pCtx->dx, &u32Value, OP_SIZE / 8);
|
---|
1057 | if (IOM_SUCCESS(rcStrict))
|
---|
1058 | {
|
---|
1059 | VBOXSTRICTRC rcStrict2 = iemMemCommitAndUnmap(pIemCpu, puMem, IEM_ACCESS_DATA_W);
|
---|
1060 | if (RT_LIKELY(rcStrict2 == VINF_SUCCESS))
|
---|
1061 | {
|
---|
1062 | if (!pCtx->eflags.Bits.u1DF)
|
---|
1063 | pCtx->ADDR_rDI += OP_SIZE / 8;
|
---|
1064 | else
|
---|
1065 | pCtx->ADDR_rDI -= OP_SIZE / 8;
|
---|
1066 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1067 | }
|
---|
1068 | /* iemMemMap already check permissions, so this may only be real errors
|
---|
1069 | or access handlers medling. The access handler case is going to
|
---|
1070 | cause misbehavior if the instruction is re-interpreted or smth. So,
|
---|
1071 | we fail with an internal error here instead. */
|
---|
1072 | else
|
---|
1073 | AssertLogRelFailedReturn(VERR_IEM_IPE_1);
|
---|
1074 | }
|
---|
1075 | return rcStrict;
|
---|
1076 | }
|
---|
1077 |
|
---|
1078 |
|
---|
1079 | /**
|
---|
1080 | * Implements 'REP INS'.
|
---|
1081 | */
|
---|
1082 | IEM_CIMPL_DEF_1(RT_CONCAT4(iemCImpl_rep_ins_op,OP_SIZE,_addr,ADDR_SIZE), bool, fIoChecked)
|
---|
1083 | {
|
---|
1084 | PVM pVM = IEMCPU_TO_VM(pIemCpu);
|
---|
1085 | PVMCPU pVCpu = IEMCPU_TO_VMCPU(pIemCpu);
|
---|
1086 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
1087 |
|
---|
1088 | /*
|
---|
1089 | * Setup.
|
---|
1090 | */
|
---|
1091 | uint16_t const u16Port = pCtx->dx;
|
---|
1092 | VBOXSTRICTRC rcStrict;
|
---|
1093 | if (!fIoChecked)
|
---|
1094 | {
|
---|
1095 | rcStrict = iemHlpCheckPortIOPermission(pIemCpu, pCtx, u16Port, OP_SIZE / 8);
|
---|
1096 | if (rcStrict != VINF_SUCCESS)
|
---|
1097 | return rcStrict;
|
---|
1098 | }
|
---|
1099 |
|
---|
1100 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
|
---|
1101 | if (uCounterReg == 0)
|
---|
1102 | {
|
---|
1103 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1104 | return VINF_SUCCESS;
|
---|
1105 | }
|
---|
1106 |
|
---|
1107 | uint64_t uBaseAddr;
|
---|
1108 | rcStrict = iemMemSegCheckWriteAccessEx(pIemCpu, &pCtx->es, X86_SREG_ES, &uBaseAddr);
|
---|
1109 | if (rcStrict != VINF_SUCCESS)
|
---|
1110 | return rcStrict;
|
---|
1111 |
|
---|
1112 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
|
---|
1113 | ADDR_TYPE uAddrReg = pCtx->ADDR_rDI;
|
---|
1114 |
|
---|
1115 | /*
|
---|
1116 | * Be careful with handle bypassing.
|
---|
1117 | */
|
---|
1118 | if (pIemCpu->fBypassHandlers)
|
---|
1119 | {
|
---|
1120 | Log(("%s: declining because we're bypassing handlers\n", __FUNCTION__));
|
---|
1121 | return VERR_IEM_ASPECT_NOT_IMPLEMENTED;
|
---|
1122 | }
|
---|
1123 |
|
---|
1124 | /*
|
---|
1125 | * The loop.
|
---|
1126 | */
|
---|
1127 | do
|
---|
1128 | {
|
---|
1129 | /*
|
---|
1130 | * Do segmentation and virtual page stuff.
|
---|
1131 | */
|
---|
1132 | ADDR2_TYPE uVirtAddr = uAddrReg + (ADDR2_TYPE)uBaseAddr;
|
---|
1133 | uint32_t cLeftPage = (PAGE_SIZE - (uVirtAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
1134 | if (cLeftPage > uCounterReg)
|
---|
1135 | cLeftPage = uCounterReg;
|
---|
1136 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
|
---|
1137 | && cbIncr > 0 /** @todo Implement reverse direction string ops. */
|
---|
1138 | && ( IS_64_BIT_CODE(pIemCpu)
|
---|
1139 | || ( uAddrReg < pCtx->es.u32Limit
|
---|
1140 | && uAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pCtx->es.u32Limit)
|
---|
1141 | )
|
---|
1142 | )
|
---|
1143 | {
|
---|
1144 | RTGCPHYS GCPhysMem;
|
---|
1145 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtAddr, IEM_ACCESS_DATA_W, &GCPhysMem);
|
---|
1146 | if (rcStrict != VINF_SUCCESS)
|
---|
1147 | return rcStrict;
|
---|
1148 |
|
---|
1149 | /*
|
---|
1150 | * If we can map the page without trouble, we would've liked to use
|
---|
1151 | * an string I/O method to do the work, but the current IOM
|
---|
1152 | * interface doesn't match our current approach. So, do a regular
|
---|
1153 | * loop instead.
|
---|
1154 | */
|
---|
1155 | /** @todo Change the I/O manager interface to make use of
|
---|
1156 | * mapped buffers instead of leaving those bits to the
|
---|
1157 | * device implementation! */
|
---|
1158 | PGMPAGEMAPLOCK PgLockMem;
|
---|
1159 | OP_TYPE *puMem;
|
---|
1160 | rcStrict = iemMemPageMap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_W, (void **)&puMem, &PgLockMem);
|
---|
1161 | if (rcStrict == VINF_SUCCESS)
|
---|
1162 | {
|
---|
1163 | uint32_t off = 0;
|
---|
1164 | while (off < cLeftPage)
|
---|
1165 | {
|
---|
1166 | uint32_t u32Value;
|
---|
1167 | if (!IEM_VERIFICATION_ENABLED(pIemCpu))
|
---|
1168 | rcStrict = IOMIOPortRead(pVM, pVCpu, u16Port, &u32Value, OP_SIZE / 8);
|
---|
1169 | else
|
---|
1170 | rcStrict = iemVerifyFakeIOPortRead(pIemCpu, u16Port, &u32Value, OP_SIZE / 8);
|
---|
1171 | if (IOM_SUCCESS(rcStrict))
|
---|
1172 | {
|
---|
1173 | puMem[off] = (OP_TYPE)u32Value;
|
---|
1174 | pCtx->ADDR_rDI = uAddrReg += cbIncr;
|
---|
1175 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
1176 | }
|
---|
1177 | if (rcStrict != VINF_SUCCESS)
|
---|
1178 | {
|
---|
1179 | if (IOM_SUCCESS(rcStrict))
|
---|
1180 | {
|
---|
1181 | rcStrict = iemSetPassUpStatus(pIemCpu, rcStrict);
|
---|
1182 | if (uCounterReg == 0)
|
---|
1183 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1184 | }
|
---|
1185 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_W, puMem, &PgLockMem);
|
---|
1186 | return rcStrict;
|
---|
1187 | }
|
---|
1188 | off++;
|
---|
1189 | }
|
---|
1190 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_W, puMem, &PgLockMem);
|
---|
1191 |
|
---|
1192 | /* If unaligned, we drop thru and do the page crossing access
|
---|
1193 | below. Otherwise, do the next page. */
|
---|
1194 | if (!(uVirtAddr & (OP_SIZE - 1)))
|
---|
1195 | continue;
|
---|
1196 | if (uCounterReg == 0)
|
---|
1197 | break;
|
---|
1198 | cLeftPage = 0;
|
---|
1199 | }
|
---|
1200 | }
|
---|
1201 |
|
---|
1202 | /*
|
---|
1203 | * Fallback - slow processing till the end of the current page.
|
---|
1204 | * In the cross page boundrary case we will end up here with cLeftPage
|
---|
1205 | * as 0, we execute one loop then.
|
---|
1206 | *
|
---|
1207 | * Note! We ASSUME the CPU will raise #PF or #GP before access the
|
---|
1208 | * I/O port, otherwise it wouldn't really be restartable.
|
---|
1209 | */
|
---|
1210 | /** @todo investigate what the CPU actually does with \#PF/\#GP
|
---|
1211 | * during INS. */
|
---|
1212 | do
|
---|
1213 | {
|
---|
1214 | OP_TYPE *puMem;
|
---|
1215 | rcStrict = iemMemMap(pIemCpu, (void **)&puMem, OP_SIZE / 8, X86_SREG_ES, uAddrReg, IEM_ACCESS_DATA_W);
|
---|
1216 | if (rcStrict != VINF_SUCCESS)
|
---|
1217 | return rcStrict;
|
---|
1218 |
|
---|
1219 | uint32_t u32Value = 0;
|
---|
1220 | if (!IEM_VERIFICATION_ENABLED(pIemCpu))
|
---|
1221 | rcStrict = IOMIOPortRead(pVM, pVCpu, u16Port, &u32Value, OP_SIZE / 8);
|
---|
1222 | else
|
---|
1223 | rcStrict = iemVerifyFakeIOPortRead(pIemCpu, u16Port, &u32Value, OP_SIZE / 8);
|
---|
1224 | if (!IOM_SUCCESS(rcStrict))
|
---|
1225 | return rcStrict;
|
---|
1226 |
|
---|
1227 | *puMem = (OP_TYPE)u32Value;
|
---|
1228 | VBOXSTRICTRC rcStrict2 = iemMemCommitAndUnmap(pIemCpu, puMem, IEM_ACCESS_DATA_W);
|
---|
1229 | AssertLogRelReturn(rcStrict2 == VINF_SUCCESS, VERR_IEM_IPE_1); /* See non-rep version. */
|
---|
1230 |
|
---|
1231 | pCtx->ADDR_rDI = uAddrReg += cbIncr;
|
---|
1232 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
1233 |
|
---|
1234 | cLeftPage--;
|
---|
1235 | if (rcStrict != VINF_SUCCESS)
|
---|
1236 | {
|
---|
1237 | if (uCounterReg == 0)
|
---|
1238 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1239 | rcStrict = iemSetPassUpStatus(pIemCpu, rcStrict);
|
---|
1240 | return rcStrict;
|
---|
1241 | }
|
---|
1242 | } while ((int32_t)cLeftPage > 0);
|
---|
1243 | } while (uCounterReg != 0);
|
---|
1244 |
|
---|
1245 | /*
|
---|
1246 | * Done.
|
---|
1247 | */
|
---|
1248 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1249 | return VINF_SUCCESS;
|
---|
1250 | }
|
---|
1251 |
|
---|
1252 |
|
---|
1253 | /**
|
---|
1254 | * Implements 'OUTS' (no rep)
|
---|
1255 | */
|
---|
1256 | IEM_CIMPL_DEF_2(RT_CONCAT4(iemCImpl_outs_op,OP_SIZE,_addr,ADDR_SIZE), uint8_t, iEffSeg, bool, fIoChecked)
|
---|
1257 | {
|
---|
1258 | PVM pVM = IEMCPU_TO_VM(pIemCpu);
|
---|
1259 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
1260 | VBOXSTRICTRC rcStrict;
|
---|
1261 |
|
---|
1262 | /*
|
---|
1263 | * ASSUMES the #GP for I/O permission is taken first, then any #GP for
|
---|
1264 | * segmentation and finally any #PF due to virtual address translation.
|
---|
1265 | * ASSUMES nothing is read from the I/O port before traps are taken.
|
---|
1266 | */
|
---|
1267 | if (!fIoChecked)
|
---|
1268 | {
|
---|
1269 | rcStrict = iemHlpCheckPortIOPermission(pIemCpu, pCtx, pCtx->dx, OP_SIZE / 8);
|
---|
1270 | if (rcStrict != VINF_SUCCESS)
|
---|
1271 | return rcStrict;
|
---|
1272 | }
|
---|
1273 |
|
---|
1274 | OP_TYPE uValue;
|
---|
1275 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uValue, iEffSeg, pCtx->ADDR_rSI);
|
---|
1276 | if (rcStrict == VINF_SUCCESS)
|
---|
1277 | {
|
---|
1278 | if (!IEM_VERIFICATION_ENABLED(pIemCpu))
|
---|
1279 | rcStrict = IOMIOPortWrite(pVM, IEMCPU_TO_VMCPU(pIemCpu), pCtx->dx, uValue, OP_SIZE / 8);
|
---|
1280 | else
|
---|
1281 | rcStrict = iemVerifyFakeIOPortWrite(pIemCpu, pCtx->dx, uValue, OP_SIZE / 8);
|
---|
1282 | if (IOM_SUCCESS(rcStrict))
|
---|
1283 | {
|
---|
1284 | if (!pCtx->eflags.Bits.u1DF)
|
---|
1285 | pCtx->ADDR_rSI += OP_SIZE / 8;
|
---|
1286 | else
|
---|
1287 | pCtx->ADDR_rSI -= OP_SIZE / 8;
|
---|
1288 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1289 | if (rcStrict != VINF_SUCCESS)
|
---|
1290 | rcStrict = iemSetPassUpStatus(pIemCpu, rcStrict);
|
---|
1291 | }
|
---|
1292 | }
|
---|
1293 | return rcStrict;
|
---|
1294 | }
|
---|
1295 |
|
---|
1296 |
|
---|
1297 | /**
|
---|
1298 | * Implements 'REP OUTS'.
|
---|
1299 | */
|
---|
1300 | IEM_CIMPL_DEF_2(RT_CONCAT4(iemCImpl_rep_outs_op,OP_SIZE,_addr,ADDR_SIZE), uint8_t, iEffSeg, bool, fIoChecked)
|
---|
1301 | {
|
---|
1302 | PVM pVM = IEMCPU_TO_VM(pIemCpu);
|
---|
1303 | PVMCPU pVCpu = IEMCPU_TO_VMCPU(pIemCpu);
|
---|
1304 | PCPUMCTX pCtx = pIemCpu->CTX_SUFF(pCtx);
|
---|
1305 |
|
---|
1306 | /*
|
---|
1307 | * Setup.
|
---|
1308 | */
|
---|
1309 | uint16_t const u16Port = pCtx->dx;
|
---|
1310 | VBOXSTRICTRC rcStrict;
|
---|
1311 | if (!fIoChecked)
|
---|
1312 | {
|
---|
1313 | rcStrict = iemHlpCheckPortIOPermission(pIemCpu, pCtx, u16Port, OP_SIZE / 8);
|
---|
1314 | if (rcStrict != VINF_SUCCESS)
|
---|
1315 | return rcStrict;
|
---|
1316 | }
|
---|
1317 |
|
---|
1318 | ADDR_TYPE uCounterReg = pCtx->ADDR_rCX;
|
---|
1319 | if (uCounterReg == 0)
|
---|
1320 | {
|
---|
1321 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1322 | return VINF_SUCCESS;
|
---|
1323 | }
|
---|
1324 |
|
---|
1325 | PCCPUMSELREGHID pHid = iemSRegGetHid(pIemCpu, iEffSeg);
|
---|
1326 | uint64_t uBaseAddr;
|
---|
1327 | rcStrict = iemMemSegCheckReadAccessEx(pIemCpu, pHid, iEffSeg, &uBaseAddr);
|
---|
1328 | if (rcStrict != VINF_SUCCESS)
|
---|
1329 | return rcStrict;
|
---|
1330 |
|
---|
1331 | int8_t const cbIncr = pCtx->eflags.Bits.u1DF ? -(OP_SIZE / 8) : (OP_SIZE / 8);
|
---|
1332 | ADDR_TYPE uAddrReg = pCtx->ADDR_rSI;
|
---|
1333 |
|
---|
1334 | /*
|
---|
1335 | * The loop.
|
---|
1336 | */
|
---|
1337 | do
|
---|
1338 | {
|
---|
1339 | /*
|
---|
1340 | * Do segmentation and virtual page stuff.
|
---|
1341 | */
|
---|
1342 | ADDR2_TYPE uVirtAddr = uAddrReg + (ADDR2_TYPE)uBaseAddr;
|
---|
1343 | uint32_t cLeftPage = (PAGE_SIZE - (uVirtAddr & PAGE_OFFSET_MASK)) / (OP_SIZE / 8);
|
---|
1344 | if (cLeftPage > uCounterReg)
|
---|
1345 | cLeftPage = uCounterReg;
|
---|
1346 | if ( cLeftPage > 0 /* can be null if unaligned, do one fallback round. */
|
---|
1347 | && cbIncr > 0 /** @todo Implement reverse direction string ops. */
|
---|
1348 | && ( IS_64_BIT_CODE(pIemCpu)
|
---|
1349 | || ( uAddrReg < pHid->u32Limit
|
---|
1350 | && uAddrReg + (cLeftPage * (OP_SIZE / 8)) <= pHid->u32Limit)
|
---|
1351 | )
|
---|
1352 | )
|
---|
1353 | {
|
---|
1354 | RTGCPHYS GCPhysMem;
|
---|
1355 | rcStrict = iemMemPageTranslateAndCheckAccess(pIemCpu, uVirtAddr, IEM_ACCESS_DATA_R, &GCPhysMem);
|
---|
1356 | if (rcStrict != VINF_SUCCESS)
|
---|
1357 | return rcStrict;
|
---|
1358 |
|
---|
1359 | /*
|
---|
1360 | * If we can map the page without trouble, we would've liked to use
|
---|
1361 | * an string I/O method to do the work, but the current IOM
|
---|
1362 | * interface doesn't match our current approach. So, do a regular
|
---|
1363 | * loop instead.
|
---|
1364 | */
|
---|
1365 | /** @todo Change the I/O manager interface to make use of
|
---|
1366 | * mapped buffers instead of leaving those bits to the
|
---|
1367 | * device implementation? */
|
---|
1368 | PGMPAGEMAPLOCK PgLockMem;
|
---|
1369 | OP_TYPE const *puMem;
|
---|
1370 | rcStrict = iemMemPageMap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, (void **)&puMem, &PgLockMem);
|
---|
1371 | if (rcStrict == VINF_SUCCESS)
|
---|
1372 | {
|
---|
1373 | uint32_t off = 0;
|
---|
1374 | while (off < cLeftPage)
|
---|
1375 | {
|
---|
1376 | uint32_t u32Value = *puMem++;
|
---|
1377 | if (!IEM_VERIFICATION_ENABLED(pIemCpu))
|
---|
1378 | rcStrict = IOMIOPortWrite(pVM, pVCpu, u16Port, u32Value, OP_SIZE / 8);
|
---|
1379 | else
|
---|
1380 | rcStrict = iemVerifyFakeIOPortWrite(pIemCpu, u16Port, u32Value, OP_SIZE / 8);
|
---|
1381 | if (IOM_SUCCESS(rcStrict))
|
---|
1382 | {
|
---|
1383 | pCtx->ADDR_rSI = uAddrReg += cbIncr;
|
---|
1384 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
1385 | }
|
---|
1386 | if (rcStrict != VINF_SUCCESS)
|
---|
1387 | {
|
---|
1388 | if (IOM_SUCCESS(rcStrict))
|
---|
1389 | {
|
---|
1390 | rcStrict = iemSetPassUpStatus(pIemCpu, rcStrict);
|
---|
1391 | if (uCounterReg == 0)
|
---|
1392 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1393 | }
|
---|
1394 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, puMem, &PgLockMem);
|
---|
1395 | return rcStrict;
|
---|
1396 | }
|
---|
1397 | off++;
|
---|
1398 | }
|
---|
1399 | iemMemPageUnmap(pIemCpu, GCPhysMem, IEM_ACCESS_DATA_R, puMem, &PgLockMem);
|
---|
1400 |
|
---|
1401 | /* If unaligned, we drop thru and do the page crossing access
|
---|
1402 | below. Otherwise, do the next page. */
|
---|
1403 | if (!(uVirtAddr & (OP_SIZE - 1)))
|
---|
1404 | continue;
|
---|
1405 | if (uCounterReg == 0)
|
---|
1406 | break;
|
---|
1407 | cLeftPage = 0;
|
---|
1408 | }
|
---|
1409 | }
|
---|
1410 |
|
---|
1411 | /*
|
---|
1412 | * Fallback - slow processing till the end of the current page.
|
---|
1413 | * In the cross page boundrary case we will end up here with cLeftPage
|
---|
1414 | * as 0, we execute one loop then.
|
---|
1415 | *
|
---|
1416 | * Note! We ASSUME the CPU will raise #PF or #GP before access the
|
---|
1417 | * I/O port, otherwise it wouldn't really be restartable.
|
---|
1418 | */
|
---|
1419 | /** @todo investigate what the CPU actually does with \#PF/\#GP
|
---|
1420 | * during INS. */
|
---|
1421 | do
|
---|
1422 | {
|
---|
1423 | OP_TYPE uValue;
|
---|
1424 | rcStrict = RT_CONCAT(iemMemFetchDataU,OP_SIZE)(pIemCpu, &uValue, iEffSeg, uAddrReg);
|
---|
1425 | if (rcStrict != VINF_SUCCESS)
|
---|
1426 | return rcStrict;
|
---|
1427 |
|
---|
1428 | if (!IEM_VERIFICATION_ENABLED(pIemCpu))
|
---|
1429 | rcStrict = IOMIOPortWrite(pVM, pVCpu, u16Port, uValue, OP_SIZE / 8);
|
---|
1430 | else
|
---|
1431 | rcStrict = iemVerifyFakeIOPortWrite(pIemCpu, u16Port, uValue, OP_SIZE / 8);
|
---|
1432 | if (IOM_SUCCESS(rcStrict))
|
---|
1433 | {
|
---|
1434 | pCtx->ADDR_rSI = uAddrReg += cbIncr;
|
---|
1435 | pCtx->ADDR_rCX = --uCounterReg;
|
---|
1436 | cLeftPage--;
|
---|
1437 | }
|
---|
1438 | if (rcStrict != VINF_SUCCESS)
|
---|
1439 | {
|
---|
1440 | if (IOM_SUCCESS(rcStrict))
|
---|
1441 | {
|
---|
1442 | if (uCounterReg == 0)
|
---|
1443 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1444 | rcStrict = iemSetPassUpStatus(pIemCpu, rcStrict);
|
---|
1445 | }
|
---|
1446 | return rcStrict;
|
---|
1447 | }
|
---|
1448 | } while ((int32_t)cLeftPage > 0);
|
---|
1449 | } while (uCounterReg != 0);
|
---|
1450 |
|
---|
1451 | /*
|
---|
1452 | * Done.
|
---|
1453 | */
|
---|
1454 | iemRegAddToRipAndClearRF(pIemCpu, cbInstr);
|
---|
1455 | return VINF_SUCCESS;
|
---|
1456 | }
|
---|
1457 |
|
---|
1458 | #endif /* OP_SIZE != 64-bit */
|
---|
1459 |
|
---|
1460 |
|
---|
1461 | #undef OP_rAX
|
---|
1462 | #undef OP_SIZE
|
---|
1463 | #undef ADDR_SIZE
|
---|
1464 | #undef ADDR_rDI
|
---|
1465 | #undef ADDR_rSI
|
---|
1466 | #undef ADDR_rCX
|
---|
1467 | #undef ADDR_rIP
|
---|
1468 | #undef ADDR2_TYPE
|
---|
1469 | #undef ADDR_TYPE
|
---|
1470 | #undef ADDR2_TYPE
|
---|
1471 | #undef IS_64_BIT_CODE
|
---|