src/arch/x86/insts/static_inst.cc

   1 /*
   2  * Copyright (c) 2007 The Hewlett-Packard Development Company
   3  * All rights reserved.
   4  *
   5  * Redistribution and use of this software in source and binary forms,
   6  * with or without modification, are permitted provided that the
   7  * following conditions are met:
   8  *
   9  * The software must be used only for Non-Commercial Use which means any
  10  * use which is NOT directed to receiving any direct monetary
  11  * compensation for, or commercial advantage from such use.  Illustrative
  12  * examples of non-commercial use are academic research, personal study,
  13  * teaching, education and corporate research & development.
  14  * Illustrative examples of commercial use are distributing products for
  15  * commercial advantage and providing services using the software for
  16  * commercial advantage.
  17  *
  18  * If you wish to use this software or functionality therein that may be
  19  * covered by patents for commercial use, please contact:
  20  *     Director of Intellectual Property Licensing
  21  *     Office of Strategy and Technology
  22  *     Hewlett-Packard Company
  23  *     1501 Page Mill Road
  24  *     Palo Alto, California  94304
  25  *
  26  * Redistributions of source code must retain the above copyright notice,
  27  * this list of conditions and the following disclaimer.  Redistributions
  28  * in binary form must reproduce the above copyright notice, this list of
  29  * conditions and the following disclaimer in the documentation and/or
  30  * other materials provided with the distribution.  Neither the name of
  31  * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
  32  * contributors may be used to endorse or promote products derived from
  33  * this software without specific prior written permission.  No right of
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  35  * output created using the software may be prepared, but only for
  36  * Non-Commercial Uses.  Derivatives of the software may be shared with
  37  * others provided: (i) the others agree to abide by the list of
  38  * conditions herein which includes the Non-Commercial Use restrictions;
  39  * and (ii) such Derivatives of the software include the above copyright
  40  * notice to acknowledge the contribution from this software where
  41  * applicable, this list of conditions and the disclaimer below.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  44  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  45  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  46  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  47  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  48  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  49  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  52  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  53  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  54  *
  55  * Authors: Gabe Black
  56  */
  57
  58 #include "arch/x86/insts/static_inst.hh"
  59 #include "arch/x86/segmentregs.hh"
  60
  61 namespace X86ISA
  62 {
  63     void X86StaticInst::printMnemonic(std::ostream &os,
  64             const char * mnemonic) const
  65     {
  66         ccprintf(os, "  %s   ", mnemonic);
  67     }
  68
  69     void X86StaticInst::printMnemonic(std::ostream &os,
  70             const char * instMnemonic, const char * mnemonic) const
  71     {
  72         ccprintf(os, "  %s : %s   ", instMnemonic, mnemonic);
  73     }
  74
  75     void X86StaticInst::printSegment(std::ostream &os, int segment) const
  76     {
  77         switch (segment)
  78         {
  79           case SEGMENT_REG_ES:
  80             ccprintf(os, "ES");
  81             break;
  82           case SEGMENT_REG_CS:
  83             ccprintf(os, "CS");
  84             break;
  85           case SEGMENT_REG_SS:
  86             ccprintf(os, "SS");
  87             break;
  88           case SEGMENT_REG_DS:
  89             ccprintf(os, "DS");
  90             break;
  91           case SEGMENT_REG_FS:
  92             ccprintf(os, "FS");
  93             break;
  94           case SEGMENT_REG_GS:
  95             ccprintf(os, "GS");
  96             break;
  97           case SEGMENT_REG_HS:
  98             ccprintf(os, "HS");
  99             break;
 100           case SEGMENT_REG_TSL:
 101             ccprintf(os, "TSL");
 102             break;
 103           case SEGMENT_REG_TSG:
 104             ccprintf(os, "TSG");
 105             break;
 106           case SEGMENT_REG_LS:
 107             ccprintf(os, "LS");
 108             break;
 109           case SEGMENT_REG_MS:
 110             ccprintf(os, "MS");
 111             break;
 112           case SYS_SEGMENT_REG_TR:
 113             ccprintf(os, "TR");
 114             break;
 115           case SYS_SEGMENT_REG_IDTR:
 116             ccprintf(os, "IDTR");
 117             break;
 118           default:
 119             panic("Unrecognized segment %d\n", segment);
 120         }
 121     }
 122
 123     void
 124     X86StaticInst::printSrcReg(std::ostream &os, int reg, int size) const
 125     {
 126         if(_numSrcRegs > reg)
 127             printReg(os, _srcRegIdx[reg], size);
 128     }
 129
 130     void
 131     X86StaticInst::printDestReg(std::ostream &os, int reg, int size) const
 132     {
 133         if(_numDestRegs > reg)
 134             printReg(os, _destRegIdx[reg], size);
 135     }
 136
 137     void
 138     X86StaticInst::printReg(std::ostream &os, int reg, int size) const
 139     {
 140         assert(size == 1 || size == 2 || size == 4 || size == 8);
 141         static const char * abcdFormats[9] =
 142             {"", "%s",  "%sx",  "", "e%sx", "", "", "", "r%sx"};
 143         static const char * piFormats[9] =
 144             {"", "%s",  "%s",   "", "e%s",  "", "", "", "r%s"};
 145         static const char * longFormats[9] =
 146             {"", "r%sb", "r%sw", "", "r%sd", "", "", "", "r%s"};
 147         static const char * microFormats[9] =
 148             {"", "t%db", "t%dw", "", "t%dd", "", "", "", "t%d"};
 149
 150         if (reg < FP_Base_DepTag) {
 151             const char * suffix = "";
 152             bool fold = reg & IntFoldBit;
 153             reg &= ~IntFoldBit;
 154
 155             if(fold)
 156                 suffix = "h";
 157             else if(reg < 8 && size == 1)
 158                 suffix = "l";
 159
 160             switch (reg) {
 161               case INTREG_RAX:
 162                 ccprintf(os, abcdFormats[size], "a");
 163                 break;
 164               case INTREG_RBX:
 165                 ccprintf(os, abcdFormats[size], "b");
 166                 break;
 167               case INTREG_RCX:
 168                 ccprintf(os, abcdFormats[size], "c");
 169                 break;
 170               case INTREG_RDX:
 171                 ccprintf(os, abcdFormats[size], "d");
 172                 break;
 173               case INTREG_RSP:
 174                 ccprintf(os, piFormats[size], "sp");
 175                 break;
 176               case INTREG_RBP:
 177                 ccprintf(os, piFormats[size], "bp");
 178                 break;
 179               case INTREG_RSI:
 180                 ccprintf(os, piFormats[size], "si");
 181                 break;
 182               case INTREG_RDI:
 183                 ccprintf(os, piFormats[size], "di");
 184                 break;
 185               case INTREG_R8W:
 186                 ccprintf(os, longFormats[size], "8");
 187                 break;
 188               case INTREG_R9W:
 189                 ccprintf(os, longFormats[size], "9");
 190                 break;
 191               case INTREG_R10W:
 192                 ccprintf(os, longFormats[size], "10");
 193                 break;
 194               case INTREG_R11W:
 195                 ccprintf(os, longFormats[size], "11");
 196                 break;
 197               case INTREG_R12W:
 198                 ccprintf(os, longFormats[size], "12");
 199                 break;
 200               case INTREG_R13W:
 201                 ccprintf(os, longFormats[size], "13");
 202                 break;
 203               case INTREG_R14W:
 204                 ccprintf(os, longFormats[size], "14");
 205                 break;
 206               case INTREG_R15W:
 207                 ccprintf(os, longFormats[size], "15");
 208                 break;
 209               default:
 210                 ccprintf(os, microFormats[size], reg - NUM_INTREGS);
 211             }
 212             ccprintf(os, suffix);
 213         } else if (reg < Ctrl_Base_DepTag) {
 214             int fpindex = reg - FP_Base_DepTag;
 215             if(fpindex < NumMMXRegs) {
 216                 ccprintf(os, "%%mmx%d", reg - FP_Base_DepTag);
 217                 return;
 218             }
 219             fpindex -= NumMMXRegs;
 220             if(fpindex < NumXMMRegs * 2) {
 221                 ccprintf(os, "%%xmm%d_%s", fpindex / 2,
 222                         (fpindex % 2) ? "high": "low");
 223                 return;
 224             }
 225             fpindex -= NumXMMRegs * 2;
 226             if(fpindex < NumMicroFpRegs) {
 227                 ccprintf(os, "%%ufp%d", fpindex);
 228                 return;
 229             }
 230             fpindex -= NumMicroFpRegs;
 231             ccprintf(os, "%%st(%d)", fpindex);
 232         } else {
 233             switch (reg - Ctrl_Base_DepTag) {
 234               default:
 235                 ccprintf(os, "%%ctrl%d", reg - Ctrl_Base_DepTag);
 236             }
 237         }
 238     }
 239
 240     void X86StaticInst::printMem(std::ostream &os, uint8_t segment,
 241             uint8_t scale, RegIndex index, RegIndex base,
 242             uint64_t disp, uint8_t addressSize, bool rip) const
 243     {
 244         bool someAddr = false;
 245         printSegment(os, segment);
 246         os << ":[";
 247         if (rip) {
 248             os << "rip";
 249             someAddr = true;
 250         } else {
 251             if (scale != 0 && index != ZeroReg)
 252             {
 253                 if(scale != 1)
 254                     ccprintf(os, "%d*", scale);
 255                 printReg(os, index, addressSize);
 256                 someAddr = true;
 257             }
 258             if (base != ZeroReg)
 259             {
 260                 if(someAddr)
 261                     os << " + ";
 262                 printReg(os, base, addressSize);
 263                 someAddr = true;
 264             }
 265         }
 266         if (disp != 0)
 267         {
 268             if(someAddr)
 269                 os << " + ";
 270             ccprintf(os, "%#x", disp);
 271             someAddr = true;
 272         }
 273         if (!someAddr)
 274             os << "0";
 275         os << "]";
 276     }
 277
 278     std::string X86StaticInst::generateDisassembly(Addr pc,
 279         const SymbolTable *symtab) const
 280     {
 281         std::stringstream ss;
 282
 283         printMnemonic(ss, mnemonic);
 284
 285         return ss.str();
 286     }
 287 }