arch/x86/decoder.cc

50     emi.rex = 0;
51     emi.legacy = 0;
52     emi.vex = 0;
54     emi.opcode.type = BadOpcode;
55     emi.opcode.op = 0;
58     emi.immediate = 0;
59     emi.displacement = 0;
60     emi.dispSize = 0;
62     emi.modRM = 0;
63     emi.sib = 0;
183     if (prefix == RexPrefix && emi.mode.submode != SixtyFourBitMode)
192         emi.legacy.op = true;
196         emi.legacy.addr = true;
206         emi.legacy.seg = prefix;
210         emi.legacy.lock = true;
214         emi.legacy.rep = true;
218         emi.legacy.repne = true;
222         emi.rex = nextByte;
226         emi.vex.present = 1;
231         emi.vex.present = 1;
250     emi.rex.r = !vex.r;
252     emi.vex.l = vex.l;
253     emi.vex.v = ~vex.v;
259         emi.legacy.op = 1;
262         emi.legacy.rep = 1;
265         emi.legacy.repne = 1;
269     emi.opcode.type = TwoByteOpcode;
277     if (emi.mode.submode != SixtyFourBitMode && bits(nextByte, 7, 6) == 0x3) {
279         emi.vex.present = 0;
280         emi.opcode.type = OneByteOpcode;
281         emi.opcode.op = 0xC4;
289     emi.rex.r = !vex.r;
290     emi.rex.x = !vex.x;
291     emi.rex.b = !vex.b;
295         emi.opcode.type = TwoByteOpcode;
298         emi.opcode.type = ThreeByte0F38Opcode;
301         emi.opcode.type = ThreeByte0F3AOpcode;
307         emi.opcode.type = TwoByteOpcode;
308         emi.opcode.op = 0x0B;
318     if (emi.mode.submode != SixtyFourBitMode && bits(nextByte, 7, 6) == 0x3) {
320         emi.vex.present = 0;
321         emi.opcode.type = OneByteOpcode;
322         emi.opcode.op = 0xC5;
330     emi.rex.w = vex.w;
332     emi.vex.l = vex.l;
333     emi.vex.v = ~vex.v;
339         emi.legacy.op = 1;
342         emi.legacy.rep = 1;
345         emi.legacy.repne = 1;
357     emi.opcode.op = nextByte;
360     switch (emi.opcode.type) {
370         panic("Unrecognized opcode type %d.\n", emi.opcode.type);
387         emi.opcode.type = OneByteOpcode;
388         emi.opcode.op = nextByte;
411         emi.opcode.type = TwoByteOpcode;
412         emi.opcode.op = nextByte;
427     emi.opcode.type = ThreeByte0F38Opcode;
428     emi.opcode.op = nextByte;
441     emi.opcode.type = ThreeByte0F3AOpcode;
442     emi.opcode.op = nextByte;
454     const uint8_t opcode = emi.opcode.op;
459     if (emi.rex.w)
461     else if (emi.legacy.op)
467     emi.opSize = 1 << logOpSize;
472     if (emi.legacy.addr)
478     emi.addrSize = 1 << logAddrSize;
482     emi.stackSize = 1 << stack;
535     if (emi.opcode.type == OneByteOpcode && (modRM.reg & 0x6) == 0) {
536        if (emi.opcode.op == 0xF6)
538        else if (emi.opcode.op == 0xF7)
539            immediateSize = (emi.opSize == 8) ? 4 : emi.opSize;
557     emi.modRM = modRM;
568     emi.sib = nextByte;
571     if (emi.modRM.mod == 0 && emi.sib.base == 5)
592             emi.displacement,
605             emi.displacement = sext<8>(emi.displacement);
608             emi.displacement = sext<16>(emi.displacement);
611             emi.displacement = sext<32>(emi.displacement);
617                 emi.displacement);
625         emi.dispSize = displacementSize;
640             emi.immediate,
662             emi.immediate = sext<32>(emi.immediate);
665             emi.immediate = sext<8>(emi.immediate);
669                 emi.immediate);
733     si = decode(emi, origPC);