* Copyright (c) 2007 The Hewlett-Packard Development Company
* All rights reserved.
*
- * Redistribution and use of this software in source and binary forms,
- * with or without modification, are permitted provided that the
- * following conditions are met:
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder. You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
*
- * The software must be used only for Non-Commercial Use which means any
- * use which is NOT directed to receiving any direct monetary
- * compensation for, or commercial advantage from such use. Illustrative
- * examples of non-commercial use are academic research, personal study,
- * teaching, education and corporate research & development.
- * Illustrative examples of commercial use are distributing products for
- * commercial advantage and providing services using the software for
- * commercial advantage.
- *
- * If you wish to use this software or functionality therein that may be
- * covered by patents for commercial use, please contact:
- * Director of Intellectual Property Licensing
- * Office of Strategy and Technology
- * Hewlett-Packard Company
- * 1501 Page Mill Road
- * Palo Alto, California 94304
- *
- * Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer. Redistributions
- * in binary form must reproduce the above copyright notice, this list of
- * conditions and the following disclaimer in the documentation and/or
- * other materials provided with the distribution. Neither the name of
- * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission. No right of
- * sublicense is granted herewith. Derivatives of the software and
- * output created using the software may be prepared, but only for
- * Non-Commercial Uses. Derivatives of the software may be shared with
- * others provided: (i) the others agree to abide by the list of
- * conditions herein which includes the Non-Commercial Use restrictions;
- * and (ii) such Derivatives of the software include the above copyright
- * notice to acknowledge the contribution from this software where
- * applicable, this list of conditions and the disclaimer below.
+ * this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
*/
#include "arch/x86/emulenv.hh"
-#include "base/misc.hh"
+
+#include <cassert>
+
+#include "base/logging.hh"
using namespace X86ISA;
//Use the SIB byte for addressing if the modrm byte calls for it.
if (machInst.modRM.rm == 4 && machInst.addrSize != 2) {
scale = 1 << machInst.sib.scale;
- index = machInst.sib.index;
- base = machInst.sib.base;
+ index = machInst.sib.index | (machInst.rex.x << 3);
+ base = machInst.sib.base | (machInst.rex.b << 3);
//In this special case, we don't use a base. The displacement also
- //changes, but that's managed by the predecoder.
+ //changes, but that's managed by the decoder.
if (machInst.sib.base == INTREG_RBP && machInst.modRM.mod == 0)
base = NUM_INTREGS;
//In -this- special case, we don't use an index.
- if (machInst.sib.index == INTREG_RSP)
+ if (index == INTREG_RSP)
index = NUM_INTREGS;
} else {
if (machInst.addrSize == 2) {
- warn("I'm not really using 16 bit MODRM like I'm supposed to!\n");
+ unsigned rm = machInst.modRM.rm;
+ if (rm <= 3) {
+ scale = 1;
+ if (rm < 2) {
+ base = INTREG_RBX;
+ } else {
+ base = INTREG_RBP;
+ }
+ index = (rm % 2) ? INTREG_RDI : INTREG_RSI;
+ } else {
+ scale = 0;
+ switch (rm) {
+ case 4:
+ base = INTREG_RSI;
+ break;
+ case 5:
+ base = INTREG_RDI;
+ break;
+ case 6:
+ base = INTREG_RBP;
+ break;
+ case 7:
+ base = INTREG_RBX;
+ break;
+ }
+ }
} else {
scale = 0;
- base = machInst.modRM.rm;
+ base = machInst.modRM.rm | (machInst.rex.b << 3);
if (machInst.modRM.mod == 0 && machInst.modRM.rm == 5) {
+ //Since we need to use a different encoding of this
+ //instruction anyway, just ignore the base in those cases
base = NUM_INTREGS;
- if (machInst.mode.submode == SixtyFourBitMode)
- base = NUM_INTREGS+7;
}
}
}
+ //Figure out what segment to use. This won't be entirely accurate since
+ //the presence of a displacement is supposed to make the instruction
+ //default to the data segment.
+ if ((base != INTREG_RBP && base != INTREG_RSP) || machInst.dispSize) {
+ seg = SEGMENT_REG_DS;
+ //Handle any segment override that might have been in the instruction
+ int segFromInst = machInst.legacy.seg;
+ if (segFromInst)
+ seg = (SegmentRegIndex)(segFromInst - 1);
+ } else {
+ seg = SEGMENT_REG_SS;
+ }
}
+void EmulEnv::setSeg(const ExtMachInst & machInst)
+{
+ seg = SEGMENT_REG_DS;
+ //Handle any segment override that might have been in the instruction
+ int segFromInst = machInst.legacy.seg;
+ if (segFromInst)
+ seg = (SegmentRegIndex)(segFromInst - 1);
+}
projects / gem5.git / blobdiff