diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/x86/emulenv.cc | 92 | ||||
| -rw-r--r-- | src/arch/x86/emulenv.hh | 90 |
2 files changed, 182 insertions, 0 deletions
diff --git a/src/arch/x86/emulenv.cc b/src/arch/x86/emulenv.cc new file mode 100644 index 000000000..e3f703cff --- /dev/null +++ b/src/arch/x86/emulenv.cc @@ -0,0 +1,92 @@ +/* + * 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 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 + * 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Gabe Black + */ + +#include "arch/x86/emulenv.hh" +#include "base/misc.hh" + +using namespace X86ISA; + +void EmulEnv::doModRM(const ExtMachInst & machInst) +{ + assert(machInst.modRM.mod != 3); + //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; + //In this special case, we don't use a base. The displacement also + //changes, but that's managed by the predecoder. + 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) + index = NUM_INTREGS; + } else { + if (machInst.addrSize == 2) { + warn("I'm not really using 16 bit MODRM like I'm supposed to!\n"); + } else { + scale = 0; + base = machInst.modRM.rm; + if (machInst.modRM.mod == 0 && machInst.modRM.rm == 5) { + base = NUM_INTREGS; + if (machInst.mode.submode == SixtyFourBitMode) + base = NUM_INTREGS+7; + } + } + } +} + diff --git a/src/arch/x86/emulenv.hh b/src/arch/x86/emulenv.hh new file mode 100644 index 000000000..66c56fb79 --- /dev/null +++ b/src/arch/x86/emulenv.hh @@ -0,0 +1,90 @@ +/* + * 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 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 + * 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Gabe Black + */ + +#ifndef __ARCH_X86_EMULENV_HH__ +#define __ARCH_X86_EMULENV_HH__ + +#include "arch/x86/types.hh" +#include "arch/x86/intregs.hh" + +namespace X86ISA +{ + struct EmulEnv + { + RegIndex reg; + RegIndex regm; + uint8_t scale; + RegIndex index; + RegIndex base; + int dataSize; + int addressSize; + int stackSize; + + EmulEnv(RegIndex _reg, RegIndex _regm, + int _dataSize, int _addressSize, int _stackSize) : + reg(_reg), regm(_regm), + scale(0), index(NUM_INTREGS), + base(NUM_INTREGS), + dataSize(_dataSize), addressSize(_addressSize), + stackSize(_stackSize) + {;} + + void doModRM(const ExtMachInst & machInst); + }; +}; + +#endif // __ARCH_X86_TYPES_HH__ |