US Patent No: 8,196,120

Number of patents in Portfolio can not be more than 2000

Computer emulator employing direct execution of compiled functions

ALSO PUBLISHED AS: 20090094015

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Abstract

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An emulation system that provides the functionality of an emulated computer on a host computer pre-processes the object code file to be emulated to reduce the run-time overhead due to parsing the object code. The emulator uses pre-programmed functions that model each instruction of the emulated computer. An object code file is pre-parsed to generate a translated file which includes a sequence of function calls corresponding to the sequence of instructions in the code file. The translated file is compiled to generate a corresponding translated object-code file. The translated object-code file is executed in the emulation environment on the host computer. The emulation system also includes a standard mode in which the object code file is emulated by sequentially parsing each instruction in the object code file and invoking an appropriate one of the preprogrammed functions in the emulated environment.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
UNISYS CORPORATIONBLUE BELL, PA1325

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Irving, Michael James Mission Viejo, CA 9 12
Meyers, Robert Joseph - 11 8

Cited Art Landscape

Patent Info (Count) # Cites Year
 
UNISYS CORPORATION (7)
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* 5,896,522 Selective emulation interpretation using transformed instructions 24 1996
* 5,966,515 Parallel emulation system and method 8 1996
* 6,128,679 Computer for executing I/O instructions, by emulation, in a foreign application program wherein the emulator result thread is blocked from running between processes 9 1998
* 6,141,635 Method of diagnosing faults in an emulated computer system via a heterogeneous diagnostic program 6 1998
* 6,351,782 Method of sharing an I/O device between a host operating system and a foreign operating system in a single computer 8 1999
 
APPLE INC. (2)
* 5,781,758 Software emulation system with reduced memory requirements 56 1995
* 5,751,982 Software emulation system with dynamic translation of emulated instructions for increased processing speed 86 1995
 
Bull HN Information Systems Inc. (2)
* 5,664,098 Dual decor capability for a host system which runs emulated application programs to enable direct access to host facilities for executing emulated system operations 30 1994
* 6,457,171 Storage structure for dynamic management of translated code blocks in dynamic object code translation 10 1999
 
ADVANCED MICRO DEVICES, INC. (1)
* 6,480,952 Emulation coprocessor 52 1998
 
Amdahl Corporation (1)
* 5,210,832 Multiple domain emulation system with separate domain facilities which tests for emulated instruction exceptions before completion of operand fetch cycle 24 1991
 
BILL INFORMATION SYSTEMS INC. (1)
* 6,516,295 Method and apparatus for emulating self-modifying code 11 1999
 
BULL INFORMATION SYSTEMS INC. (1)
* 6,529,862 Method and apparatus for dynamic management of translated code blocks in dynamic object code translation 24 1999
 
FUJITSU LIMITED (1)
* 6,463,582 Dynamic optimizing object code translator for architecture emulation and dynamic optimizing object code translation method 252 1998
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
* 6,907,519 Systems and methods for integrating emulated and native code 33 2002
 
KABUSHIKI KAISHA TOSHIBA (1)
* 5,432,935 Emulation for executing a second language application program on a computer having a first language operating system 24 1991
 
Unisys (1)
* 5,077,657 Emulator Assist unit which forms addresses of user instruction operands in response to emulator assist unit commands from host processor 42 1989
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
* 8,826,245 Method, system and program product for optimizing emulation of a suspected malware 0 2013
* Cited By Examiner

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