Electrical computers and digital processing systems: interprogra – Dynamic linking – late binding
Reexamination Certificate
2000-09-21
2004-09-14
Lee, Thomas (Department: 2126)
Electrical computers and digital processing systems: interprogra
Dynamic linking, late binding
C719S332000
Reexamination Certificate
active
06792612
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns dynamic code down load and linking in resource constraint Java runtime environments, such as in JavaCards for example.
2. Description of Related Art
In a conventional Java system, references to class structures (internal and external) are resolved using indirect name lookup via a so-called constant pool. Such an approach can only be used in a system providing sufficient resources in terms of processing power and internal resources.
In a resource constraint runtime system (e.g. a JavaCard) this approach is not promising. Instead, one might use resolved references to class structures, such that indirections are obviated and maintaining the constant pool can be avoided.
BRIEF SUMMARY OF THE INVENTION
The resolving of the references (linking) is subject of the present invention.
It is an object of the present invention to achieve efficient linking in resource constraint Java runtime environments.
It is an object of the present invention to achieve space and runtime efficient linking in resource constraint Java runtime environments.
REFERENCES:
patent: 5291601 (1994-03-01), Sands
patent: 5581768 (1996-12-01), Garney et al.
patent: 6112025 (2000-08-01), Mulchandani et al.
patent: 6308317 (2001-10-01), Wilkinson et al.
patent: 6366876 (2002-04-01), Looney
patent: 0 810 522 (1997-12-01), None
Sun Microsystems,Java Card 2.0 Language Subset and Virtual Machine Specificationproduct brochure, Oct. 13, 1997 Revision 1.0 Final.
IBM Technical Disclosure Bulletin,Title: C Inter-Linkage Invocation Method,Sep. 1, 1992, pp. 44-49.
Baentsch Michael
Buhler Peter
Oestreicher Marcus
August Casey P.
Cao Diem K.
Lee Thomas
Ohlandt Greeley Ruggiero & Perle L.L.P.
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