Read e-book online A Systematic Catalogue of Reusable Abstract Data Types PDF

By Jürgen Uhl, Hans A. Schmid

ISBN-10: 0387532293

ISBN-13: 9780387532295

ISBN-10: 3540532293

ISBN-13: 9783540532293

This ebook provides a entire catalogue of hassle-free information forms like units, maps, orders, bushes and lists, written in Ada. Such facts kinds are usually utilized in structures programming. the key concentration is on: - a uniform syntactic and semantic interface for all information forms, - many implementation variations consistent with facts variety, all ac cessible via a unmarried interface, - a hierarchical method of the knowledge kinds as a foundation for info style choice and implementation. assembly those targets is the most success of the publication. the combo of effective applicability and simplicity of studying and upkeep is accomplished by means of the conscientiously elaborated interfaces of the catalogue's info forms. those interfaces mix abstraction, that is invaluable for simple studying and for leaving implementation freedom, and useful completeness, that's a necessary prerequisite for prime functionality in numerous software contexts. the choice of the ideal facts kind implementation for a given context is supported through the information kind hierarchy which imposes varied abstraction degrees, and an orthogonal scheme of implementation editions that are freely mixed. including the uniformity of interfaces, the hierarchical composition of results in a small code base, from which diversified implementation variations are generated utilizing a macro processor.

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This is repeated until Si and 5(1+1) are identical. In case of multiple paths through the loop, the algorithm is extended by collecting one exit state Si for each path and then comparing all pairs of states. Whenever a difference between a register value or a memory location is found, this location is set to ± . The iterative algorithm is guaranteed to terminate, because at each step, it is only possible to convert the content of a memory location or a register to _L. Thus, after each iteration, the states are either identical or the content of some locations is made unknown.

In particular, the goal of security analysis is to identify either malicious behavior or the presence of security flaws, which might be exploited to compromise the security of a system. In this chapter, we focus particularly on the security analysis of binary programs that use the Intel x86 instruction set. However, many of the concepts can also be applied to analyze code that exists in a different representation. In the first step of the analysis, the code has to be disassembled. That is, we want to recover a symbolic representation of a program's machine code instructions from its binary representation.

In [13], Linn and Debray introduced novel obfuscation techniques that exploit the fact that the Intel x86 instruction set architecture contains variable length instructions that can start at arbitrary memory address. By inserting padding bytes at locations that cannot be reached during run-time, disassemblers can be confused to misinterpret large parts of the binary. Although their approach is limited to Intel x86 2 Static Disassembly and Code Analysis 21 binaries, the obfuscation results against current state-of-the-art disassemblers are remarkable.

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A Systematic Catalogue of Reusable Abstract Data Types by Jürgen Uhl, Hans A. Schmid

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