Constructing control flows graphs of binary executable programs at post-link time
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United States of America Patent
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Apr 17, 2007
Grant Date -
Mar 17, 2005
app pub date -
Aug 29, 2003
filing date -
Aug 29, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and a system for constructing a control flow graph (CFG, 106) from an executable computer program (104). The solution detects data intermixed with instructions and instruction set changes. The method includes the steps of defining block leader types specifying basic block boundaries in the program (104), building a CFG structure (106) according to the basic blocks found in the program, and adding control flow and addressing information to the CFG (106) by propagating through the basic blocks and internals thereof. The CFG (106) may be then optimised (108) and a compacted executable (112) created as a result.
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