Question

Why is data-flow analysis required to understand function return values?

a.

Different compilers might use different conventions for passing return values.

b.

Function return values are not important in decompilation.

c.

Decompilers cannot understand the concept of return values.

d.

None of the above.

Posted under Reverse Engineering

Answer: (a).Different compilers might use different conventions for passing return values. Explanation:Different compilers might use different conventions for passing return values, and data-flow analysis is required to know which register is used for passing back return values and which registers are used for passing parameters into a procedure.

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