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Question

How is the OR operator implemented in GCC and several other compilers?

a.

using a conditional jump for each condition and adding a final jump that skips the conditional code block if neither conditions are met

b.

using only the second condition, which is reversed and pointed at the code after the conditional block, while the first condition still points to the conditional block itself

c.

adding extra conditional jumps that go to the conditional block for each condition connected using an OR operator

d.

using an unconditional jump after the final conditional branch instruction

Posted under Reverse Engineering

Answer: (a).using a conditional jump for each condition and adding a final jump that skips the conditional code block if neither conditions are met Explanation:The OR operator is implemented in GCC and several other compilers using a conditional jump for each condition (without reversing the conditions) and adding a final jump that skips the conditional code block if neither conditions are met.

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Q. How is the OR operator implemented in GCC and several other compilers?

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