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A comment on Main is usually a function, so when is it not? (2015). Parent comment

Re:Main is usually a function, so when is it not? (2015) by kaushiks on Sunday September 10, 2017 @04:12PM (#15214093)
This has nothing to do with memory. The x86_64 ABI returns values from functions in the RAX register.
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Re:Main is usually a function, so when is it not? (2015) by albinofrenchy on Sunday September 10, 2017 @04:45PM (#15214243)
Sure; same point applies though -- just because 0 happens to be in RAX doesn't mean it's defined behavior.
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