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> Roland McGrath wrote: > > I don't understand this. Its use is to check whether another frame's auto > > variable address might be below (off the top) of the current stack. > > I've no time to think about the reason I had to make the change in the > moment. But I added this code to fix a bug. It is a necessary change. Bah! I searched all the logs and mailing list archives I could find and didn't see anything that would have explained the problem, like a related bug report around the time of the change. This is why you write comments in the code when there are nonobvious reasons for how it is! I still cannot imagine any reason why %esp would not be right for ptlongjmp.c's use (and any other).
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