Messages in this thread | | | Date | Tue, 29 Aug 2006 14:55:53 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: Why set ORIG_EAX(%esp) to -1 in arch/i386/kernel/entry.S:error_code? |
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On Tue, 29 Aug 2006, Jeremy Fitzhardinge wrote: > > There doesn't seem much point; nothing seems to use it on the trap-handling > paths. Is it a historical left-over?
No. It's important that ORIG_EAX be set to some value that is _not_ a valid system call number, so that the system call restart logic (see the signal handling code) doesn't trigger.
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