David Woodhouse writes:
> On Thu, 2007-08-16 at 05:39 -0400, Alan Cox wrote:
> > Sorry ignore the previous email I misunderstood what was going on.
> >
> > You can open a file O_CREAT with neither read or write, you can open a file
> > with O_CREAT|O_WRONLY but not give permissions in the file mode. You must
> > provide the third argument so the abort is right. If you don't then the permissions
> > are set based on the random values (eg the return address)
>
> Return address?
>
> Even on crappy register-starved architectures like i386 we'd have the
> three arguments in registers, wouldn't we?
No: in userland all args are passed on the stack.
subl $24, %esp #,
movl $66, 4(%esp) #,
movl $.LC0, (%esp) #,
call open #
Andrew.
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