On Thu, 7 Jun 2007, Linus Torvalds wrote:
> On Thu, 7 Jun 2007, Eric Dumazet wrote:
> >
> > This is a nice idea, but 32/64 compat code is going to hate it :)
>
> It should be fairly simple for 32/64-bit compat code too.
>
> The compat code should just call the compat system call
>
> > syscall_indirect() would be writen in assembly for each arch, since there is
> > no generic syscall table. Thats really a lot of work, especially if we want
> > to
> > mess with signal mask, umask ...
>
> No no no. That would be horribly idiotic.
>
> The thing should be 99% generic code, ie we would have
>
> syscall_indirect(..)
> {
> long retval;
>
> .. set up signals/flags ..
> retval = arch_syscall_indirect(syscall, args);
> .. unsetup signals/flags ..
> return retval;
> }
>
> compat_syscall_indirect(..)
> {
> int retval;
>
> .. set up signals/flags ..
> retval = compat_arch_syscall_indirect(syscall, args);
> .. unsetup signals/flags ..
> return retval;
> }
>
> and the *only* thing that each architecture would need to do is that
> (trivial) arch_syscall_indirect() thing (and the compat version, if
> applicable). And those literally should be generally pretty damn trivial.
Ok, I like this better honestly. I really did not want to win the Oscar
for the 2007 Syscall Spammer of the year :)
- Davide
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