Re: [PATCH -mm v2 2/2] coredump: add a new elf note with siginfo of the signal

[Oleg Nesterov <oleg@redhat.com>]

On 09/18, Roland McGrath wrote:
>
> > But, somehow I forgot about compat tasks when we discussed this before.
> > Perhaps the code above should do
> >
> > 	if (is_compat_task())
> > 		copy_siginfo_to_user32(...);
> > 	else
> > 		copy_siginfo_to_user(...);
> >
> > ?
>
> compat_binfmt_elf.c will define a separate copy of this code via #include.
> So it just needs #define copy_siginfo_to_user copy_siginfo_to_user32 or
> something like that, as the various other types and functions are handled.

Ah, yes, you are right. Much better.

But. It seems, it also needs to do s/siginfo_t/compat_siginfo/ somehow,
a simple '#define' obviously can't work.

IOW, elf_thread_core_info.signote should be either siginfo_t or
compat_siginfo, but the argument passed to ->core_dump() and callees
should be siginfo_t.

Oleg.