Re: Addition of ppoll(2), a wrapper around pollts(2)

[Apurva Nandan <apurva.nandan4%gmail.com@localhost>]

I meant that I can't create a __weak_alias ppoll(2) to pollts(2) in libc as
pollts(2) has its definition in sys/sys. But yes the resulting weak alias
symbol works from everywhere.

On Mon, 25 May, 2020, 14:59 Martin Husemann, <martin%duskware.de@localhost> wrote:

> On Mon, May 25, 2020 at 11:24:14AM +0200, Joerg Sonnenberger wrote:
> > On Mon, May 25, 2020 at 10:06:22AM +0200, Martin Husemann wrote:
> > > On Mon, May 25, 2020 at 12:20:53PM +0530, Apurva Nandan wrote:
> > > > The problem with __weak_alias is that they only work inside the same
> C file
> > > > where the original symbol is defined, and don't work outside that
> file for
> > > > that symbol.
> > >
> > > That is not true.
> >
> > It is. ELF symbols are all attached an actual byte range. There is no
> > way to create an indirect symbol.
>
> We must be talking about different things here. The weak alias has to be
> defined in the same file as the syscall stub, but the resulting symbol
> would work from everywhere - right?
>
> Martin
>