Re: __libc_stack_end is broken?

[Samuel Thibault]

Hi,

Michael Casadevall, le Tue 28 Aug 2007 20:43:02 -0400, a écrit :
> While fixing Ruby on Hurd, I discovered  __libc_stack_end is (seemingly)
> broken. It seems on Linux, this points to the end the stack for the
> process, but on Hurd this is broken (it points at an invalid location
> outside of a processes address space). 

That's odd: the code that sets it is shared between Linux & the Hurd:
sysdeps/i386/elf/start.S that pushes %esp.

> A quick gogle says though that this symbol shouldn't even be exported,
> so I'm not sure what the proper behavior in this regard is.

The Hurd still exports it because sysdeps/mach/hurd/dl-sysdep.c define
it externally, while the generic elf/dl-sysdep.c correctly sets it
hidden.

> Any comments would be appericated because it will also influence how
> the ruby patch is done.

Both issues should get fixed :)

Samuel