On Thu, 2 Nov 2017, Linus Torvalds wrote:
> On Thu, Nov 2, 2017 at 11:40 AM, Thomas Gleixner <[email protected]> wrote:
> >
> > Hmm. Not sure. IIRC you need to be able to read it to figure out where the
> > entry points are. They are at fixed offsets, but there is some voodoo out
> > there which reads the 'elf' to get to them.
>
> That would actually be really painful.
>
> But I *think* you're confusing it with the vdso case, which really
> does do that whole "generate ELF information for debuggers and dynamic
> linkers" thing. The vsyscall page never did that afaik, and purely
> relied on fixed addresses.
Yes, managed to confuse myself. The vsycall page has only the fixed offset
entry points at least when its in emulation mode.
Thanks,
tglx
