[PATCH] i386: Add _startup_sbrk and _startup_fatal [BZ #21913]

[H.J. Lu]

On Mon, Aug 7, 2017 at 6:11 AM, Zack Weinberg <zackw@panix.com> wrote:
> On Mon, Aug 7, 2017 at 8:38 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
>> On Mon, Aug 7, 2017 at 4:47 AM, Zack Weinberg <zackw@panix.com> wrote:
>>
>> To initialize TLS, we need a single syscall, sbrk.
>
> I presume this is to allocate memory for the TLS block.  But why can't
> the TLS block - remember, this is for the main thread, in a statically
> linked binary - be statically allocated data?
>

I can look into it.

But tunables_strdup also calls sbrk before TLS is initialized.  We
still need it even if TLS initialization doesn't.

-- 
H.J.