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

• From: "H.J. Lu" <hjl dot tools at gmail dot com>
• To: Zack Weinberg <zackw at panix dot com>
• Cc: GNU C Library <libc-alpha at sourceware dot org>
• Date: Mon, 7 Aug 2017 06:21:45 -0700
• Subject: Re: [PATCH] i386: Add _startup_sbrk and _startup_fatal [BZ #21913]
• Authentication-results: sourceware.org; auth=none
• References: <20170806222606.GA13700@gmail.com> <CAKCAbMjbEmqWugQmChWGgM6O1w0VfaEHKj3GNLtAj1M++fAN5A@mail.gmail.com> <CAMe9rOrQ3UR_rkCyavQjC3S8YaMCeXTDxQEV7A-WArWYeJu0rw@mail.gmail.com> <CAKCAbMj6-siKzsa5bh0kn5FUetDHvYCfjSyb3hKZ6JO4mEbJFw@mail.gmail.com>

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.  Westill need it even if TLS initialization doesn't.-- H.J.

• References:
  • [PATCH] i386: Add _startup_sbrk and _startup_fatal [BZ #21913]
    • From: H.J. Lu
  • Re: [PATCH] i386: Add _startup_sbrk and _startup_fatal [BZ #21913]
    • From: Zack Weinberg
  • Re: [PATCH] i386: Add _startup_sbrk and _startup_fatal [BZ #21913]
    • From: H.J. Lu
  • Re: [PATCH] i386: Add _startup_sbrk and _startup_fatal [BZ #21913]
    • From: Zack Weinberg