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PING^2: [PATCH 0/2] nptl: Update struct pthread_unwind_buf
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Florian Weimer <fweimer at redhat dot com>
- Cc: "Carlos O'Donell" <carlos at redhat dot com>, GNU C Library <libc-alpha at sourceware dot org>
- Date: Wed, 21 Feb 2018 07:33:37 -0800
- Subject: PING^2: [PATCH 0/2] nptl: Update struct pthread_unwind_buf
- Authentication-results: sourceware.org; auth=none
On Thu, Feb 15, 2018 at 12:02 PM, H.J. Lu <firstname.lastname@example.org> wrote:
> On Fri, Feb 9, 2018 at 7:24 AM, H.J. Lu <email@example.com> wrote:
>> On Fri, Feb 9, 2018 at 6:33 AM, Florian Weimer <firstname.lastname@example.org> wrote:
>>> On 02/09/2018 03:13 PM, H.J. Lu wrote:
>>>> I built glibc master with gcc-8.0.1 -mcet -fcf-protection. Some object
>>>> files do get CET marker as expected. But static executable isn't:
>>> I said static libraries. If I compile this code (based on the example from
>>> the manual page) on Fedora rawhide:
>> Glibc never provides binary compatibility with static libraries. My suggestions
>> 1. Recompile static libraries after CET is enabled in glibc. Or
>> 2. Don't compile static libraries with CET.
>> BTW, we don't have space to save shadow stack register with existing
>> cancel buf.