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Re: [PATCH][BZ #19490] Add unwind descriptors for x86_64 _mcount and __fentry__
- From: Paul Pluzhnikov <ppluzhnikov at google dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: Andreas Schwab <schwab at suse dot de>, GLIBC Devel <libc-alpha at sourceware dot org>, Andi Kleen <andi at firstfloor dot org>
- Date: Thu, 3 Mar 2016 09:35:07 -0800
- Subject: Re: [PATCH][BZ #19490] Add unwind descriptors for x86_64 _mcount and __fentry__
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On Thu, Mar 3, 2016 at 9:30 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> Why do we need __fentry__ different from _mcount in glibc? Can we
> make __fentry__ an alias of _mcount?
For one thing, they have different stack alignment requirements, as I
already said on this thread:
https://sourceware.org/ml/libc-alpha/2016-02/msg00823.html
--
Paul Pluzhnikov