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Re: libatomic IFUNC question (arm & libat_have_strexbhd)

From: Jim Wilson <jim dot wilson at linaro dot org>
To: sellcey at cavium dot com, Florian Weimer <fw at deneb dot enyo dot de>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 7 Jun 2017 12:07:22 -0700
Subject: Re: libatomic IFUNC question (arm & libat_have_strexbhd)
Authentication-results: sourceware.org; auth=none
References: <201706052232.v55MW7Jj022346@sellcey-dt.caveonetworks.com> <87a85lmzqt.fsf@mid.deneb.enyo.de> <1496764913.13346.6.camel@cavium.com>

On 06/06/2017 09:01 AM, Steve Ellcey wrote:

So the question remains, where is libat_have_strexbhd set?  As near as
I can tell it isn't set, which would make the libatomic IFUNC pointless
on arm.

libat_have_strexbhd isn't set anywhere. It looks like this was aprototype that was never fully fleshed out. See for instance thelibatomic/config/x86/init.c file. Finishing this means someone has tofigure out how to use the arm cpuid equivalent to set the two variablesappropriately.

Jim

References:
- libatomic IFUNC question (arm & libat_have_strexbhd)
  - From: Steve Ellcey
- Re: libatomic IFUNC question (arm & libat_have_strexbhd)
  - From: Florian Weimer
- Re: libatomic IFUNC question (arm & libat_have_strexbhd)
  - From: Steve Ellcey

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