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From: "msc at linux dot ibm.com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug libc/27892] powerpc: scv ABI error handling fails to check
 IS_ERR_VALUE
Date: Mon, 24 May 2021 20:26:22 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27892

Matheus Castanho <msc at linux dot ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Matheus Castanho <msc at linux dot ibm.com> ---
Issue fixed on master for glibc 2.34:

commit 7de36744ee1325f35d3fe0ca079dd33c40b12267=20
Author: Nicholas Piggin <npiggin@gmail.com>
Date:   Thu May 20 11:00:36 2021 -0300

    powerpc: Fix handling of scv return error codes [BZ #27892]

    When using scv for templated ASM syscalls, current code interprets any
    negative return value as error, but the only valid error codes are in
    the range -4095..-1 according to the ABI.

    This commit also fixes 'signal.gen.test' strace test, where the issue
    was first identified.

    Reviewed-by: Matheus Castanho <msc@linux.ibm.com>


This patch was also backported to 2.33 by commit
0ef0e6de7fdfa18328b09ba2afb4f0112d4bdab4.

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