[Bug libc/24986] alpha: new getegid, geteuid and getppid syscalls used unconditionally

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=24986

--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The release/2.29/master branch has been updated by Aurelien Jarno
<aurel32@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a132a2c305f91e4f85de00566f308eae8d95d8bf

commit a132a2c305f91e4f85de00566f308eae8d95d8bf
Author: Aurelien Jarno <aurelien@aurel32.net>
Date:   Sat Sep 14 18:22:52 2019 +0200

    alpha: force old OSF1 syscalls for getegid, geteuid and getppid [BZ #24986]

    On alpha, Linux kernel 5.1 added the standard getegid, geteuid and
    getppid syscalls (commit ecf7e0a4ad15287). Up to now alpha was using
    the corresponding OSF1 syscalls through:
     - sysdeps/unix/alpha/getegid.S
     - sysdeps/unix/alpha/geteuid.S
     - sysdeps/unix/alpha/getppid.S

    When building against kernel headers >= 5.1, the glibc now use the new
    syscalls through sysdeps/unix/sysv/linux/syscalls.list. When it is then
    used with an older kernel, the corresponding 3 functions fail.

    A quick fix is to move the OSF1 wrappers under the
    sysdeps/unix/sysv/linux/alpha directory so they override the standard
    linux ones. A better fix would be to try the new syscalls and fallback
    to the old OSF1 in case the new ones fail. This can be implemented in
    a later commit.

    Changelog:
        [BZ #24986]
            * sysdeps/unix/alpha/getegid.S: Move to ...
        * sysdeps/unix/sysv/linux/alpha/getegid.S: ... here.
            * sysdeps/unix/alpha/geteuid.S: Move to ...
        * sysdeps/unix/sysv/linux/alpha/geteuid.S: ... here.
            * sysdeps/unix/alpha/getppid.S: Move to ...
        * sysdeps/unix/sysv/linux/alpha/getppid.S: ... here

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