[glibc/nsz/bug19329] aarch64: free tlsdesc data on dlclose [BZ #27403]

[Szabolcs Nagy <nsz@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=90458da8b7b46e806f756c2715c87fc9d2c1be95

commit 90458da8b7b46e806f756c2715c87fc9d2c1be95
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Thu Feb 11 13:38:10 2021 +0000

    aarch64: free tlsdesc data on dlclose [BZ #27403]
    
    DL_UNMAP_IS_SPECIAL and DL_UNMAP were not defined. The definitions are
    now copied from arm, since the same is needed on aarch64. The cleanup
    of tlsdesc data is handled by the custom _dl_unmap.
    
    Fixes bug 27403.

Diff:
---
 sysdeps/aarch64/dl-lookupcfg.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/sysdeps/aarch64/dl-lookupcfg.h b/sysdeps/aarch64/dl-lookupcfg.h
new file mode 100644
index 0000000000..c1ae676ae1
--- /dev/null
+++ b/sysdeps/aarch64/dl-lookupcfg.h
@@ -0,0 +1,27 @@
+/* Configuration of lookup functions.
+   Copyright (C) 2006-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#define DL_UNMAP_IS_SPECIAL
+
+#include_next <dl-lookupcfg.h>
+
+struct link_map;
+
+extern void _dl_unmap (struct link_map *map);
+
+#define DL_UNMAP(map) _dl_unmap (map)