# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/glibc/hotfix-enlarge-legacy-tls.patch.ia64
# Copyright (C) 2026 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0 or patched project license
# --- T2-COPYRIGHT-END ---

diff --git a/elf/dl-tls.c b/elf/dl-tls.c
index 724691f54e..a222aca2c6 100644
--- a/elf/dl-tls.c
+++ b/elf/dl-tls.c
@@ -122,9 +122,12 @@ tls_static_surplus (int nns, int opt_tls)
 
 /* This value is chosen so that with default values for the tunables,
    the computation of dl_tls_static_surplus in
-   _dl_tls_static_surplus_init yields the historic value 1664, for
-   backwards compatibility.  */
-#define LEGACY_TLS (1664 - tls_static_surplus (DEFAULT_NNS, OPTIONAL_TLS))
+   _dl_tls_static_surplus_init yields at least 16384 bytes.  The
+   historic value was 1664, but modern libraries such as Mesa's
+   libEGL_mesa.so.0 (0x1130 bytes) and libgallium.so (0x1120 bytes)
+   use large initial-exec TLS blocks and require significantly more
+   surplus to be dlopen'd without error.  */
+#define LEGACY_TLS (16384 - tls_static_surplus (DEFAULT_NNS, OPTIONAL_TLS))
 
 /* Calculate the size of the static TLS surplus, when the given
    number of audit modules are loaded.  Must be called after the