elf: Introduce generic <dl-tls.h>

On arc, the definition of TLS_DTV_UNALLOCATED now comes from
<dl-dtv.h>.

For x86-64 x32, a separate version is needed because unsigned long int
is 32 bits on this target.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 36 insertions, 2 deletions

diff --git a/sysdeps/generic/dl-tls.h b/sysdeps/generic/dl-tls.h
index 7703a97..8aff4b6 100644
--- a/sysdeps/generic/dl-tls.h
+++ b/sysdeps/generic/dl-tls.h
@@ -1,2 +1,36 @@
-/* There has to be an architecture specific version of this file.  */
-#error "architecture-specific version of <dl-tls.h> missing"
+/* TLS definitions for the ELF dynamic linker.  Generic version.
+   Copyright (C) 2002-2025 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/>.  */
+
+#ifndef _DL_TLS_H
+#define _DL_TLS_H
+
+/* Type used for the representation of TLS information in the GOT.  */
+typedef struct
+{
+  unsigned long int ti_module;
+  unsigned long int ti_offset;
+} tls_index;
+
+extern void *__tls_get_addr (tls_index *ti);
+
+/* Dynamic thread vector pointers point to the start of each
+   TLS block.  */
+#define TLS_DTV_OFFSET 0
+
+#endif /* _DL_TLS_H */