about summary refs log tree commit diff
path: root/sysdeps/or1k/libc-tls.c
diff options
context:
space:
mode:
authorStafford Horne <shorne@gmail.com>2021-10-20 06:48:48 +0900
committerStafford Horne <shorne@gmail.com>2022-01-05 06:40:06 +0900
commit96882a00ceec91edd7e595bbd2c4d047774bf1e6 (patch)
treedd8bafe52bbdfe25819ef597996319c6eecb608f /sysdeps/or1k/libc-tls.c
parentde5c0edc804b6f2b09c05a0bde1e6679d57e4ca4 (diff)
downloadglibc-96882a00ceec91edd7e595bbd2c4d047774bf1e6.tar.gz
glibc-96882a00ceec91edd7e595bbd2c4d047774bf1e6.tar.xz
glibc-96882a00ceec91edd7e595bbd2c4d047774bf1e6.zip
or1k: Thread Local Storage support
OpenRISC includes 3 TLS addressing models.  Local Dynamic optimizations
are not done in the linker and therefore use the same code sequences as
Global Dynamic.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/or1k/libc-tls.c')
-rw-r--r--sysdeps/or1k/libc-tls.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/or1k/libc-tls.c b/sysdeps/or1k/libc-tls.c
new file mode 100644
index 0000000000..0e2e484fd4
--- /dev/null
+++ b/sysdeps/or1k/libc-tls.c
@@ -0,0 +1,34 @@
+/* Thread-local storage handling in the ELF dynamic linker.
+   OpenRISC version.
+   Copyright (C) 2022 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/>.  */
+
+#include <csu/libc-tls.c>
+#include <dl-tls.h>
+
+/* On OpenRISC, linker optimizations are not required, so __tls_get_addr
+   can be called even in statically linked binaries.  In this case module
+   must be always 1 and PT_TLS segment exist in the binary, otherwise it
+   would not link.  */
+
+void *
+__tls_get_addr (tls_index *ti)
+{
+  dtv_t *dtv = THREAD_DTV ();
+  return (char *) dtv[1].pointer.val + ti->ti_offset;
+}