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authorCarlos Eduardo Seo <cseo@linux.vnet.ibm.com>2015-10-08 14:26:23 -0300
committerTulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>2015-10-28 11:42:23 -0200
commit352988a4a66723b9884ef92e0c2a2ae1165776d6 (patch)
tree0335898a6d4b5c607c09b14aed9949547c3f9cfb /sysdeps/powerpc
parentc871b9b096e107fe6220e18102f5fb8070b49819 (diff)
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powerpc: Provide __tls_get_addr () in static libc
Since '--no-tls-optimize' is available for Power in ld, we need to provide
__tls_get_addr () in static libc in order to avoid undefined references to this
symbol when that flag is used.

	* sysdeps/powerpc/libc-tls.c: New file. Provides __tls_get_addr () in
	static libc.
Diffstat (limited to 'sysdeps/powerpc')
-rw-r--r--sysdeps/powerpc/libc-tls.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/sysdeps/powerpc/libc-tls.c b/sysdeps/powerpc/libc-tls.c
new file mode 100644
index 0000000000..ee61ecc3eb
--- /dev/null
+++ b/sysdeps/powerpc/libc-tls.c
@@ -0,0 +1,32 @@
+/* Thread-local storage handling in the ELF dynamic linker.  PowerPC version.
+   Copyright (C) 2015 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <csu/libc-tls.c>
+#include <dl-tls.h>
+
+/* On powerpc, the linker usually optimizes code sequences used to access
+   Thread Local Storage.  However, when the user disables these optimizations
+   by passing --no-tls-optimze to the linker, we need to provide __tls_get_addr
+   in static libc in order to avoid undefined references to that symbol.  */
+
+void *
+__tls_get_addr (tls_index *ti)
+{
+  dtv_t *dtv = THREAD_DTV ();
+  return (char *) dtv[1].pointer.val + ti->ti_offset + TLS_DTV_OFFSET;
+}