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powerpc: Provide __tls_get_addr () in static libc

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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.
This commit is contained in:
Carlos Eduardo Seo 2015-10-08 14:26:23 -03:00 committed by Tulio Magno Quites Machado Filho
parent c871b9b096
commit 352988a4a6
2 changed files with 37 additions and 0 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2015-10-28 Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
* sysdeps/powerpc/libc-tls.c: New file. Provides __tls_get_addr () in
static libc.
2015-10-28 Joseph Myers <joseph@codesourcery.com>
* sysdeps/i386/configure.ac (libc_cv_cc_avx2): Remove configure

32
sysdeps/powerpc/libc-tls.c Normal file
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/* 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;
}