From 352988a4a66723b9884ef92e0c2a2ae1165776d6 Mon Sep 17 00:00:00 2001 From: Carlos Eduardo Seo Date: Thu, 8 Oct 2015 14:26:23 -0300 Subject: 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. --- ChangeLog | 5 +++++ sysdeps/powerpc/libc-tls.c | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+) create mode 100644 sysdeps/powerpc/libc-tls.c diff --git a/ChangeLog b/ChangeLog index 321a8574f5..76f23fc16f 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2015-10-28 Carlos Eduardo Seo + + * sysdeps/powerpc/libc-tls.c: New file. Provides __tls_get_addr () in + static libc. + 2015-10-28 Joseph Myers * sysdeps/i386/configure.ac (libc_cv_cc_avx2): Remove configure 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 + . */ + +#include +#include + +/* 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; +} -- cgit 1.4.1