From: Alan Modra <amodra@gmail.com>
Date: Wed, 19 Nov 2014 22:22:46 +0000 (+1030)
Subject: Default powerpc64 to --plt-thread-safe for Go
X-Git-Tag: binutils-2_25~63
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=240f0ba1b9f06ce951dfcc9307d91c3c903496a4;p=thirdparty%2Fbinutils-gdb.git

Default powerpc64 to --plt-thread-safe for Go

Go is multi-threaded, so use thread-safe plt stubs.  __go_go doesn't
actually start threads, but is a convenient libgo function with a
reasonably unique name that is called by all Go executables.  (Threads
are started by a static function of libgo, runtime_newosproc, called
by a whole lot of global functions, including runtime_starttheworld
and runtime_main.)

bfd/
	* elf64-ppc.c (ppc64_elf_size_stubs): Add __go_go to thread_starters.
gold/
	* powerpc.cc (Target_powerpc::do_relax): Add __go_go to thread_starters.
---

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index f5ee80c421a..8ac4034d549 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,7 @@
+2014-11-20  Alan Modra  <amodra@gmail.com>
+
+	* elf64-ppc.c (ppc64_elf_size_stubs): Add __go_go to thread_starters.
+
 2014-11-18  Igor Zamyatin  <igor.zamyatin@intel.com>
 
 	* elf64-x86-64.c (elf_x86_64_check_relocs): Enable MPX PLT only
diff --git a/bfd/elf64-ppc.c b/bfd/elf64-ppc.c
index 0b65ab19cba..901a88d9232 100644
--- a/bfd/elf64-ppc.c
+++ b/bfd/elf64-ppc.c
@@ -11979,6 +11979,8 @@ ppc64_elf_size_stubs (struct bfd_link_info *info)
 	  "GOMP_parallel_loop_runtime_start",
 	  "GOMP_parallel_sections",
 	  "GOMP_parallel_sections_start",
+	  /* libgo */
+	  "__go_go",
 	};
       unsigned i;
 
diff --git a/gold/ChangeLog b/gold/ChangeLog
index 88dd58f5d1e..b3f7c36c775 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,7 @@
+2014-11-20  Alan Modra  <amodra@gmail.com>
+
+	* powerpc.cc (Target_powerpc::do_relax): Add __go_go to thread_starters.
+
 2014-10-28  Alan Modra  <amodra@gmail.com>
 
 	Apply trunk patches
diff --git a/gold/powerpc.cc b/gold/powerpc.cc
index 828bc1674c3..500be1fd0db 100644
--- a/gold/powerpc.cc
+++ b/gold/powerpc.cc
@@ -2720,6 +2720,8 @@ Target_powerpc<size, big_endian>::do_relax(int pass,
 	      "GOMP_parallel_loop_runtime_start",
 	      "GOMP_parallel_sections",
 	      "GOMP_parallel_sections_start",
+	      /* libgo */
+	      "__go_go",
 	    };
 
 	  if (parameters->options().shared())