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Add gcc-4.9 libgomp symbols requiring --plt-thread-safe for power7 

powerpc64 ld builds plt call stubs with a read barrier to provide
thread safety on lazy plt updates, necessary on multi-threaded apps
with power7 or later weakly ordered memory.  gcc-4.9 libgomp
introduced more functions that could call pthread_create, which means
we have more functions that if referenced in an executable should
cause a default of --plt-thread-safe.

	* elf64-ppc.c (ppc64_elf_size_stubs): Add gcc-4.9 libgomp functions
	to thread_starter.
This commit is contained in:
Alan Modra 2014-10-21 17:06:01 +10:30
parent 5c0ac14e47
commit 2300b5a141
2 changed files with 11 additions and 0 deletions
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5
bfd/ChangeLog
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@ -1,3 +1,8 @@
2014-10-21 Alan Modra <amodra@gmail.com>
* elf64-ppc.c (ppc64_elf_size_stubs): Add gcc-4.9 libgomp functions
to thread_starter.
2014-10-18 Alan Modra <amodra@gmail.com>
* elf64-ppc.c (ppc64_elf_add_symbol_hook): If function code

6
bfd/elf64-ppc.c
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@ -11964,11 +11964,17 @@ ppc64_elf_size_stubs (struct bfd_link_info *info)
/* libanl */
"getaddrinfo_a",
/* libgomp */
"GOMP_parallel",
"GOMP_parallel_start",
"GOMP_parallel_loop_static",
"GOMP_parallel_loop_static_start",
"GOMP_parallel_loop_dynamic",
"GOMP_parallel_loop_dynamic_start",
"GOMP_parallel_loop_guided",
"GOMP_parallel_loop_guided_start",
"GOMP_parallel_loop_runtime",
"GOMP_parallel_loop_runtime_start",
"GOMP_parallel_sections",
"GOMP_parallel_sections_start",
};
unsigned i;