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[PATCH] Don't add hidden symbols into static binaries
- From: Siddhesh Poyarekar <siddhesh at sourceware dot org>
- To: libc-alpha at sourceware dot org
- Date: Fri, 11 Aug 2017 12:39:52 +0530
- Subject: [PATCH] Don't add hidden symbols into static binaries
- Authentication-results: sourceware.org; auth=none
The __GI_* symbol aliases for __memcpy_generic are unnecessary since
they're never used. Add them only for libc.so to avoid PLT. Maybe
some time in future we need to evaluate the relative cost of PLT vs
gains from multiarch memcpy implementations and take a call on whether
to drop this completely.
* sysdeps/aarch64/multiarch/memcpy_generic.S (__GI_memcpy):
Define only for libc.so.
---
sysdeps/aarch64/multiarch/memcpy_generic.S | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sysdeps/aarch64/multiarch/memcpy_generic.S b/sysdeps/aarch64/multiarch/memcpy_generic.S
index 041a779..edb2e52 100644
--- a/sysdeps/aarch64/multiarch/memcpy_generic.S
+++ b/sysdeps/aarch64/multiarch/memcpy_generic.S
@@ -33,9 +33,11 @@
# undef libc_hidden_builtin_def
# define libc_hidden_builtin_def(name)
+# ifdef SHARED
/* It doesn't make sense to send libc-internal memcpy calls through a PLT. */
.globl __GI_memcpy; __GI_memcpy = __memcpy_generic
.globl __GI_memmove; __GI_memmove = __memmove_generic
+# endif
#endif
--
2.7.4