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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-12-04 21:17:17 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-12-04 21:17:17 +0530 |
| commit | 4c1d801a5956f049126ef6cbe22ed23693e77a8c (patch) | |
| tree | a5e2a28dc0fe334834f18708aa7f02a554fc5c76 | |
| parent | 478593e6374f3818da39332260dc453cb19cfa1e (diff) | |
| download | glibc-4c1d801a5956f049126ef6cbe22ed23693e77a8c.tar glibc-4c1d801a5956f049126ef6cbe22ed23693e77a8c.tar.gz glibc-4c1d801a5956f049126ef6cbe22ed23693e77a8c.tar.bz2 glibc-4c1d801a5956f049126ef6cbe22ed23693e77a8c.zip | |
aarch64: Avoid hidden symbols for memcpy/memmove into static binaries
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.
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/aarch64/multiarch/memcpy_generic.S | 2 |
2 files changed, 7 insertions, 0 deletions
@@ -1,3 +1,8 @@ +2017-12-04 Siddhesh Poyarekar <siddhesh@sourceware.org> + + * sysdeps/aarch64/multiarch/memcpy_generic.S (__GI_memcpy): + Define only for libc.so. + 2017-12-04 Stefan Liebler <stli@linux.vnet.ibm.com> * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h diff --git a/sysdeps/aarch64/multiarch/memcpy_generic.S b/sysdeps/aarch64/multiarch/memcpy_generic.S index 041a77943d..edb2e52626 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 |