[PING][PATCH] aarch64: Avoid hidden symbols for memcpy/memmove into static binaries

Szabolcs Nagy szabolcs.nagy@arm.com
Mon Dec 4 13:12:00 GMT 2017


On 04/12/17 12:44, Siddhesh Poyarekar wrote:
> Ping?
> 
> On Thursday 30 November 2017 04:56 PM, Siddhesh Poyarekar wrote:
>> The __GI_* symbol aliases for __memcpy_generic are unnecessary since
>> they're never used.  Add them only for libc.so to avoid PLT.
...
>> +# 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
>>  

OK to commit.


i was thinking that some existing macro from
libc-symbols.h would be better, since those already
deal with the #ifdef SHARED (and other cases)

i think

hidden_ver (__memcpy_generic, memcpy)

happens to do the right thing, but it's probably
an abuse of that macro.. and it seems we already
do similar things in other asm files (which means
the libc-symbols.h macros are not that useful..).



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