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7165583255
glibc/sysdeps/s390/multiarch
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Stefan Liebler 7165583255 S390: Do not call memcpy, memcmp, memset within libc.so via ifunc-plt. 
On s390, the memcpy, memcmp, memset functions are IFUNC symbols,
which are created with s390_libc_ifunc-macro.
This macro creates a __GI_ symbol which is set to the
ifunced symbol. Thus calls within libc.so to e.g. memcpy
result in a call to *ABS*+0x954c0@plt stub and afterwards
to the resolved memcpy-ifunc-variant.

This patch sets the __GI_ symbol to the default-ifunc-variant
to avoid the plt call. The __GI_ symbols are now created at the
default variant of ifunced function.

ChangeLog:

	* sysdeps/s390/multiarch/ifunc-resolve.h (s390_libc_ifunc):
	Remove __GI_ symbol.
	* sysdeps/s390/s390-32/multiarch/memcmp-s390.S: Add __GI_memcmp symbol.
	* sysdeps/s390/s390-64/multiarch/memcmp-s390x.S: Likewise.
	* sysdeps/s390/s390-32/multiarch/memcpy-s390.S: Add __GI_memcpy symbol.
	* sysdeps/s390/s390-64/multiarch/memcpy-s390x.S: Likewise.
	* sysdeps/s390/s390-32/multiarch/memset-s390.S: Add __GI_memset symbol.
	* sysdeps/s390/s390-64/multiarch/memset-s390x.S: Likewise.
2016-05-24 10:39:13 +02:00
..
ifunc-impl-list.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ifunc-resolve.h S390: Do not call memcpy, memcmp, memset within libc.so via ifunc-plt. 2016-05-24 10:39:13 +02:00
Makefile S390: Optimize memrchr. 2015-08-26 10:26:26 +02:00
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