AuroraMiddleware/glibc
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2 Commits

Author SHA1 Message Date
Adhemerval Zanella
65687ac76c Remove remaining _HAVE_STRING_ARCH_* definitions (BZ #18858) 
Since the removal of bits/string.h, _HAVE_STRING_ARCH_* are no
longer used.  This patch removes the unused macros from i686
and x86_64 sysdeps folder.

Checked on x86_64-linux-gnu and i686-linux-gnu.

	* sysdeps/i386/i686/multiarch/strncpy.c (_HAVE_STRING_ARCH_strncpy):
	Remove define.
	* sysdeps/x86_64/multiarch/stpcpy.c (_HAVE_STRING_ARCH_stpcpy):
	Likewise.
	* sysdeps/x86_64/multiarch/strcspn.c (_HAVE_STRING_ARCH_strcspn):
	Likewise.
	* sysdeps/x86_64/multiarch/strncat.c (_HAVE_STRING_ARCH_strncat):
	Likewise.
	* sysdeps/x86_64/multiarch/strncpy.c (_HAVE_STRING_ARCH_strncpy):
	Likewise.
	* sysdeps/x86_64/multiarch/strpbrk.c (_HAVE_STRING_ARCH_strpbrk):
	Likewise.
	* sysdeps/x86_64/multiarch/strspn.c (_HAVE_STRING_ARCH_strspn):
	Likewise.
 2017-09-06 14:35:23 -03:00
H.J. Lu
5a103908c0 x86-64: Implement strcpy family IFUNC selectors in C 
Implement strcpy family IFUNC selectors in C.

All internal calls within libc.so can use IFUNC on x86-64 since unlike
x86, x86-64 supports PC-relative addressing to access the GOT entry so
that it can call via PLT without using an extra register.  For libc.a,
we can't use IFUNC for functions which are called before IFUNC has been
initialized.  Use IFUNC internally reduces the icache footprint since
libc.so and other codes in the process use the same implementations.
This patch uses IFUNC for strcpy family functions within libc.

	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
	strcpy-sse2 and stpcpy-sse2.
	* sysdeps/x86_64/multiarch/ifunc-unaligned-ssse3.h: New file.
	* sysdeps/x86_64/multiarch/stpcpy-sse2.S: Likewise.
	* sysdeps/x86_64/multiarch/stpcpy.c: Likewise.
	* sysdeps/x86_64/multiarch/stpncpy.c: Likewise.
	* sysdeps/x86_64/multiarch/strcpy-sse2.S: Likewise.
	* sysdeps/x86_64/multiarch/strcpy.c: Likewise.
	* sysdeps/x86_64/multiarch/strncpy.c: Likewise.
	* sysdeps/x86_64/multiarch/stpcpy.S: Removed.
	* sysdeps/x86_64/multiarch/stpncpy.S: Likewise.
	* sysdeps/x86_64/multiarch/strcpy.S: Likewise.
	* sysdeps/x86_64/multiarch/strncpy.S: Likewise.
	* sysdeps/x86_64/multiarch/stpncpy-c.c (weak_alias): New.
	(libc_hidden_def): Always defined as empty.
	* sysdeps/x86_64/multiarch/strncpy-c.c (libc_hidden_builtin_def):
	Always Defined as empty.
 2017-06-12 09:06:09 -07:00