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3 Commits

Author SHA1 Message Date
Joseph Myers
688903eb3e Update copyright dates with scripts/update-copyrights. 
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
 2018-01-01 00:32:25 +00:00
H.J. Lu
fc11ff8d0a x86-64: Use IFUNC memcpy and mempcpy in libc.a 
Since apply_irel is called before memcpy and mempcpy are called, we
can use IFUNC memcpy and mempcpy in libc.a.

	* sysdeps/x86_64/memmove.S (MEMCPY_SYMBOL): Don't check SHARED.
	(MEMPCPY_SYMBOL): Likewise.
	* sysdeps/x86_64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Test memcpy and mempcpy in libc.a.
	* sysdeps/x86_64/multiarch/memcpy-ssse3-back.S: Also include
	in libc.a.
	* sysdeps/x86_64/multiarch/memcpy-ssse3.S: Likewise.
	* sysdeps/x86_64/multiarch/memmove-avx512-no-vzeroupper.S:
	Likewise.
	* sysdeps/x86_64/multiarch/memcpy.c: Also include in libc.a.
	(__hidden_ver1): Don't use in libc.a.
	* sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S
	(__mempcpy): Don't create a weak alias in libc.a.
	* sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S: Support
	libc.a.
	* sysdeps/x86_64/multiarch/mempcpy.c: Also include in libc.a.
	(__hidden_ver1): Don't use in libc.a.
 2017-08-04 12:27:18 -07:00
H.J. Lu
5c3e322d3b x86-64: Implement memmove family IFUNC selectors in C 
Implement memmove 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 memmove family functions within libc.

	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
	memmove-sse2-unaligned-erms, memcpy_chk-nonshared,
	mempcpy_chk-nonshared and memmove_chk-nonshared.
	* sysdeps/x86_64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Add tests for __memmove_chk_erms,
	__memcpy_chk_erms and __mempcpy_chk_erms.  Update comments.
	* sysdeps/x86_64/multiarch/ifunc-memmove.h: New file.
	* sysdeps/x86_64/multiarch/memcpy.c: Likewise.
	* sysdeps/x86_64/multiarch/memcpy_chk-nonshared.S: Likewise.
	* sysdeps/x86_64/multiarch/memcpy_chk.c: Likewise.
	* sysdeps/x86_64/multiarch/memmove-sse2-unaligned-erms.S: Likewise.
	* sysdeps/x86_64/multiarch/memmove.c: Likewise.
	* sysdeps/x86_64/multiarch/memmove_chk-nonshared.S: Likewise.
	* sysdeps/x86_64/multiarch/memmove_chk.c: Likewise.
	* sysdeps/x86_64/multiarch/mempcpy.c: Likewise.
	* sysdeps/x86_64/multiarch/mempcpy_chk-nonshared.S: Likewise.
	* sysdeps/x86_64/multiarch/mempcpy_chk.c: Likewise.
	* sysdeps/x86_64/multiarch/memcpy.S: Removed.
	* sysdeps/x86_64/multiarch/memcpy_chk.S: Likewise.
	* sysdeps/x86_64/multiarch/memmove.S: Likewise.
	* sysdeps/x86_64/multiarch/memmove_chk.S: Likewise.
	* sysdeps/x86_64/multiarch/mempcpy.S: Likewise.
	* sysdeps/x86_64/multiarch/mempcpy_chk.S: Likewise.
	* sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S
	(__mempcpy_chk_erms): New function.
	(__memmove_chk_erms): Likewise.
	(__memcpy_chk_erms): New alias.
 2017-06-14 12:11:10 -07:00