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authorH.J. Lu <hjl.tools@gmail.com>2017-06-15 08:56:48 -0700
committerH.J. Lu <hjl.tools@gmail.com>2017-06-15 08:56:59 -0700
commit9ed0aa15d316fb30e056d3a2e8f3361460c67e78 (patch)
tree202758d5e45fbb9093bfbb3fbf442f25417f9da1 /sysdeps/m68k
parentb91a52d0d77d8c532d2cfa13be0db92faa397c4b (diff)
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x86-64: Implement strcat family IFUNC selectors in C
Implement strcat 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 strcat family functions within libc.

	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
	strcat-sse2.
	* sysdeps/x86_64/multiarch/strcat-sse2.S: New file.
	* sysdeps/x86_64/multiarch/strcat.c: Likewise.
	* sysdeps/x86_64/multiarch/strncat.c: Likewise.
	* sysdeps/x86_64/multiarch/strcat.S: Removed.
	* sysdeps/x86_64/multiarch/strncat.S: Likewise.
Diffstat (limited to 'sysdeps/m68k')
0 files changed, 0 insertions, 0 deletions