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glibc/sysdeps/arm/armv7/multiarch/rtld-memcpy.S

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arm: Implement memcpy ifunc selection in C This patch refactor ARM memcpy ifunc selector to a C implementation. No functional change is expected, including ifunc resolution rules. It also adds some cleanup: - Internal memcpy hidden definition (__GI_memcpy) is now a hidden symbol. - No need to create hidden definition for the ifunc variants. Checked on armv7-linux-gnueabihf and with a build for arm-linux-gnueabi, arm-linux-gnueabihf with and without multiarch support and with both GCC 7.1 and GCC mainline. I also checked with the some possible multiarch different configurations that trigger different memcpy buids (__ARM_NEON__ && !__SOFT_FP__, !__ARM_NEON__ && !__SOFT_FP__, and !__ARM_NEON__ && __SOFT_FP__). * sysdeps/arm/arm-ifunc.h: New file. * sysdeps/arm/armv7/multiarch/ifunc-memcpy.h: Likewise. * sysdeps/arm/armv7/multiarch/memcpy.c: Likewise. * sysdeps/arm/armv7/multiarch/memcpy_arm.S: Likewise. * sysdeps/arm/armv7/multiarch/rtld-memcpy.S: Likewise. * sysdeps/arm/armv7/multiarch/memcpy_neon.S [!__ARM_NEON__] (__memcpy_neon): Avoid create hidden alias. * sysdeps/arm/armv7/multiarch/memcpy_vfp.S [!__ARM_NEON_] (__memcpy_vfp): Likewise. * sysdeps/arm/armv7/multiarch/Makefile [$(subdir) = string] (sysdep_routines): Add memcpy_arm. * sysdeps/arm/armv7/multiarch/memcpy.S: Remove file. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2017-10-04 17:44:08 -03:00
#include <sysdeps/arm/armv7/multiarch/memcpy_impl.S>
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