From f82e9672ad89ea1ef40bbe1af71478e255e87c5e Mon Sep 17 00:00:00 2001 From: Siddhesh Poyarekar Date: Tue, 25 Apr 2017 22:39:17 +0530 Subject: aarch64: Allow overriding HWCAP_CPUID feature check using HWCAP_MASK Now that LD_HWCAP_MASK (or glibc.tune.hwcap_mask) is read early enough to influence cpu feature check in aarch64, use it to influence multiarch selection. Setting LD_HWCAP_MASK such that it clears HWCAP_CPUID will now disable multiarch for the binary. HWCAP_CPUID is also now set in HWCAP_IMPORTANT so that it is set by default. With this patch, this feature is only usable with dyanmically linked binaries because LD_HWCAP_MASK is not read for static binaries. A future patch fixes that. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (init_cpu_features): Use glibc.tune.hwcap_mask. * sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h: New file. --- ChangeLog | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'ChangeLog') diff --git a/ChangeLog b/ChangeLog index 5b4d842100..f0b25e31cc 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,9 @@ 2017-06-07 Siddhesh Poyarekar + * sysdeps/unix/sysv/linux/aarch64/cpu-features.c + (init_cpu_features): Use glibc.tune.hwcap_mask. + * sysdeps/unix/sysv/linux/aarch64/dl-procinfo.h: New file. + * elf/dl-hwcaps.h: New file. * elf/dl-hwcaps.c: Include it. (_dl_important_hwcaps)[HAVE_TUNABLES]: Read and update -- cgit 1.4.1