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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-06-01 22:32:03 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-06-07 11:11:38 +0530 |
| commit | ff08fc59e36e02074eba8ab39b0d9001363970f0 (patch) | |
| tree | 1926c0dd4897a00b7541deb214bf6a1a480a8f8d /sysdeps/x86/cpu-features.c | |
| parent | 6482e63403a3d13bf42f5029407b6151ad9f4ca5 (diff) | |
| download | glibc-ff08fc59e36e02074eba8ab39b0d9001363970f0.tar.gz | |
tunables: Use glibc.tune.hwcap_mask tunable instead of _dl_hwcap_mask
Drop _dl_hwcap_mask when building with tunables. This completes the
transition of hwcap_mask reading from _dl_hwcap_mask to tunables.
* elf/dl-hwcaps.h: New file.
* elf/dl-hwcaps.c: Include it.
(_dl_important_hwcaps)[HAVE_TUNABLES]: Read and update
glibc.tune.hwcap_mask.
* elf/dl-cache.c: Include dl-hwcaps.h.
(_dl_load_cache_lookup)[HAVE_TUNABLES]: Read
glibc.tune.hwcap_mask.
* sysdeps/sparc/sparc32/dl-machine.h: Likewise.
* elf/dl-support.c (_dl_hwcap2)[HAVE_TUNABLES]: Drop
_dl_hwcap_mask.
* elf/rtld.c (rtld_global_ro)[HAVE_TUNABLES]: Drop
_dl_hwcap_mask.
(process_envvars)[HAVE_TUNABLES]: Likewise.
* sysdeps/generic/ldsodefs.h (rtld_global_ro)[HAVE_TUNABLES]:
Likewise.
* sysdeps/x86/cpu-features.c (init_cpu_features): Don't
initialize dl_hwcap_mask when tunables are enabled.
Diffstat (limited to 'sysdeps/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index b481f50e75..4fe58bfd51 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -316,7 +316,11 @@ no_cpuid: /* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86. */ GLRO(dl_platform) = NULL; GLRO(dl_hwcap) = 0; +#if !HAVE_TUNABLES + /* The glibc.tune.hwcap_mask tunable is initialized already, so no need to do + this. */ GLRO(dl_hwcap_mask) = HWCAP_IMPORTANT; +#endif # ifdef __x86_64__ if (cpu_features->kind == arch_kind_intel) |