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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 /elf/dl-support.c | |
| parent | 6482e63403a3d13bf42f5029407b6151ad9f4ca5 (diff) | |
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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 'elf/dl-support.c')
| -rw-r--r-- | elf/dl-support.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/elf/dl-support.c b/elf/dl-support.c index 3c46a7a481..c22be854f4 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -164,6 +164,7 @@ uint64_t _dl_hwcap2 __attribute__ ((nocommon)); /* The value of the FPU control word the kernel will preset in hardware. */ fpu_control_t _dl_fpu_control = _FPU_DEFAULT; +#if !HAVE_TUNABLES /* This is not initialized to HWCAP_IMPORTANT, matching the definition of _dl_important_hwcaps, below, where no hwcap strings are ever used. This mask is still used to mediate the lookups in the cache @@ -171,6 +172,7 @@ fpu_control_t _dl_fpu_control = _FPU_DEFAULT; LD_HWCAP_MASK environment variable here), there is no real point in setting _dl_hwcap nonzero below, but we do anyway. */ uint64_t _dl_hwcap_mask __attribute__ ((nocommon)); +#endif /* Prevailing state of the stack. Generally this includes PF_X, indicating it's * executable but this isn't true for all platforms. */ |