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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-hwcaps.h | |
| 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-hwcaps.h')
| -rw-r--r-- | elf/dl-hwcaps.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/elf/dl-hwcaps.h b/elf/dl-hwcaps.h new file mode 100644 index 0000000000..9ce33173f1 --- /dev/null +++ b/elf/dl-hwcaps.h @@ -0,0 +1,31 @@ +/* Hardware capability support for run-time dynamic loader. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <elf/dl-tunables.h> + +#ifdef SHARED +# if HAVE_TUNABLES +# define GET_HWCAP_MASK() \ + TUNABLE_GET (glibc, tune, hwcap_mask, uint64_t, NULL) +# else +# define GET_HWCAP_MASK() GLRO(dl_hwcap_mask) +# endif +#else +/* HWCAP_MASK is ignored in static binaries. */ +# define GET_HWCAP_MASK() (0) +#endif |