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author | caiyinyu <caiyinyu@loongson.cn> | 2023-09-15 17:35:19 +0800 |
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committer | caiyinyu <caiyinyu@loongson.cn> | 2024-04-24 18:22:38 +0800 |
commit | 095067efdf68c8061d6f99a21a0300841bede999 (patch) | |
tree | 6632c0cb08991fbd2c08809f24320493687c81a6 /sysdeps/unix/sysv/linux/loongarch/libc-start.c | |
parent | f4724843ada64a51d66f65d3199fe431f9d4c254 (diff) | |
download | glibc-095067efdf68c8061d6f99a21a0300841bede999.tar.gz glibc-095067efdf68c8061d6f99a21a0300841bede999.tar.xz glibc-095067efdf68c8061d6f99a21a0300841bede999.zip |
LoongArch: Add glibc.cpu.hwcap support.
The current IFUNC selection is always using the most recent features which are available via AT_HWCAP. But in some scenarios it is useful to adjust this selection. The environment variable: GLIBC_TUNABLES=glibc.cpu.hwcaps=-xxx,yyy,zzz,.... can be used to enable HWCAP feature yyy, disable HWCAP feature xxx, where the feature name is case-sensitive and has to match the ones used in sysdeps/loongarch/cpu-tunables.c. Signed-off-by: caiyinyu <caiyinyu@loongson.cn>
Diffstat (limited to 'sysdeps/unix/sysv/linux/loongarch/libc-start.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/loongarch/libc-start.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/loongarch/libc-start.c b/sysdeps/unix/sysv/linux/loongarch/libc-start.c new file mode 100644 index 0000000000..e545f7f1d7 --- /dev/null +++ b/sysdeps/unix/sysv/linux/loongarch/libc-start.c @@ -0,0 +1,34 @@ +/* Override csu/libc-start.c on LoongArch64. + Copyright (C) 2024 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/>. */ + +#ifndef SHARED + +/* Mark symbols hidden in static PIE for early self relocation to work. */ +#if BUILD_PIE_DEFAULT +# pragma GCC visibility push (hidden) +#endif + +#include <ldsodefs.h> +#include <cpu-features.c> + +extern struct cpu_features _dl_larch_cpu_features; + +#define ARCH_INIT_CPU_FEATURES() init_cpu_features (&_dl_larch_cpu_features) + +#endif +#include <csu/libc-start.c> |