diff options
Diffstat (limited to 'sysdeps/x86')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 3 | ||||
| -rw-r--r-- | sysdeps/x86/dl-minsigstacksize.h | 27 |
2 files changed, 30 insertions, 0 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index 73b0a4dc9a..7996ed0cd2 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -21,6 +21,7 @@ #include <get-isa-level.h> #include <cacheinfo.h> #include <dl-cacheinfo.h> +#include <dl-minsigstacksize.h> #if HAVE_TUNABLES extern void TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *) @@ -364,6 +365,8 @@ get_common_indices (struct cpu_features *cpu_features, cpu_features->features[CPUID_INDEX_19].cpuid.ebx, cpu_features->features[CPUID_INDEX_19].cpuid.ecx, cpu_features->features[CPUID_INDEX_19].cpuid.edx); + + dl_check_minsigstacksize (cpu_features); } _Static_assert (((index_arch_Fast_Unaligned_Load diff --git a/sysdeps/x86/dl-minsigstacksize.h b/sysdeps/x86/dl-minsigstacksize.h new file mode 100644 index 0000000000..959871c970 --- /dev/null +++ b/sysdeps/x86/dl-minsigstacksize.h @@ -0,0 +1,27 @@ +/* Emulate AT_MINSIGSTKSZ. Generic x86 version. + Copyright (C) 2020 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +/* Emulate AT_MINSIGSTKSZ with XSAVE. */ + +static inline void +dl_check_minsigstacksize (const struct cpu_features *cpu_features) +{ + /* NB: Default to a constant MINSIGSTKSZ. */ + _Static_assert (__builtin_constant_p (MINSIGSTKSZ), + "MINSIGSTKSZ is constant"); + GLRO(dl_minsigstacksize) = MINSIGSTKSZ; +} |