diff options
Diffstat (limited to 'sysdeps/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index f193ea7a2d..9ca307f521 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -27,6 +27,22 @@ extern void TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *) attribute_hidden; +#ifdef SHARED +static void +TUNABLE_CALLBACK (set_plt_rewrite) (tunable_val_t *valp) +{ + if (valp->numval != 0) + { + /* Use JMPABS only on APX processors. */ + const struct cpu_features *cpu_features = __get_cpu_features (); + GL (dl_x86_feature_control).plt_rewrite + = ((valp->numval > 1 && CPU_FEATURE_PRESENT_P (cpu_features, APX_F)) + ? plt_rewrite_jmpabs + : plt_rewrite_jmp); + } +} +#endif + #ifdef __LP64__ static void TUNABLE_CALLBACK (set_prefer_map_32bit_exec) (tunable_val_t *valp) @@ -1108,7 +1124,10 @@ no_cpuid: TUNABLE_CALLBACK (set_x86_shstk)); #endif -#ifndef SHARED +#ifdef SHARED + TUNABLE_GET (plt_rewrite, tunable_val_t *, + TUNABLE_CALLBACK (set_plt_rewrite)); +#else /* NB: In libc.a, call init_cacheinfo. */ init_cacheinfo (); #endif |