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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2023-12-21 15:14:08 +0000 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2024-02-02 15:58:11 +0000 |
| commit | 1e348038b0f013ef9c30e3c4072b9555344391cb (patch) | |
| tree | 0931b1f2d05a954377a99f023bff0659c31baabf | |
| parent | 7ea8526a50e6867b154d2bb4fbe9de4ff2fc9468 (diff) | |
| download | glibc-1e348038b0f013ef9c30e3c4072b9555344391cb.tar glibc-1e348038b0f013ef9c30e3c4072b9555344391cb.tar.gz glibc-1e348038b0f013ef9c30e3c4072b9555344391cb.tar.bz2 glibc-1e348038b0f013ef9c30e3c4072b9555344391cb.zip | |
aarch64: add glibc.cpu.aarch64_gcs_policy
policy sets how gcs tunable and gcs marking turns into gcs state:
0: state = tunable
1: state = marking ? tunable : (tunable && dlopen ? err : 0)
2: state = marking ? tunable : (tunable ? err : 0)
TODO: state lock
| -rw-r--r-- | sysdeps/aarch64/dl-tunables.list | 5 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/cpu-features.c | 9 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c | 13 |
3 files changed, 25 insertions, 2 deletions
diff --git a/sysdeps/aarch64/dl-tunables.list b/sysdeps/aarch64/dl-tunables.list index c08be86932..2a07a6216b 100644 --- a/sysdeps/aarch64/dl-tunables.list +++ b/sysdeps/aarch64/dl-tunables.list @@ -26,5 +26,10 @@ glibc { minval: 0 default: 0 } + aarch64_gcs_policy { + type: UINT_64 + minval: 0 + default: 0 + } } } diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c index a8b6a4654a..bab5c32892 100644 --- a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c +++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c @@ -130,6 +130,11 @@ init_cpu_features (struct cpu_features *cpu_features) cpu_features->mops = GLRO (dl_hwcap2) & HWCAP2_MOPS; if (GLRO (dl_hwcap2) & HWCAP2_GCS) - /* GCS status may be updated later by binary compatibility checks. */ - GL (dl_aarch64_gcs) = TUNABLE_GET (glibc, cpu, aarch64_gcs, uint64_t, 0); + { + /* GCS status may be updated later by binary compatibility checks. */ + GL (dl_aarch64_gcs) = TUNABLE_GET (glibc, cpu, aarch64_gcs, uint64_t, 0); + /* Fixed GCS policy. */ + GLRO (dl_aarch64_gcs_policy) = + TUNABLE_GET (glibc, cpu, aarch64_gcs_policy, uint64_t, 0); + } } diff --git a/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c b/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c index 7af232de52..a9d5ee9df5 100644 --- a/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c +++ b/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c @@ -54,6 +54,19 @@ PROCINFO_CLASS struct cpu_features _dl_aarch64_cpu_features # else , # endif +# if !defined PROCINFO_DECL && defined SHARED + ._dl_aarch64_gcs_policy +# else +PROCINFO_CLASS uint64_t _dl_aarch64_gcs_policy +# endif +# ifndef PROCINFO_DECL += 0 +# endif +# if !defined SHARED || defined PROCINFO_DECL +; +# else +, +# endif #endif /* Number of HWCAP bits set. */ |