diff options
| author | H.J. Lu <hjl.tools@gmail.com> | 2020-04-28 10:05:25 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2020-05-18 06:15:02 -0700 |
| commit | 674ea88294bfb8d89878a0ebbbcec38a85e118a5 (patch) | |
| tree | 35c81a44dc6e7eea5f406bbba208dec19f2114a7 /sysdeps/x86/cpu-features.c | |
| parent | cbfc16122e9c4948b3a17224aeb5f8b70f02417d (diff) | |
| download | glibc-674ea88294bfb8d89878a0ebbbcec38a85e118a5.zip glibc-674ea88294bfb8d89878a0ebbbcec38a85e118a5.tar.gz glibc-674ea88294bfb8d89878a0ebbbcec38a85e118a5.tar.bz2 | |
x86: Move CET control to _dl_x86_feature_control [BZ #25887]
1. Include <dl-procruntime.c> to get architecture specific initializer in
rtld_global.
2. Change _dl_x86_feature_1[2] to _dl_x86_feature_1.
3. Add _dl_x86_feature_control after _dl_x86_feature_1, which is a
struct of 2 bitfields for IBT and SHSTK control
This fixes [BZ #25887].
Diffstat (limited to 'sysdeps/x86/cpu-features.c')
| -rw-r--r-- | sysdeps/x86/cpu-features.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c index bfb415f..b6d5d9d 100644 --- a/sysdeps/x86/cpu-features.c +++ b/sysdeps/x86/cpu-features.c @@ -39,7 +39,6 @@ extern void TUNABLE_CALLBACK (set_x86_shstk) (tunable_val_t *) #if CET_ENABLED # include <dl-cet.h> -# include <cet-tunables.h> #endif static void @@ -620,7 +619,7 @@ no_cpuid: if (cet_status) { - GL(dl_x86_feature_1)[0] = cet_status; + GL(dl_x86_feature_1) = cet_status; # ifndef SHARED /* Check if IBT and SHSTK are enabled by kernel. */ @@ -644,14 +643,13 @@ no_cpuid: /* Clear the disabled bits in dl_x86_feature_1. */ if (res == 0) - GL(dl_x86_feature_1)[0] &= ~cet_feature; + GL(dl_x86_feature_1) &= ~cet_feature; } /* Lock CET if IBT or SHSTK is enabled in executable. Don't - lock CET if SHSTK is enabled permissively. */ - if (((GL(dl_x86_feature_1)[1] >> CET_MAX) - & ((1 << CET_MAX) - 1)) - != CET_PERMISSIVE) + lock CET if IBT or SHSTK is enabled permissively. */ + if (GL(dl_x86_feature_control).ibt != cet_permissive + && GL(dl_x86_feature_control).shstk != cet_permissive) dl_cet_lock_cet (); } # endif |