diff options
Diffstat (limited to 'kernel/drivers/cpu.c')
| -rw-r--r-- | kernel/drivers/cpu.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/drivers/cpu.c b/kernel/drivers/cpu.c index 5d53bef..296e73a 100644 --- a/kernel/drivers/cpu.c +++ b/kernel/drivers/cpu.c @@ -179,12 +179,14 @@ CLEAR void cpu_enable_features(void) void clac(void) { - __asm__ volatile("clac" ::: "cc"); + if (cpu_extended_features.ebx & CPUID_EXT_FEAT_EBX_SMAP) + __asm__ volatile("clac" ::: "cc"); } void stac(void) { - __asm__ volatile("stac" ::: "cc"); + if (cpu_extended_features.ebx & CPUID_EXT_FEAT_EBX_SMAP) + __asm__ volatile("stac" ::: "cc"); } CLEAR void cli(void) |