diff options
Diffstat (limited to 'pkg/sentry/platform/ring0/x86.go')
| -rw-r--r-- | pkg/sentry/platform/ring0/x86.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/pkg/sentry/platform/ring0/x86.go b/pkg/sentry/platform/ring0/x86.go index 74b140066..3d437a77c 100644 --- a/pkg/sentry/platform/ring0/x86.go +++ b/pkg/sentry/platform/ring0/x86.go @@ -24,6 +24,7 @@ import ( const ( _CR0_PE = 1 << 0 _CR0_ET = 1 << 4 + _CR0_AM = 1 << 18 _CR0_PG = 1 << 31 _CR4_PSE = 1 << 4 @@ -55,6 +56,20 @@ const ( _MSR_SYSCALL_MASK = 0xc0000084 ) +const ( + // KernelFlagsSet should always be set in the kernel. + KernelFlagsSet = _RFLAGS_RESERVED + + // UserFlagsSet are always set in userspace. + UserFlagsSet = _RFLAGS_RESERVED | _RFLAGS_IF + + // KernelFlagsClear should always be clear in the kernel. + KernelFlagsClear = _RFLAGS_STEP | _RFLAGS_IF | _RFLAGS_IOPL | _RFLAGS_AC | _RFLAGS_NT + + // UserFlagsClear are always cleared in userspace. + UserFlagsClear = _RFLAGS_NT | _RFLAGS_IOPL +) + // Vector is an exception vector. type Vector uintptr |