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| author | Adin Scannell <ascannell@google.com> | 2018-06-08 17:50:55 -0700 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2018-06-08 17:51:50 -0700 |
| commit | c0ab059e7b904197f52ade879711d7fb02ffa8c0 (patch) | |
| tree | 093689eba3e7ef08663be3d43f6c6763228ed571 /pkg/sentry/platform/ring0/x86.go | |
| parent | 2fbd1cf57cb06c5f0165a2d0e9225eed242a41f5 (diff) | |
Fix kernel flags handling and add missing vectors.
PiperOrigin-RevId: 199877174
Change-Id: I9d19ea301608c2b989df0a6123abb1e779427853
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 |