diff options
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index a832019..b7adfcc 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -83,6 +83,7 @@ #define Group (1<<14) /* Bits 3:5 of modrm byte extend opcode */ #define GroupDual (1<<15) /* Alternate decoding of mod == 3 */ /* Misc flags */ +#define Op3264 (1<<24) /* Operand is 64b in long mode, 32b otherwise */ #define Undefined (1<<25) /* No Such Instruction */ #define Lock (1<<26) /* lock prefix is allowed for the instruction */ #define Priv (1<<27) /* instruction generates #GP if current CPL != 0 */ @@ -2406,6 +2407,13 @@ done_prefixes: if (mode == X86EMUL_MODE_PROT64 && (c->d & Stack)) c->op_bytes = 8; + if (c->d & Op3264) { + if (mode == X86EMUL_MODE_PROT64) + c->op_bytes = 8; + else + c->op_bytes = 4; + } + /* ModRM and SIB bytes. */ if (c->d & ModRM) { rc = decode_modrm(ctxt, ops); |