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| author | Keir Fraser <keir.fraser@citrix.com> | 2008-03-18 16:02:36 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2008-03-18 16:02:36 +0000 |
| commit | 402f603f49d544ba363605c8527b59cec162e878 (patch) | |
| tree | 1bd22426a3bc16b88b1d2ef368bb894b13b8d95e /xen/arch/x86/x86_emulate.c | |
| parent | 102cd68e625846f10848a0e19541bea9e2fc5a87 (diff) | |
| download | xen-402f603f49d544ba363605c8527b59cec162e878.tar.gz xen-402f603f49d544ba363605c8527b59cec162e878.tar.bz2 xen-402f603f49d544ba363605c8527b59cec162e878.zip | |
x86: check ModR/M mod bits for CR/DR access insns
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Diffstat (limited to 'xen/arch/x86/x86_emulate.c')
| -rw-r--r-- | xen/arch/x86/x86_emulate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/xen/arch/x86/x86_emulate.c b/xen/arch/x86/x86_emulate.c index 224cefb52c..b3bb4deb52 100644 --- a/xen/arch/x86/x86_emulate.c +++ b/xen/arch/x86/x86_emulate.c @@ -3219,8 +3219,8 @@ x86_emulate( case 0x21: /* mov dr,reg */ case 0x22: /* mov reg,cr */ case 0x23: /* mov reg,dr */ + generate_exception_if(ea.type != OP_REG, EXC_UD, -1); generate_exception_if(!mode_ring0(), EXC_GP, 0); - modrm_rm |= (rex_prefix & 1) << 3; modrm_reg |= lock_prefix << 3; if ( b & 2 ) { |