On 03/15/2010 08:10 PM, Gleb Natapov wrote:
On Mon, Mar 15, 2010 at 04:46:20PM +0100, Andre Przywara wrote:
Gleb Natapov wrote:
If LOCK prefix is used dest arg should be memory, otherwise instruction
should generate #UD.
Well, there is one exception:
There is an AMD specific "lock mov cr0 = mov cr8" equivalence, where
there is no memory involved (and we intercept this). I am not sure
if anyone actually uses this code sequence, but it is definitely
legal.
Even without this patch "lock mov cr0" will cause #UD to be injected by
emulator since mov does not have Lock in opcode table. Also it look like
Intel does not support this extension so no portable program can use
it.
A portable program can check for this instruction in cpuid and only
issue it if it is supported.
--
error compiling committee.c: too many arguments to function
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