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Emulate "mov cr4,eax" (tombraider 3 demo).

This commit is contained in:
Marcus Meissner 1998-11-14 17:11:52 +00:00 committed by Alexandre Julliard
parent 41d1529bd5
commit 698a8b17b7
1 changed files with 18 additions and 0 deletions
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18
miscemu/instr.c
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@ -404,6 +404,24 @@ BOOL32 INSTR_EmulateInstruction( SIGCONTEXT *context )
case 0x0f: /* extended instruction */
switch(instr[1])
{
case 0x20: /* mov cr4, eax */
if (instr[2]!=0xe0)
break;
/* CR4 register . See linux/arch/i386/mm/init.c, X86_CR4_ defs
* bit 0: VME Virtual Mode Exception ?
* bit 1: PVI Protected mode Virtual Interrupt
* bit 2: TSD Timestamp disable
* bit 3: DE Debugging extensions
* bit 4: PSE Page size extensions
* bit 5: PAE Physical address extension
* bit 6: MCE Machine check enable
* bit 7: PGE Enable global pages
* bit 8: PCE Enable performance counters at IPL3
*/
fprintf(stderr,"mov cr4,eax at 0x%08lx\n",EIP_sig(context));
EAX_sig(context) = 0;
EIP_sig(context) += prefixlen+3;
return TRUE;
#ifdef FS_sig
case 0xa1: /* pop fs */
{