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Emulate (well, ignore) mov cr0,eax and mov eax,cr0.

This commit is contained in:
Marcus Meissner 1999-03-12 16:55:46 +00:00 committed by Alexandre Julliard
parent ea1640fc0c
commit 9d9e0606a4
1 changed files with 40 additions and 18 deletions
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58
miscemu/instr.c
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@ -411,24 +411,46 @@ BOOL INSTR_EmulateInstruction( SIGCONTEXT *context )
case 0x0f: /* extended instruction */ case 0x0f: /* extended instruction */
switch(instr[1]) switch(instr[1])
{ {
case 0x20: /* mov cr4, eax */ case 0x22: /* mov eax, crX */
if (instr[2]!=0xe0) switch (instr[2]) {
break; case 0xc0:
/* CR4 register . See linux/arch/i386/mm/init.c, X86_CR4_ defs fprintf(stderr,"mov eax,cr0 at 0x%08lx, EAX=0x%08lx\n",
* bit 0: VME Virtual Mode Exception ? EIP_sig(context),EAX_sig(context)
* bit 1: PVI Protected mode Virtual Interrupt );
* bit 2: TSD Timestamp disable EIP_sig(context) += prefixlen+3;
* bit 3: DE Debugging extensions return TRUE;
* bit 4: PSE Page size extensions default:
* bit 5: PAE Physical address extension break; /*fallthrough to bad instruction handling */
* bit 6: MCE Machine check enable }
* bit 7: PGE Enable global pages break; /*fallthrough to bad instruction handling */
* bit 8: PCE Enable performance counters at IPL3 case 0x20: /* mov crX, eax */
*/ switch (instr[2]) {
fprintf(stderr,"mov cr4,eax at 0x%08lx\n",EIP_sig(context)); case 0xe0: /* mov cr4, eax */
EAX_sig(context) = 0; /* CR4 register . See linux/arch/i386/mm/init.c, X86_CR4_ defs
EIP_sig(context) += prefixlen+3; * bit 0: VME Virtual Mode Exception ?
return TRUE; * 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;
case 0xc0: /* mov cr0, eax */
fprintf(stderr,"mov cr0,eax at 0x%08lx\n",EIP_sig(context));
EAX_sig(context) = 0x10; /* FIXME: set more bits ? */
EIP_sig(context) += prefixlen+3;
return TRUE;
default: /* fallthrough to illegal instruction */
break;
}
/* fallthrough to illegal instruction */
break;
#ifdef FS_sig #ifdef FS_sig
case 0xa1: /* pop fs */ case 0xa1: /* pop fs */
{ {