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ntoskrnl.exe: More general implementation of the CRn and DRn registers. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2018-03-01 17:11:34 +01:00
parent 0cbb5d0a14
commit 9f103a9e78
1 changed files with 66 additions and 84 deletions
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150
dlls/ntoskrnl.exe/instr.c
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@ -271,6 +271,7 @@ static void *INSTR_GetOperandAddr( CONTEXT *context, BYTE *instr,
*/
static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
{
static const char *reg_names[8] = { "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" };
int prefix, segprefix, prefixlen, len, long_op, long_addr;
BYTE *instr;
@ -335,97 +336,78 @@ static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
case 0x0f: /* extended instruction */
switch(instr[1])
{
case 0x22: /* mov eax, crX */
switch (instr[2])
case 0x20: /* mov crX, Rd */
{
case 0xc0:
TRACE("mov eax,cr0 at 0x%08x, EAX=0x%08x\n", context->Eip,context->Eax );
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
case 0xe0:
TRACE("mov eax,cr4 at 0x%08x, EAX=0x%08x\n", context->Eip,context->Eax );
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
default:
break; /*fallthrough to bad instruction handling */
}
ERR("Unsupported EAX -> CR register, eip+2 is %02x\n", instr[2]);
break; /*fallthrough to bad instruction handling */
case 0x20: /* mov crX, eax */
switch (instr[2])
{
case 0xe0: /* mov cr4, eax */
/* 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
*/
TRACE("mov cr4,eax at 0x%08x\n",context->Eip);
context->Eax = 0;
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
case 0xc0: /* mov cr0, eax */
TRACE("mov cr0,eax at 0x%08x\n",context->Eip);
context->Eax = 0x10; /* FIXME: set more bits ? */
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
default: /* fallthrough to illegal instruction */
break;
}
/* fallthrough to illegal instruction */
break;
case 0x21: /* mov drX, eax */
switch (instr[2])
{
case 0xc8: /* mov dr1, eax */
TRACE("mov dr1,eax at 0x%08x\n",context->Eip);
context->Eax = context->Dr1;
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
case 0xf8: /* mov dr7, eax */
TRACE("mov dr7,eax at 0x%08x\n",context->Eip);
context->Eax = 0x400;
context->Eip += prefixlen+3;
int reg = (instr[2] >> 3) & 7;
DWORD *data = get_reg_address( context, instr[2] );
TRACE( "mov cr%u,%s at 0x%08x\n", reg, reg_names[instr[2] & 7], context->Eip );
switch (reg)
{
case 0: *data = 0x10; break; /* FIXME: set more bits ? */
case 2: *data = 0; break;
case 3: *data = 0; break;
case 4: *data = 0; break;
default: return ExceptionContinueSearch;
}
context->Eip += prefixlen + 3;
return ExceptionContinueExecution;
}
ERR("Unsupported DR register -> EAX, eip+2 is %02x\n", instr[2]);
/* fallthrough to illegal instruction */
break;
case 0x23: /* mov eax drX */
switch (instr[2])
case 0x21: /* mov drX, Rd */
{
case 0xc0: /* mov eax, dr0 */
context->Dr0 = context->Eax;
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
case 0xc8: /* mov eax, dr1 */
context->Dr1 = context->Eax;
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
case 0xd0: /* mov eax, dr2 */
context->Dr2 = context->Eax;
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
case 0xd8: /* mov eax, dr3 */
context->Dr3 = context->Eax;
context->Eip += prefixlen+3;
return ExceptionContinueExecution;
case 0xf8: /* mov eax, dr7 */
context->Dr7 = context->Eax;
context->Eip += prefixlen+3;
int reg = (instr[2] >> 3) & 7;
DWORD *data = get_reg_address( context, instr[2] );
TRACE( "mov dr%u,%s at 0x%08x\n", reg, reg_names[instr[2] & 7], context->Eip );
switch (reg)
{
case 0: *data = context->Dr0; break;
case 1: *data = context->Dr1; break;
case 2: *data = context->Dr2; break;
case 3: *data = context->Dr3; break;
case 6: *data = context->Dr6; break;
case 7: *data = 0x400; break;
default: return ExceptionContinueSearch;
}
context->Eip += prefixlen + 3;
return ExceptionContinueExecution;
}
case 0x22: /* mov Rd, crX */
{
int reg = (instr[2] >> 3) & 7;
DWORD *data = get_reg_address( context, instr[2] );
TRACE( "mov %s,cr%u at 0x%08x, %s=%08x\n", reg_names[instr[2] & 7],
reg, context->Eip, reg_names[instr[2] & 7], *data );
switch (reg)
{
case 0: break;
case 2: break;
case 3: break;
case 4: break;
default: return ExceptionContinueSearch;
}
context->Eip += prefixlen + 3;
return ExceptionContinueExecution;
}
case 0x23: /* mov Rd, drX */
{
int reg = (instr[2] >> 3) & 7;
DWORD *data = get_reg_address( context, instr[2] );
TRACE( "mov %s,dr%u at 0x%08x %s=%08x\n", reg_names[instr[2] & 7],
reg, context->Eip, reg_names[instr[2] & 7], *data );
switch (reg)
{
case 0: context->Dr0 = *data; break;
case 1: context->Dr1 = *data; break;
case 2: context->Dr2 = *data; break;
case 3: context->Dr3 = *data; break;
case 6: context->Dr6 = *data; break;
case 7: context->Dr7 = *data; break;
default: return ExceptionContinueSearch;
}
context->Eip += prefixlen + 3;
return ExceptionContinueExecution;
}
ERR("Unsupported EAX -> DR register, eip+2 is %02x\n", instr[2]);
/* fallthrough to illegal instruction */
break;
}
break; /* Unable to emulate it */
break;
case 0x8a: /* mov Eb, Gb */
case 0x8b: /* mov Ev, Gv */