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ntoskrnl: Add emulation for 'movzx {Eb,Ew}, Gv' instruction.

This commit is contained in:
Sebastian Lackner 2015-06-19 04:07:58 +02:00 committed by Alexandre Julliard
parent 411cdebaed
commit 9c789f2949
1 changed files with 24 additions and 0 deletions
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24
dlls/ntoskrnl.exe/instr.c
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@ -675,6 +675,30 @@ static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
switch(*instr)
{
case 0x0f: /* extended instruction */
switch(instr[1])
{
case 0xb6: /* movzx Eb, Gv */
case 0xb7: /* movzx Ew, Gv */
{
BYTE *data = INSTR_GetOperandAddr( context, instr + 2, long_addr,
rex, segprefix, &len );
unsigned int data_size = (instr[1] == 0xb7) ? 2 : 1;
unsigned int offset = data - user_shared_data;
if (offset <= sizeof(KSHARED_USER_DATA) - data_size)
{
ULONGLONG temp = 0;
memcpy( &temp, wine_user_shared_data + offset, data_size );
store_reg_word( context, instr[2], (BYTE *)&temp, long_op, rex );
context->Rip += prefixlen + len + 2;
return ExceptionContinueExecution;
}
break; /* Unable to emulate it */
}
}
break; /* Unable to emulate it */
case 0x8a: /* mov Eb, Gb */
case 0x8b: /* mov Ev, Gv */
{