893 lines
28 KiB
C
893 lines
28 KiB
C
/*
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* Emulation of privileged instructions
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*
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* Copyright 1995 Alexandre Julliard
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* Copyright 2005 Ivan Leo Puoti
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* Copyright 2005 Laurent Pinchart
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* Copyright 2014-2015 Sebastian Lackner
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#define NONAMELESSUNION
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#include "windef.h"
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#include "winbase.h"
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#include "winternl.h"
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#define WIN32_NO_STATUS
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#include "ddk/wdm.h"
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#include "excpt.h"
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#include "wine/debug.h"
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#include "wine/exception.h"
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#define KSHARED_USER_DATA_PAGE_SIZE 0x1000
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#ifdef __i386__
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WINE_DEFAULT_DEBUG_CHANNEL(int);
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#include "pshpack1.h"
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struct idtr
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{
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WORD limit;
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BYTE *base;
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};
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#include "poppack.h"
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static LDT_ENTRY idt[256];
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static inline struct idtr get_idtr(void)
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{
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struct idtr ret;
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#ifdef __GNUC__
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__asm__( "sidtl %0" : "=m" (ret) );
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#else
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ret.base = (BYTE *)idt;
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ret.limit = sizeof(idt) - 1;
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#endif
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return ret;
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}
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/* store an operand into a register */
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static void store_reg_word( CONTEXT *context, BYTE regmodrm, const BYTE *addr, int long_op )
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{
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switch((regmodrm >> 3) & 7)
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{
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case 0:
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if (long_op) context->Eax = *(const DWORD *)addr;
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else context->Eax = (context->Eax & 0xffff0000) | *(const WORD *)addr;
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break;
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case 1:
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if (long_op) context->Ecx = *(const DWORD *)addr;
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else context->Ecx = (context->Ecx & 0xffff0000) | *(const WORD *)addr;
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break;
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case 2:
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if (long_op) context->Edx = *(const DWORD *)addr;
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else context->Edx = (context->Edx & 0xffff0000) | *(const WORD *)addr;
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break;
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case 3:
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if (long_op) context->Ebx = *(const DWORD *)addr;
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else context->Ebx = (context->Ebx & 0xffff0000) | *(const WORD *)addr;
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break;
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case 4:
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if (long_op) context->Esp = *(const DWORD *)addr;
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else context->Esp = (context->Esp & 0xffff0000) | *(const WORD *)addr;
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break;
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case 5:
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if (long_op) context->Ebp = *(const DWORD *)addr;
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else context->Ebp = (context->Ebp & 0xffff0000) | *(const WORD *)addr;
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break;
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case 6:
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if (long_op) context->Esi = *(const DWORD *)addr;
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else context->Esi = (context->Esi & 0xffff0000) | *(const WORD *)addr;
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break;
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case 7:
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if (long_op) context->Edi = *(const DWORD *)addr;
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else context->Edi = (context->Edi & 0xffff0000) | *(const WORD *)addr;
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break;
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}
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}
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/* store an operand into a byte register */
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static void store_reg_byte( CONTEXT *context, BYTE regmodrm, const BYTE *addr )
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{
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switch((regmodrm >> 3) & 7)
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{
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case 0: context->Eax = (context->Eax & 0xffffff00) | *addr; break;
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case 1: context->Ecx = (context->Ecx & 0xffffff00) | *addr; break;
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case 2: context->Edx = (context->Edx & 0xffffff00) | *addr; break;
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case 3: context->Ebx = (context->Ebx & 0xffffff00) | *addr; break;
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case 4: context->Eax = (context->Eax & 0xffff00ff) | (*addr << 8); break;
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case 5: context->Ecx = (context->Ecx & 0xffff00ff) | (*addr << 8); break;
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case 6: context->Edx = (context->Edx & 0xffff00ff) | (*addr << 8); break;
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case 7: context->Ebx = (context->Ebx & 0xffff00ff) | (*addr << 8); break;
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}
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}
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static DWORD *get_reg_address( CONTEXT *context, BYTE rm )
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{
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switch (rm & 7)
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{
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case 0: return &context->Eax;
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case 1: return &context->Ecx;
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case 2: return &context->Edx;
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case 3: return &context->Ebx;
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case 4: return &context->Esp;
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case 5: return &context->Ebp;
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case 6: return &context->Esi;
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case 7: return &context->Edi;
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}
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return NULL;
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}
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/***********************************************************************
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* INSTR_GetOperandAddr
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*
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* Return the address of an instruction operand (from the mod/rm byte).
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*/
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static void *INSTR_GetOperandAddr( CONTEXT *context, BYTE *instr,
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int long_addr, int segprefix, int *len )
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{
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int mod, rm, base = 0, index = 0, ss = 0, off;
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#define GET_VAL(val,type) \
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{ *val = *(type *)instr; instr += sizeof(type); *len += sizeof(type); }
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*len = 0;
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GET_VAL( &mod, BYTE );
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rm = mod & 7;
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mod >>= 6;
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if (mod == 3) return get_reg_address( context, rm );
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if (long_addr)
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{
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if (rm == 4)
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{
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BYTE sib;
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GET_VAL( &sib, BYTE );
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rm = sib & 7;
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ss = sib >> 6;
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switch((sib >> 3) & 7)
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{
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case 0: index = context->Eax; break;
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case 1: index = context->Ecx; break;
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case 2: index = context->Edx; break;
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case 3: index = context->Ebx; break;
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case 4: index = 0; break;
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case 5: index = context->Ebp; break;
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case 6: index = context->Esi; break;
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case 7: index = context->Edi; break;
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}
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}
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switch(rm)
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{
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case 0: base = context->Eax; break;
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case 1: base = context->Ecx; break;
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case 2: base = context->Edx; break;
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case 3: base = context->Ebx; break;
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case 4: base = context->Esp; break;
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case 5: base = context->Ebp; break;
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case 6: base = context->Esi; break;
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case 7: base = context->Edi; break;
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}
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switch (mod)
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{
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case 0:
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if (rm == 5) /* special case: ds:(disp32) */
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{
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GET_VAL( &base, DWORD );
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}
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break;
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case 1: /* 8-bit disp */
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GET_VAL( &off, BYTE );
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base += (signed char)off;
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break;
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case 2: /* 32-bit disp */
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GET_VAL( &off, DWORD );
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base += (signed long)off;
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break;
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}
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}
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else /* short address */
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{
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switch(rm)
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{
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case 0: /* ds:(bx,si) */
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base = LOWORD(context->Ebx) + LOWORD(context->Esi);
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break;
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case 1: /* ds:(bx,di) */
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base = LOWORD(context->Ebx) + LOWORD(context->Edi);
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break;
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case 2: /* ss:(bp,si) */
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base = LOWORD(context->Ebp) + LOWORD(context->Esi);
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break;
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case 3: /* ss:(bp,di) */
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base = LOWORD(context->Ebp) + LOWORD(context->Edi);
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break;
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case 4: /* ds:(si) */
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base = LOWORD(context->Esi);
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break;
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case 5: /* ds:(di) */
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base = LOWORD(context->Edi);
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break;
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case 6: /* ss:(bp) */
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base = LOWORD(context->Ebp);
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break;
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case 7: /* ds:(bx) */
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base = LOWORD(context->Ebx);
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break;
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}
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switch(mod)
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{
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case 0:
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if (rm == 6) /* special case: ds:(disp16) */
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{
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GET_VAL( &base, WORD );
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}
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break;
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case 1: /* 8-bit disp */
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GET_VAL( &off, BYTE );
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base += (signed char)off;
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break;
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case 2: /* 16-bit disp */
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GET_VAL( &off, WORD );
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base += (signed short)off;
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break;
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}
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base &= 0xffff;
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}
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/* FIXME: we assume that all segments have a base of 0 */
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return (void *)(base + (index << ss));
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#undef GET_VAL
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}
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/***********************************************************************
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* emulate_instruction
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*
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* Emulate a privileged instruction.
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* Returns exception continuation status.
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*/
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static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
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{
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static const char *reg_names[8] = { "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" };
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int prefix, segprefix, prefixlen, len, long_op, long_addr;
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BYTE *instr;
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long_op = long_addr = 1;
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instr = (BYTE *)context->Eip;
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if (!instr) return ExceptionContinueSearch;
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/* First handle any possible prefix */
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segprefix = -1; /* no prefix */
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prefix = 1;
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prefixlen = 0;
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while(prefix)
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{
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switch(*instr)
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{
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case 0x2e:
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segprefix = context->SegCs;
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break;
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case 0x36:
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segprefix = context->SegSs;
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break;
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case 0x3e:
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segprefix = context->SegDs;
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break;
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case 0x26:
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segprefix = context->SegEs;
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break;
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case 0x64:
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segprefix = context->SegFs;
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break;
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case 0x65:
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segprefix = context->SegGs;
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break;
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case 0x66:
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long_op = !long_op; /* opcode size prefix */
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break;
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case 0x67:
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long_addr = !long_addr; /* addr size prefix */
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break;
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case 0xf0: /* lock */
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break;
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case 0xf2: /* repne */
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break;
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case 0xf3: /* repe */
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break;
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default:
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prefix = 0; /* no more prefixes */
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break;
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}
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if (prefix)
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{
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instr++;
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prefixlen++;
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}
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}
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/* Now look at the actual instruction */
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switch(*instr)
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{
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case 0x0f: /* extended instruction */
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switch(instr[1])
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{
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case 0x20: /* mov crX, Rd */
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{
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int reg = (instr[2] >> 3) & 7;
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DWORD *data = get_reg_address( context, instr[2] );
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TRACE( "mov cr%u,%s at 0x%08x\n", reg, reg_names[instr[2] & 7], context->Eip );
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switch (reg)
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{
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case 0: *data = 0x10; break; /* FIXME: set more bits ? */
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case 2: *data = 0; break;
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case 3: *data = 0; break;
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case 4: *data = 0; break;
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default: return ExceptionContinueSearch;
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}
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context->Eip += prefixlen + 3;
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return ExceptionContinueExecution;
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}
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case 0x21: /* mov drX, Rd */
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{
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int reg = (instr[2] >> 3) & 7;
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DWORD *data = get_reg_address( context, instr[2] );
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TRACE( "mov dr%u,%s at 0x%08x\n", reg, reg_names[instr[2] & 7], context->Eip );
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switch (reg)
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{
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case 0: *data = context->Dr0; break;
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case 1: *data = context->Dr1; break;
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case 2: *data = context->Dr2; break;
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case 3: *data = context->Dr3; break;
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case 6: *data = context->Dr6; break;
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case 7: *data = 0x400; break;
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default: return ExceptionContinueSearch;
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}
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context->Eip += prefixlen + 3;
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return ExceptionContinueExecution;
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}
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case 0x22: /* mov Rd, crX */
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{
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int reg = (instr[2] >> 3) & 7;
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DWORD *data = get_reg_address( context, instr[2] );
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TRACE( "mov %s,cr%u at 0x%08x, %s=%08x\n", reg_names[instr[2] & 7],
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reg, context->Eip, reg_names[instr[2] & 7], *data );
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switch (reg)
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{
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case 0: break;
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case 2: break;
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case 3: break;
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case 4: break;
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default: return ExceptionContinueSearch;
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}
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context->Eip += prefixlen + 3;
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return ExceptionContinueExecution;
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}
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case 0x23: /* mov Rd, drX */
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{
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int reg = (instr[2] >> 3) & 7;
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DWORD *data = get_reg_address( context, instr[2] );
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TRACE( "mov %s,dr%u at 0x%08x %s=%08x\n", reg_names[instr[2] & 7],
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reg, context->Eip, reg_names[instr[2] & 7], *data );
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switch (reg)
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{
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case 0: context->Dr0 = *data; break;
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case 1: context->Dr1 = *data; break;
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case 2: context->Dr2 = *data; break;
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case 3: context->Dr3 = *data; break;
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case 6: context->Dr6 = *data; break;
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case 7: context->Dr7 = *data; break;
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default: return ExceptionContinueSearch;
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}
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context->Eip += prefixlen + 3;
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return ExceptionContinueExecution;
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}
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}
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break;
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case 0x8a: /* mov Eb, Gb */
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case 0x8b: /* mov Ev, Gv */
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{
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BYTE *data = INSTR_GetOperandAddr(context, instr + 1, long_addr,
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segprefix, &len);
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unsigned int data_size = (*instr == 0x8b) ? (long_op ? 4 : 2) : 1;
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struct idtr idtr = get_idtr();
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unsigned int offset = data - idtr.base;
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if (offset <= idtr.limit + 1 - data_size)
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{
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idt[1].LimitLow = 0x100; /* FIXME */
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idt[2].LimitLow = 0x11E; /* FIXME */
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idt[3].LimitLow = 0x500; /* FIXME */
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switch (*instr)
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{
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case 0x8a: store_reg_byte( context, instr[1], (BYTE *)idt + offset ); break;
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case 0x8b: store_reg_word( context, instr[1], (BYTE *)idt + offset, long_op ); break;
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}
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context->Eip += prefixlen + len + 1;
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return ExceptionContinueExecution;
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}
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break; /* Unable to emulate it */
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}
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case 0xfa: /* cli */
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case 0xfb: /* sti */
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context->Eip += prefixlen + 1;
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return ExceptionContinueExecution;
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}
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return ExceptionContinueSearch; /* Unable to emulate it */
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}
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/***********************************************************************
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* vectored_handler
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*
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* Vectored exception handler used to emulate protected instructions
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* from 32-bit code.
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*/
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LONG CALLBACK vectored_handler( EXCEPTION_POINTERS *ptrs )
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{
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EXCEPTION_RECORD *record = ptrs->ExceptionRecord;
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CONTEXT *context = ptrs->ContextRecord;
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if ((record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION ||
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record->ExceptionCode == EXCEPTION_PRIV_INSTRUCTION))
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{
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if (emulate_instruction( record, context ) == ExceptionContinueExecution)
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return EXCEPTION_CONTINUE_EXECUTION;
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}
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return EXCEPTION_CONTINUE_SEARCH;
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}
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#elif defined(__x86_64__) /* __i386__ */
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WINE_DEFAULT_DEBUG_CHANNEL(int);
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#define REX_B 1
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#define REX_X 2
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#define REX_R 4
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#define REX_W 8
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#define MSR_LSTAR 0xc0000082
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#define REGMODRM_MOD( regmodrm, rex ) ((regmodrm) >> 6)
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#define REGMODRM_REG( regmodrm, rex ) (((regmodrm) >> 3) & 7) | (((rex) & REX_R) ? 8 : 0)
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#define REGMODRM_RM( regmodrm, rex ) (((regmodrm) & 7) | (((rex) & REX_B) ? 8 : 0))
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#define SIB_SS( sib, rex ) ((sib) >> 6)
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#define SIB_INDEX( sib, rex ) (((sib) >> 3) & 7) | (((rex) & REX_X) ? 8 : 0)
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#define SIB_BASE( sib, rex ) (((sib) & 7) | (((rex) & REX_B) ? 8 : 0))
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/* keep in sync with dlls/ntdll/thread.c:thread_init */
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static const BYTE *wine_user_shared_data = (BYTE *)0x7ffe0000;
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static const BYTE *user_shared_data = (BYTE *)0xfffff78000000000;
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static inline DWORD64 *get_int_reg( CONTEXT *context, int index )
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{
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return &context->Rax + index; /* index should be in range 0 .. 15 */
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}
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static inline int get_op_size( int long_op, int rex )
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{
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if (rex & REX_W)
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return sizeof(DWORD64);
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else if (long_op)
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return sizeof(DWORD);
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else
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return sizeof(WORD);
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}
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/* store an operand into a register */
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static void store_reg_word( CONTEXT *context, BYTE regmodrm, const BYTE *addr, int long_op, int rex )
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{
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int index = REGMODRM_REG( regmodrm, rex );
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BYTE *reg = (BYTE *)get_int_reg( context, index );
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|
memcpy( reg, addr, get_op_size( long_op, rex ) );
|
|
}
|
|
|
|
/* store an operand into a byte register */
|
|
static void store_reg_byte( CONTEXT *context, BYTE regmodrm, const BYTE *addr, int rex )
|
|
{
|
|
int index = REGMODRM_REG( regmodrm, rex );
|
|
BYTE *reg = (BYTE *)get_int_reg( context, index );
|
|
if (!rex && index >= 4 && index < 8) reg -= (4 * sizeof(DWORD64) - 1); /* special case: ah, ch, dh, bh */
|
|
*reg = *addr;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* INSTR_GetOperandAddr
|
|
*
|
|
* Return the address of an instruction operand (from the mod/rm byte).
|
|
*/
|
|
static BYTE *INSTR_GetOperandAddr( CONTEXT *context, BYTE *instr, int addl_instr_len,
|
|
int long_addr, int rex, int segprefix, int *len )
|
|
{
|
|
int mod, rm, ss = 0, off, have_sib = 0;
|
|
DWORD64 base = 0, index = 0;
|
|
|
|
#define GET_VAL( val, type ) \
|
|
{ *val = *(type *)instr; instr += sizeof(type); *len += sizeof(type); }
|
|
|
|
*len = 0;
|
|
GET_VAL( &mod, BYTE );
|
|
rm = REGMODRM_RM( mod, rex );
|
|
mod = REGMODRM_MOD( mod, rex );
|
|
|
|
if (mod == 3)
|
|
return (BYTE *)get_int_reg( context, rm );
|
|
|
|
if ((rm & 7) == 4)
|
|
{
|
|
BYTE sib;
|
|
int id;
|
|
|
|
GET_VAL( &sib, BYTE );
|
|
rm = SIB_BASE( sib, rex );
|
|
id = SIB_INDEX( sib, rex );
|
|
ss = SIB_SS( sib, rex );
|
|
|
|
index = (id != 4) ? *get_int_reg( context, id ) : 0;
|
|
if (!long_addr) index &= 0xffffffff;
|
|
have_sib = 1;
|
|
}
|
|
|
|
base = *get_int_reg( context, rm );
|
|
if (!long_addr) base &= 0xffffffff;
|
|
|
|
switch (mod)
|
|
{
|
|
case 0:
|
|
if (rm == 5) /* special case */
|
|
{
|
|
base = have_sib ? 0 : context->Rip;
|
|
if (!long_addr) base &= 0xffffffff;
|
|
GET_VAL( &off, DWORD );
|
|
base += (signed long)off;
|
|
base += (signed long)*len + (signed long)addl_instr_len;
|
|
}
|
|
break;
|
|
|
|
case 1: /* 8-bit disp */
|
|
GET_VAL( &off, BYTE );
|
|
base += (signed char)off;
|
|
break;
|
|
|
|
case 2: /* 32-bit disp */
|
|
GET_VAL( &off, DWORD );
|
|
base += (signed long)off;
|
|
break;
|
|
}
|
|
|
|
/* FIXME: we assume that all segments have a base of 0 */
|
|
return (BYTE *)(base + (index << ss));
|
|
#undef GET_VAL
|
|
}
|
|
|
|
|
|
static void fake_syscall_function(void)
|
|
{
|
|
TRACE("() stub\n");
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* emulate_instruction
|
|
*
|
|
* Emulate a privileged instruction.
|
|
* Returns exception continuation status.
|
|
*/
|
|
static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
|
|
{
|
|
static const char *reg_names[16] = { "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi",
|
|
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" };
|
|
int prefix, segprefix, prefixlen, len, long_op, long_addr, rex;
|
|
BYTE *instr;
|
|
|
|
long_op = long_addr = 1;
|
|
instr = (BYTE *)context->Rip;
|
|
if (!instr) return ExceptionContinueSearch;
|
|
|
|
/* First handle any possible prefix */
|
|
|
|
segprefix = -1; /* no seg prefix */
|
|
rex = 0; /* no rex prefix */
|
|
prefix = 1;
|
|
prefixlen = 0;
|
|
while(prefix)
|
|
{
|
|
switch(*instr)
|
|
{
|
|
case 0x2e:
|
|
segprefix = context->SegCs;
|
|
break;
|
|
case 0x36:
|
|
segprefix = context->SegSs;
|
|
break;
|
|
case 0x3e:
|
|
segprefix = context->SegDs;
|
|
break;
|
|
case 0x26:
|
|
segprefix = context->SegEs;
|
|
break;
|
|
case 0x64:
|
|
segprefix = context->SegFs;
|
|
break;
|
|
case 0x65:
|
|
segprefix = context->SegGs;
|
|
break;
|
|
case 0x66:
|
|
long_op = !long_op; /* opcode size prefix */
|
|
break;
|
|
case 0x67:
|
|
long_addr = !long_addr; /* addr size prefix */
|
|
break;
|
|
case 0x40: /* rex */
|
|
case 0x41:
|
|
case 0x42:
|
|
case 0x43:
|
|
case 0x44:
|
|
case 0x45:
|
|
case 0x46:
|
|
case 0x47:
|
|
case 0x48:
|
|
case 0x49:
|
|
case 0x4a:
|
|
case 0x4b:
|
|
case 0x4c:
|
|
case 0x4d:
|
|
case 0x4e:
|
|
case 0x4f:
|
|
rex = *instr;
|
|
break;
|
|
case 0xf0: /* lock */
|
|
break;
|
|
case 0xf2: /* repne */
|
|
break;
|
|
case 0xf3: /* repe */
|
|
break;
|
|
default:
|
|
prefix = 0; /* no more prefixes */
|
|
break;
|
|
}
|
|
if (prefix)
|
|
{
|
|
instr++;
|
|
prefixlen++;
|
|
}
|
|
}
|
|
|
|
/* Now look at the actual instruction */
|
|
|
|
switch(*instr)
|
|
{
|
|
case 0x0f: /* extended instruction */
|
|
switch(instr[1])
|
|
{
|
|
case 0x20: /* mov crX, Rd */
|
|
{
|
|
int reg = REGMODRM_REG( instr[2], rex );
|
|
int rm = REGMODRM_RM( instr[2], rex );
|
|
DWORD64 *data = get_int_reg( context, rm );
|
|
TRACE( "mov cr%u,%s at %lx\n", reg, reg_names[rm], context->Rip );
|
|
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;
|
|
case 8: *data = 0; break;
|
|
default: return ExceptionContinueSearch;
|
|
}
|
|
context->Rip += prefixlen + 3;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
case 0x21: /* mov drX, Rd */
|
|
{
|
|
int reg = REGMODRM_REG( instr[2], rex );
|
|
int rm = REGMODRM_RM( instr[2], rex );
|
|
DWORD64 *data = get_int_reg( context, rm );
|
|
TRACE( "mov dr%u,%s at %lx\n", reg, reg_names[rm], context->Rip );
|
|
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 4: /* dr4 and dr5 are obsolete aliases for dr6 and dr7 */
|
|
case 6: *data = context->Dr6; break;
|
|
case 5:
|
|
case 7: *data = 0x400; break;
|
|
default: return ExceptionContinueSearch;
|
|
}
|
|
context->Rip += prefixlen + 3;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
case 0x22: /* mov Rd, crX */
|
|
{
|
|
int reg = REGMODRM_REG( instr[2], rex );
|
|
int rm = REGMODRM_RM( instr[2], rex );
|
|
DWORD64 *data = get_int_reg( context, rm );
|
|
TRACE( "mov %s,cr%u at %lx, %s=%lx\n", reg_names[rm], reg, context->Rip, reg_names[rm], *data );
|
|
switch (reg)
|
|
{
|
|
case 0: break;
|
|
case 2: break;
|
|
case 3: break;
|
|
case 4: break;
|
|
case 8: break;
|
|
default: return ExceptionContinueSearch;
|
|
}
|
|
context->Rip += prefixlen + 3;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
case 0x23: /* mov Rd, drX */
|
|
{
|
|
int reg = REGMODRM_REG( instr[2], rex );
|
|
int rm = REGMODRM_RM( instr[2], rex );
|
|
DWORD64 *data = get_int_reg( context, rm );
|
|
TRACE( "mov %s,dr%u at %lx, %s=%lx\n", reg_names[rm], reg, context->Rip, reg_names[rm], *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 4: /* dr4 and dr5 are obsolete aliases for dr6 and dr7 */
|
|
case 6: context->Dr6 = *data; break;
|
|
case 5:
|
|
case 7: context->Dr7 = *data; break;
|
|
default: return ExceptionContinueSearch;
|
|
}
|
|
context->Rip += prefixlen + 3;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
case 0x32: /* rdmsr */
|
|
{
|
|
ULONG reg = context->Rcx;
|
|
TRACE("rdmsr CR 0x%08x\n", reg);
|
|
switch (reg)
|
|
{
|
|
case MSR_LSTAR:
|
|
{
|
|
ULONG_PTR syscall_address = (ULONG_PTR)fake_syscall_function;
|
|
context->Rdx = (ULONG)(syscall_address >> 32);
|
|
context->Rax = (ULONG)syscall_address;
|
|
break;
|
|
}
|
|
default: return ExceptionContinueSearch;
|
|
}
|
|
context->Rip += prefixlen + 2;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
case 0xb6: /* movzx Eb, Gv */
|
|
case 0xb7: /* movzx Ew, Gv */
|
|
{
|
|
BYTE *data = INSTR_GetOperandAddr( context, instr + 2, prefixlen + 2, long_addr,
|
|
rex, segprefix, &len );
|
|
unsigned int data_size = (instr[1] == 0xb7) ? 2 : 1;
|
|
SIZE_T offset = data - user_shared_data;
|
|
|
|
if (offset <= KSHARED_USER_DATA_PAGE_SIZE - data_size)
|
|
{
|
|
ULONGLONG temp = 0;
|
|
|
|
TRACE("USD offset %#x at %p.\n", (unsigned int)offset, (void *)context->Rip);
|
|
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 */
|
|
{
|
|
BYTE *data = INSTR_GetOperandAddr( context, instr + 1, prefixlen + 1, long_addr,
|
|
rex, segprefix, &len );
|
|
unsigned int data_size = (*instr == 0x8b) ? get_op_size( long_op, rex ) : 1;
|
|
SIZE_T offset = data - user_shared_data;
|
|
|
|
if (offset <= KSHARED_USER_DATA_PAGE_SIZE - data_size)
|
|
{
|
|
TRACE("USD offset %#x at %p.\n", (unsigned int)offset, (void *)context->Rip);
|
|
switch (*instr)
|
|
{
|
|
case 0x8a: store_reg_byte( context, instr[1], wine_user_shared_data + offset, rex ); break;
|
|
case 0x8b: store_reg_word( context, instr[1], wine_user_shared_data + offset, long_op, rex ); break;
|
|
}
|
|
context->Rip += prefixlen + len + 1;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
break; /* Unable to emulate it */
|
|
}
|
|
|
|
case 0xa0: /* mov Ob, AL */
|
|
case 0xa1: /* mov Ovqp, rAX */
|
|
{
|
|
BYTE *data = (BYTE *)(long_addr ? *(DWORD64 *)(instr + 1) : *(DWORD *)(instr + 1));
|
|
unsigned int data_size = (*instr == 0xa1) ? get_op_size( long_op, rex ) : 1;
|
|
SIZE_T offset = data - user_shared_data;
|
|
len = long_addr ? sizeof(DWORD64) : sizeof(DWORD);
|
|
|
|
if (offset <= KSHARED_USER_DATA_PAGE_SIZE - data_size)
|
|
{
|
|
TRACE("USD offset %#x at %p.\n", (unsigned int)offset, (void *)context->Rip);
|
|
memcpy( &context->Rax, wine_user_shared_data + offset, data_size );
|
|
context->Rip += prefixlen + len + 1;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
break; /* Unable to emulate it */
|
|
}
|
|
|
|
case 0xfa: /* cli */
|
|
case 0xfb: /* sti */
|
|
context->Rip += prefixlen + 1;
|
|
return ExceptionContinueExecution;
|
|
}
|
|
return ExceptionContinueSearch; /* Unable to emulate it */
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* vectored_handler
|
|
*
|
|
* Vectored exception handler used to emulate protected instructions
|
|
* from 64-bit code.
|
|
*/
|
|
LONG CALLBACK vectored_handler( EXCEPTION_POINTERS *ptrs )
|
|
{
|
|
EXCEPTION_RECORD *record = ptrs->ExceptionRecord;
|
|
CONTEXT *context = ptrs->ContextRecord;
|
|
|
|
if (record->ExceptionCode == EXCEPTION_PRIV_INSTRUCTION ||
|
|
(record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
|
|
record->ExceptionInformation[0] == EXCEPTION_READ_FAULT))
|
|
{
|
|
if (emulate_instruction( record, context ) == ExceptionContinueExecution)
|
|
{
|
|
TRACE( "next instruction rip=%lx\n", context->Rip );
|
|
TRACE( " rax=%016lx rbx=%016lx rcx=%016lx rdx=%016lx\n",
|
|
context->Rax, context->Rbx, context->Rcx, context->Rdx );
|
|
TRACE( " rsi=%016lx rdi=%016lx rbp=%016lx rsp=%016lx\n",
|
|
context->Rsi, context->Rdi, context->Rbp, context->Rsp );
|
|
TRACE( " r8=%016lx r9=%016lx r10=%016lx r11=%016lx\n",
|
|
context->R8, context->R9, context->R10, context->R11 );
|
|
TRACE( " r12=%016lx r13=%016lx r14=%016lx r15=%016lx\n",
|
|
context->R12, context->R13, context->R14, context->R15 );
|
|
|
|
return EXCEPTION_CONTINUE_EXECUTION;
|
|
}
|
|
}
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
}
|
|
|
|
#endif /* __x86_64__ */
|