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ntoskrnl: Add emulation of CRn and DRn registers on x86-64. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2018-04-03 11:46:01 +02:00
parent 05d4e4a23b
commit ce09790d29
1 changed files with 103 additions and 9 deletions
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112
dlls/ntoskrnl.exe/instr.c
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@ -594,6 +594,8 @@ static BYTE *INSTR_GetOperandAddr( CONTEXT *context, BYTE *instr,
*/
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;
@ -635,21 +637,34 @@ static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
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;
break;
case 0xf2: /* repne */
break;
break;
case 0xf3: /* repe */
break;
default:
prefix = 0; /* no more prefixes */
break;
}
if (*instr >= 0x40 && *instr < 0x50) /* rex */
{
rex = *instr;
prefix = TRUE;
}
if (prefix)
{
instr++;
@ -664,6 +679,84 @@ static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
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 0xb6: /* movzx Eb, Gv */
case 0xb7: /* movzx Ew, Gv */
{
@ -738,8 +831,9 @@ LONG CALLBACK vectored_handler( EXCEPTION_POINTERS *ptrs )
EXCEPTION_RECORD *record = ptrs->ExceptionRecord;
CONTEXT *context = ptrs->ContextRecord;
if (record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
record->ExceptionInformation[0] == EXCEPTION_READ_FAULT)
if (record->ExceptionCode == EXCEPTION_PRIV_INSTRUCTION ||
(record->ExceptionCode == EXCEPTION_ACCESS_VIOLATION &&
record->ExceptionInformation[0] == EXCEPTION_READ_FAULT))
{
if (emulate_instruction( record, context ) == ExceptionContinueExecution)
{