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Definition at line 633 of file traphdlr.c. {
PUCHAR Instruction;
ULONG i;
KIRQL OldIrql;
/* Check for V86 GPF */
if (__builtin_expect(KiV86Trap(TrapFrame), 1))
{
/* Enter V86 trap */
KiEnterV86Trap(TrapFrame);
/* Must be a VDM process */
if (__builtin_expect(!PsGetCurrentProcess()->VdmObjects, 0))
{
/* Enable interrupts */
_enable();
/* Setup illegal instruction fault */
KiDispatchException0Args(STATUS_ILLEGAL_INSTRUCTION,
TrapFrame->Eip,
TrapFrame);
}
/* Go to APC level */
OldIrql = KfRaiseIrql(APC_LEVEL);
_enable();
/* Check for BOP */
if (!VdmDispatchBop(TrapFrame))
{
/* Should only happen in VDM mode */
UNIMPLEMENTED_FATAL();
}
/* Bring IRQL back */
KfLowerIrql(OldIrql);
_disable();
/* Do a quick V86 exit if possible */
KiExitV86Trap(TrapFrame);
}
/* Save trap frame */
KiEnterTrap(TrapFrame);
/* Enable interrupts */
Instruction = (PUCHAR)TrapFrame->Eip;
_enable();
/* Check for user trap */
if (KiUserTrap(TrapFrame))
{
/* FIXME: Use SEH */
/* Scan next 4 opcodes */
for (i = 0; i < 4; i++)
{
/* Check for LOCK instruction */
if (Instruction[i] == 0xF0)
{
/* Send invalid lock sequence exception */
KiDispatchException0Args(STATUS_INVALID_LOCK_SEQUENCE,
TrapFrame->Eip,
TrapFrame);
}
}
/* FIXME: SEH ends here */
}
/* Kernel-mode or user-mode fault (but not LOCK) */
KiDispatchException0Args(STATUS_ILLEGAL_INSTRUCTION,
TrapFrame->Eip,
TrapFrame);
}
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