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/** @file
IA32 CPU Exception Hanlder functons.
Copyright (c) 2012 - 2013, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "CpuExceptionCommon.h"
/**
Return address map of exception handler template so that C code can generate
exception tables.
@param IdtEntry Pointer to IDT entry to be updated.
@param InterruptHandler IDT handler value.
**/
VOID
ArchUpdateIdtEntry (
IN IA32_IDT_GATE_DESCRIPTOR *IdtEntry,
IN UINTN InterruptHandler
)
{
IdtEntry->Bits.OffsetLow = (UINT16)(UINTN)InterruptHandler;
IdtEntry->Bits.OffsetHigh = (UINT16)((UINTN)InterruptHandler >> 16);
IdtEntry->Bits.GateType = IA32_IDT_GATE_TYPE_INTERRUPT_32;
}
/**
Read IDT handler value from IDT entry.
@param IdtEntry Pointer to IDT entry to be read.
**/
UINTN
ArchGetIdtHandler (
IN IA32_IDT_GATE_DESCRIPTOR *IdtEntry
)
{
return (UINTN)IdtEntry->Bits.OffsetLow + (((UINTN)IdtEntry->Bits.OffsetHigh) << 16);
}
/**
Save CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
ArchSaveExceptionContext (
IN UINTN ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
IA32_EFLAGS32 Eflags;
//
// Save Exception context in global variable
//
mReservedVectors[ExceptionType].OldFlags = SystemContext.SystemContextIa32->Eflags;
mReservedVectors[ExceptionType].OldCs = SystemContext.SystemContextIa32->Cs;
mReservedVectors[ExceptionType].OldIp = SystemContext.SystemContextIa32->Eip;
mReservedVectors[ExceptionType].ExceptionData = SystemContext.SystemContextIa32->ExceptionData;
//
// Clear IF flag to avoid old IDT handler enable interrupt by IRET
//
Eflags.UintN = SystemContext.SystemContextIa32->Eflags;
Eflags.Bits.IF = 0;
SystemContext.SystemContextIa32->Eflags = Eflags.UintN;
//
// Modify the EIP in stack, then old IDT handler will return to the stub code
//
SystemContext.SystemContextIa32->Eip = (UINTN) mReservedVectors[ExceptionType].HookAfterStubHeaderCode;
}
/**
Restore CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
ArchRestoreExceptionContext (
IN UINTN ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
SystemContext.SystemContextIa32->Eflags = mReservedVectors[ExceptionType].OldFlags;
SystemContext.SystemContextIa32->Cs = mReservedVectors[ExceptionType].OldCs;
SystemContext.SystemContextIa32->Eip = mReservedVectors[ExceptionType].OldIp;
SystemContext.SystemContextIa32->ExceptionData = mReservedVectors[ExceptionType].ExceptionData;
}
/**
Dump CPU content information.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
DumpCpuContent (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
UINTN ImageBase;
UINTN EntryPoint;
InternalPrintMessage (
"!!!! IA32 Exception Type - %08x CPU Apic ID - %08x !!!!\n",
ExceptionType,
GetApicId ()
);
InternalPrintMessage (
"EIP - %08x, CS - %08x, EFLAGS - %08x\n",
SystemContext.SystemContextIa32->Eip,
SystemContext.SystemContextIa32->Cs,
SystemContext.SystemContextIa32->Eflags
);
if ((mErrorCodeFlag & (1 << ExceptionType)) != 0) {
InternalPrintMessage (
"ExceptionData - %08x\n",
SystemContext.SystemContextIa32->ExceptionData
);
}
InternalPrintMessage (
"EAX - %08x, ECX - %08x, EDX - %08x, EBX - %08x\n",
SystemContext.SystemContextIa32->Eax,
SystemContext.SystemContextIa32->Ecx,
SystemContext.SystemContextIa32->Edx,
SystemContext.SystemContextIa32->Ebx
);
InternalPrintMessage (
"ESP - %08x, EBP - %08x, ESI - %08x, EDI - %08x\n",
SystemContext.SystemContextIa32->Esp,
SystemContext.SystemContextIa32->Ebp,
SystemContext.SystemContextIa32->Esi,
SystemContext.SystemContextIa32->Edi
);
InternalPrintMessage (
"DS - %08x, ES - %08x, FS - %08x, GS - %08x, SS - %08x\n",
SystemContext.SystemContextIa32->Ds,
SystemContext.SystemContextIa32->Es,
SystemContext.SystemContextIa32->Fs,
SystemContext.SystemContextIa32->Gs,
SystemContext.SystemContextIa32->Ss
);
InternalPrintMessage (
"CR0 - %08x, CR2 - %08x, CR3 - %08x, CR4 - %08x\n",
SystemContext.SystemContextIa32->Cr0,
SystemContext.SystemContextIa32->Cr2,
SystemContext.SystemContextIa32->Cr3,
SystemContext.SystemContextIa32->Cr4
);
InternalPrintMessage (
"DR0 - %08x, DR1 - %08x, DR2 - %08x, DR3 - %08x\n",
SystemContext.SystemContextIa32->Dr0,
SystemContext.SystemContextIa32->Dr1,
SystemContext.SystemContextIa32->Dr2,
SystemContext.SystemContextIa32->Dr3
);
InternalPrintMessage (
"DR6 - %08x, DR7 - %08x\n",
SystemContext.SystemContextIa32->Dr6,
SystemContext.SystemContextIa32->Dr7
);
InternalPrintMessage (
"GDTR - %08x %08x, IDTR - %08x %08x\n",
SystemContext.SystemContextIa32->Gdtr[0],
SystemContext.SystemContextIa32->Gdtr[1],
SystemContext.SystemContextIa32->Idtr[0],
SystemContext.SystemContextIa32->Idtr[1]
);
InternalPrintMessage (
"LDTR - %08x, TR - %08x\n",
SystemContext.SystemContextIa32->Ldtr,
SystemContext.SystemContextIa32->Tr
);
InternalPrintMessage (
"FXSAVE_STATE - %08x\n",
&SystemContext.SystemContextIa32->FxSaveState
);
//
// Find module image base and module entry point by RIP
//
ImageBase = FindModuleImageBase (SystemContext.SystemContextIa32->Eip, &EntryPoint);
if (ImageBase != 0) {
InternalPrintMessage (
" (ImageBase=%08x, EntryPoint=%08x) !!!!\n",
ImageBase,
EntryPoint
);
}
}
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