mirror of https://github.com/acidanthera/audk.git
205 lines
6.5 KiB
C
205 lines
6.5 KiB
C
/** @file
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IA32 CPU Exception Handler functons.
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Copyright (c) 2012 - 2015, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "CpuExceptionCommon.h"
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/**
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Return address map of exception handler template so that C code can generate
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exception tables.
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@param IdtEntry Pointer to IDT entry to be updated.
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@param InterruptHandler IDT handler value.
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**/
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VOID
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ArchUpdateIdtEntry (
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IN IA32_IDT_GATE_DESCRIPTOR *IdtEntry,
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IN UINTN InterruptHandler
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)
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{
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IdtEntry->Bits.OffsetLow = (UINT16)(UINTN)InterruptHandler;
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IdtEntry->Bits.OffsetHigh = (UINT16)((UINTN)InterruptHandler >> 16);
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IdtEntry->Bits.GateType = IA32_IDT_GATE_TYPE_INTERRUPT_32;
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}
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/**
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Read IDT handler value from IDT entry.
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@param IdtEntry Pointer to IDT entry to be read.
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**/
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UINTN
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ArchGetIdtHandler (
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IN IA32_IDT_GATE_DESCRIPTOR *IdtEntry
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)
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{
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return (UINTN)IdtEntry->Bits.OffsetLow + (((UINTN)IdtEntry->Bits.OffsetHigh) << 16);
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}
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/**
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Save CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
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@param ExceptionType Exception type.
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@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
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**/
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VOID
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ArchSaveExceptionContext (
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IN UINTN ExceptionType,
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IN EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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IA32_EFLAGS32 Eflags;
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//
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// Save Exception context in global variable
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//
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mReservedVectors[ExceptionType].OldFlags = SystemContext.SystemContextIa32->Eflags;
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mReservedVectors[ExceptionType].OldCs = SystemContext.SystemContextIa32->Cs;
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mReservedVectors[ExceptionType].OldIp = SystemContext.SystemContextIa32->Eip;
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mReservedVectors[ExceptionType].ExceptionData = SystemContext.SystemContextIa32->ExceptionData;
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//
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// Clear IF flag to avoid old IDT handler enable interrupt by IRET
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//
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Eflags.UintN = SystemContext.SystemContextIa32->Eflags;
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Eflags.Bits.IF = 0;
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SystemContext.SystemContextIa32->Eflags = Eflags.UintN;
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//
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// Modify the EIP in stack, then old IDT handler will return to the stub code
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//
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SystemContext.SystemContextIa32->Eip = (UINTN) mReservedVectors[ExceptionType].HookAfterStubHeaderCode;
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}
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/**
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Restore CPU exception context when handling EFI_VECTOR_HANDOFF_HOOK_AFTER case.
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@param ExceptionType Exception type.
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@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
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**/
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VOID
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ArchRestoreExceptionContext (
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IN UINTN ExceptionType,
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IN EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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SystemContext.SystemContextIa32->Eflags = mReservedVectors[ExceptionType].OldFlags;
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SystemContext.SystemContextIa32->Cs = mReservedVectors[ExceptionType].OldCs;
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SystemContext.SystemContextIa32->Eip = mReservedVectors[ExceptionType].OldIp;
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SystemContext.SystemContextIa32->ExceptionData = mReservedVectors[ExceptionType].ExceptionData;
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}
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/**
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Display CPU information.
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@param ExceptionType Exception type.
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@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
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**/
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VOID
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DumpCpuContent (
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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UINTN ImageBase;
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UINTN EntryPoint;
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InternalPrintMessage (
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"!!!! IA32 Exception Type - %02x(%a) CPU Apic ID - %08x !!!!\n",
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ExceptionType,
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GetExceptionNameStr (ExceptionType),
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GetApicId ()
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);
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InternalPrintMessage (
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"EIP - %08x, CS - %08x, EFLAGS - %08x\n",
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SystemContext.SystemContextIa32->Eip,
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SystemContext.SystemContextIa32->Cs,
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SystemContext.SystemContextIa32->Eflags
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);
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if ((mErrorCodeFlag & (1 << ExceptionType)) != 0) {
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InternalPrintMessage (
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"ExceptionData - %08x\n",
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SystemContext.SystemContextIa32->ExceptionData
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);
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}
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InternalPrintMessage (
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"EAX - %08x, ECX - %08x, EDX - %08x, EBX - %08x\n",
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SystemContext.SystemContextIa32->Eax,
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SystemContext.SystemContextIa32->Ecx,
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SystemContext.SystemContextIa32->Edx,
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SystemContext.SystemContextIa32->Ebx
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);
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InternalPrintMessage (
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"ESP - %08x, EBP - %08x, ESI - %08x, EDI - %08x\n",
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SystemContext.SystemContextIa32->Esp,
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SystemContext.SystemContextIa32->Ebp,
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SystemContext.SystemContextIa32->Esi,
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SystemContext.SystemContextIa32->Edi
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);
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InternalPrintMessage (
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"DS - %08x, ES - %08x, FS - %08x, GS - %08x, SS - %08x\n",
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SystemContext.SystemContextIa32->Ds,
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SystemContext.SystemContextIa32->Es,
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SystemContext.SystemContextIa32->Fs,
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SystemContext.SystemContextIa32->Gs,
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SystemContext.SystemContextIa32->Ss
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);
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InternalPrintMessage (
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"CR0 - %08x, CR2 - %08x, CR3 - %08x, CR4 - %08x\n",
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SystemContext.SystemContextIa32->Cr0,
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SystemContext.SystemContextIa32->Cr2,
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SystemContext.SystemContextIa32->Cr3,
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SystemContext.SystemContextIa32->Cr4
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);
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InternalPrintMessage (
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"DR0 - %08x, DR1 - %08x, DR2 - %08x, DR3 - %08x\n",
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SystemContext.SystemContextIa32->Dr0,
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SystemContext.SystemContextIa32->Dr1,
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SystemContext.SystemContextIa32->Dr2,
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SystemContext.SystemContextIa32->Dr3
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);
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InternalPrintMessage (
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"DR6 - %08x, DR7 - %08x\n",
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SystemContext.SystemContextIa32->Dr6,
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SystemContext.SystemContextIa32->Dr7
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);
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InternalPrintMessage (
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"GDTR - %08x %08x, IDTR - %08x %08x\n",
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SystemContext.SystemContextIa32->Gdtr[0],
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SystemContext.SystemContextIa32->Gdtr[1],
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SystemContext.SystemContextIa32->Idtr[0],
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SystemContext.SystemContextIa32->Idtr[1]
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);
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InternalPrintMessage (
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"LDTR - %08x, TR - %08x\n",
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SystemContext.SystemContextIa32->Ldtr,
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SystemContext.SystemContextIa32->Tr
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);
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InternalPrintMessage (
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"FXSAVE_STATE - %08x\n",
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&SystemContext.SystemContextIa32->FxSaveState
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);
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//
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// Find module image base and module entry point by RIP
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//
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ImageBase = FindModuleImageBase (SystemContext.SystemContextIa32->Eip, &EntryPoint);
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if (ImageBase != 0) {
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InternalPrintMessage (
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" (ImageBase=%08x, EntryPoint=%08x) !!!!\n",
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ImageBase,
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EntryPoint
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);
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}
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}
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