diff options
Diffstat (limited to 'Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ArchExceptionHandler.c')
| -rw-r--r-- | Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ArchExceptionHandler.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ArchExceptionHandler.c b/Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ArchExceptionHandler.c new file mode 100644 index 0000000000..7a183bf9a4 --- /dev/null +++ b/Core/UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ArchExceptionHandler.c @@ -0,0 +1,204 @@ +/** @file
+ IA32 CPU Exception Handler functons.
+
+ Copyright (c) 2012 - 2015, 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;
+}
+
+/**
+ Display CPU 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 - %02x(%a) CPU Apic ID - %08x !!!!\n",
+ ExceptionType,
+ GetExceptionNameStr (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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