UefiCpuPkg/Library/CpuExceptionHandlerLib/Ia32/ArchExceptionHandler.c

   1 /** @file
   2   IA32 CPU Exception Hanlder functons.
   3
   4   Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "CpuExceptionCommon.h"
  16
  17 /**
  18   Internal function to setup CPU exception handlers.
  19
  20 **/
  21 VOID
  22 InternalSetupCpuExceptionHandlers (
  23   VOID
  24   )
  25 {
  26   IA32_DESCRIPTOR                     IdtDescriptor;
  27   UINTN                               IdtSize;
  28   EXCEPTION_HANDLER_TEMPLATE_MAP      TemplateMap;
  29   UINT16                              CodeSegment;
  30   IA32_IDT_GATE_DESCRIPTOR            *IdtEntry;
  31   UINTN                               Index;
  32   UINTN                               InterruptHandler;;
  33
  34   //
  35   // Read IDT descriptor and calculate IDT size
  36   //
  37   AsmReadIdtr (&IdtDescriptor);
  38   IdtSize = (IdtDescriptor.Limit + 1) / sizeof (IA32_IDT_GATE_DESCRIPTOR);
  39   if (IdtSize > CPU_EXCEPTION_NUM) {
  40     //
  41     // CPU exeption library only setup CPU_EXCEPTION_NUM exception handler at most
  42     //
  43     IdtSize = CPU_EXCEPTION_NUM;
  44   }
  45
  46   //
  47   // Use current CS as the segment selector of interrupt gate in IDT
  48   //
  49   CodeSegment = AsmReadCs ();
  50   IdtEntry = (IA32_IDT_GATE_DESCRIPTOR *) IdtDescriptor.Base;
  51
  52   GetTemplateAddressMap (&TemplateMap);
  53
  54   for (Index = 0; Index < IdtSize; Index ++) {
  55     InterruptHandler = TemplateMap.ExceptionStart + Index * TemplateMap.ExceptionStubHeaderSize;
  56     IdtEntry[Index].Bits.OffsetLow  = (UINT16)(UINTN)InterruptHandler;
  57     IdtEntry[Index].Bits.OffsetHigh = (UINT16)((UINTN)InterruptHandler >> 16);
  58     IdtEntry[Index].Bits.Selector   = CodeSegment;
  59     IdtEntry[Index].Bits.GateType   = IA32_IDT_GATE_TYPE_INTERRUPT_32;
  60   }
  61 }
  62
  63 /**
  64   Dump CPU content information.
  65
  66   @param ExceptionType  Exception type.
  67   @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.
  68 **/
  69 VOID
  70 DumpCpuContent (
  71   IN UINTN                ExceptionType,
  72   IN EFI_SYSTEM_CONTEXT   SystemContext
  73   )
  74 {
  75   UINTN                   ImageBase;
  76   UINTN                   EntryPoint;
  77
  78   InternalPrintMessage (
  79     "!!!! IA32 Exception Type - %08x    CPU Apic ID - %08x !!!!\n",
  80     ExceptionType,
  81     GetApicId ()
  82     );
  83   InternalPrintMessage (
  84     "EIP  - %08x, CS  - %08x, EFLAGS - %08x\n",
  85     SystemContext.SystemContextIa32->Eip,
  86     SystemContext.SystemContextIa32->Cs,
  87     SystemContext.SystemContextIa32->Eflags
  88     );
  89   if ((mErrorCodeFlag & (1 << ExceptionType)) != 0) {
  90     InternalPrintMessage (
  91       "ExceptionData - %08x\n",
  92       SystemContext.SystemContextIa32->ExceptionData
  93       );
  94   }
  95   InternalPrintMessage (
  96     "EAX  - %08x, ECX - %08x, EDX - %08x, EBX - %08x\n",
  97     SystemContext.SystemContextIa32->Eax,
  98     SystemContext.SystemContextIa32->Ecx,
  99     SystemContext.SystemContextIa32->Edx,
 100     SystemContext.SystemContextIa32->Ebx
 101     );
 102   InternalPrintMessage (
 103     "ESP  - %08x, EBP - %08x, ESI - %08x, EDI - %08x\n",
 104     SystemContext.SystemContextIa32->Esp,
 105     SystemContext.SystemContextIa32->Ebp,
 106     SystemContext.SystemContextIa32->Esi,
 107     SystemContext.SystemContextIa32->Edi
 108     );
 109   InternalPrintMessage (
 110     "DS   - %08x, ES  - %08x, FS  - %08x, GS  - %08x, SS - %08x\n",
 111     SystemContext.SystemContextIa32->Ds,
 112     SystemContext.SystemContextIa32->Es,
 113     SystemContext.SystemContextIa32->Fs,
 114     SystemContext.SystemContextIa32->Gs,
 115     SystemContext.SystemContextIa32->Ss
 116     );
 117   InternalPrintMessage (
 118     "CR0  - %08x, CR2 - %08x, CR3 - %08x, CR4 - %08x\n",
 119     SystemContext.SystemContextIa32->Cr0,
 120     SystemContext.SystemContextIa32->Cr2,
 121     SystemContext.SystemContextIa32->Cr3,
 122     SystemContext.SystemContextIa32->Cr4
 123     );
 124   InternalPrintMessage (
 125     "DR0  - %08x, DR1 - %08x, DR2 - %08x, DR3 - %08x\n",
 126     SystemContext.SystemContextIa32->Dr0,
 127     SystemContext.SystemContextIa32->Dr1,
 128     SystemContext.SystemContextIa32->Dr2,
 129     SystemContext.SystemContextIa32->Dr3
 130     );
 131   InternalPrintMessage (
 132     "DR6  - %08x, DR7 - %08x\n",
 133     SystemContext.SystemContextIa32->Dr6,
 134     SystemContext.SystemContextIa32->Dr7
 135     );
 136   InternalPrintMessage (
 137     "GDTR - %08x %08x, IDTR - %08x %08x\n",
 138     SystemContext.SystemContextIa32->Gdtr[0],
 139     SystemContext.SystemContextIa32->Gdtr[1],
 140     SystemContext.SystemContextIa32->Idtr[0],
 141     SystemContext.SystemContextIa32->Idtr[1]
 142     );
 143   InternalPrintMessage (
 144     "LDTR - %08x, TR - %08x\n",
 145     SystemContext.SystemContextIa32->Ldtr,
 146     SystemContext.SystemContextIa32->Tr
 147     );
 148   InternalPrintMessage (
 149     "FXSAVE_STATE - %08x\n",
 150     &SystemContext.SystemContextIa32->FxSaveState
 151     );
 152
 153   //
 154   // Find module image base and module entry point by RIP
 155   //
 156   ImageBase = FindModuleImageBase (SystemContext.SystemContextIa32->Eip, &EntryPoint);
 157   if (ImageBase != 0) {
 158     InternalPrintMessage (
 159       " (ImageBase=%08x, EntryPoint=%08x) !!!!\n",
 160       ImageBase,
 161       EntryPoint
 162       );
 163   }
 164 }