Added a library for the default exception handler and started to add a dissasembler. Cleaned up some issues with BlockIo in BeagleBoard and add some extra info on Ebl devices command to show if a blk device has a file system on it.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9830 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
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/** @file
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Default exception handler
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Copyright (c) 2008-2010, Apple Inc. All rights reserved.
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All rights reserved. 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 <Uefi.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PeCoffGetEntryPointLib.h>
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#include <Guid/DebugImageInfoTable.h>
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#include <Protocol/DebugSupport.h>
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#include <Protocol/LoadedImage.h>
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VOID
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DisassembleArmInstruction (
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IN UINT32 *OpCodePtr,
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OUT CHAR8 *Buf,
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OUT UINTN Size
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);
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VOID
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DisassembleThumbInstruction (
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IN UINT16 *OpCodePtr,
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OUT CHAR8 *Buf,
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OUT UINTN Size
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);
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EFI_DEBUG_IMAGE_INFO_TABLE_HEADER *gDebugImageTableHeader = NULL;
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typedef struct {
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UINT32 BIT;
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CHAR8 Char;
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} CPSR_CHAR;
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/**
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Use the EFI Debug Image Table to lookup the FaultAddress and find which PE/COFF image
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it came from. As long as the PE/COFF image contains a debug directory entry a
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string can be returned. For ELF and Mach-O images the string points to the Mach-O or ELF
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image. Microsoft tools contain a pointer to the PDB file that contains the debug information.
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@param FaultAddress Address to find PE/COFF image for.
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@param ImageBase Return load address of found image
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@param PeCoffSizeOfHeaders Return the size of the PE/COFF header for the image that was found
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@retval NULL FaultAddress not in a loaded PE/COFF image.
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@retval Path and file name of PE/COFF image.
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**/
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CHAR8 *
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GetImageName (
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IN UINT32 FaultAddress,
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OUT UINT32 *ImageBase,
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OUT UINT32 *PeCoffSizeOfHeaders
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)
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{
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EFI_DEBUG_IMAGE_INFO *DebugTable;
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UINTN Entry;
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CHAR8 *Address;
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DebugTable = gDebugImageTableHeader->EfiDebugImageInfoTable;
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if (DebugTable == NULL) {
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return NULL;
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}
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Address = (CHAR8 *)(UINTN)FaultAddress;
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for (Entry = 0; Entry < gDebugImageTableHeader->TableSize; Entry++, DebugTable++) {
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if (DebugTable->NormalImage != NULL) {
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if ((DebugTable->NormalImage->ImageInfoType == EFI_DEBUG_IMAGE_INFO_TYPE_NORMAL) &&
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(DebugTable->NormalImage->LoadedImageProtocolInstance != NULL)) {
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if ((Address >= (CHAR8 *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase) &&
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(Address <= ((CHAR8 *)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase + DebugTable->NormalImage->LoadedImageProtocolInstance->ImageSize))) {
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*ImageBase = (UINT32)DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase;
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*PeCoffSizeOfHeaders = PeCoffGetSizeOfHeaders ((VOID *)(UINTN)*ImageBase);
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return PeCoffLoaderGetPdbPointer (DebugTable->NormalImage->LoadedImageProtocolInstance->ImageBase);
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}
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}
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}
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}
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return NULL;
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}
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/**
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Convert the Current Program Status Register (CPSR) to a string. The string is
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a defacto standard in the ARM world.
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It is possible to add extra bits by adding them to CpsrChar array.
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@param Cpsr ARM CPSR register value
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@param ReturnStr 32 byte string that contains string version of CPSR
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**/
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VOID
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CpsrString (
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IN UINT32 Cpsr,
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OUT CHAR8 *ReturnStr
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)
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{
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UINTN Index;
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CHAR8 *Str = ReturnStr;
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CHAR8 *ModeStr;
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CPSR_CHAR CpsrChar[] = {
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{ 31, 'n' },
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{ 30, 'z' },
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{ 29, 'c' },
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{ 28, 'v' },
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{ 9, 'e' },
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{ 8, 'a' },
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{ 7, 'i' },
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{ 6, 'f' },
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{ 5, 't' },
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{ 0, '?' }
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};
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for (Index = 0; CpsrChar[Index].BIT != 0; Index++, Str++) {
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*Str = CpsrChar[Index].Char;
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if ((Cpsr & (1 << CpsrChar[Index].BIT)) != 0) {
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// Concert to upper case if bit is set
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*Str &= ~0x20;
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}
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}
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*Str++ = '_';
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*Str = '\0';
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switch (Cpsr & 0x1f) {
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case 0x10:
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ModeStr = "usr";
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break;
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case 0x011:
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ModeStr = "fiq";
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break;
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case 0x12:
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ModeStr = "irq";
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break;
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case 0x13:
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ModeStr = "svc";
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break;
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case 0x16:
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ModeStr = "mon";
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break;
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case 0x17:
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ModeStr = "abt";
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break;
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case 0x1b:
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ModeStr = "und";
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break;
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case 0x1f:
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ModeStr = "sys";
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break;
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default:
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ModeStr = "???";
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break;
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}
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AsciiStrCat (Str, ModeStr);
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return;
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}
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CHAR8 *gExceptionTypeString[] = {
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"Reset",
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"Undefined OpCode",
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"SWI",
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"Prefetch Abort",
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"Data Abort",
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"Undefined",
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"IRQ",
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"FIQ"
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};
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/**
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This is the default action to take on an unexpected exception
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Since this is exception context don't do anything crazy like try to allcoate memory.
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@param ExceptionType Type of the exception
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@param SystemContext Register state at the time of the Exception
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**/
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VOID
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DefaultExceptionHandler (
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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DEBUG ((EFI_D_ERROR, "\n%a Exception PC at 0x%08x CPSR 0x%08x ", gExceptionTypeString[ExceptionType], SystemContext.SystemContextArm->PC, SystemContext.SystemContextArm->CPSR));
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DEBUG_CODE_BEGIN ();
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CHAR8 *Pdb;
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UINT32 ImageBase;
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UINT32 PeCoffSizeOfHeader;
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UINT32 Offset;
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CHAR8 CpsrStr[32]; // char per bit. Lower 5-bits are mode that is a 3 char string
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CHAR8 Buffer[80];
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CpsrString (SystemContext.SystemContextArm->CPSR, CpsrStr);
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DEBUG ((EFI_D_ERROR, "%a\n", CpsrStr));
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Pdb = GetImageName (SystemContext.SystemContextArm->PC, &ImageBase, &PeCoffSizeOfHeader);
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Offset = SystemContext.SystemContextArm->PC - ImageBase;
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if (Pdb != NULL) {
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DEBUG ((EFI_D_ERROR, "%a\n", Pdb));
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//
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// A PE/COFF image loads its headers into memory so the headers are
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// included in the linked addressess. ELF and Mach-O images do not
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// include the headers so the first byte of the image is usually
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// text (code). If you look at link maps from ELF or Mach-O images
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// you need to subtact out the size of the PE/COFF header to get
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// get the offset that matches the link map.
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//
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DEBUG ((EFI_D_ERROR, "loaded at 0x%08x (PE/COFF offset) 0x%x (ELF or Mach-O offset) 0x%x", ImageBase, Offset, Offset - PeCoffSizeOfHeader));
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// If we come from an image it is safe to show the instruction. We know it should not fault
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if ((SystemContext.SystemContextArm->CPSR & 0x20) == 0) {
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// ARM
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DisassembleArmInstruction ((UINT32 *)(UINTN)SystemContext.SystemContextArm->PC, Buffer, sizeof (Buffer));
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DEBUG ((EFI_D_ERROR, "\n%a", Buffer));
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} else {
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// Thumb
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DEBUG ((EFI_D_ERROR, "\nFaulting Instruction 0x%04x", (UINT16 *)(UINTN)SystemContext.SystemContextArm->PC));
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}
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}
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DEBUG_CODE_END ();
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DEBUG ((EFI_D_ERROR, "\n R0 0x%08x R1 0x%08x R2 0x%08x R3 0x%08x\n", SystemContext.SystemContextArm->R0, SystemContext.SystemContextArm->R1, SystemContext.SystemContextArm->R2, SystemContext.SystemContextArm->R3));
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DEBUG ((EFI_D_ERROR, " R4 0x%08x R5 0x%08x R6 0x%08x R7 0x%08x\n", SystemContext.SystemContextArm->R4, SystemContext.SystemContextArm->R5, SystemContext.SystemContextArm->R6, SystemContext.SystemContextArm->R7));
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DEBUG ((EFI_D_ERROR, " R8 0x%08x R9 0x%08x R10 0x%08x R11 0x%08x\n", SystemContext.SystemContextArm->R8, SystemContext.SystemContextArm->R9, SystemContext.SystemContextArm->R10, SystemContext.SystemContextArm->R11));
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DEBUG ((EFI_D_ERROR, " R12 0x%08x SP 0x%08x LR 0x%08x PC 0x%08x\n", SystemContext.SystemContextArm->R12, SystemContext.SystemContextArm->SP, SystemContext.SystemContextArm->LR, SystemContext.SystemContextArm->PC));
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DEBUG ((EFI_D_ERROR, "DFSR 0x%08x DFAR 0x%08x IFSR 0x%08x IFAR 0x%08x\n\n", SystemContext.SystemContextArm->DFSR, SystemContext.SystemContextArm->DFAR, SystemContext.SystemContextArm->IFSR, SystemContext.SystemContextArm->IFAR));
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ASSERT (FALSE);
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}
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/**
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The constructor function caches EFI Debug table information for use in the exception handler.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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DefaultExceptionHandlerConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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Status = EfiGetSystemConfigurationTable (&gEfiDebugImageInfoTableGuid, (VOID **)&gDebugImageTableHeader);
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if (EFI_ERROR (Status)) {
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gDebugImageTableHeader = NULL;
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}
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return Status;
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}
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