path: root/IntelFrameworkModulePkg/Library/PeiDxeDebugLibReportStatusCode/DebugLib.c

/** @file
  Debug Library that fowards all messages to ReportStatusCode()

  Copyright (c) 2006, Intel Corporation<BR>
  All rights reserved. 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 <FrameworkPei.h>
#include <Guid/StatusCodeDataTypeId.h>
#include <Guid/StatusCodeDataTypeDebug.h>

#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/PcdLib.h>

/**

  Prints a debug message to the debug output device if the specified error level is enabled.

  If any bit in ErrorLevel is also set in PcdDebugPrintErrorLevel, then print
  the message specified by Format and the associated variable argument list to
  the debug output device.

  If Format is NULL, then ASSERT().

  @param  ErrorLevel  The error level of the debug message.
  @param  Format      Format string for the debug message to print.
  @param  ...         Variable argument list whose contents are accessed 
                      based on the format string specified by Format.

**/
VOID
EFIAPI
DebugPrint (
  IN  UINTN        ErrorLevel,
  IN  CONST CHAR8  *Format,
  ...
  )
{
  UINT64          Buffer[(EFI_STATUS_CODE_DATA_MAX_SIZE / sizeof (UINT64)) + 1];
  EFI_DEBUG_INFO  *DebugInfo;
  UINTN           TotalSize;
  VA_LIST         VaListMarker;
  BASE_LIST       BaseListMarker;
  CHAR8           *FormatString;
  BOOLEAN         Long;
  BOOLEAN         Done;

  //
  // If Format is NULL, then ASSERT().
  //
  ASSERT (Format != NULL);

  //
  // Check driver Debug Level value and global debug level
  //
  if ((ErrorLevel & PcdGet32(PcdDebugPrintErrorLevel)) == 0) {
    return;
  }

  //
  // Compute the total size of the record
  //
  TotalSize = sizeof (EFI_DEBUG_INFO) + 12 * sizeof (UINT64) + AsciiStrLen (Format) + 1;

  //
  // If the TotalSize is larger than the maximum record size, then return
  //
  if (TotalSize > sizeof (Buffer)) {
    return;
  }

  //
  // Fill in EFI_DEBUG_INFO
  //
  DebugInfo             = (EFI_DEBUG_INFO *)(Buffer) + 1;
  DebugInfo->ErrorLevel = (UINT32)ErrorLevel;
  BaseListMarker        = (BASE_LIST)(DebugInfo + 1);
  FormatString          = (CHAR8 *)((UINT64 *)(DebugInfo + 1) + 12);

  //
  // Copy the Format string into the record
  //
  AsciiStrCpy (FormatString, Format);

  //
  // 256 byte mini Var Arg stack. That is followed by the format string.
  //
  VA_START (VaListMarker, Format);
  for (; *Format != '\0'; Format++) {
    if (*Format != '%') {
      continue;
    }
    Long = FALSE;
    //
    // Parse Flags and Width
    //
    for (Done = FALSE; !Done; ) {
      Format++;
      switch (*Format) {
      case '.': 
      case '-': 
      case '+': 
      case ' ': 
      case ',': 
      case '0':
      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
      case '9':
        break;
      case 'L':
      case 'l': 
        Long = TRUE;
        break;
      case '*':
        BASE_ARG (BaseListMarker, UINTN) = VA_ARG (VaListMarker, UINTN);
        break;
      case '\0':
        //
        // Make no output if Format string terminates unexpectedly when
        // looking up for flag, width, precision and type. 
        //
        Format--;
        //
        // break skipped on purpose.
        //
      default:
        Done = TRUE;
        break;
      }
    } 
        
    //
    // Handle each argument type
    //
    switch (*Format) {
    case 'p':
      if (sizeof (VOID *) > 4) {
        Long = TRUE;
      }
    case 'X':
    case 'x':
    case 'd':
      if (Long) {
        BASE_ARG (BaseListMarker, INT64) = VA_ARG (VaListMarker, INT64);
      } else {
        BASE_ARG (BaseListMarker, int) = VA_ARG (VaListMarker, int);
      }
      break;
    case 's':
    case 'S':
    case 'a':
    case 'g':
    case 't':
      BASE_ARG (BaseListMarker, VOID *) = VA_ARG (VaListMarker, VOID *);
      break;
    case 'c':
      BASE_ARG (BaseListMarker, UINTN) = VA_ARG (VaListMarker, UINTN);
      break;
    case 'r':
      BASE_ARG (BaseListMarker, RETURN_STATUS) = VA_ARG (VaListMarker, RETURN_STATUS);
      break;
    }

    //
    // If the converted BASE_LIST is larger than the 12 * sizeof (UINT64) allocated bytes, then ASSERT()
    // This indicates that the DEBUG() macro is passing in more argument than can be handled by 
    // the EFI_DEBUG_INFO record
    //
    ASSERT ((CHAR8 *)BaseListMarker <= FormatString);

    //
    // If the converted BASE_LIST is larger than the 12 * sizeof (UINT64) allocated bytes, then return
    //
    if ((CHAR8 *)BaseListMarker > FormatString) {
      return;
    }
  }
  VA_END (VaListMarker);

  //
  // Send the DebugInfo record
  //
  REPORT_STATUS_CODE_EX (
    EFI_DEBUG_CODE,
    (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_DC_UNSPECIFIED),
    0,
    NULL,
    &gEfiStatusCodeDataTypeDebugGuid,
    DebugInfo,
    TotalSize
    );
}

/**

  Prints an assert message containing a filename, line number, and description.
  This may be followed by a breakpoint or a dead loop.

  Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n"
  to the debug output device.  If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of
  PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if
  DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then
  CpuDeadLoop() is called.  If neither of these bits are set, then this function
  returns immediately after the message is printed to the debug output device.
  DebugAssert() must actively prevent recursion.  If DebugAssert() is called while
  processing another DebugAssert(), then DebugAssert() must return immediately.

  If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.

  If Description is NULL, then a <Description> string of "(NULL) Description" is printed.

  @param  FileName     Pointer to the name of the source file that generated the assert condition.
  @param  LineNumber   The line number in the source file that generated the assert condition
  @param  Description  Pointer to the description of the assert condition.

**/
VOID
EFIAPI
DebugAssert (
  IN CONST CHAR8  *FileName,
  IN UINTN        LineNumber,
  IN CONST CHAR8  *Description
  )
{
  UINT64                 Buffer[EFI_STATUS_CODE_DATA_MAX_SIZE / sizeof(UINT64)];
  EFI_DEBUG_ASSERT_DATA  *AssertData;
  UINTN                  TotalSize;
  CHAR8                  *Temp;
  UINTN                  FileNameLength;
  UINTN                  DescriptionLength;

  //
  // Make sure it will all fit in the passed in buffer
  //
  FileNameLength    = AsciiStrLen (FileName);
  DescriptionLength = AsciiStrLen (Description);
  TotalSize = sizeof (EFI_DEBUG_ASSERT_DATA) + FileNameLength + 1 + DescriptionLength + 1;
  if (TotalSize <= sizeof (Buffer)) {
    //
    // Fill in EFI_DEBUG_ASSERT_DATA
    //
    AssertData = (EFI_DEBUG_ASSERT_DATA *)Buffer;
    AssertData->LineNumber = (UINT32)LineNumber;

    //
    // Copy Ascii FileName including NULL.
    //
    Temp = AsciiStrCpy ((CHAR8 *)(AssertData + 1), FileName);

    //
    // Copy Ascii Description
    //
    AsciiStrCpy (Temp + AsciiStrLen (FileName) + 1, Description);

    REPORT_STATUS_CODE_EX (
      (EFI_ERROR_CODE | EFI_ERROR_UNRECOVERED),
      (EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_EC_ILLEGAL_SOFTWARE_STATE),
      0,
      NULL,
      NULL,
      AssertData,
      TotalSize
      );
  }

  //
  // Generate a Breakpoint, DeadLoop, or NOP based on PCD settings
  //
  if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED) != 0) {
    CpuBreakpoint ();
  } else if ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED) != 0) {
    CpuDeadLoop ();
  }
}


/**

  Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.

  This function fills Length bytes of Buffer with the value specified by
  PcdDebugClearMemoryValue, and returns Buffer.

  If Buffer is NULL, then ASSERT().

  If Length is greater than (MAX_ADDRESS ? Buffer + 1), then ASSERT().

  @param   Buffer  Pointer to the target buffer to fill with PcdDebugClearMemoryValue.
  @param   Length  Number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.

  @return  Buffer

**/
VOID *
EFIAPI
DebugClearMemory (
  OUT VOID  *Buffer,
  IN UINTN  Length
  )
{
  //
  // If Buffer is NULL, then ASSERT().
  //
  ASSERT (Buffer != NULL);

  //
  // SetMem() checks for the the ASSERT() condition on Length and returns Buffer
  //
  return SetMem (Buffer, Length, PcdGet8(PcdDebugClearMemoryValue));
}


/**

  Returns TRUE if ASSERT() macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugAssertEnabled (
  VOID
  )
{
  return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED) != 0);
}


/**

  Returns TRUE if DEBUG()macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugPrintEnabled (
  VOID
  )
{
  return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_PRINT_ENABLED) != 0);
}


/**

  Returns TRUE if DEBUG_CODE()macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugCodeEnabled (
  VOID
  )
{
  return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_DEBUG_CODE_ENABLED) != 0);
}


/**

  Returns TRUE if DEBUG_CLEAR_MEMORY()macro is enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.

**/
BOOLEAN
EFIAPI
DebugClearMemoryEnabled (
  VOID
  )
{
  return (BOOLEAN) ((PcdGet8(PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0);
}