/** @file
Debug Library based on report status code library.
Note that if the debug message length is larger than the maximum allowable
record length, then the debug message will be ignored directly.
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.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>
#include <Library/DebugPrintErrorLevelLib.h>
//
// VA_LIST can not initialize to NULL for all compiler, so we use this to
// indicate a null VA_LIST
//
VA_LIST mVaListNull;
/**
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 DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), then print the message specified by Format and the
associated variable argument list to the debug output device.
If Format is NULL, then ASSERT().
If the length of the message string specificed by Format is larger than the maximum allowable
record length, then directly return and not print it.
@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,
...
)
{
VA_LIST Marker;
VA_START (Marker, Format);
DebugVPrint (ErrorLevel, Format, Marker);
VA_END (Marker);
}
/**
Prints a debug message to the debug output device if the specified
error level is enabled base on Null-terminated format string and a
VA_LIST argument list or a BASE_LIST argument list.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), then print the message specified by Format and
the associated variable argument list to the debug output device.
Only one list type is used.
If BaseListMarker == NULL, then use VaListMarker.
Otherwise use BaseListMarker and the VaListMarker should be initilized as
mVaListNull.
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 VaListMarker VA_LIST marker for the variable argument list.
@param BaseListMarker BASE_LIST marker for the variable argument list.
**/
VOID
DebugPrintMarker (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN VA_LIST VaListMarker,
IN BASE_LIST BaseListMarker
)
{
UINT64 Buffer[(EFI_STATUS_CODE_DATA_MAX_SIZE / sizeof (UINT64)) + 1];
EFI_DEBUG_INFO *DebugInfo;
UINTN TotalSize;
BASE_LIST BaseListMarkerPointer;
CHAR8 *FormatString;
BOOLEAN Long;
//
// If Format is NULL, then ASSERT().
//
ASSERT (Format != NULL);
//
// Check driver Debug Level value and global debug level
//
if ((ErrorLevel & GetDebugPrintErrorLevel ()) == 0) {
return;
}
//
// Compute the total size of the record.
// Note that the passing-in format string and variable parameters will be constructed to
// the following layout:
//
// Buffer->|------------------------|
// | Padding | 4 bytes
// DebugInfo->|------------------------|
// | EFI_DEBUG_INFO | sizeof(EFI_DEBUG_INFO)
// BaseListMarkerPointer->|------------------------|
// | ... |
// | variable arguments | 12 * sizeof (UINT64)
// | ... |
// |------------------------|
// | Format String |
// |------------------------|<- (UINT8 *)Buffer + sizeof(Buffer)
//
TotalSize = 4 + sizeof (EFI_DEBUG_INFO) + 12 * sizeof (UINT64) + AsciiStrSize (Format);
//
// If the TotalSize is larger than the maximum record size, then truncate it.
//
if (TotalSize > sizeof (Buffer)) {
TotalSize = sizeof (Buffer);
}
//
// Fill in EFI_DEBUG_INFO
//
// Here we skip the first 4 bytes of Buffer, because we must ensure BaseListMarkerPointer is
// 64-bit aligned, otherwise retrieving 64-bit parameter from BaseListMarkerPointer will cause
// exception on IPF. Buffer starts at 64-bit aligned address, so skipping 4 types (sizeof(EFI_DEBUG_INFO))
// just makes address of BaseListMarkerPointer, which follows DebugInfo, 64-bit aligned.
//
DebugInfo = (EFI_DEBUG_INFO *)(Buffer) + 1;
DebugInfo->ErrorLevel = (UINT32)ErrorLevel;
BaseListMarkerPointer = (BASE_LIST)(DebugInfo + 1);
FormatString = (CHAR8 *)((UINT64 *)(DebugInfo + 1) + 12);
//
// Copy the Format string into the record. It will be truncated if it's too long.
//
AsciiStrnCpyS (
FormatString, sizeof(Buffer) - (4 + sizeof(EFI_DEBUG_INFO) + 12 * sizeof(UINT64)),
Format, sizeof(Buffer) - (4 + sizeof(EFI_DEBUG_INFO) + 12 * sizeof(UINT64)) - 1
);
//
// The first 12 * sizeof (UINT64) bytes following EFI_DEBUG_INFO are for variable arguments
// of format in DEBUG string, which is followed by the DEBUG format string.
// Here we will process the variable arguments and pack them in this area.
//
//
// Use the actual format string.
//
Format = FormatString;
for (; *Format != '\0'; Format++) {
//
// Only format with prefix % is processed.
//
if (*Format != '%') {
continue;
}
Long = FALSE;
//
// Parse Flags and Width
//
for (Format++; TRUE; Format++) {
if (*Format == '.' || *Format == '-' || *Format == '+' || *Format == ' ') {
//
// These characters in format field are omitted.
//
continue;
}
if (*Format >= '0' && *Format <= '9') {
//
// These characters in format field are omitted.
//
continue;
}
if (*Format == 'L' || *Format == 'l') {
//
// 'L" or "l" in format field means the number being printed is a UINT64
//
Long = TRUE;
continue;
}
if (*Format == '*') {
//
// '*' in format field means the precision of the field is specified by
// a UINTN argument in the argument list.
//
if (BaseListMarker == NULL) {
BASE_ARG (BaseListMarkerPointer, UINTN) = VA_ARG (VaListMarker, UINTN);
} else {
BASE_ARG (BaseListMarkerPointer, UINTN) = BASE_ARG (BaseListMarker, UINTN);
}
continue;
}
if (*Format == '\0') {
//
// Make no output if Format string terminates unexpectedly when
// looking up for flag, width, precision and type.
//
Format--;
}
//
// When valid argument type detected or format string terminates unexpectedly,
// the inner loop is done.
//
break;
}
//
// Pack variable arguments into the storage area following EFI_DEBUG_INFO.
//
if ((*Format == 'p') && (sizeof (VOID *) > 4)) {
Long = TRUE;
}
if (*Format == 'p' || *Format == 'X' || *Format == 'x' || *Format == 'd' || *Format == 'u') {
if (Long) {
if (BaseListMarker == NULL) {
BASE_ARG (BaseListMarkerPointer, INT64) = VA_ARG (VaListMarker, INT64);
} else {
BASE_ARG (BaseListMarkerPointer, INT64) = BASE_ARG (BaseListMarker, INT64);
}
} else {
if (BaseListMarker == NULL) {
BASE_ARG (BaseListMarkerPointer, int) = VA_ARG (VaListMarker, int);
} else {
BASE_ARG (BaseListMarkerPointer, int) = BASE_ARG (BaseListMarker, int);
}
}
} else if (*Format == 's' || *Format == 'S' || *Format == 'a' || *Format == 'g' || *Format == 't') {
if (BaseListMarker == NULL) {
BASE_ARG (BaseListMarkerPointer, VOID *) = VA_ARG (VaListMarker, VOID *);
} else {
BASE_ARG (BaseListMarkerPointer, VOID *) = BASE_ARG (BaseListMarker, VOID *);
}
} else if (*Format == 'c') {
if (BaseListMarker == NULL) {
BASE_ARG (BaseListMarkerPointer, UINTN) = VA_ARG (VaListMarker, UINTN);
} else {
BASE_ARG (BaseListMarkerPointer, UINTN) = BASE_ARG (BaseListMarker, UINTN);
}
} else if (*Format == 'r') {
if (BaseListMarker == NULL) {
BASE_ARG (BaseListMarkerPointer, RETURN_STATUS) = VA_ARG (VaListMarker, RETURN_STATUS);
} else {
BASE_ARG (BaseListMarkerPointer, RETURN_STATUS) = BASE_ARG (BaseListMarker, RETURN_STATUS);
}
}
//
// 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 *)BaseListMarkerPointer <= FormatString);
//
// If the converted BASE_LIST is larger than the 12 * sizeof (UINT64) allocated bytes, then return
//
if ((CHAR8 *)BaseListMarkerPointer > FormatString) {
return;
}
}
//
// 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 a debug message to the debug output device if the specified
error level is enabled.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), 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 VaListMarker VA_LIST marker for the variable argument list.
**/
VOID
EFIAPI
DebugVPrint (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN VA_LIST VaListMarker
)
{
DebugPrintMarker (ErrorLevel, Format, VaListMarker, NULL);
}
/**
Prints a debug message to the debug output device if the specified
error level is enabled.
This function use BASE_LIST which would provide a more compatible
service than VA_LIST.
If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
GetDebugPrintErrorLevel (), 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 BaseListMarker BASE_LIST marker for the variable argument list.
**/
VOID
EFIAPI
DebugBPrint (
IN UINTN ErrorLevel,
IN CONST CHAR8 *Format,
IN BASE_LIST BaseListMarker
)
{
DebugPrintMarker (ErrorLevel, Format, mVaListNull, BaseListMarker);
}
/**
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 HeaderSize;
UINTN TotalSize;
CHAR8 *Temp;
UINTN ModuleNameSize;
UINTN FileNameSize;
UINTN DescriptionSize;
//
// Get string size
//
HeaderSize = sizeof (EFI_DEBUG_ASSERT_DATA);
//
// Compute string size of module name enclosed by []
//
ModuleNameSize = 2 + AsciiStrSize (gEfiCallerBaseName);
FileNameSize = AsciiStrSize (FileName);
DescriptionSize = AsciiStrSize (Description);
//
// Make sure it will all fit in the passed in buffer.
//
if (HeaderSize + ModuleNameSize + FileNameSize + DescriptionSize > sizeof (Buffer)) {
//
// remove module name if it's too long to be filled into buffer
//
ModuleNameSize = 0;
if (HeaderSize + FileNameSize + DescriptionSize > sizeof (Buffer)) {
//
// FileName + Description is too long to be filled into buffer.
//
if (HeaderSize + FileNameSize < sizeof (Buffer)) {
//
// Description has enough buffer to be truncated.
//
DescriptionSize = sizeof (Buffer) - HeaderSize - FileNameSize;
} else {
//
// FileName is too long to be filled into buffer.
// FileName will be truncated. Reserved one byte for Description NULL terminator.
//
DescriptionSize = 1;
FileNameSize = sizeof (Buffer) - HeaderSize - DescriptionSize;
}
}
}
//
// Fill in EFI_DEBUG_ASSERT_DATA
//
AssertData = (EFI_DEBUG_ASSERT_DATA *)Buffer;
AssertData->LineNumber = (UINT32)LineNumber;
TotalSize = sizeof (EFI_DEBUG_ASSERT_DATA);
Temp = (CHAR8 *)(AssertData + 1);
//
// Copy Ascii [ModuleName].
//
if (ModuleNameSize != 0) {
CopyMem(Temp, "[", 1);
CopyMem(Temp + 1, gEfiCallerBaseName, ModuleNameSize - 3);
CopyMem(Temp + ModuleNameSize - 2, "] ", 2);
}
//
// Copy Ascii FileName including NULL terminator.
//
Temp = CopyMem (Temp + ModuleNameSize, FileName, FileNameSize);
Temp[FileNameSize - 1] = 0;
TotalSize += (ModuleNameSize + FileNameSize);
//
// Copy Ascii Description include NULL terminator.
//
Temp = CopyMem (Temp + FileNameSize, Description, DescriptionSize);
Temp[DescriptionSize - 1] = 0;
TotalSize += DescriptionSize;
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 be filled with PcdDebugClearMemoryValue.
@param Length Number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue.
@return Buffer Pointer to the target buffer filled with PcdDebugClearMemoryValue.
**/
VOID *
EFIAPI
DebugClearMemory (
OUT VOID *Buffer,
IN UINTN Length
)
{
ASSERT (Buffer != NULL);
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_CLEAR_MEMORY_ENABLED bit of
PcdDebugProperyMask is set. Otherwise FALSE is returned.
@retval TRUE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
@retval FALSE The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.
**/
BOOLEAN
EFIAPI
DebugClearMemoryEnabled (
VOID
)
{
return (BOOLEAN) ((PcdGet8 (PcdDebugPropertyMask) & DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED) != 0);
}
/**
Returns TRUE if any one of the bit is set both in ErrorLevel and PcdFixedDebugPrintErrorLevel.
This function compares the bit mask of ErrorLevel and PcdFixedDebugPrintErrorLevel.
@retval TRUE Current ErrorLevel is supported.
@retval FALSE Current ErrorLevel is not supported.
**/
BOOLEAN
EFIAPI
DebugPrintLevelEnabled (
IN CONST UINTN ErrorLevel
)
{
return (BOOLEAN) ((ErrorLevel & PcdGet32(PcdFixedDebugPrintErrorLevel)) != 0);
}