setupldr!BlOutputLoadMessage函数和setupldr!SlWriteStatusText函数分析
kd> p
Breakpoint 10 hit
eax=003828fc ebx=00000000 ecx=00382414 edx=003828f8 esi=00348198 edi=00002335
eip=00323246 esp=00060bb0 ebp=00060df4 iopl=0 nv up di pl zr na pe nc
cs=0008 ss=0010 ds=0010 es=0010 fs=0030 gs=0000 efl=00000046
setupldr!BlOutputLoadMessage:
00323246 55 push ebp
kd> dv
DeviceName = 0x8021cb28 "multi(0)disk(0)cdrom(159)"
FileName = 0x00348198 "\I386\ntkrnlmp.exe"
FileDescription = 0x003828fc "Windows Executive.."
OutputBuffer = char [256] "???"
dots = 0n0
kd> kc 6
00 setupldr!BlOutputLoadMessage
01 setupldr!SlInit
02 setupldr!BlStartup
03 setupldr!NtProcessStartup
WARNING: Frame IP not in any known module. Following frames may be wrong.
04 0x0
05 0x0
kd> gu
Breakpoint 9 hit
eax=00060aac ebx=00000000 ecx=00060a78 edx=00060adc esi=00348198 edi=00002335
eip=00329dfa esp=00060aa4 ebp=00060bac iopl=0 nv up di pl nz na pe nc
cs=0008 ss=0010 ds=0010 es=0010 fs=0030 gs=0000 efl=00000006
setupldr!SlWriteStatusText:
00329dfa 55 push ebp
kd> kc 6
00 setupldr!SlWriteStatusText
01 setupldr!BlOutputLoadMessage
02 setupldr!SlInit
03 setupldr!BlStartup
04 setupldr!NtProcessStartup
WARNING: Frame IP not in any known module. Following frames may be wrong.
05 0x0
kd> dv
Text = 0x00060aac "Setup is loading files (Windows Executive..)....."
AttributeSave = 0xfa ''
Count = 8
VOID
BlOutputLoadMessage (
IN PCHAR DeviceName,
IN PCHAR FileName,
IN PTCHAR FileDescription OPTIONAL
)
{
static int dots = 0;
TCHAR OutputBuffer[256];
PTCHAR FormatString;
UNREFERENCED_PARAMETER( FileName );
UNREFERENCED_PARAMETER( DeviceName );
//
// Construct and output loading file message.
//
if (!UseRegularBackground) {
FormatString = BlFindMessage(SL_FILE_LOAD_MESSAGE);
if (FileDescription) {
_stprintf(OutputBuffer,FormatString,FileDescription);
SlWriteStatusText(OutputBuffer);
}
}
return;
}
D:\srv03rtm\base\boot\setup\daytona\obj\i386\msgs.h
//
// MessageId: SL_FILE_LOAD_MESSAGE
//
// MessageText:
//
// Setup is loading files (%s)...
//
#define SL_FILE_LOAD_MESSAGE 0x0000232CL
VOID
SlWriteStatusText(
IN PTCHAR Text
)
{
UCHAR AttributeSave = CurAttribute;
PTCHAR p;
ULONG Count;
#ifdef EFI
ULONG MaxWidth = ScreenWidth - 3;
#else
ULONG MaxWidth = ScreenWidth - 2;
#endif
//
// Nop, if status bar is disabled
//
if (!StatusBarEnabled) {
return;
}
//
// if we're writing to a terminal, we don't want to write into the lower
// right corner as this would make us scroll.
//
if (BlTerminalConnected) {
MaxWidth -= 1;
}
if (MaxWidth > MAX_STATUS) {
MaxWidth = MAX_STATUS;
}
#ifdef UNICODE
for (Count = 0 ; Count < sizeof(StatusText)/sizeof(TCHAR);Count++) {
StatusText[Count] = TEXT(' ');
}
#else
RtlFillMemory(StatusText,sizeof(StatusText),' ');
#endif
//
// Strip cr/lf as we copy the status text into the status text buffer.
//
p = StatusText;
Count = 0;
while((Count < MaxWidth) && *Text) {
if((*Text != TEXT('\r')) && (*Text != TEXT('\n'))) {
*p++ = *Text;
Count++;
}
Text++;
}
SlSetCurrentAttribute(StatusAttribute);
SlPositionCursor(0,ScreenHeight-1);最后一行
ArcWrite(ARC_CONSOLE_OUTPUT,TEXT(" "),2*sizeof(TCHAR),&Count);2个空格
SlPositionCursor(2,ScreenHeight-1);
ArcWrite(ARC_CONSOLE_OUTPUT,StatusText,MaxWidth*sizeof(TCHAR),&Count);
SlSetCurrentAttribute(AttributeSave);
SlPositionCursor(0,5);
}