Setting up for remote debugging

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This article was previously published under Q121543

SUMMARY

This article outlines how to set up for remote debugging.

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MORE INFORMATION

To set up to remotely debug another computer, do the following:

Remove the System, Hidden, & ReadOnly attributes of the BOOT.INI file and append the following strings to the boot line:
/BAUDRATE=9600 /DEBUGPORT=COM#
For example:
[operating systems]
multi(0)...partition(1)\NT="WinNT/S Ver:3.5" /DEBUGPORT=COM1
/BAUDRATE=9600

Run Terminal against the above Com Port with the debug modem attached and enter the modem commands which set the following:

     Function                              USRobotics
     -------------------------------------------------
     Set back to Factory Defaults:         AT&F
     Disable Transmit Data Flow Control:   AT&H0
     Disable Receive Data Flow Control:    AT&I0
     Disable Data Compression:             AT&K0
     Disable Error Control:                AT&M0
     Auto Answer On:                       ATS0=1
     Disable Reset Modem on loss of DTR:   AT&D0
     Write to NVRAM:                       AT&W

Determine the base build of the remote computer (using WinMSD, WinVer),

511, 528, 807

and copy the corresponding debug files from the base build:

<Compact Disc>\Support\Debug\<platformType>\*.* files to a
<localDebug>\ directory and the corresponding Kernel & Hal *.DBG
files from
<Compact Disc>\Support\Debug\<platformType>\Symbols\EXE and
<Compact Disc>\Support\Debug\<platformType>\Symbols\DLL respectively.

For example:

XCOPY E:\Support\Debug\i386\*.* C:\WinNT\Debug
XCOPY E:\Support\Debug\i386\Symbols\EXE\NTKRNLMP.DBG ...
... C:\WinNT\Debug\Symbols\EXE /s /e
XCOPY E:\Support\Debug\i386\Symbols\EXE\NTOSKRNL.DBG ...
... C:\WinNT\Debug\Symbols\EXE /s /e
XCOPY E:\Support\Debug\i386\Symbols\DLL\HAL*.* ...
... C:\WinNT\Debug\Symbols\DLL /s /e

where drive E: is the CD-ROM drive.

NOTE: Using different (debugger 807 <-> target 528) kernel debuggers may prevent debuggers from "Sync"-ing.
Determine the Service Pack (SP) version (using WinMSD, WinVer),

SP1, SP2, SP2b

and copy the SP Symbols tree to the <localSymbols> directory. For more information on the SP Symbols tree, contact Microsoft Product Support Services (Enterprise Technical Support).

For example:

XCOPY <Source SP Symbols path> C:\WinNT\Debug\Symbols /s /e

Determine what Hotfixes, if any, have been installed,

Prb18756, Bug18756

and copy the Hotfix Symbols tree to <localSymbols\<dir>\. For more information on the Hotfix Symbols tree, contact Microsoft Product Support Services (Enterprise Technical Support).

For example:

XCOPY http://hotfix (http://hotfix)

Determine if you are using the Microsoft or third-party MP Kernel. If it is Microsoft's MP Kernel, then from <localSymbols>\EXE, copy NTKRNLMP.DBG to NTOSKRNL.DBG. If it is a third-party MP Kernel, obtain a copy of the symbols and copy it into your <localSymbols>\EXE\NTOSKRNL.DBG.
Determine if you are using the Microsoft Windows NT HAL or a third-party HAL. If it is a Microsoft Windows NT HAL, but not the standard ISA/EISA HAL, then from <localSymbols>\DLL, copy the appropriate HAL*.DBG to HAL.DBG. If it is a third-party HAL, obtain a copy of the symbols and copy it into your <localSymbols>\DLL\HAL.DBG.
Connect the modem to the remote debug target computer using the port from above and reboot the target computer.

Go to the <localDebug> directory and run the following REMDBG.BAT file:

      REM Modem String to Disable Flow Control and Compression
      ECHO "UsRobotics Modem string = AT&H0&I0&K0&M0"

      REM Environment Variables:

      REM Specify which com port to use. (Default = com1)
      set _NT_DEBUG_PORT=com1

      REM Specify symbol image path. (Default = x: * NO trailing
         backslash *)
      set _NT_SYMBOL_PATH=%2\Symbols

      REM Specify second symbol image path to be searched after the above.
      set _NT_ALT_SYMBOL_PATH=%3\Symbols

      REM Specify the baud rate used by debugging serial port.
         (Default = 19200)
      set _NT_DEBUG_BAUD_RATE=9600

      REM If specified, output will be APPENDed to this file.
      set _NT_DEBUG_LOG_FILE_APPEND=DEBUG.LOG

      REM If specified, output will be written to this file from offset 0.
      REM set _NT_DEBUG_LOG_FILE_OPEN=U:\WinNT\DEBUG\DEBUG.LOG

      REM set _NT_DEBUG_CACHE_SIZE=x

      remote /s "%1kd -m %4 %5 %6 %7 %8 %9" debug

      REM Usage: *kd [-?] [-v] [-m] [-r] [-n] [-b] [-x] [[-l
      SymbolFile] [KrnlName]
      REM     where:
      REM             -v      Verbose mode
      REM             -?      Display this help
      REM             -n      No Lazy symbol loading
      REM             -m      Use modem controls
      REM             -b      Break into kernel
      REM                    -c          Resync on Connect

      REM Control Keys:

      REM     . <Ctrl-C> Break into kernel
      REM       <Ctrl-B><Enter> Quit debugger
      REM     . <Ctrl-R><Enter> Resynchronize target and host
      REM     . <Ctrl-V><Enter> Toggle Verbose mode
      REM     . <Ctrl-D><Enter> Display debugger debugging information

   through the following command:

   [u:\winnt\debug] remdbg <kd> <localSymbols> <baseBuildpath> <addOptions>
                             ^        ^             ^              ^
   Kernel Debugger to use ---+        |             |              |
      Example: i386 | MIPS | Alpha    |             |              |
                                      |             |              |
   localSymbols without Symbols name -+             |              |
      Example: c:\winnt\debug                       |              |
                                                    |              |
   baseBuild (UNC) without Symbols name ------------+              |
      Example: <Symbols server>\528\i386                           |
                                                                   |
   Additional Debug Options ---------------------------------------+
      Example: -b (Break In on Connect) -c (Resync on Connect)

Contact Microsoft Product Support Services (Enterprise Technical Support) for more information on the <Symbols server>.

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Example

remdbg i386 u:\winnt\debug <Symbols server>\528\i386 -b
"UsRobotics Modem string = AT&H0&I0&K0&M0"

**************************************
***********     REMOTE    ************
***********     SERVER    ************
**************************************

To Connect: Remote /C MARCM.PORT debug

Microsoft(R) Windows NT Kernel Debugger
Version 1.00
(C) 1991 Microsoft Corp.

Symbol search path is: u:\winnt\debug\Symbols;.;
KD: ntoskrnl.exe image based at 80100000
KD: Preloading kernel symbols from u:\winnt\debug\Symbols\exe\ntoskrnl.DBG.
KD: waiting to connect...
KD: No carrier detect - in terminal mode

>From here, paste in the above Modem String and wait for the modem to return OK. Then enter the ATDT<Phone number> of the remote target computer as below: AT&H0&I0&K0&M0
AT&H0&I0&K0&M0

OK
ATDT9,<Phone number>
ATDT9,<Phone number>

CONNECT 9600
KD: Carrier detect - returning to debugger
^R \\ Resync's the debuggers
KD: Kernel Debugger connection established. (Initial Breakpoint requested)
NT!_KeUpdateSystemTime+0x109:
8015e109 cc int 3
kd>

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For information on how to enable remote debugging in Windows XP Service Pack 2, visit the following Microsoft Web site:

http://msdn.microsoft.com/security/productinfo/xpsp2/default.aspx?pull=/library/en-us/dnwxp/html/xpsp2remotedebug.asp (http://msdn.microsoft.com/security/productinfo/xpsp2/default.aspx?pull=/library/en-us/dnwxp/html/xpsp2remotedebug.asp)

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