Re: Qestion about how to debug OVMF with UDT on QEMU

["Kinney, Michael D" <michael.d.kinney@intel.com>]

Laszlo,

I works really well for me using QEMU on Windows.

* Build OVMF setting -D SOURCE_DEBUG_ENABLE and -D DEBUG_ON_SERIAL_PORT.

* Configure The UDK Debugger SoftDebugger.ini file to use TCP port 20716

  [Debug Port]
  Channel = TCP
  Server = localhost
  Port = 20716

* Configure QEMU so the monitor and serial port 
  are redirected to a tcp ports 20717 and 20716.

  -monitor tcp:localhost:20717,server
  -serial  tcp:localhost:20716,server

I use a batch file to launch the UDK debugger and
and terminal emulators immediately before running
QEMU because the tcp server in QEMU will
timeout of a connect does not happen quickly.

  start "Monitor" /B "c:\Program Files (x86)\teraterm\ttermpro.exe" localhost:20717 /nossh
  start "Debugger" /B "C:\Program Files (x86)\Intel\Intel(R) UEFI Development Kit Debugger Tool\eXdi.exe" /LaunchWinDbg
  start "Console" /B "c:\Program Files (x86)\teraterm\ttermpro.exe" localhost:20715 /nossh

  start "QEMU" /B "%QEMU_PATH%\qemu-system-i386w.exe" ^
  -machine q35,smm=on,accel=tcg -cpu Nehalem ^
  -global ICH9-LPC.disable_s3=1 ^
  -drive if=pflash,format=raw,unit=0,file=%EDKII_BUILD_OUTPUT%\FV\OVMF_CODE.fd,readonly=on ^
  -drive if=pflash,format=raw,unit=1,file=%EDKII_BUILD_OUTPUT%\FV\OVMF_VARS.fd ^
  -monitor tcp:localhost:20717,server ^
  -serial  tcp:localhost:20716,server

Since the serial connections are redirected to tcp ports
on the localhost, this actually provide an excellent
UDK Debugger experience.

Best regards,

Mike

> -----Original Message-----
> From: Laszlo Ersek [mailto:lersek@redhat.com]
> Sent: Wednesday, August 9, 2017 4:03 AM
> To: wang xiaofeng <winggundum82@163.com>; Kinney, Michael D
> <michael.d.kinney@intel.com>
> Cc: edk2-devel@lists.01.org
> Subject: Re: [edk2] Qestion about how to debug OVMF with UDT on
> QEMU
> 
> On 08/09/17 09:34, wang xiaofeng wrote:
> > Hello All,
> >    I try to debug OVMF with UDT on QEMU in windows.
> >    I build OVMF on windows 7 with VS2013 . And also runs it in
> QEMUWin32.
> >    I add   DEFINE SOURCE_DEBUG_ENABLE     = TRUE in ovmf.dsc
> and build a new bios. From makefile it seems this feature is
> enabled  for OVMF SecMain
> >
> >
> >
> $(BIN_DIR)\SourceLevelDebugPkg\Library\PeCoffExtraActionLibDebug
> \PeCoffExtraActionLibDebug\OUTPUT\PeCoffExtraActionLib.lib \
> >
> $(BIN_DIR)\SourceLevelDebugPkg\Library\DebugAgent\SecPeiDebugAge
> ntLib\OUTPUT\SecPeiDebugAgentLib.lib \
> >
> >
> >     But how can I link it to the local Windows UDT(which I
> have tested works for  real hardware bios by serail port )?
> >     Another question is why OVMF fdf don;t include
> DebugAgentPei.inf?
> >     Or I have to enable at least 1 or 2 VM for this task?
> >     Thanks in advance!
> 
> In the past I've tried to set up the UDK debugger between two
> virtual
> machines, using a UNIX domain socket to connect their serial
> ports. It
> didn't work, the debugger protocol kept falling apart. I
> suspected that
> the emulated serial ports didn't follow the timings of physical
> serial
> ports closely enough.
> 
> So, I never use SOURCE_DEBUG_ENABLE, but I think others on the
> list may
> have gotten it to work? Mike perhaps?
> 
> Thanks
> Laszlo