On 2015-05-18 07:15:02, lidonglin wrote:
> Thanks. And I want DEBUG() (which calls DebugPrint function) to work
> in debug version,

DEBUG() does work in the debug version. It does not work in the
release version.

> so I chang MdePkg/Include/Library/DebugLib.h : as
> below:
> Origin:
> #if !defined(MDEPKG_NDEBUG)      
>   #define DEBUG(Expression)        \
>     do {                           \
>       if (DebugPrintEnabled ()) {  \
>         _DEBUG (Expression);       \
> After change:
> #if 1      
>   #define DEBUG(Expression)        \
>     do {                           \
>       if (DebugPrintEnabled ()) {  \
>         _DEBUG (Expression);       \


If, for some reason you really want debug enabled in the RELEASE
build, then you should modify OvmfPkg/OvmfPkgX64.dsc to not set
MDEPKG_NDEBUG. But, I don't think you really want to do this.

> Then build with command line : build.sh -a x64 -b RELEASE -n 20 

Why not instead build with -b DEBUG?

Then when you run QEMU, add these parameters:

-debugcon file:debug.log -global isa-debugcon.iobase=0x402

Then after running QEMU, examine the debug.log file to see the debug
messages. The is documented in OvmfPkg/README.

> Build is ok, but error in Generating as below :

You ran out of size because you enabled debug mode in the release
build flash size.

-Jordan

> Generating FVMAIN_COMPACT FV
> 
> 
> GenFds.py...
>  : error 7000: Failed to generate FV
> 
> #######Return Value = 2
> GenFv: ERROR 3000: Invalid
>   the required fv image size 0xd49d0 exceeds the set fv image size 0xcc000
> 
> 
> ### ['GenFv', '-a', 
> '/mnt/sdg1/edk2-2.1.10/Build/OvmfX64/RELEASE_GCC44/FV/Ffs/FVMAIN_COMPACT.inf',
>  '-o', 
> '/mnt/sdg1/edk2-2.1.10/Build/OvmfX64/RELEASE_GCC44/FV/FVMAIN_COMPACT.Fv', 
> '-i', 
> '/mnt/sdg1/edk2-2.1.10/Build/OvmfX64/RELEASE_GCC44/FV/FVMAIN_COMPACT.inf']
> 
> 
> build.py...
>  : error 7000: Failed to execute command
>         GenFds -f /mnt/sdg1/edk2-2.1.10/OvmfPkg/OvmfPkgX64.fdf 
> --conf=/mnt/sdg1/edk2-2.1.10/Conf -o 
> /mnt/sdg1/edk2-2.1.10/Build/OvmfX64/RELEASE_GCC44 -t GCC44 -b RELEASE -p 
> /mnt/sdg1/edk2-2.1.10/OvmfPkg/OvmfPkgX64.dsc -a X64 -D 
> "EFI_SOURCE=/mnt/sdg1/edk2-2.1.10/EdkCompatibilityPkg" -D 
> "EDK_SOURCE=/mnt/sdg1/edk2-2.1.10/EdkCompatibilityPkg" -D 
> "TOOL_CHAIN_TAG=GCC44" -D "TOOLCHAIN=GCC44" -D "TARGET=RELEASE" -D 
> "WORKSPACE=/mnt/sdg1/edk2-2.1.10" -D 
> "EDK_TOOLS_PATH=/mnt/sdg1/edk2-2.1.10/BaseTools" -D "ARCH=X64" -D 
> "ECP_SOURCE=/mnt/sdg1/edk2-2.1.10/EdkCompatibilityPkg" [/mnt/sdg1/edk2-2.1.10]
> 
> - Failed -
> Build end time: 10:54:15, May.19 2015
> Build total time: 00:00:58
> 
> Who knows why?
> 
> > -----Original Message-----
> > From: Laszlo Ersek [mailto:ler...@redhat.com]
> > Sent: 2015年5月18日 15:35
> > To: lidonglin
> > Cc: edk2-devel@lists.sourceforge.net
> > Subject: Re: [edk2] question about size of OMVF.fd
> > 
> > On 05/18/15 08:50, lidonglin wrote:
> > > First thanks. And I ask another question. Which function can I call to
> > > print information to serial port or IO port(default 0x402)  when I
> > > build RELEASE OVMF ?
> > 
> > - The only function that currently enables someone to print to ioport
> > 0x402 (PcdDebugIoPort), and continue, is DebugPrint() in
> > "OvmfPkg/Library/PlatformDebugLibIoPort/DebugLib.c". This function is
> > normally called via the DEBUG() macro (which has no effect if you build OVMF
> > for RELEASE).
> > 
> > - You can write to the serial port with SerialPortWrite(), from
> > "MdePkg/Include/Library/SerialPortLib.h".
> > 
> > (But, honestly, there is no reason to build OVMF for anything but DEBUG,
> > ever.)
> > 
> > Thanks
> > Laszlo
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