Re: regarding kgdb in ppc

"Anumolu Sudheer" <urwithsudheer@xxxxxxxxx> · Thu, 30 Nov 2006 10:03:11 +0530

Hi All,

As i was not able to do  kgdb with  ppc as target, i decided
to try first with two x86 PCs. On the target system  after
uncompressing the kernel i could not see any statement like 
"Waiting for connection from remote gdb". I think this is to be done by
gdbserver on the target.

I compiled the gdbserver but don't know how to use it here along with
the target kernel. Can anyone give some tips how to do it or if am
missing something .

I followed the docs - kgdb_docu_full-2.4.pdf and kgdbquickstart-2.4.pdf

Host:  x86,  RHEL-2.6.9-34.EL

Target Linux- 2.6.15.5

The kgdb version : linux-2.6.15.5-kgdb-2.4

Please let me know if any other details required.

Thanks

Sudheer 

On 11/28/06, Anumolu Sudheer <urwithsudheer@xxxxxxxxx> wrote:
Hello All

I am in process of learning kgdb and facing some problem with
gdbserver. I am not able to "configure and make"   the gdbserver .   Sorry fot the long mail.

Did anyone tried to compile the KGDB with this powerpc-eabi ?? Please help me in solving this.

Setup datails are below..

Host:  x86,  RHEL-2.6.9-34.EL

Target Linux- 2.6.16.2

Target Processor: AMCC440SPe

The kgdb version : linux-2.6.15.5-kgdb-2.4 

GDB  version gdb-6.4-kgdb-2.4.tar.bz2

CrossCompiler - powerpc-eabi

I applied the patch to the
kernel and cross compiled it.(modified to solve the compilation
errors  as is not supported readymade).

I used the steps given in "http://www.kegel.com/linux/gdbserver.txt " to build the gdb.

I compiled the gdb for host with  following commands

#ls

gdb-6.4  gdb-6.4-kgdb-2.4.tar.bz2

#mkdir ppc440
#cd ppc440
#/bin/sh ../gdb-6.4/configure --target=powerpc-eabi --with-solib-absolute-prefix=/opt/ppc440
#make
#cd ..

For gdbserver, if i give the "--target=powerpc-eabi" to "configure" script,  it says the target 

is not supported by gdbserver and if i give "--target=powerpc-linux", it doesnt show any error 
but its output doesn't look fine .  But when i do make. i get many errors saying many files 
are not found.  (Adding few required header files didnt help.)

I cross compiled the gdbserver with following commands:

[root@localhost gdb]# mkdir cross-ppc440
[root@localhost gdb]# ls
cross-ppc440  gdb-6.4  gdb-6.4-kgdb-2.4.tar.bz2  ppc440
[root@localhost

 gdb]# cd cross-ppc440/
[root@localhost cross-ppc440]#
[root@localhost cross-ppc440]# export CC=/usr/local/powerpc-eabi/bin/
[root@localhost cross-ppc440]# export CFLAGS="-mcpu=405 -D__PPC405__ -msim"

[root@localhost cross-ppc440]# export ac_cv_func_mmap_fixed_mapped=yes

[root@localhost cross-ppc440]# /bin/sh ../gdb-6.4/gdb/gdbserver/configure --target=powerpc-eabi --host=i386

configure: WARNING: If you wanted to set the --build type, don't use --host.

    If a cross compiler is detected then cross compile mode will be used.

checking for i386-gcc... /usr/local/powerpc-eabi/bin
/powerpc-eabi-gcc

checking for C compiler default output file name... a.out

checking whether the C compiler works... yes

checking whether we are cross compiling... yes

checking for suffix of executables...

checking for suffix of object files... o

checking whether we are using the GNU C compiler... yes

checking whether /usr/local/powerpc-eabi/bin/powerpc-eabi-gcc accepts -g... yes

checking for /usr/local/powerpc-eabi/bin/powerpc-eabi-gcc option to accept ANSI C... none needed

checking build system type... i686-pc-linux-gnulibc1

checking host system type... i386-pc-none

checking target system type... powerpc-unknown-eabi

checking for a BSD-compatible install... /usr/bin/install -c

checking how to run the C preprocessor... /usr/local/powerpc-eabi/bin/powerpc-eabi-gcc -E

checking for egrep... grep -E

checking for ANSI C header files... yes

checking for sys/types.h... yes

checking for sys/stat.h... yes

checking for stdlib.h... yes

checking for string.h... yes

checking for memory.h... no

checking for strings.h... no

checking for inttypes.h... no

checking for stdint.h... no

checking for unistd.h... yes

checking sgtty.h usability... no

checking sgtty.h presence... no

checking for sgtty.h... no

checking termio.h usability... no

checking termio.h presence... no

checking for termio.h... no

checking termios.h usability... no

checking termios.h presence... no

checking for termios.h... no

checking sys/reg.h usability... no

checking sys/reg.h presence... no

checking for sys/reg.h... no

checking for string.h... (cached) yes

checking proc_service.h usability... no

checking proc_service.h presence... no

checking for proc_service.h... no

checking sys/procfs.h usability... no

checking sys/procfs.h presence... no

checking for sys/procfs.h... no

checking thread_db.h usability... no

checking thread_db.h presence... no

checking for thread_db.h... no

checking linux/elf.h usability... no

checking linux/elf.h presence... no

checking for linux/elf.h... no

checking for stdlib.h... (cached) yes

checking for unistd.h... (cached) yes

checking whether strerror is declared... yes

checking for socklen_t... no

Error: target not supported by gdbserver.

[root@localhost cross-ppc440]#
[root@localhost cross-ppc440]# /bin/sh
../gdb-6.4/gdb/gdbserver/configure --target=powerpc-linux --host=i386