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GDB with serial port

From: Pandi k <pandiwelcomes at gmail dot com>
To: gdb-testers at sourceware dot org
Date: Sat, 10 Apr 2010 10:50:45 +0530
Subject: GDB with serial port

Hi, am working on x86, linux 2.6.21 kernel and it's corresponding
patches and also using gdb6.4 to debug my target machine(x86) from
host machine(x86). For this, i have successfully complied kgdb patched
kernel and tried to connect target from host machine using rdb remote
serial port communication.

I used following command to connect and it shows below error

gdb: target remote /dev/ttyS0
remote debugging using /dev/ttyS0
Ignoring packet error, continuing,
Ignoring packet error, continuing,
Ignoring packet error, continuing,
Malformed response to offset query, timeout
gdb:

What could be reason for this and how to i debug and solve?  i checked
null modem cable using minicom it is working...

Thanks,
Pandi

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