Re: Facing a malformed packet error using Insight debugger

[Insightuser <ramaraju dot g at nxp dot com>]

Hi Keith,
Thanks for your reply.
The show version in montavista gdb shows:

(gdb) show version
GNU gdb 6.6.50.20070301 (MontaVista 6.6.50-2.0.5.0703840 2007-08-23)
Copyright (C) 2007 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-cygwin
--target=mipsel-montavista-lin
ux-gnu".

And the insight gdb shows :

(gdb) show version
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-cross-cygwin --target=mipsel-linux".

My gdbserver doesn't print any version information when it is started.
as you suggested, I would mail this to gdb mailing list as well.

thanks,
Raju

Keith Seitz wrote:
> 
> Insightuser wrote:
>> Hi,
>> I am using insight to debug my target mips2.
>> If I use the command line debugger provided by montavista, after
>> connecting
>> to my target , the resposne is 
>> 
>> (gdb) set solib-absolute-prefix .
>> (gdb) target remote 192.168.12.162:1000
>> Remote debugging using 192.168.12.162:1000
>> 0x2aaa8830 in __start () from ./lib/ld.so.1
>> (gdb) c
>> 
>> and this works fine.
> 
> You left off the version information -- what does "show version" say?
> 
> 
>> GNU gdb 6.6
>> Copyright (C) 2006 Free Software Foundation, Inc.
> 
> Wow, that is one old debugger!! I really suggest you try at least 6.8. 
> Even better: use a snapshot. Insight and gdb are always kept in a usable 
> state. I only ever use CVS HEAD for my daily work.
> 
>> [New Thread 240]
>> warning: Invalid remote reply: nf1
>> Malformed packet(b) (missing colon): 25:bcc9d62a;1d:f8aa9c7f;thread:f0;
>> Packet: 'TR242;25:bcc9d62a;1d:f8aa9c7f;thread:f0;'
> 
> I'm long out of practice with the remote protocol, but this packet does 
> look malformed. According to GDB's remote.c and the documentation, the 
> proper reply packet starting with 'T' should be 
> "TssN1:R1;N2:R2;...;Nn:Rn". ss = Signal number; N1..Nn = register 
> numbers; R1..Rn = register values. I have no idea what "nf1" could 
> possibly be.
> 
> According to remote_parse_stop_reply in remote.c, the code skips the 
> first three bytes of the packet, parsers the next two bytes as a 
> register number and looks for the colon that separates this number from 
> the value. It doesn't find the colon, and the error above is emitted.
> 
> As far as I can tell, gdb/insight are working as designed. [But again, 
> let me warn you that I am no pro at the remote protocol.] Are you 
> perhaps using some sort of custom Monta Vista extension to the remote 
> protocol?
> 
> You might have better luck with this question if you email the gdb 
> mailing list; that is where the experts hang out, many of them from 
> Monta Vista.
> 
> Keith
> 
> 

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