Re: [PATCH] arm reversible : <phase_2_complete>

[chandra krishnappa <chandra_roadking@yahoo.com>]

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Kindly suggest some steps or operations which confirms the basic host and target communication is working fine..

I am stuck up with connection itself....

1. Copied "gdbserver" ( ARM compiled ) on to target board.
./gdbserver 192.168.1.2:9876 ../from_host/test_arm

2. start gdb from host system
personal@computer:~/Desktop/gdb-7.3/gdb-7.3$ ./gdb/gdb
GNU gdb (GDB) 7.3
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) target remote 192.168.1.6:9876
Remote debugging using 192.168.1.6:9876
warning: Can not parse XML target description; XML support was disabled at compile time
0x400007b0 in ?? ()
(gdb) continue
Continuing.
Cannot access memory at address 0x0
[Inferior 1 (Remote target) exited normally]



On the remote target the complete program is just executing and showing the results...

Not able to debug the program step by step not even any break..

Am searching for some step by step host : target gdb setup through cris-cross cables...

I dont have serial port on my laptop, generally there are more articles on serial connections... seems that used by most ..


Parallel I am looking at running dejagnu testsuite for x86 locally.. thinking of extend the x86 execution method of connection of host and target for ARM Board..

http://ftp.gnu.org/old-gnu/Manuals/gdb-5.1.1/html_node/gdb_130.html
the things in the above link, I have followed... later stuffs are not clear to me.. Logs attached for the reference...
Thanks & Regards,
-Chandra K


--- On Thu, 7/14/11, Yao Qi <yao@codesourcery.com> wrote:

> From: Yao Qi <yao@codesourcery.com>
> Subject: Re: [PATCH] arm reversible : <phase_2_complete>
> To: gdb-patches@sourceware.org
> Date: Thursday, July 14, 2011, 11:57 AM
> On 07/14/2011 09:39 AM, chandra
> krishnappa wrote:
> > 2. gdb test development active members, with whom I
> may seek help??
> 
> You may have a look at this page about writing test cases
> for gdb
> http://sourceware.org/gdb/wiki/GDBTestcaseCookbook
> 
> -- 
> Yao (齐尧)
>

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test.c  
compile c program and copy on to target board.
( linux$ arm-none-linux-gnueabi-gcc-4.5.1 -g test.c -o test_arm )

--------

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
	int i=0;
	int j;

	for (j=0;j<=10;j++) {
		i=(int)random();
		printf("i=%d when j=%d\n",i,j);
	}
	
return 0;
}

[-- Attachment #3: Host_messages --]
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Host PC ( 192.168.1.2 )

personal@computer:~/Desktop/gdb-7.3/gdb-7.3$ ./gdb/gdb
GNU gdb (GDB) 7.3
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.

(gdb) target remote 192.168.1.6:9876
Remote debugging using 192.168.1.6:9876
warning: Can not parse XML target description; XML support was disabled at compile time
0x400007b0 in ?? ()

(gdb) break main
No symbol table is loaded.  Use the "file" command.
Make breakpoint pending on future shared library load? (y or [n]) n

(gdb) bt
#0  0x400007b0 in ?? ()
Cannot access memory at address 0x0
#1  0x00000000 in ?? ()

(gdb) target record
(gdb) break main
No symbol table is loaded.  Use the "file" command.
Make breakpoint pending on future shared library load? (y or [n]) n
(gdb) continue
Continuing.
regcache.c:178: internal-error: register_size: Assertion `regnum >= 0 && regnum < (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch))' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) y

regcache.c:178: internal-error: register_size: Assertion `regnum >= 0 && regnum < (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch))' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n

personal@computer:~/Desktop/gdb-7.3/gdb-7.3$ ./gdb/gdb
GNU gdb (GDB) 7.3
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) target remote 192.168.1.6:9876
Remote debugging using 192.168.1.6:9876
warning: Can not parse XML target description; XML support was disabled at compile time
0x400007b0 in ?? ()
(gdb) continue
Continuing.
Cannot access memory at address 0x0
[Inferior 1 (Remote target) exited normally]

(gdb) target remote 192.168.1.6:9876
Remote debugging using 192.168.1.6:9876
0x400007b0 in ?? ()

(gdb) target record

(gdb) continue
Continuing.
Cannot access memory at address 0x0
regcache.c:178: internal-error: register_size: Assertion `regnum >= 0 && regnum < (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch))' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) n

regcache.c:178: internal-error: register_size: Assertion `regnum >= 0 && regnum < (gdbarch_num_regs (gdbarch) + gdbarch_num_pseudo_regs (gdbarch))' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n
0x400007b0 in ?? ()



[-- Attachment #4: Target_messages --]
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Target Board ( ARM ) 192.168.1.6

-----


[root@EmbedSky gdbserver]# ./gdbserver 192.168.1.2:9876 ../from_host/test_arm 
Process ../from_host/test_arm created; pid = 644
Listening on port 9876
Remote debugging from host 192.168.1.2
i=1804289383 when j=0
i=846930886 when j=1
i=1681692777 when j=2
i=1714636915 when j=3
i=1957747793 when j=4
i=424238335 when j=5
i=719885386 when j=6
i=1649760492 when j=7
i=596516649 when j=8
i=1189641421 when j=9
i=1025202362 when j=10

Child exited with status 0
GDBserver exiting

[root@EmbedSky gdbserver]# ./gdbserver 192.168.1.2:9876 ../from_host/test_arm 
Process ../from_host/test_arm created; pid = 648
Listening on port 9876
Remote debugging from host 192.168.1.2
i=1804289383 when j=0
i=846930886 when j=1
i=1681692777 when j=2
i=1714636915 when j=3
i=1957747793 when j=4
i=424238335 when j=5
i=719885386 when j=6
i=1649760492 when j=7
i=596516649 when j=8
i=1189641421 when j=9
i=1025202362 when j=10

Child exited with status 0
GDBserver exiting

[root@EmbedSky gdbserver]# ./gdbserver 192.168.1.2:9876 ../from_host/test_arm 
Process ../from_host/test_arm created; pid = 652
Listening on port 9876
Remote debugging from host 192.168.1.2
Killing all inferiors

[root@EmbedSky gdbserver]# ./gdbserver 192.168.1.2:9876 ../from_host/test_arm 
Process ../from_host/test_arm created; pid = 656
Listening on port 9876
Remote debugging from host 192.168.1.2
readchar: Got EOF
Remote side has terminated connection.  GDBserver will reopen the connection.
Listening on port 9876


Remote debugging from host 192.168.1.2
i=1804289383 when j=0
i=846930886 when j=1
i=1681692777 when j=2
i=1714636915 when j=3
i=1957747793 when j=4
i=424238335 when j=5
i=719885386 when j=6
i=1649760492 when j=7
i=596516649 when j=8
i=1189641421 when j=9
i=1025202362 when j=10

Child exited with status 0
GDBserver exiting

[root@EmbedSky gdbserver]# ./gdbserver 192.168.1.2:9876 ../from_host/test_arm 
Process ../from_host/test_arm created; pid = 660
Listening on port 9876
Remote debugging from host 192.168.1.2
Killing all inferiors
[root@EmbedSky gdbserver]#