GDB commands and GDB protocol

GDB commands and GDB protocol

[Guillaume MENANT]

Hello, I'm replacing a proprietary application (GRMON) by a free GDB wrapper (to make the link between GDB protocol and a specific one used by GRMON)
In order to do this, I'm seeking a document which would explain the GDB protocol (TCP link) and all mandatory commands in order to interface my application with Eclipse+CDT.
Thanks.
-- 

Guillaume Menant

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Re: GDB commands and GDB protocol

[Daniel Jacobowitz]

On Thu, Oct 11, 2007 at 10:13:20AM +0200, Guillaume MENANT wrote:
> Hello, I'm replacing a proprietary application (GRMON) by a free GDB wrapper 
> (to make the link between GDB protocol and a specific one used by GRMON)
> In order to do this, I'm seeking a document which would explain the GDB 
> protocol (TCP link) and all mandatory commands in order to interface my 
> application with Eclipse+CDT.

There is documentation of the remote protocol in the manual.  If
there's anything unclear about it, please ask here so we can improve
the documentation.

-- 
Daniel Jacobowitz
CodeSourcery

Re: GDB commands and GDB protocol

[Guillaume MENANT]

I've found this page : 
http://sources.redhat.com/gdb/onlinedocs/gdb_33.html#SEC679
I still have some questions :
- We just have to handle commands from the page above to manage the GDB 
protocol (in TCP) ? The is no specific encapsulation ?
- How does Eclipse will know internal registers of my chip (registers 
like sp, pc,  ...) ? Using qXfer and a XML file ? Is it mandatory for a 
debugger to know internal registers ?

Guillaume Menant


Daniel Jacobowitz a écrit :
> On Thu, Oct 11, 2007 at 10:13:20AM +0200, Guillaume MENANT wrote:
>   
>> Hello, I'm replacing a proprietary application (GRMON) by a free GDB wrapper 
>> (to make the link between GDB protocol and a specific one used by GRMON)
>> In order to do this, I'm seeking a document which would explain the GDB 
>> protocol (TCP link) and all mandatory commands in order to interface my 
>> application with Eclipse+CDT.
>>     
>
> There is documentation of the remote protocol in the manual.  If
> there's anything unclear about it, please ask here so we can improve
> the documentation.
>
>   

Re: GDB commands and GDB protocol

[Daniel Jacobowitz]

On Thu, Oct 11, 2007 at 02:41:17PM +0200, Guillaume MENANT wrote:
> I've found this page : 
> http://sources.redhat.com/gdb/onlinedocs/gdb_33.html#SEC679
> I still have some questions :
> - We just have to handle commands from the page above to manage the GDB 
> protocol (in TCP) ? The is no specific encapsulation ?

The Overview at the top of that page describes the encapsulation.

> - How does Eclipse will know internal registers of my chip (registers like sp, 
> pc,  ...) ? Using qXfer and a XML file ? Is it mandatory for a debugger to know 
> internal registers ?

The standard registers, like sp and pc, Eclipse will get the names
directly from GDB.  It's only if you have extra board-specific or
core-specific registers that you need to deal with XML descriptions.

-- 
Daniel Jacobowitz
CodeSourcery

Re: GDB commands and GDB protocol

[Daniel Jacobowitz]

On Fri, Oct 12, 2007 at 09:35:07AM +0200, Guillaume MENANT wrote:
> I've got an question about the use of GDB. When my wrapper application will 
> handle all commands described here : 
> http://sources.redhat.com/gdb/onlinedocs/gdb_33.html#SEC713, how will I load my 
> embedded application ? GDB handle RAM/Flash commands but there is no "load" 
> command. So when I will make a "Load program" in Eclipse, will it use GDB 
> (RAM/Flash commands) ?

Yes, it will.  There's no special remote packets for load.

-- 
Daniel Jacobowitz
CodeSourcery

Re: GDB commands and GDB protocol

[Guillaume MENANT]

I've got an question about the use of GDB. When my wrapper application 
will handle all commands described here : 
http://sources.redhat.com/gdb/onlinedocs/gdb_33.html#SEC713, how will I 
load my embedded application ? GDB handle RAM/Flash commands but there 
is no "load" command. So when I will make a "Load program" in Eclipse, 
will it use GDB (RAM/Flash commands) ?
Thanks.

Guillaume Menant


Daniel Jacobowitz a écrit :
> On Thu, Oct 11, 2007 at 03:00:21PM +0200, Guillaume MENANT wrote:
>   
>> Thanks a lot for your answers. Another question : Where does GDB will get 
>> information about the standard internal registers of my chip (a SPARC V8 in my 
>> case) ?
>>     
>
> What sort of information do you mean?
>
> The GDB port to SPARC knows the names and uses of the standard SPARC registers.
>
>   

Re: GDB commands and GDB protocol

[Daniel Jacobowitz]

On Thu, Oct 11, 2007 at 03:00:21PM +0200, Guillaume MENANT wrote:
> Thanks a lot for your answers. Another question : Where does GDB will get 
> information about the standard internal registers of my chip (a SPARC V8 in my 
> case) ?

What sort of information do you mean?

The GDB port to SPARC knows the names and uses of the standard SPARC registers.

-- 
Daniel Jacobowitz
CodeSourcery

Re: GDB commands and GDB protocol

[Guillaume MENANT]

Thanks a lot for your answers. Another question : Where does GDB will 
get information about the standard internal registers of my chip (a 
SPARC V8 in my case) ?

Guillaume Menant


Daniel Jacobowitz a écrit :
> On Thu, Oct 11, 2007 at 02:41:17PM +0200, Guillaume MENANT wrote:
>   
>> I've found this page : 
>> http://sources.redhat.com/gdb/onlinedocs/gdb_33.html#SEC679
>> I still have some questions :
>> - We just have to handle commands from the page above to manage the GDB 
>> protocol (in TCP) ? The is no specific encapsulation ?
>>     
>
> The Overview at the top of that page describes the encapsulation.
>
>   
>> - How does Eclipse will know internal registers of my chip (registers like sp, 
>> pc,  ...) ? Using qXfer and a XML file ? Is it mandatory for a debugger to know 
>> internal registers ?
>>     
>
> The standard registers, like sp and pc, Eclipse will get the names
> directly from GDB.  It's only if you have extra board-specific or
> core-specific registers that you need to deal with XML descriptions.
>
>