After some research I found that OpenOCD can't send current thread
value. It's GDB that ask for it, and only one time !
We have to change something in GDB, so I opened a bug report in bugzilla
: http://sourceware.org/bugzilla/show_bug.cgi?id=15643
If someone can help don't hesitate to use bugzilla ;)
On 17/06/2013 12:32, Vivien Giraud wrote:
> The problem is that GDB ask for current thread id before OpenOCD
> compute it.
> If we block it GDB won't let you connect to OpenOCD, IMO we have to
> let it like that and try to change the current thread when we upload
> .elf file.
>
> Vivien
>
> On 17/06/2013 10:45, Vivien Giraud wrote:
>> Hi everyone,
>>
>> I found where all my problem come from !
>> Each time I want to print the thread list in GDB I'v got a error
>> because openOCD try to read at 0x0.
>> After lots of reading and observations I found that GDB allways say
>> that the last thread is the current one (using '*').
>> So, using traces, I found that OpenOCD send the 'current thread'
>> command before knowing wich one is it, so it send 0 as current thread.
>>
>> *rtos.c:rtos_thread_packet*
>>
>> / else if (strstr(packet, "qC")) {//
>> // if (target->rtos != NULL) {//
>> // char buffer[15];//
>> // int size;//
>> // size = snprintf(buffer, 15, "QC%08X",
>> (int)target->rtos->current_thread);/
>>
>> This send 'QC00000000X' to GDB, saying that current is 0 on 1 to X
>> listed threads.
>>
>> And after it do :
>>
>> *eCos.c:eCos_update_threads*
>>
>> / /* read the current thread id *///
>> // uint32_t current_thread_addr;//
>> // retval = target_read_buffer(rtos->target,//
>> // rtos->symbols[eCos_VAL_current_thread_ptr].address,//
>> // 4,//
>> // (uint8_t *)¤t_thread_addr);/
>>
>> Is there any reason why we do this in disorder ?
>> If I hardcode 'QC00000002' for example, it works well (if current
>> thread is 2 of course).
>>
>> It seems to be the same problem Freddie meet here:
>> http://www.mail-archive.com/[email protected]/msg01549.html
>> Look it's saying current htread is the last one ! and after he can't
>> do anything.
>>
>> Hope, this time, it will help !
>>
>> PS: I'm currently working on it trying to making a patch but I want
>> to be sure that there is no special reason that it is in this disorder.
>>
>> Vivien
------------------------------------------------------------------------------
This SF.net email is sponsored by Windows:
Build for Windows Store.
http://p.sf.net/sfu/windows-dev2dev
_______________________________________________
OpenOCD-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/openocd-devel
