[lldb-dev] LLDB for bare-iron targets lacking support for qC /qfThreadInfo packet

Greg Clayton via lldb-dev lldb-dev at lists.llvm.org
Fri Aug 21 09:12:31 PDT 2015

One option is to send a ? packet to get a stop reply packet back. The stop reply should contain a "thread:XXXX;" key/value pair and you could just make the pid == tid == XXXX. We currently try these in the order below:

1 - qProcessInfo 
2 - qC
3 - qfThreadInfo

Now we could add a fourth:

4 - ?

> On Aug 21, 2015, at 12:23 AM, Jaydeep Patil <jaydeep.patil at imgtec.com> wrote:
> Hi,
> The gdb-stub running on a MIPS bare-iron board lacks support for qC /qfThreadInfo packet.  Once the LLDB is connected to the target it cannot proceed further as there is no process and/or thread information available from the target. However GDB is able to debug the application as it ignores the output of qC /qfThreadInfo packet if they are not supported. GDB assumes that a process/thread X is available for debugging.
> Is there any way in LLDB to support such bare-iron targets where qC /qfThreadInfo packets are not supported?
> Regards,
> Jaydeep

More information about the lldb-dev mailing list