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I am trying to automate something in gdb: I want to call monitor rtt setup <addr> <size> with the appropriate values from the _SEGGER_RTT symbol. This works when I do it manually, but I would like to add it to my .gdbinit script. I can do this:

(gdb) set $rtt_offset=&_SEGGER_RTT
(gdb) set $rtt_size=sizeof _SEGGER_RTT
(gdb) print $rtt_offset 
$3 = (SEGGER_RTT_CB *) 0x20000410 <_SEGGER_RTT>

but if I try to call this, it fails

(gdb) mon rtt setup $rtt_offset $rtt_size "SEGGER RTT"

How do I expand these variables in the call to monitor?

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    Try eval, like eval "mon rtt setup %p %u \"SEGGER RTT\"",$rtt_offset,$rtt_size. Commented Jul 3 at 15:07
  • Worked perfectly, thanks :) Commented Jul 8 at 9:51
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