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(gdb) mon rtt stop
(gdb) mon rtt setup 0x1fffd000 0x2000
(gdb) mon rtt start
rtt: Searching for control block 'SEGGER RTT'
KARL: addr: 0x1fffd000 match for buf_off: 929 char == 'S
KARL: addr: 0x1fffdc00 match for buf_off: 921 char == 'S
KARL: addr: 0x1fffdc00 match for buf_off: 933 char == 'S
KARL: addr: 0x1fffdc00 match for buf_off: 944 char == 'S
KARL: addr: 0x1fffe400 match for buf_off: 108 char == 'S
KARL: addr: 0x1fffe400 match for buf_off: 109 char == 'E
KARL: addr: 0x1fffe400 match for buf_off: 110 char == 'G
KARL: addr: 0x1fffe400 match for buf_off: 111 char == 'G
KARL: addr: 0x1fffe400 match for buf_off: 112 char == 'E
KARL: addr: 0x1fffe400 match for buf_off: 113 char == 'R
KARL: addr: 0x1fffe400 match for buf_off: 114 char == ' 
KARL: addr: 0x1fffe400 match for buf_off: 115 char == 'R
KARL: addr: 0x1fffe400 match for buf_off: 116 char == 'T
KARL: addr: 0x1fffe400 match for buf_off: 117 char == 'T
KARL: found a match at 0x1fffe400 with bufoff 117 and id_length: 10
rtt: Control block found at 0x1fffe46c
(gdb) mon rtt stop
(gdb) mon rtt setup 0x1fffd100 0x2000
(gdb) mon rtt start
rtt: Searching for control block 'SEGGER RTT'
KARL: addr: 0x1fffd100 match for buf_off: 673 char == 'S
KARL: addr: 0x1fffdd00 match for buf_off: 661 char == 'S
KARL: addr: 0x1fffdd00 match for buf_off: 673 char == 'S
KARL: addr: 0x1fffdd00 match for buf_off: 684 char == 'S
KARL: addr: 0x1fffe100 match for buf_off: 880 char == 'S
KARL: addr: 0x1fffe100 match for buf_off: 881 char == 'E
KARL: addr: 0x1fffe100 match for buf_off: 882 char == 'G
KARL: addr: 0x1fffe100 match for buf_off: 883 char == 'G
KARL: addr: 0x1fffe100 match for buf_off: 884 char == 'E
KARL: addr: 0x1fffe100 match for buf_off: 885 char == 'R
KARL: addr: 0x1fffe100 match for buf_off: 886 char == ' 
KARL: addr: 0x1fffe100 match for buf_off: 887 char == 'R
KARL: addr: 0x1fffe100 match for buf_off: 888 char == 'T
KARL: addr: 0x1fffe100 match for buf_off: 889 char == 'T
KARL: found a match at 0x1fffe100 with bufoff 889 and id_length: 10
rtt: Control block found at 0x1fffe470
(gdb) p /x 0x1fffe100 + 889 + 1 -10
$14 = 0x1fffe470
(gdb) p /x 0x1fffe400 + 117 +1 -10
$15 = 0x1fffe46c
(gdb)