debug command-execution stopped in USR mode

Hi,

what does the command mean

"wait
step
Execution stopped in USR mode"

 

I am using DS-5 Debug Eclipse Platform to debug .c file. 

my target is connected to ULINK Pro ,and the connections is ok. 

I toggled breakpoint to debug, and click "step source line" and "step source over line"  then in the commands, states 

wait
step
Execution stopped in USR mode at S:0x20049274 

when i click "continue" then the commands state, 

wait
continue
Execution stopped in USR mode at breakpoint 6: S:0x2004AA80
S:0x2004AA80 1041

1041 is the line number that i toggled breakpoint. 

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