Hi All,

 I am trying to single step some code in a MIPS embedded
target flash memory
using GDB 6.8 and our own GDB Server for MIPS target. I am
doing below steps

1) Start GDB server which connects to the MIPS target
through a JTAG
debugger probe and breaks the target at reset vector
(0xBFC00000)
2) Start gdb and connect to GDB server. Gdb now connects to
the target and
shows $pc as 0xBFC00000
3) Issue stepi command. But gdb never gets back control
since GDB server
fails to set breakpoint on ROM.

   When I repeat the same step using the sde-gdb provided by
www.mips.com I
am able to do the step operation successfully. 

   I checked the difference between these two and fond out
that the issue is
caused by the difference in the way sde-gdb and gdb 6.8 does
step operation.
SDE GDB issues step(s) command to GDB server where as gdb
6.8 tries to set
breakpoint on next line and issue continue(c) command. Any
idea on why the
two gdb variants behave differently for step operation using
same GDB
server? How gdb decides what mechanism to be used for
stepping operation? 

Thanks,
Jiju George