path: root/c/src/lib/libbsp/m68k/mcf5235/gdb-init

#
# Connect to the target.
# 
target remote | m68k-bdm-gdbserver pipe /dev/bdmcf0

#
# The console loop in the Axman dbug monitor. Found by trial and error
# with the debugger.
#
thb *0xffe254c0

#
# Show the exception stack frame.
#
define show-exception-sframe
 set $frsr = *(unsigned short *)((unsigned long)$sp + 2)
 set $frpc = *(unsigned long *)((unsigned long)$sp + 4)
 set $frfvo = *(unsigned short *)((unsigned long)$sp + 0)
 set $frcode = $frfvo >> 12
 set $frvect = ($frfvo & 0xFFF) >> 2
 set $frstatus = ((($frfvo >> 10) & 3) << 2) | ($frfvo & 3)
 printf "EXCEPTION -- SR:0x%X  PC:0x%X  FRAME:0x%x  VECTOR:%d  STATUS:%d\n", $frsr, $frpc, $frcode, $frvect, $frstatus
 if $frstatus == 4
  printf " Fault Type: Error on instruction fetch"
 end
 if $frstatus == 8
  printf " Fault Type: Error on operand write"
 end
 if $frstatus == 12
  printf " Fault Type: Error on operand read"
 end
 if $frstatus == 9
  printf " Fault Type: Attempted write to write-protected space"
 end
end

#
# Run to initialise the RAM. The target will stop when the
# breakpoint is hit. Load the program.
#
c
load

#
# Break on an exception.
#
b _uhoh

#
# Travel to main then stop.
#
tb main
c