23.3.4.14 .dbg_data Section

This section reserves space for the data required by the debug exception handler. This section is only allocated if the symbol _DEBUGGER has been defined. (This symbol is defined if the -mdebugger command line option is specified to the shell.) This section is assigned to the data memory region (kseg1_data_mem). The section is marked as NOLOAD as it is only intended to ensure that application data cannot be placed at locations reserved for the debug executive.

.dbg_data (NOLOAD) :
{
  . += (DEFINED (_DEBUGGER) ? 0x200 : 0x0);
} > kseg1_data_mem