[Gdb] GDB/SIM

[Devaughn, Hans]

I am running the GNU toolset. My target procesor is MIPS. I am invoking the simulator from gdb. The problem is that the image that is read in only creates memory regions for the text and data section. I am using VxWorks and VxWorks uses the space between the end of data and an address I have specified for the heap. If I try to run and VxWorks references that memory I get a fault.

My question/problem is that I am trying to use the following command to create the meory region for this space

Sim memory-region $start,$area

The command is not accepted by sim. Howerver, if I print out $start and $area the command is accepted and works correctly.

The variable $start is the first location after the end of data. I have created this variable as follows

Set variable $start=_end

The variable $area=0x80400000-$start

Could someone shed light on my problem or is there a limitation on passing variable data from gdb to sim?

Thanks for your help in advance.

Hans DeVaughn