Memory gaps in linker script output

I am using GHS MULTI to build an linker script. But there are some memory gaps that are causing checksum error when running the code. Can anyone suggest methods to fill the memory gaps in the liner script .ld file( I want solution that can be used in .ld file). I used =fill  and FILL()  after all the sections in my SECTIONS{} but of no use. Can u suggest some other methods.