I have bootloader code that uses the first and last few sectors of flash
on an LPC2xxx.

In the startup assembly file the vectors & protection code word load at
0x0, then there is an .org 0x7b000 statement that puts the program code
up high.  There is no specific "fill" command.

When I go to debug and the program loads to flash, all the sectors in
the middle get erased and filled with 0.  I don't want that because it
erases the "main" code that I have previously loaded.

Is there a way to tell the system to ignore the unused area?  Right now
it thinks that the startup section includes all the empty space, rather
than only the first 0x200 bytes.

I essentially need to define a "noload" section between 0x1000 and
0x7b000 so that it will leave those sectors alone.  Is this possible???

(Using gcc & openocd)

Ah, was looking in the wrong place.  I just edited the linker script to
remove the memory I didn't want touched:

MEMORY
{
  flash1   (rx) : ORIGIN = 0x00000000, LENGTH = 4K
  /* Sectors 1 - 24 reserved for main program code */
  flash2   (rx) : ORIGIN = 0x0007B000, LENGTH = 12K
  ram      (rw) : ORIGIN = 0x40000000, LENGTH = 30720
  usbram   (rw) : ORIGIN = 0x7FD00000, LENGTH = 8K
  ethram   (rw) : ORIGIN = 0x7FE00000, LENGTH = 16K
}

Vectors and reset handler go in flash1, everything else goes up in
flash2.