Special section and output file

[Paul Burke]

I've added a section to the linker script, a chunk of RAM separated for
my own nefarious purposes. All well and good, I can allocate objects in
it etc.

But when the hex file is created, it contains a load record for this
section, all zeroes. Bummer, it means that the JTAG load verify fails
which is a pest. Everything runs OK, but it's an annoyance as I now
can't tell if there's an error in the real bit.

So the question is, how do I suppress hex record production in the
linker script?

Paul Burke

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[Sergey A. Borshch]

Paul Burke wrote:
> But when the hex file is created, it contains a load record for this
> section, all zeroes.

I know three methods:
1) Add NOLOAD flag to your section in linker script:
   .driver_data (NOLOAD) :
   {
     *(rf_tx_buffer) ;    /* reserved for TxBuffer */
     KEEP (*(rf_tx_buffer))
   } > data

But some ld builds (at least in some WinAVR versions) ignore this flag.
Fortunely, second method works always:

2) exclude your new section when msp430-objcopy creates .hex:
        $(OBJCOPY) -O ihex -j .driver_data  $< $@

3) Add your new section to .bss output section

   Sergey.

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[Sergey A. Borshch]

Sergey A. Borshch wrote:

> 2) exclude your new section when msp430-objcopy creates .hex:
> $(OBJCOPY) -O ihex -j .driver_data  $< $@

Sorry, $(OBJCOPY) -O ihex -R .driver_data  $< $@

Sergey.

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