[sdcc-devel] [ sdcc-Feature Requests-853893 ] CRC output from linker

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Feature Requests item #853893, was opened at 2003-12-04 09:12
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Category: None
Group: None
Status: Open
Priority: 5
Submitted By: Maarten Brock (maartenbrock)
Assigned to: Nobody/Anonymous (nobody)
Summary: CRC output from linker

Initial Comment:
Hello,

I would like to see the option added to the linker to be 
able to have it compute a CRC on the produced code 
and insert that into the output code as well. This way a 
program can sanity check itself before startup. This way 
one could also decide (based on an educated guess) not 
to download code to a target, because it wasn't 
changed, which saves development time. 

To implement this, I think the following are required:
1) Generate a symbol for the CRC
2) Select an area to compute the CRC over
3) Fill unused bytes in the area with a default value (FF)
4) Compute the CRC (8/16/32)
5) Store the CRC outside this area.

Keep up the good work, hope this helps improving SDCC 
further and further.

Maarten

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