The map file produced by the GNU linker includes lots of information, however it is very cryptic to read. In “Listing Code and Data Size for each Source File with GNU and Eclipse” I showed how the GNU size utility can be used to report the code and data size for each object file. The Eclipse based MCUXpresso IDE comes with another nice view which shows detailed information about code and data allocation:
Symbol Viewer in MCUXpresso IDE
One way to use that view is to use the context menu on the .elf/.axf file:
View Symbols
Using it on the linked binary shows all the variables (symbols) allocated in it, and I can sort the names/addresses/etc.
I can use it on an archive/library file or single object file too:
Symbols of object file
You can generate that kind of information using the ‘nm’ command, e.g.
arm-none-eabi-nm -S --size-sort -s MyBinary.axf
nm command line output
💡 Alternatively, have a look at the ‘Map File Browser’: http://www.sikorskiy.net/prj/amap/
Happy Sizing 🙂
Links
- Listing Code and Data Size for each Source File with GNU and Eclipse
- MCUXpresso IDE: http://www.nxp.com/mcuxpresso/ide
- GNU nm command: https://sourceware.org/binutils/docs/binutils/nm.html
- Map File Browser: http://www.sikorskiy.net/prj/amap/
MCU on Eclipse 
I recommend Map File Browser
http://www.sikorskiy.net/prj/amap/
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Oh, that’s indeed a nice one! Thanks for sharing.
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Cool little feature Erich. I had been using a GUI app from here for the same purpose:
https://github.com/govind-mukundan/MapViewer
Seems like everyone has their own favourite !! 🙂
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Oh, yet another one! Nice! 🙂
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mmh it does not seems available for eclipse Neon CDT 😦
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No, the view is not part of Neon (unfortunately). It is part of the NXP MCUXpresso IDE. But the same information can be retrieved using the GNU nm command too.
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Thanks and its quite useful!
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