ESP32 Forum

Hi,

I wrote a lot of C++ classes using traditional C++. Now I'm studyng C++11, C++14 and so on. I would like to see if my efforts results in better machine code.

In AVR GCC one could generate an .lls file, a conbination of C++ statements with the corresponding assembler instructions.

Is this also possible with ESP32/ESP-IDF, and how can I do this?

Thanks,

Paul

Hi PaulVdBergh,

FWIW when using ESP32 with JTAG you can see (and navigate through) both the C code and machine code side by side.

Hi krzychb,

That is one option... But my experience with JTAG debugging on ESP32 devices is disappointing... When more threads are running in the debugger things get very obfuscated..

I rather would like to have listings of the generated assembly to compare the different compilations.

However, thanks for your suggestion.

Paul

One option is to start xtensa-esp32-elf-gdb <elf file> and then execute "disassemble /m <function name>".
You don't need to connect to the target to do this.

Thanks - That was very help full for the DSP stuff I am working on.
I have been using obj dump until now but this is much more lean.
/Jakobsen