What happens before main() in Linux vs Windows vs RTOS capable microcontroller(say STM32x)?

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  • gcc

    As /u/EETrainee mentioned, it can be called crt*. In the GCC source tree, you'll find these in the target architecture's subdirectory below: https://github.com/gcc-mirror/gcc/tree/master/libgcc/config. The interesting files are called crti.S, crtn.S or crt0.c.

  • STM32-Repo

    Enterprise Firmware platform development

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