I want to know which .s file the STM32 board uses to access the main function after booting.

[mong87suk]

I checked the micropython/ports/stm32/resethandler.s file and found that g_pfnVectors is not defined there. Upon further investigation, I found it defined in stm32lib/CMSIS/STM32F4xx/Source/Templates/gcc/startup_stm32f405xx.s.

Both .s files have a main function defined.

I checked the firmware.map file of the STM32 and found two main functions as shown below. Which main function is accessed first after booting?

main build-PYBV11/lib/stm32lib/CMSIS/STM32F4xx/Source/Templates/gcc/startup_stm32f405xx.o
stm32_main build-PYBV11/main.o