Bootloader Jump Routine

Hard C Architecture

Write a C routine to jump from application firmware to bootloader safely on Cortex-M. It must disable interrupts, deinit peripherals, set MSP to bootloader stack address, and branch to reset handler.

Constraints

Bootloader address provided as argument.
Extract MSP and reset vector.
Use function pointer.
__disable_irq() before jump.
Should never return.
Clear pending interrupts.

Starter codeC

1#include <stdint.h>2void jump_to_bl(uint32_t addr);