mongoose/examples/stm32/nucleo-h743zi-baremetal/startup.c

// Copyright (c) 2022 Cesanta Software Limited
// All rights reserved

// Startup code
__attribute__((naked, noreturn)) void _reset(void) {
  // Initialise memory
  extern long _sbss, _ebss, _sdata, _edata, _sidata;
  for (long *src = &_sbss; src < &_ebss; src++) *src = 0;
  for (long *src = &_sdata, *dst = &_sidata; src < &_edata;) *src++ = *dst++;

  // Call main()
  extern void main(void);
  main();
  for (;;) (void) 0;
}

void __attribute__((weak)) DefaultIRQHandler(void) {
  for (;;) (void) 0;
}

#define WEAK_ALIAS __attribute__((weak, alias("DefaultIRQHandler")))

WEAK_ALIAS void NMI_Handler(void);
WEAK_ALIAS void HardFault_Handler(void);
WEAK_ALIAS void MemManage_Handler(void);
WEAK_ALIAS void BusFault_Handler(void);
WEAK_ALIAS void UsageFault_Handler(void);
WEAK_ALIAS void SVC_Handler(void);
WEAK_ALIAS void DebugMon_Handler(void);
WEAK_ALIAS void PendSV_Handler(void);
WEAK_ALIAS void SysTick_Handler(void);

// IRQ table
extern void _estack();
__attribute__((section(".vectors"))) void (*tab[16 + 150])(void) = {
    // Cortex interrupts
    _estack, _reset, NMI_Handler, HardFault_Handler, MemManage_Handler,
    BusFault_Handler, UsageFault_Handler, 0, 0, 0, 0, SVC_Handler,
    DebugMon_Handler, 0, PendSV_Handler, SysTick_Handler,

    // Interrupts from peripherals
    DefaultIRQHandler};