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43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
// Copyright (c) 2022 Cesanta Software Limited
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// All rights reserved
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// Startup code
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__attribute__((naked, noreturn)) void _reset(void) {
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// Initialise memory
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extern long _sbss, _ebss, _sdata, _edata, _sidata;
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for (long *src = &_sbss; src < &_ebss; src++) *src = 0;
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for (long *src = &_sdata, *dst = &_sidata; src < &_edata;) *src++ = *dst++;
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// Call main()
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extern void main(void);
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main();
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for (;;) (void) 0;
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}
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void __attribute__((weak)) DefaultIRQHandler(void) {
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for (;;) (void) 0;
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}
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#define WEAK_ALIAS __attribute__((weak, alias("DefaultIRQHandler")))
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WEAK_ALIAS void NMI_Handler(void);
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WEAK_ALIAS void HardFault_Handler(void);
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WEAK_ALIAS void MemManage_Handler(void);
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WEAK_ALIAS void BusFault_Handler(void);
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WEAK_ALIAS void UsageFault_Handler(void);
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WEAK_ALIAS void SVC_Handler(void);
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WEAK_ALIAS void DebugMon_Handler(void);
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WEAK_ALIAS void PendSV_Handler(void);
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WEAK_ALIAS void SysTick_Handler(void);
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// IRQ table
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extern void _estack();
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__attribute__((section(".vectors"))) void (*tab[16 + 150])(void) = {
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// Cortex interrupts
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_estack, _reset, NMI_Handler, HardFault_Handler, MemManage_Handler,
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BusFault_Handler, UsageFault_Handler, 0, 0, 0, 0, SVC_Handler,
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DebugMon_Handler, 0, PendSV_Handler, SysTick_Handler,
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// Interrupts from peripherals
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DefaultIRQHandler};
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