Hardfault on STM32F746BGT6 startup, __libc_init_array

[N Sornakumar]

I'm trying to get a STM32Cube project compiled using arm-none-eabi-gcc and a Makefile. The FW builds without problems.but when I boot the MCU i get stuck in Hard Fault. Any ideas what could be wrong?

Reset_Handler:  
  ldr   sp, =_estack      /* set stack pointer */
 
/* Copy the data segment initializers from flash to SRAM */  
  ldr r0, =_sdata
  ldr r1, =_edata
  ldr r2, =_sidata
  movs r3, #0
  b LoopCopyDataInit
 
CopyDataInit:
  ldr r4, [r2, r3]
  str r4, [r0, r3]
  adds r3, r3, #4
 
LoopCopyDataInit:
  adds r4, r0, r3
  cmp r4, r1
  bcc CopyDataInit
  
/* Zero fill the bss segment. */
  ldr r2, =_sbss
  ldr r4, =_ebss
  movs r3, #0
  b LoopFillZerobss
 
FillZerobss:
  str  r3, [r2]
  adds r2, r2, #4
 
LoopFillZerobss:
  cmp r2, r4
  bcc FillZerobss
 
/* Call the clock system initialization function.*/
  bl  SystemInit   
/* Call static constructors */
    bl __libc_init_array

[TDK]

Examine the SCB registers for the reason behind the hard fault.

[Tesla DeLorean]

>>Any ideas what could be wrong?

Your constructors are touching memory that you haven't properly initialized in SystemInit() ?

ie External Memories (peripherals, pins, clocks, etc)

Are you using C++ ? If not then you probably don't need to be calling __libc_init_array

Look at the .MAP, check where the constructors are being placed, and the settings for those sections in the linker script (.LD)

[N Sornakumar · Accepted solution]

I am use stlink v3 mini debugger so i am got this error. After i am use stlink v2 debugger, program loaded successfully in my target board without any problem