Error L6915E use_no_semihosting and sys_exit

When retargeting I use this :

//******************************************************************************

#include <rt_misc.h>

#pragma import(__use_no_semihosting_swi)

struct __FILE { int handle; /* Add whatever you need here */ };
FILE __stdout;
FILE __stdin;

int fputc(int ch, FILE *f)
{
  ITM_SendChar(ch);

  return(ch);
}

int fgetc(FILE *f)
{
  char ch;

  ch = 1;

  return((int)ch);
}

int ferror(FILE *f)
{
  /* Your implementation of ferror */
  return EOF;
}

void _ttywrch(int ch)
{
  ITM_SendChar(ch);
}

void _sys_exit(int return_code)
{
label:  goto label;  /* endless loop */
}

//******************************************************************************

When retargeting I use this :

//******************************************************************************

#include <rt_misc.h>

#pragma import(__use_no_semihosting_swi)

struct __FILE { int handle; /* Add whatever you need here */ };
FILE __stdout;
FILE __stdin;

int fputc(int ch, FILE *f)
{
  ITM_SendChar(ch);

  return(ch);
}

int fgetc(FILE *f)
{
  char ch;

  ch = 1;

  return((int)ch);
}

int ferror(FILE *f)
{
  /* Your implementation of ferror */
  return EOF;
}

void _ttywrch(int ch)
{
  ITM_SendChar(ch);
}

void _sys_exit(int return_code)
{
label:  goto label;  /* endless loop */
}

//******************************************************************************

Thank you! Working fine now after including

struct __FILE { int handle; /* Add whatever you need here */ };
FILE __stdout;
FILE __stdin;

and

void _sys_exit(int return_code)
{
label:  goto label;  /* endless loop */
}

Just for interest, what's this _sys_exit function for, and why dindn't I need it with the M0?

Cheers

Didn't you use assert? Assert is expected to abort the run if it detects a failure.

Yes I do, but isn't the assert_failed function used for this?

The linker clearly thinks it's being used, perhaps you can mouse over and see where it's referenced, or search through the project files. Or it could be pulled in related to some other library/stdio function you are using.

Hi,  Westonsupermare Pier.

I've been having some problem when I try to use printf on this configuration. Everything goes OK, compile and linker part, but when I run debug I've got a HardFault Exception. It happens at the exact moment when it tries to call the printf function. Do you have any idea what it is? 

Look in the disassembly view at exactly what is faulting. Review the code in the context of the registers.

If it is a BKPT instruction, then it is linking in the wrong code.

Is the stack adequate for the printf() to function? It is faulting on a memory access, or and instruction issue?