Software breakpoints with J-Link probe

[Christopher]

Hi,

I am not able to make software breakpoints working with a Segger J-Link probe.

As an exemple, here is my assert callback function:

void __attribute__((noreturn)) __assert_func(const char *file, int line, const char *func, const char *failedexpr) {
  asm volatile("bkpt");
  abort();
}

My program should be stopped automatically when entering any assert function. In general, I would like to stop the execution of my program using the asm volatile("bkpt") instruction.

Using an ST-Link v2 probe, the code above works. Unfortunately, it doesn't work with a Segger J-Link probe. Any experience with this ? Is any specific configuration require to make this working ?

Note: I use the latest available J-Link firmware "SEGGER J-Link Lite-Cortex-M V8.00" with SEGGER J-Link V5.12 software.

[Hung Bui]

@metch: yes, just tested, it worked for me here. Segger Jlink v5.10m, GNU ARM C/C++ J-Link Debugging 3.2.1.201604190915. I have to modified the code like this, so it compiles:

static inline void break_here(void)
   {
       __asm volatile(
           "bkpt #0x01\n\t"
           "mov pc, lr\n\t"
         );
   }