[Crash-utility] [PATCH] ppc64: fix bt for secondary threads for NMI IPIs

[Dave Anderson]

----- Original Message -----
> With latest NMI IPI changes, crash_ipi_callback is found multiple times
> on the stack. Ensure the chosen symbol relates to an actual backtrace.

Looks good -- queued for crash-7.2.1:

  https://github.com/crash-utility/crash/commit/ed2abb47be9846be7a47d769c420ee3992cc0196

Thanks,
  Dave
 

> Signed-off-by: Hari Bathini <hbathini at linux.vnet.ibm.com>
> ---
>  ppc64.c |    8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/ppc64.c b/ppc64.c
> index 672ee60..0b04187 100644
> --- a/ppc64.c
> +++ b/ppc64.c
> @@ -2337,6 +2337,14 @@ retry:
>                          *nip = *up;
>                          *ksp = bt->stackbase +
>  				((char *)(up) - 16 - bt->stackbuf);
> +			/*
> +			 * Check whether this symbol relates to a
> +			 * backtrace or not
> +			 */
> +			ur_ksp =  *(ulong *)&bt->stackbuf[(*ksp) - bt->stackbase];
> +			if (!INSTACK(ur_ksp, bt))
> +				continue;
> +
>                          return TRUE;
>                  }
>  	}
> 
>