Re: [Crash-utility] arm64: "bt -f" output

Hi Takahiro, To address my concerns about your patch, I added a few additional changes and attached it to this email. The changes are: (1) Prevent the stack dump "below" the #0 level. Yes, the stack data region is contained within the incoming frame parameters, but it's ugly and we really don't care to see what's before the #0 crash_kexec and crash_save_cpu #0 frames. (2) Fill in the missing stack dump at the top of the process stack, up to, but not including the user-space exception frame. (3) Instead of showing the fp of 0 in the top-most frame's stack address, fill it in with the address of the user-space exception frame. Note that there is no dump of the stack containing the user-space exception frame, but the register dump itself should suffice. If you can live with the display, I'll clean up the patch, and maybe add the stack-layout diagram from your last post into a comment. It was quite helpful, especially in comparison to the x86_64 model, which is what I was mistakenly using as a guide. Thanks, Dave