[fpc-pascal] Calling unassigned procedure gives no stack trace with -gl

[Peter Vreman]

>> > The point is that there is no stack trace with line numbers on the
>> > (obviously correct) exception, in spite of the option -gl (even when
>> > explicitly using SysUtils).
>>
>> The problem is that the framepointer register EBP is 0 in the
>> sigcontext.
>> We can't solve this.
>
> So, where should a solution come from?  Where in the software/hardware
> chain would a change be needed to make it work properly?

Maybe somewhere in the signalhandler in the kernel.