- stack should remain properly aligned
- risc-v was actually completely broken for user defined handlers because GCC was auto-pushing vaargs for naked function even with no stack frame
- new implementation supports full call stacks in gdb for Arm or RISC-V when hitting breakpoint in panic function
- new config defines make it explicit that gdb full stgack trace comes at the cost of corrupting stack based vaargs 4th is corrupted on Arm, later on RiSC-V (7 maybe?)
