excp_handler() called context::current() unconditionally, which panics
with 'not inside of context' when no context exists yet (before
context::init() runs in kmain/kmain_ap). On bare metal, a page fault
during BSP's start() — e.g. ACPI table access or device MMIO — caused
page_fault_handler() to return Err, falling through to excp_handler(),
which then panicked at context::current() instead of reporting the
actual fault.
Replace context::current() with context::try_current(). When None,
log the exception details (kind, code, faulting address) and panic
with a descriptive message. This turns an uninformative cascading
panic into a diagnostic one that reveals the real faulting address.
vasilito
573b3e6eae