Sebastian Huber ff6d3df84a bsps/mips: Add the exception handler registration ...

The exception codes occupied the interrupt vectors below
MIPS_INTERRUPT_BASE.  A handler reached them through
rtems_interrupt_handler_install(), which passes a vector number and no
frame.  mips_vector_exceptions() therefore stored the frame in the
global mips_exception_frame around the dispatch, and
bsp_interrupt_handler_default() read it back.  That global is a hidden
argument of the dispatch.  Two processors which take an exception at
the same time overwrite it, so the port cannot support SMP in that
form.

Give the port its own registration.  mips_exc_set_handler() installs
the handler of one exception code and the handler takes a
CPU_Exception_frame pointer.  ppc_exc_set_handler() of the PowerPC
port is the model.  The default handler calls rtems_fatal() with
RTEMS_FATAL_SOURCE_EXCEPTION and the frame.
bsp_interrupt_is_valid_vector() rejects every vector below
MIPS_INTERRUPT_BASE, so the interrupt manager owns none of them.

An application which installed a handler on an exception vector with
rtems_interrupt_handler_install() moves to the new call.

MIPS_INTERRUPT_BASE keeps its value.  No BSP renumbers its interrupt
vectors.

Update #5752.

Assisted-by: Claude:claude-opus-5 claude-code
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>

2026-09-21 20:02:55 -05:00

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bsps

bsps/mips: Add the exception handler registration

2026-09-21 20:02:55 -05:00

cpukit

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testsuites

build: Fix copyright statement format

2026-09-17 10:00:43 -05:00

grp.yml

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