[bug #59427] Pending external interrupts can not be cleared

[anonymous]

URL:
  <https://savannah.nongnu.org/bugs/?59427>

                 Summary: Pending external interrupts can not be cleared
                 Project: Simulavr: an AVR simulator
            Submitted by: None
            Submitted on: Sat 07 Nov 2020 11:30:24 AM UTC
                Category: Simulation
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: timolang@gmail.com
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: simulavr

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Details:

I observed that clearing pending external interrupts has no effect. For
instance, clearing the PCIE bit (by writing a 0 bit) inside of GIMSK or
clearing the PCIF bit (by writing a 1 bit) inside of GIFR, does not prevent
the interrupt handler to be run.

Looking at the simulavr source code it seems like a Problem inside of
libsim/externalirq.cpp in the function ExternalIRQHandler::set_from_reg. The
function does not call ClearIrqFlag which would be required to clear any
pending interrupts...




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