MSI-X tries to access an invalid VirtAddr

[kennystrawnmusic]

Have been doing a lot of research attempting to get MSI-X implemented in my kernel (as a prerequisite for both XHCI and NVMe) and got pretty far — ah, but not far enough. I have lines 903-909 of my PCI driver commented out because for whatever reason, as soon as I attempt to allocate an IRQ to handle the message, I get a VirtAddrNotValid panic with an attempted access of address 0x10000710d380ca:

// snip
                    // Has tendency to attempt to access invalid address 0x10000710d380ca which overflows bit 48
                    // Placing the physical memory offset at a low fixed address has no effect
                    // for entry in _msg_table {
                    //     let irq = irqalloc();
                    //     entry.route_irq(irq, IrqMode::Fixed);
                    //     IDT.write()[irq as usize].set_handler_fn(msi_x);
                    // }
// snip

The code in question can be found here — any insight as to why it's doing this would be appreciated. And no, attempting to identity-map all pages and/or set the physical memory offset as low as possible had absolutely no effect.

[kennystrawnmusic]

Update: solved my own problem. Turns out it was with my BIR parser