42bde7e9fa
elansc(4). elanpex(4) is for PCI exception reporting. I've already found some kernel bugs by reading the exceptions reported. Beware that it will spam the console a lot while the kernel and pcictl(8) probe non-existing addresses in PCI configuration space. elanpar(4) protects the kernel text from writes by the CPU and by PCI bus masters. As you might guess, this is not compatible with setting breakpoints using a debugger; detach the device using 'drvctl -d elanpar0' before you try to set breakpoints. In the future, I hope to extend elanpar(4) to provide general-purpose RAM write-protection.