On Sun, 2005-08-28 at 15:23 -0500, fdl@xxxxxxxxxx wrote: > Hello, > > I am trying to add my own interrupt handler to FC3. I have tried two methods > of modifying the IDT, both of which work under most kernels I've tried (incl > the 2.6.9 vanilla kernel) but fail under the FC3 kernel (2.6.9-1.667). I've > also tried the FC3 kernel with the alternate security models off, and large > memory support off, but I have the same problem. Although I haven't tried it > yet personally, I've been told that some code I have working on the vanilla > 2.6.9 kernel works fine under FC4. > > Method 1 is to just modify the IDT in place. This causes a segfault on FC3. > > Method 2 is to make a copy of the IDT, modify the copy, and then use lidt to > change the IDT used by the processor to the copy. This causes an immediate > reboot on FC3. > > Any pointers on what I might be doing wrong? What is the "correct" or > "officially supported" way of adding an interrupt handler on FC3? the only way that'll work is to just use request_irq() in your kernel module. Anything else is such a gross hack that it won't ever work reliable. (for example, IDT's may well be per cpu, or read only memory)
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