Unix signal are an OS try at giving user a portable abstraction for software interrupts (HW Int & trap). It confusingly employs much of the jargon (masking, pri

Unix signal are an OS try at giving user a portable abstraction for software interrupts (HW Int & trap). It confusingly employs much of the jargon (masking, priorities, bottom halves...) http://stackoverflow.com/questions/13341870/signals-and-interrupts-a-comparison http://stackoverflow.com/questions/13341870/signals-and-inte... I have the intuition knowing the HW/ASM & the code but ignoring how POSIX works (I read stevens, but I am not having all my answers) that unices reimplement in SW what the HW does with wires. Maybe this could be fixable at the HW level? (and maybe I guess requiring kernel privileges)?