在过去的几天里，我试图在C中实现一个简单的中断处理程序。到目前为止，我认为我已经完成了我的初始任务。我的最终目标是通过位翻转一些CPU寄存器来在内核中注入一些错误。在阅读this，this和this后，我选择了IRQ编号10，因为它似乎是一个免费的“开放中断”。我的疑问是：我怎么知道这是否是调用我的中断处理程序的“最佳”IRQ？我怎么可能决定这个？
谢谢，一切顺利， 若昂
P.S。：据我所知，有16条IRQ线，但Linux有256条IDT条目，如/include/asm/irq_vectors.h中所述（请参见下文）。这似乎也令我感到困惑。
/*
* Linux IRQ vector layout.
*
* There are 256 IDT entries (per CPU - each entry is 8 bytes) which can
* be defined by Linux. They are used as a jump table by the CPU when a
* given vector is triggered - by a CPU-external, CPU-internal or
* software-triggered event.
*
* Linux sets the kernel code address each entry jumps to early during
* bootup, and never changes them. This is the general layout of the
* IDT entries:
*
* Vectors 0 ... 31 : system traps and exceptions - hardcoded events
* Vectors 32 ... 127 : device interrupts
* Vector 128 : legacy int80 syscall interface
* Vectors 129 ... 237 : device interrupts
* Vectors 238 ... 255 : special interrupts
*
* 64-bit x86 has per CPU IDT tables, 32-bit has one shared IDT table.
*
* This file enumerates the exact layout of them:
*/