1、linux kernel - arch64的异常向量表-(irq,fiq,svc…)

armv8-arch64架构下，linux kernel的异常量表，再entry.S中:

/*
 * Exception vectors.
 */

	.align	11
ENTRY(vectors)
	kernel_ventry	1, sync_invalid			// Synchronous EL1t
	kernel_ventry	1, irq_invalid			// IRQ EL1t
	kernel_ventry	1, fiq_invalid			// FIQ EL1t
	kernel_ventry	1, error_invalid		// Error EL1t

	kernel_ventry	1, sync				// Synchronous EL1h
	kernel_ventry	1, irq				// IRQ EL1h
	kernel_ventry	1, fiq_invalid			// FIQ EL1h
	kernel_ventry	1, error_invalid		// Error EL1h

	kernel_ventry	0, sync				// Synchronous 64-bit EL0
	kernel_ventry	0, irq				// IRQ 64-bit EL0
	kernel_ventry	0, fiq_invalid			// FIQ 64-bit EL0
	kernel_ventry	0, error_invalid		// Error 64-bit EL0

#ifdef CONFIG_COMPAT
	kernel_ventry	0, sync_compat, 32		// Synchronous 32-bit EL0
	kernel_ventry	0, irq_compat, 32		// IRQ 32-bit EL0
	kernel_ventry	0, fiq_invalid_compat, 32	// FIQ 32-bit EL0
	kernel_ventry	0, error_invalid_compat, 32	// Error 32-bit EL0
#else
	kernel_ventry	0, sync_invalid, 32		// Synchronous 32-bit EL0
	kernel_ventry	0, irq_invalid, 32		// IRQ 32-bit EL0
	kernel_ventry	0, fiq_invalid, 32		// FIQ 32-bit EL0
	kernel_ventry	0, error_invalid, 32		// Error 32-bit EL0
#endif
END(vectors)

我们这里讲解如下四行:

kernel_ventry	1, irq				// IRQ EL1h
kernel_ventry	0, irq				// IRQ 64-bit EL0
kernel_ventry	1, sync				// Synchronous EL1h
kernel_ventry	0, sync				// Synchronous 64-bit EL0

kernel_ventry是宏，翻译后的函数名分别是：
el1_irq
el0_riq
el1_sync
el0_sync
对应的函数入口我们就找到了，也就是说，当触发irq异常、或svc异常时会跳转到这几个函数中。

2、linux kernel - arch的异常向量表-(irq,fiq,swi…)

在arch架构下，linux kernel的同步异常向量表__stubs_start 和 异步异常向量表__vectors_start，在entry-armv.S中:

	.section .stubs, "ax", %progbits
__stubs_start:
	@ This must be the first word
	.word	vector_swi

	.section .vectors, "ax", %progbits
__vectors_start:
	W(b)	vector_rst
	W(b)	vector_und
	W(ldr)	pc, __vectors_start + 0x1000
	W(b)	vector_pabt
	W(b)	vector_dabt
	W(b)	vector_addrexcptn
	W(b)	vector_irq
	W(b)	vector_fiq