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arch/arm/kernel/head.S77 ENTRY(stext)

arch/arm/kernel/traps.cdevicemaps_init	void * vectors = early_alloc(PAGE_SIZE * 2);	early_trap_init(vectors); 		vectors_base = vectors;		vectors_page = vectors;				// 填充 vectors - vectors+0x1000-1		vectors_base)[i] = 0xe7fddef1;		memcpy((void *)vectors, __vectors_start, __vectors_end - __vectors_start);				// 填充 vectors+0x1000 - vectors+0x2000-1		memcpy((void *)vectors + 0x1000, __stubs_start, __stubs_end - __stubs_start);				kuser_init(vectors_base);			int kuser_sz = __kuser_helper_end - __kuser_helper_start;						// 覆盖 vectors+0x1000-kuser_sz - vectors+0x1000-1			memcpy(vectors + 0x1000 - kuser_sz, __kuser_helper_start, kuser_sz);						// 覆盖 vectors+0xfe0 -  vectors+0xfe4-1			if (tls_emu || has_tls_reg) memcpy(vectors + 0xfe0, vectors + 0xfe8, 4);					flush_icache_range(vectors, vectors + PAGE_SIZE * 2);	...	map.pfn = __phys_to_pfn(virt_to_phys(vectors));	map.virtual = 0xffff0000;	map.length = PAGE_SIZE;	map.type = MT_HIGH_VECTORS;	create_mapping(&map);	map.pfn += 1;	map.virtual = 0xffff0000 + PAGE_SIZE;	map.length = PAGE_SIZE;	map.type = MT_LOW_VECTORS;	create_mapping(&map);

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