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fix a bug, should be: Virtual Address=Physical Address+0xC0000000

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chyyuu 2014-10-25 20:15:34 +08:00
parent 5346cc9003
commit 89d28c7ba1
13 changed files with 24 additions and 24 deletions
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lab2/lab2_3_3_5_3_setup_paging_map.md
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@ -41,7 +41,7 @@ Virtual Address= Linear Address
改为
Virtual Address=Linear Address-0xC0000000
Virtual Address=Linear Address + 0xC0000000
由于gcc编译出的虚拟起始地址从0xC0100000开始，ucore被bootloader放置在从物理地址0x100000处开始的物理内存中。所以当kern\_entry函数完成新的段映射关系后，且ucore在没有建立好页映射机制前，CPU按照ucore中的虚拟地址执行，能够被分段机制映射到正确的物理地址上，确保ucore运行正确。