Linux Source Learning (4) 2013-2-27

Head.s

Head.s is linked to the system module with other kernel programs after the target file is generated, and is located at the very beginning of the system module, so it is called head

Head.s process

1. Reset interrupt descriptor and Global descriptor descriptor

2. Detect if 20 or more addresses are available. By comparing the contents of the 1M address above and the 0 start content is consistent

3. Determine if there is a digital coprocessor and write the results to the CR0 register

4. Turn on the paging mechanism. Set the 31st bit of CR0

Collected in 2013-02-27 from the Baidu space article has a problem? Click here to give us feedback

Linux Source Learning (4) 2013-2-27