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In the following expression, we add the value of phys_base to the

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rax register, not the address of phys_base.
addq    phys_base(%rip), %rax

BTW, the value of phys_base =
the actual loaded physical address of kernel after relocation - the
likned physical address of kernel.

Signed-off-by: Firo Yang <firogh@gmail.com>
This commit is contained in:
Firo Yang 2017-11-29 16:21:45 +08:00
parent abf4f684a5
commit 723b07605c
2 changed files with 2 additions and 1 deletions
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2
Initialization/linux-initialization-1.md
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@ -270,7 +270,7 @@ That's all for now. Our early paging is prepared and we just need to finish last
Last preparation before jump at the kernel entry point Last preparation before jump at the kernel entry point
-------------------------------------------------------------------------------- --------------------------------------------------------------------------------
After that we jump to the label `1` we enable `PAE`, `PGE` (Paging Global Extension) and put the physical address of the `phys_base` (see above) to the `rax` register and fill `cr3` register with it: After that we jump to the label `1` we enable `PAE`, `PGE` (Paging Global Extension) and put the content of the `phys_base` (see above) to the `rax` register and fill `cr3` register with it:
```assembly ```assembly
1: 1:

1
contributors.md
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@ -111,3 +111,4 @@ Thank you to all contributors:
* [Cornelius Diekmann](https://github.com/diekmann) * [Cornelius Diekmann](https://github.com/diekmann)
* [Andrés Rojas](https://github.com/c0r3dump3d) * [Andrés Rojas](https://github.com/c0r3dump3d)
* [Beomsu Kim](https://github.com/0xF0D0) * [Beomsu Kim](https://github.com/0xF0D0)
* [Firo Yang](https://github.com/firogh)