michaelkuc6/blog_os
1
0
Fork 0
mirror of https://github.com/phil-opp/blog_os.git synced 2025-12-16 14:27:49 +00:00
Code Issues Projects Releases Wiki Activity

Increase stack size to 4096

Browse Source
This commit is contained in:
Philipp Oppermann
2015-11-14 13:20:18 +01:00
parent 2d1c801c72
commit fc389c9e9e
2 changed files with 12 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
posts/DRAFT-allocating-frames.md
View File

@@ -5,6 +5,17 @@ title: 'Allocating Frames'
TODO
## Preparation
We still have a really tiny stack of 64 bytes, which won't suffice for this post. So we will increase it to 4096 (one page) in `boot.asm`:
```asm
section .bss
...
stack_bottom:
resb 4096
stack_top:
```
## The Multiboot Information Structure
When a Multiboot compliant bootloader loads a kernel, it passes a pointer to a boot information structure in the `ebx` register. We can use it to get information about available memory and loaded kernel sections.

2
src/arch/x86_64/boot.asm
View File

@@ -152,7 +152,7 @@ p3_table:
p2_table:
resb 4096
stack_bottom:
resb 64
resb 4096
stack_top:
section .rodata