Sinipelto
/
banan-os
forked from Bananymous/banan-os
1
0
Fork 0
Code Pull Requests Activity

Kernel: Only allocate single GDT entry during boot.S 

When we need more, we should probably initialize rest of them
in cpp code
This commit is contained in:
Bananymous 2023-01-30 18:55:57 +02:00
parent 1954f223ad
commit cb3b62d665
1 changed files with 2 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
kernel/arch/x86_64/boot.S
View File

@ -73,11 +73,8 @@ g_multiboot_magic:
.skip 8
boot_gdt:
.quad 0 # null descriptor
.quad (GDT_F_G | GDT_F_L ) | (GDT_A_P | (0 * GDT_A_DPL) | GDT_A_S | GDT_A_E | GDT_A_RW) | (0xF << 48 | 0xFFFF) # kernel code
.quad (GDT_F_G | GDT_F_DB ) | (GDT_A_P | (0 * GDT_A_DPL) | GDT_A_S | GDT_A_RW) | (0xF << 48 | 0xFFFF) # kernel data
.quad (GDT_F_G | GDT_F_L ) | (GDT_A_P | (3 * GDT_A_DPL) | GDT_A_S | GDT_A_E | GDT_A_RW) | (0xF << 48 | 0xFFFF) # userspace code
.quad (GDT_F_G | GDT_F_DB ) | (GDT_A_P | (3 * GDT_A_DPL) | GDT_A_S | GDT_A_RW) | (0xF << 48 | 0xFFFF) # userspace data
.quad 0 # null descriptor
.quad (GDT_F_G | GDT_F_L ) | (GDT_A_P | (0 * GDT_A_DPL) | GDT_A_S | GDT_A_E | GDT_A_RW) | (0xF << 48 | 0xFFFF) # kernel code
boot_gdtr:
.short . - boot_gdt - 1
.quad boot_gdt