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Merge remote-tracking branch 'Kernel/master'

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EnderIce2
2024-11-20 05:00:33 +02:00
parent 93d408e0af 19f2a78d35
commit 682c84b2af
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Kernel/arch/amd64/bootstrap/multiboot/Helper/gdt64.s Normal file
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/*
This file is part of Fennix Kernel.
Fennix Kernel is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
*/
.code64
.section .bootstrap.data, "a"
/* Access bits */
A = 0x1
RW = 0x2
DC = 0x4
E = 0x8
S = 0x10
DPL0 = 0x0 /* 0 << 5 ???? */
DPL1 = 0x20
P = 0x80
/* Flags bits */
LONG_MODE = 0x20
SZ_32 = 0x40
GRAN_4K = 0x80
.global GDT64.Null
.global GDT64.Code
.global GDT64.Data
.global GDT64.Tss
.global GDT64.Ptr
GDT64:
GDT64.Null = . - GDT64
.quad 0
GDT64.Code = . - GDT64
.long 0xFFFF
.byte 0
.byte P | S | E | RW
.byte GRAN_4K | LONG_MODE | 0xF
.byte 0
GDT64.Data = . - GDT64
.long 0xFFFF
.byte 0
.byte P | S | RW
.byte GRAN_4K | SZ_32 | 0xF
.byte 0
GDT64.Tss = . - GDT64
.long 0x00000068
.long 0x00CF8900
GDT64.Ptr:
.word . - GDT64 - 1
.quad GDT64