raeofsunshine
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KimisOS
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Loading Modules

This commit is contained in:
notsomeidiot123 2024-12-04 13:55:24 -05:00
parent 7fba027497
commit b9c0b9434e
2 changed files with 53 additions and 5 deletions
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3
docs/boot.md
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@ -86,4 +86,5 @@ While any GDT loaded for the Kernel will work, once the Kernel wants to load use
|1 |A20 Line could not be enabled| |1 |A20 Line could not be enabled|
|2|Failed to read from disk| |2|Failed to read from disk|
|3|Corrupted/Invalid ELF formatted file| |3|Corrupted/Invalid ELF formatted file|
|4|Failed to find suitable location in memory for kernel| |4|Failed to find suitable location in memory for kernel|
|5|Failed to locate kernel file|

55
src/bootloader/main.s
View File

@ -306,7 +306,9 @@ part_2:
; debug ; debug
mov edi, kernel_file mov edi, kernel_file
call open_file call open_file
add edx, 0x40000;is 200 kb enough for a filesystem diver and a disk driver? cmp eax, -1
je file_not_found
add edx, 0x40000;is 1mb enough for a filesystem diver and a disk driver?
call find_kpaddr call find_kpaddr
; debug ; debug
mov esi, eax mov esi, eax
@ -318,9 +320,46 @@ part_2:
; debug ; debug
mov esi, [kload_paddr] mov esi, [kload_paddr]
call load_elf call load_elf
; debug
push eax push eax
mov edi, disk_module_file
call open_file
cmp eax, -1
je .find_fs_driver_no_disk
mov eax, esi
and edx, 0xfffffc00
add edx, 0x1000
add [kload_paddr], edx
mov edi, edx
mov [disk_module_struct.ptr], edi
call read_file
jc load_fail
.find_fs_driver_no_disk:
mov ax, 0xe41
int 0x10
.find_fs_driver:
mov edi, fs_module_file
call open_file
cmp eax, -1
je .start32_no_fs
mov eax, esi
and edx, 0xfffffc00
add edx, 0x1000
add [kload_paddr], edx
mov edi, edx
mov [fs_module_struct.ptr], edi
call read_file
jc load_fail
.start32_no_fs:
mov ax, 0xe42
int 0x10
.start32:
; debug
; push eax
cli cli
mov eax, page_table mov eax, page_table
mov cr3, eax mov cr3, eax
@ -346,6 +385,12 @@ protected_mode:
jmp eax jmp eax
jmp $ jmp $
bits 16 bits 16
file_not_found:
mov ah, 0xe
mov al, 'E'
int 0x10
mov al, '5'
int 0x10
load_kernel: load_kernel:
get_mmap: get_mmap:
pushad pushad
@ -813,7 +858,9 @@ fs_module_struct:
.ptr: dd 0 .ptr: dd 0
.type: dd 2 .type: dd 2
.next_entry: dd 0 .next_entry: dd 0
kernel_file: db "kernel", 0x0, 0x0, "elf" kernel_file: db "kernel", 0, 0, "elf"
disk_module_file: db "idm", 0, 0, 0, 0, 0, "elf"
fs_module_file: db "ifsm", 0, 0, 0, 0, "elf"
loaded_fat_block: dd 0 loaded_fat_block: dd 0
last_allocated_pgtb: dd 0x10000 last_allocated_pgtb: dd 0x10000
sacrifice1: dd 0 sacrifice1: dd 0