e3a646675f
bss for vbr stage
2024-10-13 17:52:28 -04:00
9d33469e32
fixed bss init in mbr
2024-10-13 17:52:09 -04:00
dd1a74bff0
pass location of partition_table structure to vbr
2024-10-13 16:41:39 -04:00
832141efb4
bss convertion for mbr stage
2024-10-13 16:36:11 -04:00
c919144496
turns out huge unreal mode isn't supported in bochs
...
huge unreal mode is 4GiB code in 16bit mode + 4GiB data
we will just use the regular big flat model instead (64KiB code/4GiB data)
2024-10-13 14:50:49 -04:00
a62f3de26f
unreal gdt tweaks & fixes
2024-10-13 13:22:01 -04:00
bd40d6d324
relocate code sections to end up with stage2 starting at 0x500
2024-10-12 22:14:47 -04:00
d1f8ec4a9e
follow standard proceedure and reallocate the mbr to 0x600
2024-10-12 21:21:43 -04:00
2fa03c31d7
partially roll back changing the segment to 0x07E0
2024-10-12 20:25:04 -04:00
f535840572
big step...and also its completely broken right now
...
we are going to use 0x07E0 as our base segment so we have a bit
more memory to work with until we are fully in 32bit protected mode.
this commit is broken but is just one step towards a working release.
2024-10-12 15:41:39 -04:00
276fe70572
use early_mem.inc
2024-10-12 15:38:47 -04:00
31c45051e6
minor cleanup related to memory refactor
2024-10-12 12:57:56 -04:00
a523e17d27
moved stuff that is only referenced in Stage2 to stage2 bss
2024-10-12 12:55:29 -04:00
65e5a83eb4
stage2 is now a multisection binary file
...
also preparing to move memory globals to bss section.
2024-10-12 11:29:20 -04:00
cd048933ec
output symbol maps to ease debuging
2024-10-12 11:28:25 -04:00
60aaf5cdd9
move far jump setup in EnterUnrealMode to right after we save CS
2024-10-11 21:51:07 -04:00
075e51c8bc
move macro definition super early
...
fix a few mistakes in macro defs
2024-10-11 19:31:31 -04:00
48cd0f742d
added macros to define cstr and str
...
aligned all the entry points for proceedures to 4 bytes
added a PrintString wraper macro
2024-10-11 19:05:15 -04:00
e5fb1b41eb
added bochs debug wrappers
2024-10-11 19:03:27 -04:00
802d47fbf7
fix passing stage2 wrong data for boot drive
2024-10-11 13:09:17 -04:00
056551fdd1
rename file to BOOT.BIN
...
K.I.S.S.
2024-10-11 12:16:01 -04:00
00daf92df5
unreal gdt now has 2 selectors 1 code, 1 data
...
ss, and e/f/g segments are loaded to the same flat 4gb segment
moved gdt notes to documentation
2024-10-08 20:22:21 -04:00
6ae68d1a19
ensure 2 byte jmp rel8 thunk to init
...
surpress reloc abs warnings
corrected include paths/filenames
2024-10-08 08:55:17 -04:00
4218a08658
force the first jump to init in all stages to be the rel8 version
2024-10-07 20:39:39 -04:00
2bbdaddb68
jmp imm32 vs jmp rel8 (5 bytes vs 2 bytes)
2024-10-06 21:46:32 -04:00
213ea11209
cutting out everything from miniboot
...
this file has always just been a place holder to get some code to load from the disk
I wanted to cut out all the extra stuff in it just to simplify things down.
2024-10-06 18:52:20 -04:00
e41b597056
surpress some of the relocation warnings for mbr, vbr & stage2
2024-10-06 18:50:32 -04:00
145e9fbaa9
fixed read_disk_raw in ReadFATCluster
...
boot_drive and partition_offset are global pointers now
removed an extra error from mbr disk read
and some general formating and cleanup 😅
2024-10-05 20:14:00 -04:00
8f95c8f267
tons more work on modularizing the code
2024-10-05 18:55:00 -04:00
5440a1ae61
more modularization and updating date in MIT licence header
2024-10-05 13:35:39 -04:00
a4fa48949c
Move fat32 and BIOS functions to their own files
2024-10-05 12:04:40 -04:00
e162e268c4
remove the dword stack macros and just use the 32bit override
2024-10-05 10:13:18 -04:00
62f036b645
change test kernel stage name
...
also pointed up a bug in memory.inc
2024-10-04 22:17:35 -04:00
d93236d298
some bpb/ebpb tweaks
2024-10-04 11:48:25 -04:00
3f029e6b4c
vbr cdecl overhaul
...
refactored read_disk_raw to read_stage2_raw
switched to new kmem functions
2024-10-04 09:56:41 -04:00
30c4f1b82c
move cdecl macros to nearly the top so early functions can use them
2024-10-04 09:55:45 -04:00
597132df9f
cdecl16 overhaul for mbr code
...
switch to cdecl kmem* functions
refactored read_disk_raw to read_vbr_raw
fixed a small issue where the mbr wasn't checking its signature
2024-10-04 09:55:19 -04:00
36b8869140
add bpb and ebpb reserve area back to vbr.nasm
2024-10-03 21:00:02 -04:00
b96f587921
add forked functions and remove from memory.inc for kmem*
2024-10-03 19:53:11 -04:00
015def8d52
rough pass on fixing the stack across the board
2024-10-03 19:02:47 -04:00
8157dd301c
swap order of entering Unreal mode and getting an E820
...
also InitFATDriver should be ok to add to the start process again.
2024-10-03 18:15:18 -04:00
de5b0ddc5d
cdecl16 update for EnterUnrealMode
2024-10-03 17:59:29 -04:00
2cfe86efac
refactored and validated MemoryMap funciton
2024-10-03 17:41:48 -04:00
c8ca94d7ba
some general cleanup & moving the halt to the next point in main()
2024-10-03 16:43:10 -04:00
ac6110aa40
cdecl16 work and cleanup in MemoryMap
2024-10-03 16:34:27 -04:00
46717935a1
src/stage2/stage2.nasm:573: warning: label alone on a line without a colon might be in error [-w+label-orphan]
2024-10-03 15:28:44 -04:00
f691000a31
cdecl16 for EnableA20 ver.1
2024-10-03 15:10:22 -04:00
c524d8801d
replace prologs and epilogs in cdecl functions so far
2024-10-03 14:51:43 -04:00
929962eaca
bunch of changes mostly to do with cdecl16 conformity
...
moved top of stack marker to init
SetTextMode and Cursor done before hello msg
corrected CC/Stack usage to conform with cdecl16 for PrintString
corrected CC/Stack usage to conform with cdecl16 for PrintChar
corrected stack usage to conform with cdecl16 for SetTextMode
corrected stack usage to conform with cdecl16 for disable_cursor
2024-10-03 13:49:44 -04:00
054f4320ba
fixing how the stack works stage1 😳
2024-10-02 12:37:21 -04:00
