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kernel boots with multiboot2

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This commit is contained in:
Alex 2022-10-13 06:43:12 +03:00
parent d5d5478d4d
commit b96b09a8b5
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
5 changed files with 109 additions and 20 deletions
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2
Architecture/aarch64/boot.S
View File

@ -11,7 +11,7 @@ _start:
str xzr, [x5], #8
sub w6, w6, #1
cbnz w6, 1b
2: bl aarch64Entry
2: bl arm64Entry
Halt:
wfe
b Halt

4
Architecture/aarch64/linker.ld
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@ -36,7 +36,7 @@ SECTIONS
/DISCARD/ :
{
*(.eh_frame)
*(.note .note.*)
*(.comment*)
*(.note*)
}
}

6
Architecture/amd64/linker.ld
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@ -36,4 +36,10 @@ SECTIONS
}
. += CONSTANT(MAXPAGESIZE);
_kernel_end = ALIGN(CONSTANT(MAXPAGESIZE));
/DISCARD/ :
{
*(.comment*)
*(.note*)
}
}

72
Architecture/i686/boot.asm Normal file
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@ -0,0 +1,72 @@
KERNEL_VIRTUAL_BASE EQU 0xE0000000
section .multiboot2.data
align 8
HEADER_START:
dd 0xE85250D6
dd 0
dd (HEADER_END - HEADER_START)
dd -(0xE85250D6 + (HEADER_END - HEADER_START))
align 8
dw 0
dw 0
dd 8
HEADER_END:
section .bss
STACK_BOTTOM: resb 16384
STACK_TOP:
align 4096
BOOT_PAGE_DIR0: resb 4096
BOOT_PAGE_TBL0: resb 4096
BOOT_PAGE_TBL1: resb 4096
section .multiboot2.text
extern x32Entry
extern _kernel_start
extern _kernel_end
global _start
_start:
mov esp, STACK_TOP - KERNEL_VIRTUAL_BASE
mov edi, BOOT_PAGE_TBL0 - KERNEL_VIRTUAL_BASE
mov esi, 0
mov ecx, 2048 - 301
.PagingLoop:
cmp esi, _kernel_start - KERNEL_VIRTUAL_BASE
jl .LoopInside
cmp esi, _kernel_end - KERNEL_VIRTUAL_BASE
jge .LoopEnd
mov eax, esi
or eax, 3
mov [edi], eax
.LoopInside:
add esi, 4096
add edi, 4
loop .PagingLoop
.LoopEnd:
push ebx
mov dword [BOOT_PAGE_DIR0 - KERNEL_VIRTUAL_BASE + (000 * 4)], (BOOT_PAGE_TBL0 - KERNEL_VIRTUAL_BASE + 3)
mov dword [BOOT_PAGE_DIR0 - KERNEL_VIRTUAL_BASE + (001 * 4)], (BOOT_PAGE_TBL1 - KERNEL_VIRTUAL_BASE + 3)
mov dword [BOOT_PAGE_DIR0 - KERNEL_VIRTUAL_BASE + (896 * 4)], (BOOT_PAGE_TBL0 - KERNEL_VIRTUAL_BASE + 3)
mov dword [BOOT_PAGE_DIR0 - KERNEL_VIRTUAL_BASE + (897 * 4)], (BOOT_PAGE_TBL1 - KERNEL_VIRTUAL_BASE + 3)
mov ecx, BOOT_PAGE_DIR0 - KERNEL_VIRTUAL_BASE
mov cr3, ecx
mov ecx, cr0
or ecx, 0x80010000
mov cr0, ecx
add esp, KERNEL_VIRTUAL_BASE
mov eax, CallKernelMain
jmp eax
section .text
CallKernelMain:
push ebx
call x32Entry
cli
.hang:
hlt
jmp .hang

45
Architecture/i686/linker.ld
View File

@ -1,45 +1,56 @@
OUTPUT_FORMAT(elf32-i386)
OUTPUT_ARCH(i386)
ENTRY(Entry)
ENTRY(_start)
KERNEL_VIRTUAL_BASE = 0xE0000000;
SECTIONS
{
. += 0xC0000000;
_kernel_start = .;
. = 0x00100000;
_kernel_start = . + KERNEL_VIRTUAL_BASE;
.text :
.multiboot.data :
{
*(.multiboot2.data)
}
.multiboot.text :
{
*(.multiboot2.text)
}
. += KERNEL_VIRTUAL_BASE;
.text ALIGN(4096) : AT(ADDR(.text) - KERNEL_VIRTUAL_BASE)
{
*(.text .text.*)
}
_kernel_text_end = ALIGN(CONSTANT(MAXPAGESIZE));
. += CONSTANT(MAXPAGESIZE);
_kernel_text_end = .;
.data :
.data ALIGN (4096) : AT(ADDR(.data) - KERNEL_VIRTUAL_BASE)
{
*(.data .data.*)
}
_kernel_data_end = ALIGN(CONSTANT(MAXPAGESIZE));
. += CONSTANT(MAXPAGESIZE);
_kernel_data_end = .;
.rodata :
.rodata ALIGN (4096) : AT(ADDR(.rodata) - KERNEL_VIRTUAL_BASE)
{
*(.rodata .rodata.*)
}
_kernel_rodata_end = ALIGN(CONSTANT(MAXPAGESIZE));
. += CONSTANT(MAXPAGESIZE);
_kernel_rodata_end = .;
.bss :
.bss ALIGN (4096) : AT(ADDR(.bss) - KERNEL_VIRTUAL_BASE)
{
_sbss = .;
*(COMMON)
*(.bss .bss.*)
_ebss = .;
}
. += CONSTANT(MAXPAGESIZE);
_kernel_end = ALIGN(CONSTANT(MAXPAGESIZE));
_kernel_end = .;
/DISCARD/ :
{
*(.eh_frame)
*(.note .note.*)
*(.comment*)
*(.note*)
}
}