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| author | Aleksa Vuckovic <aleksav013@gmail.com> | 2022-09-08 14:37:47 +0200 |
|---|---|---|
| committer | Aleksa Vuckovic <aleksav013@gmail.com> | 2022-09-08 14:38:29 +0200 |
| commit | 82e9f02aef1ea1a6588234ee58e3625e3561005f (patch) | |
| tree | 80214489336fa2cc1c615bd63b133934832a5ba4 /kernel/src/boot/boot64.S | |
| parent | 1effe3b9ac0bb1a819f6ae5ebb8438e60b77f9a2 (diff) | |
higher half in x86_64
kernel is now located at -2GB
heap blocks are aligned on block size
paging will allocate new page tables on heap
Diffstat (limited to 'kernel/src/boot/boot64.S')
| -rw-r--r-- | kernel/src/boot/boot64.S | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/kernel/src/boot/boot64.S b/kernel/src/boot/boot64.S index cc79c36..e95f55b 100644 --- a/kernel/src/boot/boot64.S +++ b/kernel/src/boot/boot64.S @@ -1,16 +1,25 @@ -.section .text .code64 +.set KERNEL_VMA, 0xffffffff80000000 + +.section .boot64.text, "a" + .global begin_long_mode begin_long_mode: - // reload segment registers - mov $0x10, %ax - mov %ax, %ds - mov %ax, %es - mov %ax, %ss - mov %ax, %fs - mov %ax, %gs +// xchgw %bx, %bx +// mov $0x10, %ax +// mov %ax, %ds +// mov %ax, %es +// mov %ax, %ss +// mov %ax, %fs +// mov %ax, %gs + add $KERNEL_VMA, %rsp + movabs $jump_main, %rax + jmp *%rax + +.section .text +jump_main: popq %rdi popq %rsi call kernel_main |