mirror of
https://github.com/Zeal-Operating-System/ZealOS.git
synced 2024-12-27 15:56:30 +00:00
37 lines
494 B
ArmAsm
37 lines
494 B
ArmAsm
.section .text
|
|
|
|
.global trampoline
|
|
trampoline:
|
|
lgdt (%rcx)
|
|
|
|
pushq $0x30
|
|
addq $(1f - trampoline), %rax
|
|
pushq %rax
|
|
lretq
|
|
|
|
.code32
|
|
1:
|
|
|
|
mov $0x10, %eax
|
|
mov %eax, %ds
|
|
mov %eax, %es
|
|
mov %eax, %fs
|
|
mov %eax, %gs
|
|
mov %eax, %ss
|
|
|
|
mov %cr0, %eax
|
|
btr $31, %eax
|
|
mov %eax, %cr0
|
|
|
|
mov $0xc0000080, %ecx
|
|
xor %eax, %eax
|
|
xor %edx, %edx
|
|
wrmsr
|
|
|
|
mov %ebx, %eax
|
|
mov $2, %ebx
|
|
|
|
jmp *%eax
|
|
|
|
.global trampoline_end
|
|
trampoline_end:
|