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ZealBooter: Further cleanup and fix BIOS boot

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This commit is contained in:
mintsuki 2022-08-21 20:47:26 +02:00
parent ee265c8767
commit 1510f65468
4 changed files with 21 additions and 17 deletions
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14
build/build-temp-vm-uefi-1.sh
View file

@ -51,9 +51,15 @@ rm ../src/Home/Registry.ZC 2> /dev/null
rm ../src/Home/MakeHome.ZC 2> /dev/null
mount_tempdisk
sudo cp -r ../src/* $TMPMOUNT
[ ! -d "limine" ] && git clone https://github.com/limine-bootloader/limine.git --branch=v3.0-branch-binary --depth=1
if [ ! -d "limine" ]; then
git clone https://github.com/limine-bootloader/limine.git --branch=v3.0-branch-binary --depth=1
make -C limine
fi
sudo mkdir -p $TMPMOUNT/EFI/BOOT
sudo cp limine/BOOTX64.EFI $TMPMOUNT/EFI/BOOT/BOOTX64.EFI
sudo cp limine/limine.sys $TMPMOUNT/
sudo cp ../zealbooter/zealbooter.elf $TMPMOUNT/Boot/ZealBooter.ELF
umount_tempdisk
@ -69,8 +75,12 @@ if [ ! -d "ovmf" ]; then
cd ..
fi
echo "Testing..."
./limine/limine-deploy $TMPDISK
echo "Testing UEFI..."
qemu-system-x86_64 -machine q35,accel=kvm -drive format=raw,file=$TMPDISK -m 1G -rtc base=localtime -bios ovmf/OVMF.fd -smp 4
echo "Testing BIOS..."
qemu-system-x86_64 -machine q35,accel=kvm -drive format=raw,file=$TMPDISK -m 1G -rtc base=localtime -smp 4
echo "Deleting temp folder..."
rm -rf $TMPDIR

1
src/limine.cfg
View file

@ -1,4 +1,5 @@
TIMEOUT=2
INTERFACE_RESOLUTION=1024x768
:ZealOS
PROTOCOL=limine

11
zealbooter/trampoline.S
View file

@ -2,7 +2,11 @@
.global trampoline
trampoline:
pushq $0x18
mov $0x6000, %esp
lgdt (%rcx)
pushq $0x30
addq $(1f - trampoline), %rax
pushq %rax
lretq
@ -10,15 +14,13 @@ trampoline:
.code32
1:
mov $0x20, %eax
mov $0x10, %eax
mov %eax, %ds
mov %eax, %es
mov %eax, %fs
mov %eax, %gs
mov %eax, %ss
lgdt (%ecx)
mov %cr0, %eax
btr $31, %eax
mov %eax, %cr0
@ -31,7 +33,6 @@ trampoline:
mov %ebx, %eax
mov $2, %ebx
mov $0x7c00, %esp
jmp *%eax
.global trampoline_end

12
zealbooter/zealbooter.c
View file

@ -203,14 +203,6 @@ void _start(void) {
CKernel->boot_base = (uintptr_t)&CKernel->jmp - (uintptr_t)kernel->address;
CKernel->boot_base += final_address;
CKernel->sys_gdt.boot_ds.lo = 0x00CF92000000FFFF;
CKernel->sys_gdt.boot_cs.lo = 0x00CF9A000000FFFF;
CKernel->sys_gdt.cs32.lo = 0x00CF9A000000FFFF;
CKernel->sys_gdt.cs64.lo = 0x00209A0000000000;
CKernel->sys_gdt.cs64_ring3.lo = 0x0020FA0000000000;
CKernel->sys_gdt.ds.lo = 0x00CF92000000FFFF;
CKernel->sys_gdt.ds_ring3.lo = 0x00CFF2000000FFFF;
CKernel->sys_gdt_ptr.limit = sizeof(CKernel->sys_gdt) - 1;
CKernel->sys_gdt_ptr.base = (void *)&CKernel->sys_gdt - (uintptr_t)kernel->address;
CKernel->sys_gdt_ptr.base += final_address;
@ -251,8 +243,8 @@ void _start(void) {
void *trampoline_phys = (void *)final_address - ((uintptr_t)trampoline_end - (uintptr_t)trampoline);
memcpy(trampoline_phys, trampoline, ((uintptr_t)trampoline_end - (uintptr_t)trampoline));
memcpy((void *)final_address, CKernel, kernel->size);
memmove(trampoline_phys, trampoline, ((uintptr_t)trampoline_end - (uintptr_t)trampoline));
memmove((void *)final_address, CKernel, kernel->size);
asm volatile (
"jmp *%0"