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[feat] Kernel jump

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pyao12
2026-05-09 21:37:17 +08:00
Unverified
parent c7ad2648ad
commit 386708c54b
4 changed files with 24 additions and 8 deletions
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Makefile
+5 -4
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@@ -1,7 +1,8 @@
all:
all:
mkdir -p build
gcc -Ignu-efi/inc -fpic -ffreestanding -fno-stack-protector -fno-stack-check -fshort-wchar -mno-red-zone -maccumulate-outgoing-args -c boot.c -o build/boot.o
ld -shared -Bsymbolic -Lgnu-efi/x86_64/lib -Lgnu-efi/x86_64/gnuefi -Tgnu-efi/gnuefi/elf_x86_64_efi.lds gnu-efi/x86_64/gnuefi/crt0-efi-x86_64.o build/boot.o -o build/boot.so -lgnuefi -lefi
gcc -Ignu-efi/inc -ffreestanding -fno-stack-protector -fno-stack-check -fshort-wchar -mno-red-zone -maccumulate-outgoing-args -std=c17 -c boot.c -o build/boot.o
g++ -Iinclude -Ignu-efi/inc -ffreestanding -fno-stack-protector -fno-stack-check -fshort-wchar -mno-red-zone -maccumulate-outgoing-args -std=c++17 -c kernel/main.cpp -o build/kernel.o
ld -shared -Bsymbolic -Lgnu-efi/x86_64/lib -Lgnu-efi/x86_64/gnuefi -Tgnu-efi/gnuefi/elf_x86_64_efi.lds gnu-efi/x86_64/gnuefi/crt0-efi-x86_64.o build/boot.o build/kernel.o -o build/boot.so -lgnuefi -lefi --no-undefined
objcopy -j .text -j .sdata -j .data -j .rodata -j .dynamic -j .dynsym -j .rel -j .rela -j .rel.* -j .rela.* -j .reloc --output-target efi-app-x86_64 --subsystem=10 build/boot.so build/BOOTX64.EFI
vdir: all
@@ -10,7 +11,7 @@ vdir: all
cp build/BOOTX64.EFI vdir/EFI/BOOT
run: vdir
qemu-system-x86_64 -bios /usr/share/ovmf/OVMF.fd -net none -drive file=fat:rw:vdir,index=0,format=vvfat -serial file:serial.log
qemu-system-x86_64 -bios /usr/share/ovmf/OVMF.fd -net none -drive file=fat:rw:vdir,index=0,format=vvfat -serial file:serial.log -serial stdio -s -S
clean:
rm -rf build vdir
boot.c
+7 -4
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@@ -1,17 +1,20 @@
#include <efi.h>
#include <efilib.h>
extern void kernel_main();
EFI_STATUS EFIAPI efi_main (EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *ST) {
InitializeLib(ImageHandle, ST);
// 不能直接ST->ConOut之类的，会GP，不知道为什么
// uefi_call_wrapper可以解决，而且比较安全（不过就是宏）
// 看着挺长，反正就在boot这里用到UEFI Out，后面不用，也就算了
uefi_call_wrapper(ST->ConOut->ClearScreen, 1, ST->ConOut);
uefi_call_wrapper(ST->ConOut->SetCursorPosition, 3, ST->ConOut, 0, 1);
uefi_call_wrapper(ST->ConOut->OutputString, 2, ST->ConOut, L"Welcome to SYLVA OS!\n");
uefi_call_wrapper(ST->ConOut->SetCursorPosition, 3, ST->ConOut, 0, 2);
uefi_call_wrapper(ST->ConOut->OutputString, 2, ST->ConOut, L"* The system has booted successfully.\n");
while (1); // 否则会直接跳到QEMU Setup
uefi_call_wrapper(ST->ConOut->SetCursorPosition, 3, ST->ConOut, 0, 3);
uefi_call_wrapper(ST->ConOut->OutputString, 2, ST->ConOut, L"* Jumping to kernel...\n");
kernel_main();
return EFI_SUCCESS;
}
include/.gitkeep
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kernel/main.cpp
+12
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@@ -0,0 +1,12 @@
#include <efi.h>
#include <efilib.h>
extern "C" void kernel_main();
void kernel_main() {
// uefi_call_wrapper((void*)ST->ConOut->ClearScreen, 1, ST->ConOut);
uefi_call_wrapper((void*)ST->ConOut->SetCursorPosition, 3, ST->ConOut, 0, 5);
uefi_call_wrapper((void*)ST->ConOut->OutputString, 2, ST->ConOut, L"Kernel is running!\n");
while (1);
}