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Kernel: Introduce basic pre-kernel environment

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This implements a simple bootloader that is capable of loading ELF64
kernel images. It does this by using QEMU/GRUB to load the kernel image
from disk and pass it to our bootloader as a Multiboot module.

The bootloader then parses the ELF image and sets it up appropriately.
The kernel's entry point is a C++ function with architecture-native
code.

Co-authored-by: Liav A <liavalb@gmail.com>
This commit is contained in:
Gunnar Beutner 2021-07-18 14:47:32 +02:00 • committed by Andreas Kling
parent 357ddd393e
commit 7e94b090fe
30 changed files with 1207 additions and 181 deletions
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28
Meta/run.sh
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@ -204,7 +204,8 @@ elif [ "$SERENITY_RUN" = "qn" ]; then
"$SERENITY_QEMU_BIN" \
$SERENITY_COMMON_QEMU_ARGS \
-device e1000 \
-kernel Kernel/Kernel \
-kernel Kernel/Prekernel/Prekernel \
-initrd Kernel/Kernel \
-append "${SERENITY_KERNEL_CMDLINE}"
elif [ "$SERENITY_RUN" = "qtap" ]; then
# Meta/run.sh qtap: qemu with tap
@ -216,7 +217,8 @@ elif [ "$SERENITY_RUN" = "qtap" ]; then
$SERENITY_PACKET_LOGGING_ARG \
-netdev tap,ifname=tap0,id=br0 \
-device e1000,netdev=br0 \
-kernel Kernel/Kernel \
-kernel Kernel/Prekernel/Prekernel \
-initrd Kernel/Kernel \
-append "${SERENITY_KERNEL_CMDLINE}"
sudo ip tuntap del dev tap0 mode tap
elif [ "$SERENITY_RUN" = "qgrub" ]; then
@ -235,8 +237,22 @@ elif [ "$SERENITY_RUN" = "q35" ]; then
$SERENITY_VIRT_TECH_ARG \
-netdev user,id=breh,hostfwd=tcp:127.0.0.1:8888-10.0.2.15:8888,hostfwd=tcp:127.0.0.1:8823-10.0.2.15:23 \
-device e1000,netdev=breh \
-kernel Kernel/Kernel \
-kernel Kernel/Prekernel/Prekernel \
-initrd Kernel/Kernel \
-append "${SERENITY_KERNEL_CMDLINE}"
elif [ "$SERENITY_RUN" = "bootloader_test" ]; then
# Meta/run.sh q35: qemu (q35 chipset) with SerenityOS
echo "Starting SerenityOS with QEMU Q35 machine, Commandline: ${SERENITY_KERNEL_CMDLINE}"
"$SERENITY_QEMU_BIN" \
$SERENITY_COMMON_QEMU_Q35_ARGS \
$SERENITY_VIRT_TECH_ARG \
-netdev user,id=breh,hostfwd=tcp:127.0.0.1:8888-10.0.2.15:8888,hostfwd=tcp:127.0.0.1:8823-10.0.2.15:23 \
-device e1000,netdev=breh \
-kernel Kernel/Prekernel/Prekernel \
-initrd Kernel/Kernel \
-append "${SERENITY_KERNEL_CMDLINE}" \
-no-reboot \
-no-shutdown
elif [ "$SERENITY_RUN" = "ci" ]; then
# Meta/run.sh ci: qemu in text mode
echo "Running QEMU in CI"
@ -252,7 +268,8 @@ elif [ "$SERENITY_RUN" = "ci" ]; then
-nographic \
-display none \
-debugcon file:debug.log \
-kernel Kernel/Kernel \
-kernel Kernel/Prekernel/Prekernel \
-initrd Kernel/Kernel \
-append "${SERENITY_KERNEL_CMDLINE}"
else
# Meta/run.sh: qemu with user networking
@ -262,6 +279,7 @@ else
$SERENITY_PACKET_LOGGING_ARG \
-netdev user,id=breh,hostfwd=tcp:127.0.0.1:8888-10.0.2.15:8888,hostfwd=tcp:127.0.0.1:8823-10.0.2.15:23,hostfwd=tcp:127.0.0.1:8000-10.0.2.15:8000,hostfwd=tcp:127.0.0.1:2222-10.0.2.15:22 \
-device e1000,netdev=breh \
-kernel Kernel/Kernel \
-kernel Kernel/Prekernel/Prekernel \
-initrd Kernel/Kernel \
-append "${SERENITY_KERNEL_CMDLINE}"
fi