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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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7
Kernel/mkmap.sh
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@ -1,11 +1,6 @@
#!/bin/sh
tmp=$(mktemp)
if [ -f Kernel32 ]; then
kernel_binary=Kernel32
else
kernel_binary=Kernel64
fi
nm -n $kernel_binary | grep -vE \\.Lubsan_data | awk '{ if ($2 != "a") print; }' | uniq > "$tmp"
nm -n Kernel | grep -vE \\.Lubsan_data | awk '{ if ($2 != "a") print; }' | uniq > "$tmp"
printf "%08x\n" "$(wc -l "$tmp" | cut -f1 -d' ')" > kernel.map
c++filt < "$tmp" >> kernel.map
rm -f "$tmp"