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Kernel: Build the x86_64 kernel as an ELF32 executable

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Multiboot only supports ELF32 executables. This changes the build
process to build an ELF32 executable which has a 32-bit entry point,
but consists of mostly 64-bit code.
This commit is contained in:
Gunnar Beutner 2021-06-24 13:08:19 +02:00 • committed by Andreas Kling
parent 04ba5cfcad
commit c9747a3236
3 changed files with 37 additions and 11 deletions
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7
Kernel/mkmap.sh
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@ -1,6 +1,11 @@
#!/bin/sh
tmp=$(mktemp)
nm -n Kernel | awk '{ if ($2 != "a") print; }' | uniq > "$tmp"
if [ -f Kernel32 ]; then
kernel_binary=Kernel32
else
kernel_binary=Kernel64
fi
nm -n $kernel_binary | awk '{ if ($2 != "a") print; }' | uniq > "$tmp"
printf "%08x\n" "$(wc -l "$tmp" | cut -f1 -d' ')" > kernel.map
cat "$tmp" >> kernel.map
rm -f "$tmp"