boot: longmode to realmode stub

This is the initial commit to the repo. It adds all the code.
The last proper thing that I got working before committing is
calling real mode functions from long mode using a stub.
Next up, I would like to implement a disk reader abstraction over
the BIOS in order to read form partitions (most notably FAT32).

1 files changed, 22 insertions, 0 deletions

diff --git a/run.sh b/run.sh
new file mode 100755
index 0000000..0e136e4
--- /dev/null
+++ b/run.sh
@@ -0,0 +1,22 @@
+#!/bin/sh -e
+
+# :Tell hare to use our custom runtime
+# and linker scripts (this feature is so simple and neat :))
+export HAREPATH=.
+
+# :Tell the linker to add this argument to discard
+# unused sections
+export LDFLAGS="--gc-sections"
+
+# :Do the build
+hare build -X^ -T+x86_64
+
+# :Create a flat binary out of the elf file
+# (while also removing the breaking gnu note)
+objcopy \
+	--remove-section .note.gnu.property \
+	-I elf64-x86-64 -O binary \
+	--binary-architecture=i386:x86-64 \
+	boot boot.bin
+
+bochs