I've built this small utility because I thought I need to locate Device Tree
objects in binaries and dump them in text-form.
This helped me when I was running OpenBSD 7.1 on arm-based PineBook Pro.
I copy-pasted fdt.c and fdt.h from OpenBSD's
efiboot.
I did some lame adjustments for the sake of convenience.
It could be that using libfdt was cleaner and better option, but back then I did not know
it actually exists. efiboot code was pretty simple and easy to understand
so I just reused it.
For the time being I only built it in OpenBSD using native make(1). Perhaps I will add support for other BSDs and Linux/MacOs.
Note: it needs to be checked whether fdtdump or dtc -o is a better fit for this task.
In this case, current utility could be minimized to only locate dtb objects in a given binary
and dump them as separate files. (text file with list of dumped object, their offset and
size should then also be generated).
- OpenBSD
- FreeBSD
- NetBSD
- MacOS
- Linux
I used to build it on OpenBSD using make(1). GNU make is currently not supported and Linux build has not been tested.
make
To build on Linux/MacOS, use this:
make
./main /usr/local/...