binary naming

[Johannes Kliemann]

Hi again,

I fixed the file naming and I don't need to rename the files anymore (I 
forgot to prepend the correct directory in the cpio archive).
With the cpio initramfs I chdir into /genode from the ROM session and 
correctly find the libraries. Yet the segfault and warning I described 
in the last mail still appear.

To reproduce the problem with the current state, check out [1]. The 
build configuration is the same as in the last mail.

Regards,
Johannes

[1]: 
https://github.com/jklmnn/genode/commit/2c899063f2bad1318bbde88f2472e017fc72be34

On 10/24/17 11:27, Johannes Kliemann wrote:
> Hi,
> 
> while booting Genode directly on Linux I encountered the problem that
> Linux requires to call `/init` in the initramfs. Unfortunately Genode
> requires to call `core` which loads `init` so renaming core to init
> isn't enough.
> 
> 
> I renamed init to init2 core to init and called it with "label=init2"
> which works at first (core finds all ROM sessions) but then segfaults
> with "init2[45]: segfault at 7f11c473b128 ip 00007f11c4645f40 sp
> 00007ffc1c8c15f8 error 4 in ld.lib.so[7f11c45c5000+95000]" and the
> warning "Warning: blocking canceled in entrypoint constructor".
> 
> This warning was addressed on Linux before in [0] and fixed in
> ad2859b6b9dae96c48329eebc0a73527ba4deb9b. I have already included this
> patch.
> 
> To boot Genode on Linux with this behaviour, checkout [1] and change
> "KERNEL_RUN_OPT(linux) := --include power_on/linux --include log/linux"
> to
> "KERNEL_RUN_OPT(linux) := $(QEMU_RUN_OPT)"
> in your etc/build.conf (with linux as kernel ofc).
> 
> Beside renaming I also tried to make the ROM session chdir into a sub
> directory or to prepend this directory to the binary name. Neither of
> made Genode correctly find the binaries. I have to say that Linux is not
> booting into a real fs but is using a initramfs which consists of a cpio
> archive.
> 
> What would be the way to go to either rename the binaries to a Linux
> compatible scheme or to change the library search to find its binaries
> in a cpio archive (both options should be changeable at build time to
> still use the current linux)?
> 
> Regards,
> Johannes
> 
> [0]: https://github.com/genodelabs/genode/issues/2521
> [1]:
> https://github.com/jklmnn/genode/commit/ef4becffcfc4bfc4079ff411872023b0362f346c
> 
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