Disk images for ARM based Genode Scenarios

[Martin Stein]

Hi,

On 04.01.2018 16:51, Alexander Boettcher wrote:
> Hello,
> 
> On 02.01.2018 19:42, Baconicsynergy via genode-main wrote:
>> I built a simple log Genode scenario for wand_quad for testing purposes, and I am previously used to receiving iso images for x86_32/x86_64.
>>
>> However, there is no iso image! I am left with a log.core file in the var/run directory and I don't know how to construct a bootable microSD card image from these files.
> 
> by default you will find a file
> build/wand_quad/var/run/<run-name>/image.elf, which could be used by
> your u-boot with the 'bootelf' command (if supported by the bootloader
> on your sd-card).
> 
> You may also build an Genode image to be used with 'bootm' command of
> your u-boot. Add to the RUN_OPT in your build/wand_quad/etc/build.conf
> 
> RUN_OPT += --include image/uboot
> 
> After you invoked the re-run the run script you will find the image
> under build/wand_quad/var/run/<run-name>/uImage
> 
> The u-boot (and SD-card) you have to setup yourself. Either you have one
> already shipped with your board or you may try to create a u-boot using
> our tool in "tool/create_uboot".

When using the create_uboot tool, an image file for your MMC is created
containing a freshly built u-boot and all what u-boot needs to run on WandBoard.
The image has a size of 8 Mb and, at the end, the tool tells you the command
line to copy the image to your MMC with a seek of 1 byte. So you can create a
filesystem afterwards that starts, lets say, at 10 Mb offset for your Genode
images.

Unfortunately, the create_uboot tool doesn't work with the newest Genode
toolchain. But there's an easy way to circumvent this problem:

! # download older toolchain (change x86_64 to x86_32 in the URL if needed)
! wget https://sourceforge.net/projects/genode/files/genode-toolchain/16.05/genode-toolchain-16.05-x86_64.tar.bz2
!
! # rename your current toolchain so we're not going to overwrite it
! mv /usr/local/genode-gcc /usr/local/genode-gcc-latest
!
! # extract older toolchain (again you might adapt x86_64)
! sudo tar xPf genode-toolchain-16.05-x86_64.tar.bz2
!
! # rename older toolchain
! mv /usr/local/genode-gcc /usr/local/genode-gcc-16.05
!
! # make sure Genode uses the older toolchain
! ln -sf -T /usr/local/genode-gcc-16.05 /usr/local/genode-gcc
!
! # create MMC image
! tool/create_uboot wand_board
!
! # switch back to your current toolchain
! ln -sf -T /usr/local/genode-gcc-latest /usr/local/genode-gcc

I hope this helped?

Cheers,
Martin