Difference between revisions of "Poky manual"

Revision as of 13:53, 4 June 2016

Description

• Building embedded Linux image for Zynq ARMv7 platform - Elphel 10393 board

About

• Yocto Poky revision = 2.0
• Host OS = Kubuntu 14.04.3 LTS x64

Required packages

• Found in Yocto Project mega-manual :

Ubuntu and Debian

sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \
build-essential chrpath socat libsdl1.2-dev xterm

sudo dnf install gawk make wget tar bzip2 gzip python unzip perl patch \
diffutils diffstat git cpp gcc gcc-c++ glibc-devel texinfo chrpath \
ccache perl-Data-Dumper perl-Text-ParseWords perl-Thread-Queue socat \
findutils which SDL-devel xterm  

sudo zypper install python gcc gcc-c++ git chrpath make wget python-xml \
diffstat makeinfo python-curses patch socat libSDL-devel xterm                        

sudo yum install gawk make wget tar bzip2 gzip python unzip perl patch \
diffutils diffstat git cpp gcc gcc-c++ glibc-devel texinfo chrpath socat \
perl-Data-Dumper perl-Text-ParseWords perl-Thread-Queue SDL-devel xterm

Other dependencies

sudo apt-get install python-numpy

Output files

Found in the poky's deploy directory:

• files for rootfs in NAND Flash: poky/build/tmp/deploy/images/elphel393/nand/
• files for rootfs on MMC (micro SD card): poky/build/tmp/deploy/images/elphel393/mmc/

These names are listed as they appear in the u-boot configuration header file - actual output files have different names:

• boot.bin - u-boot as the first stage bootloader = Secondary Program Loader that boots u-boot-dtb.img
• u-boot-dtb.img - full size u-boot with a stripped device tree (cat u-boot.img some_stripped_devicetree.dtb > u-boot-dtb.img)
• devicetree.dtb - device tree with listed interfaces, zynq registers, interrupts and drivers
• uImage - kernel, drivers
• rootfs.ubifs or rootfs.tar.gz - rootfs

Boot options

Boot from micro SD card (rootfs)

• The micro SD card/adapter must be modified for this boot mode (to keep CD pin high) - only then the camera will boot
• EXT4 partition mounted as /
• Detailed instructions

Boot from NAND flash (rootfs)

• The default boot option - power on.
• A UBIFS image is written to /dev/mtd4 - is mounted as /
• Detailed instructions

Notes

• It is possible to unpack rootfs to RAM not mounting any partitions (/ in RAM, ramdisk):
  • Changes are not stored
  • Boot faster?
  • Work faster?
  • Modify env commands in the u-boot (in elphel393.h or when in the u-boot command line)
  • Carefully check the actual and hardcoded images' sizes in the u-boot (elphel393.h) and the device tree (elphel393_xxx.dts) with the actual sizes.

Setup

git clone https://github.com/Elphel/elphel393.git
cd elphel393
./setup.sh dev
cd poky
. ./oe-init-build-env
bitbake u-boot device-tree linux-xlnx core-image-elphel393

Build bootloader

bitbake u-boot-ezynq
or
bitbake u-boot
or
bitbake virtual/bootloader

Output

• poky/build/tmp/deploy/images/<machine>/boot.bin
• poky/build/tmp/deploy/images/<machine>/u-boot-dtb.img

Notes

• Since Poky 1.5.1 switched from u-boot-xlnx to u-boot - some of the u-boot-xlnx reached the upstream
• Since Poky 1.5.1 u-boot introduced Kconfig and currently (as of 2016/01/22) is still migrating from autoconf - keeping both build methods working together.
• Current u-boot uses the board's device tree blob to make a stripped version for itself - uncompiled device tree files are present in the u-boot sources

Compile devicetree

bitbake device-tree

Output

• poky/build/tmp/deploy/images/<machine>/devicetree.dtb

Build kernel

bitbake linux-xlnx
or
bitbake virtual/kernel

Output

• poky/build/tmp/deploy/images/<machine>/uImage (kernel)

Notes

• Kernel version is 4.0, linux-xlnx
• Device Tree Blob is compiled separately in linux-xlnx
• Uncompiled device tree files are present in the linux sources provided by linux-xlnx

Build ramdisk.image.gz

bitbake core-image-elphel393

Output

• poky/build/tmp/deploy/images/<machine>/uramdisk.image.gz (the file has *.u-boot extension after it's built)

Notes

• [FIXED] lighttpd-1.4.39, mod-cgi

compile warning:

implicit declaration of function 'chunkqueue_written'

results in lighttpd failing to start if mod-cgi is enabled:

Starting Lighttpd Web Server: 2016-01-26 18:42:17: (/data/GIT_fresh/poky/build/tmp/work/cortexa9-vfp-neon-poky-linux-gnueabi/lighttpd/1.4.36-r0/lighttpd-1.4.36/src/plugin.c.169) dlopen() failed for: /usr/lib/mod_cgi.so /usr/lib/mod_cgi.so: undefined symbol: chunkqueue_w 
2016-01-26 18:42:17: (/data/GIT_fresh/poky/build/tmp/work/cortexa9-vfp-neon-poky-linux-gnueabi/lighttpd/1.4.36-r0/lighttpd-1.4.36/src/server.c.679) loading plugins finally failed 
lighttpd.

Note: why 1.4.36?!!

solution: exclude the 0001-mod_cgi-buffers-data-without-bound.patch from the file list that comes with the poky/meta/recipes-extended/lighttpd_1.4.39.bb

Errors

• Aborted, core dumped
  • possible reason - Kubuntu 14.04 - the system libraries are too old? The up-to-date Kubuntu release is 16.04.
  • command (example):

bitbake libxau-native

• • log:

| x86_64-linux-libtool: link: ar cru .libs/libXau.a  AuDispose.o AuFileName.o AuGetAddr.o AuGetBest.o AuLock.o AuRead.o AuUnlock.o AuWrite.o
| *** buffer overflow detected ***: ar terminated
| ======= Backtrace: =========
| /lib/x86_64-linux-gnu/libc.so.6(+0x7329f)[0x2b732eade29f]
| /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x5c)[0x2b732eb75bbc]
| /lib/x86_64-linux-gnu/libc.so.6(+0x109a90)[0x2b732eb74a90]
| /lib/x86_64-linux-gnu/libc.so.6(+0x108f99)[0x2b732eb73f99]
| /lib/x86_64-linux-gnu/libc.so.6(_IO_default_xsputn+0xbc)[0x2b732eae660c]
| /lib/x86_64-linux-gnu/libc.so.6(_IO_padn+0xa0)[0x2b732eada600]
| /lib/x86_64-linux-gnu/libc.so.6(_IO_vfprintf+0x3c4d)[0x2b732eab888d]
| /lib/x86_64-linux-gnu/libc.so.6(__vsprintf_chk+0x84)[0x2b732eb74024]
| /lib/x86_64-linux-gnu/libc.so.6(__sprintf_chk+0x7d)[0x2b732eb73f7d]
| ar[0x406d20]
| ar[0x4088df]
| ar[0x40bf08]
| ar[0x404a86]
| ar[0x405003]
| ar[0x402a45]
| /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5)[0x2b732ea8cf45]
| ar[0x402dc5]
| ======= Memory map: ========
| 00400000-00482000 r-xp 00000000 08:01 27273645                           /usr/local/bin/ar
| 00682000-00683000 r--p 00082000 08:01 27273645                           /usr/local/bin/ar
| 00683000-00684000 rw-p 00083000 08:01 27273645                           /usr/local/bin/ar
| 00776000-007e0000 rw-p 00000000 00:00 0                                  [heap]
| 2b732e846000-2b732e869000 r-xp 00000000 08:01 26740221                   /lib/x86_64-linux-gnu/ld-2.19.so
| 2b732e869000-2b732e86d000 rw-p 00000000 00:00 0
| 2b732e898000-2b732e89b000 rw-p 00000000 00:00 0
| 2b732ea68000-2b732ea69000 r--p 00022000 08:01 26740221                   /lib/x86_64-linux-gnu/ld-2.19.so
| 2b732ea69000-2b732ea6a000 rw-p 00023000 08:01 26740221                   /lib/x86_64-linux-gnu/ld-2.19.so
| 2b732ea6a000-2b732ea6b000 rw-p 00000000 00:00 0
| 2b732ea6b000-2b732ec25000 r-xp 00000000 08:01 26740235                   /lib/x86_64-linux-gnu/libc-2.19.so
| 2b732ec25000-2b732ee25000 ---p 001ba000 08:01 26740235                   /lib/x86_64-linux-gnu/libc-2.19.so
| 2b732ee25000-2b732ee29000 r--p 001ba000 08:01 26740235                   /lib/x86_64-linux-gnu/libc-2.19.so
| 2b732ee29000-2b732ee2b000 rw-p 001be000 08:01 26740235                   /lib/x86_64-linux-gnu/libc-2.19.so
| 2b732ee2b000-2b732ee30000 rw-p 00000000 00:00 0
| 2b732ee30000-2b732ee46000 r-xp 00000000 08:01 26741717                   /lib/x86_64-linux-gnu/libgcc_s.so.1
| 2b732ee46000-2b732f045000 ---p 00016000 08:01 26741717                   /lib/x86_64-linux-gnu/libgcc_s.so.1
| 2b732f045000-2b732f046000 rw-p 00015000 08:01 26741717                   /lib/x86_64-linux-gnu/libgcc_s.so.1
| 7fffb978b000-7fffb97ad000 rw-p 00000000 00:00 0                          [stack]
| 7fffb97f8000-7fffb97fa000 r-xp 00000000 00:00 0                          [vdso]
| ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]
| ./x86_64-linux-libtool: line 1723:  8035 Aborted                 (core dumped) ar cru .libs/libXau.a AuDispose.o AuFileName.o AuGetAddr.o AuGetBest.o AuLock.o AuRead.o AuUnlock.o AuWrite.o
| make[2]: *** [libXau.la] Error 134
| make[2]: Leaving directory `/GIT/elphel393/poky/build/tmp/work/x86_64-linux/libxau-native/1_1.0.8-r0/build'
| make[1]: *** [all-recursive] Error 1
| make[1]: Leaving directory `/GIT/elphel393/poky/build/tmp/work/x86_64-linux/libxau-native/1_1.0.8-r0/build'
| make: *** [all] Error 2
| ERROR: oe_runmake failed