[Ltib] Issues regarding JFFS2/NOR

[Hamilton Vera]

Hi masters, I am trying to deploy a jffs2 image using ltib
./ltib --version
ltib 9.1.1 ($Revision: 1.42 $)

Unfortunately I am facing some problems and I would like to know if
they are isolated. We are working with iMX27ADS
and managed to repeat these problems in your desktops and VM using Ubuntu 9.04

1-) Stripping

The strip option is not working with me. I've built the jffs2 image
and mounted it using these procedures :

mkdir $dir
modprobe mtdram total_size=102400 erase_size=128
modprobe mtdblock
dd if=jffs2.img of=/dev/mtdblock0
mount -t jffs2 /dev/mtdblock0 $dir


Checking if the libs are stripped


file $dir/lib* | grep -i strip

libanl-2.5.so:          ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libblkid.so.1.0:        ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped
libBrokenLocale-2.5.so: ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libc-2.5.so:            ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libcom_err.so.2.1:      ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped
libcrypt-2.5.so:        ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libdl-2.5.so:           ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libe2p.so.2.3:          ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped
libext2fs.so.2.4:       ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped
libgcc_s.so.1:          ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped
libm-2.5.so:            ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libmemusage.so:         ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libnsl-2.5.so:          ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libnss_compat-2.5.so:   ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libnss_dns-2.5.so:      ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libnss_files-2.5.so:    ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libnss_hesiod-2.5.so:   ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libnss_nis-2.5.so:      ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libnss_nisplus-2.5.so:  ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libpcprofile.so:        ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libpthread-2.5.so:      ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libresolv-2.5.so:       ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
librt-2.5.so:           ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libSegFault.so:         ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libss.so.2.0:           ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped
libstdc++.so.6.0.8:     ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped
libtermcap.so.2.0.8:    ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, stripped
libthread_db-1.0.so:    ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libutil-2.5.so:         ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.14,
not stripped
libuuid.so.1.2:         ELF 32-bit LSB shared object, ARM, version 1
(SYSV), dynamically linked, not stripped


2-) Allocate extra space (Kbytes)

This acts in an odd way, my image is about 11M;

address@hidden:/home/ltib.9$ ls -lah rootfs.jffs2
-rw-r--r-- 1 hamilton hamilton 11M 2009-08-04 11:29 rootfs.jffs2

When I ask ltib to allocate 1 extra kbyte ( (1) Allocate extra space
(Kbytes) ) the final image goes to 43 M

address@hidden:/home/ltib.9$ ls -lah rootfs.jffs2
-rw-r--r-- 1 hamilton hamilton 43M 2009-08-04 11:37 rootfs.jffs2


3-) Write support to NOR.

To add RW support in nor.rootfs we had to modify the vi
arch/arm/mach-mx27/mx27ads.c

        {
         .name = "nor.rootfs",
         .size = 12 * 1024 * 1024,
         .offset = MTDPART_OFS_APPEND,
         .mask_flags = MTD_WRITEABLE},

To be able to write the nor.rootfs, the block changes to:

        {
         .name = "nor.rootfs",
         .size = 12 * 1024 * 1024,
         .offset = MTDPART_OFS_APPEND},


The MTD_WRITEABLE sets partition to RO, I've found the same code for
other boards,
I would be grateful if someone else verify this.

Thanks in advance

-- 
Hamilton Vera
int Administrator (char Network[],char ComputationalSystems[])
http://hvera.wordpress.com