Busybox 'depmod' broken

April 13, 2011 — BarryK

Oh %#@!, I built what I thought was going to be Quirky 1.5-beta1, but found at bootup that some kernel modules had not loaded.

I found the reason: executing "busybox depmod" only generates one file:
/lib/modules/2.6.32.28/modules.dep.bb
This breaks the full modutils utilities, also breaks some scripts.

The file modules.dep.bb is explained here:
http://git.busybox.net/busybox/tree/modutils/Config.in?h=1_15_stable&=switch

However, the configuration that I used for Busybox 1.18.4:

CONFIG_MODINFO=y

# CONFIG_MODPROBE_SMALL is not set

# CONFIG_FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE is not set

# CONFIG_FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED is not set

CONFIG_INSMOD=y

CONFIG_RMMOD=y

CONFIG_LSMOD=y

CONFIG_FEATURE_LSMOD_PRETTY_2_6_OUTPUT=y

CONFIG_MODPROBE=y

CONFIG_FEATURE_MODPROBE_BLACKLIST=y

CONFIG_DEPMOD=y



#

# Options common to multiple modutils

#

# CONFIG_FEATURE_2_4_MODULES is not set

# CONFIG_FEATURE_INSMOD_TRY_MMAP is not set

# CONFIG_FEATURE_INSMOD_VERSION_CHECKING is not set

# CONFIG_FEATURE_INSMOD_KSYMOOPS_SYMBOLS is not set

# CONFIG_FEATURE_INSMOD_LOADINKMEM is not set

# CONFIG_FEATURE_INSMOD_LOAD_MAP is not set

# CONFIG_FEATURE_INSMOD_LOAD_MAP_FULL is not set

CONFIG_FEATURE_CHECK_TAINTED_MODULE=y

CONFIG_FEATURE_MODUTILS_ALIAS=y

CONFIG_FEATURE_MODUTILS_SYMBOLS=y

CONFIG_DEFAULT_MODULES_DIR="/lib/modules"

CONFIG_DEFAULT_DEPMOD_FILE="modules.dep"

I did NOT choose the small model for modutils!

Sigh, oh well, I have rolled back to Busybox 1.16.2, which does generate modules.dep, modules.alias and modules.symbols.

See my earlier blog post about upgrading to Busybox 1.18.4:
http://bkhome.org/archive/blog2/201104/dialog-11-20110302-busybox-1184.html

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Tags: quirky