Re: Elf loader crash while zero-filling .bss

From: Abel Bernabeu
Date: Fri Feb 08 2008 - 11:15:24 EST


2008/1/31, Abel Bernabeu <abelbg@xxxxxxxxx>:
> 2008/1/30, Abel Bernabeu <abelbg@xxxxxxxxx>:
>
> > Now I am trying to execute some bigger C applications: in instance
> > BusyBox. I've chosen the buildroot package in order to produce a small
> > "distro".
> >
> > Then I've tried to boot the system using init=/bin/sh but I am getting
> > a crash while loading this non-toy binary.

Hi guys,

Excuse me for posting even another message about the same crash (I am
responding myself anyway :). It is my crash and I will find why
happens! :D

I've found THE COMMON DENOMINATOR present in all the binaries that get
my kernel crash.

The offset of some sections fall in the middle of the .bss section. In
instance, look at the sections 12 (.comment) and 13 (.ARM.atributes).
Both sections are overlapping with 11 (.bss):

[11] .bss NOBITS 0001143c 00143c 000048 0 WA 0 0 4
[12] .comment PROGBITS 00000000 00143c 000094 0 0 0 1
[13] .ARM.attributes SHT_LOPROC+3 00000000 0014d0 000010 0 0 0 1
[14] .shstrtab STRTAB 00000000 0014e0 00007b 0 0 0 1
[15] .symtab SYMTAB 00000000 001804 000c70 16 16 92 4
[16] .strtab STRTAB 00000000 002474 000840 0 0 0 1

Is this fact meaningful??

I don't think this .elf file is correct and you can blame my
cross-compiler building skills... but the kernel should be friendly
enough to tell me about the problem instead of crashing :)

Any ideas?

Yours, Abel.
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