Fwd: Elf loader crash while zero-filling .bss

From: Abel Bernabeu
Date: Fri Feb 08 2008 - 13:09:15 EST


---------- Forwarded message ----------
From: Abel Bernabeu <abelbg@xxxxxxxxx>
Date: 08-feb-2008 18:54
Subject: Re: Elf loader crash while zero-filling .bss
To: Andreas Schwab <schwab@xxxxxxx>


2008/2/8, Andreas Schwab <schwab@xxxxxxx>:
> "Abel Bernabeu" <abelbg@xxxxxxxxx> writes:
>
> > 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??
>
> The fifth column is the file offset. Since the .bss section does not
> occupy any file space the other sections can be put directly behind it
> in the file.
>

The standar says literally that sections cannot overlap... but your
interpretation is rigth anyway.

I have a lot of binaries in my host Linux system with some section
overlapping with .bss wich are correctly loaded (so this should not be
the problem).

Well, let's follow searching...

I already tested the filesystem (in order to discard a flash corruption).

Yours, Abel.
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