Re: [2.6] binfmt_elf bug (exposed by klibc).

From: Jan-Benedict Glaw
Date: Sat Oct 08 2005 - 09:31:05 EST

On Sat, 2005-10-08 00:42:58 +0200, PaweÅ Sikora <pluto@xxxxxxxx> wrote:
> > Did somebody accidentally
> > screw up some kernel code between 2.6.13 and 2.6.14?
> I think kernel elf loader doesn't handle binaries without .bss.
> Earlier binutils (<2.16) emits zero-sized .data/.bss and problem
> wasn't exposed. Modern binutils doesn't emit useless zero-sized
> .data/.bss sections and kernel kills these binaries.

I had this problem at some time, too. This was when I started to redo
the uClibc port to vax-linux, which I started with a hand-crafted
assembly file. It also crashed upon execution, though I was sure the
program was technically okay.

However, I haven't looked up any paper or standard to verify either
position. So I don't know for *sure* if it's legal to omit these
(empty) sections.


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