GNU_STACK ELF header

[Dr Andrew John Hughes]

On 27 August 2010 16:31, Kelly O'Hair <kelly.ohair at oracle.com> wrote:
> Interesting. Had not heard about this new Elf header.
>
> The Linux systems and gcc compilers used for jdk5 and jdk6 builds is pretty
> old.
>
> 32bit:
> gcc (GCC) 3.2.1-7a (J2SE release)
>
> 64bit:
> gcc (GCC) 3.2.2 (SuSE Linux)
>
> For jdk7, we are using the gcc compiler provided with Fedora 9,  gcc 4.3.0
>
> -kto
>
>
> On Aug 26, 2010, at 11:25 PM, Douglas Simon wrote:
>
>> As a result of stack overflow detection breaking in Maxine on Linux, I
>> learnt about this ELF header. My experience is described here:
>> http://blogs.sun.com/dns/entry/stacks_with_split_personalities
>>
>> Is this issue known in HotSpot/JDK? If so, how exactly is the header being
>> omitted from the HotSpot and JDK libraries and executables?
>>
>> -Doug
>
>

This was discussed last year:
http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2009-August/006995.html
and is patched in IcedTea6 by icedtea-gcc-stack-markings.patch.

GCC 4.3 is the earliest version of GCC IcedTea has been built with, to
my knowledge, rather than the latest.  I'm currently building with GCC
4.5.1.
-- 
Andrew :-)

Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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