Re: FPE in ld-linux-x86-64.so loading custom extension

On 4/11/08, Antony Dovgal <tony@daylessday.org> wrote: > On 10.04.2008 21:19, Michael B Allen wrote: > > > Can anyone recommend a method for debugging this issue? > > > > I'd start with --enable-debug and valgrind. > > > > It seems to be this one particular server. I have not been able to > > reproduce the issue here. > > > > What's the difference between this server and the others? > Do the others use different Apache version/build? > Other architecture maybe? LD version? Actually it looks like this does have to do with the LD version and specifically the .hash vs .hash.gnu section in the binaries. I was building x86_64 binaries on a machine that only used the newer .hash.gnu section (contrary to the man page which claims sysv style is the default). I suspect that the client is using an older system who's loader only supports the traditional sysv style .hash section. It seems the solution is to use -Wl,--hash-style=both so that the dso and library it's linked with have both the .hash and .hash.gnu sections (confirmed with objdump -h foo.so). But I'm waiting to hear back from the client for the verdict. I'll post a followup. Mike -- Michael B Allen PHP Active Directory SPNEGO SSO http://www.ioplex.com/