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Re: Force production of ELF hash table

On Sun, Apr 21, 2013 at 6:28 AM, John Cronin <> wrote:
> I am using ld to link an OS kernel.  The kernel produced is a statically
> linked executable file but supports dynamic modules.  I would like to use
> the hash table functionality of ELF files to quickly look up symbols within
> the statically linked kernel file for dynamically loading the modules
> however cannot work out how to ask ld to add the hash table to non-shared
> outputs.  Is it possible?  I see from
> that
> the embedded linux guys have had to write their own tool (ksymhash) to
> modify the vmlinux image after linking but I was wondering whether there was
> a way to ask ld to do it for me.  I am using the x86_64-elf target.

There is currently no support for that in either GNU ld or gold.  It
would not be enough to simply write out the hash table; you could also
have to provide some way for the program to find it at runtime, since
it would not be able to use the usual dynamic tag mechanism.


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