Re: [RFC][PATCH] linux-2.6.4-pre1_vsyscall-gtod_B3-part3 (3/3)

[john stultz]

On Thu, 2004-03-04 at 00:09, Ulrich Drepper wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> john stultz wrote:
> 
> > Before we start up this larger debate again, might there be some short
> > term solution for my patch that would satisfy both of you?
> 
> I suggest the following:
> 
> ~ define a symbol __kernel_gettimeofday_offset in the vdso's symbol
> table.  This should be an absolute symbol containing the offset of the
> gettimeofday implementation from the beginning of the vdso (the address
> passed up in the auxiliary vector)
> 
> ~ glibc can then use the equivalent of
> dlsym("__kernel_gettimeofday_offset").  If the symbol is not defined,
> it's not used (doh).  If it is defined, the final function address is
> computed by adding the offset to the vdso address.
> 
> 
> This ensures a direct jump and it still keeps the vdso relocatable
> without modifying the symbol table.

Excellent, this sounds similar to what Andrea was suggesting. 
I'll start working to implement this.

thanks for the momentary truce ;)
-john

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/