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List:       kde-devel
Subject:    Re: Faster startups by fixing C++ object files before linking ( 30-50% faster startups )
From:       Konrad Wojas <wojas () vvtp ! nl>
Date:       2001-07-27 20:14:43
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On Sat, Jul 28, 2001 at 03:34:32PM -0400, Ian Reinhart Geiser wrote:
> On Thursday 26 July 2001 06:01 pm, Leon Bottou wrote:
> > Reading Waldo Bastian's text on C++ shared libraires gave me some ideas.
> > Eventually I spent a few nights trying them.
> >
> > The proposed scheme modifies the object files before linking
> > in a way that reduces the number of expensive relocations.
> > Startup times are reduced by 30 to 50%.
> 
> Hrm, if I read your code correctly this is only for the intel processor?
> I have a PPC and after I run object prelink on it I get segfaults...
> 
> I am looking to see if  I am doing something wrong, but just to make sure, I 
> am wondering is this a portable solution?  Also will this work on my True64 
> box with Compaq's C++ compiler?

from objprelink.c:

/* ---------------- MACHINE DEPENDENT PART ---- */
 
 static char stub[] = {
   0xb8, 0, 0, 0, 0,               /* mov $0,%eax */
   0xff, 0xe0                      /* jmp *(%eax) */
};

So unless your ppc cpu understands intel machine code... ;-)

Regards,
-- 
Konrad Wojas                          .~.
~  wojas@vvtp.nl                     / V \
~  http://wojas.vvtp.nl             /(   )\
:wq                                   ^ ^

 
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