Re: port-amd64/43438: x86 module map size is limited

[David Laight <david%l8s.co.uk@localhost>]

The following reply was made to PR port-amd64/43438; it has been noted by GNATS.

From: David Laight <david%l8s.co.uk@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: port-amd64/43438: x86 module map size is limited
Date: Thu, 10 Jun 2010 19:37:48 +0100

 On Wed, Jun 09, 2010 at 08:35:02PM +0000, Nicolas Joly wrote:
 >  >  
 >  >  Do they also have the .ehframe section?
 >  
 >  Yes.
 >  
 >    2 .eh_frame     000115a8  0000000000000000  0000000000000000  000b5988  
 > 2**3
 >                    CONTENTS, ALLOC, LOAD, RELOC, READONLY, DATA
 >  
 >  >  We ought to be removing that (gcc option) for all amd64 kernel bits.
 >  
 >  Ok. The new patch save a few more byte by discarding this section in
 >  modules.
 ...
 >  +.if ${MKDEBUG} != "no"
 >  +KMODDEBUG= mv ${PROG} ${PROG}.gdb && \
 >  +           ${STRIP} --strip-debug --remove-section=.eh_frame \
 >  +               -o ${PROG} ${PROG}.gdb
 
 I'm sure I remember there being symbols in the .eh_frame section that
 get referenced from elsewhere.
 This means (at least for userspace) you can't use objcopy to remove the
 section, but must tell gcc to not generate it.
 
        David
 
 -- 
 David Laight: david%l8s.co.uk@localhost