On Thu, Feb 14, 2013 at 08:52:10AM -0800, Steve deRosier wrote: > Hi Larry, > > On Fri, Feb 8, 2013 at 4:11 PM, Larry Baker <ba...@usgs.gov> wrote: > > Steve, > > > > I found this at > > http://gcc.gnu.org/onlinedocs/gcc-4.5.4/gcc/M680x0-Options.html. I don't > > know if gcc 4.3.2 has this option, but it's worth a try. Maybe you only > > have to use this in certain routines? Maybe not, if there is just one GOT > > for the entire program. Other google hits for "relocation truncated to fit: > > R_68K_GOT16O" said to remove XIP options or shared library, like -msep-data. > > I'm not sure that is possible on a ColdFire. I noticed you are using -O1. > > Did you try -Os? My ColdFire distribution uses -Os. > > Yes, my research came up with the -mxgot option also. Tried that and > came up with a problem where the elf2flt doesn't like the larger GOT > format. Aparently it's a problem my client has been fighting with for > a long time and I was able to define out a log statement and that > killed enough strings (5,000 log strings!) in the project to get it to > build. Basically I was told: "Get it to build and we'll deal with the > problem over here." Done. > > -Os helped some also, but not with the GOT issue. But size-wise it > helped. Upgrading to Linux 3.2 from 2.4 (and the other apps) has > increased our total image size by nearly 50% and we're starting to > bump into size issues. I'm having to kill off some useful technician > and debugging utilities now.
Some years ago, I have written and submitted, but not pushed hard enough, a patch to gcc for m68k permitting to generate an absolute text segment with only a GOT table for the data and bss segments. Of course you must know the load address at link-time, but that's doable if you do XIP. This was combined with a patch to genromfs providing the load address to the linker when generating the romfs image. This way I had an unique absolute text segment for busybox with a small GOT table. This must be still floating around Hope that helps Philippe -- Philippe De Muyter +32 2 6101532 Macq SA rue de l'Aeronef 2 B-1140 Bruxelles _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
