I looked at your earlier email on the "long long" issue. I think your reasoning is plausible as the division actually refers to external symbols. We will do a test and see what happens.
Cheers. Jun On Thu, Nov 27, 2008 at 12:59:34PM +0800, Lin KJ wrote: > Hi Jun, > > Do you use the toolchains built by yourself? > I use the snapgear pre-compiled ARM toolchain > (arm-linux-tools-20061213.tar.gz). > However, when the program uses the "long long" variable division , it will > fail on "__divid3" of libgcc.a. > The failed reasion is DATA ABORT. > I strongly suspect it is due to the libgcc.a compiling flags without the > "-msingle-pic-base". > Besides the flag reasion, i can not find any other reasions which cause the > "long long" variable devision died on "__divid3". > Any hints? > > Best Regards, > KJ > > > > > ----- 原始信件 ---- > 寄件者： Jun Sun <[EMAIL PROTECTED]> > 收件者： uClinux development list <uclinux-dev@uclinux.org> > 寄件日期： 2008/11/27(星期四) 上午3:00:54 > 主 旨： Re: [uClinux-dev] ARM compiler option "-msingle-pic-base" > > On Thu, Nov 27, 2008 at 02:24:48AM +0800, Lin KJ wrote: > > Hi all, > > > > In the ARM uClinux world, it seems that the user land XIP code should be > > compiled with the "-fpic" and "-msingle-pic-base" flags. > > Why not just "-fpic" flag? > > Is it concern with the elf2flt tool? > > I think it has more to do the loading FLAT executables. FLAT > does not need run-time loader. As a result, relocatable symboles > are only fixed up once by kernel. Single pic base would be much > eaiser to do for this case. > > > I can have the applications and uClibc to be compiled with > > "-msingle-pic-base", > > but how about the libgcc.a? > > Does the libgcc.a have to be produced with the "-msingle-pic-base" too? > > I took a look of what we did. Surprisingly it did get compiled with > this option. A second look reveals that libgcc.a is a bunch of > leaf functions (i.e., they never call or refer other functions/symbols). > So they can link with almost all kinds of code (which makes sense). > > Cheers. > > Jun > _______________________________________________ > 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 > > > > > ______________________________________________________________________________________________________ > 付費才容量無上限？Yahoo!奇摩電子信箱2.0免費給你，信件永遠不必刪！ http://tw.mg0.mail.yahoo.com/dc/landing _______________________________________________ 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
