On Mon, 2006-07-10 at 04:14 -0700, Tim Prince wrote: > David Fernandez wrote: > > Hi there, > > > > Could anyone there tell which segment registers does the compiler use > > (CS, DS, ES, FS, GS), or if it doesn't use any at all and rely on the > > default segments all the time? > > > > Is there any way to tell it that a specific variable resides, or is > > addressable only through a specific segment register? > > > As only you know enough details about your compiler, > application,platform, operating system, etc, > you should consider generating .s code or using objdump -S to answer these > questions yourself. > Ooops, sorry for the lack of details... I'm using gcc: > [root@software ~]# gcc -v > Using built-in specs. > Target: i386-redhat-linux > Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-libgcj-multifile --enable-languages=c,c++,objc,java,f95,ada --enable-java-awt=gtk --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --host=i386-redhat-linux > Thread model: posix > gcc version 4.0.2 20051125 (Red Hat 4.0.2-8) running under Fedora Core 4 (the gcc that comes with it). I haven't seen any reference to segment registers so far, but I haven't tries every kind of program under gcc. ... And I was just wondering if some-(gcc developer, perhaps)-one knows about that. David.
