First at the hardware level: AMD64 has a few mode, among them pure 64-bit, pure 32bit, mixed 64-32-bit, and etc. So theoretically at the assembly level, u can still run 32bit assembly a 64-bit CPU. 2nd, at the software level (essentially: it is possible to run 32bit in 64bit environment.....done by the different distros as below): http://www.redhat.com/magazine/009jul05/features/multilib/ http://www.debian-administration.org/articles/534 http://www-uxsup.csx.cam.ac.uk/pub/doc/suse/suse9.2/suselinux-adminguide_en/ch06.html http://www.scribd.com/doc/363677/Benchmarks-AMD64-in-32bit-mode-vs-64bit-mode-Ubuntu https://help.ubuntu.com/community/32bit_and_64bit How all these work (*I think*) is basically having a 64-bit shell (windows is called WOW64 http://en.wikipedia.org/wiki/WOW64) that can switch to 32 bit mode to run the program, and therefore everything inside that process are running at 32bit, and vice versa. Some binary-only applications (like Flash) may not have 64-bit version, and therefore the browser have to be 32bit. But all kernel modules/kernel development (*I think*) must be done in a 64bit environment....unless there exists a 32bit kernel wrapper in 64bit kernel which i am not aware of. I suspect I may have misunderstood u...in view of what is written above please elaborate your requirements???? On Tue, May 6, 2008 at 2:14 AM, tejas khatiwala <socretez@xxxxxxxxx> wrote: > Hello, > > This is not exactly relevant to Linux kernel but I'm gonna ask any way. > > Is there any way I can modify a 64-bit ELF object file to make it look like > 32-bit ELF object file and link it (using `ld`) with 32-bit ELF file? > > I tried libelf but was unsuccessful. I had this pretty link > http://people.freebsd.org/~jkoshy/download/libelf/article.html from Freebsd > website and it seems like the libelf library on Freebsd system is not > similar to that on Linux system as it complained for "vis.h" headerfile and > few library calls such as `elf_setshstrndx()` > > Any suggestions? > > Thanks :-) > > /tejas > -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
