"Maciej W. Rozycki" <macro@ds2.pg.gda.pl> writes: > Where did you get extraneous registers for the i386 > from (especially given the usual register shortage there)? %gs > Maybe we could use the same approach for MIPS. I doubt it. > Where to look for the code in glibc in a current snapshot? %gs is used for a long time linuxthreads/sysdeps/386/useldt.h > One possible approach is to reserve GOT entries for thread registers. > While not as fast as CPU's registers, if frequently accessed they would > stick in the cache. Since the ABI mandates the code to keep a pointer to > the GOT in the gp register, accesses to got entries need only a single > instruction. I haven't thought on it much -- someone might have a better > idea. How would you have different values for different threads? It would mean having multiple GOTs which is a resource waste and a nightmare in resource management. -- ---------------. ,-. 1325 Chesapeake Terrace Ulrich Drepper \ ,-------------------' \ Sunnyvale, CA 94089 USA Red Hat `--' drepper at redhat.com `------------------------
