On Sat, 5 Feb 2005, Yan Yu wrote: > I am wondering if there is a way to use kernel loadable module to > replace the original falloc() (kern/kern_descrip.c) in the system. I > know how to do this if the funciton to be replaced is some system call > function or ufs* operatio ( i could just change the symbol table which > holds these function pointers),. but i could not find the symbol table > which holds the falloc() function pointer...
falloc() isn't considered a "pluggable" kernel API, that is to say, we've not engineered FreeBSD with the intent that it be replaced at run-time. As such, to get falloc() replaced on your out-of-the-box FreeBSD install, you'll need to modify the kernel linking. falloc is non-static, so it should be an exported symbol from kern_descrip.o and in theory exposed to modules -- however, replugging the current reference in kern_descript.o might be the hard one to modify. If you don't mind my asking, what motivates you to replace falloc()? Robert N M Watson _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
