This isn't possible today, but it's an RFE that has existed for quite awhile. Take a look at this old mail thread:
http://opensolaris.org/jive/thread.jspa?messageID=36261趥 - ahl On Feb 18, 2008, at 7:48 PM, Perry The Cynic wrote: > (This question is about the Mac OS X version of dtrace, but I'm told > they don't do anything special there.) > > I can use copyout() to modify the program's memory (with -w) and > thus patch up errant functions' memory in user space. But what if I > need to patch a function's return value, or its arguments? Arg0 etc. > are read-only ("operator = can only be applied to a writable > variable"), so I can't assign to them. The same appears to apply to > uregs[]. That seems to severely restrict the kinds of interventions > I am allowed, particularly on register-based architectures. > > Cheers > -- perry > > > -- > This message posted from opensolaris.org > _______________________________________________ > dtrace-discuss mailing list > [email protected] -- Adam Leventhal, Fishworks http://blogs.sun.com/ahl _______________________________________________ dtrace-discuss mailing list [email protected]
