Thanks, Sherry. It is helpful.
-Brian Sherry Moore ??: > Hi Brian, > > It's all magic. :) > > Please see > http://blogs.sun.com/sherrym/entry/obtaining_function_arguments_on_amd64 > for details. The file that should answer the rest of you questions is > usr/src/cmd/mdb/intel/mdb/mdb_amd64util.c > > Hope that helps, > Sherry > > ----- Forwarded message from Brian Xu - Sun Microsystems - Beijing China > <Brian.Xu at sun.com> ----- > > Date: Tue, 09 Dec 2008 10:32:20 +0800 > From: Brian Xu - Sun Microsystems - Beijing China <Brian.Xu at sun.com> > Subject: [mdb-discuss] A question: how the '::findstack -v' in mdb works? > To: mdb-discuss at opensolaris.org > > Hi, > > I have a question: how the cmd '::findstack -v' in mdb works? > > In x32, it is easy to understand, since all the args are on the stack, > while for amd64, since the args(<6) are not put on the stack, and those > regs used to pass args(rdi, rsi, rdx, rcx, r8, r9) may be reused within > the function, so I am curious when backtracing the stack, how to know > the value of the args passed to the function's father, grandfather, > great grandfather, etc? > > Likewise in sparc, since at any time only the current register window > can be accessed, so if we want to backtrace the stack, we can only > access the fp(i6) and args(i0-i5) of the function's father, and how we > can access those of the grandfather, great grandfather, etc? > > Thanks, > Brian > > _______________________________________________ > mdb-discuss mailing list > mdb-discuss at opensolaris.org > > ----- End forwarded message ----- > >
