On 03/22/2014 08:51 AM, Domingues Luis Filipe wrote: > Hello, > > I'm using dirty-calls on a tool I'm building. And I want to know what's > the limitations of the parameters for dirty-calls (Types, how many...)
The answer depends on the architecture you're using. E.g. for x86-64 you may pass up to 6 arguments; for s390 you may pass up to 5. In general, minimising the number of arguments of a helper call is a good idea because instruction selection will often generate register-to-register moves for the arguments and the register allocator does not do a very good job throwing them out. Take a look at VEX/priv/host_ARCH_isel.c to find out what is allowed for the architecture you have in mind. Search for Ist_Dirty. AFAIK only integer arguments are allowed. Florian ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
