[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v1 10/11] xsplice: Add support for exception tables
On 03.11.2015 19:16, Ross Lagerwall wrote: > +#ifdef CONFIG_X86 > +unsigned long search_module_extables(unsigned long addr) > +{ > + struct payload *data; > + unsigned long ret; > + > + /* No locking since this list is only ever changed during apply or revert > + * context. */ How do you make sure that no exception is triggered in the patching process itself (also for future code changes)? Could we use a lockless update on the list of module ex-tables? > + list_for_each_entry ( data, &applied_list, applied_list ) > + { > + if ( !data->start_ex_table ) > + continue; > + if ( !((void *)addr >= data->module_address && > + (void *)addr < (data->module_address + data->core_text_size))) > + continue; > + > + ret = search_one_extable(data->start_ex_table, data->stop_ex_table - > 1, > + addr); > + if ( ret ) > + return ret; > + } > + > + return 0; > +} > +#endif > + Martin -- Amazon Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrer: Dr. Ralf Herbrich, Christian Schlaeger Ust-ID: DE289237879 Eingetragen am Amtsgericht Charlottenburg HRB 149173 B _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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