Messages in this thread | | | From | "Amit S. Kale" <> | Subject | Re: [Kgdb-bugreport] [PATCH][2/3] Update CVS KGDB's have kgdb_{schedule,process}_breakpoint | Date | Tue, 16 Mar 2004 20:34:24 +0530 |
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On Tuesday 16 Mar 2004 6:32 pm, La Monte H.P. Yarroll wrote: > Amit S. Kale wrote: > >On Tuesday 16 Mar 2004 1:22 am, George Anzinger wrote: > >>Amit S. Kale wrote: > >>>On Friday 12 Mar 2004 1:33 pm, George Anzinger wrote: > >>>>Amit S. Kale wrote: > >>>>>On Friday 12 Mar 2004 2:58 am, George Anzinger wrote: > >>>>>>Amit S. Kale wrote: > >>>>>>~ > >>>>>> > >>>>>>>>context any > >>>>>>>> > >>>>>>>>p fun() > >>>>>>> > >>>>>>>p fun() will push arguments on stack over the place where irq > >>>>>>> occured, which is exactly how it'll run. > >>>>>> > >>>>>>Is this capability in kgdb lite? It was one of the last things I > >>>>>> added to -mm version. > >>>>> > >>>>>No! It's not present in kgdb heavy also. All you can do is set $pc, > >>>>>continue. > >>>> > >>>>Possibly I can help here. I did it for the mm version. It does > >>>> require a couple of asm bits and it sort of messes up the set/fetch > >>>> memory, but it does do the job. > >>> > >>>I have seen that. It's too messy! > >> > >>You have a better solution? > > > >Nope. > > > >I think this feature is very likely to be abused by programmers. They do > >deserve suffering if they choose to shoot at their own feet. > > > >Kernel programmers have to be aware of implementation of this feature if > > they choose to call arbitrary functions. This includes knowing whether > > interrupts are disabled, handling of exceptions in gdb called functions, > > whether other processors run, that breakpoints are disabled. Given that > > kgdb is used for learning the kernel, such features are best kept aside. > > > >-Amit > > Pardon my question. I've lost track of the thread and the available > context doesn't really help me. > > Is this the ability to step into an arbitrary function from the gdb command > line or something else?
This is ability to call arbitray function from gdb command line. Example (gdb) p myfunction(1,2,3) -Amit
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