[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [Patch][0/2]implement dump_execution_state() on ia64
On 27/3/08 16:56, "Akio Takebe" <takebe_akio@xxxxxxxxxxxxxx> wrote: >> Can you carefully explain why the interface changes are required? >> > IA64 needs unwind infomation to show the Calltrace. > To make the unwind infomation, we needs switch stack and pt_regs. > So if possible, I want to use pt_regs at geting a interrupt. > > I make many interface change because debug-key use IPI. > But I just want to use pt_regs. There is already a function which does what you want (i.e., takes a cpu_user_regs pointer) -- it's called show_execution_state(). On x86 we implement dump_execution_state() by forcing an exception (by executing an invalid opcode) and dumping the calltrace from within the exception handler. This works because the exception handler has a cpu_user_regs pointer and hence can call show_execution_state(). We use the same trick for handling BUG() and ASSERT(). The code concerned is in arch/x86/traps.c:do_invalid_op(). Can a similar thing be done on ia64? -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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