On Thu, Sep 22, 2011 at 12:06:46PM +0100, Jon Medhurst (Tixy) wrote: > On Thu, 2011-09-22 at 10:48 +0100, Catalin Marinas wrote: > > We could improve things a bit in the unwinder and assume > > that if the fault address is the same as the .fnstart address, the > > return value is always in LR and the SP not affected (that's unwinding > > bytecode 0xb0). For a few instructions into the function prologue we > > can't reliably get the unwinding information. > > That would help make it possible to unwind out of kprobes handlers to > the probed function. The kprobes code itself would need work as well, > and possibly the undef handler. Do we think it is worthwhile to do > this? Does kprobes need to trace beyond the probed function? If not, you get the address of the probed function via pt_regs anyway, so no need for unwinding beyond that. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
