Messages in this thread |  | | Date | Fri, 30 Nov 2001 19:37:23 +0100 | From | Martin Dalecki <> | Subject | Re: Generating a function call trace |
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Davide Libenzi wrote: > > On Fri, 30 Nov 2001, Brian Gerst wrote: > > > Davide Libenzi wrote: > > > > > > On Fri, 30 Nov 2001, Simon Turvey wrote: > > > > > > > Is it possible to arbitrarily generate (in a module say) a function call > > > > trace? > > > > > > gcc has builtin macros to trace back or ( on x86 ) you can simply chain > > > through %esp/%ebp > > > > That only works if you compile with frame pointers, which the kernel > > turns off for performance reasons (due to register pressure on the x86). > > I thought it was a general question not a kernel code one. > Sure -fomit-frame-pointer is on inside the kernel.
With the , well exception, of the scheduler, which does the task switching by overwriting his own return address on the stack by the address of the next jump point in a process, and needs the frame pointer therefore ;-). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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