Messages in this thread | | | Date | Wed, 10 Jan 2018 21:33:52 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] x86/alternatives: Fix optimize_nops() checking |
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On Wed, Jan 10, 2018 at 12:26:25PM -0800, Linus Torvalds wrote: > Imagine just how crazy that would be to debug. You'd be basically > executing insane code, and looking at the sources - or even the > binaries - it would _look_ completely sane.
Been there done that.. we have too much self modifying code for that not to have been needed.
Use gdb on /proc/kcore and disassemble self to see the _real_ code.
But yes, tricky stuff. Not arguing we need relocations in alternatives, just saying debugging them (and static keys and others) is great fun.
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