On Fri, Jun 30, 2017 at 08:23:36AM -0500, Josh Poimboeuf wrote: > On Fri, Jun 30, 2017 at 10:32:03AM +0200, Ingo Molnar wrote: > > > > * Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > > > > > This is a major rewrite of objtool. Instead of only tracking frame > > > pointer changes, it now tracks all stack-related operations, including > > > all register saves/restores. > > > > > > In addition to making stack validation more robust, this also paves the > > > way for undwarf generation. > > > > > > Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> > > > > Note, I have applied the first 3 patches, and got a bunch of new warnings on x86 > > 64-bit allmodconfig: > > > > arch/x86/kernel/alternative.o: warning: objtool: do_sync_core()+0x1b: unsupported instruction in callable function > > arch/x86/kernel/alternative.o: warning: objtool: text_poke()+0x1a8: unsupported instruction in callable function > > arch/x86/kernel/ftrace.o: warning: objtool: do_sync_core()+0x16: unsupported instruction in callable function > > arch/x86/kernel/cpu/mcheck/mce.o: warning: objtool: machine_check_poll()+0x166: unsupported instruction in callable function > > arch/x86/kernel/cpu/mcheck/mce.o: warning: objtool: do_machine_check()+0x147: unsupported instruction in callable function > > > > (That's the vmlinux build - plus 4 more warnings in the modules build.) > > > > That's with GCC 5.3.1. > > > > Let me know if you need any more info. > > Hm, this is odd. I tried with GCC 5.3.0 (which should presumably be > almost identical to 5.3.1) and I don't see any warnings. Can you send > me one of the object files it's complaining about? Oh wait, never mind. Now that I'm actually reading the warnings, it makes sense. Those are warnings I fixed in a later patch in the series. I'll try to come up with something to fix those without pulling in the rest of the patches. -- Josh -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
