> From: Jiri Olsa [mailto:jo...@redhat.com] > > On Tue, Sep 01, 2015 at 04:57:16PM -0300, Arnaldo Carvalho de Melo wrote: > > Em Tue, Sep 01, 2015 at 03:16:52PM +0300, Adrian Hunter escreveu: > > > On 01/09/15 11:54, Ingo Molnar wrote: > > > > > > > > * Adrian Hunter <adrian.hun...@intel.com> wrote: > > > > > > > >> Hi > > > >> > > > >> perf tools has a copy of the x86 instruction decoder for decoding > > > >> Intel PT. [...] > > > > > > > > So that's the arch/x86/lib/insn.c instruction length decoder that the > > > > kernel uses > > > > for kprobes et al - and the two versions already forked slightly: > > > > > > > > -#include "inat.h" > > > > -#include "insn.h" > > > > +#include <asm/inat.h> > > > > +#include <asm/insn.h> > > > > > > > > it would be nice to add a diff check to the perf build, and > > > > (non-fatally) warn > > > > during the build if the two versions depart from each other? > > > > > > I had a go and came up with this. Arnaldo, Jiri any comments? > > > > So, I was going to try and merge this series, can you please collect the > > Acks by Masami and Jiri and resubmit? > > > > I'd say no need to stop this just to get a build function to use with > > this, the test below should do the trick _for this specific instance_ > > and then, after we get this, you should use it as the initial usecase > > for adding the build function, d'accord? > > > > Jiri, are you ok with this? > > sure, np you can use my ack
I'm also OK for this patch. I just concern that is OK for Adrian too? Since this ensures all the copied code should be dead copy (not modified anymore), if we want a different instruction decoding routine, we have to break the test anyway. Thank you, > > jirka > > > > > - Arnaldo > > > > > diff --git a/tools/perf/util/intel-pt-decoder/Build > > > b/tools/perf/util/intel-pt-decoder/Build > > > index 240730d682c1..1b8a32de8504 100644 > > > --- a/tools/perf/util/intel-pt-decoder/Build > > > +++ b/tools/perf/util/intel-pt-decoder/Build > > > @@ -6,6 +6,17 @@ inat_tables_maps = > > > util/intel-pt-decoder/x86-opcode-map.txt > > > $(OUTPUT)util/intel-pt-decoder/inat-tables.c: $(inat_tables_script) > > > $(inat_tables_maps) > > > @$(call echo-cmd,gen)$(AWK) -f $(inat_tables_script) > > > $(inat_tables_maps) > $@ || rm -f $@ > > > > > > -$(OUTPUT)util/intel-pt-decoder/intel-pt-insn-decoder.o: > > > util/intel-pt-decoder/inat.c > $(OUTPUT)util/intel-pt-decoder/inat-tables.c > > > +$(OUTPUT)util/intel-pt-decoder/intel-pt-insn-decoder.o: > > > util/intel-pt-decoder/intel-pt-insn-decoder.c > util/intel-pt-decoder/inat.c $(OUTPUT)util/intel-pt-decoder/inat-tables.c > > > + @test -d ../../arch/x86 && (( \ > > > + diff -B -I'^#include' util/intel-pt-decoder/insn.c > > > ../../arch/x86/lib/insn.c >/dev/null && \ > > > + diff -B -I'^#include' util/intel-pt-decoder/inat.c > > > ../../arch/x86/lib/inat.c >/dev/null && \ > > > + diff -B util/intel-pt-decoder/x86-opcode-map.txt > > > ../../arch/x86/lib/x86-opcode-map.txt >/dev/null && \ > > > + diff -B util/intel-pt-decoder/gen-insn-attr-x86.awk > > > ../../arch/x86/tools/gen-insn-attr-x86.awk >/dev/null && \ > > > + diff -B -I'^#include' util/intel-pt-decoder/insn.h > > > ../../arch/x86/include/asm/insn.h >/dev/null && \ > > > + diff -B -I'^#include' util/intel-pt-decoder/inat.h > > > ../../arch/x86/include/asm/inat.h >/dev/null && \ > > > + diff -B -I'^#include' util/intel-pt-decoder/inat_types.h > > > ../../arch/x86/include/asm/inat_types.h >/dev/null) \ > > > + || echo "Warning: Intel PT: x86 instruction decoder differs from > > > kernel" >&2 ) > > > + $(call rule_mkdir) > > > + $(call if_changed_dep,cc_o_c) > > > > > > CFLAGS_intel-pt-insn-decoder.o += -I$(OUTPUT)util/intel-pt-decoder > > > -Wno-override-init > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
