On Sun, Feb 12, 2023 at 12:14:01AM +0200, Laurent Pinchart wrote: > clang may come with stack protector enabled by default, which caused > compilation errors for BPF programs: > > FAILED: utils/keytable/bpf_protocols/grundig.o > /usr/lib/llvm/15/bin/clang -idirafter /usr/lib/llvm/15/bin/../../../../lib/clang/15.0.6/include -idirafter /usr/local/include -idirafter /usr/include -D__linux__ -target bpf -O2 -c ../../utils/keytable/bpf_protocols/grundig.c -o utils/keytable/bpf_protocols/grundig.o > ../../utils/keytable/bpf_protocols/grundig.c:50:5: error: A call to built-in function '__stack_chk_fail' is not supported. > int bpf_decoder(unsigned int *sample) > ^ > 1 error generated. > > Disable the stack protector to fix this, as recommended in [1]. > > [1] https://www.spinics.net/lists/netdev/msg556400.html Looks good, applied. I could not reproduce the problem, but the -fno-stack-protector cli option has been supported for a very long time, and stack protection does not make sense in a BPF context. Thanks, Sean > > Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > utils/keytable/bpf_protocols/Makefile.am | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/utils/keytable/bpf_protocols/Makefile.am b/utils/keytable/bpf_protocols/Makefile.am > index 13be2794791b..6096c0de5813 100644 > --- a/utils/keytable/bpf_protocols/Makefile.am > +++ b/utils/keytable/bpf_protocols/Makefile.am > @@ -8,7 +8,7 @@ CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \ > | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') > > %.o: %.c bpf_helpers.h > - $(CLANG) $(CLANG_SYS_INCLUDES) -D__linux__ -I$(top_srcdir)/include -target bpf -O2 -c $< > + $(CLANG) $(CLANG_SYS_INCLUDES) -D__linux__ -I$(top_srcdir)/include -target bpf -fno-stack-protector -O2 -c $< > > PROTOCOLS = grundig.o pulse_distance.o pulse_length.o rc_mm.o manchester.o xbox-dvd.o imon_rsc.o raw.o samsung36.o > > -- > Regards, > > Laurent Pinchart
