On Thu, Jun 1, 2017 at 7:45 AM, Adel Fuchs via iovisor-dev <iovisor-dev@xxxxxxxxxxxxxxxxx> wrote: > Hi Jesper, > > Thank you so much for your help. I need to run an eBPF programs that > filters packets according to IP address or port. I'm trying to run the > prototype-kernel package but encounter problems. > I went over the "getting started" tutorial, but I couldn'f find a > tutorial which explains how to actually run the samples. So this is > what I did: > > clang -O2 -Wall -target bpf -c xdp_ddos01_blacklist_cmdline.c -o > xdp_ddos01_blacklist_cmdline Just looked at the code. This seems a control plane application. You should not compile with "-target bpf". You should just use the default host one if you are intending to run on that host. You can also use gcc here. Yonghong > > First, I got an error saying: > ./libbpf.h:12:10: fatal error: 'bpf/bpf.h' file not found > #include <bpf/bpf.h> > > So I added it manually. Then I got this big error: > > fatal error: error in backend: Cannot select: 0x562f4957d270: ch,glue > = BPFISD::CALL 0x562f49581238, > TargetExternalSymbol:i64'__divdf3', Register:i64 %R1, > Register:i64 %R2, 0x562f49581238:1 > 0x562f49580bb8: i64 = TargetExternalSymbol'__divdf3' > 0x562f4957d618: i64 = Register %R1 > 0x562f49581510: i64 = Register %R2 > 0x562f49581238: ch,glue = CopyToReg 0x562f495816b0, Register:i64 > %R2, 0x562f49580f60, 0x562f495816b0:1 > 0x562f49581510: i64 = Register %R2 > 0x562f49580f60: i64,ch,glue = CopyFromReg 0x562f49581578, > Register:i64 %R0, 0x562f49581578:1 > 0x562f4957da90: i64 = Register %R0 > 0x562f49581578: ch,glue = callseq_end 0x562f4957db60, > TargetConstant:i64<0>, TargetConstant:i64<0>, 0x562f4957db60:1 > 0x562f4957d6e8: i64 = TargetConstant<0> > 0x562f4957d6e8: i64 = TargetConstant<0> > 0x562f4957db60: ch,glue = BPFISD::CALL 0x562f4957d750, > TargetExternalSymbol:i64'__divdf3', Register:i64 %R1, Register:i64 > %R2, 0x562f4957d750:1 > 0x562f49580bb8: i64 = TargetExternalSymbol'__divdf3' > 0x562f4957d618: i64 = Register %R1 > 0x562f49581510: i64 = Register %R2 > 0x562f4957d750: ch,glue = CopyToReg 0x562f49581648, > Register:i64 %R2, Constant:i64<4741671816366391296>, 0x562f49581648:1 > 0x562f49581510: i64 = Register %R2 > 0x562f49580ef8: i64 = Constant<4741671816366391296> > 0x562f49581648: ch,glue = CopyToReg 0x562f495808e0, > Register:i64 %R1, 0x562f4957d478 > 0x562f4957d618: i64 = Register %R1 > 0x562f4957d478: i64,ch,glue = CopyFromReg > 0x562f49581370, Register:i64 %R0, 0x562f49581370:1 > 0x562f4957da90: i64 = Register %R0 > 0x562f49581370: ch,glue = callseq_end 0x562f49580c88, > TargetConstant:i64<0>, TargetConstant:i64<0>, 0x562f49580c88:1 > 0x562f4957d6e8: i64 = TargetConstant<0> > 0x562f4957d6e8: i64 = TargetConstant<0> > 0x562f49580c88: ch,glue = BPFISD::CALL > 0x562f49581030, TargetExternalSymbol:i64'__floatundidf', Register:i64 > %R1, 0x562f49581030:1 > > > > 0x562f495816b0: ch,glue = CopyToReg 0x562f4957dd00, Register:i64 > %R1, 0x562f4957dd68 > 0x562f4957d618: i64 = Register %R1 > 0x562f4957dd68: i64,ch,glue = CopyFromReg 0x562f4957d7b8, > Register:i64 %R0, 0x562f4957d7b8:1 > 0x562f4957da90: i64 = Register %R0 > 0x562f4957d7b8: ch,glue = callseq_end 0x562f49580e28, > TargetConstant:i64<0>, TargetConstant:i64<0>, 0x562f49580e28:1 > 0x562f4957d6e8: i64 = TargetConstant<0> > 0x562f4957d6e8: i64 = TargetConstant<0> > 0x562f49580e28: ch,glue = BPFISD::CALL 0x562f4957da28, > TargetExternalSymbol:i64'__floatundidf', Register:i64 %R1, > 0x562f4957da28:1 > 0x562f4957d410: i64 = TargetExternalSymbol'__floatundidf' > 0x562f4957d618: i64 = Register %R1 > 0x562f4957da28: ch,glue = CopyToReg 0x562f49580e90, > Register:i64 %R1, 0x562f4957d680 > 0x562f4957d618: i64 = Register %R1 > 0x562f4957d680: i64 = sub 0x562f49580a80, 0x562f49580dc0 > 0x562f49580a80: i64,ch = CopyFromReg 0x562f494f79b0, > Register:i64 %vreg50 > 0x562f49581718: i64 = Register %vreg50 > 0x562f49580dc0: i64,ch = CopyFromReg 0x562f494f79b0, > Register:i64 %vreg48 > 0x562f49581440: i64 = Register %vreg48 > In function: main > clang: error: clang frontend command failed with exit code 70 (use -v > to see invocation) > clang version 4.0.0-1ubuntu1 (tags/RELEASE_400/rc1) > Target: bpf > Thread model: posix > InstalledDir: /usr/bin > clang: note: diagnostic msg: PLEASE submit a bug report to > http://llvm.org/bugs/ and include the crash backtrace, preprocessed > source, and associated run script. > clang: note: diagnostic msg: > ******************** > > PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT: > Preprocessed source(s) and associated run script(s) are located at: > clang: note: diagnostic msg: /tmp/xdp_ddos01_blacklist_cmdline-80c621.c > clang: note: diagnostic msg: /tmp/xdp_ddos01_blacklist_cmdline-80c621.sh > clang: note: diagnostic msg: > > ******************** > > Could you please help me run these samples? Could you please guide me > to the right sample that I need and tell me how to run it? > Note that I was able to run a simple XDP program on this computer, so > I think that it is configured all right... > > Thanks a lot > Adel > > _______________________________________________ > iovisor-dev mailing list > iovisor-dev@xxxxxxxxxxxxxxxxx > https://lists.iovisor.org/mailman/listinfo/iovisor-dev >
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