Hi, I'm adding parser and extra map lookup into the xdp1_kern.c and encounter this LLVM error. My environment: clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final) LLVM version 4.0.0svn
I think it might be related to bpf map access, if I comment out the map access code, then the problem goes away. Looking at similar error in bcc, I have no clue about how to debug this issue. https://github.com/iovisor/bcc/issues/220 https://github.com/iovisor/bcc/issues/237 I can share the code if it is more helpful. Any comments are appreciated! $ clang -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/5/include -I./arch/x86/include -I./arch/x86/include/generated/uapi -I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h \ -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \ -Wno-compare-distinct-pointer-types \ -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -O2 -emit-llvm -c /root/net-next/samples/bpf/xdp1_kern.c -o -| llc -march=bpf -filetype=obj -o /root/net-next/samples/bpf/xdp1_kern.o warning: unknown warning option '-Wno-address-of-packed-member' [-Wunknown-warning-option] 1 warning generated. error: couldn't allocate output register for constraint 'r' at line 473618 Thanks William _______________________________________________ iovisor-dev mailing list [email protected] https://lists.iovisor.org/mailman/listinfo/iovisor-dev
