Hello, This (https://github.com/sartura/ebpf-core-sample) is the code I'm using. But I add " #define BPF_NO_GLOBAL_DATA 1 " on 'hello.bpf.c' so that Debian 10 is able to execute it. Compiled on default Debian11 amd64 environment with clang package installed from mirror source. Both 'hello' and 'maps' used to work on Debian10 about a month ago. But 'hello' now can't. I'd like to improve this result. ----------------------------------------------------------------------------------------- This is how I compiled them in steps: # bpftool btf dump file /sys/kernel/btf/vmlinux format c > vmlinux.h # clang -g -O2 -target bpf -D__TARGET_ARCH_x86_64 -I . -c hello.bpf.c -o # hello.bpf.o # bpftool gen skeleton hello.bpf.o > hello.skel.h # clang -g -O2 -Wall -I . -c hello.c -o hello.o # git clone https://github.com/libbpf/libbpf # cd libbpf/src # make BUILD_STATIC_ONLY=1 OBJDIR=../build/libbpf DESTDIR=../build INCLUDEDIR= LIBDIR= UAPIDIR= install # cd ../../ # clang -Wall -O2 -g hello.o libbpf/build/libbpf.a -lelf -lz -o hello There was only one warning message: "libbpf: elf: skipping unrecognized data section(4) .rodata.str1.1", which appeared during the generation of 'hello.skel.h'. There are no other warning and error messages during this whole 'hello' and 'maps' compilation. ------------------------------------------------------------------------------------------------------------------- Result of executing 'hello' on default amd64 Debian10 environment: libbpf: kernel doesn't support global data libbpf: failed to load object 'hello_bpf' libbpf: failed to load BPF skeleton 'hello_bpf': -95 failed to load BPF object -95 ------------------------------------------------------------------------------------------------------------------- >From what I can remember, That warning message used to appear even when I'm executing 'hello' on Debian10. But the BPF program work just fine then. Maybe there is something else I can do? Sincerely, Poony.
