On Wed, May 25, 2022 at 1:10 PM Ye ZhengMao <yezhengmaolove@xxxxxxxxx> wrote: > > i using cross compiler to compile the bpftool for aarch64 and when gen > skeleton for the minimal.bpf.o, bpftool core. > > libbpf: loading object 'minimal_bpf' from buffer > libbpf: elf: section(2) tp/syscalls/sys_enter_write, size 104, link 0, > flags 6, type=1 you should have seen a message about discovering a program here. Can you share that .bpf.o file, somehow libbpf can't find program entry. > libbpf: elf: section(3) license, size 13, link 0, flags 3, type=1 > libbpf: license of minimal_bpf is Dual BSD/GPL > libbpf: elf: section(4) .bss, size 4, link 0, flags 3, type=8 > libbpf: elf: section(5) .rodata, size 28, link 0, flags 2, type=1 > libbpf: elf: section(6) .symtab, size 192, link 8, flags 0, type=2 > libbpf: elf: section(7) .reltp/syscalls/sys_enter_write, size 32, link > 6, flags 0, type=9 > libbpf: looking for externs among 8 symbols... > libbpf: collected 0 externs total > libbpf: map 'minimal_.bss' (global data): at sec_idx 4, offset 0, flags 400. > libbpf: map 0 is "minimal_.bss" > libbpf: map 'minimal_.rodata' (global data): at sec_idx 5, offset 0, flags 480. > libbpf: map 1 is "minimal_.rodata" > libbpf: sec '.reltp/syscalls/sys_enter_write': collecting relocation > for section(2) 'tp/syscalls/sys_enter_write' > libbpf: sec '.reltp/syscalls/sys_enter_write': relo #0: insn #2 against 'my_pid' > Segmentation fault (core dumped) > > core in function find_prog_by_sec_insn > > i using gdb to found the obj->nr_programs == 0 > prog = &obj->programs[l]; can`t work fine
