Eric Lee / smarc-fsl-linux-kernel

06 Dec, 2014

1 commit

  • 249b812d8   samples: bpf: elf_bpf file loader ... Browse Code ยป

    simple .o parser and loader using BPF syscall.
    .o is a standard ELF generated by LLVM backend

    It parses elf file compiled by llvm .c->.o
    - parses 'maps' section and creates maps via BPF syscall
    - parses 'license' section and passes it to syscall
    - parses elf relocations for BPF maps and adjusts BPF_LD_IMM64 insns
    by storing map_fd into insn->imm and marking such insns as BPF_PSEUDO_MAP_FD
    - loads eBPF programs via BPF syscall

    One ELF file can contain multiple BPF programs.

    int load_bpf_file(char *path);
    populates prog_fd[] and map_fd[] with FDs received from bpf syscall

    bpf_helpers.h - helper functions available to eBPF programs written in C

    Signed-off-by: Alexei Starovoitov
    Signed-off-by: David S. Miller

    Alexei Starovoitov