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authorAlexei Starovoitov <ast@plumgrid.com>2014-12-01 15:06:37 -0800
committerDavid S. Miller <davem@davemloft.net>2014-12-05 21:47:33 -0800
commit249b812d8005ec38e351ee763ceb85d56b155064 (patch)
treeb81980d495f62e9a167ab75e132da0d387713179 /samples/bpf/libbpf.h
parent03f4723ed7a52bd31da26eefe2cdde563ea0f468 (diff)
downloadlinux-249b812d8005ec38e351ee763ceb85d56b155064.tar.gz
samples: bpf: elf_bpf file loader
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 <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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