diff options
| author | Alexei Starovoitov <ast@kernel.org> | 2021-12-01 10:10:32 -0800 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-12-02 11:18:35 -0800 |
| commit | d0e928876e30b18411b80fd2445424bc00e95745 (patch) | |
| tree | 6043d1a9b495963a519b16e1364f6936a65ffa60 /tools/lib/bpf/bpf_gen_internal.h | |
| parent | 1e89106da25390826608ad6ac0edfb7c9952eff3 (diff) | |
libbpf: Use CO-RE in the kernel in light skeleton.
Without lskel the CO-RE relocations are processed by libbpf before any other
work is done. Instead, when lskel is needed, remember relocation as RELO_CORE
kind. Then when loader prog is generated for a given bpf program pass CO-RE
relos of that program to gen loader via bpf_gen__record_relo_core(). The gen
loader will remember them as-is and pass it later as-is into the kernel.
The normal libbpf flow is to process CO-RE early before call relos happen. In
case of gen_loader the core relos have to be added to other relos to be copied
together when bpf static function is appended in different places to other main
bpf progs. During the copy the append_subprog_relos() will adjust insn_idx for
normal relos and for RELO_CORE kind too. When that is done each struct
reloc_desc has good relos for specific main prog.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211201181040.23337-10-alexei.starovoitov@gmail.com
Diffstat (limited to 'tools/lib/bpf/bpf_gen_internal.h')
| -rw-r--r-- | tools/lib/bpf/bpf_gen_internal.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/lib/bpf/bpf_gen_internal.h b/tools/lib/bpf/bpf_gen_internal.h index ae7704deba30..9d57fa84664b 100644 --- a/tools/lib/bpf/bpf_gen_internal.h +++ b/tools/lib/bpf/bpf_gen_internal.h @@ -39,6 +39,8 @@ struct bpf_gen { int error; struct ksym_relo_desc *relos; int relo_cnt; + struct bpf_core_relo *core_relos; + int core_relo_cnt; char attach_target[128]; int attach_kind; struct ksym_desc *ksyms; @@ -64,5 +66,6 @@ void bpf_gen__map_freeze(struct bpf_gen *gen, int map_idx); void bpf_gen__record_attach_target(struct bpf_gen *gen, const char *name, enum bpf_attach_type type); void bpf_gen__record_extern(struct bpf_gen *gen, const char *name, bool is_weak, bool is_typeless, int kind, int insn_idx); +void bpf_gen__record_relo_core(struct bpf_gen *gen, const struct bpf_core_relo *core_relo); #endif |