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| author |   Andrii Nakryiko <andriin@fb.com> | 2019-10-15 11:28:47 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-10-15 16:06:05 -0700 |
| commit | 62561eb442bd095f06534ce637b116b278e5e912 (patch) | |
| tree | 02791f42e5e643fafd896b0d1492f581835b28cb /tools/lib/bpf/libbpf.h | |
| parent | libbpf: Refactor bpf_object__open APIs to use common opts (diff) | |
| download | linux-dev-62561eb442bd095f06534ce637b116b278e5e912.tar.xz linux-dev-62561eb442bd095f06534ce637b116b278e5e912.zip | |
libbpf: Add support for field existance CO-RE relocation
Add support for BPF_FRK_EXISTS relocation kind to detect existence of
captured field in a destination BTF, allowing conditional logic to
handle incompatible differences between kernels.
Also introduce opt-in relaxed CO-RE relocation handling option, which
makes libbpf emit warning for failed relocations, but proceed with other
relocations. Instruction, for which relocation failed, is patched with
(u32)-1 value.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191015182849.3922287-4-andriin@fb.com
Diffstat (limited to '')
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 667e6853e51f..53ce212764e0 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -96,8 +96,10 @@ struct bpf_object_open_opts { const char *object_name; /* parse map definitions non-strictly, allowing extra attributes/data */ bool relaxed_maps; + /* process CO-RE relocations non-strictly, allowing them to fail */ + bool relaxed_core_relocs; }; -#define bpf_object_open_opts__last_field relaxed_maps +#define bpf_object_open_opts__last_field relaxed_core_relocs LIBBPF_API struct bpf_object *bpf_object__open(const char *path); LIBBPF_API struct bpf_object * |