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charset="utf-8" For BPF_PROG_TYPE_STRUCT_OPS programs in light skeletons, load_attr's expected_attach_type and attach_btf_id hold data blob offsets populated at runtime by bpf_gen__init_kern_struct_ops(). Emit instructions in bpf_gen__prog_load() to copy the resolved member index into prog_load_attr.expected_attach_type and unpack the 64-bit (btf_obj_fd << 32) | kern_type_id value from load_attr->attach_btf_id into prog_load_attr.attach_btf_id and prog_load_attr.attach_btf_obj_fd. Signed-off-by: Siddharth Nayyar --- tools/lib/bpf/gen_loader.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/tools/lib/bpf/gen_loader.c b/tools/lib/bpf/gen_loader.c index 6027a2762c35..aaa491463521 100644 --- a/tools/lib/bpf/gen_loader.c +++ b/tools/lib/bpf/gen_loader.c @@ -1151,6 +1151,20 @@ void bpf_gen__prog_load(struct bpf_gen *gen, emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, offsetof(union bpf_attr, attach_btf_obj_fd))); } + if (prog_type == BPF_PROG_TYPE_STRUCT_OPS) { + move_blob2blob(gen, attr_field(prog_load_attr, expected_attach_type), 4, + load_attr->expected_attach_type); + emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_1, BPF_PSEUDO_MAP_IDX_VALUE, + 0, 0, 0, load_attr->attach_btf_id)); + emit(gen, BPF_LDX_MEM(BPF_DW, BPF_REG_7, BPF_REG_1, 0)); + emit2(gen, BPF_LD_IMM64_RAW_FULL(BPF_REG_0, BPF_PSEUDO_MAP_IDX_VALUE, + 0, 0, 0, prog_load_attr)); + emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, + offsetof(union bpf_attr, attach_btf_id))); + emit(gen, BPF_ALU64_IMM(BPF_RSH, BPF_REG_7, 32)); + emit(gen, BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, + offsetof(union bpf_attr, attach_btf_obj_fd))); + } emit_relos(gen, insns_off); /* emit PROG_LOAD command */ emit_sys_bpf(gen, BPF_PROG_LOAD, prog_load_attr, attr_size); -- 2.56.0.455.g6c5a503b38-goog