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bpf: Expect !info.func_info and insn_off name changes in test_btf/libbpf/bpftool

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Similar to info.jited_*, info.func_info could be 0 if
bpf_dump_raw_ok() == false.

This patch makes changes to test_btf and bpftool to expect info.func_info
could be 0.

This patch also makes the needed changes for s/insn_offset/insn_off/.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Martin KaFai Lau
2018-12-05 17:35:47 -08:00
committed by Alexei Starovoitov
parent 555249df71
commit 84ecc1f98c
4 changed files with 22 additions and 9 deletions
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12
tools/lib/bpf/btf.c
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@@ -45,7 +45,7 @@ struct btf_ext {
/* The minimum bpf_func_info checked by the loader */
struct bpf_func_info_min {
__u32 insn_offset;
__u32 insn_off;
__u32 type_id;
};
@@ -670,7 +670,7 @@ int btf_ext__reloc_init(struct btf *btf, struct btf_ext *btf_ext,
memcpy(data, sinfo->data, records_len);
/* adjust the insn_offset, the data in .BTF.ext is
/* adjust the insn_off, the data in .BTF.ext is
* the actual byte offset, and the kernel expects
* the offset in term of bpf_insn.
*
@@ -681,7 +681,7 @@ int btf_ext__reloc_init(struct btf *btf, struct btf_ext *btf_ext,
struct bpf_func_info_min *record;
record = data + i * record_size;
record->insn_offset /= sizeof(struct bpf_insn);
record->insn_off /= sizeof(struct bpf_insn);
}
*func_info = data;
@@ -722,15 +722,15 @@ int btf_ext__reloc(struct btf *btf, struct btf_ext *btf_ext,
return -ENOMEM;
memcpy(data + existing_flen, sinfo->data, records_len);
/* adjust insn_offset only, the rest data will be passed
/* adjust insn_off only, the rest data will be passed
* to the kernel.
*/
for (i = 0; i < sinfo->num_func_info; i++) {
struct bpf_func_info_min *record;
record = data + existing_flen + i * record_size;
record->insn_offset =
record->insn_offset / sizeof(struct bpf_insn) +
record->insn_off =
record->insn_off / sizeof(struct bpf_insn) +
insns_cnt;
}
*func_info = data;