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| author | Alan Maguire <alan.maguire@oracle.com> | 2026-10-09 12:23:21 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-10-11 14:18:06 +0000 |
| commit | 5876080366ae3967a3aad5e193ea0e7704fa022d (patch) | |
| tree | fada205332a7196e97c5fdf57453fd30fc004150 /include | |
| parent | 672981f4aec1d0131761aec60298312464bd7a50 (diff) | |
| download | linux-next-5876080366ae3967a3aad5e193ea0e7704fa022d.tar.gz linux-next-5876080366ae3967a3aad5e193ea0e7704fa022d.zip | |
btf: Preserve string relocation maps for split BTF
Make btf_relocate() optionally return the string-offset map it builds
while relocating a BTF relative to a distilled base. A subsequent split
BTF object can use that map to rebase references to base strings.
Also account for the accumulated base string offset when assigning a
new BTF base. This is required when the base is itself split.
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://patch.msgid.link/20261009112324.1442319-5-alan.maguire@oracle.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/btf.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/btf.h b/include/linux/btf.h index f731c7a5f14c..b66e20a18c54 100644 --- a/include/linux/btf.h +++ b/include/linux/btf.h @@ -608,7 +608,8 @@ struct btf_field_iter { #ifdef CONFIG_BPF_SYSCALL const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id); void btf_set_base_btf(struct btf *btf, const struct btf *base_btf); -int btf_relocate(struct btf *btf, const struct btf *base_btf, __u32 **map_ids); +int btf_relocate(struct btf *btf, const struct btf *base_btf, __u32 **map_ids, + __u32 **map_strs); int btf_field_iter_init(struct btf_field_iter *it, struct btf_type *t, enum btf_field_iter_kind iter_kind); __u32 *btf_field_iter_next(struct btf_field_iter *it); @@ -682,7 +683,7 @@ static inline void btf_set_base_btf(struct btf *btf, const struct btf *base_btf) } static inline int btf_relocate(void *log, struct btf *btf, const struct btf *base_btf, - __u32 **map_ids) + __u32 **map_ids, __u32 **map_strs) { return -EOPNOTSUPP; } |