--- Linux 5.14.15 included a patch to fix the issue I posted about several months ago (it now sets the section type before gelf_update_rel[a]), but unfortunately 5.14 introduced a new issue [0] caused by an implicitly created empty Elf_Data. I think this would be more awkward to change in objtool, and it seems reasonable to me that elftoolchain should allow NULL d_buf if d_size is 0.
[0] https://github.com/oasislinux/oasis/blob/master/pkg/elftoolchain/patch/0005-Allow-empty-Elf_Data.patch libelf/elf_update.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libelf/elf_update.c b/libelf/elf_update.c index baf64809..4fe663d3 100644 --- a/libelf/elf_update.c +++ b/libelf/elf_update.c @@ -818,6 +818,9 @@ _libelf_write_scn(Elf *e, unsigned char *nf, struct _Elf_Extent *ex) rc = (off_t) (sh_off + d->d_off); + if (d->d_size == 0) + continue; + assert(d->d_buf != NULL); assert(d->d_version == e->e_version); assert(d->d_size % msz == 0); -- 2.32.0 _______________________________________________ Elftoolchain-developers mailing list Elftoolchain-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/elftoolchain-developers
