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objtool/klp: Create empty checksum sections for function-less object files

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If an object file has no functions, objtool has nothing to checksum, so
it doesn't create the .discard.sym_checksum symbol.

Then when 'objtool klp diff' reads symbol checksums, it errors out due
to the missing .discard.sym_checksum section.

Instead, just create an empty checksum section to signal to
read_sym_checksums() that the file has been processed.

Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Josh Poimboeuf 2026-03-30 21:50:46 -07:00
parent ac99992677
commit 9e4512d7de
1 changed files with 0 additions and 3 deletions
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3
tools/objtool/check.c
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@ -1044,9 +1044,6 @@ static int create_sym_checksum_section(struct objtool_file *file)
if (sym->csum.checksum)
idx++;
if (!idx)
return 0;
sec = elf_create_section_pair(file->elf, ".discard.sym_checksum", entsize,
idx, idx);
if (!sec)