Running objtool klp-diff on a changed function which uses WARN() can
fail with:
vmlinux.o: error: objtool: md_run+0x866: failed to convert reloc sym '__bug_table' to its proper format
The problem is that since commit 5b472b6e5b ("x86_64/bug: Implement
__WARN_printf()"), each __WARN_printf() call site now directly
references its bug table entry. klp-diff errors out when it can't
convert such section-based references to object symbols (because bug
table entries don't have symbols).
Luckily, klp-diff already has code to create symbols for bug table
entries. Move that code earlier, before function diffing.
Fixes: dd590d4d57 ("objtool/klp: Introduce klp diff subcommand for diffing object files")
Fixes: 5b472b6e5b ("x86_64/bug: Implement __WARN_printf()")
Reported-by: Song Liu <song@kernel.org>
Tested-by: Song Liu <song@kernel.org>
Link: https://patch.msgid.link/a8e0a714b9da962858842b9aecd63b4900927c88.1769406850.git.jpoimboe@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
f2dba60339