diff options
| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2025-09-17 09:04:03 -0700 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@kernel.org> | 2025-10-14 14:50:18 -0700 |
| commit | 164c9201e1dad8d5c0c38f583dba81e4b6da9cc7 (patch) | |
| tree | 0450426a0f0e5b73d640fe4419064db6d1507a1a /tools/objtool/elf.c | |
| parent | 2058f6d1660edc4a9bda9bee627792b352121b10 (diff) | |
objtool: Add base objtool support for livepatch modules
In preparation for klp-build, enable "classic" objtool to work on
livepatch modules:
- Avoid duplicate symbol/section warnings for prefix symbols and the
.static_call_sites and __mcount_loc sections which may have already
been extracted by klp diff.
- Add __klp_funcs to the IBT function pointer section whitelist.
- Prevent KLP symbols from getting incorrectly classified as cold
subfunctions.
Acked-by: Petr Mladek <pmladek@suse.com>
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Diffstat (limited to 'tools/objtool/elf.c')
| -rw-r--r-- | tools/objtool/elf.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index 4bb7ce994b6a..5feeefc7fc8f 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -499,7 +499,10 @@ static int elf_add_symbol(struct elf *elf, struct symbol *sym) strstarts(sym->name, "__pi___cfi_"))) sym->prefix = 1; - if (is_func_sym(sym) && strstr(sym->name, ".cold")) + if (strstarts(sym->name, ".klp.sym")) + sym->klp = 1; + + if (!sym->klp && is_func_sym(sym) && strstr(sym->name, ".cold")) sym->cold = 1; sym->pfunc = sym->cfunc = sym; |