objtool: Treat .text.__x86.* as noinstr

Needed because zen_untrain_ret() will be called from noinstr code.

Also makes sense since the thunks MUST NOT contain instrumentation nor
be poked with dynamic instrumentation.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index f6d4ffa..b98fd68 100644 (file)
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -376,7 +376,8 @@ static int decode_instructions(struct objtool_file *file)
                        sec->text = true;
 
                if (!strcmp(sec->name, ".noinstr.text") ||
-                   !strcmp(sec->name, ".entry.text"))
+                   !strcmp(sec->name, ".entry.text") ||
+                   !strncmp(sec->name, ".text.__x86.", 12))
                        sec->noinstr = true;
 
                for (offset = 0; offset < sec->sh.sh_size; offset += insn->len) {