linux-kernel - [RFC PATCH v2 15/17] objtool: Do not validate IBT for .return_sites and .call

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Message-ID: <20250619145659.1377970-16-alexandre.chartre@oracle.com>
Date: Thu, 19 Jun 2025 16:56:57 +0200
From: Alexandre Chartre <alexandre.chartre@...cle.com>
To: linux-kernel@...r.kernel.org, mingo@...nel.org, jpoimboe@...nel.org,
        peterz@...radead.org
Cc: alexandre.chartre@...cle.com
Subject: [RFC PATCH v2 15/17] objtool: Do not validate IBT for .return_sites and .call_sites

The .return_sites and .call_sites sections reference text addresses,
but not with the intent to indirect branch to them, so they don't
need to be validated for IBT.

This is useful when running objtool on object files which already
have .return_sites or .call_sites sections, for example to re-run
objtool after it has reported an error or a warning.

Signed-off-by: Alexandre Chartre <alexandre.chartre@...cle.com>
---
 tools/objtool/check.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 43c88a5fd58a..fecdf6f42358 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4645,6 +4645,8 @@ static int validate_ibt(struct objtool_file *file)
 		    !strcmp(sec->name, ".llvm.call-graph-profile")	||
 		    !strcmp(sec->name, ".llvm_bb_addr_map")		||
 		    !strcmp(sec->name, "__tracepoints")			||
+		    !strcmp(sec->name, ".return_sites")			||
+		    !strcmp(sec->name, ".call_sites")			||
 		    strstr(sec->name, "__patchable_function_entries"))
 			continue;
 
-- 
2.43.5