[v6] objtool: Function validation tracing

[PATCH v6 16/30] objtool: Do not validate IBT for .return_sites and .call_sites

Posted by Alexandre Chartre 1 week, 3 days ago

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@oracle.com>
---
 tools/objtool/check.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index fb000923718dc..0da86834ab2ab 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4805,6 +4805,8 @@ 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")			||
 		    !strcmp(sec->name, "__patchable_function_entries"))
 			continue;
 
-- 
2.43.5

[tip: objtool/core] objtool: Do not validate IBT for .return_sites and .call_sites

Posted by tip-bot2 for Alexandre Chartre 1 week ago

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     c3b7d044fc5ac99a31ce9420431b90e21ed55503
Gitweb:        https://git.kernel.org/tip/c3b7d044fc5ac99a31ce9420431b90e21ed55503
Author:        Alexandre Chartre <alexandre.chartre@oracle.com>
AuthorDate:    Fri, 21 Nov 2025 10:53:26 +01:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Fri, 21 Nov 2025 15:30:12 +01:00

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@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://patch.msgid.link/20251121095340.464045-17-alexandre.chartre@oracle.com
---
 tools/objtool/check.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 442b655..4ebadf9 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4753,6 +4753,8 @@ 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")			||
 		    !strcmp(sec->name, "__patchable_function_entries"))
 			continue;