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Message-Id: <20240228024535.79980-2-qirui.001@bytedance.com>
Date: Wed, 28 Feb 2024 10:45:33 +0800
From: Rui Qi <qirui.001@...edance.com>
To: bp@...en8.de,
mingo@...hat.com,
tglx@...utronix.de,
hpa@...or.com,
jpoimboe@...hat.com,
peterz@...radead.org,
mbenes@...e.cz,
gregkh@...uxfoundation.org,
stable@...r.kernel.org,
alexandre.chartre@...cle.com
Cc: x86@...nel.org,
linux-kernel@...r.kernel.org,
yuanzhu@...edance.com,
Rui Qi <qirui.001@...edance.com>
Subject: [PATCH v2 1/3] objtool: is_fentry_call() crashes if call has no destination
From: Alexandre Chartre <alexandre.chartre@...cle.com>
commit 87cf61fe848ca8ddf091548671e168f52e8a718e upstream.
Fix is_fentry_call() so that it works if a call has no destination
set (call_dest). This needs to be done in order to support intra-
function calls.
Signed-off-by: Alexandre Chartre <alexandre.chartre@...cle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Miroslav Benes <mbenes@...e.cz>
Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>
Link: https://lkml.kernel.org/r/20200414103618.12657-2-alexandre.chartre@oracle.com
Signed-off-by: Rui Qi <qirui.001@...edance.com>
---
tools/objtool/check.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index dfd67243faac..71a24fd46dbd 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1367,7 +1367,7 @@ static int decode_sections(struct objtool_file *file)
static bool is_fentry_call(struct instruction *insn)
{
- if (insn->type == INSN_CALL &&
+ if (insn->type == INSN_CALL && insn->call_dest &&
insn->call_dest->type == STT_NOTYPE &&
!strcmp(insn->call_dest->name, "__fentry__"))
return true;
--
2.39.2 (Apple Git-143)
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