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From: Alexandre Chartre <alexandre.chartre@oracle.com>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, jpoimboe@redhat.com,
	peterz@infradead.org, jthierry@redhat.com, tglx@linutronix.de,
	alexandre.chartre@oracle.com
Subject: [PATCH V3 1/9] objtool: is_fentry_call() crashes if call has no destination
Date: Tue, 14 Apr 2020 12:36:10 +0200	[thread overview]
Message-ID: <20200414103618.12657-2-alexandre.chartre@oracle.com> (raw)
In-Reply-To: <20200414103618.12657-1-alexandre.chartre@oracle.com>

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@oracle.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 8dd01f986fbb..bd25c3ad651a 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1409,7 +1409,7 @@ 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;
-- 
2.18.2


  reply	other threads:[~2020-04-14 10:57 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-14 10:36 [PATCH V3 0/9] objtool changes to check retpoline code Alexandre Chartre
2020-04-14 10:36 ` Alexandre Chartre [this message]
2020-05-01 18:22   ` [tip: objtool/core] objtool: is_fentry_call() crashes if call has no destination tip-bot2 for Alexandre Chartre
2020-04-14 10:36 ` [PATCH V3 2/9] objtool: Allow branches within the same alternative Alexandre Chartre
2020-04-14 10:36 ` [PATCH V3 3/9] objtool: Add support for intra-function calls Alexandre Chartre
2020-04-14 12:07   ` Julien Thierry
2020-04-16 12:12   ` Miroslav Benes
2020-05-01 18:22   ` [tip: objtool/core] " tip-bot2 for Alexandre Chartre
2020-04-14 10:36 ` [PATCH V3 4/9] objtool: Handle return instruction with intra-function call Alexandre Chartre
2020-04-14 13:44   ` Julien Thierry
2020-04-14 10:36 ` [PATCH V3 5/9] objtool: Add return address unwind hints Alexandre Chartre
2020-04-14 16:16   ` Peter Zijlstra
2020-04-14 16:40     ` Alexandre Chartre
2020-04-14 17:56       ` Peter Zijlstra
2020-04-14 18:31         ` Alexandre Chartre
2020-04-14 18:42           ` Peter Zijlstra
2020-04-14 19:27             ` Alexandre Chartre
2020-04-14 19:48               ` Peter Zijlstra
2020-04-14 10:36 ` [PATCH V3 6/9] objtool: Report inconsistent stack changes in alternative Alexandre Chartre
2020-04-14 15:35   ` Julien Thierry
2020-04-14 22:41   ` kbuild test robot
2020-04-14 22:41     ` kbuild test robot
2020-04-14 23:09   ` kbuild test robot
2020-04-14 23:09     ` kbuild test robot
2020-04-16 14:18   ` Peter Zijlstra
2020-04-16 14:43     ` Alexandre Chartre
2020-04-14 10:36 ` [PATCH V3 7/9] x86/speculation: Change __FILL_RETURN_BUFFER to work with objtool Alexandre Chartre
2020-04-14 10:36 ` [PATCH V3 8/9] x86/speculation: Add return address unwind hints to retpoline and RSB stuffing Alexandre Chartre
2020-04-14 10:36 ` [PATCH V3 9/9] x86/speculation: Annotate intra-function calls Alexandre Chartre

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