linux-kernel - [RFC PATCH v3 11/22] objtool: arm64: Invoke the decoder

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Date:   Thu,  2 Feb 2023 01:40:25 -0600
From:   madvenka@...ux.microsoft.com
To:     jpoimboe@...hat.com, peterz@...radead.org, chenzhongjin@...wei.com,
        mark.rutland@....com, broonie@...nel.org, nobuta.keiya@...itsu.com,
        sjitindarsingh@...il.com, catalin.marinas@....com, will@...nel.org,
        jamorris@...ux.microsoft.com, linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
        madvenka@...ux.microsoft.com
Subject: [RFC PATCH v3 11/22] objtool: arm64: Invoke the decoder

From: "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>

Invoke decode_instructions() from check(). For Dynamic Validation of
the frame pointer, we only need the "-s" option for objtool.

Signed-off-by: Madhavan T. Venkataraman <madvenka@...ux.microsoft.com>
---
 tools/objtool/dcheck.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/objtool/dcheck.c b/tools/objtool/dcheck.c
index e2098c9ad282..cd2700153408 100644
--- a/tools/objtool/dcheck.c
+++ b/tools/objtool/dcheck.c
@@ -9,8 +9,13 @@
 #include <sys/mman.h>
 
 #include <objtool/objtool.h>
+#include <objtool/builtin.h>
+#include <objtool/insn.h>
 
 int check(struct objtool_file *file)
 {
-	return 0;
+	if (!opts.stackval)
+		return 1;
+
+	return decode_instructions(file);
 }
-- 
2.25.1