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From: Jiri Slaby <jslaby@suse.cz>
To: mingo@kernel.org
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
	Jiri Slaby <jslaby@suse.cz>, Josh Poimboeuf <jpoimboe@redhat.com>
Subject: [PATCH] objtool: fix iret's opcode
Date: Wed, 18 Jan 2017 14:29:21 +0100
Message-ID: <20170118132921.19319-1-jslaby@suse.cz> (raw)

iret is 0xcf according to the Intel manual and also to objdump of my
vmlinux:
    1ea8:       48 cf                   iretq

Fix the opcode in arch_decode_instruction.

The previous value (0xc5) seems to correspond to lds.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
---
 tools/objtool/arch/x86/decode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c
index 5e0dea2cdc01..039636ffb6c8 100644
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -150,9 +150,9 @@ int arch_decode_instruction(struct elf *elf, struct section *sec,
 		*type = INSN_RETURN;
 		break;
 
-	case 0xc5: /* iret */
 	case 0xca: /* retf */
 	case 0xcb: /* retf */
+	case 0xcf: /* iret */
 		*type = INSN_CONTEXT_SWITCH;
 		break;
 
-- 
2.11.0

             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-18 13:29 Jiri Slaby [this message]
2017-01-18 16:17 ` Josh Poimboeuf
2017-01-19  9:10 ` [tip:core/urgent] objtool: Fix IRET's opcode tip-bot for Jiri Slaby

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