linux-kernel - [tip: objtool/core] objtool/x86: Remove 0xea hack

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Message-ID: <176044247866.709179.12504013113809585079.tip-bot2@tip-bot2>
Date: Tue, 14 Oct 2025 11:47:58 -0000
From: "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Alexandre Chartre <alexandre.chartre@...cle.com>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] objtool/x86: Remove 0xea hack

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

Commit-ID:     c5df4e1ab8c00c4dc13094fa44e219bc48d910f4
Gitweb:        https://git.kernel.org/tip/c5df4e1ab8c00c4dc13094fa44e219bc48d910f4
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Wed, 24 Sep 2025 15:22:46 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 14 Oct 2025 13:43:10 +02:00

objtool/x86: Remove 0xea hack

Was properly fixed in the decoder with commit 4b626015e1bf ("x86/insn:
Stop decoding i64 instructions in x86-64 mode at opcode")

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Alexandre Chartre <alexandre.chartre@...cle.com>
---
 tools/objtool/arch/x86/decode.c |  9 ---------
 1 file changed, 9 deletions(-)

diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c
index 0ad5cc7..ce16fb2 100644
--- a/tools/objtool/arch/x86/decode.c
+++ b/tools/objtool/arch/x86/decode.c
@@ -189,15 +189,6 @@ int arch_decode_instruction(struct objtool_file *file, const struct section *sec
 	op2 = ins.opcode.bytes[1];
 	op3 = ins.opcode.bytes[2];
 
-	/*
-	 * XXX hack, decoder is buggered and thinks 0xea is 7 bytes long.
-	 */
-	if (op1 == 0xea) {
-		insn->len = 1;
-		insn->type = INSN_BUG;
-		return 0;
-	}
-
 	if (ins.rex_prefix.nbytes) {
 		rex = ins.rex_prefix.bytes[0];
 		rex_w = X86_REX_W(rex) >> 3;