linux-kernel - [tip: objtool/core] x86/asm: Fix register order

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Message-ID: <163549458269.626.2254333849360951638.tip-bot2@tip-bot2>
Date:   Fri, 29 Oct 2021 08:03:02 -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>,
        Borislav Petkov <bp@...e.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] x86/asm: Fix register order

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

Commit-ID:     a92ede2d584a2e070def59c7e47e6b6f6341c55c
Gitweb:        https://git.kernel.org/tip/a92ede2d584a2e070def59c7e47e6b6f6341c55c
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Tue, 26 Oct 2021 14:01:38 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Thu, 28 Oct 2021 23:25:26 +02:00

x86/asm: Fix register order

Ensure the register order is correct; this allows for easy translation
between register number and trampoline and vice-versa.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Borislav Petkov <bp@...e.de>
Acked-by: Josh Poimboeuf <jpoimboe@...hat.com>
Tested-by: Alexei Starovoitov <ast@...nel.org>
Link: https://lore.kernel.org/r/20211026120309.978573921@infradead.org
---
 arch/x86/include/asm/GEN-for-each-reg.h | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/GEN-for-each-reg.h b/arch/x86/include/asm/GEN-for-each-reg.h
index 1b07fb1..0794910 100644
--- a/arch/x86/include/asm/GEN-for-each-reg.h
+++ b/arch/x86/include/asm/GEN-for-each-reg.h
@@ -1,11 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * These are in machine order; things rely on that.
+ */
 #ifdef CONFIG_64BIT
 GEN(rax)
-GEN(rbx)
 GEN(rcx)
 GEN(rdx)
+GEN(rbx)
+GEN(rsp)
+GEN(rbp)
 GEN(rsi)
 GEN(rdi)
-GEN(rbp)
 GEN(r8)
 GEN(r9)
 GEN(r10)
@@ -16,10 +21,11 @@ GEN(r14)
 GEN(r15)
 #else
 GEN(eax)
-GEN(ebx)
 GEN(ecx)
 GEN(edx)
+GEN(ebx)
+GEN(esp)
+GEN(ebp)
 GEN(esi)
 GEN(edi)
-GEN(ebp)
 #endif