lkml.org 
[lkml]   [2018]   [Feb]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:x86/urgent] x86/refcounts: Switch to UD2 for exceptions
Commit-ID:  cb097be7036aa325adba33d8c41fe77b980b0e77
Gitweb: https://git.kernel.org/tip/cb097be7036aa325adba33d8c41fe77b980b0e77
Author: Kees Cook <keescook@chromium.org>
AuthorDate: Sun, 25 Feb 2018 08:50:56 -0800
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 28 Feb 2018 15:18:40 +0100

x86/refcounts: Switch to UD2 for exceptions

As done in commit 3b3a371cc9bc ("x86/debug: Use UD2 for WARN()"), this
switches to UD2 from UD0 to keep disassembly readable.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20180225165056.GA11719@beast

---
arch/x86/include/asm/refcount.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/refcount.h b/arch/x86/include/asm/refcount.h
index d65171120e90..4cf11d88d3b3 100644
--- a/arch/x86/include/asm/refcount.h
+++ b/arch/x86/include/asm/refcount.h
@@ -17,7 +17,7 @@
#define _REFCOUNT_EXCEPTION \
".pushsection .text..refcount\n" \
"111:\tlea %[counter], %%" _ASM_CX "\n" \
- "112:\t" ASM_UD0 "\n" \
+ "112:\t" ASM_UD2 "\n" \
ASM_UNREACHABLE \
".popsection\n" \
"113:\n" \
\
 
 \ /
  Last update: 2018-02-28 15:22    [W:0.047 / U:0.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site