Commit cb097be7 authored Feb 25, 2018 by Kees Cook Committed by Thomas Gleixner Feb 28, 2018

x86/refcounts: Switch to UD2 for exceptions



As done in commit 3b3a371c ("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

parent f3afe530

arch/x86/include/asm/refcount.h

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -17,7 +17,7 @@
	#define _REFCOUNT_EXCEPTION \		#define _REFCOUNT_EXCEPTION \
	".pushsection .text..refcount\n" \		".pushsection .text..refcount\n" \
	"111:\tlea %[counter], %%" _ASM_CX "\n" \		"111:\tlea %[counter], %%" _ASM_CX "\n" \
	"112:\t" ASM_UD0 "\n" \		"112:\t" ASM_UD2 "\n" \
	ASM_UNREACHABLE \		ASM_UNREACHABLE \
	".popsection\n" \		".popsection\n" \
	"113:\n" \		"113:\n" \