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From:   Thomas Garnier <thgarnie@chromium.org>
To:     kernel-hardening@lists.openwall.com
Cc:     kristen@linux.intel.com, Thomas Garnier <thgarnie@google.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v7 06/12] x86: pm-trace - Adapt assembly for PIE support
Date:   Mon, 20 May 2019 16:19:31 -0700
Message-Id: <20190520231948.49693-7-thgarnie@chromium.org>
In-Reply-To: <20190520231948.49693-1-thgarnie@chromium.org>
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From: Thomas Garnier <thgarnie@google.com>

Change assembly to use the new _ASM_MOVABS macro instead of _ASM_MOV for
the assembly to be PIE compatible.

Position Independent Executable (PIE) support will allow to extend the
KASLR randomization range below 0xffffffff80000000.

Signed-off-by: Thomas Garnier <thgarnie@google.com>
---
 arch/x86/include/asm/pm-trace.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/pm-trace.h b/arch/x86/include/asm/pm-trace.h
index bfa32aa428e5..972070806ce9 100644
--- a/arch/x86/include/asm/pm-trace.h
+++ b/arch/x86/include/asm/pm-trace.h
@@ -8,7 +8,7 @@
 do {								\
 	if (pm_trace_enabled) {					\
 		const void *tracedata;				\
-		asm volatile(_ASM_MOV " $1f,%0\n"		\
+		asm volatile(_ASM_MOVABS " $1f,%0\n"		\
 			     ".section .tracedata,\"a\"\n"	\
 			     "1:\t.word %c1\n\t"		\
 			     _ASM_PTR " %c2\n"			\
-- 
2.21.0.1020.gf2820cf01a-goog