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Message-Id: <84704305b08067944dc90bba3f7ac423bfe4a10d.1450442274.git.jpoimboe@redhat.com>
Date: Fri, 18 Dec 2015 06:39:32 -0600
From: Josh Poimboeuf <jpoimboe@...hat.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Cc: linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
Michal Marek <mmarek@...e.cz>,
Peter Zijlstra <peterz@...radead.org>,
Andy Lutomirski <luto@...nel.org>,
Borislav Petkov <bp@...en8.de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Andi Kleen <andi@...stfloor.org>,
Pedro Alves <palves@...hat.com>,
Namhyung Kim <namhyung@...il.com>,
Bernd Petrovitsch <bernd@...rovitsch.priv.at>,
Chris J Arges <chris.j.arges@...onical.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Jiri Slaby <jslaby@...e.cz>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH v15 18/25] x86/asm/crypto: Create stack frames in clmul_ghash_mul/update()
clmul_ghash_mul() and clmul_ghash_update() are callable non-leaf
functions which don't honor CONFIG_FRAME_POINTER, which can result in
bad stack traces.
Create stack frames for them when CONFIG_FRAME_POINTER is enabled.
Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: David S. Miller <davem@...emloft.net>
---
arch/x86/crypto/ghash-clmulni-intel_asm.S | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/crypto/ghash-clmulni-intel_asm.S b/arch/x86/crypto/ghash-clmulni-intel_asm.S
index 5d1e007..eed55c8 100644
--- a/arch/x86/crypto/ghash-clmulni-intel_asm.S
+++ b/arch/x86/crypto/ghash-clmulni-intel_asm.S
@@ -18,6 +18,7 @@
#include <linux/linkage.h>
#include <asm/inst.h>
+#include <asm/frame.h>
.data
@@ -94,6 +95,7 @@ ENDPROC(__clmul_gf128mul_ble)
/* void clmul_ghash_mul(char *dst, const u128 *shash) */
ENTRY(clmul_ghash_mul)
+ FRAME_BEGIN
movups (%rdi), DATA
movups (%rsi), SHASH
movaps .Lbswap_mask, BSWAP
@@ -101,6 +103,7 @@ ENTRY(clmul_ghash_mul)
call __clmul_gf128mul_ble
PSHUFB_XMM BSWAP DATA
movups DATA, (%rdi)
+ FRAME_END
ret
ENDPROC(clmul_ghash_mul)
@@ -109,6 +112,7 @@ ENDPROC(clmul_ghash_mul)
* const u128 *shash);
*/
ENTRY(clmul_ghash_update)
+ FRAME_BEGIN
cmp $16, %rdx
jb .Lupdate_just_ret # check length
movaps .Lbswap_mask, BSWAP
@@ -128,5 +132,6 @@ ENTRY(clmul_ghash_update)
PSHUFB_XMM BSWAP DATA
movups DATA, (%rdi)
.Lupdate_just_ret:
+ FRAME_END
ret
ENDPROC(clmul_ghash_update)
--
2.4.3
--
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