[git] GCRYPT - branch, master, updated. libgcrypt-1.6.0-73-gc20daee

[by Jussi Kivilinna]

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- Log -----------------------------------------------------------------
commit c20daeeb05329bfc6cc2c562cbd4b965291fe0e1
Author: Jussi Kivilinna <jussi.kivilinna at iki.fi>
Date:   Mon May 12 20:14:32 2014 +0300

    chacha20/AVX2: clear upper-halfs of YMM registers on entry
    
    * cipher/chacha20-avx2-amd64.S (_gcry_chacha20_amd64_avx2_blocks): Add
    'vzeroupper' at beginning.
    --
    
    Signed-off-by: Jussi Kivilinna <jussi.kivilinna at iki.fi>

diff --git a/cipher/chacha20-avx2-amd64.S b/cipher/chacha20-avx2-amd64.S
index 0c5f3f9..1f33de8 100644
--- a/cipher/chacha20-avx2-amd64.S
+++ b/cipher/chacha20-avx2-amd64.S
@@ -42,6 +42,7 @@
 .type  _gcry_chacha20_amd64_avx2_blocks, at function;
 _gcry_chacha20_amd64_avx2_blocks:
 .Lchacha_blocks_avx2_local:
+	vzeroupper
 	pushq %rbx
 	pushq %rbp
 	pushq %r12

commit a3062db748f272e0f7346e1ed9e0bf7ed61a4eae
Author: Jussi Kivilinna <jussi.kivilinna at iki.fi>
Date:   Mon May 12 20:11:33 2014 +0300

    chacha20/AVX2: check for ENABLE_AVX2_SUPPORT instead of HAVE_GCC_INLINE_ASM_AVX2
    
    * cipher/chacha20.c (USE_AVX2): Enable depending on
    ENABLE_AVX2_SUPPORT, not HAVE_GCC_INLINE_ASM_AVX2.
    * cipher/chacha20-avx2-amd64.S: Ditto.
    --
    
    Signed-off-by: Jussi Kivilinna <jussi.kivilinna at iki.fi>

diff --git a/cipher/chacha20-avx2-amd64.S b/cipher/chacha20-avx2-amd64.S
index c50a0c0..0c5f3f9 100644
--- a/cipher/chacha20-avx2-amd64.S
+++ b/cipher/chacha20-avx2-amd64.S
@@ -27,7 +27,7 @@
 #include <config.h>
 
 #if defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS) && \
-    defined(HAVE_GCC_INLINE_ASM_AVX2) && USE_CHACHA20
+    defined(ENABLE_AVX2_SUPPORT) && USE_CHACHA20
 
 #ifdef __PIC__
 #  define RIP (%rip)
diff --git a/cipher/chacha20.c b/cipher/chacha20.c
index 2ac5a32..e2cf442 100644
--- a/cipher/chacha20.c
+++ b/cipher/chacha20.c
@@ -57,7 +57,7 @@
 /* USE_AVX2 indicates whether to compile with Intel AVX2 code. */
 #undef USE_AVX2
 #if defined(__x86_64__) && defined(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS) && \
-    defined(HAVE_GCC_INLINE_ASM_AVX2)
+    defined(ENABLE_AVX2_SUPPORT)
 # define USE_AVX2 1
 #endif
 

commit a7d9eeeba632b7eb4a5b15ff17f6565181642f3c
Author: Jussi Kivilinna <jussi.kivilinna at iki.fi>
Date:   Mon May 12 19:55:35 2014 +0300

    chacha20/SSSE3: clear XMM registers after use
    
    * cipher/chacha20-ssse3-amd64.S (_gcry_chacha20_amd64_ssse3_blocks): On
    return, clear XMM registers.
    --
    
    Signed-off-by: Jussi Kivilinna <jussi.kivilinna at iki.fi>

diff --git a/cipher/chacha20-ssse3-amd64.S b/cipher/chacha20-ssse3-amd64.S
index aaa7e5b..50c2ff8 100644
--- a/cipher/chacha20-ssse3-amd64.S
+++ b/cipher/chacha20-ssse3-amd64.S
@@ -594,9 +594,25 @@ _gcry_chacha20_amd64_ssse3_blocks:
 .Lchacha_blocks_ssse3_done:
 	movdqu %xmm11, 48(%rdi)
 	movq %rbp, %rsp
+	pxor %xmm15, %xmm15
+	pxor %xmm7, %xmm7
+	pxor %xmm14, %xmm14
+	pxor %xmm6, %xmm6
+	pxor %xmm13, %xmm13
+	pxor %xmm5, %xmm5
+	pxor %xmm12, %xmm12
+	pxor %xmm4, %xmm4
 	popq %rbp
 	popq %rbx
 	movl $(63 + 512 + 16), %eax
+	pxor %xmm11, %xmm11
+	pxor %xmm3, %xmm3
+	pxor %xmm10, %xmm10
+	pxor %xmm2, %xmm2
+	pxor %xmm9, %xmm9
+	pxor %xmm1, %xmm1
+	pxor %xmm8, %xmm8
+	pxor %xmm0, %xmm0
 	ret
 .size _gcry_chacha20_amd64_ssse3_blocks,.-_gcry_chacha20_amd64_ssse3_blocks;
 

-----------------------------------------------------------------------

Summary of changes:
 cipher/chacha20-avx2-amd64.S  |    3 ++-
 cipher/chacha20-ssse3-amd64.S |   16 ++++++++++++++++
 cipher/chacha20.c             |    2 +-
 3 files changed, 19 insertions(+), 2 deletions(-)


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