[PATCH 08/11] whirlpool-sse2-amd64: clear vectors registers

[Jussi Kivilinna]

* cipher/whirlpool-sse2-amd64.S (CLEAR_REG): New.
(_gcry_whirlpool_transform_amd64): Clear vectors registers
at exit.
--

Signed-off-by: Jussi Kivilinna <jussi.kivili...@iki.fi>
---
 cipher/whirlpool-sse2-amd64.S | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/cipher/whirlpool-sse2-amd64.S b/cipher/whirlpool-sse2-amd64.S
index 37648faa..39959a45 100644
--- a/cipher/whirlpool-sse2-amd64.S
+++ b/cipher/whirlpool-sse2-amd64.S
@@ -27,6 +27,8 @@
 
 .text
 
+#define CLEAR_REG(v) pxor v, v
+
 /* look-up table offsets on RTAB */
 #define RC (0)
 #define C0 (RC + (8 * 10))
@@ -338,6 +340,24 @@ _gcry_whirlpool_transform_amd64:
        CFI_RESTORE(%r15);
        addq $STACK_MAX, %rsp;
        CFI_ADJUST_CFA_OFFSET(-STACK_MAX);
+
+       CLEAR_REG(%xmm0);
+       CLEAR_REG(%xmm1);
+       CLEAR_REG(%xmm2);
+       CLEAR_REG(%xmm3);
+       CLEAR_REG(%xmm4);
+       CLEAR_REG(%xmm5);
+       CLEAR_REG(%xmm6);
+       CLEAR_REG(%xmm7);
+       CLEAR_REG(%xmm8);
+       CLEAR_REG(%xmm9);
+       CLEAR_REG(%xmm10);
+       CLEAR_REG(%xmm11);
+       CLEAR_REG(%xmm12);
+       CLEAR_REG(%xmm13);
+       CLEAR_REG(%xmm14);
+       CLEAR_REG(%xmm15);
+
 .Lskip:
        movl $(STACK_MAX + 8), %eax;
        ret_spec_stop;
-- 
2.45.2


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