[PATCH 09/11] salsa20-amd64: clear vectors registers
Jussi Kivilinna <[email protected]>
| Newsgroups | gmane.comp.encryption.gpg.libgcrypt.devel |
|---|---|
| Message-ID | <[email protected]> |
* cipher/salsa20-amd64.S (CLEAR_REG): New. (_gcry_salsa20_amd64_encrypt_blocks): Clear vectors registers at exit. -- Signed-off-by: Jussi Kivilinna <[email protected]> --- cipher/salsa20-amd64.S | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/cipher/salsa20-amd64.S b/cipher/salsa20-amd64.S index 6efb75e0..ce1495c4 100644 --- a/cipher/salsa20-amd64.S +++ b/cipher/salsa20-amd64.S @@ -30,6 +30,8 @@ #include "asm-common-amd64.h" +#define CLEAR_REG(v) pxor v, v + .text .align 16 @@ -926,6 +928,22 @@ _gcry_salsa20_amd64_encrypt_blocks: CFI_DEF_CFA_REGISTER(%rsp) pop %rbx CFI_POP(%rbx) + 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); ret_spec_stop CFI_RESTORE_STATE(); .L_bytes_are_128_or_192: -- 2.45.2