From d911cd944dbf3f682efdee7837aec2027c63f612 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Mon, 13 Nov 2017 20:22:24 +0100 Subject: curve25519-neon: compile in thumb mode In thumb mode, it's not possible to use sp as an operand of and, so we have to muck around with r3 as a scratch register. --- src/crypto/curve25519-neon-arm.S | 6 +++--- src/crypto/curve25519.c | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) (limited to 'src/crypto') diff --git a/src/crypto/curve25519-neon-arm.S b/src/crypto/curve25519-neon-arm.S index 1a921e2..b54211a 100644 --- a/src/crypto/curve25519-neon-arm.S +++ b/src/crypto/curve25519-neon-arm.S @@ -6,15 +6,15 @@ #include .text - .arm .fpu neon .align 4 ENTRY(curve25519_asm_neon) vpush {q4,q5,q6,q7} mov r12,sp - sub sp,sp,#736 - and sp,sp,#0xffffffe0 + sub r3,sp,#736 + and r3,r3,#0xffffffe0 + mov sp,r3 strd r4,[sp,#0] strd r6,[sp,#8] strd r8,[sp,#16] diff --git a/src/crypto/curve25519.c b/src/crypto/curve25519.c index 232c6d4..ddabfdf 100644 --- a/src/crypto/curve25519.c +++ b/src/crypto/curve25519.c @@ -192,7 +192,7 @@ static void curve25519_sandy2x_base(u8 pub[CURVE25519_POINT_SIZE], const u8 secr memzero_explicit(x_51, sizeof(x_51)); memzero_explicit(z_51, sizeof(z_51)); } -#elif IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && defined(CONFIG_ARM) && !defined(CONFIG_CPU_THUMBONLY) +#elif IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && defined(CONFIG_ARM) #include #include #include @@ -1470,7 +1470,7 @@ static void cmult(limb *resultx, limb *resultz, const u8 *n, const limb *q) bool curve25519(u8 mypublic[CURVE25519_POINT_SIZE], const u8 secret[CURVE25519_POINT_SIZE], const u8 basepoint[CURVE25519_POINT_SIZE]) { -#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && defined(CONFIG_ARM) && !defined(CONFIG_CPU_THUMBONLY) +#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && defined(CONFIG_ARM) if (curve25519_use_neon && may_use_simd()) { kernel_neon_begin(); curve25519_asm_neon(mypublic, secret, basepoint); @@ -1649,7 +1649,7 @@ static void cmult(struct other_stack *s, limb *resultx, limb *resultz, const u8 bool curve25519(u8 mypublic[CURVE25519_POINT_SIZE], const u8 secret[CURVE25519_POINT_SIZE], const u8 basepoint[CURVE25519_POINT_SIZE]) { -#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && defined(CONFIG_ARM) && !defined(CONFIG_CPU_THUMBONLY) +#if IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && defined(CONFIG_ARM) if (curve25519_use_neon && may_use_simd()) { kernel_neon_begin(); curve25519_asm_neon(mypublic, secret, basepoint); -- cgit v1.2.3-59-g8ed1b