Adapt AES-NI code to "old" binutil versions
This commit is contained in:
Manuel Pégourié-Gonnard
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c73079a78c
commit
b1fd397be6
1 changed files with 64 additions and 38 deletions
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@ -58,6 +58,32 @@ int aesni_supports( unsigned int what )
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return( ( c & what ) != 0 );
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}
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/*
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* Binutils needs to be at least 2.19 to support AES-NI instructions.
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* Unfortunately, a lot of users have a lower version now (2014-04).
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* Emit bytecode directly in order to support "old" version of gas.
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*
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* Opcodes from the Intel architecture reference manual, vol. 3.
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* We always use registers, so we don't need prefixes for memory operands.
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* Operand macros are in gas order (src, dst) as opposed to Intel order
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* (dst, src) in order to blend better into the surrounding assembly code.
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*/
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#define AESDEC ".byte 0x66,0x0F,0x38,0xDE,"
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#define AESDECLAST ".byte 0x66,0x0F,0x38,0xDF,"
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#define AESENC ".byte 0x66,0x0F,0x38,0xDC,"
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#define AESENCLAST ".byte 0x66,0x0F,0x38,0xDD,"
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#define AESIMC ".byte 0x66,0x0F,0x38,0xDB,"
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#define AESKEYGENA ".byte 0x66,0x0F,0x3A,0xDF,"
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#define PCLMULQDQ ".byte 0x66,0x0F,0x3A,0x44,"
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#define xmm0_xmm0 "0xC0"
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#define xmm0_xmm1 "0xC8"
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#define xmm0_xmm2 "0xD0"
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#define xmm0_xmm3 "0xD8"
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#define xmm0_xmm4 "0xE0"
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#define xmm1_xmm0 "0xC1"
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#define xmm1_xmm2 "0xD1"
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/*
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* AES-NI AES-ECB block en(de)cryption
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*/
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@ -76,22 +102,22 @@ int aesni_crypt_ecb( aes_context *ctx,
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"1: \n" // encryption loop
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"movdqu (%1), %%xmm1 \n" // load round key
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"aesenc %%xmm1, %%xmm0 \n" // do round
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AESENC xmm1_xmm0 "\n" // do round
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"addq $16, %1 \n" // point to next round key
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"subl $1, %0 \n" // loop
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"jnz 1b \n"
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"movdqu (%1), %%xmm1 \n" // load round key
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"aesenclast %%xmm1, %%xmm0 \n" // last round
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AESENCLAST xmm1_xmm0 "\n" // last round
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"jmp 3f \n"
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"2: \n" // decryption loop
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"movdqu (%1), %%xmm1 \n"
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"aesdec %%xmm1, %%xmm0 \n"
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AESDEC xmm1_xmm0 "\n" // do round
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"addq $16, %1 \n"
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"subl $1, %0 \n"
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"jnz 2b \n"
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"movdqu (%1), %%xmm1 \n" // load round key
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"aesdeclast %%xmm1, %%xmm0 \n" // last round
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AESDECLAST xmm1_xmm0 "\n" // last round
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"3: \n"
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"movdqu %%xmm0, (%4) \n" // export output
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@ -131,10 +157,10 @@ void aesni_gcm_mult( unsigned char c[16],
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"movdqa %%xmm1, %%xmm2 \n" // copy of b1:b0
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"movdqa %%xmm1, %%xmm3 \n" // same
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"movdqa %%xmm1, %%xmm4 \n" // same
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"pclmulqdq $0x00, %%xmm0, %%xmm1 \n" // a0*b0 = c1:c0
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"pclmulqdq $0x11, %%xmm0, %%xmm2 \n" // a1*b1 = d1:d0
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"pclmulqdq $0x10, %%xmm0, %%xmm3 \n" // a0*b1 = e1:e0
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"pclmulqdq $0x01, %%xmm0, %%xmm4 \n" // a1*b0 = f1:f0
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PCLMULQDQ xmm0_xmm1 ",0x00 \n" // a0*b0 = c1:c0
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PCLMULQDQ xmm0_xmm2 ",0x11 \n" // a1*b1 = d1:d0
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PCLMULQDQ xmm0_xmm3 ",0x10 \n" // a0*b1 = e1:e0
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PCLMULQDQ xmm0_xmm4 ",0x01 \n" // a1*b0 = f1:f0
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"pxor %%xmm3, %%xmm4 \n" // e1+f1:e0+f0
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"movdqa %%xmm4, %%xmm3 \n" // same
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"psrldq $8, %%xmm4 \n" // 0:e1+f1
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@ -228,7 +254,7 @@ void aesni_inverse_key( unsigned char *invkey,
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for( fk -= 16, ik += 16; fk > fwdkey; fk -= 16, ik += 16 )
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asm( "movdqu (%0), %%xmm0 \n"
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"aesimc %%xmm0, %%xmm0 \n"
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AESIMC xmm0_xmm0 "\n"
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"movdqu %%xmm0, (%1) \n"
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:
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: "r" (fk), "r" (ik)
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@ -272,16 +298,16 @@ static void aesni_setkey_enc_128( unsigned char *rk,
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/* Main "loop" */
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"2: \n"
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"aeskeygenassist $0x01, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x02, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x04, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x08, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x10, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x20, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x40, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x80, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x1B, %%xmm0, %%xmm1 \ncall 1b \n"
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"aeskeygenassist $0x36, %%xmm0, %%xmm1 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x01 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x02 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x04 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x08 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x10 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x20 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x40 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x80 \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x1B \ncall 1b \n"
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AESKEYGENA xmm0_xmm1 ",0x36 \ncall 1b \n"
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:
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: "r" (rk), "r" (key)
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: "memory", "cc", "0" );
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@ -330,14 +356,14 @@ static void aesni_setkey_enc_192( unsigned char *rk,
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"ret \n"
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"2: \n"
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"aeskeygenassist $0x01, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x02, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x04, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x08, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x10, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x20, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x40, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x80, %%xmm1, %%xmm2 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x01 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x02 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x04 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x08 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x10 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x20 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x40 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x80 \ncall 1b \n"
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:
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: "r" (rk), "r" (key)
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@ -380,7 +406,7 @@ static void aesni_setkey_enc_256( unsigned char *rk,
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/* Set xmm2 to stuff:Y:stuff:stuff with Y = subword( r11 )
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* and proceed to generate next round key from there */
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"aeskeygenassist $0, %%xmm0, %%xmm2\n"
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AESKEYGENA xmm0_xmm2 ",0x00 \n"
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"pshufd $0xaa, %%xmm2, %%xmm2 \n"
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"pxor %%xmm1, %%xmm2 \n"
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"pslldq $4, %%xmm1 \n"
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@ -398,13 +424,13 @@ static void aesni_setkey_enc_256( unsigned char *rk,
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* see definition of aes_context.buf
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*/
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"2: \n"
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"aeskeygenassist $0x01, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x02, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x04, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x08, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x10, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x20, %%xmm1, %%xmm2 \ncall 1b \n"
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"aeskeygenassist $0x40, %%xmm1, %%xmm2 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x01 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x02 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x04 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x08 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x10 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x20 \ncall 1b \n"
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AESKEYGENA xmm1_xmm2 ",0x40 \ncall 1b \n"
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:
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: "r" (rk), "r" (key)
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: "memory", "cc", "0" );
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