Use the frame_push and frame_pop macros to create the stack frames in
the AES chaining mode wrappers so that they will get PAC and/or shadow
call stack protection when configured.
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
arch/arm64/crypto/aes-modes.S | 34 +++++++-------------
1 file changed, 12 insertions(+), 22 deletions(-)
diff --git a/arch/arm64/crypto/aes-modes.S b/arch/arm64/crypto/aes-modes.S
index 5abc834271f4a610..0e834a2c062cf265 100644
--- a/arch/arm64/crypto/aes-modes.S
+++ b/arch/arm64/crypto/aes-modes.S
@@ -52,8 +52,7 @@ SYM_FUNC_END(aes_decrypt_block5x)
*/
AES_FUNC_START(aes_ecb_encrypt)
- stp x29, x30, [sp, #-16]!
- mov x29, sp
+ frame_push 0
enc_prepare w3, x2, x5
@@ -77,14 +76,13 @@ ST5( st1 {v4.16b}, [x0], #16 )
subs w4, w4, #1
bne .Lecbencloop
.Lecbencout:
- ldp x29, x30, [sp], #16
+ frame_pop
ret
AES_FUNC_END(aes_ecb_encrypt)
AES_FUNC_START(aes_ecb_decrypt)
- stp x29, x30, [sp, #-16]!
- mov x29, sp
+ frame_push 0
dec_prepare w3, x2, x5
@@ -108,7 +106,7 @@ ST5( st1 {v4.16b}, [x0], #16 )
subs w4, w4, #1
bne .Lecbdecloop
.Lecbdecout:
- ldp x29, x30, [sp], #16
+ frame_pop
ret
AES_FUNC_END(aes_ecb_decrypt)
@@ -171,9 +169,6 @@ AES_FUNC_END(aes_cbc_encrypt)
AES_FUNC_END(aes_essiv_cbc_encrypt)
AES_FUNC_START(aes_essiv_cbc_decrypt)
- stp x29, x30, [sp, #-16]!
- mov x29, sp
-
ld1 {cbciv.16b}, [x5] /* get iv */
mov w8, #14 /* AES-256: 14 rounds */
@@ -182,11 +177,9 @@ AES_FUNC_START(aes_essiv_cbc_decrypt)
b .Lessivcbcdecstart
AES_FUNC_START(aes_cbc_decrypt)
- stp x29, x30, [sp, #-16]!
- mov x29, sp
-
ld1 {cbciv.16b}, [x5] /* get iv */
.Lessivcbcdecstart:
+ frame_push 0
dec_prepare w3, x2, x6
.LcbcdecloopNx:
@@ -236,7 +229,7 @@ ST5( st1 {v4.16b}, [x0], #16 )
bne .Lcbcdecloop
.Lcbcdecout:
st1 {cbciv.16b}, [x5] /* return iv */
- ldp x29, x30, [sp], #16
+ frame_pop
ret
AES_FUNC_END(aes_cbc_decrypt)
AES_FUNC_END(aes_essiv_cbc_decrypt)
@@ -337,8 +330,7 @@ AES_FUNC_END(aes_cbc_cts_decrypt)
BLOCKS .req x13
BLOCKS_W .req w13
- stp x29, x30, [sp, #-16]!
- mov x29, sp
+ frame_push 0
enc_prepare ROUNDS_W, KEY, IV_PART
ld1 {vctr.16b}, [IV]
@@ -481,7 +473,7 @@ ST5( st1 {v4.16b}, [OUT], #16 )
.if !\xctr
st1 {vctr.16b}, [IV] /* return next CTR value */
.endif
- ldp x29, x30, [sp], #16
+ frame_pop
ret
.Lctrtail\xctr:
@@ -645,8 +637,7 @@ AES_FUNC_END(aes_xctr_encrypt)
.endm
AES_FUNC_START(aes_xts_encrypt)
- stp x29, x30, [sp, #-16]!
- mov x29, sp
+ frame_push 0
ld1 {v4.16b}, [x6]
xts_load_mask v8
@@ -704,7 +695,7 @@ AES_FUNC_START(aes_xts_encrypt)
st1 {v0.16b}, [x0]
.Lxtsencret:
st1 {v4.16b}, [x6]
- ldp x29, x30, [sp], #16
+ frame_pop
ret
.LxtsencctsNx:
@@ -732,8 +723,7 @@ AES_FUNC_START(aes_xts_encrypt)
AES_FUNC_END(aes_xts_encrypt)
AES_FUNC_START(aes_xts_decrypt)
- stp x29, x30, [sp, #-16]!
- mov x29, sp
+ frame_push 0
/* subtract 16 bytes if we are doing CTS */
sub w8, w4, #0x10
@@ -794,7 +784,7 @@ AES_FUNC_START(aes_xts_decrypt)
b .Lxtsdecloop
.Lxtsdecout:
st1 {v4.16b}, [x6]
- ldp x29, x30, [sp], #16
+ frame_pop
ret
.Lxtsdeccts:
--
2.35.1
