[PATCH v14 14/24] x86/asm/crypto: Create stack frames in aesni-intel_asm.S
From: Josh Poimboeuf
Date: Wed Oct 21 2015 - 12:18:08 EST
aesni-intel_asm.S has several callable non-leaf functions which don't
honor CONFIG_FRAME_POINTER, which can result in bad stack traces.
Create stack frames for them when CONFIG_FRAME_POINTER is enabled.
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Mathias Krause <minipli@xxxxxxxxxxx>
---
arch/x86/crypto/aesni-intel_asm.S | 73 ++++++++++++++++++++++++---------------
1 file changed, 46 insertions(+), 27 deletions(-)
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S
index 6bd2c6c..de656b1 100644
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -31,6 +31,7 @@
#include <linux/linkage.h>
#include <asm/inst.h>
+#include <asm/frame.h>
/*
* The following macros are used to move an (un)aligned 16 byte value to/from
@@ -1800,11 +1801,12 @@ ENDPROC(_key_expansion_256b)
* unsigned int key_len)
*/
ENTRY(aesni_set_key)
+ FRAME_BEGIN
#ifndef __x86_64__
pushl KEYP
- movl 8(%esp), KEYP # ctx
- movl 12(%esp), UKEYP # in_key
- movl 16(%esp), %edx # key_len
+ movl (FRAME_OFFSET+8)(%esp), KEYP # ctx
+ movl (FRAME_OFFSET+12)(%esp), UKEYP # in_key
+ movl (FRAME_OFFSET+16)(%esp), %edx # key_len
#endif
movups (UKEYP), %xmm0 # user key (first 16 bytes)
movaps %xmm0, (KEYP)
@@ -1905,6 +1907,7 @@ ENTRY(aesni_set_key)
#ifndef __x86_64__
popl KEYP
#endif
+ FRAME_END
ret
ENDPROC(aesni_set_key)
@@ -1912,12 +1915,13 @@ ENDPROC(aesni_set_key)
* void aesni_enc(struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
*/
ENTRY(aesni_enc)
+ FRAME_BEGIN
#ifndef __x86_64__
pushl KEYP
pushl KLEN
- movl 12(%esp), KEYP
- movl 16(%esp), OUTP
- movl 20(%esp), INP
+ movl (FRAME_OFFSET+12)(%esp), KEYP # ctx
+ movl (FRAME_OFFSET+16)(%esp), OUTP # dst
+ movl (FRAME_OFFSET+20)(%esp), INP # src
#endif
movl 480(KEYP), KLEN # key length
movups (INP), STATE # input
@@ -1927,6 +1931,7 @@ ENTRY(aesni_enc)
popl KLEN
popl KEYP
#endif
+ FRAME_END
ret
ENDPROC(aesni_enc)
@@ -2101,12 +2106,13 @@ ENDPROC(_aesni_enc4)
* void aesni_dec (struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
*/
ENTRY(aesni_dec)
+ FRAME_BEGIN
#ifndef __x86_64__
pushl KEYP
pushl KLEN
- movl 12(%esp), KEYP
- movl 16(%esp), OUTP
- movl 20(%esp), INP
+ movl (FRAME_OFFSET+12)(%esp), KEYP # ctx
+ movl (FRAME_OFFSET+16)(%esp), OUTP # dst
+ movl (FRAME_OFFSET+20)(%esp), INP # src
#endif
mov 480(KEYP), KLEN # key length
add $240, KEYP
@@ -2117,6 +2123,7 @@ ENTRY(aesni_dec)
popl KLEN
popl KEYP
#endif
+ FRAME_END
ret
ENDPROC(aesni_dec)
@@ -2292,14 +2299,15 @@ ENDPROC(_aesni_dec4)
* size_t len)
*/
ENTRY(aesni_ecb_enc)
+ FRAME_BEGIN
#ifndef __x86_64__
pushl LEN
pushl KEYP
pushl KLEN
- movl 16(%esp), KEYP
- movl 20(%esp), OUTP
- movl 24(%esp), INP
- movl 28(%esp), LEN
+ movl (FRAME_OFFSET+16)(%esp), KEYP # ctx
+ movl (FRAME_OFFSET+20)(%esp), OUTP # dst
+ movl (FRAME_OFFSET+24)(%esp), INP # src
+ movl (FRAME_OFFSET+28)(%esp), LEN # len
#endif
test LEN, LEN # check length
jz .Lecb_enc_ret
@@ -2342,6 +2350,7 @@ ENTRY(aesni_ecb_enc)
popl KEYP
popl LEN
#endif
+ FRAME_END
ret
ENDPROC(aesni_ecb_enc)
@@ -2350,14 +2359,15 @@ ENDPROC(aesni_ecb_enc)
* size_t len);
*/
ENTRY(aesni_ecb_dec)
+ FRAME_BEGIN
#ifndef __x86_64__
pushl LEN
pushl KEYP
pushl KLEN
- movl 16(%esp), KEYP
- movl 20(%esp), OUTP
- movl 24(%esp), INP
- movl 28(%esp), LEN
+ movl (FRAME_OFFSET+16)(%esp), KEYP # ctx
+ movl (FRAME_OFFSET+20)(%esp), OUTP # dst
+ movl (FRAME_OFFSET+24)(%esp), INP # src
+ movl (FRAME_OFFSET+28)(%esp), LEN # len
#endif
test LEN, LEN
jz .Lecb_dec_ret
@@ -2401,6 +2411,7 @@ ENTRY(aesni_ecb_dec)
popl KEYP
popl LEN
#endif
+ FRAME_END
ret
ENDPROC(aesni_ecb_dec)
@@ -2409,16 +2420,17 @@ ENDPROC(aesni_ecb_dec)
* size_t len, u8 *iv)
*/
ENTRY(aesni_cbc_enc)
+ FRAME_BEGIN
#ifndef __x86_64__
pushl IVP
pushl LEN
pushl KEYP
pushl KLEN
- movl 20(%esp), KEYP
- movl 24(%esp), OUTP
- movl 28(%esp), INP
- movl 32(%esp), LEN
- movl 36(%esp), IVP
+ movl (FRAME_OFFSET+20)(%esp), KEYP # ctx
+ movl (FRAME_OFFSET+24)(%esp), OUTP # dst
+ movl (FRAME_OFFSET+28)(%esp), INP # src
+ movl (FRAME_OFFSET+32)(%esp), LEN # len
+ movl (FRAME_OFFSET+36)(%esp), IVP # iv
#endif
cmp $16, LEN
jb .Lcbc_enc_ret
@@ -2443,6 +2455,7 @@ ENTRY(aesni_cbc_enc)
popl LEN
popl IVP
#endif
+ FRAME_END
ret
ENDPROC(aesni_cbc_enc)
@@ -2451,16 +2464,17 @@ ENDPROC(aesni_cbc_enc)
* size_t len, u8 *iv)
*/
ENTRY(aesni_cbc_dec)
+ FRAME_BEGIN
#ifndef __x86_64__
pushl IVP
pushl LEN
pushl KEYP
pushl KLEN
- movl 20(%esp), KEYP
- movl 24(%esp), OUTP
- movl 28(%esp), INP
- movl 32(%esp), LEN
- movl 36(%esp), IVP
+ movl (FRAME_OFFSET+20)(%esp), KEYP # ctx
+ movl (FRAME_OFFSET+24)(%esp), OUTP # dst
+ movl (FRAME_OFFSET+28)(%esp), INP # src
+ movl (FRAME_OFFSET+32)(%esp), LEN # len
+ movl (FRAME_OFFSET+36)(%esp), IVP # iv
#endif
cmp $16, LEN
jb .Lcbc_dec_just_ret
@@ -2534,6 +2548,7 @@ ENTRY(aesni_cbc_dec)
popl LEN
popl IVP
#endif
+ FRAME_END
ret
ENDPROC(aesni_cbc_dec)
@@ -2598,6 +2613,7 @@ ENDPROC(_aesni_inc)
* size_t len, u8 *iv)
*/
ENTRY(aesni_ctr_enc)
+ FRAME_BEGIN
cmp $16, LEN
jb .Lctr_enc_just_ret
mov 480(KEYP), KLEN
@@ -2651,6 +2667,7 @@ ENTRY(aesni_ctr_enc)
.Lctr_enc_ret:
movups IV, (IVP)
.Lctr_enc_just_ret:
+ FRAME_END
ret
ENDPROC(aesni_ctr_enc)
@@ -2677,6 +2694,7 @@ ENDPROC(aesni_ctr_enc)
* bool enc, u8 *iv)
*/
ENTRY(aesni_xts_crypt8)
+ FRAME_BEGIN
cmpb $0, %cl
movl $0, %ecx
movl $240, %r10d
@@ -2777,6 +2795,7 @@ ENTRY(aesni_xts_crypt8)
pxor INC, STATE4
movdqu STATE4, 0x70(OUTP)
+ FRAME_END
ret
ENDPROC(aesni_xts_crypt8)
--
2.4.3
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