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author | Jason A. Donenfeld <Jason@zx2c4.com> | 2017-10-08 22:50:53 +0200 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-10-12 22:51:16 +0800 |
commit | 4635742d1cef5ee5f217f89310a8782ebb4e25dd (patch) | |
tree | 21f54e060311132e108c05b48686ca3d2e3d4db0 /arch/x86/crypto/chacha20-ssse3-x86_64.S | |
parent | b61907bb42409adf9b3120f741af7c57dd7e3db2 (diff) | |
download | op-kernel-dev-4635742d1cef5ee5f217f89310a8782ebb4e25dd.zip op-kernel-dev-4635742d1cef5ee5f217f89310a8782ebb4e25dd.tar.gz |
crypto: x86/chacha20 - satisfy stack validation 2.0
The new stack validator in objdump doesn't like directly assigning r11
to rsp, warning with something like:
warning: objtool: chacha20_4block_xor_ssse3()+0xa: unsupported stack pointer realignment
warning: objtool: chacha20_8block_xor_avx2()+0x6: unsupported stack pointer realignment
This fixes things up to use code similar to gcc's DRAP register, so that
objdump remains happy.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Fixes: baa41469a7b9 ("objtool: Implement stack validation 2.0")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86/crypto/chacha20-ssse3-x86_64.S')
-rw-r--r-- | arch/x86/crypto/chacha20-ssse3-x86_64.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/crypto/chacha20-ssse3-x86_64.S b/arch/x86/crypto/chacha20-ssse3-x86_64.S index 3f511a7..512a2b5 100644 --- a/arch/x86/crypto/chacha20-ssse3-x86_64.S +++ b/arch/x86/crypto/chacha20-ssse3-x86_64.S @@ -160,7 +160,7 @@ ENTRY(chacha20_4block_xor_ssse3) # done with the slightly better performing SSSE3 byte shuffling, # 7/12-bit word rotation uses traditional shift+OR. - mov %rsp,%r11 + lea 8(%rsp),%r10 sub $0x80,%rsp and $~63,%rsp @@ -625,6 +625,6 @@ ENTRY(chacha20_4block_xor_ssse3) pxor %xmm1,%xmm15 movdqu %xmm15,0xf0(%rsi) - mov %r11,%rsp + lea -8(%r10),%rsp ret ENDPROC(chacha20_4block_xor_ssse3) |