crypto: x86/chacha20 - satisfy stack validation 2.0

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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: baa41469a7 ("objtool: Implement stack validation 2.0")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Jason A. Donenfeld 2017-10-08 22:50:53 +02:00 • committed by Herbert Xu

parent b61907bb42

commit 4635742d1c

2 changed files with 4 additions and 4 deletions

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4

arch/x86/crypto/chacha20-avx2-x86_64.S

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4

arch/x86/crypto/chacha20-ssse3-x86_64.S

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