diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2017-09-18 14:42:05 -0500 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-09-20 17:42:34 +0800 |
| commit | d7b1722c72aa915283ada27709c6feeb392f6038 (patch) | |
| tree | a5b78c49b6286a2d189c56da289a2b2a9b79329a /arch/x86/crypto/sha1_ssse3_asm.S | |
| parent | 3ed7b4d67c6745300c9b5c6baa55da1161b57f60 (diff) | |
| download | lwn-d7b1722c72aa915283ada27709c6feeb392f6038.tar.gz lwn-d7b1722c72aa915283ada27709c6feeb392f6038.zip | |
crypto: x86/sha1-avx2 - Fix RBP usage
Using RBP as a temporary register breaks frame pointer convention and
breaks stack traces when unwinding from an interrupt in the crypto code.
Use R11 instead of RBP. Since R11 isn't a callee-saved register, it
doesn't need to be saved and restored on the stack.
Reported-by: Eric Biggers <ebiggers@google.com>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Tested-by: Eric Biggers <ebiggers@google.com>
Acked-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86/crypto/sha1_ssse3_asm.S')
0 files changed, 0 insertions, 0 deletions