diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-02-24 10:29:21 -0600 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-04-19 12:36:35 -0500 |
| commit | 20114c899cafa8313534a841cab0ab1f7ab09672 (patch) | |
| tree | 52adfcee2ff7d6b78a9c5a4b5997324e15c5a928 /arch/x86/crypto | |
| parent | 35a0067d2c02a7c35466db5f207b7b9265de84d9 (diff) | |
x86/crypto/sha1_avx2: Standardize stack alignment prologue
Use a more standard prologue for saving the stack pointer before
realigning the stack.
This enables ORC unwinding by allowing objtool to understand the stack
realignment.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/fdaaf8670ed1f52f55ba9a6bbac98c1afddc1af6.1614182415.git.jpoimboe@redhat.com
Diffstat (limited to 'arch/x86/crypto')
| -rw-r--r-- | arch/x86/crypto/sha1_avx2_x86_64_asm.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/crypto/sha1_avx2_x86_64_asm.S b/arch/x86/crypto/sha1_avx2_x86_64_asm.S index 1e594d60afa5..5eed620f4676 100644 --- a/arch/x86/crypto/sha1_avx2_x86_64_asm.S +++ b/arch/x86/crypto/sha1_avx2_x86_64_asm.S @@ -645,9 +645,9 @@ _loop3: RESERVE_STACK = (W_SIZE*4 + 8+24) /* Align stack */ - mov %rsp, %rbx + push %rbp + mov %rsp, %rbp and $~(0x20-1), %rsp - push %rbx sub $RESERVE_STACK, %rsp avx2_zeroupper @@ -665,8 +665,8 @@ _loop3: avx2_zeroupper - add $RESERVE_STACK, %rsp - pop %rsp + mov %rbp, %rsp + pop %rbp pop %r15 pop %r14 |