Commit e163be86 authored by Josh Poimboeuf's avatar Josh Poimboeuf
Browse files

x86/crypto/aesni-intel_avx: Standardize stack alignment prologue 



Use RBP instead of R14 for saving the old stack pointer before
realignment.  This resembles what compilers normally do.

This enables ORC unwinding by allowing objtool to understand the stack
realignment.

Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
Tested-by: default avatarArd Biesheuvel <ardb@kernel.org>
Acked-by: default avatarArd Biesheuvel <ardb@kernel.org>
Tested-by: default avatarSami Tolvanen <samitolvanen@google.com>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Link: https://lore.kernel.org/r/02d00a0903a0959f4787e186e2a07d271e1f63d4.1614182415.git.jpoimboe@redhat.com
parent ff5796b6

arch/x86/crypto/aesni-intel_avx-x86_64.S

+4 −6
Original line number Diff line number Diff line
@@ -251,22 +251,20 @@ VARIABLE_OFFSET = 16*8 
.macro FUNC_SAVE

        push    %r12

        push    %r13

        push    %r14

        push    %r15



        mov     %rsp, %r14





	push	%rbp

	mov	%rsp, %rbp



        sub     $VARIABLE_OFFSET, %rsp

        and     $~63, %rsp                    # align rsp to 64 bytes

.endm



.macro FUNC_RESTORE

        mov     %r14, %rsp

        mov     %rbp, %rsp

	pop	%rbp



        pop     %r15

        pop     %r14

        pop     %r13

        pop     %r12

.endm