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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-02-24 10:29:24 -0600 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-04-19 12:36:36 -0500 |
| commit | ec063e090bd6487097d459bb4272508b78448270 (patch) | |
| tree | 94479544aca52583ec0ea592342799dea2be7c85 /arch/x86/crypto | |
| parent | d61684b56edf369f0a6d388088d7c9d59f1618d4 (diff) | |
| download | linux-stable-ec063e090bd6487097d459bb4272508b78448270.tar.gz linux-stable-ec063e090bd6487097d459bb4272508b78448270.tar.bz2 linux-stable-ec063e090bd6487097d459bb4272508b78448270.zip | |
x86/crypto/sha512-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/b1a7b29fcfc65d60a3b6e77ef75f4762a5b8488d.1614182415.git.jpoimboe@redhat.com
Diffstat (limited to 'arch/x86/crypto')
| -rw-r--r-- | arch/x86/crypto/sha512-avx2-asm.S | 42 |
1 files changed, 20 insertions, 22 deletions
diff --git a/arch/x86/crypto/sha512-avx2-asm.S b/arch/x86/crypto/sha512-avx2-asm.S index 3a44bdcfd583..072cb0f0deae 100644 --- a/arch/x86/crypto/sha512-avx2-asm.S +++ b/arch/x86/crypto/sha512-avx2-asm.S @@ -102,17 +102,13 @@ SRND_SIZE = 1*8 INP_SIZE = 1*8 INPEND_SIZE = 1*8 CTX_SIZE = 1*8 -RSPSAVE_SIZE = 1*8 -GPRSAVE_SIZE = 5*8 frame_XFER = 0 frame_SRND = frame_XFER + XFER_SIZE frame_INP = frame_SRND + SRND_SIZE frame_INPEND = frame_INP + INP_SIZE frame_CTX = frame_INPEND + INPEND_SIZE -frame_RSPSAVE = frame_CTX + CTX_SIZE -frame_GPRSAVE = frame_RSPSAVE + RSPSAVE_SIZE -frame_size = frame_GPRSAVE + GPRSAVE_SIZE +frame_size = frame_CTX + CTX_SIZE ## assume buffers not aligned #define VMOVDQ vmovdqu @@ -570,18 +566,18 @@ frame_size = frame_GPRSAVE + GPRSAVE_SIZE # "blocks" is the message length in SHA512 blocks ######################################################################## SYM_FUNC_START(sha512_transform_rorx) + # Save GPRs + push %rbx + push %r12 + push %r13 + push %r14 + push %r15 + # Allocate Stack Space - mov %rsp, %rax + push %rbp + mov %rsp, %rbp sub $frame_size, %rsp and $~(0x20 - 1), %rsp - mov %rax, frame_RSPSAVE(%rsp) - - # Save GPRs - mov %rbx, 8*0+frame_GPRSAVE(%rsp) - mov %r12, 8*1+frame_GPRSAVE(%rsp) - mov %r13, 8*2+frame_GPRSAVE(%rsp) - mov %r14, 8*3+frame_GPRSAVE(%rsp) - mov %r15, 8*4+frame_GPRSAVE(%rsp) shl $7, NUM_BLKS # convert to bytes jz done_hash @@ -672,15 +668,17 @@ loop2: done_hash: -# Restore GPRs - mov 8*0+frame_GPRSAVE(%rsp), %rbx - mov 8*1+frame_GPRSAVE(%rsp), %r12 - mov 8*2+frame_GPRSAVE(%rsp), %r13 - mov 8*3+frame_GPRSAVE(%rsp), %r14 - mov 8*4+frame_GPRSAVE(%rsp), %r15 - # Restore Stack Pointer - mov frame_RSPSAVE(%rsp), %rsp + mov %rbp, %rsp + pop %rbp + + # Restore GPRs + pop %r15 + pop %r14 + pop %r13 + pop %r12 + pop %rbx + ret SYM_FUNC_END(sha512_transform_rorx) |