diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-02-24 10:29:20 -0600 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-04-19 12:36:35 -0500 |
| commit | 35a0067d2c02a7c35466db5f207b7b9265de84d9 (patch) | |
| tree | 5bf28a4a40596c6fa434020e9f832a291d133395 /arch | |
| parent | 2b02ed55482a1c5c310a7f53707292fcf1601e7a (diff) | |
x86/crypto/sha_ni: 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/5033e1a79867dff1b18e1b4d0783c38897d3f223.1614182415.git.jpoimboe@redhat.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/crypto/sha1_ni_asm.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/crypto/sha1_ni_asm.S b/arch/x86/crypto/sha1_ni_asm.S index 11efe3a45a1f..5d8415f482bd 100644 --- a/arch/x86/crypto/sha1_ni_asm.S +++ b/arch/x86/crypto/sha1_ni_asm.S @@ -59,8 +59,6 @@ #define DATA_PTR %rsi /* 2nd arg */ #define NUM_BLKS %rdx /* 3rd arg */ -#define RSPSAVE %rax - /* gcc conversion */ #define FRAME_SIZE 32 /* space for 2x16 bytes */ @@ -96,7 +94,8 @@ .text .align 32 SYM_FUNC_START(sha1_ni_transform) - mov %rsp, RSPSAVE + push %rbp + mov %rsp, %rbp sub $FRAME_SIZE, %rsp and $~0xF, %rsp @@ -288,7 +287,8 @@ SYM_FUNC_START(sha1_ni_transform) pextrd $3, E0, 1*16(DIGEST_PTR) .Ldone_hash: - mov RSPSAVE, %rsp + mov %rbp, %rsp + pop %rbp ret SYM_FUNC_END(sha1_ni_transform) |