Re: [PATCH 00/13] x86/crypto/asm: objtool support
From: Peter Zijlstra
Date: Thu Feb 25 2021 - 04:48:34 EST
On Wed, Feb 24, 2021 at 10:29:13AM -0600, Josh Poimboeuf wrote:
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Standardize the crypto asm to make it resemble compiler-generated code,
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so that objtool can understand it.
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This magically enables ORC unwinding from crypto code. It also fixes
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the last known remaining objtool warnings on vmlinux.o, for LTO and
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more.
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Josh Poimboeuf (13):
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objtool: Support asm jump tables
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x86/crypto/aesni-intel_avx: Remove unused macros
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x86/crypto/aesni-intel_avx: Fix register usage comments
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x86/crypto/aesni-intel_avx: Standardize stack alignment prologue
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x86/crypto/camellia-aesni-avx2: Unconditionally allocate stack buffer
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x86/crypto/crc32c-pcl-intel: Standardize jump table
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x86/crypto/sha_ni: Standardize stack alignment prologue
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x86/crypto/sha1_avx2: Standardize stack alignment prologue
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x86/crypto/sha256-avx2: Standardize stack alignment prologue
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x86/crypto/sha512-avx: Standardize stack alignment prologue
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x86/crypto/sha512-avx2: Standardize stack alignment prologue
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x86/crypto/sha512-ssse3: Standardize stack alignment prologue
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x86/crypto: Enable objtool in crypto code
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arch/x86/crypto/Makefile | 2 -
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arch/x86/crypto/aesni-intel_avx-x86_64.S | 28 +++++--------
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arch/x86/crypto/camellia-aesni-avx2-asm_64.S | 5 +--
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arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 7 +---
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arch/x86/crypto/sha1_avx2_x86_64_asm.S | 8 ++--
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arch/x86/crypto/sha1_ni_asm.S | 8 ++--
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arch/x86/crypto/sha256-avx2-asm.S | 13 +++---
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arch/x86/crypto/sha512-avx-asm.S | 41 +++++++++----------
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arch/x86/crypto/sha512-avx2-asm.S | 42 ++++++++++----------
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arch/x86/crypto/sha512-ssse3-asm.S | 41 +++++++++----------
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tools/objtool/check.c | 14 ++++++-
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11 files changed, 98 insertions(+), 111 deletions(-)
One nit, there's lots and lots of:
mov %rbp, %rsp
pop %rbp
and we have this 'leave' instruction that does exactly that, should we
be using it?
Otherwise:
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>