The following commit has been merged into the objtool/core branch of tip: Commit-ID: 2b02ed55482a1c5c310a7f53707292fcf1601e7a Gitweb: https://git.kernel.org/tip/2b02ed55482a1c5c310a7f53707292fcf1601e7a Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> AuthorDate: Wed, 24 Feb 2021 10:29:19 -06:00 Committer: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> CommitterDate: Mon, 19 Apr 2021 12:36:34 -05:00 x86/crypto/crc32c-pcl-intel: Standardize jump table Simplify the jump table code so that it resembles a compiler-generated table. This enables ORC unwinding by allowing objtool to follow all the potential code paths. Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Tested-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Tested-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Acked-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/5357a039def90b8ef6b5874ef12cda008ecf18ba.1614182415.git.jpoimboe@xxxxxxxxxx --- arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S index 884dc76..ac1f303 100644 --- a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S +++ b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S @@ -53,7 +53,7 @@ .endm .macro JMPTBL_ENTRY i -.word crc_\i - crc_array +.quad crc_\i .endm .macro JNC_LESS_THAN j @@ -168,10 +168,7 @@ continue_block: xor crc2, crc2 ## branch into array - lea jump_table(%rip), %bufp - movzwq (%bufp, %rax, 2), len - lea crc_array(%rip), %bufp - lea (%bufp, len, 1), %bufp + mov jump_table(,%rax,8), %bufp JMP_NOSPEC bufp ################################################################
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