From c6da985e28d7071b187bd928e7fd41ba9e9f6aa7 Mon Sep 17 00:00:00 2001 From: Andrew Turner Date: Mon, 15 Apr 2024 21:53:39 +0100 Subject: [PATCH] Add the BTI elf note to the AArch64 SHA2 assembly On ELF platforms there is a note to specify when an application or library supports BTI. When linking one of these the linker needs all input object files to have the note. If not it will not include it in the output file. Normally the compiler would generate it, but for assembly files we need to do it our selves. Add the note to the aarch64 sha256 and sha512 assembly files. Tested by building with BTI enabled and using the -zbti-report=error flag to lld that makes it an error if the note is missing. Reviewed-by: Tino Reichardt Reviewed-by: Brian Behlendorf Signed-off-by: Andrew Turner Closes #16086 --- module/icp/asm-aarch64/sha2/sha256-armv8.S | 10 ++++++++++ module/icp/asm-aarch64/sha2/sha512-armv8.S | 10 ++++++++++ 2 files changed, 20 insertions(+) diff --git a/module/icp/asm-aarch64/sha2/sha256-armv8.S b/module/icp/asm-aarch64/sha2/sha256-armv8.S index 7ae486e4e229..4dcdd3b65d0b 100644 --- a/module/icp/asm-aarch64/sha2/sha256-armv8.S +++ b/module/icp/asm-aarch64/sha2/sha256-armv8.S @@ -21,6 +21,16 @@ #if defined(__aarch64__) + .section .note.gnu.property,"a",@note + .p2align 3 + .word 4 + .word 16 + .word 5 + .asciz "GNU" + .word 3221225472 + .word 4 + .word 3 + .word 0 .text .align 6 diff --git a/module/icp/asm-aarch64/sha2/sha512-armv8.S b/module/icp/asm-aarch64/sha2/sha512-armv8.S index 9c61eeee4d7b..f6c8f7742912 100644 --- a/module/icp/asm-aarch64/sha2/sha512-armv8.S +++ b/module/icp/asm-aarch64/sha2/sha512-armv8.S @@ -21,6 +21,16 @@ #if defined(__aarch64__) + .section .note.gnu.property,"a",@note + .p2align 3 + .word 4 + .word 16 + .word 5 + .asciz "GNU" + .word 3221225472 + .word 4 + .word 3 + .word 0 .text .align 6