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    Subject[RFC v4 16/18] arm64: crypto: Add exceptions for crypto object to prevent stack analysis
    Date
    Some crypto modules contain `.word` of data in the .text section.
    Since objtool can't make the distinction between data and incorrect
    instruction, it gives a warning about the instruction beeing unknown
    and stops the analysis of the object file.

    The exception can be removed if the data are moved to another section
    or if objtool is tweaked to handle this particular case.

    Signed-off-by: Raphael Gault <raphael.gault@arm.com>
    ---
    arch/arm64/crypto/Makefile | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile
    index 0435f2a0610e..e2a25919ebaa 100644
    --- a/arch/arm64/crypto/Makefile
    +++ b/arch/arm64/crypto/Makefile
    @@ -43,9 +43,11 @@ aes-neon-blk-y := aes-glue-neon.o aes-neon.o

    obj-$(CONFIG_CRYPTO_SHA256_ARM64) += sha256-arm64.o
    sha256-arm64-y := sha256-glue.o sha256-core.o
    +OBJECT_FILES_NON_STANDARD_sha256-core.o := y

    obj-$(CONFIG_CRYPTO_SHA512_ARM64) += sha512-arm64.o
    sha512-arm64-y := sha512-glue.o sha512-core.o
    +OBJECT_FILES_NON_STANDARD_sha512-core.o := y

    obj-$(CONFIG_CRYPTO_CHACHA20_NEON) += chacha-neon.o
    chacha-neon-y := chacha-neon-core.o chacha-neon-glue.o
    @@ -58,6 +60,7 @@ aes-arm64-y := aes-cipher-core.o aes-cipher-glue.o

    obj-$(CONFIG_CRYPTO_AES_ARM64_BS) += aes-neon-bs.o
    aes-neon-bs-y := aes-neonbs-core.o aes-neonbs-glue.o
    +OBJECT_FILES_NON_STANDARD_aes-neonbs-core.o := y

    CFLAGS_aes-glue-ce.o := -DUSE_V8_CRYPTO_EXTENSIONS

    --
    2.17.1
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