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Date:   Sat, 14 May 2022 14:50:44 -0700
From:   Kees Cook <>
To:     Sami Tolvanen <>
Cc:, Josh Poimboeuf <>,
        Peter Zijlstra <>,,
        Catalin Marinas <>,
        Will Deacon <>,
        Mark Rutland <>,
        Nathan Chancellor <>,
        Nick Desaulniers <>,
        Joao Moreira <>,
        Sedat Dilek <>,
        Steven Rostedt <>,,,
Subject: Re: [RFC PATCH v2 09/21] arm64: Add types to indirect called
 assembly functions

On Fri, May 13, 2022 at 01:21:47PM -0700, Sami Tolvanen wrote:
> With CONFIG_CFI_CLANG, assembly functions indirectly called from C
> code must be annotated with type identifiers to pass CFI checking. Use
> SYM_TYPED_FUNC_START for indirectly called functions.
> Signed-off-by: Sami Tolvanen <>

Sort of related to my question about SYM_TYPED_FUNC_START itself, how
were these cases identified?

Reviewed-by: Kees Cook <>

Kees Cook

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