• Christophe Leroy's avatar
    powerpc: prepare string/mem functions for KASAN · 26deb043
    Christophe Leroy authored
    CONFIG_KASAN implements wrappers for memcpy() memmove() and memset()
    Those wrappers are doing the verification then call respectively
    __memcpy() __memmove() and __memset(). The arches are therefore
    expected to rename their optimised functions that way.
    
    For files on which KASAN is inhibited, #defines are used to allow
    them to directly call optimised versions of the functions without
    going through the KASAN wrappers.
    
    See commit 393f203f ("x86_64: kasan: add interceptors for
    memset/memmove/memcpy functions") for details.
    
    Other string / mem functions do not (yet) have kasan wrappers,
    we therefore have to fallback to the generic versions when
    KASAN is active, otherwise KASAN checks will be skipped.
    Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
    [mpe: Fixups to keep selftests working]
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    26deb043
mem_64.S 2.41 KB