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    Subject[PATCH 5.11 001/775] vmlinux.lds.h: add DWARF v5 sections
    Date
    From: Nick Desaulniers <ndesaulniers@google.com>

    commit 3c4fa46b30c551b1df2fb1574a684f68bc22067c upstream.

    We expect toolchains to produce these new debug info sections as part of
    DWARF v5. Add explicit placements to prevent the linker warnings from
    --orphan-section=warn.

    Compilers may produce such sections with explicit -gdwarf-5, or based on
    the implicit default version of DWARF when -g is used via DEBUG_INFO.
    This implicit default changes over time, and has changed to DWARF v5
    with GCC 11.

    .debug_sup was mentioned in review, but without compilers producing it
    today, let's wait to add it until it becomes necessary.

    Cc: stable@vger.kernel.org
    Link: https://bugzilla.redhat.com/show_bug.cgi?id=1922707
    Reported-by: Chris Murphy <lists@colorremedies.com>
    Suggested-by: Fangrui Song <maskray@google.com>
    Reviewed-by: Nathan Chancellor <nathan@kernel.org>
    Reviewed-by: Mark Wielaard <mark@klomp.org>
    Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
    Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
    Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    include/asm-generic/vmlinux.lds.h | 7 ++++++-
    1 file changed, 6 insertions(+), 1 deletion(-)

    --- a/include/asm-generic/vmlinux.lds.h
    +++ b/include/asm-generic/vmlinux.lds.h
    @@ -828,8 +828,13 @@
    /* DWARF 4 */ \
    .debug_types 0 : { *(.debug_types) } \
    /* DWARF 5 */ \
    + .debug_addr 0 : { *(.debug_addr) } \
    + .debug_line_str 0 : { *(.debug_line_str) } \
    + .debug_loclists 0 : { *(.debug_loclists) } \
    .debug_macro 0 : { *(.debug_macro) } \
    - .debug_addr 0 : { *(.debug_addr) }
    + .debug_names 0 : { *(.debug_names) } \
    + .debug_rnglists 0 : { *(.debug_rnglists) } \
    + .debug_str_offsets 0 : { *(.debug_str_offsets) }

    /* Stabs debugging sections. */
    #define STABS_DEBUG \

    \
     
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