SHF

pub const SHF = packed struct(Word) {
    /// Section data should be writable during execution.
    WRITE: bool = false,
    /// Section occupies memory during program execution.
    ALLOC: bool = false,
    /// Section contains executable machine instructions.
    EXECINSTR: bool = false,
    unused3: u1 = 0,
    /// The data in this section may be merged.
    MERGE: bool = false,
    /// The data in this section is null-terminated strings.
    STRINGS: bool = false,
    /// A field in this section holds a section header table index.
    INFO_LINK: bool = false,
    /// Adds special ordering requirements for link editors.
    LINK_ORDER: bool = false,
    /// This section requires special OS-specific processing to avoid incorrect behavior.
    OS_NONCONFORMING: bool = false,
    /// This section is a member of a section group.
    GROUP: bool = false,
    /// This section holds Thread-Local Storage.
    TLS: bool = false,
    /// Identifies a section containing compressed data.
    COMPRESSED: bool = false,
    unused12: u8 = 0,
    OS: packed union {
        MASK: u8,
        GNU: packed struct(u8) {
            unused0: u1 = 0,
            /// Not to be GCed by the linker
            RETAIN: bool = false,
            unused2: u6 = 0,
        },
        MIPS: packed struct(u8) {
            unused0: u4 = 0,
            /// Section contains text/data which may be replicated in other sections.
            /// Linker must retain only one copy.
            NODUPES: bool = false,
            /// Linker must generate implicit hidden weak names.
            NAMES: bool = false,
            /// Section data local to process.
            LOCAL: bool = false,
            /// Do not strip this section.
            NOSTRIP: bool = false,
        },
        ARM: packed struct(u8) {
            unused0: u5 = 0,
            /// Make code section unreadable when in execute-only mode
            PURECODE: bool = false,
            unused6: u2 = 0,
        },
    } = .{ .MASK = 0 },
    PROC: packed union {
        MASK: u4,
        XCORE: packed struct(u4) {
            /// All sections with the "d" flag are grouped together by the linker to form
            /// the data section and the dp register is set to the start of the section by
            /// the boot code.
            DP_SECTION: bool = false,
            /// All sections with the "c" flag are grouped together by the linker to form
            /// the constant pool and the cp register is set to the start of the constant
            /// pool by the boot code.
            CP_SECTION: bool = false,
            unused2: u1 = 0,
            /// This section is excluded from the final executable or shared library.
            EXCLUDE: bool = false,
        },
        X86_64: packed struct(u4) {
            /// If an object file section does not have this flag set, then it may not hold
            /// more than 2GB and can be freely referred to in objects using smaller code
            /// models. Otherwise, only objects using larger code models can refer to them.
            /// For example, a medium code model object can refer to data in a section that
            /// sets this flag besides being able to refer to data in a section that does
            /// not set it; likewise, a small code model object can refer only to code in a
            /// section that does not set this flag.
            LARGE: bool = false,
            unused1: u2 = 0,
            /// This section is excluded from the final executable or shared library.
            EXCLUDE: bool = false,
        },
        HEX: packed struct(u4) {
            /// All sections with the GPREL flag are grouped into a global data area
            /// for faster accesses
            GPREL: bool = false,
            unused1: u2 = 0,
            /// This section is excluded from the final executable or shared library.
            EXCLUDE: bool = false,
        },
        MIPS: packed struct(u4) {
            /// All sections with the GPREL flag are grouped into a global data area
            /// for faster accesses
            GPREL: bool = false,
            /// This section should be merged.
            MERGE: bool = false,
            /// Address size to be inferred from section entry size.
            ADDR: bool = false,
            /// Section data is string data by default.
            STRING: bool = false,
        },
    } = .{ .MASK = 0 },
}