const std = @import("std.zig");
const io = std.io;
const os = std.os;
const math = std.math;
const mem = std.mem;
const assert = std.debug.assert;
const File = std.fs.File;
const native_endian = @import("builtin").target.cpu.arch.endian();
pub const AT_NULL = 0;
pub const AT_IGNORE = 1;
pub const AT_EXECFD = 2;
pub const AT_PHDR = 3;
pub const AT_PHENT = 4;
pub const AT_PHNUM = 5;
pub const AT_PAGESZ = 6;
pub const AT_BASE = 7;
pub const AT_FLAGS = 8;
pub const AT_ENTRY = 9;
pub const AT_NOTELF = 10;
pub const AT_UID = 11;
pub const AT_EUID = 12;
pub const AT_GID = 13;
pub const AT_EGID = 14;
pub const AT_CLKTCK = 17;
pub const AT_PLATFORM = 15;
pub const AT_HWCAP = 16;
pub const AT_FPUCW = 18;
pub const AT_DCACHEBSIZE = 19;
pub const AT_ICACHEBSIZE = 20;
pub const AT_UCACHEBSIZE = 21;
pub const AT_IGNOREPPC = 22;
pub const AT_SECURE = 23;
pub const AT_BASE_PLATFORM = 24;
pub const AT_RANDOM = 25;
pub const AT_HWCAP2 = 26;
pub const AT_EXECFN = 31;
pub const AT_SYSINFO = 32;
pub const AT_SYSINFO_EHDR = 33;
pub const AT_L1I_CACHESHAPE = 34;
pub const AT_L1D_CACHESHAPE = 35;
pub const AT_L2_CACHESHAPE = 36;
pub const AT_L3_CACHESHAPE = 37;
pub const AT_L1I_CACHESIZE = 40;
pub const AT_L1I_CACHEGEOMETRY = 41;
pub const AT_L1D_CACHESIZE = 42;
pub const AT_L1D_CACHEGEOMETRY = 43;
pub const AT_L2_CACHESIZE = 44;
pub const AT_L2_CACHEGEOMETRY = 45;
pub const AT_L3_CACHESIZE = 46;
pub const AT_L3_CACHEGEOMETRY = 47;
pub const DT_NULL = 0;
pub const DT_NEEDED = 1;
pub const DT_PLTRELSZ = 2;
pub const DT_PLTGOT = 3;
pub const DT_HASH = 4;
pub const DT_STRTAB = 5;
pub const DT_SYMTAB = 6;
pub const DT_RELA = 7;
pub const DT_RELASZ = 8;
pub const DT_RELAENT = 9;
pub const DT_STRSZ = 10;
pub const DT_SYMENT = 11;
pub const DT_INIT = 12;
pub const DT_FINI = 13;
pub const DT_SONAME = 14;
pub const DT_RPATH = 15;
pub const DT_SYMBOLIC = 16;
pub const DT_REL = 17;
pub const DT_RELSZ = 18;
pub const DT_RELENT = 19;
pub const DT_PLTREL = 20;
pub const DT_DEBUG = 21;
pub const DT_TEXTREL = 22;
pub const DT_JMPREL = 23;
pub const DT_BIND_NOW = 24;
pub const DT_INIT_ARRAY = 25;
pub const DT_FINI_ARRAY = 26;
pub const DT_INIT_ARRAYSZ = 27;
pub const DT_FINI_ARRAYSZ = 28;
pub const DT_RUNPATH = 29;
pub const DT_FLAGS = 30;
pub const DT_ENCODING = 32;
pub const DT_PREINIT_ARRAY = 32;
pub const DT_PREINIT_ARRAYSZ = 33;
pub const DT_SYMTAB_SHNDX = 34;
pub const DT_NUM = 35;
pub const DT_LOOS = 0x6000000d;
pub const DT_HIOS = 0x6ffff000;
pub const DT_LOPROC = 0x70000000;
pub const DT_HIPROC = 0x7fffffff;
pub const DT_PROCNUM = DT_MIPS_NUM;
pub const DT_VALRNGLO = 0x6ffffd00;
pub const DT_GNU_PRELINKED = 0x6ffffdf5;
pub const DT_GNU_CONFLICTSZ = 0x6ffffdf6;
pub const DT_GNU_LIBLISTSZ = 0x6ffffdf7;
pub const DT_CHECKSUM = 0x6ffffdf8;
pub const DT_PLTPADSZ = 0x6ffffdf9;
pub const DT_MOVEENT = 0x6ffffdfa;
pub const DT_MOVESZ = 0x6ffffdfb;
pub const DT_FEATURE_1 = 0x6ffffdfc;
pub const DT_POSFLAG_1 = 0x6ffffdfd;
pub const DT_SYMINSZ = 0x6ffffdfe;
pub const DT_SYMINENT = 0x6ffffdff;
pub const DT_VALRNGHI = 0x6ffffdff;
pub const DT_VALNUM = 12;
pub const DT_ADDRRNGLO = 0x6ffffe00;
pub const DT_GNU_HASH = 0x6ffffef5;
pub const DT_TLSDESC_PLT = 0x6ffffef6;
pub const DT_TLSDESC_GOT = 0x6ffffef7;
pub const DT_GNU_CONFLICT = 0x6ffffef8;
pub const DT_GNU_LIBLIST = 0x6ffffef9;
pub const DT_CONFIG = 0x6ffffefa;
pub const DT_DEPAUDIT = 0x6ffffefb;
pub const DT_AUDIT = 0x6ffffefc;
pub const DT_PLTPAD = 0x6ffffefd;
pub const DT_MOVETAB = 0x6ffffefe;
pub const DT_SYMINFO = 0x6ffffeff;
pub const DT_ADDRRNGHI = 0x6ffffeff;
pub const DT_ADDRNUM = 11;
pub const DT_VERSYM = 0x6ffffff0;
pub const DT_RELACOUNT = 0x6ffffff9;
pub const DT_RELCOUNT = 0x6ffffffa;
pub const DT_FLAGS_1 = 0x6ffffffb;
pub const DT_VERDEF = 0x6ffffffc;
pub const DT_VERDEFNUM = 0x6ffffffd;
pub const DT_VERNEED = 0x6ffffffe;
pub const DT_VERNEEDNUM = 0x6fffffff;
pub const DT_VERSIONTAGNUM = 16;
pub const DT_AUXILIARY = 0x7ffffffd;
pub const DT_FILTER = 0x7fffffff;
pub const DT_EXTRANUM = 3;
pub const DT_SPARC_REGISTER = 0x70000001;
pub const DT_SPARC_NUM = 2;
pub const DT_MIPS_RLD_VERSION = 0x70000001;
pub const DT_MIPS_TIME_STAMP = 0x70000002;
pub const DT_MIPS_ICHECKSUM = 0x70000003;
pub const DT_MIPS_IVERSION = 0x70000004;
pub const DT_MIPS_FLAGS = 0x70000005;
pub const DT_MIPS_BASE_ADDRESS = 0x70000006;
pub const DT_MIPS_MSYM = 0x70000007;
pub const DT_MIPS_CONFLICT = 0x70000008;
pub const DT_MIPS_LIBLIST = 0x70000009;
pub const DT_MIPS_LOCAL_GOTNO = 0x7000000a;
pub const DT_MIPS_CONFLICTNO = 0x7000000b;
pub const DT_MIPS_LIBLISTNO = 0x70000010;
pub const DT_MIPS_SYMTABNO = 0x70000011;
pub const DT_MIPS_UNREFEXTNO = 0x70000012;
pub const DT_MIPS_GOTSYM = 0x70000013;
pub const DT_MIPS_HIPAGENO = 0x70000014;
pub const DT_MIPS_RLD_MAP = 0x70000016;
pub const DT_MIPS_DELTA_CLASS = 0x70000017;
pub const DT_MIPS_DELTA_CLASS_NO = 0x70000018;
pub const DT_MIPS_DELTA_INSTANCE = 0x70000019;
pub const DT_MIPS_DELTA_INSTANCE_NO = 0x7000001a;
pub const DT_MIPS_DELTA_RELOC = 0x7000001b;
pub const DT_MIPS_DELTA_RELOC_NO = 0x7000001c;
pub const DT_MIPS_DELTA_SYM = 0x7000001d;
pub const DT_MIPS_DELTA_SYM_NO = 0x7000001e;
pub const DT_MIPS_DELTA_CLASSSYM = 0x70000020;
pub const DT_MIPS_DELTA_CLASSSYM_NO = 0x70000021;
pub const DT_MIPS_CXX_FLAGS = 0x70000022;
pub const DT_MIPS_PIXIE_INIT = 0x70000023;
pub const DT_MIPS_SYMBOL_LIB = 0x70000024;
pub const DT_MIPS_LOCALPAGE_GOTIDX = 0x70000025;
pub const DT_MIPS_LOCAL_GOTIDX = 0x70000026;
pub const DT_MIPS_HIDDEN_GOTIDX = 0x70000027;
pub const DT_MIPS_PROTECTED_GOTIDX = 0x70000028;
pub const DT_MIPS_OPTIONS = 0x70000029;
pub const DT_MIPS_INTERFACE = 0x7000002a;
pub const DT_MIPS_DYNSTR_ALIGN = 0x7000002b;
pub const DT_MIPS_INTERFACE_SIZE = 0x7000002c;
pub const DT_MIPS_RLD_TEXT_RESOLVE_ADDR = 0x7000002d;
pub const DT_MIPS_PERF_SUFFIX = 0x7000002e;
pub const DT_MIPS_COMPACT_SIZE = 0x7000002f;
pub const DT_MIPS_GP_VALUE = 0x70000030;
pub const DT_MIPS_AUX_DYNAMIC = 0x70000031;
pub const DT_MIPS_PLTGOT = 0x70000032;
pub const DT_MIPS_RWPLT = 0x70000034;
pub const DT_MIPS_RLD_MAP_REL = 0x70000035;
pub const DT_MIPS_NUM = 0x36;
pub const DT_ALPHA_PLTRO = (DT_LOPROC + 0);
pub const DT_ALPHA_NUM = 1;
pub const DT_PPC_GOT = (DT_LOPROC + 0);
pub const DT_PPC_OPT = (DT_LOPROC + 1);
pub const DT_PPC_NUM = 2;
pub const DT_PPC64_GLINK = (DT_LOPROC + 0);
pub const DT_PPC64_OPD = (DT_LOPROC + 1);
pub const DT_PPC64_OPDSZ = (DT_LOPROC + 2);
pub const DT_PPC64_OPT = (DT_LOPROC + 3);
pub const DT_PPC64_NUM = 4;
pub const DT_IA_64_PLT_RESERVE = (DT_LOPROC + 0);
pub const DT_IA_64_NUM = 1;
pub const DT_NIOS2_GP = 0x70000002;
pub const PT_NULL = 0;
pub const PT_LOAD = 1;
pub const PT_DYNAMIC = 2;
pub const PT_INTERP = 3;
pub const PT_NOTE = 4;
pub const PT_SHLIB = 5;
pub const PT_PHDR = 6;
pub const PT_TLS = 7;
pub const PT_NUM = 8;
pub const PT_LOOS = 0x60000000;
pub const PT_GNU_EH_FRAME = 0x6474e550;
pub const PT_GNU_STACK = 0x6474e551;
pub const PT_GNU_RELRO = 0x6474e552;
pub const PT_LOSUNW = 0x6ffffffa;
pub const PT_SUNWBSS = 0x6ffffffa;
pub const PT_SUNWSTACK = 0x6ffffffb;
pub const PT_HISUNW = 0x6fffffff;
pub const PT_HIOS = 0x6fffffff;
pub const PT_LOPROC = 0x70000000;
pub const PT_HIPROC = 0x7fffffff;
pub const SHT_NULL = 0;
pub const SHT_PROGBITS = 1;
pub const SHT_SYMTAB = 2;
pub const SHT_STRTAB = 3;
pub const SHT_RELA = 4;
pub const SHT_HASH = 5;
pub const SHT_DYNAMIC = 6;
pub const SHT_NOTE = 7;
pub const SHT_NOBITS = 8;
pub const SHT_REL = 9;
pub const SHT_SHLIB = 10;
pub const SHT_DYNSYM = 11;
pub const SHT_INIT_ARRAY = 14;
pub const SHT_FINI_ARRAY = 15;
pub const SHT_PREINIT_ARRAY = 16;
pub const SHT_GROUP = 17;
pub const SHT_SYMTAB_SHNDX = 18;
pub const SHT_LOOS = 0x60000000;
pub const SHT_HIOS = 0x6fffffff;
pub const SHT_LOPROC = 0x70000000;
pub const SHT_HIPROC = 0x7fffffff;
pub const SHT_LOUSER = 0x80000000;
pub const SHT_HIUSER = 0xffffffff;
pub const STB_LOCAL = 0;
pub const STB_GLOBAL = 1;
pub const STB_WEAK = 2;
pub const STB_NUM = 3;
pub const STB_LOOS = 10;
pub const STB_GNU_UNIQUE = 10;
pub const STB_HIOS = 12;
pub const STB_LOPROC = 13;
pub const STB_HIPROC = 15;
pub const STB_MIPS_SPLIT_COMMON = 13;
pub const STT_NOTYPE = 0;
pub const STT_OBJECT = 1;
pub const STT_FUNC = 2;
pub const STT_SECTION = 3;
pub const STT_FILE = 4;
pub const STT_COMMON = 5;
pub const STT_TLS = 6;
pub const STT_NUM = 7;
pub const STT_LOOS = 10;
pub const STT_GNU_IFUNC = 10;
pub const STT_HIOS = 12;
pub const STT_LOPROC = 13;
pub const STT_HIPROC = 15;
pub const STT_SPARC_REGISTER = 13;
pub const STT_PARISC_MILLICODE = 13;
pub const STT_HP_OPAQUE = (STT_LOOS + 0x1);
pub const STT_HP_STUB = (STT_LOOS + 0x2);
pub const STT_ARM_TFUNC = STT_LOPROC;
pub const STT_ARM_16BIT = STT_HIPROC;
pub const VER_FLG_BASE = 0x1;
pub const VER_FLG_WEAK = 0x2;
pub const MAGIC = "\x7fELF";
pub const ET = enum(u16) {
    
    NONE = 0,
    
    REL = 1,
    
    EXEC = 2,
    
    DYN = 3,
    
    CORE = 4,
    
    pub const LOPROC = 0xff00;
    
    pub const HIPROC = 0xffff;
};
pub const Header = struct {
    endian: std.builtin.Endian,
    machine: EM,
    is_64: bool,
    entry: u64,
    phoff: u64,
    shoff: u64,
    phentsize: u16,
    phnum: u16,
    shentsize: u16,
    shnum: u16,
    shstrndx: u16,
    pub fn program_header_iterator(self: Header, parse_source: anytype) ProgramHeaderIterator(@TypeOf(parse_source)) {
        return ProgramHeaderIterator(@TypeOf(parse_source)){
            .elf_header = self,
            .parse_source = parse_source,
        };
    }
    pub fn section_header_iterator(self: Header, parse_source: anytype) SectionHeaderIterator(@TypeOf(parse_source)) {
        return SectionHeaderIterator(@TypeOf(parse_source)){
            .elf_header = self,
            .parse_source = parse_source,
        };
    }
    pub fn read(parse_source: anytype) !Header {
        var hdr_buf: [@sizeOf(Elf64_Ehdr)]u8 align(@alignOf(Elf64_Ehdr)) = undefined;
        try parse_source.seekableStream().seekTo(0);
        try parse_source.reader().readNoEof(&hdr_buf);
        return Header.parse(&hdr_buf);
    }
    pub fn parse(hdr_buf: *align(@alignOf(Elf64_Ehdr)) const [@sizeOf(Elf64_Ehdr)]u8) !Header {
        const hdr32 = @ptrCast(*const Elf32_Ehdr, hdr_buf);
        const hdr64 = @ptrCast(*const Elf64_Ehdr, hdr_buf);
        if (!mem.eql(u8, hdr32.e_ident[0..4], MAGIC)) return error.InvalidElfMagic;
        if (hdr32.e_ident[EI_VERSION] != 1) return error.InvalidElfVersion;
        const endian: std.builtin.Endian = switch (hdr32.e_ident[EI_DATA]) {
            ELFDATA2LSB => .Little,
            ELFDATA2MSB => .Big,
            else => return error.InvalidElfEndian,
        };
        const need_bswap = endian != native_endian;
        const is_64 = switch (hdr32.e_ident[EI_CLASS]) {
            ELFCLASS32 => false,
            ELFCLASS64 => true,
            else => return error.InvalidElfClass,
        };
        const machine = if (need_bswap) blk: {
            const value = @enumToInt(hdr32.e_machine);
            break :blk @intToEnum(EM, @byteSwap(value));
        } else hdr32.e_machine;
        return @as(Header, .{
            .endian = endian,
            .machine = machine,
            .is_64 = is_64,
            .entry = int(is_64, need_bswap, hdr32.e_entry, hdr64.e_entry),
            .phoff = int(is_64, need_bswap, hdr32.e_phoff, hdr64.e_phoff),
            .shoff = int(is_64, need_bswap, hdr32.e_shoff, hdr64.e_shoff),
            .phentsize = int(is_64, need_bswap, hdr32.e_phentsize, hdr64.e_phentsize),
            .phnum = int(is_64, need_bswap, hdr32.e_phnum, hdr64.e_phnum),
            .shentsize = int(is_64, need_bswap, hdr32.e_shentsize, hdr64.e_shentsize),
            .shnum = int(is_64, need_bswap, hdr32.e_shnum, hdr64.e_shnum),
            .shstrndx = int(is_64, need_bswap, hdr32.e_shstrndx, hdr64.e_shstrndx),
        });
    }
};
pub fn ProgramHeaderIterator(comptime ParseSource: anytype) type {
    return struct {
        elf_header: Header,
        parse_source: ParseSource,
        index: usize = 0,
        pub fn next(self: *@This()) !?Elf64_Phdr {
            if (self.index >= self.elf_header.phnum) return null;
            defer self.index += 1;
            if (self.elf_header.is_64) {
                var phdr: Elf64_Phdr = undefined;
                const offset = self.elf_header.phoff + @sizeOf(@TypeOf(phdr)) * self.index;
                try self.parse_source.seekableStream().seekTo(offset);
                try self.parse_source.reader().readNoEof(mem.asBytes(&phdr));
                
                if (self.elf_header.endian == native_endian) return phdr;
                
                mem.byteSwapAllFields(Elf64_Phdr, &phdr);
                return phdr;
            }
            var phdr: Elf32_Phdr = undefined;
            const offset = self.elf_header.phoff + @sizeOf(@TypeOf(phdr)) * self.index;
            try self.parse_source.seekableStream().seekTo(offset);
            try self.parse_source.reader().readNoEof(mem.asBytes(&phdr));
            
            if (self.elf_header.endian != native_endian) {
                
                mem.byteSwapAllFields(Elf32_Phdr, &phdr);
            }
            
            return Elf64_Phdr{
                .p_type = phdr.p_type,
                .p_offset = phdr.p_offset,
                .p_vaddr = phdr.p_vaddr,
                .p_paddr = phdr.p_paddr,
                .p_filesz = phdr.p_filesz,
                .p_memsz = phdr.p_memsz,
                .p_flags = phdr.p_flags,
                .p_align = phdr.p_align,
            };
        }
    };
}
pub fn SectionHeaderIterator(comptime ParseSource: anytype) type {
    return struct {
        elf_header: Header,
        parse_source: ParseSource,
        index: usize = 0,
        pub fn next(self: *@This()) !?Elf64_Shdr {
            if (self.index >= self.elf_header.shnum) return null;
            defer self.index += 1;
            if (self.elf_header.is_64) {
                var shdr: Elf64_Shdr = undefined;
                const offset = self.elf_header.shoff + @sizeOf(@TypeOf(shdr)) * self.index;
                try self.parse_source.seekableStream().seekTo(offset);
                try self.parse_source.reader().readNoEof(mem.asBytes(&shdr));
                
                if (self.elf_header.endian == native_endian) return shdr;
                
                mem.byteSwapAllFields(Elf64_Shdr, &shdr);
                return shdr;
            }
            var shdr: Elf32_Shdr = undefined;
            const offset = self.elf_header.shoff + @sizeOf(@TypeOf(shdr)) * self.index;
            try self.parse_source.seekableStream().seekTo(offset);
            try self.parse_source.reader().readNoEof(mem.asBytes(&shdr));
            
            if (self.elf_header.endian != native_endian) {
                
                mem.byteSwapAllFields(Elf32_Shdr, &shdr);
            }
            
            return Elf64_Shdr{
                .sh_name = shdr.sh_name,
                .sh_type = shdr.sh_type,
                .sh_flags = shdr.sh_flags,
                .sh_addr = shdr.sh_addr,
                .sh_offset = shdr.sh_offset,
                .sh_size = shdr.sh_size,
                .sh_link = shdr.sh_link,
                .sh_info = shdr.sh_info,
                .sh_addralign = shdr.sh_addralign,
                .sh_entsize = shdr.sh_entsize,
            };
        }
    };
}
pub fn int(is_64: bool, need_bswap: bool, int_32: anytype, int_64: anytype) @TypeOf(int_64) {
    if (is_64) {
        if (need_bswap) {
            return @byteSwap(int_64);
        } else {
            return int_64;
        }
    } else {
        return int32(need_bswap, int_32, @TypeOf(int_64));
    }
}
pub fn int32(need_bswap: bool, int_32: anytype, comptime Int64: anytype) Int64 {
    if (need_bswap) {
        return @byteSwap(int_32);
    } else {
        return int_32;
    }
}
pub const EI_NIDENT = 16;
pub const EI_CLASS = 4;
pub const ELFCLASSNONE = 0;
pub const ELFCLASS32 = 1;
pub const ELFCLASS64 = 2;
pub const ELFCLASSNUM = 3;
pub const EI_DATA = 5;
pub const ELFDATANONE = 0;
pub const ELFDATA2LSB = 1;
pub const ELFDATA2MSB = 2;
pub const ELFDATANUM = 3;
pub const EI_VERSION = 6;
pub const Elf32_Half = u16;
pub const Elf64_Half = u16;
pub const Elf32_Word = u32;
pub const Elf32_Sword = i32;
pub const Elf64_Word = u32;
pub const Elf64_Sword = i32;
pub const Elf32_Xword = u64;
pub const Elf32_Sxword = i64;
pub const Elf64_Xword = u64;
pub const Elf64_Sxword = i64;
pub const Elf32_Addr = u32;
pub const Elf64_Addr = u64;
pub const Elf32_Off = u32;
pub const Elf64_Off = u64;
pub const Elf32_Section = u16;
pub const Elf64_Section = u16;
pub const Elf32_Versym = Elf32_Half;
pub const Elf64_Versym = Elf64_Half;
pub const Elf32_Ehdr = extern struct {
    e_ident: [EI_NIDENT]u8,
    e_type: ET,
    e_machine: EM,
    e_version: Elf32_Word,
    e_entry: Elf32_Addr,
    e_phoff: Elf32_Off,
    e_shoff: Elf32_Off,
    e_flags: Elf32_Word,
    e_ehsize: Elf32_Half,
    e_phentsize: Elf32_Half,
    e_phnum: Elf32_Half,
    e_shentsize: Elf32_Half,
    e_shnum: Elf32_Half,
    e_shstrndx: Elf32_Half,
};
pub const Elf64_Ehdr = extern struct {
    e_ident: [EI_NIDENT]u8,
    e_type: ET,
    e_machine: EM,
    e_version: Elf64_Word,
    e_entry: Elf64_Addr,
    e_phoff: Elf64_Off,
    e_shoff: Elf64_Off,
    e_flags: Elf64_Word,
    e_ehsize: Elf64_Half,
    e_phentsize: Elf64_Half,
    e_phnum: Elf64_Half,
    e_shentsize: Elf64_Half,
    e_shnum: Elf64_Half,
    e_shstrndx: Elf64_Half,
};
pub const Elf32_Phdr = extern struct {
    p_type: Elf32_Word,
    p_offset: Elf32_Off,
    p_vaddr: Elf32_Addr,
    p_paddr: Elf32_Addr,
    p_filesz: Elf32_Word,
    p_memsz: Elf32_Word,
    p_flags: Elf32_Word,
    p_align: Elf32_Word,
};
pub const Elf64_Phdr = extern struct {
    p_type: Elf64_Word,
    p_flags: Elf64_Word,
    p_offset: Elf64_Off,
    p_vaddr: Elf64_Addr,
    p_paddr: Elf64_Addr,
    p_filesz: Elf64_Xword,
    p_memsz: Elf64_Xword,
    p_align: Elf64_Xword,
};
pub const Elf32_Shdr = extern struct {
    sh_name: Elf32_Word,
    sh_type: Elf32_Word,
    sh_flags: Elf32_Word,
    sh_addr: Elf32_Addr,
    sh_offset: Elf32_Off,
    sh_size: Elf32_Word,
    sh_link: Elf32_Word,
    sh_info: Elf32_Word,
    sh_addralign: Elf32_Word,
    sh_entsize: Elf32_Word,
};
pub const Elf64_Shdr = extern struct {
    sh_name: Elf64_Word,
    sh_type: Elf64_Word,
    sh_flags: Elf64_Xword,
    sh_addr: Elf64_Addr,
    sh_offset: Elf64_Off,
    sh_size: Elf64_Xword,
    sh_link: Elf64_Word,
    sh_info: Elf64_Word,
    sh_addralign: Elf64_Xword,
    sh_entsize: Elf64_Xword,
};
pub const Elf32_Chdr = extern struct {
    ch_type: Elf32_Word,
    ch_size: Elf32_Word,
    ch_addralign: Elf32_Word,
};
pub const Elf64_Chdr = extern struct {
    ch_type: Elf64_Word,
    ch_reserved: Elf64_Word,
    ch_size: Elf64_Xword,
    ch_addralign: Elf64_Xword,
};
pub const Elf32_Sym = extern struct {
    st_name: Elf32_Word,
    st_value: Elf32_Addr,
    st_size: Elf32_Word,
    st_info: u8,
    st_other: u8,
    st_shndx: Elf32_Section,
};
pub const Elf64_Sym = extern struct {
    st_name: Elf64_Word,
    st_info: u8,
    st_other: u8,
    st_shndx: Elf64_Section,
    st_value: Elf64_Addr,
    st_size: Elf64_Xword,
};
pub const Elf32_Syminfo = extern struct {
    si_boundto: Elf32_Half,
    si_flags: Elf32_Half,
};
pub const Elf64_Syminfo = extern struct {
    si_boundto: Elf64_Half,
    si_flags: Elf64_Half,
};
pub const Elf32_Rel = extern struct {
    r_offset: Elf32_Addr,
    r_info: Elf32_Word,
    pub inline fn r_sym(self: @This()) u24 {
        return @truncate(u24, self.r_info >> 8);
    }
    pub inline fn r_type(self: @This()) u8 {
        return @truncate(u8, self.r_info & 0xff);
    }
};
pub const Elf64_Rel = extern struct {
    r_offset: Elf64_Addr,
    r_info: Elf64_Xword,
    pub inline fn r_sym(self: @This()) u32 {
        return @truncate(u32, self.r_info >> 32);
    }
    pub inline fn r_type(self: @This()) u32 {
        return @truncate(u32, self.r_info & 0xffffffff);
    }
};
pub const Elf32_Rela = extern struct {
    r_offset: Elf32_Addr,
    r_info: Elf32_Word,
    r_addend: Elf32_Sword,
    pub inline fn r_sym(self: @This()) u24 {
        return @truncate(u24, self.r_info >> 8);
    }
    pub inline fn r_type(self: @This()) u8 {
        return @truncate(u8, self.r_info & 0xff);
    }
};
pub const Elf64_Rela = extern struct {
    r_offset: Elf64_Addr,
    r_info: Elf64_Xword,
    r_addend: Elf64_Sxword,
    pub inline fn r_sym(self: @This()) u32 {
        return @truncate(u32, self.r_info >> 32);
    }
    pub inline fn r_type(self: @This()) u32 {
        return @truncate(u32, self.r_info & 0xffffffff);
    }
};
pub const Elf32_Dyn = extern struct {
    d_tag: Elf32_Sword,
    d_val: Elf32_Addr,
};
pub const Elf64_Dyn = extern struct {
    d_tag: Elf64_Sxword,
    d_val: Elf64_Addr,
};
pub const Elf32_Verdef = extern struct {
    vd_version: Elf32_Half,
    vd_flags: Elf32_Half,
    vd_ndx: Elf32_Half,
    vd_cnt: Elf32_Half,
    vd_hash: Elf32_Word,
    vd_aux: Elf32_Word,
    vd_next: Elf32_Word,
};
pub const Elf64_Verdef = extern struct {
    vd_version: Elf64_Half,
    vd_flags: Elf64_Half,
    vd_ndx: Elf64_Half,
    vd_cnt: Elf64_Half,
    vd_hash: Elf64_Word,
    vd_aux: Elf64_Word,
    vd_next: Elf64_Word,
};
pub const Elf32_Verdaux = extern struct {
    vda_name: Elf32_Word,
    vda_next: Elf32_Word,
};
pub const Elf64_Verdaux = extern struct {
    vda_name: Elf64_Word,
    vda_next: Elf64_Word,
};
pub const Elf32_Verneed = extern struct {
    vn_version: Elf32_Half,
    vn_cnt: Elf32_Half,
    vn_file: Elf32_Word,
    vn_aux: Elf32_Word,
    vn_next: Elf32_Word,
};
pub const Elf64_Verneed = extern struct {
    vn_version: Elf64_Half,
    vn_cnt: Elf64_Half,
    vn_file: Elf64_Word,
    vn_aux: Elf64_Word,
    vn_next: Elf64_Word,
};
pub const Elf32_Vernaux = extern struct {
    vna_hash: Elf32_Word,
    vna_flags: Elf32_Half,
    vna_other: Elf32_Half,
    vna_name: Elf32_Word,
    vna_next: Elf32_Word,
};
pub const Elf64_Vernaux = extern struct {
    vna_hash: Elf64_Word,
    vna_flags: Elf64_Half,
    vna_other: Elf64_Half,
    vna_name: Elf64_Word,
    vna_next: Elf64_Word,
};
pub const Elf32_auxv_t = extern struct {
    a_type: u32,
    a_un: extern union {
        a_val: u32,
    },
};
pub const Elf64_auxv_t = extern struct {
    a_type: u64,
    a_un: extern union {
        a_val: u64,
    },
};
pub const Elf32_Nhdr = extern struct {
    n_namesz: Elf32_Word,
    n_descsz: Elf32_Word,
    n_type: Elf32_Word,
};
pub const Elf64_Nhdr = extern struct {
    n_namesz: Elf64_Word,
    n_descsz: Elf64_Word,
    n_type: Elf64_Word,
};
pub const Elf32_Move = extern struct {
    m_value: Elf32_Xword,
    m_info: Elf32_Word,
    m_poffset: Elf32_Word,
    m_repeat: Elf32_Half,
    m_stride: Elf32_Half,
};
pub const Elf64_Move = extern struct {
    m_value: Elf64_Xword,
    m_info: Elf64_Xword,
    m_poffset: Elf64_Xword,
    m_repeat: Elf64_Half,
    m_stride: Elf64_Half,
};
pub const Elf32_gptab = extern union {
    gt_header: extern struct {
        gt_current_g_value: Elf32_Word,
        gt_unused: Elf32_Word,
    },
    gt_entry: extern struct {
        gt_g_value: Elf32_Word,
        gt_bytes: Elf32_Word,
    },
};
pub const Elf32_RegInfo = extern struct {
    ri_gprmask: Elf32_Word,
    ri_cprmask: [4]Elf32_Word,
    ri_gp_value: Elf32_Sword,
};
pub const Elf_Options = extern struct {
    kind: u8,
    size: u8,
    @"section": Elf32_Section,
    info: Elf32_Word,
};
pub const Elf_Options_Hw = extern struct {
    hwp_flags1: Elf32_Word,
    hwp_flags2: Elf32_Word,
};
pub const Elf32_Lib = extern struct {
    l_name: Elf32_Word,
    l_time_stamp: Elf32_Word,
    l_checksum: Elf32_Word,
    l_version: Elf32_Word,
    l_flags: Elf32_Word,
};
pub const Elf64_Lib = extern struct {
    l_name: Elf64_Word,
    l_time_stamp: Elf64_Word,
    l_checksum: Elf64_Word,
    l_version: Elf64_Word,
    l_flags: Elf64_Word,
};
pub const Elf32_Conflict = Elf32_Addr;
pub const Elf_MIPS_ABIFlags_v0 = extern struct {
    version: Elf32_Half,
    isa_level: u8,
    isa_rev: u8,
    gpr_size: u8,
    cpr1_size: u8,
    cpr2_size: u8,
    fp_abi: u8,
    isa_ext: Elf32_Word,
    ases: Elf32_Word,
    flags1: Elf32_Word,
    flags2: Elf32_Word,
};
comptime {
    assert(@sizeOf(Elf32_Ehdr) == 52);
    assert(@sizeOf(Elf64_Ehdr) == 64);
    assert(@sizeOf(Elf32_Phdr) == 32);
    assert(@sizeOf(Elf64_Phdr) == 56);
    assert(@sizeOf(Elf32_Shdr) == 40);
    assert(@sizeOf(Elf64_Shdr) == 64);
}
pub const Auxv = switch (@sizeOf(usize)) {
    4 => Elf32_auxv_t,
    8 => Elf64_auxv_t,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Ehdr = switch (@sizeOf(usize)) {
    4 => Elf32_Ehdr,
    8 => Elf64_Ehdr,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Phdr = switch (@sizeOf(usize)) {
    4 => Elf32_Phdr,
    8 => Elf64_Phdr,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Dyn = switch (@sizeOf(usize)) {
    4 => Elf32_Dyn,
    8 => Elf64_Dyn,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Rel = switch (@sizeOf(usize)) {
    4 => Elf32_Rel,
    8 => Elf64_Rel,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Rela = switch (@sizeOf(usize)) {
    4 => Elf32_Rela,
    8 => Elf64_Rela,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Shdr = switch (@sizeOf(usize)) {
    4 => Elf32_Shdr,
    8 => Elf64_Shdr,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Sym = switch (@sizeOf(usize)) {
    4 => Elf32_Sym,
    8 => Elf64_Sym,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Verdef = switch (@sizeOf(usize)) {
    4 => Elf32_Verdef,
    8 => Elf64_Verdef,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Verdaux = switch (@sizeOf(usize)) {
    4 => Elf32_Verdaux,
    8 => Elf64_Verdaux,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Addr = switch (@sizeOf(usize)) {
    4 => Elf32_Addr,
    8 => Elf64_Addr,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const Half = switch (@sizeOf(usize)) {
    4 => Elf32_Half,
    8 => Elf64_Half,
    else => @compileError("expected pointer size of 32 or 64"),
};
pub const EM = enum(u16) {
    
    NONE = 0,
    
    M32 = 1,
    
    SPARC = 2,
    
    @"386" = 3,
    
    @"68K" = 4,
    
    @"88K" = 5,
    
    IAMCU = 6,
    
    @"860" = 7,
    
    MIPS = 8,
    
    S370 = 9,
    
    MIPS_RS3_LE = 10,
    
    SPU_2 = 13,
    
    PARISC = 15,
    
    VPP500 = 17,
    
    SPARC32PLUS = 18,
    
    @"960" = 19,
    
    PPC = 20,
    
    PPC64 = 21,
    
    S390 = 22,
    
    SPU = 23,
    
    V800 = 36,
    
    FR20 = 37,
    
    RH32 = 38,
    
    RCE = 39,
    
    ARM = 40,
    
    ALPHA = 41,
    
    SH = 42,
    
    SPARCV9 = 43,
    
    TRICORE = 44,
    
    ARC = 45,
    
    H8_300 = 46,
    
    H8_300H = 47,
    
    H8S = 48,
    
    H8_500 = 49,
    
    IA_64 = 50,
    
    MIPS_X = 51,
    
    COLDFIRE = 52,
    
    @"68HC12" = 53,
    
    MMA = 54,
    
    PCP = 55,
    
    NCPU = 56,
    
    NDR1 = 57,
    
    STARCORE = 58,
    
    ME16 = 59,
    
    ST100 = 60,
    
    TINYJ = 61,
    
    X86_64 = 62,
    
    PDSP = 63,
    
    PDP10 = 64,
    
    PDP11 = 65,
    
    FX66 = 66,
    
    ST9PLUS = 67,
    
    ST7 = 68,
    
    @"68HC16" = 69,
    
    @"68HC11" = 70,
    
    @"68HC08" = 71,
    
    @"68HC05" = 72,
    
    SVX = 73,
    
    ST19 = 74,
    
    VAX = 75,
    
    CRIS = 76,
    
    JAVELIN = 77,
    
    FIREPATH = 78,
    
    ZSP = 79,
    
    MMIX = 80,
    
    HUANY = 81,
    
    PRISM = 82,
    
    AVR = 83,
    
    FR30 = 84,
    
    D10V = 85,
    
    D30V = 86,
    
    V850 = 87,
    
    M32R = 88,
    
    MN10300 = 89,
    
    MN10200 = 90,
    
    PJ = 91,
    
    OPENRISC = 92,
    
    ARC_COMPACT = 93,
    
    XTENSA = 94,
    
    VIDEOCORE = 95,
    
    TMM_GPP = 96,
    
    NS32K = 97,
    
    TPC = 98,
    
    SNP1K = 99,
    
    ST200 = 100,
    
    IP2K = 101,
    
    MAX = 102,
    
    CR = 103,
    
    F2MC16 = 104,
    
    MSP430 = 105,
    
    BLACKFIN = 106,
    
    SE_C33 = 107,
    
    SEP = 108,
    
    ARCA = 109,
    
    UNICORE = 110,
    
    EXCESS = 111,
    
    DXP = 112,
    
    ALTERA_NIOS2 = 113,
    
    CRX = 114,
    
    XGATE = 115,
    
    C166 = 116,
    
    M16C = 117,
    
    DSPIC30F = 118,
    
    CE = 119,
    
    M32C = 120,
    
    TSK3000 = 131,
    
    RS08 = 132,
    
    SHARC = 133,
    
    ECOG2 = 134,
    
    SCORE7 = 135,
    
    DSP24 = 136,
    
    VIDEOCORE3 = 137,
    
    LATTICEMICO32 = 138,
    
    SE_C17 = 139,
    
    TI_C6000 = 140,
    
    TI_C2000 = 141,
    
    TI_C5500 = 142,
    
    MMDSP_PLUS = 160,
    
    CYPRESS_M8C = 161,
    
    R32C = 162,
    
    TRIMEDIA = 163,
    
    HEXAGON = 164,
    
    @"8051" = 165,
    
    STXP7X = 166,
    
    NDS32 = 167,
    
    ECOG1X = 168,
    
    MAXQ30 = 169,
    
    XIMO16 = 170,
    
    MANIK = 171,
    
    CRAYNV2 = 172,
    
    RX = 173,
    
    METAG = 174,
    
    MCST_ELBRUS = 175,
    
    ECOG16 = 176,
    
    CR16 = 177,
    
    ETPU = 178,
    
    SLE9X = 179,
    
    L10M = 180,
    
    K10M = 181,
    
    AARCH64 = 183,
    
    AVR32 = 185,
    
    STM8 = 186,
    
    TILE64 = 187,
    
    TILEPRO = 188,
    
    CUDA = 190,
    
    TILEGX = 191,
    
    CLOUDSHIELD = 192,
    
    COREA_1ST = 193,
    
    COREA_2ND = 194,
    
    ARC_COMPACT2 = 195,
    
    OPEN8 = 196,
    
    RL78 = 197,
    
    VIDEOCORE5 = 198,
    
    @"78KOR" = 199,
    
    @"56800EX" = 200,
    
    BA1 = 201,
    
    BA2 = 202,
    
    XCORE = 203,
    
    MCHP_PIC = 204,
    
    INTEL205 = 205,
    
    INTEL206 = 206,
    
    INTEL207 = 207,
    
    INTEL208 = 208,
    
    INTEL209 = 209,
    
    KM32 = 210,
    
    KMX32 = 211,
    
    KMX16 = 212,
    
    KMX8 = 213,
    
    KVARC = 214,
    
    CDP = 215,
    
    COGE = 216,
    
    COOL = 217,
    
    NORC = 218,
    
    CSR_KALIMBA = 219,
    
    AMDGPU = 224,
    
    RISCV = 243,
    
    LANAI = 244,
    
    BPF = 247,
    
    CSKY = 252,
    
    FRV = 0x5441,
    _,
    pub fn toTargetCpuArch(em: EM) ?std.Target.Cpu.Arch {
        return switch (em) {
            .AVR => .avr,
            .MSP430 => .msp430,
            .ARC => .arc,
            .ARM => .arm,
            .HEXAGON => .hexagon,
            .@"68K" => .m68k,
            .MIPS => .mips,
            .MIPS_RS3_LE => .mipsel,
            .PPC => .powerpc,
            .SPARC => .sparc,
            .@"386" => .i386,
            .XCORE => .xcore,
            .CSR_KALIMBA => .kalimba,
            .LANAI => .lanai,
            .AARCH64 => .aarch64,
            .PPC64 => .powerpc64,
            .RISCV => .riscv64,
            .X86_64 => .x86_64,
            .BPF => .bpfel,
            .SPARCV9 => .sparc64,
            .S390 => .s390x,
            .SPU_2 => .spu_2,
            
            
            else => null,
        };
    }
};
pub const SHF_WRITE = 0x1;
pub const SHF_ALLOC = 0x2;
pub const SHF_EXECINSTR = 0x4;
pub const SHF_MERGE = 0x10;
pub const SHF_STRINGS = 0x20;
pub const SHF_INFO_LINK = 0x40;
pub const SHF_LINK_ORDER = 0x80;
pub const SHF_OS_NONCONFORMING = 0x100;
pub const SHF_GROUP = 0x200;
pub const SHF_TLS = 0x400;
pub const SHF_COMPRESSED = 0x800;
pub const SHF_EXCLUDE = 0x80000000;
pub const SHF_MASKOS = 0x0ff00000;
pub const SHF_MASKPROC = 0xf0000000;
pub const XCORE_SHF_DP_SECTION = 0x10000000;
pub const XCORE_SHF_CP_SECTION = 0x20000000;
pub const SHF_X86_64_LARGE = 0x10000000;
pub const SHF_HEX_GPREL = 0x10000000;
pub const SHF_MIPS_NODUPES = 0x01000000;
pub const SHF_MIPS_NAMES = 0x02000000;
pub const SHF_MIPS_LOCAL = 0x04000000;
pub const SHF_MIPS_NOSTRIP = 0x08000000;
pub const SHF_MIPS_GPREL = 0x10000000;
pub const SHF_MIPS_MERGE = 0x20000000;
pub const SHF_MIPS_ADDR = 0x40000000;
pub const SHF_MIPS_STRING = 0x80000000;
pub const SHF_ARM_PURECODE = 0x2000000;
pub const PF_X = 1;
pub const PF_W = 2;
pub const PF_R = 4;
pub const PF_MASKOS = 0x0ff00000;
pub const PF_MASKPROC = 0xf0000000;
pub const SHN_UNDEF = 0;
pub const SHN_LORESERVE = 0xff00;
pub const SHN_LOPROC = 0xff00;
pub const SHN_HIPROC = 0xff1f;
pub const SHN_LIVEPATCH = 0xff20;
pub const SHN_ABS = 0xfff1;
pub const SHN_COMMON = 0xfff2;
pub const SHN_HIRESERVE = 0xffff;
pub const R_X86_64_NONE = 0;
pub const R_X86_64_64 = 1;
pub const R_X86_64_PC32 = 2;
pub const R_X86_64_GOT32 = 3;
pub const R_X86_64_PLT32 = 4;
pub const R_X86_64_COPY = 5;
pub const R_X86_64_GLOB_DAT = 6;
pub const R_X86_64_JUMP_SLOT = 7;
pub const R_X86_64_RELATIVE = 8;
pub const R_X86_64_GOTPCREL = 9;
pub const R_X86_64_32 = 10;
pub const R_X86_64_32S = 11;
pub const R_X86_64_16 = 12;
pub const R_X86_64_PC16 = 13;
pub const R_X86_64_8 = 14;
pub const R_X86_64_PC8 = 15;
pub const R_X86_64_DTPMOD64 = 16;
pub const R_X86_64_DTPOFF64 = 17;
pub const R_X86_64_TPOFF64 = 18;
pub const R_X86_64_TLSGD = 19;
pub const R_X86_64_TLSLD = 20;
pub const R_X86_64_DTPOFF32 = 21;
pub const R_X86_64_GOTTPOFF = 22;
pub const R_X86_64_TPOFF32 = 23;
pub const R_X86_64_PC64 = 24;
pub const R_X86_64_GOTOFF64 = 25;
pub const R_X86_64_GOTPC32 = 26;
pub const R_X86_64_GOT64 = 27;
pub const R_X86_64_GOTPCREL64 = 28;
pub const R_X86_64_GOTPC64 = 29;
pub const R_X86_64_GOTPLT64 = 30;
pub const R_X86_64_PLTOFF64 = 31;
pub const R_X86_64_SIZE32 = 32;
pub const R_X86_64_SIZE64 = 33;
pub const R_X86_64_GOTPC32_TLSDESC = 34;
pub const R_X86_64_TLSDESC_CALL = 35;
pub const R_X86_64_TLSDESC = 36;
pub const R_X86_64_IRELATIVE = 37;
pub const R_X86_64_RELATIVE64 = 38;
pub const R_X86_64_GOTPCRELX = 41;
pub const R_X86_64_REX_GOTPCRELX = 42;
pub const R_X86_64_NUM = 43;
pub const STV = enum(u2) {
    DEFAULT = 0,
    INTERNAL = 1,
    HIDDEN = 2,
    PROTECTED = 3,
};