zig

blob c8faaa33 (213302B) - Raw

---

 base: link.File,
 rpath_table: std.StringArrayHashMapUnmanaged(void),
 image_base: u64,
 emit_relocs: bool,
 z_nodelete: bool,
 z_notext: bool,
 z_defs: bool,
 z_origin: bool,
 z_nocopyreloc: bool,
 z_now: bool,
 z_relro: bool,
 /// TODO make this non optional and resolve the default in open()
 z_common_page_size: ?u64,
 /// TODO make this non optional and resolve the default in open()
 z_max_page_size: ?u64,
 lib_dirs: []const []const u8,
 hash_style: HashStyle,
 compress_debug_sections: CompressDebugSections,
 symbol_wrap_set: std.StringArrayHashMapUnmanaged(void),
 sort_section: ?SortSection,
 soname: ?[]const u8,
 bind_global_refs_locally: bool,
 linker_script: ?[]const u8,
 version_script: ?[]const u8,
 allow_undefined_version: bool,
 enable_new_dtags: ?bool,
 print_icf_sections: bool,
 print_map: bool,
 entry_name: ?[]const u8,
 
 ptr_width: PtrWidth,
 
 /// If this is not null, an object file is created by LLVM and emitted to zcu_object_sub_path.
 llvm_object: ?LlvmObject.Ptr = null,
 
 /// A list of all input files.
 /// Index of each input file also encodes the priority or precedence of one input file
 /// over another.
 files: std.MultiArrayList(File.Entry) = .{},
 /// Long-lived list of all file descriptors.
 /// We store them globally rather than per actual File so that we can re-use
 /// one file handle per every object file within an archive.
 file_handles: std.ArrayListUnmanaged(File.Handle) = .empty,
 zig_object_index: ?File.Index = null,
 linker_defined_index: ?File.Index = null,
 objects: std.ArrayListUnmanaged(File.Index) = .empty,
 shared_objects: std.ArrayListUnmanaged(File.Index) = .empty,
 
 /// List of all output sections and their associated metadata.
 sections: std.MultiArrayList(Section) = .{},
 /// File offset into the shdr table.
 shdr_table_offset: ?u64 = null,
 
 /// Stored in native-endian format, depending on target endianness needs to be bswapped on read/write.
 /// Same order as in the file.
 phdrs: std.ArrayListUnmanaged(elf.Elf64_Phdr) = .empty,
 
 /// Special program headers
 /// PT_PHDR
 phdr_table_index: ?u16 = null,
 /// PT_LOAD for PHDR table
 /// We add this special load segment to ensure the EHDR and PHDR table are always
 /// loaded into memory.
 phdr_table_load_index: ?u16 = null,
 /// PT_INTERP
 phdr_interp_index: ?u16 = null,
 /// PT_DYNAMIC
 phdr_dynamic_index: ?u16 = null,
 /// PT_GNU_EH_FRAME
 phdr_gnu_eh_frame_index: ?u16 = null,
 /// PT_GNU_STACK
 phdr_gnu_stack_index: ?u16 = null,
 /// PT_TLS
 /// TODO I think ELF permits multiple TLS segments but for now, assume one per file.
 phdr_tls_index: ?u16 = null,
 
 page_size: u32,
 default_sym_version: elf.Elf64_Versym,
 
 /// .shstrtab buffer
 shstrtab: std.ArrayListUnmanaged(u8) = .empty,
 /// .symtab buffer
 symtab: std.ArrayListUnmanaged(elf.Elf64_Sym) = .empty,
 /// .strtab buffer
 strtab: std.ArrayListUnmanaged(u8) = .empty,
 /// Dynamic symbol table. Only populated and emitted when linking dynamically.
 dynsym: DynsymSection = .{},
 /// .dynstrtab buffer
 dynstrtab: std.ArrayListUnmanaged(u8) = .empty,
 /// Version symbol table. Only populated and emitted when linking dynamically.
 versym: std.ArrayListUnmanaged(elf.Elf64_Versym) = .empty,
 /// .verneed section
 verneed: VerneedSection = .{},
 /// .got section
 got: GotSection = .{},
 /// .rela.dyn section
 rela_dyn: std.ArrayListUnmanaged(elf.Elf64_Rela) = .empty,
 /// .dynamic section
 dynamic: DynamicSection = .{},
 /// .hash section
 hash: HashSection = .{},
 /// .gnu.hash section
 gnu_hash: GnuHashSection = .{},
 /// .plt section
 plt: PltSection = .{},
 /// .got.plt section
 got_plt: GotPltSection = .{},
 /// .plt.got section
 plt_got: PltGotSection = .{},
 /// .copyrel section
 copy_rel: CopyRelSection = .{},
 /// .rela.plt section
 rela_plt: std.ArrayListUnmanaged(elf.Elf64_Rela) = .empty,
 /// SHT_GROUP sections
 /// Applies only to a relocatable.
 comdat_group_sections: std.ArrayListUnmanaged(ComdatGroupSection) = .empty,
 
 copy_rel_section_index: ?u32 = null,
 dynamic_section_index: ?u32 = null,
 dynstrtab_section_index: ?u32 = null,
 dynsymtab_section_index: ?u32 = null,
 eh_frame_section_index: ?u32 = null,
 eh_frame_rela_section_index: ?u32 = null,
 eh_frame_hdr_section_index: ?u32 = null,
 hash_section_index: ?u32 = null,
 gnu_hash_section_index: ?u32 = null,
 got_section_index: ?u32 = null,
 got_plt_section_index: ?u32 = null,
 interp_section_index: ?u32 = null,
 plt_section_index: ?u32 = null,
 plt_got_section_index: ?u32 = null,
 rela_dyn_section_index: ?u32 = null,
 rela_plt_section_index: ?u32 = null,
 versym_section_index: ?u32 = null,
 verneed_section_index: ?u32 = null,
 
 shstrtab_section_index: ?u32 = null,
 strtab_section_index: ?u32 = null,
 symtab_section_index: ?u32 = null,
 
 resolver: SymbolResolver = .{},
 
 has_text_reloc: bool = false,
 num_ifunc_dynrelocs: usize = 0,
 
 /// List of range extension thunks.
 thunks: std.ArrayListUnmanaged(Thunk) = .empty,
 
 /// List of output merge sections with deduped contents.
 merge_sections: std.ArrayListUnmanaged(MergeSection) = .empty,
 comment_merge_section_index: ?MergeSection.Index = null,
 
 first_eflags: ?elf.Elf64_Word = null,
 
 /// When allocating, the ideal_capacity is calculated by
 /// actual_capacity + (actual_capacity / ideal_factor)
 const ideal_factor = 3;
 
 /// In order for a slice of bytes to be considered eligible to keep metadata pointing at
 /// it as a possible place to put new symbols, it must have enough room for this many bytes
 /// (plus extra for reserved capacity).
 const minimum_atom_size = 64;
 pub const min_text_capacity = padToIdeal(minimum_atom_size);
 
 pub const PtrWidth = enum { p32, p64 };
 pub const HashStyle = enum { sysv, gnu, both };
 pub const CompressDebugSections = enum { none, zlib, zstd };
 pub const SortSection = enum { name, alignment };
 
 pub fn createEmpty(
     arena: Allocator,
     comp: *Compilation,
     emit: Path,
     options: link.File.OpenOptions,
 ) !*Elf {
     const target = comp.root_mod.resolved_target.result;
     assert(target.ofmt == .elf);
 
     const use_lld = build_options.have_llvm and comp.config.use_lld;
     const use_llvm = comp.config.use_llvm;
     const opt_zcu = comp.zcu;
     const output_mode = comp.config.output_mode;
     const link_mode = comp.config.link_mode;
     const optimize_mode = comp.root_mod.optimize_mode;
     const is_native_os = comp.root_mod.resolved_target.is_native_os;
     const ptr_width: PtrWidth = switch (target.ptrBitWidth()) {
         0...32 => .p32,
         33...64 => .p64,
         else => return error.UnsupportedELFArchitecture,
     };
 
     // This is the max page size that the target system can run with, aka the ABI page size. Not to
     // be confused with the common page size, which is the page size that's used in practice on most
     // systems.
     const page_size: u32 = switch (target.cpu.arch) {
         .bpfel,
         .bpfeb,
         .sparc64,
         => 0x100000,
         .aarch64,
         .aarch64_be,
         .amdgcn,
         .hexagon,
         .mips,
         .mipsel,
         .mips64,
         .mips64el,
         .powerpc,
         .powerpcle,
         .powerpc64,
         .powerpc64le,
         .sparc,
         => 0x10000,
         .loongarch32,
         .loongarch64,
         => 0x4000,
         .arc,
         .m68k,
         => 0x2000,
         .msp430,
         => 0x4,
         .avr,
         => 0x1,
         else => 0x1000,
     };
 
     const is_dyn_lib = output_mode == .Lib and link_mode == .dynamic;
     const default_sym_version: elf.Elf64_Versym = if (is_dyn_lib or comp.config.rdynamic)
         elf.VER_NDX_GLOBAL
     else
         elf.VER_NDX_LOCAL;
 
     // If using LLD to link, this code should produce an object file so that it
     // can be passed to LLD.
     // If using LLVM to generate the object file for the zig compilation unit,
     // we need a place to put the object file so that it can be subsequently
     // handled.
     const zcu_object_sub_path = if (!use_lld and !use_llvm)
         null
     else
         try std.fmt.allocPrint(arena, "{s}.o", .{emit.sub_path});
 
     var rpath_table: std.StringArrayHashMapUnmanaged(void) = .empty;
     try rpath_table.entries.resize(arena, options.rpath_list.len);
     @memcpy(rpath_table.entries.items(.key), options.rpath_list);
     try rpath_table.reIndex(arena);
 
     const self = try arena.create(Elf);
     self.* = .{
         .base = .{
             .tag = .elf,
             .comp = comp,
             .emit = emit,
             .zcu_object_sub_path = zcu_object_sub_path,
             .gc_sections = options.gc_sections orelse (optimize_mode != .Debug and output_mode != .Obj),
             .print_gc_sections = options.print_gc_sections,
             .stack_size = options.stack_size orelse 16777216,
             .allow_shlib_undefined = options.allow_shlib_undefined orelse !is_native_os,
             .file = null,
             .disable_lld_caching = options.disable_lld_caching,
             .build_id = options.build_id,
         },
         .rpath_table = rpath_table,
         .ptr_width = ptr_width,
         .page_size = page_size,
         .default_sym_version = default_sym_version,
 
         .entry_name = switch (options.entry) {
             .disabled => null,
             .default => if (output_mode != .Exe) null else defaultEntrySymbolName(target.cpu.arch),
             .enabled => defaultEntrySymbolName(target.cpu.arch),
             .named => |name| name,
         },
 
         .image_base = b: {
             if (is_dyn_lib) break :b 0;
             if (output_mode == .Exe and comp.config.pie) break :b 0;
             break :b options.image_base orelse switch (ptr_width) {
                 .p32 => 0x10000,
                 .p64 => 0x1000000,
             };
         },
 
         .emit_relocs = options.emit_relocs,
         .z_nodelete = options.z_nodelete,
         .z_notext = options.z_notext,
         .z_defs = options.z_defs,
         .z_origin = options.z_origin,
         .z_nocopyreloc = options.z_nocopyreloc,
         .z_now = options.z_now,
         .z_relro = options.z_relro,
         .z_common_page_size = options.z_common_page_size,
         .z_max_page_size = options.z_max_page_size,
         .lib_dirs = options.lib_dirs,
         .hash_style = options.hash_style,
         .compress_debug_sections = options.compress_debug_sections,
         .symbol_wrap_set = options.symbol_wrap_set,
         .sort_section = options.sort_section,
         .soname = options.soname,
         .bind_global_refs_locally = options.bind_global_refs_locally,
         .linker_script = options.linker_script,
         .version_script = options.version_script,
         .allow_undefined_version = options.allow_undefined_version,
         .enable_new_dtags = options.enable_new_dtags,
         .print_icf_sections = options.print_icf_sections,
         .print_map = options.print_map,
     };
     if (use_llvm and comp.config.have_zcu) {
         self.llvm_object = try LlvmObject.create(arena, comp);
     }
     errdefer self.base.destroy();
 
     if (use_lld and (use_llvm or !comp.config.have_zcu)) {
         // LLVM emits the object file (if any); LLD links it into the final product.
         return self;
     }
 
     const is_obj = output_mode == .Obj;
     const is_obj_or_ar = is_obj or (output_mode == .Lib and link_mode == .static);
 
     // What path should this ELF linker code output to?
     // If using LLD to link, this code should produce an object file so that it
     // can be passed to LLD.
     const sub_path = if (use_lld) zcu_object_sub_path.? else emit.sub_path;
     self.base.file = try emit.root_dir.handle.createFile(sub_path, .{
         .truncate = true,
         .read = true,
         .mode = link.File.determineMode(use_lld, output_mode, link_mode),
     });
 
     const gpa = comp.gpa;
 
     // Append null file at index 0
     try self.files.append(gpa, .null);
     // Append null byte to string tables
     try self.shstrtab.append(gpa, 0);
     try self.strtab.append(gpa, 0);
     // There must always be a null shdr in index 0
     _ = try self.addSection(.{});
     // Append null symbol in output symtab
     try self.symtab.append(gpa, null_sym);
 
     if (!is_obj_or_ar) {
         try self.dynstrtab.append(gpa, 0);
 
         // Initialize PT_PHDR program header
         const p_align: u16 = switch (self.ptr_width) {
             .p32 => @alignOf(elf.Elf32_Phdr),
             .p64 => @alignOf(elf.Elf64_Phdr),
         };
         const ehsize: u64 = switch (self.ptr_width) {
             .p32 => @sizeOf(elf.Elf32_Ehdr),
             .p64 => @sizeOf(elf.Elf64_Ehdr),
         };
         const phsize: u64 = switch (self.ptr_width) {
             .p32 => @sizeOf(elf.Elf32_Phdr),
             .p64 => @sizeOf(elf.Elf64_Phdr),
         };
         const max_nphdrs = comptime getMaxNumberOfPhdrs();
         const reserved: u64 = mem.alignForward(u64, padToIdeal(max_nphdrs * phsize), self.page_size);
         self.phdr_table_index = try self.addPhdr(.{
             .type = elf.PT_PHDR,
             .flags = elf.PF_R,
             .@"align" = p_align,
             .addr = self.image_base + ehsize,
             .offset = ehsize,
             .filesz = reserved,
             .memsz = reserved,
         });
         self.phdr_table_load_index = try self.addPhdr(.{
             .type = elf.PT_LOAD,
             .flags = elf.PF_R,
             .@"align" = self.page_size,
             .addr = self.image_base,
             .offset = 0,
             .filesz = reserved + ehsize,
             .memsz = reserved + ehsize,
         });
     }
 
     if (opt_zcu) |zcu| {
         if (!use_llvm) {
             const index: File.Index = @intCast(try self.files.addOne(gpa));
             self.files.set(index, .{ .zig_object = .{
                 .index = index,
                 .path = try std.fmt.allocPrint(arena, "{s}.o", .{fs.path.stem(
                     zcu.main_mod.root_src_path,
                 )}),
             } });
             self.zig_object_index = index;
             try self.zigObjectPtr().?.init(self, .{
                 .symbol_count_hint = options.symbol_count_hint,
                 .program_code_size_hint = options.program_code_size_hint,
             });
         }
     }
 
     return self;
 }
 
 pub fn open(
     arena: Allocator,
     comp: *Compilation,
     emit: Path,
     options: link.File.OpenOptions,
 ) !*Elf {
     // TODO: restore saved linker state, don't truncate the file, and
     // participate in incremental compilation.
     return createEmpty(arena, comp, emit, options);
 }
 
 pub fn deinit(self: *Elf) void {
     const gpa = self.base.comp.gpa;
 
     if (self.llvm_object) |llvm_object| llvm_object.deinit();
 
     for (self.file_handles.items) |fh| {
         fh.close();
     }
     self.file_handles.deinit(gpa);
 
     for (self.files.items(.tags), self.files.items(.data)) |tag, *data| switch (tag) {
         .null => {},
         .zig_object => data.zig_object.deinit(gpa),
         .linker_defined => data.linker_defined.deinit(gpa),
         .object => data.object.deinit(gpa),
         .shared_object => data.shared_object.deinit(gpa),
     };
     self.files.deinit(gpa);
     self.objects.deinit(gpa);
     self.shared_objects.deinit(gpa);
 
     for (self.sections.items(.atom_list_2), self.sections.items(.atom_list), self.sections.items(.free_list)) |*atom_list, *atoms, *free_list| {
         atom_list.deinit(gpa);
         atoms.deinit(gpa);
         free_list.deinit(gpa);
     }
     self.sections.deinit(gpa);
     self.phdrs.deinit(gpa);
     self.shstrtab.deinit(gpa);
     self.symtab.deinit(gpa);
     self.strtab.deinit(gpa);
     self.resolver.deinit(gpa);
 
     for (self.thunks.items) |*th| {
         th.deinit(gpa);
     }
     self.thunks.deinit(gpa);
     for (self.merge_sections.items) |*sect| {
         sect.deinit(gpa);
     }
     self.merge_sections.deinit(gpa);
 
     self.got.deinit(gpa);
     self.plt.deinit(gpa);
     self.plt_got.deinit(gpa);
     self.dynsym.deinit(gpa);
     self.dynstrtab.deinit(gpa);
     self.dynamic.deinit(gpa);
     self.hash.deinit(gpa);
     self.versym.deinit(gpa);
     self.verneed.deinit(gpa);
     self.copy_rel.deinit(gpa);
     self.rela_dyn.deinit(gpa);
     self.rela_plt.deinit(gpa);
     self.comdat_group_sections.deinit(gpa);
 }
 
 pub fn getNavVAddr(self: *Elf, pt: Zcu.PerThread, nav_index: InternPool.Nav.Index, reloc_info: link.File.RelocInfo) !u64 {
     assert(self.llvm_object == null);
     return self.zigObjectPtr().?.getNavVAddr(self, pt, nav_index, reloc_info);
 }
 
 pub fn lowerUav(
     self: *Elf,
     pt: Zcu.PerThread,
     uav: InternPool.Index,
     explicit_alignment: InternPool.Alignment,
     src_loc: Zcu.LazySrcLoc,
 ) !codegen.GenResult {
     return self.zigObjectPtr().?.lowerUav(self, pt, uav, explicit_alignment, src_loc);
 }
 
 pub fn getUavVAddr(self: *Elf, uav: InternPool.Index, reloc_info: link.File.RelocInfo) !u64 {
     assert(self.llvm_object == null);
     return self.zigObjectPtr().?.getUavVAddr(self, uav, reloc_info);
 }
 
 /// Returns end pos of collision, if any.
 fn detectAllocCollision(self: *Elf, start: u64, size: u64) !?u64 {
     const small_ptr = self.ptr_width == .p32;
     const ehdr_size: u64 = if (small_ptr) @sizeOf(elf.Elf32_Ehdr) else @sizeOf(elf.Elf64_Ehdr);
     if (start < ehdr_size)
         return ehdr_size;
 
     var at_end = true;
     const end = start + padToIdeal(size);
 
     if (self.shdr_table_offset) |off| {
         const shdr_size: u64 = if (small_ptr) @sizeOf(elf.Elf32_Shdr) else @sizeOf(elf.Elf64_Shdr);
         const tight_size = self.sections.items(.shdr).len * shdr_size;
         const increased_size = padToIdeal(tight_size);
         const test_end = off +| increased_size;
         if (start < test_end) {
             if (end > off) return test_end;
             if (test_end < std.math.maxInt(u64)) at_end = false;
         }
     }
 
     for (self.sections.items(.shdr)) |shdr| {
         if (shdr.sh_type == elf.SHT_NOBITS) continue;
         const increased_size = padToIdeal(shdr.sh_size);
         const test_end = shdr.sh_offset +| increased_size;
         if (start < test_end) {
             if (end > shdr.sh_offset) return test_end;
             if (test_end < std.math.maxInt(u64)) at_end = false;
         }
     }
 
     for (self.phdrs.items) |phdr| {
         if (phdr.p_type != elf.PT_LOAD) continue;
         const increased_size = padToIdeal(phdr.p_filesz);
         const test_end = phdr.p_offset +| increased_size;
         if (start < test_end) {
             if (end > phdr.p_offset) return test_end;
             if (test_end < std.math.maxInt(u64)) at_end = false;
         }
     }
 
     if (at_end) try self.base.file.?.setEndPos(end);
     return null;
 }
 
 pub fn allocatedSize(self: *Elf, start: u64) u64 {
     if (start == 0) return 0;
     var min_pos: u64 = std.math.maxInt(u64);
     if (self.shdr_table_offset) |off| {
         if (off > start and off < min_pos) min_pos = off;
     }
     for (self.sections.items(.shdr)) |section| {
         if (section.sh_offset <= start) continue;
         if (section.sh_offset < min_pos) min_pos = section.sh_offset;
     }
     for (self.phdrs.items) |phdr| {
         if (phdr.p_offset <= start) continue;
         if (phdr.p_offset < min_pos) min_pos = phdr.p_offset;
     }
     return min_pos - start;
 }
 
 pub fn findFreeSpace(self: *Elf, object_size: u64, min_alignment: u64) !u64 {
     var start: u64 = 0;
     while (try self.detectAllocCollision(start, object_size)) |item_end| {
         start = mem.alignForward(u64, item_end, min_alignment);
     }
     return start;
 }
 
 pub fn growSection(self: *Elf, shdr_index: u32, needed_size: u64, min_alignment: u64) !void {
     const shdr = &self.sections.items(.shdr)[shdr_index];
 
     if (shdr.sh_type != elf.SHT_NOBITS) {
         const allocated_size = self.allocatedSize(shdr.sh_offset);
         log.debug("allocated size {x} of '{s}', needed size {x}", .{
             allocated_size,
             self.getShString(shdr.sh_name),
             needed_size,
         });
 
         if (needed_size > allocated_size) {
             const existing_size = shdr.sh_size;
             shdr.sh_size = 0;
             // Must move the entire section.
             const new_offset = try self.findFreeSpace(needed_size, min_alignment);
 
             log.debug("new '{s}' file offset 0x{x} to 0x{x}", .{
                 self.getShString(shdr.sh_name),
                 new_offset,
                 new_offset + existing_size,
             });
 
             const amt = try self.base.file.?.copyRangeAll(
                 shdr.sh_offset,
                 self.base.file.?,
                 new_offset,
                 existing_size,
             );
             // TODO figure out what to about this error condition - how to communicate it up.
             if (amt != existing_size) return error.InputOutput;
 
             shdr.sh_offset = new_offset;
         } else if (shdr.sh_offset + allocated_size == std.math.maxInt(u64)) {
             try self.base.file.?.setEndPos(shdr.sh_offset + needed_size);
         }
     }
 
     shdr.sh_size = needed_size;
     self.markDirty(shdr_index);
 }
 
 fn markDirty(self: *Elf, shdr_index: u32) void {
     if (self.zigObjectPtr()) |zo| {
         for ([_]?Symbol.Index{
             zo.debug_info_index,
             zo.debug_abbrev_index,
             zo.debug_aranges_index,
             zo.debug_str_index,
             zo.debug_line_index,
             zo.debug_line_str_index,
             zo.debug_loclists_index,
             zo.debug_rnglists_index,
         }, [_]*bool{
             &zo.debug_info_section_dirty,
             &zo.debug_abbrev_section_dirty,
             &zo.debug_aranges_section_dirty,
             &zo.debug_str_section_dirty,
             &zo.debug_line_section_dirty,
             &zo.debug_line_str_section_dirty,
             &zo.debug_loclists_section_dirty,
             &zo.debug_rnglists_section_dirty,
         }) |maybe_sym_index, dirty| {
             const sym_index = maybe_sym_index orelse continue;
             if (zo.symbol(sym_index).atom(self).?.output_section_index == shdr_index) {
                 dirty.* = true;
                 break;
             }
         }
     }
 }
 
 const AllocateChunkResult = struct {
     value: u64,
     placement: Ref,
 };
 
 pub fn allocateChunk(self: *Elf, args: struct {
     size: u64,
     shndx: u32,
     alignment: Atom.Alignment,
     requires_padding: bool = true,
 }) !AllocateChunkResult {
     const slice = self.sections.slice();
     const shdr = &slice.items(.shdr)[args.shndx];
     const free_list = &slice.items(.free_list)[args.shndx];
     const last_atom_ref = &slice.items(.last_atom)[args.shndx];
     const new_atom_ideal_capacity = if (args.requires_padding) padToIdeal(args.size) else args.size;
 
     // First we look for an appropriately sized free list node.
     // The list is unordered. We'll just take the first thing that works.
     const res: AllocateChunkResult = blk: {
         var i: usize = if (self.base.child_pid == null) 0 else free_list.items.len;
         while (i < free_list.items.len) {
             const big_atom_ref = free_list.items[i];
             const big_atom = self.atom(big_atom_ref).?;
             // We now have a pointer to a live atom that has too much capacity.
             // Is it enough that we could fit this new atom?
             const cap = big_atom.capacity(self);
             const ideal_capacity = if (args.requires_padding) padToIdeal(cap) else cap;
             const ideal_capacity_end_vaddr = std.math.add(u64, @intCast(big_atom.value), ideal_capacity) catch ideal_capacity;
             const capacity_end_vaddr = @as(u64, @intCast(big_atom.value)) + cap;
             const new_start_vaddr_unaligned = capacity_end_vaddr - new_atom_ideal_capacity;
             const new_start_vaddr = args.alignment.backward(new_start_vaddr_unaligned);
             if (new_start_vaddr < ideal_capacity_end_vaddr) {
                 // Additional bookkeeping here to notice if this free list node
                 // should be deleted because the block that it points to has grown to take up
                 // more of the extra capacity.
                 if (!big_atom.freeListEligible(self)) {
                     _ = free_list.swapRemove(i);
                 } else {
                     i += 1;
                 }
                 continue;
             }
             // At this point we know that we will place the new block here. But the
             // remaining question is whether there is still yet enough capacity left
             // over for there to still be a free list node.
             const remaining_capacity = new_start_vaddr - ideal_capacity_end_vaddr;
             const keep_free_list_node = remaining_capacity >= min_text_capacity;
 
             if (!keep_free_list_node) {
                 _ = free_list.swapRemove(i);
             }
             break :blk .{ .value = new_start_vaddr, .placement = big_atom_ref };
         } else if (self.atom(last_atom_ref.*)) |last_atom| {
             const ideal_capacity = if (args.requires_padding) padToIdeal(last_atom.size) else last_atom.size;
             const ideal_capacity_end_vaddr = @as(u64, @intCast(last_atom.value)) + ideal_capacity;
             const new_start_vaddr = args.alignment.forward(ideal_capacity_end_vaddr);
             break :blk .{ .value = new_start_vaddr, .placement = last_atom.ref() };
         } else {
             break :blk .{ .value = 0, .placement = .{} };
         }
     };
 
     log.debug("allocated chunk (size({x}),align({x})) at 0x{x} (file(0x{x}))", .{
         args.size,
         args.alignment.toByteUnits().?,
         shdr.sh_addr + res.value,
         shdr.sh_offset + res.value,
     });
 
     const expand_section = if (self.atom(res.placement)) |placement_atom|
         placement_atom.nextAtom(self) == null
     else
         true;
     if (expand_section) {
         const needed_size = res.value + args.size;
         try self.growSection(args.shndx, needed_size, args.alignment.toByteUnits().?);
     }
 
     return res;
 }
 
 pub fn flush(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_node: std.Progress.Node) link.File.FlushError!void {
     const use_lld = build_options.have_llvm and self.base.comp.config.use_lld;
     if (use_lld) {
         return self.linkWithLLD(arena, tid, prog_node);
     }
     try self.flushModule(arena, tid, prog_node);
 }
 
 pub fn flushModule(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_node: std.Progress.Node) link.File.FlushError!void {
     const tracy = trace(@src());
     defer tracy.end();
 
     const comp = self.base.comp;
     const gpa = comp.gpa;
 
     if (self.llvm_object) |llvm_object| {
         try self.base.emitLlvmObject(arena, llvm_object, prog_node);
         const use_lld = build_options.have_llvm and comp.config.use_lld;
         if (use_lld) return;
     }
 
     const sub_prog_node = prog_node.start("ELF Flush", 0);
     defer sub_prog_node.end();
 
     const target = self.getTarget();
     const link_mode = comp.config.link_mode;
     const directory = self.base.emit.root_dir; // Just an alias to make it shorter to type.
     const module_obj_path: ?[]const u8 = if (self.base.zcu_object_sub_path) |path| blk: {
         const full_out_path = try directory.join(arena, &[_][]const u8{self.base.emit.sub_path});
         if (fs.path.dirname(full_out_path)) |dirname| {
             break :blk try fs.path.join(arena, &.{ dirname, path });
         } else {
             break :blk path;
         }
     } else null;
 
     // --verbose-link
     if (comp.verbose_link) try self.dumpArgv(comp);
 
     if (self.zigObjectPtr()) |zig_object| try zig_object.flushModule(self, tid);
     if (self.base.isStaticLib()) return relocatable.flushStaticLib(self, comp, module_obj_path);
     if (self.base.isObject()) return relocatable.flushObject(self, comp, module_obj_path);
 
     const csu = try CsuObjects.init(arena, comp);
 
     // csu prelude
     if (csu.crt0) |path| try parseObjectReportingFailure(self, path);
     if (csu.crti) |path| try parseObjectReportingFailure(self, path);
     if (csu.crtbegin) |path| try parseObjectReportingFailure(self, path);
 
     for (comp.objects) |obj| {
         if (obj.isObject()) {
             try parseObjectReportingFailure(self, obj.path);
         } else {
             try parseLibraryReportingFailure(self, .{ .path = obj.path }, obj.must_link);
         }
     }
 
     // This is a set of object files emitted by clang in a single `build-exe` invocation.
     // For instance, the implicit `a.o` as compiled by `zig build-exe a.c` will end up
     // in this set.
     for (comp.c_object_table.keys()) |key| {
         try parseObjectReportingFailure(self, key.status.success.object_path);
     }
 
     if (module_obj_path) |path| try parseObjectReportingFailure(self, path);
 
     if (comp.config.any_sanitize_thread) try parseCrtFileReportingFailure(self, comp.tsan_lib.?);
     if (comp.config.any_fuzz) try parseCrtFileReportingFailure(self, comp.fuzzer_lib.?);
 
     // libc
     if (!comp.skip_linker_dependencies and !comp.config.link_libc) {
         if (comp.libc_static_lib) |lib| try parseCrtFileReportingFailure(self, lib);
     }
 
     var system_libs = std.ArrayList(SystemLib).init(arena);
 
     try system_libs.ensureUnusedCapacity(comp.system_libs.values().len);
     for (comp.system_libs.values()) |lib_info| {
         system_libs.appendAssumeCapacity(.{ .needed = lib_info.needed, .path = lib_info.path.? });
     }
 
     // libc++ dep
     if (comp.config.link_libcpp) {
         try system_libs.ensureUnusedCapacity(2);
         system_libs.appendAssumeCapacity(.{ .path = comp.libcxxabi_static_lib.?.full_object_path });
         system_libs.appendAssumeCapacity(.{ .path = comp.libcxx_static_lib.?.full_object_path });
     }
 
     // libunwind dep
     if (comp.config.link_libunwind) {
         try system_libs.append(.{ .path = comp.libunwind_static_lib.?.full_object_path });
     }
 
     // libc dep
     comp.link_error_flags.missing_libc = false;
     if (comp.config.link_libc) {
         if (comp.libc_installation) |lc| {
             const flags = target_util.libcFullLinkFlags(target);
             try system_libs.ensureUnusedCapacity(flags.len);
 
             var test_path = std.ArrayList(u8).init(arena);
             var checked_paths = std.ArrayList([]const u8).init(arena);
 
             for (flags) |flag| {
                 checked_paths.clearRetainingCapacity();
                 const lib_name = flag["-l".len..];
 
                 success: {
                     if (!self.base.isStatic()) {
                         if (try self.accessLibPath(arena, &test_path, &checked_paths, lc.crt_dir.?, lib_name, .dynamic))
                             break :success;
                     }
                     if (try self.accessLibPath(arena, &test_path, &checked_paths, lc.crt_dir.?, lib_name, .static))
                         break :success;
 
                     try self.reportMissingLibraryError(
                         checked_paths.items,
                         "missing system library: '{s}' was not found",
                         .{lib_name},
                     );
 
                     continue;
                 }
 
                 const resolved_path = try arena.dupe(u8, test_path.items);
                 system_libs.appendAssumeCapacity(.{ .path = resolved_path });
             }
         } else if (target.isGnuLibC()) {
             try system_libs.ensureUnusedCapacity(glibc.libs.len + 1);
             for (glibc.libs) |lib| {
                 if (lib.removed_in) |rem_in| {
                     if (target.os.version_range.linux.glibc.order(rem_in) != .lt) continue;
                 }
 
                 const lib_path = try std.fmt.allocPrint(arena, "{s}{c}lib{s}.so.{d}", .{
                     comp.glibc_so_files.?.dir_path, fs.path.sep, lib.name, lib.sover,
                 });
                 system_libs.appendAssumeCapacity(.{ .path = lib_path });
             }
             system_libs.appendAssumeCapacity(.{
                 .path = try comp.get_libc_crt_file(arena, "libc_nonshared.a"),
             });
         } else if (target.isMusl()) {
             const path = try comp.get_libc_crt_file(arena, switch (link_mode) {
                 .static => "libc.a",
                 .dynamic => "libc.so",
             });
             try system_libs.append(.{ .path = path });
         } else {
             comp.link_error_flags.missing_libc = true;
         }
     }
 
     for (system_libs.items) |lib| {
         try self.parseLibraryReportingFailure(lib, false);
     }
 
     // Finally, as the last input objects we add compiler_rt and CSU postlude (if any).
 
     // compiler-rt. Since compiler_rt exports symbols like `memset`, it needs
     // to be after the shared libraries, so they are picked up from the shared
     // libraries, not libcompiler_rt.
     if (comp.compiler_rt_lib) |crt_file| {
         try parseLibraryReportingFailure(self, .{ .path = crt_file.full_object_path }, false);
     } else if (comp.compiler_rt_obj) |crt_file| {
         try parseObjectReportingFailure(self, crt_file.full_object_path);
     }
 
     // csu postlude
     if (csu.crtend) |path| try parseObjectReportingFailure(self, path);
     if (csu.crtn) |path| try parseObjectReportingFailure(self, path);
 
     if (self.base.hasErrors()) return error.FlushFailure;
 
     // Dedup shared objects
     {
         var seen_dsos = std.StringHashMap(void).init(gpa);
         defer seen_dsos.deinit();
         try seen_dsos.ensureTotalCapacity(@as(u32, @intCast(self.shared_objects.items.len)));
 
         var i: usize = 0;
         while (i < self.shared_objects.items.len) {
             const index = self.shared_objects.items[i];
             const shared_object = self.file(index).?.shared_object;
             const soname = shared_object.soname();
             const gop = seen_dsos.getOrPutAssumeCapacity(soname);
             if (gop.found_existing) {
                 _ = self.shared_objects.orderedRemove(i);
             } else i += 1;
         }
     }
 
     // If we haven't already, create a linker-generated input file comprising of
     // linker-defined synthetic symbols only such as `_DYNAMIC`, etc.
     if (self.linker_defined_index == null) {
         const index = @as(File.Index, @intCast(try self.files.addOne(gpa)));
         self.files.set(index, .{ .linker_defined = .{ .index = index } });
         self.linker_defined_index = index;
         const object = self.linkerDefinedPtr().?;
         try object.init(gpa);
         try object.initSymbols(self);
     }
 
     // Now, we are ready to resolve the symbols across all input files.
     // We will first resolve the files in the ZigObject, next in the parsed
     // input Object files.
     // Any qualifing unresolved symbol will be upgraded to an absolute, weak
     // symbol for potential resolution at load-time.
     try self.resolveSymbols();
     self.markEhFrameAtomsDead();
     try self.resolveMergeSections();
 
     for (self.objects.items) |index| {
         try self.file(index).?.object.convertCommonSymbols(self);
     }
     self.markImportsExports();
 
     if (self.base.gc_sections) {
         try gc.gcAtoms(self);
 
         if (self.base.print_gc_sections) {
             try gc.dumpPrunedAtoms(self);
         }
     }
 
     self.checkDuplicates() catch |err| switch (err) {
         error.HasDuplicates => return error.FlushFailure,
         else => |e| return e,
     };
 
     try self.addCommentString();
     try self.finalizeMergeSections();
     try self.initOutputSections();
     if (self.linkerDefinedPtr()) |obj| {
         try obj.initStartStopSymbols(self);
     }
     self.claimUnresolved();
 
     // Scan and create missing synthetic entries such as GOT indirection.
     try self.scanRelocs();
 
     // Generate and emit synthetic sections.
     try self.initSyntheticSections();
     try self.initSpecialPhdrs();
     try self.sortShdrs();
 
     try self.setDynamicSection(self.rpath_table.keys());
     self.sortDynamicSymtab();
     try self.setHashSections();
     try self.setVersionSymtab();
 
     try self.sortInitFini();
     try self.updateMergeSectionSizes();
     try self.updateSectionSizes();
 
     try self.addLoadPhdrs();
     try self.allocatePhdrTable();
     try self.allocateAllocSections();
     try self.sortPhdrs();
     try self.allocateNonAllocSections();
     self.allocateSpecialPhdrs();
     if (self.linkerDefinedPtr()) |obj| {
         obj.allocateSymbols(self);
     }
 
     // Dump the state for easy debugging.
     // State can be dumped via `--debug-log link_state`.
     if (build_options.enable_logging) {
         state_log.debug("{}", .{self.dumpState()});
     }
 
     // Beyond this point, everything has been allocated a virtual address and we can resolve
     // the relocations, and commit objects to file.
     for (self.objects.items) |index| {
         self.file(index).?.object.dirty = false;
     }
     // TODO: would state tracking be more appropriate here? perhaps even custom relocation type?
     self.rela_dyn.clearRetainingCapacity();
     self.rela_plt.clearRetainingCapacity();
 
     if (self.zigObjectPtr()) |zo| {
         var has_reloc_errors = false;
         for (zo.atoms_indexes.items) |atom_index| {
             const atom_ptr = zo.atom(atom_index) orelse continue;
             if (!atom_ptr.alive) continue;
             const out_shndx = atom_ptr.output_section_index;
             const shdr = &self.sections.items(.shdr)[out_shndx];
             if (shdr.sh_type == elf.SHT_NOBITS) continue;
             const code = try zo.codeAlloc(self, atom_index);
             defer gpa.free(code);
             const file_offset = atom_ptr.offset(self);
             atom_ptr.resolveRelocsAlloc(self, code) catch |err| switch (err) {
                 error.RelocFailure, error.RelaxFailure => has_reloc_errors = true,
                 error.UnsupportedCpuArch => {
                     try self.reportUnsupportedCpuArch();
                     return error.FlushFailure;
                 },
                 else => |e| return e,
             };
             try self.base.file.?.pwriteAll(code, file_offset);
         }
 
         if (has_reloc_errors) return error.FlushFailure;
     }
 
     try self.writePhdrTable();
     try self.writeShdrTable();
     try self.writeAtoms();
     try self.writeMergeSections();
 
     self.writeSyntheticSections() catch |err| switch (err) {
         error.RelocFailure => return error.FlushFailure,
         error.UnsupportedCpuArch => {
             try self.reportUnsupportedCpuArch();
             return error.FlushFailure;
         },
         else => |e| return e,
     };
 
     if (self.base.isExe() and self.linkerDefinedPtr().?.entry_index == null) {
         log.debug("flushing. no_entry_point_found = true", .{});
         comp.link_error_flags.no_entry_point_found = true;
     } else {
         log.debug("flushing. no_entry_point_found = false", .{});
         comp.link_error_flags.no_entry_point_found = false;
         try self.writeElfHeader();
     }
 
     if (self.base.hasErrors()) return error.FlushFailure;
 }
 
 /// --verbose-link output
 fn dumpArgv(self: *Elf, comp: *Compilation) !void {
     const gpa = self.base.comp.gpa;
     var arena_allocator = std.heap.ArenaAllocator.init(gpa);
     defer arena_allocator.deinit();
     const arena = arena_allocator.allocator();
 
     const target = self.getTarget();
     const link_mode = self.base.comp.config.link_mode;
     const directory = self.base.emit.root_dir; // Just an alias to make it shorter to type.
     const full_out_path = try directory.join(arena, &[_][]const u8{self.base.emit.sub_path});
     const module_obj_path: ?[]const u8 = if (self.base.zcu_object_sub_path) |path| blk: {
         if (fs.path.dirname(full_out_path)) |dirname| {
             break :blk try fs.path.join(arena, &.{ dirname, path });
         } else {
             break :blk path;
         }
     } else null;
 
     const csu = try CsuObjects.init(arena, comp);
     const compiler_rt_path: ?[]const u8 = blk: {
         if (comp.compiler_rt_lib) |x| break :blk x.full_object_path;
         if (comp.compiler_rt_obj) |x| break :blk x.full_object_path;
         break :blk null;
     };
 
     var argv = std.ArrayList([]const u8).init(arena);
 
     try argv.append("zig");
 
     if (self.base.isStaticLib()) {
         try argv.append("ar");
     } else {
         try argv.append("ld");
     }
 
     if (self.base.isObject()) {
         try argv.append("-r");
     }
 
     try argv.append("-o");
     try argv.append(full_out_path);
 
     if (self.base.isRelocatable()) {
         for (comp.objects) |obj| {
             try argv.append(obj.path);
         }
 
         for (comp.c_object_table.keys()) |key| {
             try argv.append(key.status.success.object_path);
         }
 
         if (module_obj_path) |p| {
             try argv.append(p);
         }
     } else {
         if (!self.base.isStatic()) {
             if (target.dynamic_linker.get()) |path| {
                 try argv.append("-dynamic-linker");
                 try argv.append(path);
             }
         }
 
         if (self.base.isDynLib()) {
             if (self.soname) |name| {
                 try argv.append("-soname");
                 try argv.append(name);
             }
         }
 
         if (self.entry_name) |name| {
             try argv.appendSlice(&.{ "--entry", name });
         }
 
         for (self.rpath_table.keys()) |rpath| {
             try argv.appendSlice(&.{ "-rpath", rpath });
         }
 
         try argv.appendSlice(&.{
             "-z",
             try std.fmt.allocPrint(arena, "stack-size={d}", .{self.base.stack_size}),
         });
 
         try argv.append(try std.fmt.allocPrint(arena, "--image-base={d}", .{self.image_base}));
 
         if (self.base.gc_sections) {
             try argv.append("--gc-sections");
         }
 
         if (self.base.print_gc_sections) {
             try argv.append("--print-gc-sections");
         }
 
         if (comp.link_eh_frame_hdr) {
             try argv.append("--eh-frame-hdr");
         }
 
         if (comp.config.rdynamic) {
             try argv.append("--export-dynamic");
         }
 
         if (self.z_notext) {
             try argv.append("-z");
             try argv.append("notext");
         }
 
         if (self.z_nocopyreloc) {
             try argv.append("-z");
             try argv.append("nocopyreloc");
         }
 
         if (self.z_now) {
             try argv.append("-z");
             try argv.append("now");
         }
 
         if (self.base.isStatic()) {
             try argv.append("-static");
         } else if (self.isEffectivelyDynLib()) {
             try argv.append("-shared");
         }
 
         if (comp.config.pie and self.base.isExe()) {
             try argv.append("-pie");
         }
 
         if (comp.config.debug_format == .strip) {
             try argv.append("-s");
         }
 
         // csu prelude
         if (csu.crt0) |v| try argv.append(v);
         if (csu.crti) |v| try argv.append(v);
         if (csu.crtbegin) |v| try argv.append(v);
 
         for (self.lib_dirs) |lib_dir| {
             try argv.append("-L");
             try argv.append(lib_dir);
         }
 
         if (comp.config.link_libc) {
             if (self.base.comp.libc_installation) |libc_installation| {
                 try argv.append("-L");
                 try argv.append(libc_installation.crt_dir.?);
             }
         }
 
         var whole_archive = false;
         for (comp.objects) |obj| {
             if (obj.must_link and !whole_archive) {
                 try argv.append("-whole-archive");
                 whole_archive = true;
             } else if (!obj.must_link and whole_archive) {
                 try argv.append("-no-whole-archive");
                 whole_archive = false;
             }
 
             if (obj.loption) {
                 assert(obj.path[0] == ':');
                 try argv.append("-l");
             }
             try argv.append(obj.path);
         }
         if (whole_archive) {
             try argv.append("-no-whole-archive");
             whole_archive = false;
         }
 
         for (comp.c_object_table.keys()) |key| {
             try argv.append(key.status.success.object_path);
         }
 
         if (module_obj_path) |p| {
             try argv.append(p);
         }
 
         if (comp.config.any_sanitize_thread) {
             try argv.append(comp.tsan_lib.?.full_object_path);
         }
 
         if (comp.config.any_fuzz) {
             try argv.append(comp.fuzzer_lib.?.full_object_path);
         }
 
         // libc
         if (!comp.skip_linker_dependencies and !comp.config.link_libc) {
             if (comp.libc_static_lib) |lib| {
                 try argv.append(lib.full_object_path);
             }
         }
 
         // Shared libraries.
         // Worst-case, we need an --as-needed argument for every lib, as well
         // as one before and one after.
         try argv.ensureUnusedCapacity(self.base.comp.system_libs.keys().len * 2 + 2);
         argv.appendAssumeCapacity("--as-needed");
         var as_needed = true;
 
         for (self.base.comp.system_libs.values()) |lib_info| {
             const lib_as_needed = !lib_info.needed;
             switch ((@as(u2, @intFromBool(lib_as_needed)) << 1) | @intFromBool(as_needed)) {
                 0b00, 0b11 => {},
                 0b01 => {
                     argv.appendAssumeCapacity("--no-as-needed");
                     as_needed = false;
                 },
                 0b10 => {
                     argv.appendAssumeCapacity("--as-needed");
                     as_needed = true;
                 },
             }
             argv.appendAssumeCapacity(lib_info.path.?);
         }
 
         if (!as_needed) {
             argv.appendAssumeCapacity("--as-needed");
             as_needed = true;
         }
 
         // libc++ dep
         if (comp.config.link_libcpp) {
             try argv.append(comp.libcxxabi_static_lib.?.full_object_path);
             try argv.append(comp.libcxx_static_lib.?.full_object_path);
         }
 
         // libunwind dep
         if (comp.config.link_libunwind) {
             try argv.append(comp.libunwind_static_lib.?.full_object_path);
         }
 
         // libc dep
         if (comp.config.link_libc) {
             if (self.base.comp.libc_installation != null) {
                 const needs_grouping = link_mode == .static;
                 if (needs_grouping) try argv.append("--start-group");
                 try argv.appendSlice(target_util.libcFullLinkFlags(target));
                 if (needs_grouping) try argv.append("--end-group");
             } else if (target.isGnuLibC()) {
                 for (glibc.libs) |lib| {
                     if (lib.removed_in) |rem_in| {
                         if (target.os.version_range.linux.glibc.order(rem_in) != .lt) continue;
                     }
 
                     const lib_path = try std.fmt.allocPrint(arena, "{s}{c}lib{s}.so.{d}", .{
                         comp.glibc_so_files.?.dir_path, fs.path.sep, lib.name, lib.sover,
                     });
                     try argv.append(lib_path);
                 }
                 try argv.append(try comp.get_libc_crt_file(arena, "libc_nonshared.a"));
             } else if (target.isMusl()) {
                 try argv.append(try comp.get_libc_crt_file(arena, switch (link_mode) {
                     .static => "libc.a",
                     .dynamic => "libc.so",
                 }));
             }
         }
 
         // compiler-rt
         if (compiler_rt_path) |p| {
             try argv.append(p);
         }
 
         // crt postlude
         if (csu.crtend) |v| try argv.append(v);
         if (csu.crtn) |v| try argv.append(v);
     }
 
     Compilation.dump_argv(argv.items);
 }
 
 pub const ParseError = error{
     /// Indicates the error is already reported on `Compilation.link_errors`.
     LinkFailure,
 
     OutOfMemory,
     Overflow,
     InputOutput,
     EndOfStream,
     FileSystem,
     NotSupported,
     InvalidCharacter,
     UnknownFileType,
 } || LdScript.Error || fs.Dir.AccessError || fs.File.SeekError || fs.File.OpenError || fs.File.ReadError;
 
 fn parseCrtFileReportingFailure(self: *Elf, crt_file: Compilation.CRTFile) error{OutOfMemory}!void {
     if (crt_file.isObject()) {
         try parseObjectReportingFailure(self, crt_file.full_object_path);
     } else {
         try parseLibraryReportingFailure(self, .{ .path = crt_file.full_object_path }, false);
     }
 }
 
 pub fn parseObjectReportingFailure(self: *Elf, path: []const u8) error{OutOfMemory}!void {
     self.parseObject(path) catch |err| switch (err) {
         error.LinkFailure => return, // already reported
         error.OutOfMemory => return error.OutOfMemory,
         else => |e| try self.addParseError(path, "unable to parse object: {s}", .{@errorName(e)}),
     };
 }
 
 pub fn parseLibraryReportingFailure(self: *Elf, lib: SystemLib, must_link: bool) error{OutOfMemory}!void {
     self.parseLibrary(lib, must_link) catch |err| switch (err) {
         error.LinkFailure => return, // already reported
         error.OutOfMemory => return error.OutOfMemory,
         else => |e| try self.addParseError(lib.path, "unable to parse library: {s}", .{@errorName(e)}),
     };
 }
 
 fn parseLibrary(self: *Elf, lib: SystemLib, must_link: bool) ParseError!void {
     const tracy = trace(@src());
     defer tracy.end();
     if (try Archive.isArchive(lib.path)) {
         try self.parseArchive(lib.path, must_link);
     } else if (try SharedObject.isSharedObject(lib.path)) {
         try self.parseSharedObject(lib);
     } else {
         try self.parseLdScript(lib);
     }
 }
 
 fn parseObject(self: *Elf, path: []const u8) ParseError!void {
     const tracy = trace(@src());
     defer tracy.end();
 
     const gpa = self.base.comp.gpa;
     const handle = try fs.cwd().openFile(path, .{});
     const fh = try self.addFileHandle(handle);
 
     const index = @as(File.Index, @intCast(try self.files.addOne(gpa)));
     self.files.set(index, .{ .object = .{
         .path = try gpa.dupe(u8, path),
         .file_handle = fh,
         .index = index,
     } });
     try self.objects.append(gpa, index);
 
     const object = self.file(index).?.object;
     try object.parse(self);
 }
 
 fn parseArchive(self: *Elf, path: []const u8, must_link: bool) ParseError!void {
     const tracy = trace(@src());
     defer tracy.end();
 
     const gpa = self.base.comp.gpa;
     const handle = try fs.cwd().openFile(path, .{});
     const fh = try self.addFileHandle(handle);
 
     var archive = Archive{};
     defer archive.deinit(gpa);
     try archive.parse(self, path, fh);
 
     const objects = try archive.objects.toOwnedSlice(gpa);
     defer gpa.free(objects);
 
     for (objects) |extracted| {
         const index = @as(File.Index, @intCast(try self.files.addOne(gpa)));
         self.files.set(index, .{ .object = extracted });
         const object = &self.files.items(.data)[index].object;
         object.index = index;
         object.alive = must_link;
         try object.parse(self);
         try self.objects.append(gpa, index);
     }
 }
 
 fn parseSharedObject(self: *Elf, lib: SystemLib) ParseError!void {
     const tracy = trace(@src());
     defer tracy.end();
 
     const gpa = self.base.comp.gpa;
     const handle = try fs.cwd().openFile(lib.path, .{});
     defer handle.close();
 
     const index = @as(File.Index, @intCast(try self.files.addOne(gpa)));
     self.files.set(index, .{ .shared_object = .{
         .path = try gpa.dupe(u8, lib.path),
         .index = index,
         .needed = lib.needed,
         .alive = lib.needed,
     } });
     try self.shared_objects.append(gpa, index);
 
     const shared_object = self.file(index).?.shared_object;
     try shared_object.parse(self, handle);
 }
 
 fn parseLdScript(self: *Elf, lib: SystemLib) ParseError!void {
     const tracy = trace(@src());
     defer tracy.end();
 
     const gpa = self.base.comp.gpa;
     const in_file = try fs.cwd().openFile(lib.path, .{});
     defer in_file.close();
     const data = try in_file.readToEndAlloc(gpa, std.math.maxInt(u32));
     defer gpa.free(data);
 
     var script = LdScript{ .path = lib.path };
     defer script.deinit(gpa);
     try script.parse(data, self);
 
     var arena_allocator = std.heap.ArenaAllocator.init(gpa);
     defer arena_allocator.deinit();
     const arena = arena_allocator.allocator();
 
     var test_path = std.ArrayList(u8).init(arena);
     var checked_paths = std.ArrayList([]const u8).init(arena);
 
     for (script.args.items) |scr_obj| {
         checked_paths.clearRetainingCapacity();
 
         success: {
             if (mem.startsWith(u8, scr_obj.path, "-l")) {
                 const lib_name = scr_obj.path["-l".len..];
 
                 // TODO I think technically we should re-use the mechanism used by the frontend here.
                 // Maybe we should hoist search-strategy all the way here?
                 for (self.lib_dirs) |lib_dir| {
                     if (!self.base.isStatic()) {
                         if (try self.accessLibPath(arena, &test_path, &checked_paths, lib_dir, lib_name, .dynamic))
                             break :success;
                     }
                     if (try self.accessLibPath(arena, &test_path, &checked_paths, lib_dir, lib_name, .static))
                         break :success;
                 }
             } else {
                 var buffer: [fs.max_path_bytes]u8 = undefined;
                 if (fs.realpath(scr_obj.path, &buffer)) |path| {
                     test_path.clearRetainingCapacity();
                     try test_path.writer().writeAll(path);
                     break :success;
                 } else |_| {}
 
                 try checked_paths.append(try arena.dupe(u8, scr_obj.path));
                 for (self.lib_dirs) |lib_dir| {
                     if (try self.accessLibPath(arena, &test_path, &checked_paths, lib_dir, scr_obj.path, null))
                         break :success;
                 }
             }
 
             try self.reportMissingLibraryError(
                 checked_paths.items,
                 "missing library dependency: GNU ld script '{s}' requires '{s}', but file not found",
                 .{
                     lib.path,
                     scr_obj.path,
                 },
             );
             continue;
         }
 
         const full_path = test_path.items;
         self.parseLibrary(.{
             .needed = scr_obj.needed,
             .path = full_path,
         }, false) catch |err| switch (err) {
             error.LinkFailure => continue, // already reported
             else => |e| try self.addParseError(
                 full_path,
                 "unexpected error: parsing library failed with error {s}",
                 .{@errorName(e)},
             ),
         };
     }
 }
 
 pub fn validateEFlags(self: *Elf, file_index: File.Index, e_flags: elf.Elf64_Word) !void {
     if (self.first_eflags == null) {
         self.first_eflags = e_flags;
         return; // there isn't anything to conflict with yet
     }
     const self_eflags: *elf.Elf64_Word = &self.first_eflags.?;
 
     switch (self.getTarget().cpu.arch) {
         .riscv64 => {
             if (e_flags != self_eflags.*) {
                 const riscv_eflags: riscv.RiscvEflags = @bitCast(e_flags);
                 const self_riscv_eflags: *riscv.RiscvEflags = @ptrCast(self_eflags);
 
                 self_riscv_eflags.rvc = self_riscv_eflags.rvc or riscv_eflags.rvc;
                 self_riscv_eflags.tso = self_riscv_eflags.tso or riscv_eflags.tso;
 
                 var any_errors: bool = false;
                 if (self_riscv_eflags.fabi != riscv_eflags.fabi) {
                     any_errors = true;
                     try self.addFileError(
                         file_index,
                         "cannot link object files with different float-point ABIs",
                         .{},
                     );
                 }
                 if (self_riscv_eflags.rve != riscv_eflags.rve) {
                     any_errors = true;
                     try self.addFileError(
                         file_index,
                         "cannot link object files with different RVEs",
                         .{},
                     );
                 }
                 if (any_errors) return error.LinkFailure;
             }
         },
         else => {},
     }
 }
 
 fn accessLibPath(
     self: *Elf,
     arena: Allocator,
     test_path: *std.ArrayList(u8),
     checked_paths: ?*std.ArrayList([]const u8),
     lib_dir_path: []const u8,
     lib_name: []const u8,
     link_mode: ?std.builtin.LinkMode,
 ) !bool {
     const sep = fs.path.sep_str;
     const target = self.getTarget();
     test_path.clearRetainingCapacity();
     const prefix = if (link_mode != null) "lib" else "";
     const suffix = if (link_mode) |mode| switch (mode) {
         .static => target.staticLibSuffix(),
         .dynamic => target.dynamicLibSuffix(),
     } else "";
     try test_path.writer().print("{s}" ++ sep ++ "{s}{s}{s}", .{
         lib_dir_path,
         prefix,
         lib_name,
         suffix,
     });
     if (checked_paths) |cpaths| {
         try cpaths.append(try arena.dupe(u8, test_path.items));
     }
     fs.cwd().access(test_path.items, .{}) catch |err| switch (err) {
         error.FileNotFound => return false,
         else => |e| return e,
     };
     return true;
 }
 
 /// When resolving symbols, we approach the problem similarly to `mold`.
 /// 1. Resolve symbols across all objects (including those preemptively extracted archives).
 /// 2. Resolve symbols across all shared objects.
 /// 3. Mark live objects (see `Elf.markLive`)
 /// 4. Reset state of all resolved globals since we will redo this bit on the pruned set.
 /// 5. Remove references to dead objects/shared objects
 /// 6. Re-run symbol resolution on pruned objects and shared objects sets.
 pub fn resolveSymbols(self: *Elf) !void {
     // Resolve symbols in the ZigObject. For now, we assume that it's always live.
     if (self.zigObjectPtr()) |zo| try zo.asFile().resolveSymbols(self);
     // Resolve symbols on the set of all objects and shared objects (even if some are unneeded).
     for (self.objects.items) |index| try self.file(index).?.resolveSymbols(self);
     for (self.shared_objects.items) |index| try self.file(index).?.resolveSymbols(self);
     if (self.linkerDefinedPtr()) |obj| try obj.asFile().resolveSymbols(self);
 
     // Mark live objects.
     self.markLive();
 
     // Reset state of all globals after marking live objects.
     self.resolver.reset();
 
     // Prune dead objects and shared objects.
     var i: usize = 0;
     while (i < self.objects.items.len) {
         const index = self.objects.items[i];
         if (!self.file(index).?.isAlive()) {
             _ = self.objects.orderedRemove(i);
         } else i += 1;
     }
     i = 0;
     while (i < self.shared_objects.items.len) {
         const index = self.shared_objects.items[i];
         if (!self.file(index).?.isAlive()) {
             _ = self.shared_objects.orderedRemove(i);
         } else i += 1;
     }
 
     {
         // Dedup comdat groups.
         var table = std.StringHashMap(Ref).init(self.base.comp.gpa);
         defer table.deinit();
 
         for (self.objects.items) |index| {
             try self.file(index).?.object.resolveComdatGroups(self, &table);
         }
 
         for (self.objects.items) |index| {
             self.file(index).?.object.markComdatGroupsDead(self);
         }
     }
 
     // Re-resolve the symbols.
     if (self.zigObjectPtr()) |zo| try zo.asFile().resolveSymbols(self);
     for (self.objects.items) |index| try self.file(index).?.resolveSymbols(self);
     for (self.shared_objects.items) |index| try self.file(index).?.resolveSymbols(self);
     if (self.linkerDefinedPtr()) |obj| try obj.asFile().resolveSymbols(self);
 }
 
 /// Traverses all objects and shared objects marking any object referenced by
 /// a live object/shared object as alive itself.
 /// This routine will prune unneeded objects extracted from archives and
 /// unneeded shared objects.
 fn markLive(self: *Elf) void {
     if (self.zigObjectPtr()) |zig_object| zig_object.asFile().markLive(self);
     for (self.objects.items) |index| {
         const file_ptr = self.file(index).?;
         if (file_ptr.isAlive()) file_ptr.markLive(self);
     }
     for (self.shared_objects.items) |index| {
         const file_ptr = self.file(index).?;
         if (file_ptr.isAlive()) file_ptr.markLive(self);
     }
 }
 
 pub fn markEhFrameAtomsDead(self: *Elf) void {
     for (self.objects.items) |index| {
         const file_ptr = self.file(index).?;
         if (!file_ptr.isAlive()) continue;
         file_ptr.object.markEhFrameAtomsDead(self);
     }
 }
 
 fn markImportsExports(self: *Elf) void {
     if (self.zigObjectPtr()) |zo| {
         zo.markImportsExports(self);
     }
     for (self.objects.items) |index| {
         self.file(index).?.object.markImportsExports(self);
     }
     if (!self.isEffectivelyDynLib()) {
         for (self.shared_objects.items) |index| {
             self.file(index).?.shared_object.markImportExports(self);
         }
     }
 }
 
 fn claimUnresolved(self: *Elf) void {
     if (self.zigObjectPtr()) |zig_object| {
         zig_object.claimUnresolved(self);
     }
     for (self.objects.items) |index| {
         self.file(index).?.object.claimUnresolved(self);
     }
 }
 
 /// In scanRelocs we will go over all live atoms and scan their relocs.
 /// This will help us work out what synthetics to emit, GOT indirection, etc.
 /// This is also the point where we will report undefined symbols for any
 /// alloc sections.
 fn scanRelocs(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
 
     var undefs = std.AutoArrayHashMap(SymbolResolver.Index, std.ArrayList(Ref)).init(gpa);
     defer {
         for (undefs.values()) |*refs| {
             refs.deinit();
         }
         undefs.deinit();
     }
 
     var has_reloc_errors = false;
     if (self.zigObjectPtr()) |zo| {
         zo.asFile().scanRelocs(self, &undefs) catch |err| switch (err) {
             error.RelaxFailure => unreachable,
             error.UnsupportedCpuArch => {
                 try self.reportUnsupportedCpuArch();
                 return error.FlushFailure;
             },
             error.RelocFailure => has_reloc_errors = true,
             else => |e| return e,
         };
     }
     for (self.objects.items) |index| {
         self.file(index).?.scanRelocs(self, &undefs) catch |err| switch (err) {
             error.RelaxFailure => unreachable,
             error.UnsupportedCpuArch => {
                 try self.reportUnsupportedCpuArch();
                 return error.FlushFailure;
             },
             error.RelocFailure => has_reloc_errors = true,
             else => |e| return e,
         };
     }
 
     try self.reportUndefinedSymbols(&undefs);
 
     if (has_reloc_errors) return error.FlushFailure;
 
     if (self.zigObjectPtr()) |zo| {
         try zo.asFile().createSymbolIndirection(self);
     }
     for (self.objects.items) |index| {
         try self.file(index).?.createSymbolIndirection(self);
     }
     for (self.shared_objects.items) |index| {
         try self.file(index).?.createSymbolIndirection(self);
     }
     if (self.linkerDefinedPtr()) |obj| {
         try obj.asFile().createSymbolIndirection(self);
     }
     if (self.got.flags.needs_tlsld) {
         log.debug("program needs TLSLD", .{});
         try self.got.addTlsLdSymbol(self);
     }
 }
 
 pub fn initOutputSection(self: *Elf, args: struct {
     name: [:0]const u8,
     flags: u64,
     type: u32,
 }) error{OutOfMemory}!u32 {
     const name = blk: {
         if (self.base.isRelocatable()) break :blk args.name;
         if (args.flags & elf.SHF_MERGE != 0) break :blk args.name;
         const name_prefixes: []const [:0]const u8 = &.{
             ".text",       ".data.rel.ro", ".data", ".rodata", ".bss.rel.ro",       ".bss",
             ".init_array", ".fini_array",  ".tbss", ".tdata",  ".gcc_except_table", ".ctors",
             ".dtors",      ".gnu.warning",
         };
         inline for (name_prefixes) |prefix| {
             if (std.mem.eql(u8, args.name, prefix) or std.mem.startsWith(u8, args.name, prefix ++ ".")) {
                 break :blk prefix;
             }
         }
         break :blk args.name;
     };
     const @"type" = tt: {
         if (self.getTarget().cpu.arch == .x86_64 and args.type == elf.SHT_X86_64_UNWIND)
             break :tt elf.SHT_PROGBITS;
         switch (args.type) {
             elf.SHT_NULL => unreachable,
             elf.SHT_PROGBITS => {
                 if (std.mem.eql(u8, args.name, ".init_array") or std.mem.startsWith(u8, args.name, ".init_array."))
                     break :tt elf.SHT_INIT_ARRAY;
                 if (std.mem.eql(u8, args.name, ".fini_array") or std.mem.startsWith(u8, args.name, ".fini_array."))
                     break :tt elf.SHT_FINI_ARRAY;
                 break :tt args.type;
             },
             else => break :tt args.type,
         }
     };
     const flags = blk: {
         var flags = args.flags;
         if (!self.base.isRelocatable()) {
             flags &= ~@as(u64, elf.SHF_COMPRESSED | elf.SHF_GROUP | elf.SHF_GNU_RETAIN);
         }
         break :blk switch (@"type") {
             elf.SHT_INIT_ARRAY, elf.SHT_FINI_ARRAY => flags | elf.SHF_WRITE,
             else => flags,
         };
     };
     const out_shndx = self.sectionByName(name) orelse try self.addSection(.{
         .type = @"type",
         .flags = flags,
         .name = try self.insertShString(name),
     });
     return out_shndx;
 }
 
 fn linkWithLLD(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_node: std.Progress.Node) !void {
     dev.check(.lld_linker);
 
     const tracy = trace(@src());
     defer tracy.end();
 
     const comp = self.base.comp;
     const gpa = comp.gpa;
 
     const directory = self.base.emit.root_dir; // Just an alias to make it shorter to type.
     const full_out_path = try directory.join(arena, &[_][]const u8{self.base.emit.sub_path});
 
     // If there is no Zig code to compile, then we should skip flushing the output file because it
     // will not be part of the linker line anyway.
     const module_obj_path: ?[]const u8 = if (comp.zcu != null) blk: {
         try self.flushModule(arena, tid, prog_node);
 
         if (fs.path.dirname(full_out_path)) |dirname| {
             break :blk try fs.path.join(arena, &.{ dirname, self.base.zcu_object_sub_path.? });
         } else {
             break :blk self.base.zcu_object_sub_path.?;
         }
     } else null;
 
     const sub_prog_node = prog_node.start("LLD Link", 0);
     defer sub_prog_node.end();
 
     const output_mode = comp.config.output_mode;
     const is_obj = output_mode == .Obj;
     const is_lib = output_mode == .Lib;
     const link_mode = comp.config.link_mode;
     const is_dyn_lib = link_mode == .dynamic and is_lib;
     const is_exe_or_dyn_lib = is_dyn_lib or output_mode == .Exe;
     const have_dynamic_linker = comp.config.link_libc and
         link_mode == .dynamic and is_exe_or_dyn_lib;
     const target = self.getTarget();
     const compiler_rt_path: ?[]const u8 = blk: {
         if (comp.compiler_rt_lib) |x| break :blk x.full_object_path;
         if (comp.compiler_rt_obj) |x| break :blk x.full_object_path;
         break :blk null;
     };
 
     // Here we want to determine whether we can save time by not invoking LLD when the
     // output is unchanged. None of the linker options or the object files that are being
     // linked are in the hash that namespaces the directory we are outputting to. Therefore,
     // we must hash those now, and the resulting digest will form the "id" of the linking
     // job we are about to perform.
     // After a successful link, we store the id in the metadata of a symlink named "lld.id" in
     // the artifact directory. So, now, we check if this symlink exists, and if it matches
     // our digest. If so, we can skip linking. Otherwise, we proceed with invoking LLD.
     const id_symlink_basename = "lld.id";
 
     var man: Cache.Manifest = undefined;
     defer if (!self.base.disable_lld_caching) man.deinit();
 
     var digest: [Cache.hex_digest_len]u8 = undefined;
 
     if (!self.base.disable_lld_caching) {
         man = comp.cache_parent.obtain();
 
         // We are about to obtain this lock, so here we give other processes a chance first.
         self.base.releaseLock();
 
         comptime assert(Compilation.link_hash_implementation_version == 14);
 
         try man.addOptionalFile(self.linker_script);
         try man.addOptionalFile(self.version_script);
         man.hash.add(self.allow_undefined_version);
         man.hash.addOptional(self.enable_new_dtags);
         for (comp.objects) |obj| {
             _ = try man.addFile(obj.path, null);
             man.hash.add(obj.must_link);
             man.hash.add(obj.loption);
         }
         for (comp.c_object_table.keys()) |key| {
             _ = try man.addFile(key.status.success.object_path, null);
         }
         try man.addOptionalFile(module_obj_path);
         try man.addOptionalFile(compiler_rt_path);
         try man.addOptionalFile(if (comp.tsan_lib) |l| l.full_object_path else null);
         try man.addOptionalFile(if (comp.fuzzer_lib) |l| l.full_object_path else null);
 
         // We can skip hashing libc and libc++ components that we are in charge of building from Zig
         // installation sources because they are always a product of the compiler version + target information.
         man.hash.addOptionalBytes(self.entry_name);
         man.hash.add(self.image_base);
         man.hash.add(self.base.gc_sections);
         man.hash.addOptional(self.sort_section);
         man.hash.add(comp.link_eh_frame_hdr);
         man.hash.add(self.emit_relocs);
         man.hash.add(comp.config.rdynamic);
         man.hash.addListOfBytes(self.lib_dirs);
         man.hash.addListOfBytes(self.rpath_table.keys());
         if (output_mode == .Exe) {
             man.hash.add(self.base.stack_size);
             man.hash.add(self.base.build_id);
         }
         man.hash.addListOfBytes(self.symbol_wrap_set.keys());
         man.hash.add(comp.skip_linker_dependencies);
         man.hash.add(self.z_nodelete);
         man.hash.add(self.z_notext);
         man.hash.add(self.z_defs);
         man.hash.add(self.z_origin);
         man.hash.add(self.z_nocopyreloc);
         man.hash.add(self.z_now);
         man.hash.add(self.z_relro);
         man.hash.add(self.z_common_page_size orelse 0);
         man.hash.add(self.z_max_page_size orelse 0);
         man.hash.add(self.hash_style);
         // strip does not need to go into the linker hash because it is part of the hash namespace
         if (comp.config.link_libc) {
             man.hash.add(comp.libc_installation != null);
             if (comp.libc_installation) |libc_installation| {
                 man.hash.addBytes(libc_installation.crt_dir.?);
             }
             if (have_dynamic_linker) {
                 man.hash.addOptionalBytes(target.dynamic_linker.get());
             }
         }
         man.hash.addOptionalBytes(self.soname);
         man.hash.addOptional(comp.version);
         try link.hashAddSystemLibs(&man, comp.system_libs);
         man.hash.addListOfBytes(comp.force_undefined_symbols.keys());
         man.hash.add(self.base.allow_shlib_undefined);
         man.hash.add(self.bind_global_refs_locally);
         man.hash.add(self.compress_debug_sections);
         man.hash.add(comp.config.any_sanitize_thread);
         man.hash.add(comp.config.any_fuzz);
         man.hash.addOptionalBytes(comp.sysroot);
 
         // We don't actually care whether it's a cache hit or miss; we just need the digest and the lock.
         _ = try man.hit();
         digest = man.final();
 
         var prev_digest_buf: [digest.len]u8 = undefined;
         const prev_digest: []u8 = Cache.readSmallFile(
             directory.handle,
             id_symlink_basename,
             &prev_digest_buf,
         ) catch |err| blk: {
             log.debug("ELF LLD new_digest={s} error: {s}", .{ std.fmt.fmtSliceHexLower(&digest), @errorName(err) });
             // Handle this as a cache miss.
             break :blk prev_digest_buf[0..0];
         };
         if (mem.eql(u8, prev_digest, &digest)) {
             log.debug("ELF LLD digest={s} match - skipping invocation", .{std.fmt.fmtSliceHexLower(&digest)});
             // Hot diggity dog! The output binary is already there.
             self.base.lock = man.toOwnedLock();
             return;
         }
         log.debug("ELF LLD prev_digest={s} new_digest={s}", .{ std.fmt.fmtSliceHexLower(prev_digest), std.fmt.fmtSliceHexLower(&digest) });
 
         // We are about to change the output file to be different, so we invalidate the build hash now.
         directory.handle.deleteFile(id_symlink_basename) catch |err| switch (err) {
             error.FileNotFound => {},
             else => |e| return e,
         };
     }
 
     // Due to a deficiency in LLD, we need to special-case BPF to a simple file
     // copy when generating relocatables. Normally, we would expect `lld -r` to work.
     // However, because LLD wants to resolve BPF relocations which it shouldn't, it fails
     // before even generating the relocatable.
     if (output_mode == .Obj and
         (comp.config.lto or target.isBpfFreestanding()))
     {
         // In this case we must do a simple file copy
         // here. TODO: think carefully about how we can avoid this redundant operation when doing
         // build-obj. See also the corresponding TODO in linkAsArchive.
         const the_object_path = blk: {
             if (comp.objects.len != 0)
                 break :blk comp.objects[0].path;
 
             if (comp.c_object_table.count() != 0)
                 break :blk comp.c_object_table.keys()[0].status.success.object_path;
 
             if (module_obj_path) |p|
                 break :blk p;
 
             // TODO I think this is unreachable. Audit this situation when solving the above TODO
             // regarding eliding redundant object -> object transformations.
             return error.NoObjectsToLink;
         };
         // This can happen when using --enable-cache and using the stage1 backend. In this case
         // we can skip the file copy.
         if (!mem.eql(u8, the_object_path, full_out_path)) {
             try fs.cwd().copyFile(the_object_path, fs.cwd(), full_out_path, .{});
         }
     } else {
         // Create an LLD command line and invoke it.
         var argv = std.ArrayList([]const u8).init(gpa);
         defer argv.deinit();
         // We will invoke ourselves as a child process to gain access to LLD.
         // This is necessary because LLD does not behave properly as a library -
         // it calls exit() and does not reset all global data between invocations.
         const linker_command = "ld.lld";
         try argv.appendSlice(&[_][]const u8{ comp.self_exe_path.?, linker_command });
         if (is_obj) {
             try argv.append("-r");
         }
 
         try argv.append("--error-limit=0");
 
         if (comp.sysroot) |sysroot| {
             try argv.append(try std.fmt.allocPrint(arena, "--sysroot={s}", .{sysroot}));
         }
 
         if (comp.config.lto) {
             switch (comp.root_mod.optimize_mode) {
                 .Debug => {},
                 .ReleaseSmall => try argv.append("--lto-O2"),
                 .ReleaseFast, .ReleaseSafe => try argv.append("--lto-O3"),
             }
         }
         switch (comp.root_mod.optimize_mode) {
             .Debug => {},
             .ReleaseSmall => try argv.append("-O2"),
             .ReleaseFast, .ReleaseSafe => try argv.append("-O3"),
         }
 
         if (self.entry_name) |name| {
             try argv.appendSlice(&.{ "--entry", name });
         }
 
         for (comp.force_undefined_symbols.keys()) |sym| {
             try argv.append("-u");
             try argv.append(sym);
         }
 
         switch (self.hash_style) {
             .gnu => try argv.append("--hash-style=gnu"),
             .sysv => try argv.append("--hash-style=sysv"),
             .both => {}, // this is the default
         }
 
         if (output_mode == .Exe) {
             try argv.appendSlice(&.{
                 "-z",
                 try std.fmt.allocPrint(arena, "stack-size={d}", .{self.base.stack_size}),
             });
 
             switch (self.base.build_id) {
                 .none => {},
                 .fast, .uuid, .sha1, .md5 => {
                     try argv.append(try std.fmt.allocPrint(arena, "--build-id={s}", .{
                         @tagName(self.base.build_id),
                     }));
                 },
                 .hexstring => |hs| {
                     try argv.append(try std.fmt.allocPrint(arena, "--build-id=0x{s}", .{
                         std.fmt.fmtSliceHexLower(hs.toSlice()),
                     }));
                 },
             }
         }
 
         try argv.append(try std.fmt.allocPrint(arena, "--image-base={d}", .{self.image_base}));
 
         if (self.linker_script) |linker_script| {
             try argv.append("-T");
             try argv.append(linker_script);
         }
 
         if (self.sort_section) |how| {
             const arg = try std.fmt.allocPrint(arena, "--sort-section={s}", .{@tagName(how)});
             try argv.append(arg);
         }
 
         if (self.base.gc_sections) {
             try argv.append("--gc-sections");
         }
 
         if (self.base.print_gc_sections) {
             try argv.append("--print-gc-sections");
         }
 
         if (self.print_icf_sections) {
             try argv.append("--print-icf-sections");
         }
 
         if (self.print_map) {
             try argv.append("--print-map");
         }
 
         if (comp.link_eh_frame_hdr) {
             try argv.append("--eh-frame-hdr");
         }
 
         if (self.emit_relocs) {
             try argv.append("--emit-relocs");
         }
 
         if (comp.config.rdynamic) {
             try argv.append("--export-dynamic");
         }
 
         if (comp.config.debug_format == .strip) {
             try argv.append("-s");
         }
 
         if (self.z_nodelete) {
             try argv.append("-z");
             try argv.append("nodelete");
         }
         if (self.z_notext) {
             try argv.append("-z");
             try argv.append("notext");
         }
         if (self.z_defs) {
             try argv.append("-z");
             try argv.append("defs");
         }
         if (self.z_origin) {
             try argv.append("-z");
             try argv.append("origin");
         }
         if (self.z_nocopyreloc) {
             try argv.append("-z");
             try argv.append("nocopyreloc");
         }
         if (self.z_now) {
             // LLD defaults to -zlazy
             try argv.append("-znow");
         }
         if (!self.z_relro) {
             // LLD defaults to -zrelro
             try argv.append("-znorelro");
         }
         if (self.z_common_page_size) |size| {
             try argv.append("-z");
             try argv.append(try std.fmt.allocPrint(arena, "common-page-size={d}", .{size}));
         }
         if (self.z_max_page_size) |size| {
             try argv.append("-z");
             try argv.append(try std.fmt.allocPrint(arena, "max-page-size={d}", .{size}));
         }
 
         if (getLDMOption(target)) |ldm| {
             try argv.append("-m");
             try argv.append(ldm);
         }
 
         if (link_mode == .static) {
             if (target.cpu.arch.isArmOrThumb()) {
                 try argv.append("-Bstatic");
             } else {
                 try argv.append("-static");
             }
         } else if (switch (target.os.tag) {
             else => is_dyn_lib,
             .haiku => is_exe_or_dyn_lib,
         }) {
             try argv.append("-shared");
         }
 
         if (comp.config.pie and output_mode == .Exe) {
             try argv.append("-pie");
         }
 
         if (is_exe_or_dyn_lib and target.os.tag == .netbsd) {
             // Add options to produce shared objects with only 2 PT_LOAD segments.
             // NetBSD expects 2 PT_LOAD segments in a shared object, otherwise
             // ld.elf_so fails loading dynamic libraries with "not found" error.
             // See https://github.com/ziglang/zig/issues/9109 .
             try argv.append("--no-rosegment");
             try argv.append("-znorelro");
         }
 
         try argv.append("-o");
         try argv.append(full_out_path);
 
         // csu prelude
         const csu = try CsuObjects.init(arena, comp);
         if (csu.crt0) |v| try argv.append(v);
         if (csu.crti) |v| try argv.append(v);
         if (csu.crtbegin) |v| try argv.append(v);
 
         for (self.rpath_table.keys()) |rpath| {
             try argv.appendSlice(&.{ "-rpath", rpath });
         }
 
         for (self.symbol_wrap_set.keys()) |symbol_name| {
             try argv.appendSlice(&.{ "-wrap", symbol_name });
         }
 
         for (self.lib_dirs) |lib_dir| {
             try argv.append("-L");
             try argv.append(lib_dir);
         }
 
         if (comp.config.link_libc) {
             if (comp.libc_installation) |libc_installation| {
                 try argv.append("-L");
                 try argv.append(libc_installation.crt_dir.?);
             }
 
             if (have_dynamic_linker) {
                 if (target.dynamic_linker.get()) |dynamic_linker| {
                     try argv.append("-dynamic-linker");
                     try argv.append(dynamic_linker);
                 }
             }
         }
 
         if (is_dyn_lib) {
             if (self.soname) |soname| {
                 try argv.append("-soname");
                 try argv.append(soname);
             }
             if (self.version_script) |version_script| {
                 try argv.append("-version-script");
                 try argv.append(version_script);
             }
             if (self.allow_undefined_version) {
                 try argv.append("--undefined-version");
             } else {
                 try argv.append("--no-undefined-version");
             }
             if (self.enable_new_dtags) |enable_new_dtags| {
                 if (enable_new_dtags) {
                     try argv.append("--enable-new-dtags");
                 } else {
                     try argv.append("--disable-new-dtags");
                 }
             }
         }
 
         // Positional arguments to the linker such as object files.
         var whole_archive = false;
         for (comp.objects) |obj| {
             if (obj.must_link and !whole_archive) {
                 try argv.append("-whole-archive");
                 whole_archive = true;
             } else if (!obj.must_link and whole_archive) {
                 try argv.append("-no-whole-archive");
                 whole_archive = false;
             }
 
             if (obj.loption) {
                 assert(obj.path[0] == ':');
                 try argv.append("-l");
             }
             try argv.append(obj.path);
         }
         if (whole_archive) {
             try argv.append("-no-whole-archive");
             whole_archive = false;
         }
 
         for (comp.c_object_table.keys()) |key| {
             try argv.append(key.status.success.object_path);
         }
 
         if (module_obj_path) |p| {
             try argv.append(p);
         }
 
         if (comp.tsan_lib) |lib| {
             assert(comp.config.any_sanitize_thread);
             try argv.append(lib.full_object_path);
         }
 
         if (comp.fuzzer_lib) |lib| {
             assert(comp.config.any_fuzz);
             try argv.append(lib.full_object_path);
         }
 
         // libc
         if (is_exe_or_dyn_lib and
             !comp.skip_linker_dependencies and
             !comp.config.link_libc)
         {
             if (comp.libc_static_lib) |lib| {
                 try argv.append(lib.full_object_path);
             }
         }
 
         // Shared libraries.
         if (is_exe_or_dyn_lib) {
             const system_libs = comp.system_libs.keys();
             const system_libs_values = comp.system_libs.values();
 
             // Worst-case, we need an --as-needed argument for every lib, as well
             // as one before and one after.
             try argv.ensureUnusedCapacity(system_libs.len * 2 + 2);
             argv.appendAssumeCapacity("--as-needed");
             var as_needed = true;
 
             for (system_libs_values) |lib_info| {
                 const lib_as_needed = !lib_info.needed;
                 switch ((@as(u2, @intFromBool(lib_as_needed)) << 1) | @intFromBool(as_needed)) {
                     0b00, 0b11 => {},
                     0b01 => {
                         argv.appendAssumeCapacity("--no-as-needed");
                         as_needed = false;
                     },
                     0b10 => {
                         argv.appendAssumeCapacity("--as-needed");
                         as_needed = true;
                     },
                 }
 
                 // By this time, we depend on these libs being dynamically linked
                 // libraries and not static libraries (the check for that needs to be earlier),
                 // but they could be full paths to .so files, in which case we
                 // want to avoid prepending "-l".
                 argv.appendAssumeCapacity(lib_info.path.?);
             }
 
             if (!as_needed) {
                 argv.appendAssumeCapacity("--as-needed");
                 as_needed = true;
             }
 
             // libc++ dep
             if (comp.config.link_libcpp) {
                 try argv.append(comp.libcxxabi_static_lib.?.full_object_path);
                 try argv.append(comp.libcxx_static_lib.?.full_object_path);
             }
 
             // libunwind dep
             if (comp.config.link_libunwind) {
                 try argv.append(comp.libunwind_static_lib.?.full_object_path);
             }
 
             // libc dep
             comp.link_error_flags.missing_libc = false;
             if (comp.config.link_libc) {
                 if (comp.libc_installation != null) {
                     const needs_grouping = link_mode == .static;
                     if (needs_grouping) try argv.append("--start-group");
                     try argv.appendSlice(target_util.libcFullLinkFlags(target));
                     if (needs_grouping) try argv.append("--end-group");
                 } else if (target.isGnuLibC()) {
                     for (glibc.libs) |lib| {
                         if (lib.removed_in) |rem_in| {
                             if (target.os.version_range.linux.glibc.order(rem_in) != .lt) continue;
                         }
 
                         const lib_path = try std.fmt.allocPrint(arena, "{s}{c}lib{s}.so.{d}", .{
                             comp.glibc_so_files.?.dir_path, fs.path.sep, lib.name, lib.sover,
                         });
                         try argv.append(lib_path);
                     }
                     try argv.append(try comp.get_libc_crt_file(arena, "libc_nonshared.a"));
                 } else if (target.isMusl()) {
                     try argv.append(try comp.get_libc_crt_file(arena, switch (link_mode) {
                         .static => "libc.a",
                         .dynamic => "libc.so",
                     }));
                 } else {
                     comp.link_error_flags.missing_libc = true;
                 }
             }
         }
 
         // compiler-rt. Since compiler_rt exports symbols like `memset`, it needs
         // to be after the shared libraries, so they are picked up from the shared
         // libraries, not libcompiler_rt.
         if (compiler_rt_path) |p| {
             try argv.append(p);
         }
 
         // crt postlude
         if (csu.crtend) |v| try argv.append(v);
         if (csu.crtn) |v| try argv.append(v);
 
         if (self.base.allow_shlib_undefined) {
             try argv.append("--allow-shlib-undefined");
         }
 
         switch (self.compress_debug_sections) {
             .none => {},
             .zlib => try argv.append("--compress-debug-sections=zlib"),
             .zstd => try argv.append("--compress-debug-sections=zstd"),
         }
 
         if (self.bind_global_refs_locally) {
             try argv.append("-Bsymbolic");
         }
 
         try link.spawnLld(comp, arena, argv.items);
     }
 
     if (!self.base.disable_lld_caching) {
         // Update the file with the digest. If it fails we can continue; it only
         // means that the next invocation will have an unnecessary cache miss.
         Cache.writeSmallFile(directory.handle, id_symlink_basename, &digest) catch |err| {
             log.warn("failed to save linking hash digest file: {s}", .{@errorName(err)});
         };
         // Again failure here only means an unnecessary cache miss.
         man.writeManifest() catch |err| {
             log.warn("failed to write cache manifest when linking: {s}", .{@errorName(err)});
         };
         // We hang on to this lock so that the output file path can be used without
         // other processes clobbering it.
         self.base.lock = man.toOwnedLock();
     }
 }
 
 pub fn writeShdrTable(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     const target_endian = self.getTarget().cpu.arch.endian();
     const foreign_endian = target_endian != builtin.cpu.arch.endian();
     const shsize: u64 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Shdr),
         .p64 => @sizeOf(elf.Elf64_Shdr),
     };
     const shalign: u16 = switch (self.ptr_width) {
         .p32 => @alignOf(elf.Elf32_Shdr),
         .p64 => @alignOf(elf.Elf64_Shdr),
     };
 
     const shoff = self.shdr_table_offset orelse 0;
     const needed_size = self.sections.items(.shdr).len * shsize;
 
     if (needed_size > self.allocatedSize(shoff)) {
         self.shdr_table_offset = null;
         self.shdr_table_offset = try self.findFreeSpace(needed_size, shalign);
     }
 
     log.debug("writing section headers from 0x{x} to 0x{x}", .{
         self.shdr_table_offset.?,
         self.shdr_table_offset.? + needed_size,
     });
 
     switch (self.ptr_width) {
         .p32 => {
             const buf = try gpa.alloc(elf.Elf32_Shdr, self.sections.items(.shdr).len);
             defer gpa.free(buf);
 
             for (buf, 0..) |*shdr, i| {
                 assert(self.sections.items(.shdr)[i].sh_offset != math.maxInt(u64));
                 shdr.* = shdrTo32(self.sections.items(.shdr)[i]);
                 if (foreign_endian) {
                     mem.byteSwapAllFields(elf.Elf32_Shdr, shdr);
                 }
             }
             try self.base.file.?.pwriteAll(mem.sliceAsBytes(buf), self.shdr_table_offset.?);
         },
         .p64 => {
             const buf = try gpa.alloc(elf.Elf64_Shdr, self.sections.items(.shdr).len);
             defer gpa.free(buf);
 
             for (buf, 0..) |*shdr, i| {
                 assert(self.sections.items(.shdr)[i].sh_offset != math.maxInt(u64));
                 shdr.* = self.sections.items(.shdr)[i];
                 if (foreign_endian) {
                     mem.byteSwapAllFields(elf.Elf64_Shdr, shdr);
                 }
             }
             try self.base.file.?.pwriteAll(mem.sliceAsBytes(buf), self.shdr_table_offset.?);
         },
     }
 }
 
 fn writePhdrTable(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     const target_endian = self.getTarget().cpu.arch.endian();
     const foreign_endian = target_endian != builtin.cpu.arch.endian();
     const phdr_table = &self.phdrs.items[self.phdr_table_index.?];
 
     log.debug("writing program headers from 0x{x} to 0x{x}", .{
         phdr_table.p_offset,
         phdr_table.p_offset + phdr_table.p_filesz,
     });
 
     switch (self.ptr_width) {
         .p32 => {
             const buf = try gpa.alloc(elf.Elf32_Phdr, self.phdrs.items.len);
             defer gpa.free(buf);
 
             for (buf, 0..) |*phdr, i| {
                 phdr.* = phdrTo32(self.phdrs.items[i]);
                 if (foreign_endian) {
                     mem.byteSwapAllFields(elf.Elf32_Phdr, phdr);
                 }
             }
             try self.base.file.?.pwriteAll(mem.sliceAsBytes(buf), phdr_table.p_offset);
         },
         .p64 => {
             const buf = try gpa.alloc(elf.Elf64_Phdr, self.phdrs.items.len);
             defer gpa.free(buf);
 
             for (buf, 0..) |*phdr, i| {
                 phdr.* = self.phdrs.items[i];
                 if (foreign_endian) {
                     mem.byteSwapAllFields(elf.Elf64_Phdr, phdr);
                 }
             }
             try self.base.file.?.pwriteAll(mem.sliceAsBytes(buf), phdr_table.p_offset);
         },
     }
 }
 
 pub fn writeElfHeader(self: *Elf) !void {
     if (self.base.hasErrors()) return; // We had errors, so skip flushing to render the output unusable
 
     const comp = self.base.comp;
     var hdr_buf: [@sizeOf(elf.Elf64_Ehdr)]u8 = undefined;
 
     var index: usize = 0;
     hdr_buf[0..4].* = elf.MAGIC.*;
     index += 4;
 
     hdr_buf[index] = switch (self.ptr_width) {
         .p32 => elf.ELFCLASS32,
         .p64 => elf.ELFCLASS64,
     };
     index += 1;
 
     const target = self.getTarget();
     const endian = target.cpu.arch.endian();
     hdr_buf[index] = switch (endian) {
         .little => elf.ELFDATA2LSB,
         .big => elf.ELFDATA2MSB,
     };
     index += 1;
 
     hdr_buf[index] = 1; // ELF version
     index += 1;
 
     hdr_buf[index] = @intFromEnum(@as(elf.OSABI, switch (target.cpu.arch) {
         .amdgcn => switch (target.os.tag) {
             .amdhsa => .AMDGPU_HSA,
             .amdpal => .AMDGPU_PAL,
             .mesa3d => .AMDGPU_MESA3D,
             else => .NONE,
         },
         .msp430 => .STANDALONE,
         else => switch (target.os.tag) {
             .freebsd, .ps4 => .FREEBSD,
             .hermit => .STANDALONE,
             .illumos, .solaris => .SOLARIS,
             .openbsd => .OPENBSD,
             else => .NONE,
         },
     }));
     index += 1;
 
     // ABI Version, possibly used by glibc but not by static executables
     // padding
     @memset(hdr_buf[index..][0..8], 0);
     index += 8;
 
     assert(index == 16);
 
     const output_mode = comp.config.output_mode;
     const link_mode = comp.config.link_mode;
     const elf_type: elf.ET = switch (output_mode) {
         .Exe => if (comp.config.pie or target.os.tag == .haiku) .DYN else .EXEC,
         .Obj => .REL,
         .Lib => switch (link_mode) {
             .static => @as(elf.ET, .REL),
             .dynamic => .DYN,
         },
     };
     mem.writeInt(u16, hdr_buf[index..][0..2], @intFromEnum(elf_type), endian);
     index += 2;
 
     const machine = target.toElfMachine();
     mem.writeInt(u16, hdr_buf[index..][0..2], @intFromEnum(machine), endian);
     index += 2;
 
     // ELF Version, again
     mem.writeInt(u32, hdr_buf[index..][0..4], 1, endian);
     index += 4;
 
     const e_entry: u64 = if (self.linkerDefinedPtr()) |obj| blk: {
         const entry_sym = obj.entrySymbol(self) orelse break :blk 0;
         break :blk @intCast(entry_sym.address(.{}, self));
     } else 0;
     const phdr_table_offset = if (self.phdr_table_index) |phndx| self.phdrs.items[phndx].p_offset else 0;
     switch (self.ptr_width) {
         .p32 => {
             mem.writeInt(u32, hdr_buf[index..][0..4], @as(u32, @intCast(e_entry)), endian);
             index += 4;
 
             // e_phoff
             mem.writeInt(u32, hdr_buf[index..][0..4], @as(u32, @intCast(phdr_table_offset)), endian);
             index += 4;
 
             // e_shoff
             mem.writeInt(u32, hdr_buf[index..][0..4], @as(u32, @intCast(self.shdr_table_offset.?)), endian);
             index += 4;
         },
         .p64 => {
             // e_entry
             mem.writeInt(u64, hdr_buf[index..][0..8], e_entry, endian);
             index += 8;
 
             // e_phoff
             mem.writeInt(u64, hdr_buf[index..][0..8], phdr_table_offset, endian);
             index += 8;
 
             // e_shoff
             mem.writeInt(u64, hdr_buf[index..][0..8], self.shdr_table_offset.?, endian);
             index += 8;
         },
     }
 
     const e_flags = 0;
     mem.writeInt(u32, hdr_buf[index..][0..4], e_flags, endian);
     index += 4;
 
     const e_ehsize: u16 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Ehdr),
         .p64 => @sizeOf(elf.Elf64_Ehdr),
     };
     mem.writeInt(u16, hdr_buf[index..][0..2], e_ehsize, endian);
     index += 2;
 
     const e_phentsize: u16 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Phdr),
         .p64 => @sizeOf(elf.Elf64_Phdr),
     };
     mem.writeInt(u16, hdr_buf[index..][0..2], e_phentsize, endian);
     index += 2;
 
     const e_phnum = @as(u16, @intCast(self.phdrs.items.len));
     mem.writeInt(u16, hdr_buf[index..][0..2], e_phnum, endian);
     index += 2;
 
     const e_shentsize: u16 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Shdr),
         .p64 => @sizeOf(elf.Elf64_Shdr),
     };
     mem.writeInt(u16, hdr_buf[index..][0..2], e_shentsize, endian);
     index += 2;
 
     const e_shnum = @as(u16, @intCast(self.sections.items(.shdr).len));
     mem.writeInt(u16, hdr_buf[index..][0..2], e_shnum, endian);
     index += 2;
 
     mem.writeInt(u16, hdr_buf[index..][0..2], @intCast(self.shstrtab_section_index.?), endian);
     index += 2;
 
     assert(index == e_ehsize);
 
     try self.base.file.?.pwriteAll(hdr_buf[0..index], 0);
 }
 
 pub fn freeNav(self: *Elf, nav: InternPool.Nav.Index) void {
     if (self.llvm_object) |llvm_object| return llvm_object.freeNav(nav);
     return self.zigObjectPtr().?.freeNav(self, nav);
 }
 
 pub fn updateFunc(self: *Elf, pt: Zcu.PerThread, func_index: InternPool.Index, air: Air, liveness: Liveness) !void {
     if (build_options.skip_non_native and builtin.object_format != .elf) {
         @panic("Attempted to compile for object format that was disabled by build configuration");
     }
     if (self.llvm_object) |llvm_object| return llvm_object.updateFunc(pt, func_index, air, liveness);
     return self.zigObjectPtr().?.updateFunc(self, pt, func_index, air, liveness);
 }
 
 pub fn updateNav(
     self: *Elf,
     pt: Zcu.PerThread,
     nav: InternPool.Nav.Index,
 ) link.File.UpdateNavError!void {
     if (build_options.skip_non_native and builtin.object_format != .elf) {
         @panic("Attempted to compile for object format that was disabled by build configuration");
     }
     if (self.llvm_object) |llvm_object| return llvm_object.updateNav(pt, nav);
     return self.zigObjectPtr().?.updateNav(self, pt, nav);
 }
 
 pub fn updateContainerType(
     self: *Elf,
     pt: Zcu.PerThread,
     ty: InternPool.Index,
 ) link.File.UpdateNavError!void {
     if (build_options.skip_non_native and builtin.object_format != .elf) {
         @panic("Attempted to compile for object format that was disabled by build configuration");
     }
     if (self.llvm_object) |_| return;
     return self.zigObjectPtr().?.updateContainerType(pt, ty);
 }
 
 pub fn updateExports(
     self: *Elf,
     pt: Zcu.PerThread,
     exported: Zcu.Exported,
     export_indices: []const u32,
 ) link.File.UpdateExportsError!void {
     if (build_options.skip_non_native and builtin.object_format != .elf) {
         @panic("Attempted to compile for object format that was disabled by build configuration");
     }
     if (self.llvm_object) |llvm_object| return llvm_object.updateExports(pt, exported, export_indices);
     return self.zigObjectPtr().?.updateExports(self, pt, exported, export_indices);
 }
 
 pub fn updateNavLineNumber(self: *Elf, pt: Zcu.PerThread, nav: InternPool.Nav.Index) !void {
     if (self.llvm_object) |_| return;
     return self.zigObjectPtr().?.updateNavLineNumber(pt, nav);
 }
 
 pub fn deleteExport(
     self: *Elf,
     exported: Zcu.Exported,
     name: InternPool.NullTerminatedString,
 ) void {
     if (self.llvm_object) |_| return;
     return self.zigObjectPtr().?.deleteExport(self, exported, name);
 }
 
 fn checkDuplicates(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
 
     var dupes = std.AutoArrayHashMap(SymbolResolver.Index, std.ArrayListUnmanaged(File.Index)).init(gpa);
     defer {
         for (dupes.values()) |*list| {
             list.deinit(gpa);
         }
         dupes.deinit();
     }
 
     if (self.zigObjectPtr()) |zig_object| {
         try zig_object.checkDuplicates(&dupes, self);
     }
     for (self.objects.items) |index| {
         try self.file(index).?.object.checkDuplicates(&dupes, self);
     }
 
     try self.reportDuplicates(dupes);
 }
 
 pub fn addCommentString(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     if (self.comment_merge_section_index != null) return;
     const msec_index = try self.getOrCreateMergeSection(".comment", elf.SHF_MERGE | elf.SHF_STRINGS, elf.SHT_PROGBITS);
     const msec = self.mergeSection(msec_index);
     const res = try msec.insertZ(gpa, "zig " ++ builtin.zig_version_string);
     if (res.found_existing) return;
     const msub_index = try msec.addMergeSubsection(gpa);
     const msub = msec.mergeSubsection(msub_index);
     msub.merge_section_index = msec_index;
     msub.string_index = res.key.pos;
     msub.alignment = .@"1";
     msub.size = res.key.len;
     msub.entsize = 1;
     msub.alive = true;
     res.sub.* = msub_index;
     self.comment_merge_section_index = msec_index;
 }
 
 pub fn resolveMergeSections(self: *Elf) !void {
     const tracy = trace(@src());
     defer tracy.end();
 
     var has_errors = false;
     for (self.objects.items) |index| {
         const object = self.file(index).?.object;
         if (!object.alive) continue;
         if (!object.dirty) continue;
         object.initInputMergeSections(self) catch |err| switch (err) {
             error.LinkFailure => has_errors = true,
             else => |e| return e,
         };
     }
 
     if (has_errors) return error.FlushFailure;
 
     for (self.objects.items) |index| {
         const object = self.file(index).?.object;
         if (!object.alive) continue;
         if (!object.dirty) continue;
         try object.initOutputMergeSections(self);
     }
 
     for (self.objects.items) |index| {
         const object = self.file(index).?.object;
         if (!object.alive) continue;
         if (!object.dirty) continue;
         object.resolveMergeSubsections(self) catch |err| switch (err) {
             error.LinkFailure => has_errors = true,
             else => |e| return e,
         };
     }
 
     if (has_errors) return error.LinkFailure;
 }
 
 pub fn finalizeMergeSections(self: *Elf) !void {
     for (self.merge_sections.items) |*msec| {
         try msec.finalize(self.base.comp.gpa);
     }
 }
 
 pub fn updateMergeSectionSizes(self: *Elf) !void {
     for (self.merge_sections.items) |*msec| {
         msec.updateSize();
     }
     for (self.merge_sections.items) |*msec| {
         const shdr = &self.sections.items(.shdr)[msec.output_section_index];
         const offset = msec.alignment.forward(shdr.sh_size);
         const padding = offset - shdr.sh_size;
         msec.value = @intCast(offset);
         shdr.sh_size += padding + msec.size;
         shdr.sh_addralign = @max(shdr.sh_addralign, msec.alignment.toByteUnits() orelse 1);
         shdr.sh_entsize = if (shdr.sh_entsize == 0) msec.entsize else @min(shdr.sh_entsize, msec.entsize);
     }
 }
 
 pub fn writeMergeSections(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     var buffer = std.ArrayList(u8).init(gpa);
     defer buffer.deinit();
 
     for (self.merge_sections.items) |*msec| {
         const shdr = self.sections.items(.shdr)[msec.output_section_index];
         const fileoff = math.cast(usize, msec.value + shdr.sh_offset) orelse return error.Overflow;
         const size = math.cast(usize, msec.size) orelse return error.Overflow;
         try buffer.ensureTotalCapacity(size);
         buffer.appendNTimesAssumeCapacity(0, size);
 
         for (msec.finalized_subsections.items) |msub_index| {
             const msub = msec.mergeSubsection(msub_index);
             assert(msub.alive);
             const string = msub.getString(self);
             const off = math.cast(usize, msub.value) orelse return error.Overflow;
             @memcpy(buffer.items[off..][0..string.len], string);
         }
 
         try self.base.file.?.pwriteAll(buffer.items, fileoff);
         buffer.clearRetainingCapacity();
     }
 }
 
 fn initOutputSections(self: *Elf) !void {
     for (self.objects.items) |index| {
         try self.file(index).?.object.initOutputSections(self);
     }
     for (self.merge_sections.items) |*msec| {
         if (msec.finalized_subsections.items.len == 0) continue;
         try msec.initOutputSection(self);
     }
 }
 
 fn initSyntheticSections(self: *Elf) !void {
     const comp = self.base.comp;
     const target = self.getTarget();
     const ptr_size = self.ptrWidthBytes();
 
     const needs_eh_frame = blk: {
         if (self.zigObjectPtr()) |zo|
             if (zo.eh_frame_index != null) break :blk true;
         break :blk for (self.objects.items) |index| {
             if (self.file(index).?.object.cies.items.len > 0) break true;
         } else false;
     };
     if (needs_eh_frame) {
         if (self.eh_frame_section_index == null) {
             self.eh_frame_section_index = self.sectionByName(".eh_frame") orelse try self.addSection(.{
                 .name = try self.insertShString(".eh_frame"),
                 .type = if (target.cpu.arch == .x86_64)
                     elf.SHT_X86_64_UNWIND
                 else
                     elf.SHT_PROGBITS,
                 .flags = elf.SHF_ALLOC,
                 .addralign = ptr_size,
                 .offset = std.math.maxInt(u64),
             });
         }
         if (comp.link_eh_frame_hdr and self.eh_frame_hdr_section_index == null) {
             self.eh_frame_hdr_section_index = try self.addSection(.{
                 .name = try self.insertShString(".eh_frame_hdr"),
                 .type = elf.SHT_PROGBITS,
                 .flags = elf.SHF_ALLOC,
                 .addralign = 4,
                 .offset = std.math.maxInt(u64),
             });
         }
     }
 
     if (self.got.entries.items.len > 0 and self.got_section_index == null) {
         self.got_section_index = try self.addSection(.{
             .name = try self.insertShString(".got"),
             .type = elf.SHT_PROGBITS,
             .flags = elf.SHF_ALLOC | elf.SHF_WRITE,
             .addralign = ptr_size,
             .offset = std.math.maxInt(u64),
         });
     }
 
     if (self.got_plt_section_index == null) {
         self.got_plt_section_index = try self.addSection(.{
             .name = try self.insertShString(".got.plt"),
             .type = elf.SHT_PROGBITS,
             .flags = elf.SHF_ALLOC | elf.SHF_WRITE,
             .addralign = @alignOf(u64),
             .offset = std.math.maxInt(u64),
         });
     }
 
     const needs_rela_dyn = blk: {
         if (self.got.flags.needs_rela or self.got.flags.needs_tlsld or self.copy_rel.symbols.items.len > 0)
             break :blk true;
         if (self.zigObjectPtr()) |zig_object| {
             if (zig_object.num_dynrelocs > 0) break :blk true;
         }
         for (self.objects.items) |index| {
             if (self.file(index).?.object.num_dynrelocs > 0) break :blk true;
         }
         break :blk false;
     };
     if (needs_rela_dyn and self.rela_dyn_section_index == null) {
         self.rela_dyn_section_index = try self.addSection(.{
             .name = try self.insertShString(".rela.dyn"),
             .type = elf.SHT_RELA,
             .flags = elf.SHF_ALLOC,
             .addralign = @alignOf(elf.Elf64_Rela),
             .entsize = @sizeOf(elf.Elf64_Rela),
             .offset = std.math.maxInt(u64),
         });
     }
 
     if (self.plt.symbols.items.len > 0) {
         if (self.plt_section_index == null) {
             self.plt_section_index = try self.addSection(.{
                 .name = try self.insertShString(".plt"),
                 .type = elf.SHT_PROGBITS,
                 .flags = elf.SHF_ALLOC | elf.SHF_EXECINSTR,
                 .addralign = 16,
                 .offset = std.math.maxInt(u64),
             });
         }
         if (self.rela_plt_section_index == null) {
             self.rela_plt_section_index = try self.addSection(.{
                 .name = try self.insertShString(".rela.plt"),
                 .type = elf.SHT_RELA,
                 .flags = elf.SHF_ALLOC,
                 .addralign = @alignOf(elf.Elf64_Rela),
                 .entsize = @sizeOf(elf.Elf64_Rela),
                 .offset = std.math.maxInt(u64),
             });
         }
     }
 
     if (self.plt_got.symbols.items.len > 0 and self.plt_got_section_index == null) {
         self.plt_got_section_index = try self.addSection(.{
             .name = try self.insertShString(".plt.got"),
             .type = elf.SHT_PROGBITS,
             .flags = elf.SHF_ALLOC | elf.SHF_EXECINSTR,
             .addralign = 16,
             .offset = std.math.maxInt(u64),
         });
     }
 
     if (self.copy_rel.symbols.items.len > 0 and self.copy_rel_section_index == null) {
         self.copy_rel_section_index = try self.addSection(.{
             .name = try self.insertShString(".copyrel"),
             .type = elf.SHT_NOBITS,
             .flags = elf.SHF_ALLOC | elf.SHF_WRITE,
             .offset = std.math.maxInt(u64),
         });
     }
 
     const needs_interp = blk: {
         // On Ubuntu with musl-gcc, we get a weird combo of options looking like this:
         // -dynamic-linker=<path> -static
         // In this case, if we do generate .interp section and segment, we will get
         // a segfault in the dynamic linker trying to load a binary that is static
         // and doesn't contain .dynamic section.
         if (self.base.isStatic() and !comp.config.pie) break :blk false;
         break :blk target.dynamic_linker.get() != null;
     };
     if (needs_interp and self.interp_section_index == null) {
         self.interp_section_index = try self.addSection(.{
             .name = try self.insertShString(".interp"),
             .type = elf.SHT_PROGBITS,
             .flags = elf.SHF_ALLOC,
             .addralign = 1,
             .offset = std.math.maxInt(u64),
         });
     }
 
     if (self.isEffectivelyDynLib() or self.shared_objects.items.len > 0 or comp.config.pie) {
         if (self.dynstrtab_section_index == null) {
             self.dynstrtab_section_index = try self.addSection(.{
                 .name = try self.insertShString(".dynstr"),
                 .flags = elf.SHF_ALLOC,
                 .type = elf.SHT_STRTAB,
                 .entsize = 1,
                 .addralign = 1,
                 .offset = std.math.maxInt(u64),
             });
         }
         if (self.dynamic_section_index == null) {
             self.dynamic_section_index = try self.addSection(.{
                 .name = try self.insertShString(".dynamic"),
                 .flags = elf.SHF_ALLOC | elf.SHF_WRITE,
                 .type = elf.SHT_DYNAMIC,
                 .entsize = @sizeOf(elf.Elf64_Dyn),
                 .addralign = @alignOf(elf.Elf64_Dyn),
                 .offset = std.math.maxInt(u64),
             });
         }
         if (self.dynsymtab_section_index == null) {
             self.dynsymtab_section_index = try self.addSection(.{
                 .name = try self.insertShString(".dynsym"),
                 .flags = elf.SHF_ALLOC,
                 .type = elf.SHT_DYNSYM,
                 .addralign = @alignOf(elf.Elf64_Sym),
                 .entsize = @sizeOf(elf.Elf64_Sym),
                 .info = 1,
                 .offset = std.math.maxInt(u64),
             });
         }
         if (self.hash_section_index == null) {
             self.hash_section_index = try self.addSection(.{
                 .name = try self.insertShString(".hash"),
                 .flags = elf.SHF_ALLOC,
                 .type = elf.SHT_HASH,
                 .addralign = 4,
                 .entsize = 4,
                 .offset = std.math.maxInt(u64),
             });
         }
         if (self.gnu_hash_section_index == null) {
             self.gnu_hash_section_index = try self.addSection(.{
                 .name = try self.insertShString(".gnu.hash"),
                 .flags = elf.SHF_ALLOC,
                 .type = elf.SHT_GNU_HASH,
                 .addralign = 8,
                 .offset = std.math.maxInt(u64),
             });
         }
 
         const needs_versions = for (self.dynsym.entries.items) |entry| {
             const sym = self.symbol(entry.ref).?;
             if (sym.flags.import and sym.version_index & elf.VERSYM_VERSION > elf.VER_NDX_GLOBAL) break true;
         } else false;
         if (needs_versions) {
             if (self.versym_section_index == null) {
                 self.versym_section_index = try self.addSection(.{
                     .name = try self.insertShString(".gnu.version"),
                     .flags = elf.SHF_ALLOC,
                     .type = elf.SHT_GNU_VERSYM,
                     .addralign = @alignOf(elf.Elf64_Versym),
                     .entsize = @sizeOf(elf.Elf64_Versym),
                     .offset = std.math.maxInt(u64),
                 });
             }
             if (self.verneed_section_index == null) {
                 self.verneed_section_index = try self.addSection(.{
                     .name = try self.insertShString(".gnu.version_r"),
                     .flags = elf.SHF_ALLOC,
                     .type = elf.SHT_GNU_VERNEED,
                     .addralign = @alignOf(elf.Elf64_Verneed),
                     .offset = std.math.maxInt(u64),
                 });
             }
         }
     }
 
     try self.initSymtab();
     try self.initShStrtab();
 }
 
 pub fn initSymtab(self: *Elf) !void {
     const small_ptr = switch (self.ptr_width) {
         .p32 => true,
         .p64 => false,
     };
     if (self.symtab_section_index == null) {
         self.symtab_section_index = try self.addSection(.{
             .name = try self.insertShString(".symtab"),
             .type = elf.SHT_SYMTAB,
             .addralign = if (small_ptr) @alignOf(elf.Elf32_Sym) else @alignOf(elf.Elf64_Sym),
             .entsize = if (small_ptr) @sizeOf(elf.Elf32_Sym) else @sizeOf(elf.Elf64_Sym),
             .offset = std.math.maxInt(u64),
         });
     }
     if (self.strtab_section_index == null) {
         self.strtab_section_index = try self.addSection(.{
             .name = try self.insertShString(".strtab"),
             .type = elf.SHT_STRTAB,
             .entsize = 1,
             .addralign = 1,
             .offset = std.math.maxInt(u64),
         });
     }
 }
 
 pub fn initShStrtab(self: *Elf) !void {
     if (self.shstrtab_section_index == null) {
         self.shstrtab_section_index = try self.addSection(.{
             .name = try self.insertShString(".shstrtab"),
             .type = elf.SHT_STRTAB,
             .entsize = 1,
             .addralign = 1,
             .offset = std.math.maxInt(u64),
         });
     }
 }
 
 fn initSpecialPhdrs(self: *Elf) !void {
     comptime assert(max_number_of_special_phdrs == 5);
 
     if (self.interp_section_index != null and self.phdr_interp_index == null) {
         self.phdr_interp_index = try self.addPhdr(.{
             .type = elf.PT_INTERP,
             .flags = elf.PF_R,
             .@"align" = 1,
         });
     }
     if (self.dynamic_section_index != null and self.phdr_dynamic_index == null) {
         self.phdr_dynamic_index = try self.addPhdr(.{
             .type = elf.PT_DYNAMIC,
             .flags = elf.PF_R | elf.PF_W,
         });
     }
     if (self.eh_frame_hdr_section_index != null and self.phdr_gnu_eh_frame_index == null) {
         self.phdr_gnu_eh_frame_index = try self.addPhdr(.{
             .type = elf.PT_GNU_EH_FRAME,
             .flags = elf.PF_R,
         });
     }
     if (self.phdr_gnu_stack_index == null) {
         self.phdr_gnu_stack_index = try self.addPhdr(.{
             .type = elf.PT_GNU_STACK,
             .flags = elf.PF_W | elf.PF_R,
             .memsz = self.base.stack_size,
             .@"align" = 1,
         });
     }
 
     const has_tls = for (self.sections.items(.shdr)) |shdr| {
         if (shdr.sh_flags & elf.SHF_TLS != 0) break true;
     } else false;
     if (has_tls and self.phdr_tls_index == null) {
         self.phdr_tls_index = try self.addPhdr(.{
             .type = elf.PT_TLS,
             .flags = elf.PF_R,
             .@"align" = 1,
         });
     }
 }
 
 /// We need to sort constructors/destuctors in the following sections:
 /// * .init_array
 /// * .fini_array
 /// * .preinit_array
 /// * .ctors
 /// * .dtors
 /// The prority of inclusion is defined as part of the input section's name. For example, .init_array.10000.
 /// If no priority value has been specified,
 /// * for .init_array, .fini_array and .preinit_array, we automatically assign that section max value of maxInt(i32)
 ///   and push it to the back of the queue,
 /// * for .ctors and .dtors, we automatically assign that section min value of -1
 ///   and push it to the front of the queue,
 /// crtbegin and ctrend are assigned minInt(i32) and maxInt(i32) respectively.
 /// Ties are broken by the file prority which corresponds to the inclusion of input sections in this output section
 /// we are about to sort.
 fn sortInitFini(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     const slice = self.sections.slice();
 
     const Entry = struct {
         priority: i32,
         atom_ref: Ref,
 
         pub fn lessThan(ctx: *Elf, lhs: @This(), rhs: @This()) bool {
             if (lhs.priority == rhs.priority) {
                 return ctx.atom(lhs.atom_ref).?.priority(ctx) < ctx.atom(rhs.atom_ref).?.priority(ctx);
             }
             return lhs.priority < rhs.priority;
         }
     };
 
     for (slice.items(.shdr), slice.items(.atom_list_2)) |shdr, *atom_list| {
         if (shdr.sh_flags & elf.SHF_ALLOC == 0) continue;
         if (atom_list.atoms.keys().len == 0) continue;
 
         var is_init_fini = false;
         var is_ctor_dtor = false;
         switch (shdr.sh_type) {
             elf.SHT_PREINIT_ARRAY,
             elf.SHT_INIT_ARRAY,
             elf.SHT_FINI_ARRAY,
             => is_init_fini = true,
             else => {
                 const name = self.getShString(shdr.sh_name);
                 is_ctor_dtor = mem.indexOf(u8, name, ".ctors") != null or mem.indexOf(u8, name, ".dtors") != null;
             },
         }
         if (!is_init_fini and !is_ctor_dtor) continue;
 
         var entries = std.ArrayList(Entry).init(gpa);
         try entries.ensureTotalCapacityPrecise(atom_list.atoms.keys().len);
         defer entries.deinit();
 
         for (atom_list.atoms.keys()) |ref| {
             const atom_ptr = self.atom(ref).?;
             const object = atom_ptr.file(self).?.object;
             const priority = blk: {
                 if (is_ctor_dtor) {
                     if (mem.indexOf(u8, object.path, "crtbegin") != null) break :blk std.math.minInt(i32);
                     if (mem.indexOf(u8, object.path, "crtend") != null) break :blk std.math.maxInt(i32);
                 }
                 const default: i32 = if (is_ctor_dtor) -1 else std.math.maxInt(i32);
                 const name = atom_ptr.name(self);
                 var it = mem.splitBackwardsScalar(u8, name, '.');
                 const priority = std.fmt.parseUnsigned(u16, it.first(), 10) catch default;
                 break :blk priority;
             };
             entries.appendAssumeCapacity(.{ .priority = priority, .atom_ref = ref });
         }
 
         mem.sort(Entry, entries.items, self, Entry.lessThan);
 
         atom_list.atoms.clearRetainingCapacity();
         for (entries.items) |entry| {
             _ = atom_list.atoms.getOrPutAssumeCapacity(entry.atom_ref);
         }
     }
 }
 
 fn setDynamicSection(self: *Elf, rpaths: []const []const u8) !void {
     if (self.dynamic_section_index == null) return;
 
     for (self.shared_objects.items) |index| {
         const shared_object = self.file(index).?.shared_object;
         if (!shared_object.alive) continue;
         try self.dynamic.addNeeded(shared_object, self);
     }
 
     if (self.isEffectivelyDynLib()) {
         if (self.soname) |soname| {
             try self.dynamic.setSoname(soname, self);
         }
     }
 
     try self.dynamic.setRpath(rpaths, self);
 }
 
 fn sortDynamicSymtab(self: *Elf) void {
     if (self.gnu_hash_section_index == null) return;
     self.dynsym.sort(self);
 }
 
 fn setVersionSymtab(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     if (self.versym_section_index == null) return;
     try self.versym.resize(gpa, self.dynsym.count());
     self.versym.items[0] = elf.VER_NDX_LOCAL;
     for (self.dynsym.entries.items, 1..) |entry, i| {
         const sym = self.symbol(entry.ref).?;
         self.versym.items[i] = sym.version_index;
     }
 
     if (self.verneed_section_index) |shndx| {
         try self.verneed.generate(self);
         const shdr = &self.sections.items(.shdr)[shndx];
         shdr.sh_info = @as(u32, @intCast(self.verneed.verneed.items.len));
     }
 }
 
 fn setHashSections(self: *Elf) !void {
     if (self.hash_section_index != null) {
         try self.hash.generate(self);
     }
     if (self.gnu_hash_section_index != null) {
         try self.gnu_hash.calcSize(self);
     }
 }
 
 fn phdrRank(phdr: elf.Elf64_Phdr) u8 {
     switch (phdr.p_type) {
         elf.PT_NULL => return 0,
         elf.PT_PHDR => return 1,
         elf.PT_INTERP => return 2,
         elf.PT_LOAD => return 3,
         elf.PT_DYNAMIC, elf.PT_TLS => return 4,
         elf.PT_GNU_EH_FRAME => return 5,
         elf.PT_GNU_STACK => return 6,
         else => return 7,
     }
 }
 
 fn sortPhdrs(self: *Elf) error{OutOfMemory}!void {
     const Entry = struct {
         phndx: u16,
 
         pub fn lessThan(elf_file: *Elf, lhs: @This(), rhs: @This()) bool {
             const lhs_phdr = elf_file.phdrs.items[lhs.phndx];
             const rhs_phdr = elf_file.phdrs.items[rhs.phndx];
             const lhs_rank = phdrRank(lhs_phdr);
             const rhs_rank = phdrRank(rhs_phdr);
             if (lhs_rank == rhs_rank) return lhs_phdr.p_vaddr < rhs_phdr.p_vaddr;
             return lhs_rank < rhs_rank;
         }
     };
 
     const gpa = self.base.comp.gpa;
     var entries = try std.ArrayList(Entry).initCapacity(gpa, self.phdrs.items.len);
     defer entries.deinit();
     for (0..self.phdrs.items.len) |phndx| {
         entries.appendAssumeCapacity(.{ .phndx = @as(u16, @intCast(phndx)) });
     }
 
     mem.sort(Entry, entries.items, self, Entry.lessThan);
 
     const backlinks = try gpa.alloc(u16, entries.items.len);
     defer gpa.free(backlinks);
     for (entries.items, 0..) |entry, i| {
         backlinks[entry.phndx] = @as(u16, @intCast(i));
     }
 
     const slice = try self.phdrs.toOwnedSlice(gpa);
     defer gpa.free(slice);
 
     try self.phdrs.ensureTotalCapacityPrecise(gpa, slice.len);
     for (entries.items) |sorted| {
         self.phdrs.appendAssumeCapacity(slice[sorted.phndx]);
     }
 
     for (&[_]*?u16{
         &self.phdr_table_index,
         &self.phdr_table_load_index,
         &self.phdr_interp_index,
         &self.phdr_dynamic_index,
         &self.phdr_gnu_eh_frame_index,
         &self.phdr_tls_index,
     }) |maybe_index| {
         if (maybe_index.*) |*index| {
             index.* = backlinks[index.*];
         }
     }
 
     for (self.sections.items(.phndx)) |*maybe_phndx| {
         if (maybe_phndx.*) |*index| {
             index.* = backlinks[index.*];
         }
     }
 }
 
 fn shdrRank(self: *Elf, shndx: u32) u8 {
     const shdr = self.sections.items(.shdr)[shndx];
     const name = self.getShString(shdr.sh_name);
     const flags = shdr.sh_flags;
 
     switch (shdr.sh_type) {
         elf.SHT_NULL => return 0,
         elf.SHT_DYNSYM => return 2,
         elf.SHT_HASH => return 3,
         elf.SHT_GNU_HASH => return 3,
         elf.SHT_GNU_VERSYM => return 4,
         elf.SHT_GNU_VERDEF => return 4,
         elf.SHT_GNU_VERNEED => return 4,
 
         elf.SHT_PREINIT_ARRAY,
         elf.SHT_INIT_ARRAY,
         elf.SHT_FINI_ARRAY,
         => return 0xf1,
 
         elf.SHT_DYNAMIC => return 0xf2,
 
         elf.SHT_RELA, elf.SHT_GROUP => return 0xf,
 
         elf.SHT_PROGBITS => if (flags & elf.SHF_ALLOC != 0) {
             if (flags & elf.SHF_EXECINSTR != 0) {
                 return 0xf0;
             } else if (flags & elf.SHF_WRITE != 0) {
                 return if (flags & elf.SHF_TLS != 0) 0xf3 else 0xf5;
             } else if (mem.eql(u8, name, ".interp")) {
                 return 1;
             } else if (mem.startsWith(u8, name, ".eh_frame")) {
                 return 0xe1;
             } else {
                 return 0xe0;
             }
         } else {
             if (mem.startsWith(u8, name, ".debug")) {
                 return 0xf7;
             } else {
                 return 0xf8;
             }
         },
         elf.SHT_X86_64_UNWIND => return 0xe1,
 
         elf.SHT_NOBITS => return if (flags & elf.SHF_TLS != 0) 0xf4 else 0xf6,
         elf.SHT_SYMTAB => return 0xf9,
         elf.SHT_STRTAB => return if (mem.eql(u8, name, ".dynstr")) 0x4 else 0xfa,
         else => return 0xff,
     }
 }
 
 pub fn sortShdrs(self: *Elf) !void {
     const Entry = struct {
         shndx: u32,
 
         pub fn lessThan(elf_file: *Elf, lhs: @This(), rhs: @This()) bool {
             return elf_file.shdrRank(lhs.shndx) < elf_file.shdrRank(rhs.shndx);
         }
     };
 
     const gpa = self.base.comp.gpa;
     var entries = try std.ArrayList(Entry).initCapacity(gpa, self.sections.items(.shdr).len);
     defer entries.deinit();
     for (0..self.sections.items(.shdr).len) |shndx| {
         entries.appendAssumeCapacity(.{ .shndx = @intCast(shndx) });
     }
 
     mem.sort(Entry, entries.items, self, Entry.lessThan);
 
     const backlinks = try gpa.alloc(u32, entries.items.len);
     defer gpa.free(backlinks);
     for (entries.items, 0..) |entry, i| {
         backlinks[entry.shndx] = @intCast(i);
     }
 
     var slice = self.sections.toOwnedSlice();
     defer slice.deinit(gpa);
 
     try self.sections.ensureTotalCapacity(gpa, slice.len);
     for (entries.items) |sorted| {
         self.sections.appendAssumeCapacity(slice.get(sorted.shndx));
     }
 
     self.resetShdrIndexes(backlinks);
 }
 
 fn resetShdrIndexes(self: *Elf, backlinks: []const u32) void {
     for (&[_]*?u32{
         &self.eh_frame_section_index,
         &self.eh_frame_rela_section_index,
         &self.eh_frame_hdr_section_index,
         &self.got_section_index,
         &self.symtab_section_index,
         &self.strtab_section_index,
         &self.shstrtab_section_index,
         &self.interp_section_index,
         &self.dynamic_section_index,
         &self.dynsymtab_section_index,
         &self.dynstrtab_section_index,
         &self.hash_section_index,
         &self.gnu_hash_section_index,
         &self.plt_section_index,
         &self.got_plt_section_index,
         &self.plt_got_section_index,
         &self.rela_dyn_section_index,
         &self.rela_plt_section_index,
         &self.copy_rel_section_index,
         &self.versym_section_index,
         &self.verneed_section_index,
     }) |maybe_index| {
         if (maybe_index.*) |*index| {
             index.* = backlinks[index.*];
         }
     }
 
     for (self.merge_sections.items) |*msec| {
         msec.output_section_index = backlinks[msec.output_section_index];
     }
 
     const slice = self.sections.slice();
     for (slice.items(.shdr), slice.items(.atom_list_2)) |*shdr, *atom_list| {
         atom_list.output_section_index = backlinks[atom_list.output_section_index];
         for (atom_list.atoms.keys()) |ref| {
             self.atom(ref).?.output_section_index = atom_list.output_section_index;
         }
         if (shdr.sh_type == elf.SHT_RELA) {
             // FIXME:JK we should spin up .symtab potentially earlier, or set all non-dynamic RELA sections
             // to point at symtab
             // shdr.sh_link = backlinks[shdr.sh_link];
             shdr.sh_link = self.symtab_section_index.?;
             shdr.sh_info = backlinks[shdr.sh_info];
         }
     }
 
     if (self.zigObjectPtr()) |zo| {
         for (zo.atoms_indexes.items) |atom_index| {
             const atom_ptr = zo.atom(atom_index) orelse continue;
             atom_ptr.output_section_index = backlinks[atom_ptr.output_section_index];
         }
     }
 
     for (self.comdat_group_sections.items) |*cg| {
         cg.shndx = backlinks[cg.shndx];
     }
 
     if (self.symtab_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.strtab_section_index.?;
     }
 
     if (self.dynamic_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynstrtab_section_index.?;
     }
 
     if (self.dynsymtab_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynstrtab_section_index.?;
     }
 
     if (self.hash_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynsymtab_section_index.?;
     }
 
     if (self.gnu_hash_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynsymtab_section_index.?;
     }
 
     if (self.versym_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynsymtab_section_index.?;
     }
 
     if (self.verneed_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynstrtab_section_index.?;
     }
 
     if (self.rela_dyn_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynsymtab_section_index orelse 0;
     }
 
     if (self.rela_plt_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.dynsymtab_section_index.?;
         shdr.sh_info = self.plt_section_index.?;
     }
 
     if (self.eh_frame_rela_section_index) |index| {
         const shdr = &slice.items(.shdr)[index];
         shdr.sh_link = self.symtab_section_index.?;
         shdr.sh_info = self.eh_frame_section_index.?;
     }
 }
 
 fn updateSectionSizes(self: *Elf) !void {
     const slice = self.sections.slice();
     for (slice.items(.shdr), slice.items(.atom_list_2)) |shdr, *atom_list| {
         if (atom_list.atoms.keys().len == 0) continue;
         if (!atom_list.dirty) continue;
         if (self.requiresThunks() and shdr.sh_flags & elf.SHF_EXECINSTR != 0) continue;
         atom_list.updateSize(self);
         try atom_list.allocate(self);
         atom_list.dirty = false;
     }
 
     if (self.requiresThunks()) {
         for (slice.items(.shdr), slice.items(.atom_list_2)) |shdr, *atom_list| {
             if (shdr.sh_flags & elf.SHF_EXECINSTR == 0) continue;
             if (atom_list.atoms.keys().len == 0) continue;
             if (!atom_list.dirty) continue;
 
             // Create jump/branch range extenders if needed.
             try self.createThunks(atom_list);
             try atom_list.allocate(self);
             atom_list.dirty = false;
         }
 
         // FIXME:JK this will hopefully not be needed once we create a link from Atom/Thunk to AtomList.
         for (self.thunks.items) |*th| {
             th.value += slice.items(.atom_list_2)[th.output_section_index].value;
         }
     }
 
     const shdrs = slice.items(.shdr);
     if (self.eh_frame_section_index) |index| {
         shdrs[index].sh_size = try eh_frame.calcEhFrameSize(self);
     }
 
     if (self.eh_frame_hdr_section_index) |index| {
         shdrs[index].sh_size = eh_frame.calcEhFrameHdrSize(self);
     }
 
     if (self.got_section_index) |index| {
         shdrs[index].sh_size = self.got.size(self);
     }
 
     if (self.plt_section_index) |index| {
         shdrs[index].sh_size = self.plt.size(self);
     }
 
     if (self.got_plt_section_index) |index| {
         shdrs[index].sh_size = self.got_plt.size(self);
     }
 
     if (self.plt_got_section_index) |index| {
         shdrs[index].sh_size = self.plt_got.size(self);
     }
 
     if (self.rela_dyn_section_index) |shndx| {
         var num = self.got.numRela(self) + self.copy_rel.numRela();
         if (self.zigObjectPtr()) |zig_object| {
             num += zig_object.num_dynrelocs;
         }
         for (self.objects.items) |index| {
             num += self.file(index).?.object.num_dynrelocs;
         }
         shdrs[shndx].sh_size = num * @sizeOf(elf.Elf64_Rela);
     }
 
     if (self.rela_plt_section_index) |index| {
         shdrs[index].sh_size = self.plt.numRela() * @sizeOf(elf.Elf64_Rela);
     }
 
     if (self.copy_rel_section_index) |index| {
         try self.copy_rel.updateSectionSize(index, self);
     }
 
     if (self.interp_section_index) |index| {
         shdrs[index].sh_size = self.getTarget().dynamic_linker.get().?.len + 1;
     }
 
     if (self.hash_section_index) |index| {
         shdrs[index].sh_size = self.hash.size();
     }
 
     if (self.gnu_hash_section_index) |index| {
         shdrs[index].sh_size = self.gnu_hash.size();
     }
 
     if (self.dynamic_section_index) |index| {
         shdrs[index].sh_size = self.dynamic.size(self);
     }
 
     if (self.dynsymtab_section_index) |index| {
         shdrs[index].sh_size = self.dynsym.size();
     }
 
     if (self.dynstrtab_section_index) |index| {
         shdrs[index].sh_size = self.dynstrtab.items.len;
     }
 
     if (self.versym_section_index) |index| {
         shdrs[index].sh_size = self.versym.items.len * @sizeOf(elf.Elf64_Versym);
     }
 
     if (self.verneed_section_index) |index| {
         shdrs[index].sh_size = self.verneed.size();
     }
 
     try self.updateSymtabSize();
     self.updateShStrtabSize();
 }
 
 // FIXME:JK this is very much obsolete, remove!
 pub fn updateShStrtabSize(self: *Elf) void {
     if (self.shstrtab_section_index) |index| {
         self.sections.items(.shdr)[index].sh_size = self.shstrtab.items.len;
     }
 }
 
 fn shdrToPhdrFlags(sh_flags: u64) u32 {
     const write = sh_flags & elf.SHF_WRITE != 0;
     const exec = sh_flags & elf.SHF_EXECINSTR != 0;
     var out_flags: u32 = elf.PF_R;
     if (write) out_flags |= elf.PF_W;
     if (exec) out_flags |= elf.PF_X;
     return out_flags;
 }
 
 /// Returns maximum number of program headers that may be emitted by the linker.
 /// (This is an upper bound so that we can reserve enough space for the header and progam header
 /// table without running out of space and being forced to move things around.)
 fn getMaxNumberOfPhdrs() u64 {
     // The estimated maximum number of segments the linker can emit for input sections are:
     var num: u64 = max_number_of_object_segments;
     // Any other non-loadable program headers, including TLS, DYNAMIC, GNU_STACK, GNU_EH_FRAME, INTERP:
     num += max_number_of_special_phdrs;
     // PHDR program header and corresponding read-only load segment:
     num += 2;
     return num;
 }
 
 fn addLoadPhdrs(self: *Elf) error{OutOfMemory}!void {
     for (self.sections.items(.shdr)) |shdr| {
         if (shdr.sh_type == elf.SHT_NULL) continue;
         if (shdr.sh_flags & elf.SHF_ALLOC == 0) continue;
         const flags = shdrToPhdrFlags(shdr.sh_flags);
         if (self.getPhdr(.{ .flags = flags, .type = elf.PT_LOAD }) == null) {
             _ = try self.addPhdr(.{ .flags = flags, .type = elf.PT_LOAD });
         }
     }
 }
 
 /// Allocates PHDR table in virtual memory and in file.
 fn allocatePhdrTable(self: *Elf) error{OutOfMemory}!void {
     const phdr_table = &self.phdrs.items[self.phdr_table_index.?];
     const phdr_table_load = &self.phdrs.items[self.phdr_table_load_index.?];
 
     const ehsize: u64 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Ehdr),
         .p64 => @sizeOf(elf.Elf64_Ehdr),
     };
     const phsize: u64 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Phdr),
         .p64 => @sizeOf(elf.Elf64_Phdr),
     };
     const needed_size = self.phdrs.items.len * phsize;
     const available_space = self.allocatedSize(phdr_table.p_offset);
 
     if (needed_size > available_space) {
         // In this case, we have two options:
         // 1. increase the available padding for EHDR + PHDR table so that we don't overflow it
         //    (revisit getMaxNumberOfPhdrs())
         // 2. shift everything in file to free more space for EHDR + PHDR table
         // TODO verify `getMaxNumberOfPhdrs()` is accurate and convert this into no-op
         var err = try self.base.addErrorWithNotes(1);
         try err.addMsg("fatal linker error: not enough space reserved for EHDR and PHDR table", .{});
         try err.addNote("required 0x{x}, available 0x{x}", .{ needed_size, available_space });
     }
 
     phdr_table_load.p_filesz = needed_size + ehsize;
     phdr_table_load.p_memsz = needed_size + ehsize;
     phdr_table.p_filesz = needed_size;
     phdr_table.p_memsz = needed_size;
 }
 
 /// Allocates alloc sections and creates load segments for sections
 /// extracted from input object files.
 pub fn allocateAllocSections(self: *Elf) !void {
     // We use this struct to track maximum alignment of all TLS sections.
     // According to https://github.com/rui314/mold/commit/bd46edf3f0fe9e1a787ea453c4657d535622e61f in mold,
     // in-file offsets have to be aligned against the start of TLS program header.
     // If that's not ensured, then in a multi-threaded context, TLS variables across a shared object
     // boundary may not get correctly loaded at an aligned address.
     const Align = struct {
         tls_start_align: u64 = 1,
         first_tls_index: ?usize = null,
 
         fn isFirstTlsShdr(this: @This(), other: usize) bool {
             if (this.first_tls_index) |index| return index == other;
             return false;
         }
 
         fn @"align"(this: @This(), index: usize, sh_addralign: u64, addr: u64) u64 {
             const alignment = if (this.isFirstTlsShdr(index)) this.tls_start_align else sh_addralign;
             return mem.alignForward(u64, addr, alignment);
         }
     };
 
     const slice = self.sections.slice();
     var alignment = Align{};
     for (slice.items(.shdr), 0..) |shdr, i| {
         if (shdr.sh_type == elf.SHT_NULL) continue;
         if (shdr.sh_flags & elf.SHF_TLS == 0) continue;
         if (alignment.first_tls_index == null) alignment.first_tls_index = i;
         alignment.tls_start_align = @max(alignment.tls_start_align, shdr.sh_addralign);
     }
 
     // Next, calculate segment covers by scanning all alloc sections.
     // If a section matches segment flags with the preceeding section,
     // we put it in the same segment. Otherwise, we create a new cover.
     // This algorithm is simple but suboptimal in terms of space re-use:
     // normally we would also take into account any gaps in allocated
     // virtual and file offsets. However, the simple one will do for one
     // as we are more interested in quick turnaround and compatibility
     // with `findFreeSpace` mechanics than anything else.
     const Cover = std.ArrayList(u32);
     const gpa = self.base.comp.gpa;
     var covers: [max_number_of_object_segments]Cover = undefined;
     for (&covers) |*cover| {
         cover.* = Cover.init(gpa);
     }
     defer for (&covers) |*cover| {
         cover.deinit();
     };
 
     for (slice.items(.shdr), 0..) |shdr, shndx| {
         if (shdr.sh_type == elf.SHT_NULL) continue;
         if (shdr.sh_flags & elf.SHF_ALLOC == 0) continue;
         const flags = shdrToPhdrFlags(shdr.sh_flags);
         try covers[flags - 1].append(@intCast(shndx));
     }
 
     // Now we can proceed with allocating the sections in virtual memory.
     // As the base address we take the end address of the PHDR table.
     // When allocating we first find the largest required alignment
     // of any section that is contained in a cover and use it to align
     // the start address of the segement (and first section).
     const phdr_table = &self.phdrs.items[self.phdr_table_load_index.?];
     var addr = phdr_table.p_vaddr + phdr_table.p_memsz;
 
     for (covers) |cover| {
         if (cover.items.len == 0) continue;
 
         var @"align": u64 = self.page_size;
         for (cover.items) |shndx| {
             const shdr = slice.items(.shdr)[shndx];
             if (shdr.sh_type == elf.SHT_NOBITS and shdr.sh_flags & elf.SHF_TLS != 0) continue;
             @"align" = @max(@"align", shdr.sh_addralign);
         }
 
         addr = mem.alignForward(u64, addr, @"align");
 
         var memsz: u64 = 0;
         var filesz: u64 = 0;
         var i: usize = 0;
         while (i < cover.items.len) : (i += 1) {
             const shndx = cover.items[i];
             const shdr = &slice.items(.shdr)[shndx];
             if (shdr.sh_type == elf.SHT_NOBITS and shdr.sh_flags & elf.SHF_TLS != 0) {
                 // .tbss is a little special as it's used only by the loader meaning it doesn't
                 // need to be actually mmap'ed at runtime. We still need to correctly increment
                 // the addresses of every TLS zerofill section tho. Thus, we hack it so that
                 // we increment the start address like normal, however, after we are done,
                 // the next ALLOC section will get its start address allocated within the same
                 // range as the .tbss sections. We will get something like this:
                 //
                 // ...
                 // .tbss 0x10
                 // .tcommon 0x20
                 // .data 0x10
                 // ...
                 var tbss_addr = addr;
                 while (i < cover.items.len and
                     slice.items(.shdr)[cover.items[i]].sh_type == elf.SHT_NOBITS and
                     slice.items(.shdr)[cover.items[i]].sh_flags & elf.SHF_TLS != 0) : (i += 1)
                 {
                     const tbss_shndx = cover.items[i];
                     const tbss_shdr = &slice.items(.shdr)[tbss_shndx];
                     tbss_addr = alignment.@"align"(tbss_shndx, tbss_shdr.sh_addralign, tbss_addr);
                     tbss_shdr.sh_addr = tbss_addr;
                     tbss_addr += tbss_shdr.sh_size;
                 }
                 i -= 1;
                 continue;
             }
             const next = alignment.@"align"(shndx, shdr.sh_addralign, addr);
             const padding = next - addr;
             addr = next;
             shdr.sh_addr = addr;
             if (shdr.sh_type != elf.SHT_NOBITS) {
                 filesz += padding + shdr.sh_size;
             }
             memsz += padding + shdr.sh_size;
             addr += shdr.sh_size;
         }
 
         const first = slice.items(.shdr)[cover.items[0]];
         const phndx = self.getPhdr(.{ .type = elf.PT_LOAD, .flags = shdrToPhdrFlags(first.sh_flags) }).?;
         const phdr = &self.phdrs.items[phndx];
         const allocated_size = self.allocatedSize(phdr.p_offset);
         if (filesz > allocated_size) {
             const old_offset = phdr.p_offset;
             phdr.p_offset = 0;
             var new_offset = try self.findFreeSpace(filesz, @"align");
             phdr.p_offset = new_offset;
 
             log.debug("moving phdr({d}) from 0x{x} to 0x{x}", .{ phndx, old_offset, new_offset });
 
             for (cover.items) |shndx| {
                 const shdr = &slice.items(.shdr)[shndx];
                 slice.items(.phndx)[shndx] = phndx;
                 if (shdr.sh_type == elf.SHT_NOBITS) {
                     shdr.sh_offset = 0;
                     continue;
                 }
                 new_offset = alignment.@"align"(shndx, shdr.sh_addralign, new_offset);
 
                 log.debug("moving {s} from 0x{x} to 0x{x}", .{
                     self.getShString(shdr.sh_name),
                     shdr.sh_offset,
                     new_offset,
                 });
 
                 if (shdr.sh_offset > 0) {
                     // Get size actually commited to the output file.
                     const existing_size = self.sectionSize(shndx);
                     const amt = try self.base.file.?.copyRangeAll(
                         shdr.sh_offset,
                         self.base.file.?,
                         new_offset,
                         existing_size,
                     );
                     if (amt != existing_size) return error.InputOutput;
                 }
 
                 shdr.sh_offset = new_offset;
                 new_offset += shdr.sh_size;
             }
         }
 
         phdr.p_vaddr = first.sh_addr;
         phdr.p_paddr = first.sh_addr;
         phdr.p_memsz = memsz;
         phdr.p_filesz = filesz;
         phdr.p_align = @"align";
 
         addr = mem.alignForward(u64, addr, self.page_size);
     }
 }
 
 /// Allocates non-alloc sections (debug info, symtabs, etc.).
 pub fn allocateNonAllocSections(self: *Elf) !void {
     for (self.sections.items(.shdr), 0..) |*shdr, shndx| {
         if (shdr.sh_type == elf.SHT_NULL) continue;
         if (shdr.sh_flags & elf.SHF_ALLOC != 0) continue;
         const needed_size = shdr.sh_size;
         if (needed_size > self.allocatedSize(shdr.sh_offset)) {
             shdr.sh_size = 0;
             const new_offset = try self.findFreeSpace(needed_size, shdr.sh_addralign);
 
             if (self.zigObjectPtr()) |zo| blk: {
                 const existing_size = for ([_]?Symbol.Index{
                     zo.debug_info_index,
                     zo.debug_abbrev_index,
                     zo.debug_aranges_index,
                     zo.debug_str_index,
                     zo.debug_line_index,
                     zo.debug_line_str_index,
                     zo.debug_loclists_index,
                     zo.debug_rnglists_index,
                 }) |maybe_sym_index| {
                     const sym_index = maybe_sym_index orelse continue;
                     const sym = zo.symbol(sym_index);
                     const atom_ptr = sym.atom(self).?;
                     if (atom_ptr.output_section_index == shndx) break atom_ptr.size;
                 } else break :blk;
                 log.debug("moving {s} from 0x{x} to 0x{x}", .{
                     self.getShString(shdr.sh_name),
                     shdr.sh_offset,
                     new_offset,
                 });
                 const amt = try self.base.file.?.copyRangeAll(
                     shdr.sh_offset,
                     self.base.file.?,
                     new_offset,
                     existing_size,
                 );
                 if (amt != existing_size) return error.InputOutput;
             }
 
             shdr.sh_offset = new_offset;
             shdr.sh_size = needed_size;
         }
     }
 }
 
 fn allocateSpecialPhdrs(self: *Elf) void {
     const slice = self.sections.slice();
 
     for (&[_]struct { ?u16, ?u32 }{
         .{ self.phdr_interp_index, self.interp_section_index },
         .{ self.phdr_dynamic_index, self.dynamic_section_index },
         .{ self.phdr_gnu_eh_frame_index, self.eh_frame_hdr_section_index },
     }) |pair| {
         if (pair[0]) |index| {
             const shdr = slice.items(.shdr)[pair[1].?];
             const phdr = &self.phdrs.items[index];
             phdr.p_align = shdr.sh_addralign;
             phdr.p_offset = shdr.sh_offset;
             phdr.p_vaddr = shdr.sh_addr;
             phdr.p_paddr = shdr.sh_addr;
             phdr.p_filesz = shdr.sh_size;
             phdr.p_memsz = shdr.sh_size;
         }
     }
 
     // Set the TLS segment boundaries.
     // We assume TLS sections are laid out contiguously and that there is
     // a single TLS segment.
     if (self.phdr_tls_index) |index| {
         const shdrs = slice.items(.shdr);
         const phdr = &self.phdrs.items[index];
         var shndx: u32 = 0;
         while (shndx < shdrs.len) {
             const shdr = shdrs[shndx];
             if (shdr.sh_flags & elf.SHF_TLS == 0) {
                 shndx += 1;
                 continue;
             }
             phdr.p_offset = shdr.sh_offset;
             phdr.p_vaddr = shdr.sh_addr;
             phdr.p_paddr = shdr.sh_addr;
             phdr.p_align = shdr.sh_addralign;
             shndx += 1;
             phdr.p_align = @max(phdr.p_align, shdr.sh_addralign);
             if (shdr.sh_type != elf.SHT_NOBITS) {
                 phdr.p_filesz = shdr.sh_offset + shdr.sh_size - phdr.p_offset;
             }
             phdr.p_memsz = shdr.sh_addr + shdr.sh_size - phdr.p_vaddr;
 
             while (shndx < shdrs.len) : (shndx += 1) {
                 const next = shdrs[shndx];
                 if (next.sh_flags & elf.SHF_TLS == 0) break;
                 phdr.p_align = @max(phdr.p_align, next.sh_addralign);
                 if (next.sh_type != elf.SHT_NOBITS) {
                     phdr.p_filesz = next.sh_offset + next.sh_size - phdr.p_offset;
                 }
                 phdr.p_memsz = next.sh_addr + next.sh_size - phdr.p_vaddr;
             }
         }
     }
 }
 
 fn writeAtoms(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
 
     var undefs = std.AutoArrayHashMap(SymbolResolver.Index, std.ArrayList(Ref)).init(gpa);
     defer {
         for (undefs.values()) |*refs| {
             refs.deinit();
         }
         undefs.deinit();
     }
 
     var buffer = std.ArrayList(u8).init(gpa);
     defer buffer.deinit();
 
     const slice = self.sections.slice();
     var has_reloc_errors = false;
     for (slice.items(.shdr), slice.items(.atom_list_2)) |shdr, atom_list| {
         if (shdr.sh_type == elf.SHT_NOBITS) continue;
         if (atom_list.atoms.keys().len == 0) continue;
         atom_list.write(&buffer, &undefs, self) catch |err| switch (err) {
             error.UnsupportedCpuArch => {
                 try self.reportUnsupportedCpuArch();
                 return error.FlushFailure;
             },
             error.RelocFailure, error.RelaxFailure => has_reloc_errors = true,
             else => |e| return e,
         };
     }
 
     try self.reportUndefinedSymbols(&undefs);
     if (has_reloc_errors) return error.FlushFailure;
 
     if (self.requiresThunks()) {
         for (self.thunks.items) |th| {
             const thunk_size = th.size(self);
             try buffer.ensureUnusedCapacity(thunk_size);
             const shdr = slice.items(.shdr)[th.output_section_index];
             const offset = @as(u64, @intCast(th.value)) + shdr.sh_offset;
             try th.write(self, buffer.writer());
             assert(buffer.items.len == thunk_size);
             try self.base.file.?.pwriteAll(buffer.items, offset);
             buffer.clearRetainingCapacity();
         }
     }
 }
 
 pub fn updateSymtabSize(self: *Elf) !void {
     var nlocals: u32 = 0;
     var nglobals: u32 = 0;
     var strsize: u32 = 0;
 
     const gpa = self.base.comp.gpa;
     var files = std.ArrayList(File.Index).init(gpa);
     defer files.deinit();
     try files.ensureTotalCapacityPrecise(self.objects.items.len + self.shared_objects.items.len + 2);
 
     if (self.zig_object_index) |index| files.appendAssumeCapacity(index);
     for (self.objects.items) |index| files.appendAssumeCapacity(index);
     for (self.shared_objects.items) |index| files.appendAssumeCapacity(index);
     if (self.linker_defined_index) |index| files.appendAssumeCapacity(index);
 
     // Section symbols
     nlocals += @intCast(self.sections.slice().len);
 
     if (self.requiresThunks()) for (self.thunks.items) |*th| {
         th.output_symtab_ctx.reset();
         th.output_symtab_ctx.ilocal = nlocals;
         th.calcSymtabSize(self);
         nlocals += th.output_symtab_ctx.nlocals;
         strsize += th.output_symtab_ctx.strsize;
     };
 
     for (files.items) |index| {
         const file_ptr = self.file(index).?;
         const ctx = switch (file_ptr) {
             inline else => |x| &x.output_symtab_ctx,
         };
         ctx.reset();
         ctx.ilocal = nlocals;
         ctx.iglobal = nglobals;
         try file_ptr.updateSymtabSize(self);
         nlocals += ctx.nlocals;
         nglobals += ctx.nglobals;
         strsize += ctx.strsize;
     }
 
     if (self.got_section_index) |_| {
         self.got.output_symtab_ctx.reset();
         self.got.output_symtab_ctx.ilocal = nlocals;
         self.got.updateSymtabSize(self);
         nlocals += self.got.output_symtab_ctx.nlocals;
         strsize += self.got.output_symtab_ctx.strsize;
     }
 
     if (self.plt_section_index) |_| {
         self.plt.output_symtab_ctx.reset();
         self.plt.output_symtab_ctx.ilocal = nlocals;
         self.plt.updateSymtabSize(self);
         nlocals += self.plt.output_symtab_ctx.nlocals;
         strsize += self.plt.output_symtab_ctx.strsize;
     }
 
     if (self.plt_got_section_index) |_| {
         self.plt_got.output_symtab_ctx.reset();
         self.plt_got.output_symtab_ctx.ilocal = nlocals;
         self.plt_got.updateSymtabSize(self);
         nlocals += self.plt_got.output_symtab_ctx.nlocals;
         strsize += self.plt_got.output_symtab_ctx.strsize;
     }
 
     for (files.items) |index| {
         const file_ptr = self.file(index).?;
         const ctx = switch (file_ptr) {
             inline else => |x| &x.output_symtab_ctx,
         };
         ctx.iglobal += nlocals;
     }
 
     const slice = self.sections.slice();
     const symtab_shdr = &slice.items(.shdr)[self.symtab_section_index.?];
     symtab_shdr.sh_info = nlocals;
     symtab_shdr.sh_link = self.strtab_section_index.?;
 
     const sym_size: u64 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Sym),
         .p64 => @sizeOf(elf.Elf64_Sym),
     };
     const needed_size = (nlocals + nglobals) * sym_size;
     symtab_shdr.sh_size = needed_size;
 
     const strtab = &slice.items(.shdr)[self.strtab_section_index.?];
     strtab.sh_size = strsize + 1;
 }
 
 fn writeSyntheticSections(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     const slice = self.sections.slice();
 
     if (self.interp_section_index) |shndx| {
         var buffer: [256]u8 = undefined;
         const interp = self.getTarget().dynamic_linker.get().?;
         @memcpy(buffer[0..interp.len], interp);
         buffer[interp.len] = 0;
         const contents = buffer[0 .. interp.len + 1];
         const shdr = slice.items(.shdr)[shndx];
         assert(shdr.sh_size == contents.len);
         try self.base.file.?.pwriteAll(contents, shdr.sh_offset);
     }
 
     if (self.hash_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         try self.base.file.?.pwriteAll(self.hash.buffer.items, shdr.sh_offset);
     }
 
     if (self.gnu_hash_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.gnu_hash.size());
         defer buffer.deinit();
         try self.gnu_hash.write(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.versym_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         try self.base.file.?.pwriteAll(mem.sliceAsBytes(self.versym.items), shdr.sh_offset);
     }
 
     if (self.verneed_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.verneed.size());
         defer buffer.deinit();
         try self.verneed.write(buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.dynamic_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.dynamic.size(self));
         defer buffer.deinit();
         try self.dynamic.write(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.dynsymtab_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.dynsym.size());
         defer buffer.deinit();
         try self.dynsym.write(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.dynstrtab_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         try self.base.file.?.pwriteAll(self.dynstrtab.items, shdr.sh_offset);
     }
 
     if (self.eh_frame_section_index) |shndx| {
         const existing_size = existing_size: {
             const zo = self.zigObjectPtr() orelse break :existing_size 0;
             const sym = zo.symbol(zo.eh_frame_index orelse break :existing_size 0);
             break :existing_size sym.atom(self).?.size;
         };
         const shdr = slice.items(.shdr)[shndx];
         const sh_size = math.cast(usize, shdr.sh_size) orelse return error.Overflow;
         var buffer = try std.ArrayList(u8).initCapacity(gpa, @intCast(sh_size - existing_size));
         defer buffer.deinit();
         try eh_frame.writeEhFrame(self, buffer.writer());
         assert(buffer.items.len == sh_size - existing_size);
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset + existing_size);
     }
 
     if (self.eh_frame_hdr_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         const sh_size = math.cast(usize, shdr.sh_size) orelse return error.Overflow;
         var buffer = try std.ArrayList(u8).initCapacity(gpa, sh_size);
         defer buffer.deinit();
         try eh_frame.writeEhFrameHdr(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.got_section_index) |index| {
         const shdr = slice.items(.shdr)[index];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.got.size(self));
         defer buffer.deinit();
         try self.got.write(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.rela_dyn_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         try self.got.addRela(self);
         try self.copy_rel.addRela(self);
         self.sortRelaDyn();
         try self.base.file.?.pwriteAll(mem.sliceAsBytes(self.rela_dyn.items), shdr.sh_offset);
     }
 
     if (self.plt_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.plt.size(self));
         defer buffer.deinit();
         try self.plt.write(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.got_plt_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.got_plt.size(self));
         defer buffer.deinit();
         try self.got_plt.write(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.plt_got_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         var buffer = try std.ArrayList(u8).initCapacity(gpa, self.plt_got.size(self));
         defer buffer.deinit();
         try self.plt_got.write(self, buffer.writer());
         try self.base.file.?.pwriteAll(buffer.items, shdr.sh_offset);
     }
 
     if (self.rela_plt_section_index) |shndx| {
         const shdr = slice.items(.shdr)[shndx];
         try self.plt.addRela(self);
         try self.base.file.?.pwriteAll(mem.sliceAsBytes(self.rela_plt.items), shdr.sh_offset);
     }
 
     try self.writeSymtab();
     try self.writeShStrtab();
 }
 
 // FIXME:JK again, why is this needed?
 pub fn writeShStrtab(self: *Elf) !void {
     if (self.shstrtab_section_index) |index| {
         const shdr = self.sections.items(.shdr)[index];
         log.debug("writing .shstrtab from 0x{x} to 0x{x}", .{ shdr.sh_offset, shdr.sh_offset + shdr.sh_size });
         try self.base.file.?.pwriteAll(self.shstrtab.items, shdr.sh_offset);
     }
 }
 
 pub fn writeSymtab(self: *Elf) !void {
     const gpa = self.base.comp.gpa;
     const slice = self.sections.slice();
     const symtab_shdr = slice.items(.shdr)[self.symtab_section_index.?];
     const strtab_shdr = slice.items(.shdr)[self.strtab_section_index.?];
     const sym_size: u64 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Sym),
         .p64 => @sizeOf(elf.Elf64_Sym),
     };
     const nsyms = math.cast(usize, @divExact(symtab_shdr.sh_size, sym_size)) orelse return error.Overflow;
 
     log.debug("writing {d} symbols in .symtab from 0x{x} to 0x{x}", .{
         nsyms,
         symtab_shdr.sh_offset,
         symtab_shdr.sh_offset + symtab_shdr.sh_size,
     });
     log.debug("writing .strtab from 0x{x} to 0x{x}", .{
         strtab_shdr.sh_offset,
         strtab_shdr.sh_offset + strtab_shdr.sh_size,
     });
 
     try self.symtab.resize(gpa, nsyms);
     const needed_strtab_size = math.cast(usize, strtab_shdr.sh_size - 1) orelse return error.Overflow;
     // TODO we could resize instead and in ZigObject/Object always access as slice
     self.strtab.clearRetainingCapacity();
     self.strtab.appendAssumeCapacity(0);
     try self.strtab.ensureUnusedCapacity(gpa, needed_strtab_size);
 
     for (slice.items(.shdr), 0..) |shdr, shndx| {
         const out_sym = &self.symtab.items[shndx];
         out_sym.* = .{
             .st_name = 0,
             .st_value = shdr.sh_addr,
             .st_info = if (shdr.sh_type == elf.SHT_NULL) elf.STT_NOTYPE else elf.STT_SECTION,
             .st_shndx = @intCast(shndx),
             .st_size = 0,
             .st_other = 0,
         };
     }
 
     if (self.requiresThunks()) for (self.thunks.items) |th| {
         th.writeSymtab(self);
     };
 
     if (self.zigObjectPtr()) |zig_object| {
         zig_object.asFile().writeSymtab(self);
     }
 
     for (self.objects.items) |index| {
         const file_ptr = self.file(index).?;
         file_ptr.writeSymtab(self);
     }
 
     for (self.shared_objects.items) |index| {
         const file_ptr = self.file(index).?;
         file_ptr.writeSymtab(self);
     }
 
     if (self.linkerDefinedPtr()) |obj| {
         obj.asFile().writeSymtab(self);
     }
 
     if (self.got_section_index) |_| {
         self.got.writeSymtab(self);
     }
 
     if (self.plt_section_index) |_| {
         self.plt.writeSymtab(self);
     }
 
     if (self.plt_got_section_index) |_| {
         self.plt_got.writeSymtab(self);
     }
 
     const foreign_endian = self.getTarget().cpu.arch.endian() != builtin.cpu.arch.endian();
     switch (self.ptr_width) {
         .p32 => {
             const buf = try gpa.alloc(elf.Elf32_Sym, self.symtab.items.len);
             defer gpa.free(buf);
 
             for (buf, self.symtab.items) |*out, sym| {
                 out.* = .{
                     .st_name = sym.st_name,
                     .st_info = sym.st_info,
                     .st_other = sym.st_other,
                     .st_shndx = sym.st_shndx,
                     .st_value = @as(u32, @intCast(sym.st_value)),
                     .st_size = @as(u32, @intCast(sym.st_size)),
                 };
                 if (foreign_endian) mem.byteSwapAllFields(elf.Elf32_Sym, out);
             }
             try self.base.file.?.pwriteAll(mem.sliceAsBytes(buf), symtab_shdr.sh_offset);
         },
         .p64 => {
             if (foreign_endian) {
                 for (self.symtab.items) |*sym| mem.byteSwapAllFields(elf.Elf64_Sym, sym);
             }
             try self.base.file.?.pwriteAll(mem.sliceAsBytes(self.symtab.items), symtab_shdr.sh_offset);
         },
     }
 
     try self.base.file.?.pwriteAll(self.strtab.items, strtab_shdr.sh_offset);
 }
 
 /// Always 4 or 8 depending on whether this is 32-bit ELF or 64-bit ELF.
 pub fn ptrWidthBytes(self: Elf) u8 {
     return switch (self.ptr_width) {
         .p32 => 4,
         .p64 => 8,
     };
 }
 
 /// Does not necessarily match `ptrWidthBytes` for example can be 2 bytes
 /// in a 32-bit ELF file.
 pub fn archPtrWidthBytes(self: Elf) u8 {
     return @intCast(@divExact(self.getTarget().ptrBitWidth(), 8));
 }
 
 fn phdrTo32(phdr: elf.Elf64_Phdr) elf.Elf32_Phdr {
     return .{
         .p_type = phdr.p_type,
         .p_flags = phdr.p_flags,
         .p_offset = @as(u32, @intCast(phdr.p_offset)),
         .p_vaddr = @as(u32, @intCast(phdr.p_vaddr)),
         .p_paddr = @as(u32, @intCast(phdr.p_paddr)),
         .p_filesz = @as(u32, @intCast(phdr.p_filesz)),
         .p_memsz = @as(u32, @intCast(phdr.p_memsz)),
         .p_align = @as(u32, @intCast(phdr.p_align)),
     };
 }
 
 fn shdrTo32(shdr: elf.Elf64_Shdr) elf.Elf32_Shdr {
     return .{
         .sh_name = shdr.sh_name,
         .sh_type = shdr.sh_type,
         .sh_flags = @as(u32, @intCast(shdr.sh_flags)),
         .sh_addr = @as(u32, @intCast(shdr.sh_addr)),
         .sh_offset = @as(u32, @intCast(shdr.sh_offset)),
         .sh_size = @as(u32, @intCast(shdr.sh_size)),
         .sh_link = shdr.sh_link,
         .sh_info = shdr.sh_info,
         .sh_addralign = @as(u32, @intCast(shdr.sh_addralign)),
         .sh_entsize = @as(u32, @intCast(shdr.sh_entsize)),
     };
 }
 
 fn getLDMOption(target: std.Target) ?[]const u8 {
     // This should only return emulations understood by LLD's parseEmulation().
     return switch (target.cpu.arch) {
         .aarch64 => switch (target.os.tag) {
             .linux => "aarch64linux",
             else => "aarch64elf",
         },
         .aarch64_be => switch (target.os.tag) {
             .linux => "aarch64linuxb",
             else => "aarch64elfb",
         },
         .amdgcn => "elf64_amdgpu",
         .arm, .thumb => switch (target.os.tag) {
             .linux => "armelf_linux_eabi",
             else => "armelf",
         },
         .armeb, .thumbeb => switch (target.os.tag) {
             .linux => "armelfb_linux_eabi",
             else => "armelfb",
         },
         .hexagon => "hexagonelf",
         .loongarch32 => "elf32loongarch",
         .loongarch64 => "elf64loongarch",
         .mips => switch (target.os.tag) {
             .freebsd => "elf32btsmip_fbsd",
             else => "elf32btsmip",
         },
         .mipsel => switch (target.os.tag) {
             .freebsd => "elf32ltsmip_fbsd",
             else => "elf32ltsmip",
         },
         .mips64 => switch (target.os.tag) {
             .freebsd => switch (target.abi) {
                 .gnuabin32 => "elf32btsmipn32_fbsd",
                 else => "elf64btsmip_fbsd",
             },
             else => switch (target.abi) {
                 .gnuabin32 => "elf32btsmipn32",
                 else => "elf64btsmip",
             },
         },
         .mips64el => switch (target.os.tag) {
             .freebsd => switch (target.abi) {
                 .gnuabin32 => "elf32ltsmipn32_fbsd",
                 else => "elf64ltsmip_fbsd",
             },
             else => switch (target.abi) {
                 .gnuabin32 => "elf32ltsmipn32",
                 else => "elf64ltsmip",
             },
         },
         .msp430 => "msp430elf",
         .powerpc => switch (target.os.tag) {
             .freebsd => "elf32ppc_fbsd",
             .linux => "elf32ppclinux",
             else => "elf32ppc",
         },
         .powerpcle => switch (target.os.tag) {
             .linux => "elf32lppclinux",
             else => "elf32lppc",
         },
         .powerpc64 => "elf64ppc",
         .powerpc64le => "elf64lppc",
         .riscv32 => "elf32lriscv",
         .riscv64 => "elf64lriscv",
         .s390x => "elf64_s390",
         .sparc64 => "elf64_sparc",
         .x86 => switch (target.os.tag) {
             .elfiamcu => "elf_iamcu",
             .freebsd => "elf_i386_fbsd",
             else => "elf_i386",
         },
         .x86_64 => switch (target.abi) {
             .gnux32, .muslx32 => "elf32_x86_64",
             else => "elf_x86_64",
         },
         else => null,
     };
 }
 
 pub fn padToIdeal(actual_size: anytype) @TypeOf(actual_size) {
     return actual_size +| (actual_size / ideal_factor);
 }
 
 // Provide a blueprint of csu (c-runtime startup) objects for supported
 // link modes.
 //
 // This is for cross-mode targets only. For host-mode targets the system
 // compiler can be probed to produce a robust blueprint.
 //
 // Targets requiring a libc for which zig does not bundle a libc are
 // host-mode targets. Unfortunately, host-mode probes are not yet
 // implemented. For now the data is hard-coded here. Such targets are
 // { freebsd, netbsd, openbsd, dragonfly }.
 const CsuObjects = struct {
     crt0: ?[]const u8 = null,
     crti: ?[]const u8 = null,
     crtbegin: ?[]const u8 = null,
     crtend: ?[]const u8 = null,
     crtn: ?[]const u8 = null,
 
     const InitArgs = struct {};
 
     fn init(arena: Allocator, comp: *const Compilation) !CsuObjects {
         // crt objects are only required for libc.
         if (!comp.config.link_libc) return .{};
 
         var result: CsuObjects = .{};
 
         // Flatten crt cases.
         const mode: enum {
             dynamic_lib,
             dynamic_exe,
             dynamic_pie,
             static_exe,
             static_pie,
         } = switch (comp.config.output_mode) {
             .Obj => return CsuObjects{},
             .Lib => switch (comp.config.link_mode) {
                 .dynamic => .dynamic_lib,
                 .static => return CsuObjects{},
             },
             .Exe => switch (comp.config.link_mode) {
                 .dynamic => if (comp.config.pie) .dynamic_pie else .dynamic_exe,
                 .static => if (comp.config.pie) .static_pie else .static_exe,
             },
         };
 
         const target = comp.root_mod.resolved_target.result;
 
         if (target.isAndroid()) {
             switch (mode) {
                 // zig fmt: off
                 .dynamic_lib => result.set( null, null, "crtbegin_so.o",      "crtend_so.o",      null ),
                 .dynamic_exe,
                 .dynamic_pie => result.set( null, null, "crtbegin_dynamic.o", "crtend_android.o", null ),
                 .static_exe,
                 .static_pie  => result.set( null, null, "crtbegin_static.o",  "crtend_android.o", null ),
                 // zig fmt: on
             }
         } else {
             switch (target.os.tag) {
                 .linux => {
                     switch (mode) {
                         // zig fmt: off
                         .dynamic_lib => result.set( null,      "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                         .dynamic_exe => result.set( "crt1.o",  "crti.o", "crtbegin.o",  "crtend.o",  "crtn.o" ),
                         .dynamic_pie => result.set( "Scrt1.o", "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                         .static_exe  => result.set( "crt1.o",  "crti.o", "crtbeginT.o", "crtend.o",  "crtn.o" ),
                         .static_pie  => result.set( "rcrt1.o", "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                         // zig fmt: on
                     }
                     if (comp.libc_installation) |_| {
                         // hosted-glibc provides crtbegin/end objects in platform/compiler-specific dirs
                         // and they are not known at comptime. For now null-out crtbegin/end objects;
                         // there is no feature loss, zig has never linked those objects in before.
                         result.crtbegin = null;
                         result.crtend = null;
                     } else {
                         // Bundled glibc only has Scrt1.o .
                         if (result.crt0 != null and target.isGnuLibC()) result.crt0 = "Scrt1.o";
                     }
                 },
                 .dragonfly => switch (mode) {
                     // zig fmt: off
                     .dynamic_lib => result.set( null,      "crti.o", "crtbeginS.o",  "crtendS.o", "crtn.o" ),
                     .dynamic_exe => result.set( "crt1.o",  "crti.o", "crtbegin.o",   "crtend.o",  "crtn.o" ),
                     .dynamic_pie => result.set( "Scrt1.o", "crti.o", "crtbeginS.o",  "crtendS.o", "crtn.o" ),
                     .static_exe  => result.set( "crt1.o",  "crti.o", "crtbegin.o",   "crtend.o",  "crtn.o" ),
                     .static_pie  => result.set( "Scrt1.o", "crti.o", "crtbeginS.o",  "crtendS.o", "crtn.o" ),
                     // zig fmt: on
                 },
                 .freebsd => switch (mode) {
                     // zig fmt: off
                     .dynamic_lib => result.set( null,      "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     .dynamic_exe => result.set( "crt1.o",  "crti.o", "crtbegin.o",  "crtend.o",  "crtn.o" ),
                     .dynamic_pie => result.set( "Scrt1.o", "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     .static_exe  => result.set( "crt1.o",  "crti.o", "crtbeginT.o", "crtend.o",  "crtn.o" ),
                     .static_pie  => result.set( "Scrt1.o", "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     // zig fmt: on
                 },
                 .netbsd => switch (mode) {
                     // zig fmt: off
                     .dynamic_lib => result.set( null,     "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     .dynamic_exe => result.set( "crt0.o", "crti.o", "crtbegin.o",  "crtend.o",  "crtn.o" ),
                     .dynamic_pie => result.set( "crt0.o", "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     .static_exe  => result.set( "crt0.o", "crti.o", "crtbeginT.o", "crtend.o",  "crtn.o" ),
                     .static_pie  => result.set( "crt0.o", "crti.o", "crtbeginT.o", "crtendS.o", "crtn.o" ),
                     // zig fmt: on
                 },
                 .openbsd => switch (mode) {
                     // zig fmt: off
                     .dynamic_lib => result.set( null,      null, "crtbeginS.o", "crtendS.o", null ),
                     .dynamic_exe,
                     .dynamic_pie => result.set( "crt0.o",  null, "crtbegin.o",  "crtend.o",  null ),
                     .static_exe,
                     .static_pie  => result.set( "rcrt0.o", null, "crtbegin.o",  "crtend.o",  null ),
                     // zig fmt: on
                 },
                 .haiku => switch (mode) {
                     // zig fmt: off
                     .dynamic_lib => result.set( null,          "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     .dynamic_exe => result.set( "start_dyn.o", "crti.o", "crtbegin.o",  "crtend.o",  "crtn.o" ),
                     .dynamic_pie => result.set( "start_dyn.o", "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     .static_exe  => result.set( "start_dyn.o", "crti.o", "crtbegin.o",  "crtend.o",  "crtn.o" ),
                     .static_pie  => result.set( "start_dyn.o", "crti.o", "crtbeginS.o", "crtendS.o", "crtn.o" ),
                     // zig fmt: on
                 },
                 .solaris, .illumos => switch (mode) {
                     // zig fmt: off
                     .dynamic_lib => result.set( null,     "crti.o", null, null, "crtn.o" ),
                     .dynamic_exe,
                     .dynamic_pie => result.set( "crt1.o", "crti.o", null, null, "crtn.o" ),
                     .static_exe,
                     .static_pie  => result.set( null,     null,     null, null, null     ),
                     // zig fmt: on
                 },
                 else => {},
             }
         }
 
         // Convert each object to a full pathname.
         if (comp.libc_installation) |lci| {
             const crt_dir_path = lci.crt_dir orelse return error.LibCInstallationMissingCRTDir;
             switch (target.os.tag) {
                 .dragonfly => {
                     if (result.crt0) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, obj.* });
                     if (result.crti) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, obj.* });
                     if (result.crtn) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, obj.* });
 
                     var gccv: []const u8 = undefined;
                     if (target.os.version_range.semver.isAtLeast(.{ .major = 5, .minor = 4, .patch = 0 }) orelse true) {
                         gccv = "gcc80";
                     } else {
                         gccv = "gcc54";
                     }
 
                     if (result.crtbegin) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, gccv, obj.* });
                     if (result.crtend) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, gccv, obj.* });
                 },
                 .haiku => {
                     const gcc_dir_path = lci.gcc_dir orelse return error.LibCInstallationMissingCRTDir;
                     if (result.crt0) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, obj.* });
                     if (result.crti) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, obj.* });
                     if (result.crtn) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, obj.* });
 
                     if (result.crtbegin) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ gcc_dir_path, obj.* });
                     if (result.crtend) |*obj| obj.* = try fs.path.join(arena, &[_][]const u8{ gcc_dir_path, obj.* });
                 },
                 else => {
                     inline for (std.meta.fields(@TypeOf(result))) |f| {
                         if (@field(result, f.name)) |*obj| {
                             obj.* = try fs.path.join(arena, &[_][]const u8{ crt_dir_path, obj.* });
                         }
                     }
                 },
             }
         } else {
             inline for (std.meta.fields(@TypeOf(result))) |f| {
                 if (@field(result, f.name)) |*obj| {
                     if (comp.crt_files.get(obj.*)) |crtf| {
                         obj.* = crtf.full_object_path;
                     } else {
                         @field(result, f.name) = null;
                     }
                 }
             }
         }
 
         return result;
     }
 
     fn set(
         self: *CsuObjects,
         crt0: ?[]const u8,
         crti: ?[]const u8,
         crtbegin: ?[]const u8,
         crtend: ?[]const u8,
         crtn: ?[]const u8,
     ) void {
         self.crt0 = crt0;
         self.crti = crti;
         self.crtbegin = crtbegin;
         self.crtend = crtend;
         self.crtn = crtn;
     }
 };
 
 /// If a target compiles other output modes as dynamic libraries,
 /// this function returns true for those too.
 pub fn isEffectivelyDynLib(self: Elf) bool {
     if (self.base.isDynLib()) return true;
     return switch (self.getTarget().os.tag) {
         .haiku => self.base.isExe(),
         else => false,
     };
 }
 
 fn getPhdr(self: *Elf, opts: struct {
     type: u32 = 0,
     flags: u32 = 0,
 }) ?u16 {
     for (self.phdrs.items, 0..) |phdr, phndx| {
         if (self.phdr_table_load_index) |index| {
             if (phndx == index) continue;
         }
         if (phdr.p_type == opts.type and phdr.p_flags == opts.flags) return @intCast(phndx);
     }
     return null;
 }
 
 fn addPhdr(self: *Elf, opts: struct {
     type: u32 = 0,
     flags: u32 = 0,
     @"align": u64 = 0,
     offset: u64 = 0,
     addr: u64 = 0,
     filesz: u64 = 0,
     memsz: u64 = 0,
 }) error{OutOfMemory}!u16 {
     const gpa = self.base.comp.gpa;
     const index = @as(u16, @intCast(self.phdrs.items.len));
     try self.phdrs.append(gpa, .{
         .p_type = opts.type,
         .p_flags = opts.flags,
         .p_offset = opts.offset,
         .p_vaddr = opts.addr,
         .p_paddr = opts.addr,
         .p_filesz = opts.filesz,
         .p_memsz = opts.memsz,
         .p_align = opts.@"align",
     });
     return index;
 }
 
 pub fn addRelaShdr(self: *Elf, name: u32, shndx: u32) !u32 {
     const entsize: u64 = switch (self.ptr_width) {
         .p32 => @sizeOf(elf.Elf32_Rela),
         .p64 => @sizeOf(elf.Elf64_Rela),
     };
     const addralign: u64 = switch (self.ptr_width) {
         .p32 => @alignOf(elf.Elf32_Rela),
         .p64 => @alignOf(elf.Elf64_Rela),
     };
     return self.addSection(.{
         .name = name,
         .type = elf.SHT_RELA,
         .flags = elf.SHF_INFO_LINK,
         .entsize = entsize,
         .info = shndx,
         .addralign = addralign,
         .offset = std.math.maxInt(u64),
     });
 }
 
 pub const AddSectionOpts = struct {
     name: u32 = 0,
     type: u32 = elf.SHT_NULL,
     flags: u64 = 0,
     link: u32 = 0,
     info: u32 = 0,
     addralign: u64 = 0,
     entsize: u64 = 0,
     offset: u64 = 0,
 };
 
 pub fn addSection(self: *Elf, opts: AddSectionOpts) !u32 {
     const gpa = self.base.comp.gpa;
     const index: u32 = @intCast(try self.sections.addOne(gpa));
     self.sections.set(index, .{
         .shdr = .{
             .sh_name = opts.name,
             .sh_type = opts.type,
             .sh_flags = opts.flags,
             .sh_addr = 0,
             .sh_offset = opts.offset,
             .sh_size = 0,
             .sh_link = opts.link,
             .sh_info = opts.info,
             .sh_addralign = opts.addralign,
             .sh_entsize = opts.entsize,
         },
     });
     return index;
 }
 
 pub fn sectionByName(self: *Elf, name: [:0]const u8) ?u32 {
     for (self.sections.items(.shdr), 0..) |*shdr, i| {
         const this_name = self.getShString(shdr.sh_name);
         if (mem.eql(u8, this_name, name)) return @intCast(i);
     } else return null;
 }
 
 const RelaDyn = struct {
     offset: u64,
     sym: u64 = 0,
     type: u32,
     addend: i64 = 0,
     target: ?*const Symbol = null,
 };
 
 pub fn addRelaDyn(self: *Elf, opts: RelaDyn) !void {
     try self.rela_dyn.ensureUnusedCapacity(self.base.alloctor, 1);
     self.addRelaDynAssumeCapacity(opts);
 }
 
 pub fn addRelaDynAssumeCapacity(self: *Elf, opts: RelaDyn) void {
     relocs_log.debug("  {s}: [{x} => {d}({s})] + {x}", .{
         relocation.fmtRelocType(opts.type, self.getTarget().cpu.arch),
         opts.offset,
         opts.sym,
         if (opts.target) |sym| sym.name(self) else "",
         opts.addend,
     });
     self.rela_dyn.appendAssumeCapacity(.{
         .r_offset = opts.offset,
         .r_info = (opts.sym << 32) | opts.type,
         .r_addend = opts.addend,
     });
 }
 
 fn sortRelaDyn(self: *Elf) void {
     const Sort = struct {
         fn rank(rel: elf.Elf64_Rela, ctx: *Elf) u2 {
             const cpu_arch = ctx.getTarget().cpu.arch;
             const r_type = rel.r_type();
             const r_kind = relocation.decode(r_type, cpu_arch).?;
             return switch (r_kind) {
                 .rel => 0,
                 .irel => 2,
                 else => 1,
             };
         }
 
         pub fn lessThan(ctx: *Elf, lhs: elf.Elf64_Rela, rhs: elf.Elf64_Rela) bool {
             if (rank(lhs, ctx) == rank(rhs, ctx)) {
                 if (lhs.r_sym() == rhs.r_sym()) return lhs.r_offset < rhs.r_offset;
                 return lhs.r_sym() < rhs.r_sym();
             }
             return rank(lhs, ctx) < rank(rhs, ctx);
         }
     };
     mem.sort(elf.Elf64_Rela, self.rela_dyn.items, self, Sort.lessThan);
 }
 
 pub fn calcNumIRelativeRelocs(self: *Elf) usize {
     var count: usize = self.num_ifunc_dynrelocs;
 
     for (self.got.entries.items) |entry| {
         if (entry.tag != .got) continue;
         const sym = self.symbol(entry.ref).?;
         if (sym.isIFunc(self)) count += 1;
     }
 
     return count;
 }
 
 pub fn getStartStopBasename(self: Elf, shdr: elf.Elf64_Shdr) ?[]const u8 {
     const name = self.getShString(shdr.sh_name);
     if (shdr.sh_flags & elf.SHF_ALLOC != 0 and name.len > 0) {
         if (Elf.isCIdentifier(name)) return name;
     }
     return null;
 }
 
 pub fn isCIdentifier(name: []const u8) bool {
     if (name.len == 0) return false;
     const first_c = name[0];
     if (!std.ascii.isAlphabetic(first_c) and first_c != '_') return false;
     for (name[1..]) |c| {
         if (!std.ascii.isAlphanumeric(c) and c != '_') return false;
     }
     return true;
 }
 
 pub fn addThunk(self: *Elf) !Thunk.Index {
     const index = @as(Thunk.Index, @intCast(self.thunks.items.len));
     const th = try self.thunks.addOne(self.base.comp.gpa);
     th.* = .{};
     return index;
 }
 
 pub fn thunk(self: *Elf, index: Thunk.Index) *Thunk {
     assert(index < self.thunks.items.len);
     return &self.thunks.items[index];
 }
 
 pub fn file(self: *Elf, index: File.Index) ?File {
     const tag = self.files.items(.tags)[index];
     return switch (tag) {
         .null => null,
         .linker_defined => .{ .linker_defined = &self.files.items(.data)[index].linker_defined },
         .zig_object => .{ .zig_object = &self.files.items(.data)[index].zig_object },
         .object => .{ .object = &self.files.items(.data)[index].object },
         .shared_object => .{ .shared_object = &self.files.items(.data)[index].shared_object },
     };
 }
 
 pub fn addFileHandle(self: *Elf, handle: fs.File) !File.HandleIndex {
     const gpa = self.base.comp.gpa;
     const index: File.HandleIndex = @intCast(self.file_handles.items.len);
     const fh = try self.file_handles.addOne(gpa);
     fh.* = handle;
     return index;
 }
 
 pub fn fileHandle(self: Elf, index: File.HandleIndex) File.Handle {
     assert(index < self.file_handles.items.len);
     return self.file_handles.items[index];
 }
 
 pub fn atom(self: *Elf, ref: Ref) ?*Atom {
     const file_ptr = self.file(ref.file) orelse return null;
     return file_ptr.atom(ref.index);
 }
 
 pub fn comdatGroup(self: *Elf, ref: Ref) *ComdatGroup {
     return self.file(ref.file).?.comdatGroup(ref.index);
 }
 
 pub fn symbol(self: *Elf, ref: Ref) ?*Symbol {
     const file_ptr = self.file(ref.file) orelse return null;
     return file_ptr.symbol(ref.index);
 }
 
 pub fn getGlobalSymbol(self: *Elf, name: []const u8, lib_name: ?[]const u8) !u32 {
     return self.zigObjectPtr().?.getGlobalSymbol(self, name, lib_name);
 }
 
 pub fn zigObjectPtr(self: *Elf) ?*ZigObject {
     const index = self.zig_object_index orelse return null;
     return self.file(index).?.zig_object;
 }
 
 pub fn linkerDefinedPtr(self: *Elf) ?*LinkerDefined {
     const index = self.linker_defined_index orelse return null;
     return self.file(index).?.linker_defined;
 }
 
 pub fn getOrCreateMergeSection(self: *Elf, name: [:0]const u8, flags: u64, @"type": u32) !MergeSection.Index {
     const gpa = self.base.comp.gpa;
     const out_name = name: {
         if (self.base.isRelocatable()) break :name name;
         if (mem.eql(u8, name, ".rodata") or mem.startsWith(u8, name, ".rodata"))
             break :name if (flags & elf.SHF_STRINGS != 0) ".rodata.str" else ".rodata.cst";
         break :name name;
     };
     for (self.merge_sections.items, 0..) |msec, index| {
         if (mem.eql(u8, msec.name(self), out_name)) return @intCast(index);
     }
     const out_off = try self.insertShString(out_name);
     const out_flags = flags & ~@as(u64, elf.SHF_COMPRESSED | elf.SHF_GROUP);
     const index = @as(MergeSection.Index, @intCast(self.merge_sections.items.len));
     const msec = try self.merge_sections.addOne(gpa);
     msec.* = .{
         .name_offset = out_off,
         .flags = out_flags,
         .type = @"type",
     };
     return index;
 }
 
 pub fn mergeSection(self: *Elf, index: MergeSection.Index) *MergeSection {
     assert(index < self.merge_sections.items.len);
     return &self.merge_sections.items[index];
 }
 
 pub fn gotAddress(self: *Elf) i64 {
     const shndx = blk: {
         if (self.getTarget().cpu.arch == .x86_64 and self.got_plt_section_index != null)
             break :blk self.got_plt_section_index.?;
         break :blk if (self.got_section_index) |shndx| shndx else null;
     };
     return if (shndx) |index| @intCast(self.sections.items(.shdr)[index].sh_addr) else 0;
 }
 
 pub fn tpAddress(self: *Elf) i64 {
     const index = self.phdr_tls_index orelse return 0;
     const phdr = self.phdrs.items[index];
     const addr = switch (self.getTarget().cpu.arch) {
         .x86_64 => mem.alignForward(u64, phdr.p_vaddr + phdr.p_memsz, phdr.p_align),
         .aarch64 => mem.alignBackward(u64, phdr.p_vaddr - 16, phdr.p_align),
         .riscv64 => phdr.p_vaddr,
         else => |arch| std.debug.panic("TODO implement getTpAddress for {s}", .{@tagName(arch)}),
     };
     return @intCast(addr);
 }
 
 pub fn dtpAddress(self: *Elf) i64 {
     const index = self.phdr_tls_index orelse return 0;
     const phdr = self.phdrs.items[index];
     return @intCast(phdr.p_vaddr);
 }
 
 pub fn tlsAddress(self: *Elf) i64 {
     const index = self.phdr_tls_index orelse return 0;
     const phdr = self.phdrs.items[index];
     return @intCast(phdr.p_vaddr);
 }
 
 pub fn getShString(self: Elf, off: u32) [:0]const u8 {
     assert(off < self.shstrtab.items.len);
     return mem.sliceTo(@as([*:0]const u8, @ptrCast(self.shstrtab.items.ptr + off)), 0);
 }
 
 pub fn insertShString(self: *Elf, name: [:0]const u8) error{OutOfMemory}!u32 {
     const gpa = self.base.comp.gpa;
     const off = @as(u32, @intCast(self.shstrtab.items.len));
     try self.shstrtab.ensureUnusedCapacity(gpa, name.len + 1);
     self.shstrtab.writer(gpa).print("{s}\x00", .{name}) catch unreachable;
     return off;
 }
 
 pub fn getDynString(self: Elf, off: u32) [:0]const u8 {
     assert(off < self.dynstrtab.items.len);
     return mem.sliceTo(@as([*:0]const u8, @ptrCast(self.dynstrtab.items.ptr + off)), 0);
 }
 
 pub fn insertDynString(self: *Elf, name: []const u8) error{OutOfMemory}!u32 {
     const gpa = self.base.comp.gpa;
     const off = @as(u32, @intCast(self.dynstrtab.items.len));
     try self.dynstrtab.ensureUnusedCapacity(gpa, name.len + 1);
     self.dynstrtab.writer(gpa).print("{s}\x00", .{name}) catch unreachable;
     return off;
 }
 
 fn reportUndefinedSymbols(self: *Elf, undefs: anytype) !void {
     const gpa = self.base.comp.gpa;
     const max_notes = 4;
 
     try self.base.comp.link_errors.ensureUnusedCapacity(gpa, undefs.count());
 
     for (undefs.keys(), undefs.values()) |key, refs| {
         const undef_sym = self.resolver.keys.items[key - 1];
         const nrefs = @min(refs.items.len, max_notes);
         const nnotes = nrefs + @intFromBool(refs.items.len > max_notes);
 
         var err = try self.base.addErrorWithNotesAssumeCapacity(nnotes);
         try err.addMsg("undefined symbol: {s}", .{undef_sym.name(self)});
 
         for (refs.items[0..nrefs]) |ref| {
             const atom_ptr = self.atom(ref).?;
             const file_ptr = atom_ptr.file(self).?;
             try err.addNote("referenced by {s}:{s}", .{ file_ptr.fmtPath(), atom_ptr.name(self) });
         }
 
         if (refs.items.len > max_notes) {
             const remaining = refs.items.len - max_notes;
             try err.addNote("referenced {d} more times", .{remaining});
         }
     }
 }
 
 fn reportDuplicates(self: *Elf, dupes: anytype) error{ HasDuplicates, OutOfMemory }!void {
     if (dupes.keys().len == 0) return; // Nothing to do
 
     const max_notes = 3;
 
     for (dupes.keys(), dupes.values()) |key, notes| {
         const sym = self.resolver.keys.items[key - 1];
         const nnotes = @min(notes.items.len, max_notes) + @intFromBool(notes.items.len > max_notes);
 
         var err = try self.base.addErrorWithNotes(nnotes + 1);
         try err.addMsg("duplicate symbol definition: {s}", .{sym.name(self)});
         try err.addNote("defined by {}", .{sym.file(self).?.fmtPath()});
 
         var inote: usize = 0;
         while (inote < @min(notes.items.len, max_notes)) : (inote += 1) {
             const file_ptr = self.file(notes.items[inote]).?;
             try err.addNote("defined by {}", .{file_ptr.fmtPath()});
         }
 
         if (notes.items.len > max_notes) {
             const remaining = notes.items.len - max_notes;
             try err.addNote("defined {d} more times", .{remaining});
         }
     }
 
     return error.HasDuplicates;
 }
 
 fn reportMissingLibraryError(
     self: *Elf,
     checked_paths: []const []const u8,
     comptime format: []const u8,
     args: anytype,
 ) error{OutOfMemory}!void {
     var err = try self.base.addErrorWithNotes(checked_paths.len);
     try err.addMsg(format, args);
     for (checked_paths) |path| {
         try err.addNote("tried {s}", .{path});
     }
 }
 
 fn reportUnsupportedCpuArch(self: *Elf) error{OutOfMemory}!void {
     var err = try self.base.addErrorWithNotes(0);
     try err.addMsg("fatal linker error: unsupported CPU architecture {s}", .{
         @tagName(self.getTarget().cpu.arch),
     });
 }
 
 pub fn addParseError(
     self: *Elf,
     path: []const u8,
     comptime format: []const u8,
     args: anytype,
 ) error{OutOfMemory}!void {
     var err = try self.base.addErrorWithNotes(1);
     try err.addMsg(format, args);
     try err.addNote("while parsing {s}", .{path});
 }
 
 pub fn addFileError(
     self: *Elf,
     file_index: File.Index,
     comptime format: []const u8,
     args: anytype,
 ) error{OutOfMemory}!void {
     var err = try self.base.addErrorWithNotes(1);
     try err.addMsg(format, args);
     try err.addNote("while parsing {}", .{self.file(file_index).?.fmtPath()});
 }
 
 pub fn failFile(
     self: *Elf,
     file_index: File.Index,
     comptime format: []const u8,
     args: anytype,
 ) error{ OutOfMemory, LinkFailure } {
     try addFileError(self, file_index, format, args);
     return error.LinkFailure;
 }
 
 pub fn failParse(
     self: *Elf,
     path: []const u8,
     comptime format: []const u8,
     args: anytype,
 ) error{ OutOfMemory, LinkFailure } {
     try addParseError(self, path, format, args);
     return error.LinkFailure;
 }
 
 const FormatShdrCtx = struct {
     elf_file: *Elf,
     shdr: elf.Elf64_Shdr,
 };
 
 fn fmtShdr(self: *Elf, shdr: elf.Elf64_Shdr) std.fmt.Formatter(formatShdr) {
     return .{ .data = .{
         .shdr = shdr,
         .elf_file = self,
     } };
 }
 
 fn formatShdr(
     ctx: FormatShdrCtx,
     comptime unused_fmt_string: []const u8,
     options: std.fmt.FormatOptions,
     writer: anytype,
 ) !void {
     _ = options;
     _ = unused_fmt_string;
     const shdr = ctx.shdr;
     try writer.print("{s} : @{x} ({x}) : align({x}) : size({x}) : entsize({x}) : flags({})", .{
         ctx.elf_file.getShString(shdr.sh_name), shdr.sh_offset,
         shdr.sh_addr,                           shdr.sh_addralign,
         shdr.sh_size,                           shdr.sh_entsize,
         fmtShdrFlags(shdr.sh_flags),
     });
 }
 
 pub fn fmtShdrFlags(sh_flags: u64) std.fmt.Formatter(formatShdrFlags) {
     return .{ .data = sh_flags };
 }
 
 fn formatShdrFlags(
     sh_flags: u64,
     comptime unused_fmt_string: []const u8,
     options: std.fmt.FormatOptions,
     writer: anytype,
 ) !void {
     _ = unused_fmt_string;
     _ = options;
     if (elf.SHF_WRITE & sh_flags != 0) {
         try writer.writeAll("W");
     }
     if (elf.SHF_ALLOC & sh_flags != 0) {
         try writer.writeAll("A");
     }
     if (elf.SHF_EXECINSTR & sh_flags != 0) {
         try writer.writeAll("X");
     }
     if (elf.SHF_MERGE & sh_flags != 0) {
         try writer.writeAll("M");
     }
     if (elf.SHF_STRINGS & sh_flags != 0) {
         try writer.writeAll("S");
     }
     if (elf.SHF_INFO_LINK & sh_flags != 0) {
         try writer.writeAll("I");
     }
     if (elf.SHF_LINK_ORDER & sh_flags != 0) {
         try writer.writeAll("L");
     }
     if (elf.SHF_EXCLUDE & sh_flags != 0) {
         try writer.writeAll("E");
     }
     if (elf.SHF_COMPRESSED & sh_flags != 0) {
         try writer.writeAll("C");
     }
     if (elf.SHF_GROUP & sh_flags != 0) {
         try writer.writeAll("G");
     }
     if (elf.SHF_OS_NONCONFORMING & sh_flags != 0) {
         try writer.writeAll("O");
     }
     if (elf.SHF_TLS & sh_flags != 0) {
         try writer.writeAll("T");
     }
     if (elf.SHF_X86_64_LARGE & sh_flags != 0) {
         try writer.writeAll("l");
     }
     if (elf.SHF_MIPS_ADDR & sh_flags != 0 or elf.SHF_ARM_PURECODE & sh_flags != 0) {
         try writer.writeAll("p");
     }
 }
 
 const FormatPhdrCtx = struct {
     elf_file: *Elf,
     phdr: elf.Elf64_Phdr,
 };
 
 fn fmtPhdr(self: *Elf, phdr: elf.Elf64_Phdr) std.fmt.Formatter(formatPhdr) {
     return .{ .data = .{
         .phdr = phdr,
         .elf_file = self,
     } };
 }
 
 fn formatPhdr(
     ctx: FormatPhdrCtx,
     comptime unused_fmt_string: []const u8,
     options: std.fmt.FormatOptions,
     writer: anytype,
 ) !void {
     _ = options;
     _ = unused_fmt_string;
     const phdr = ctx.phdr;
     const write = phdr.p_flags & elf.PF_W != 0;
     const read = phdr.p_flags & elf.PF_R != 0;
     const exec = phdr.p_flags & elf.PF_X != 0;
     var flags: [3]u8 = [_]u8{'_'} ** 3;
     if (exec) flags[0] = 'X';
     if (write) flags[1] = 'W';
     if (read) flags[2] = 'R';
     const p_type = switch (phdr.p_type) {
         elf.PT_LOAD => "LOAD",
         elf.PT_TLS => "TLS",
         elf.PT_GNU_EH_FRAME => "GNU_EH_FRAME",
         elf.PT_GNU_STACK => "GNU_STACK",
         elf.PT_DYNAMIC => "DYNAMIC",
         elf.PT_INTERP => "INTERP",
         elf.PT_NULL => "NULL",
         elf.PT_PHDR => "PHDR",
         elf.PT_NOTE => "NOTE",
         else => "UNKNOWN",
     };
     try writer.print("{s} : {s} : @{x} ({x}) : align({x}) : filesz({x}) : memsz({x})", .{
         p_type,       flags,         phdr.p_offset, phdr.p_vaddr,
         phdr.p_align, phdr.p_filesz, phdr.p_memsz,
     });
 }
 
 pub fn dumpState(self: *Elf) std.fmt.Formatter(fmtDumpState) {
     return .{ .data = self };
 }
 
 fn fmtDumpState(
     self: *Elf,
     comptime unused_fmt_string: []const u8,
     options: std.fmt.FormatOptions,
     writer: anytype,
 ) !void {
     _ = unused_fmt_string;
     _ = options;
 
     if (self.zigObjectPtr()) |zig_object| {
         try writer.print("zig_object({d}) : {s}\n", .{ zig_object.index, zig_object.path });
         try writer.print("{}{}", .{
             zig_object.fmtAtoms(self),
             zig_object.fmtSymtab(self),
         });
         try writer.writeByte('\n');
     }
 
     for (self.objects.items) |index| {
         const object = self.file(index).?.object;
         try writer.print("object({d}) : {}", .{ index, object.fmtPath() });
         if (!object.alive) try writer.writeAll(" : [*]");
         try writer.writeByte('\n');
         try writer.print("{}{}{}{}{}\n", .{
             object.fmtAtoms(self),
             object.fmtCies(self),
             object.fmtFdes(self),
             object.fmtSymtab(self),
             object.fmtComdatGroups(self),
         });
     }
 
     for (self.shared_objects.items) |index| {
         const shared_object = self.file(index).?.shared_object;
         try writer.print("shared_object({d}) : ", .{index});
         try writer.print("{s}", .{shared_object.path});
         try writer.print(" : needed({})", .{shared_object.needed});
         if (!shared_object.alive) try writer.writeAll(" : [*]");
         try writer.writeByte('\n');
         try writer.print("{}\n", .{shared_object.fmtSymtab(self)});
     }
 
     if (self.linker_defined_index) |index| {
         const linker_defined = self.file(index).?.linker_defined;
         try writer.print("linker_defined({d}) : (linker defined)\n", .{index});
         try writer.print("{}\n", .{linker_defined.fmtSymtab(self)});
     }
 
     const slice = self.sections.slice();
     {
         try writer.writeAll("atom lists\n");
         for (slice.items(.shdr), slice.items(.atom_list_2), 0..) |shdr, atom_list, shndx| {
             try writer.print("shdr({d}) : {s} : {}\n", .{ shndx, self.getShString(shdr.sh_name), atom_list.fmt(self) });
         }
     }
 
     if (self.requiresThunks()) {
         try writer.writeAll("thunks\n");
         for (self.thunks.items, 0..) |th, index| {
             try writer.print("thunk({d}) : {}\n", .{ index, th.fmt(self) });
         }
     }
 
     try writer.print("{}\n", .{self.got.fmt(self)});
     try writer.print("{}\n", .{self.plt.fmt(self)});
 
     try writer.writeAll("Output COMDAT groups\n");
     for (self.comdat_group_sections.items) |cg| {
         try writer.print("  shdr({d}) : COMDAT({})\n", .{ cg.shndx, cg.cg_ref });
     }
 
     try writer.writeAll("\nOutput merge sections\n");
     for (self.merge_sections.items) |msec| {
         try writer.print("  shdr({d}) : {}\n", .{ msec.output_section_index, msec.fmt(self) });
     }
 
     try writer.writeAll("\nOutput shdrs\n");
     for (slice.items(.shdr), slice.items(.phndx), 0..) |shdr, phndx, shndx| {
         try writer.print("  shdr({d}) : phdr({?d}) : {}\n", .{
             shndx,
             phndx,
             self.fmtShdr(shdr),
         });
     }
     try writer.writeAll("\nOutput phdrs\n");
     for (self.phdrs.items, 0..) |phdr, phndx| {
         try writer.print("  phdr({d}) : {}\n", .{ phndx, self.fmtPhdr(phdr) });
     }
 }
 
 /// Caller owns the memory.
 pub fn preadAllAlloc(allocator: Allocator, handle: fs.File, offset: u64, size: u64) ![]u8 {
     const buffer = try allocator.alloc(u8, math.cast(usize, size) orelse return error.Overflow);
     errdefer allocator.free(buffer);
     const amt = try handle.preadAll(buffer, offset);
     if (amt != size) return error.InputOutput;
     return buffer;
 }
 
 /// Binary search
 pub fn bsearch(comptime T: type, haystack: []align(1) const T, predicate: anytype) usize {
     if (!@hasDecl(@TypeOf(predicate), "predicate"))
         @compileError("Predicate is required to define fn predicate(@This(), T) bool");
 
     var min: usize = 0;
     var max: usize = haystack.len;
     while (min < max) {
         const index = (min + max) / 2;
         const curr = haystack[index];
         if (predicate.predicate(curr)) {
             min = index + 1;
         } else {
             max = index;
         }
     }
     return min;
 }
 
 /// Linear search
 pub fn lsearch(comptime T: type, haystack: []align(1) const T, predicate: anytype) usize {
     if (!@hasDecl(@TypeOf(predicate), "predicate"))
         @compileError("Predicate is required to define fn predicate(@This(), T) bool");
 
     var i: usize = 0;
     while (i < haystack.len) : (i += 1) {
         if (predicate.predicate(haystack[i])) break;
     }
     return i;
 }
 
 pub fn getTarget(self: Elf) std.Target {
     return self.base.comp.root_mod.resolved_target.result;
 }
 
 fn requiresThunks(self: Elf) bool {
     return switch (self.getTarget().cpu.arch) {
         .aarch64 => true,
         .x86_64, .riscv64 => false,
         else => @panic("TODO unimplemented architecture"),
     };
 }
 
 /// The following three values are only observed at compile-time and used to emit a compile error
 /// to remind the programmer to update expected maximum numbers of different program header types
 /// so that we reserve enough space for the program header table up-front.
 /// Bump these numbers when adding or deleting a Zig specific pre-allocated segment, or adding
 /// more special-purpose program headers.
 const max_number_of_object_segments = 9;
 const max_number_of_special_phdrs = 5;
 
 const default_entry_addr = 0x8000000;
 
 pub const base_tag: link.File.Tag = .elf;
 
 pub const ComdatGroup = struct {
     signature_off: u32,
     file_index: File.Index,
     shndx: u32,
     members_start: u32,
     members_len: u32,
     alive: bool = true,
 
     pub fn file(cg: ComdatGroup, elf_file: *Elf) File {
         return elf_file.file(cg.file_index).?;
     }
 
     pub fn signature(cg: ComdatGroup, elf_file: *Elf) [:0]const u8 {
         return cg.file(elf_file).object.getString(cg.signature_off);
     }
 
     pub fn comdatGroupMembers(cg: ComdatGroup, elf_file: *Elf) []const u32 {
         const object = cg.file(elf_file).object;
         return object.comdat_group_data.items[cg.members_start..][0..cg.members_len];
     }
 
     pub const Index = u32;
 };
 
 pub const SymtabCtx = struct {
     ilocal: u32 = 0,
     iglobal: u32 = 0,
     nlocals: u32 = 0,
     nglobals: u32 = 0,
     strsize: u32 = 0,
 
     pub fn reset(ctx: *SymtabCtx) void {
         ctx.ilocal = 0;
         ctx.iglobal = 0;
         ctx.nlocals = 0;
         ctx.nglobals = 0;
         ctx.strsize = 0;
     }
 };
 
 pub const null_sym = elf.Elf64_Sym{
     .st_name = 0,
     .st_info = 0,
     .st_other = 0,
     .st_shndx = 0,
     .st_value = 0,
     .st_size = 0,
 };
 
 pub const null_shdr = elf.Elf64_Shdr{
     .sh_name = 0,
     .sh_type = 0,
     .sh_flags = 0,
     .sh_addr = 0,
     .sh_offset = 0,
     .sh_size = 0,
     .sh_link = 0,
     .sh_info = 0,
     .sh_addralign = 0,
     .sh_entsize = 0,
 };
 
 pub const SystemLib = struct {
     needed: bool = false,
     path: []const u8,
 };
 
 pub const Ref = struct {
     index: u32 = 0,
     file: u32 = 0,
 
     pub fn eql(ref: Ref, other: Ref) bool {
         return ref.index == other.index and ref.file == other.file;
     }
 
     pub fn format(
         ref: Ref,
         comptime unused_fmt_string: []const u8,
         options: std.fmt.FormatOptions,
         writer: anytype,
     ) !void {
         _ = unused_fmt_string;
         _ = options;
         try writer.print("ref({},{})", .{ ref.index, ref.file });
     }
 };
 
 pub const SymbolResolver = struct {
     keys: std.ArrayListUnmanaged(Key) = .empty,
     values: std.ArrayListUnmanaged(Ref) = .empty,
     table: std.AutoArrayHashMapUnmanaged(void, void) = .empty,
 
     const Result = struct {
         found_existing: bool,
         index: Index,
         ref: *Ref,
     };
 
     pub fn deinit(resolver: *SymbolResolver, allocator: Allocator) void {
         resolver.keys.deinit(allocator);
         resolver.values.deinit(allocator);
         resolver.table.deinit(allocator);
     }
 
     pub fn getOrPut(
         resolver: *SymbolResolver,
         allocator: Allocator,
         ref: Ref,
         elf_file: *Elf,
     ) !Result {
         const adapter = Adapter{ .keys = resolver.keys.items, .elf_file = elf_file };
         const key = Key{ .index = ref.index, .file_index = ref.file };
         const gop = try resolver.table.getOrPutAdapted(allocator, key, adapter);
         if (!gop.found_existing) {
             try resolver.keys.append(allocator, key);
             _ = try resolver.values.addOne(allocator);
         }
         return .{
             .found_existing = gop.found_existing,
             .index = @intCast(gop.index + 1),
             .ref = &resolver.values.items[gop.index],
         };
     }
 
     pub fn get(resolver: SymbolResolver, index: Index) ?Ref {
         if (index == 0) return null;
         return resolver.values.items[index - 1];
     }
 
     pub fn reset(resolver: *SymbolResolver) void {
         resolver.keys.clearRetainingCapacity();
         resolver.values.clearRetainingCapacity();
         resolver.table.clearRetainingCapacity();
     }
 
     const Key = struct {
         index: Symbol.Index,
         file_index: File.Index,
 
         fn name(key: Key, elf_file: *Elf) [:0]const u8 {
             const ref = Ref{ .index = key.index, .file = key.file_index };
             return elf_file.symbol(ref).?.name(elf_file);
         }
 
         fn file(key: Key, elf_file: *Elf) ?File {
             return elf_file.file(key.file_index);
         }
 
         fn eql(key: Key, other: Key, elf_file: *Elf) bool {
             const key_name = key.name(elf_file);
             const other_name = other.name(elf_file);
             return mem.eql(u8, key_name, other_name);
         }
 
         fn hash(key: Key, elf_file: *Elf) u32 {
             return @truncate(Hash.hash(0, key.name(elf_file)));
         }
     };
 
     const Adapter = struct {
         keys: []const Key,
         elf_file: *Elf,
 
         pub fn eql(ctx: @This(), key: Key, b_void: void, b_map_index: usize) bool {
             _ = b_void;
             const other = ctx.keys[b_map_index];
             return key.eql(other, ctx.elf_file);
         }
 
         pub fn hash(ctx: @This(), key: Key) u32 {
             return key.hash(ctx.elf_file);
         }
     };
 
     pub const Index = u32;
 };
 
 const Section = struct {
     /// Section header.
     shdr: elf.Elf64_Shdr,
 
     /// Assigned program header index if any.
     phndx: ?u32 = null,
 
     /// List of atoms contributing to this section.
     /// TODO currently this is only used for relocations tracking in relocatable mode
     /// but will be merged with atom_list_2.
     atom_list: std.ArrayListUnmanaged(Ref) = .empty,
 
     /// List of atoms contributing to this section.
     /// This can be used by sections that require special handling such as init/fini array, etc.
     atom_list_2: AtomList = .{},
 
     /// Index of the last allocated atom in this section.
     last_atom: Ref = .{ .index = 0, .file = 0 },
 
     /// A list of atoms that have surplus capacity. This list can have false
     /// positives, as functions grow and shrink over time, only sometimes being added
     /// or removed from the freelist.
     ///
     /// An atom has surplus capacity when its overcapacity value is greater than
     /// padToIdeal(minimum_atom_size). That is, when it has so
     /// much extra capacity, that we could fit a small new symbol in it, itself with
     /// ideal_capacity or more.
     ///
     /// Ideal capacity is defined by size + (size / ideal_factor)
     ///
     /// Overcapacity is measured by actual_capacity - ideal_capacity. Note that
     /// overcapacity can be negative. A simple way to have negative overcapacity is to
     /// allocate a fresh text block, which will have ideal capacity, and then grow it
     /// by 1 byte. It will then have -1 overcapacity.
     free_list: std.ArrayListUnmanaged(Ref) = .empty,
 };
 
 pub fn sectionSize(self: *Elf, shndx: u32) u64 {
     const last_atom_ref = self.sections.items(.last_atom)[shndx];
     const atom_ptr = self.atom(last_atom_ref) orelse return 0;
     return @as(u64, @intCast(atom_ptr.value)) + atom_ptr.size;
 }
 
 fn defaultEntrySymbolName(cpu_arch: std.Target.Cpu.Arch) []const u8 {
     return switch (cpu_arch) {
         .mips, .mipsel, .mips64, .mips64el => "__start",
         else => "_start",
     };
 }
 
 fn createThunks(elf_file: *Elf, atom_list: *AtomList) !void {
     const gpa = elf_file.base.comp.gpa;
     const cpu_arch = elf_file.getTarget().cpu.arch;
 
     // A branch will need an extender if its target is larger than
     // `2^(jump_bits - 1) - margin` where margin is some arbitrary number.
     const max_distance = switch (cpu_arch) {
         .aarch64 => 0x500_000,
         .x86_64, .riscv64 => unreachable,
         else => @panic("unhandled arch"),
     };
 
     const advance = struct {
         fn advance(list: *AtomList, size: u64, alignment: Atom.Alignment) !i64 {
             const offset = alignment.forward(list.size);
             const padding = offset - list.size;
             list.size += padding + size;
             list.alignment = list.alignment.max(alignment);
             return @intCast(offset);
         }
     }.advance;
 
     for (atom_list.atoms.keys()) |ref| {
         elf_file.atom(ref).?.value = -1;
     }
 
     var i: usize = 0;
     while (i < atom_list.atoms.keys().len) {
         const start = i;
         const start_atom = elf_file.atom(atom_list.atoms.keys()[start]).?;
         assert(start_atom.alive);
         start_atom.value = try advance(atom_list, start_atom.size, start_atom.alignment);
         i += 1;
 
         while (i < atom_list.atoms.keys().len) : (i += 1) {
             const atom_ptr = elf_file.atom(atom_list.atoms.keys()[i]).?;
             assert(atom_ptr.alive);
             if (@as(i64, @intCast(atom_ptr.alignment.forward(atom_list.size))) - start_atom.value >= max_distance)
                 break;
             atom_ptr.value = try advance(atom_list, atom_ptr.size, atom_ptr.alignment);
         }
 
         // Insert a thunk at the group end
         const thunk_index = try elf_file.addThunk();
         const thunk_ptr = elf_file.thunk(thunk_index);
         thunk_ptr.output_section_index = atom_list.output_section_index;
 
         // Scan relocs in the group and create trampolines for any unreachable callsite
         for (atom_list.atoms.keys()[start..i]) |ref| {
             const atom_ptr = elf_file.atom(ref).?;
             const file_ptr = atom_ptr.file(elf_file).?;
             log.debug("atom({}) {s}", .{ ref, atom_ptr.name(elf_file) });
             for (atom_ptr.relocs(elf_file)) |rel| {
                 const is_reachable = switch (cpu_arch) {
                     .aarch64 => r: {
                         const r_type: elf.R_AARCH64 = @enumFromInt(rel.r_type());
                         if (r_type != .CALL26 and r_type != .JUMP26) break :r true;
                         const target_ref = file_ptr.resolveSymbol(rel.r_sym(), elf_file);
                         const target = elf_file.symbol(target_ref).?;
                         if (target.flags.has_plt) break :r false;
                         if (atom_ptr.output_section_index != target.output_section_index) break :r false;
                         const target_atom = target.atom(elf_file).?;
                         if (target_atom.value == -1) break :r false;
                         const saddr = atom_ptr.address(elf_file) + @as(i64, @intCast(rel.r_offset));
                         const taddr = target.address(.{}, elf_file);
                         _ = math.cast(i28, taddr + rel.r_addend - saddr) orelse break :r false;
                         break :r true;
                     },
                     .x86_64, .riscv64 => unreachable,
                     else => @panic("unsupported arch"),
                 };
                 if (is_reachable) continue;
                 const target = file_ptr.resolveSymbol(rel.r_sym(), elf_file);
                 try thunk_ptr.symbols.put(gpa, target, {});
             }
             atom_ptr.addExtra(.{ .thunk = thunk_index }, elf_file);
         }
 
         thunk_ptr.value = try advance(atom_list, thunk_ptr.size(elf_file), Atom.Alignment.fromNonzeroByteUnits(2));
 
         log.debug("thunk({d}) : {}", .{ thunk_index, thunk_ptr.fmt(elf_file) });
     }
 }
 
 const std = @import("std");
 const build_options = @import("build_options");
 const builtin = @import("builtin");
 const assert = std.debug.assert;
 const elf = std.elf;
 const fs = std.fs;
 const log = std.log.scoped(.link);
 const relocs_log = std.log.scoped(.link_relocs);
 const state_log = std.log.scoped(.link_state);
 const math = std.math;
 const mem = std.mem;
 
 const codegen = @import("../codegen.zig");
 const dev = @import("../dev.zig");
 const eh_frame = @import("Elf/eh_frame.zig");
 const gc = @import("Elf/gc.zig");
 const glibc = @import("../glibc.zig");
 const link = @import("../link.zig");
 const merge_section = @import("Elf/merge_section.zig");
 const musl = @import("../musl.zig");
 const relocatable = @import("Elf/relocatable.zig");
 const relocation = @import("Elf/relocation.zig");
 const target_util = @import("../target.zig");
 const trace = @import("../tracy.zig").trace;
 const synthetic_sections = @import("Elf/synthetic_sections.zig");
 
 const Air = @import("../Air.zig");
 const Allocator = std.mem.Allocator;
 const Archive = @import("Elf/Archive.zig");
 pub const Atom = @import("Elf/Atom.zig");
 const AtomList = @import("Elf/AtomList.zig");
 const Cache = std.Build.Cache;
 const Path = Cache.Path;
 const Compilation = @import("../Compilation.zig");
 const ComdatGroupSection = synthetic_sections.ComdatGroupSection;
 const CopyRelSection = synthetic_sections.CopyRelSection;
 const DynamicSection = synthetic_sections.DynamicSection;
 const DynsymSection = synthetic_sections.DynsymSection;
 const Dwarf = @import("Dwarf.zig");
 const Elf = @This();
 const File = @import("Elf/file.zig").File;
 const GnuHashSection = synthetic_sections.GnuHashSection;
 const GotSection = synthetic_sections.GotSection;
 const GotPltSection = synthetic_sections.GotPltSection;
 const Hash = std.hash.Wyhash;
 const HashSection = synthetic_sections.HashSection;
 const InputMergeSection = merge_section.InputMergeSection;
 const LdScript = @import("Elf/LdScript.zig");
 const LinkerDefined = @import("Elf/LinkerDefined.zig");
 const Liveness = @import("../Liveness.zig");
 const LlvmObject = @import("../codegen/llvm.zig").Object;
 const MergeSection = merge_section.MergeSection;
 const MergeSubsection = merge_section.MergeSubsection;
 const Zcu = @import("../Zcu.zig");
 const Object = @import("Elf/Object.zig");
 const InternPool = @import("../InternPool.zig");
 const PltSection = synthetic_sections.PltSection;
 const PltGotSection = synthetic_sections.PltGotSection;
 const SharedObject = @import("Elf/SharedObject.zig");
 const Symbol = @import("Elf/Symbol.zig");
 const StringTable = @import("StringTable.zig");
 const Thunk = @import("Elf/Thunk.zig");
 const Value = @import("../Value.zig");
 const VerneedSection = synthetic_sections.VerneedSection;
 const ZigObject = @import("Elf/ZigObject.zig");
 const riscv = @import("riscv.zig");