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pub const File = union(enum) {
zig_object: *ZigObject,
internal: *InternalObject,
object: *Object,
dylib: *Dylib,
pub fn getIndex(file: File) Index {
return switch (file) {
inline else => |x| x.index,
};
}
pub fn fmtPath(file: File) std.fmt.Formatter(formatPath) {
return .{ .data = file };
}
fn formatPath(
file: File,
comptime unused_fmt_string: []const u8,
options: std.fmt.FormatOptions,
writer: anytype,
) !void {
_ = unused_fmt_string;
_ = options;
switch (file) {
.zig_object => |x| try writer.writeAll(x.path),
.internal => try writer.writeAll(""),
.object => |x| try writer.print("{}", .{x.fmtPath()}),
.dylib => |x| try writer.writeAll(x.path),
}
}
pub fn resolveSymbols(file: File, macho_file: *MachO) void {
switch (file) {
inline else => |x| x.resolveSymbols(macho_file),
}
}
pub fn scanRelocs(file: File, macho_file: *MachO) !void {
switch (file) {
.dylib => unreachable,
.internal => |x| x.scanRelocs(macho_file),
inline else => |x| x.scanRelocs(macho_file),
}
}
/// Encodes symbol rank so that the following ordering applies:
/// * strong in object
/// * weak in object
/// * tentative in object
/// * strong in archive/dylib
/// * weak in archive/dylib
/// * tentative in archive
/// * unclaimed
pub fn getSymbolRank(file: File, args: struct {
archive: bool = false,
weak: bool = false,
tentative: bool = false,
}) u32 {
if (file == .object and !args.archive) {
const base: u32 = blk: {
if (args.tentative) break :blk 3;
break :blk if (args.weak) 2 else 1;
};
return (base << 16) + file.getIndex();
}
const base: u32 = blk: {
if (args.tentative) break :blk 3;
break :blk if (args.weak) 2 else 1;
};
return base + (file.getIndex() << 24);
}
pub fn getAtom(file: File, atom_index: Atom.Index) ?*Atom {
return switch (file) {
.dylib => unreachable,
inline else => |x| x.getAtom(atom_index),
};
}
pub fn getAtoms(file: File) []const Atom.Index {
return switch (file) {
.dylib => unreachable,
inline else => |x| x.getAtoms(),
};
}
pub fn addAtomExtra(file: File, allocator: Allocator, extra: Atom.Extra) !u32 {
return switch (file) {
.dylib => unreachable,
inline else => |x| x.addAtomExtra(allocator, extra),
};
}
pub fn getAtomExtra(file: File, index: u32) Atom.Extra {
return switch (file) {
.dylib => unreachable,
inline else => |x| x.getAtomExtra(index),
};
}
pub fn setAtomExtra(file: File, index: u32, extra: Atom.Extra) void {
return switch (file) {
.dylib => unreachable,
inline else => |x| x.setAtomExtra(index, extra),
};
}
pub fn getSymbols(file: File) []Symbol {
return switch (file) {
inline else => |x| x.symbols.items,
};
}
pub fn getSymbolRef(file: File, sym_index: Symbol.Index, macho_file: *MachO) MachO.Ref {
return switch (file) {
inline else => |x| x.getSymbolRef(sym_index, macho_file),
};
}
pub fn markImportsExports(file: File, macho_file: *MachO) void {
const nsyms = switch (file) {
.dylib => unreachable,
inline else => |x| x.symbols.items.len,
};
for (0..nsyms) |i| {
const ref = file.getSymbolRef(@intCast(i), macho_file);
if (ref.getFile(macho_file) == null) continue;
const sym = ref.getSymbol(macho_file).?;
if (sym.visibility != .global) continue;
if (sym.getFile(macho_file).? == .dylib and !sym.flags.abs) {
sym.flags.import = true;
continue;
}
if (file.getIndex() == ref.file) {
sym.flags.@"export" = true;
}
}
}
pub fn createSymbolIndirection(file: File, macho_file: *MachO) !void {
const nsyms = switch (file) {
inline else => |x| x.symbols.items.len,
};
for (0..nsyms) |i| {
const ref = file.getSymbolRef(@intCast(i), macho_file);
if (ref.getFile(macho_file) == null) continue;
if (ref.file != file.getIndex()) continue;
const sym = ref.getSymbol(macho_file).?;
if (sym.getSectionFlags().got) {
log.debug("'{s}' needs GOT", .{sym.getName(macho_file)});
try macho_file.got.addSymbol(ref, macho_file);
}
if (sym.getSectionFlags().stubs) {
log.debug("'{s}' needs STUBS", .{sym.getName(macho_file)});
try macho_file.stubs.addSymbol(ref, macho_file);
}
if (sym.getSectionFlags().tlv_ptr) {
log.debug("'{s}' needs TLV pointer", .{sym.getName(macho_file)});
try macho_file.tlv_ptr.addSymbol(ref, macho_file);
}
if (sym.getSectionFlags().objc_stubs) {
log.debug("'{s}' needs OBJC STUBS", .{sym.getName(macho_file)});
try macho_file.objc_stubs.addSymbol(ref, macho_file);
}
}
}
pub fn initOutputSections(file: File, macho_file: *MachO) !void {
const tracy = trace(@src());
defer tracy.end();
for (file.getAtoms()) |atom_index| {
const atom = file.getAtom(atom_index) orelse continue;
if (!atom.alive.load(.seq_cst)) continue;
atom.out_n_sect = try Atom.initOutputSection(atom.getInputSection(macho_file), macho_file);
}
}
pub fn dedupLiterals(file: File, lp: MachO.LiteralPool, macho_file: *MachO) void {
return switch (file) {
.dylib => unreachable,
inline else => |x| x.dedupLiterals(lp, macho_file),
};
}
pub fn writeAtoms(file: File, macho_file: *MachO) !void {
return switch (file) {
.dylib => unreachable,
inline else => |x| x.writeAtoms(macho_file),
};
}
pub fn calcSymtabSize(file: File, macho_file: *MachO) !void {
return switch (file) {
inline else => |x| x.calcSymtabSize(macho_file),
};
}
pub fn writeSymtab(file: File, macho_file: *MachO, ctx: anytype) !void {
return switch (file) {
inline else => |x| x.writeSymtab(macho_file, ctx),
};
}
pub fn updateArSymtab(file: File, ar_symtab: *Archive.ArSymtab, macho_file: *MachO) error{OutOfMemory}!void {
return switch (file) {
.dylib, .internal => unreachable,
inline else => |x| x.updateArSymtab(ar_symtab, macho_file),
};
}
pub fn updateArSize(file: File, macho_file: *MachO) !void {
return switch (file) {
.dylib, .internal => unreachable,
.zig_object => |x| x.updateArSize(),
.object => |x| x.updateArSize(macho_file),
};
}
pub fn writeAr(file: File, ar_format: Archive.Format, macho_file: *MachO, writer: anytype) !void {
return switch (file) {
.dylib, .internal => unreachable,
.zig_object => |x| x.writeAr(ar_format, writer),
.object => |x| x.writeAr(ar_format, macho_file, writer),
};
}
pub const Index = u32;
pub const Entry = union(enum) {
null: void,
zig_object: ZigObject,
internal: InternalObject,
object: Object,
dylib: Dylib,
};
pub const Handle = std.fs.File;
pub const HandleIndex = Index;
};
const assert = std.debug.assert;
const log = std.log.scoped(.link);
const macho = std.macho;
const std = @import("std");
const trace = @import("../../tracy.zig").trace;
const Allocator = std.mem.Allocator;
const Archive = @import("Archive.zig");
const Atom = @import("Atom.zig");
const InternalObject = @import("InternalObject.zig");
const MachO = @import("../MachO.zig");
const Object = @import("Object.zig");
const Dylib = @import("Dylib.zig");
const Symbol = @import("Symbol.zig");
const ZigObject = @import("ZigObject.zig");
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