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pub const File = union(enum) {
zig_object: *ZigObject,
linker_defined: *LinkerDefined,
object: *Object,
shared_object: *SharedObject,
pub fn index(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.print("{s}", .{x.path}),
.linker_defined => try writer.writeAll("(linker defined)"),
.object => |x| try writer.print("{}", .{x.fmtPath()}),
.shared_object => |x| try writer.writeAll(x.path),
}
}
pub fn isAlive(file: File) bool {
return switch (file) {
.zig_object => true,
.linker_defined => true,
inline else => |x| x.alive,
};
}
/// Encodes symbol rank so that the following ordering applies:
/// * strong defined
/// * weak defined
/// * strong in lib (dso/archive)
/// * weak in lib (dso/archive)
/// * common
/// * common in lib (archive)
/// * unclaimed
pub fn symbolRank(file: File, sym: elf.Elf64_Sym, in_archive: bool) u32 {
const base: u3 = blk: {
if (sym.st_shndx == elf.SHN_COMMON) break :blk if (in_archive) 6 else 5;
if (file == .shared_object or in_archive) break :blk switch (sym.st_bind()) {
elf.STB_GLOBAL => 3,
else => 4,
};
break :blk switch (sym.st_bind()) {
elf.STB_GLOBAL => 1,
else => 2,
};
};
return (@as(u32, base) << 24) + file.index();
}
pub fn resolveSymbols(file: File, elf_file: *Elf) void {
switch (file) {
inline else => |x| x.resolveSymbols(elf_file),
}
}
pub fn resetGlobals(file: File, elf_file: *Elf) void {
for (file.globals()) |global_index| {
const global = elf_file.symbol(global_index);
const name_offset = global.name_offset;
global.* = .{};
global.name_offset = name_offset;
global.flags.global = true;
}
}
pub fn setAlive(file: File) void {
switch (file) {
.zig_object, .linker_defined => {},
inline else => |x| x.alive = true,
}
}
pub fn markLive(file: File, elf_file: *Elf) void {
switch (file) {
.linker_defined => {},
inline else => |x| x.markLive(elf_file),
}
}
pub fn scanRelocs(file: File, elf_file: *Elf, undefs: anytype) !void {
switch (file) {
.linker_defined, .shared_object => unreachable,
inline else => |x| try x.scanRelocs(elf_file, undefs),
}
}
pub fn atoms(file: File) []const Atom.Index {
return switch (file) {
.linker_defined, .shared_object => &[0]Atom.Index{},
.zig_object => |x| x.atoms.items,
.object => |x| x.atoms.items,
};
}
pub fn cies(file: File) []const Cie {
return switch (file) {
.zig_object => &[0]Cie{},
.object => |x| x.cies.items,
inline else => unreachable,
};
}
pub fn symbol(file: File, ind: Symbol.Index) Symbol.Index {
return switch (file) {
.zig_object => |x| x.symbol(ind),
inline else => |x| x.symbols.items[ind],
};
}
pub fn locals(file: File) []const Symbol.Index {
return switch (file) {
.linker_defined, .shared_object => &[0]Symbol.Index{},
inline else => |x| x.locals(),
};
}
pub fn globals(file: File) []const Symbol.Index {
return switch (file) {
inline else => |x| x.globals(),
};
}
pub fn updateSymtabSize(file: File, elf_file: *Elf) !void {
return switch (file) {
inline else => |x| x.updateSymtabSize(elf_file),
};
}
pub fn writeSymtab(file: File, elf_file: *Elf) void {
return switch (file) {
inline else => |x| x.writeSymtab(elf_file),
};
}
pub fn updateArSymtab(file: File, ar_symtab: *Archive.ArSymtab, elf_file: *Elf) !void {
return switch (file) {
.zig_object => |x| x.updateArSymtab(ar_symtab, elf_file),
.object => |x| x.updateArSymtab(ar_symtab, elf_file),
inline else => unreachable,
};
}
pub fn updateArStrtab(file: File, allocator: Allocator, ar_strtab: *Archive.ArStrtab) !void {
const path = switch (file) {
.zig_object => |x| x.path,
.object => |x| x.path,
inline else => unreachable,
};
const state = switch (file) {
.zig_object => |x| &x.output_ar_state,
.object => |x| &x.output_ar_state,
inline else => unreachable,
};
if (path.len <= Archive.max_member_name_len) return;
state.name_off = try ar_strtab.insert(allocator, path);
}
pub fn updateArSize(file: File, elf_file: *Elf) !void {
return switch (file) {
.zig_object => |x| x.updateArSize(),
.object => |x| x.updateArSize(elf_file),
inline else => unreachable,
};
}
pub fn writeAr(file: File, elf_file: *Elf, writer: anytype) !void {
return switch (file) {
.zig_object => |x| x.writeAr(writer),
.object => |x| x.writeAr(elf_file, writer),
inline else => unreachable,
};
}
pub const Index = u32;
pub const Entry = union(enum) {
null: void,
zig_object: ZigObject,
linker_defined: LinkerDefined,
object: Object,
shared_object: SharedObject,
};
pub const Handle = std.fs.File;
pub const HandleIndex = Index;
};
const std = @import("std");
const elf = std.elf;
const Allocator = std.mem.Allocator;
const Archive = @import("Archive.zig");
const Atom = @import("Atom.zig");
const Cie = @import("eh_frame.zig").Cie;
const Elf = @import("../Elf.zig");
const LinkerDefined = @import("LinkerDefined.zig");
const Object = @import("Object.zig");
const SharedObject = @import("SharedObject.zig");
const Symbol = @import("Symbol.zig");
const ZigObject = @import("ZigObject.zig");
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