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macho: implement enough of extern handling to pass comptime export tests

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This commit is contained in:
Jakub Konka
2023-10-30 00:09:32 +01:00
parent 71dfea1f17
commit 2e690f5c74
7 changed files with 121 additions and 73 deletions
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9
src/codegen.zig
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@@ -721,6 +721,7 @@ fn lowerAnonDeclRef(
const ptr_width_bytes = @divExact(target.ptrBitWidth(), 8);
const decl_val = anon_decl.val;
const decl_ty = mod.intern_pool.typeOf(decl_val).toType();
log.debug("lowerAnonDecl: ty = {}", .{decl_ty.fmt(mod)});
const is_fn_body = decl_ty.zigTypeTag(mod) == .Fn;
if (!is_fn_body and !decl_ty.hasRuntimeBits(mod)) {
try code.appendNTimes(0xaa, ptr_width_bytes);
@@ -911,6 +912,14 @@ fn genDeclRef(
_ = try sym.getOrCreateZigGotEntry(sym_index, elf_file);
return GenResult.mcv(.{ .load_symbol = sym.esym_index });
} else if (bin_file.cast(link.File.MachO)) |macho_file| {
if (is_extern) {
// TODO make this part of getGlobalSymbol
const name = mod.intern_pool.stringToSlice(decl.name);
const sym_name = try std.fmt.allocPrint(bin_file.allocator, "_{s}", .{name});
defer bin_file.allocator.free(sym_name);
const global_index = try macho_file.addUndefined(sym_name, .{ .add_got = true });
return GenResult.mcv(.{ .load_got = link.File.MachO.global_symbol_bit | global_index });
}
const atom_index = try macho_file.getOrCreateAtomForDecl(decl_index);
const sym_index = macho_file.getAtom(atom_index).getSymbolIndex().?;
if (is_threadlocal) {