diff options
Diffstat (limited to 'src/codegen.zig')
| -rw-r--r-- | src/codegen.zig | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/src/codegen.zig b/src/codegen.zig index 53a4f9a402..6f262a8179 100644 --- a/src/codegen.zig +++ b/src/codegen.zig @@ -556,14 +556,42 @@ pub fn generateSymbol( }, .Struct => { if (typed_value.ty.containerLayout() == .Packed) { - return Result{ - .fail = try ErrorMsg.create( - bin_file.allocator, - src_loc, - "TODO implement generateSymbol for packed struct", - .{}, - ), - }; + const struct_obj = typed_value.ty.castTag(.@"struct").?.data; + const fields = struct_obj.fields.values(); + const field_vals = typed_value.val.castTag(.aggregate).?.data; + const abi_size = math.cast(usize, typed_value.ty.abiSize(target)) orelse return error.Overflow; + const current_pos = code.items.len; + const mod = bin_file.options.module.?; + try code.resize(current_pos + abi_size); + var bits: u16 = 0; + + for (field_vals) |field_val, index| { + const field_ty = fields[index].ty; + // pointer may point to a decl which must be marked used + // but can also result in a relocation. Therefore we handle those seperately. + if (field_ty.zigTypeTag() == .Pointer) { + std.debug.print("Hit!\n", .{}); + var tmp_list = try std.ArrayList(u8).initCapacity(code.allocator, field_ty.abiSize(target)); + defer tmp_list.deinit(); + switch (try generateSymbol(bin_file, src_loc, .{ + .ty = field_ty, + .val = field_val, + }, &tmp_list, debug_output, reloc_info)) { + .appended => { + mem.copy(u8, code.items[current_pos..], tmp_list.items); + }, + .externally_managed => |external_slice| { + mem.copy(u8, code.items[current_pos..], external_slice); + }, + .fail => |em| return Result{ .fail = em }, + } + } else { + field_val.writeToPackedMemory(field_ty, mod, code.items[current_pos..], bits); + } + bits += @intCast(u16, field_ty.bitSize(target)); + } + + return Result{ .appended = {} }; } const struct_begin = code.items.len; |