| ... | ... | @@ -959,6 +959,9 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node |
| 959 | 959 | } else null; |
| 960 | 960 | const gc_sections = self.base.options.gc_sections orelse false; |
| 961 | 961 | |
| 962 | // --verbose-link |
| 963 | if (self.base.options.verbose_link) try self.dumpArgv(comp); |
| 964 | |
| 962 | 965 | var csu = try CsuObjects.init(arena, self.base.options, comp); |
| 963 | 966 | const compiler_rt_path: ?[]const u8 = blk: { |
| 964 | 967 | if (comp.compiler_rt_lib) |x| break :blk x.full_object_path; |
| ... | ... | @@ -966,247 +969,9 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node |
| 966 | 969 | break :blk null; |
| 967 | 970 | }; |
| 968 | 971 | |
| 969 | | // --verbose-link |
| 970 | | if (self.base.options.verbose_link) { |
| 971 | | var argv = std.ArrayList([]const u8).init(arena); |
| 972 | | |
| 973 | | try argv.append("zig"); |
| 974 | | try argv.append("ld"); |
| 975 | | |
| 976 | | try argv.append("-o"); |
| 977 | | try argv.append(full_out_path); |
| 978 | | |
| 979 | | if (self.base.options.entry) |entry| { |
| 980 | | try argv.append("--entry"); |
| 981 | | try argv.append(entry); |
| 982 | | } |
| 983 | | |
| 984 | | if (self.base.options.dynamic_linker) |path| { |
| 985 | | try argv.append("-dynamic-linker"); |
| 986 | | try argv.append(path); |
| 987 | | } |
| 988 | | |
| 989 | | if (self.base.options.soname) |name| { |
| 990 | | try argv.append("-soname"); |
| 991 | | try argv.append(name); |
| 992 | | } |
| 993 | | |
| 994 | | for (self.base.options.rpath_list) |rpath| { |
| 995 | | try argv.append("-rpath"); |
| 996 | | try argv.append(rpath); |
| 997 | | } |
| 998 | | |
| 999 | | if (self.base.options.each_lib_rpath) { |
| 1000 | | for (self.base.options.lib_dirs) |lib_dir_path| { |
| 1001 | | try argv.append("-rpath"); |
| 1002 | | try argv.append(lib_dir_path); |
| 1003 | | } |
| 1004 | | for (self.base.options.objects) |obj| { |
| 1005 | | if (Compilation.classifyFileExt(obj.path) == .shared_library) { |
| 1006 | | const lib_dir_path = std.fs.path.dirname(obj.path) orelse continue; |
| 1007 | | if (obj.loption) continue; |
| 1008 | | |
| 1009 | | try argv.append("-rpath"); |
| 1010 | | try argv.append(lib_dir_path); |
| 1011 | | } |
| 1012 | | } |
| 1013 | | } |
| 1014 | | |
| 1015 | | if (self.base.options.stack_size_override) |ss| { |
| 1016 | | try argv.append("-z"); |
| 1017 | | try argv.append(try std.fmt.allocPrint(arena, "stack-size={d}", .{ss})); |
| 1018 | | } |
| 1019 | | |
| 1020 | | if (self.base.options.image_base_override) |image_base| { |
| 1021 | | try argv.append(try std.fmt.allocPrint(arena, "--image-base={d}", .{image_base})); |
| 1022 | | } |
| 1023 | | |
| 1024 | | if (gc_sections) { |
| 1025 | | try argv.append("--gc-sections"); |
| 1026 | | } |
| 1027 | | |
| 1028 | | if (self.base.options.print_gc_sections) { |
| 1029 | | try argv.append("--print-gc-sections"); |
| 1030 | | } |
| 1031 | | |
| 1032 | | if (self.base.options.eh_frame_hdr) { |
| 1033 | | try argv.append("--eh-frame-hdr"); |
| 1034 | | } |
| 1035 | | |
| 1036 | | if (self.base.options.rdynamic) { |
| 1037 | | try argv.append("--export-dynamic"); |
| 1038 | | } |
| 1039 | | |
| 1040 | | if (self.base.options.strip) { |
| 1041 | | try argv.append("-s"); |
| 1042 | | } |
| 1043 | | |
| 1044 | | if (self.base.options.z_notext) { |
| 1045 | | try argv.append("-z"); |
| 1046 | | try argv.append("notext"); |
| 1047 | | } |
| 1048 | | |
| 1049 | | if (self.base.options.z_nocopyreloc) { |
| 1050 | | try argv.append("-z"); |
| 1051 | | try argv.append("nocopyreloc"); |
| 1052 | | } |
| 1053 | | |
| 1054 | | if (self.base.options.z_now) { |
| 1055 | | try argv.append("-z"); |
| 1056 | | try argv.append("now"); |
| 1057 | | } |
| 1058 | | |
| 1059 | | if (self.isStatic()) { |
| 1060 | | try argv.append("-static"); |
| 1061 | | } else if (self.isDynLib()) { |
| 1062 | | try argv.append("-shared"); |
| 1063 | | } |
| 1064 | | |
| 1065 | | if (self.base.options.pie and self.isExe()) { |
| 1066 | | try argv.append("-pie"); |
| 1067 | | } |
| 1068 | | |
| 1069 | | // csu prelude |
| 1070 | | if (csu.crt0) |v| try argv.append(v); |
| 1071 | | if (csu.crti) |v| try argv.append(v); |
| 1072 | | if (csu.crtbegin) |v| try argv.append(v); |
| 1073 | | |
| 1074 | | for (self.base.options.lib_dirs) |lib_dir| { |
| 1075 | | try argv.append("-L"); |
| 1076 | | try argv.append(lib_dir); |
| 1077 | | } |
| 1078 | | |
| 1079 | | if (self.base.options.link_libc) { |
| 1080 | | if (self.base.options.libc_installation) |libc_installation| { |
| 1081 | | try argv.append("-L"); |
| 1082 | | try argv.append(libc_installation.crt_dir.?); |
| 1083 | | } |
| 1084 | | } |
| 1085 | | |
| 1086 | | var whole_archive = false; |
| 1087 | | for (self.base.options.objects) |obj| { |
| 1088 | | if (obj.must_link and !whole_archive) { |
| 1089 | | try argv.append("-whole-archive"); |
| 1090 | | whole_archive = true; |
| 1091 | | } else if (!obj.must_link and whole_archive) { |
| 1092 | | try argv.append("-no-whole-archive"); |
| 1093 | | whole_archive = false; |
| 1094 | | } |
| 1095 | | |
| 1096 | | if (obj.loption) { |
| 1097 | | assert(obj.path[0] == ':'); |
| 1098 | | try argv.append("-l"); |
| 1099 | | } |
| 1100 | | try argv.append(obj.path); |
| 1101 | | } |
| 1102 | | if (whole_archive) { |
| 1103 | | try argv.append("-no-whole-archive"); |
| 1104 | | whole_archive = false; |
| 1105 | | } |
| 1106 | | |
| 1107 | | for (comp.c_object_table.keys()) |key| { |
| 1108 | | try argv.append(key.status.success.object_path); |
| 1109 | | } |
| 1110 | | |
| 1111 | | if (module_obj_path) |p| { |
| 1112 | | try argv.append(p); |
| 1113 | | } |
| 1114 | | |
| 1115 | | // TSAN |
| 1116 | | if (self.base.options.tsan) { |
| 1117 | | try argv.append(comp.tsan_static_lib.?.full_object_path); |
| 1118 | | } |
| 1119 | | |
| 1120 | | // libc |
| 1121 | | if (!self.base.options.skip_linker_dependencies and |
| 1122 | | !self.base.options.link_libc) |
| 1123 | | { |
| 1124 | | if (comp.libc_static_lib) |lib| { |
| 1125 | | try argv.append(lib.full_object_path); |
| 1126 | | } |
| 1127 | | } |
| 1128 | | |
| 1129 | | // stack-protector. |
| 1130 | | // Related: https://github.com/ziglang/zig/issues/7265 |
| 1131 | | if (comp.libssp_static_lib) |ssp| { |
| 1132 | | try argv.append(ssp.full_object_path); |
| 1133 | | } |
| 1134 | | |
| 1135 | | // Shared libraries. |
| 1136 | | // Worst-case, we need an --as-needed argument for every lib, as well |
| 1137 | | // as one before and one after. |
| 1138 | | try argv.ensureUnusedCapacity(self.base.options.system_libs.keys().len * 2 + 2); |
| 1139 | | argv.appendAssumeCapacity("--as-needed"); |
| 1140 | | var as_needed = true; |
| 1141 | | |
| 1142 | | for (self.base.options.system_libs.values()) |lib_info| { |
| 1143 | | const lib_as_needed = !lib_info.needed; |
| 1144 | | switch ((@as(u2, @intFromBool(lib_as_needed)) << 1) | @intFromBool(as_needed)) { |
| 1145 | | 0b00, 0b11 => {}, |
| 1146 | | 0b01 => { |
| 1147 | | argv.appendAssumeCapacity("--no-as-needed"); |
| 1148 | | as_needed = false; |
| 1149 | | }, |
| 1150 | | 0b10 => { |
| 1151 | | argv.appendAssumeCapacity("--as-needed"); |
| 1152 | | as_needed = true; |
| 1153 | | }, |
| 1154 | | } |
| 1155 | | argv.appendAssumeCapacity(lib_info.path.?); |
| 1156 | | } |
| 1157 | | |
| 1158 | | if (!as_needed) { |
| 1159 | | argv.appendAssumeCapacity("--as-needed"); |
| 1160 | | as_needed = true; |
| 1161 | | } |
| 1162 | | |
| 1163 | | // libc++ dep |
| 1164 | | if (self.base.options.link_libcpp) { |
| 1165 | | try argv.append(comp.libcxxabi_static_lib.?.full_object_path); |
| 1166 | | try argv.append(comp.libcxx_static_lib.?.full_object_path); |
| 1167 | | } |
| 1168 | | |
| 1169 | | // libunwind dep |
| 1170 | | if (self.base.options.link_libunwind) { |
| 1171 | | try argv.append(comp.libunwind_static_lib.?.full_object_path); |
| 1172 | | } |
| 1173 | | |
| 1174 | | // libc dep |
| 1175 | | if (self.base.options.link_libc) { |
| 1176 | | if (self.base.options.libc_installation != null) { |
| 1177 | | const needs_grouping = self.base.options.link_mode == .Static; |
| 1178 | | if (needs_grouping) try argv.append("--start-group"); |
| 1179 | | try argv.appendSlice(target_util.libcFullLinkFlags(target)); |
| 1180 | | if (needs_grouping) try argv.append("--end-group"); |
| 1181 | | } else if (target.isGnuLibC()) { |
| 1182 | | for (glibc.libs) |lib| { |
| 1183 | | const lib_path = try std.fmt.allocPrint(arena, "{s}{c}lib{s}.so.{d}", .{ |
| 1184 | | comp.glibc_so_files.?.dir_path, fs.path.sep, lib.name, lib.sover, |
| 1185 | | }); |
| 1186 | | try argv.append(lib_path); |
| 1187 | | } |
| 1188 | | try argv.append(try comp.get_libc_crt_file(arena, "libc_nonshared.a")); |
| 1189 | | } else if (target.isMusl()) { |
| 1190 | | try argv.append(try comp.get_libc_crt_file(arena, switch (self.base.options.link_mode) { |
| 1191 | | .Static => "libc.a", |
| 1192 | | .Dynamic => "libc.so", |
| 1193 | | })); |
| 1194 | | } |
| 1195 | | } |
| 1196 | | |
| 1197 | | // compiler-rt |
| 1198 | | if (compiler_rt_path) |p| { |
| 1199 | | try argv.append(p); |
| 1200 | | } |
| 1201 | | |
| 1202 | | // crt postlude |
| 1203 | | if (csu.crtend) |v| try argv.append(v); |
| 1204 | | if (csu.crtn) |v| try argv.append(v); |
| 1205 | | |
| 1206 | | Compilation.dump_argv(argv.items); |
| 1207 | | } |
| 1208 | | |
| 1209 | 972 | if (self.zigObjectPtr()) |zig_object| try zig_object.flushModule(self); |
| 973 | if (self.isStaticLib()) return self.flushStaticLib(comp, module_obj_path); |
| 974 | if (self.isObject()) return self.flushObject(comp, module_obj_path); |
| 1210 | 975 | |
| 1211 | 976 | // Here we will parse input positional and library files (if referenced). |
| 1212 | 977 | // This will roughly match in any linker backend we support. |
| ... | ... | @@ -1232,6 +997,7 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node |
| 1232 | 997 | // rpaths |
| 1233 | 998 | var rpath_table = std.StringArrayHashMap(void).init(self.base.allocator); |
| 1234 | 999 | defer rpath_table.deinit(); |
| 1000 | |
| 1235 | 1001 | for (self.base.options.rpath_list) |rpath| { |
| 1236 | 1002 | _ = try rpath_table.put(rpath, {}); |
| 1237 | 1003 | } |
| ... | ... | @@ -1380,8 +1146,6 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node |
| 1380 | 1146 | try self.handleAndReportParseError(obj.path, err, &parse_ctx); |
| 1381 | 1147 | } |
| 1382 | 1148 | |
| 1383 | | if (self.isStaticLib()) return self.flushStaticLib(); |
| 1384 | | |
| 1385 | 1149 | // Init all objects |
| 1386 | 1150 | for (self.objects.items) |index| { |
| 1387 | 1151 | try self.file(index).?.object.init(self); |
| ... | ... | @@ -1410,7 +1174,7 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node |
| 1410 | 1174 | |
| 1411 | 1175 | // If we haven't already, create a linker-generated input file comprising of |
| 1412 | 1176 | // linker-defined synthetic symbols only such as `_DYNAMIC`, etc. |
| 1413 | | if (self.linker_defined_index == null and !self.isRelocatable()) { |
| 1177 | if (self.linker_defined_index == null) { |
| 1414 | 1178 | const index = @as(File.Index, @intCast(try self.files.addOne(gpa))); |
| 1415 | 1179 | self.files.set(index, .{ .linker_defined = .{ .index = index } }); |
| 1416 | 1180 | self.linker_defined_index = index; |
| ... | ... | @@ -1424,8 +1188,6 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node |
| 1424 | 1188 | self.resolveSymbols(); |
| 1425 | 1189 | self.markEhFrameAtomsDead(); |
| 1426 | 1190 | |
| 1427 | | if (self.isObject()) return self.flushObject(); |
| 1428 | | |
| 1429 | 1191 | try self.convertCommonSymbols(); |
| 1430 | 1192 | self.markImportsExports(); |
| 1431 | 1193 | |
| ... | ... | @@ -1519,145 +1281,490 @@ pub fn flushModule(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node |
| 1519 | 1281 | } |
| 1520 | 1282 | } |
| 1521 | 1283 | |
| 1522 | | pub fn flushStaticLib(self: *Elf) link.File.FlushError!void { |
| 1523 | | const gpa = self.base.allocator; |
| 1284 | pub fn flushStaticLib(self: *Elf, comp: *Compilation, module_obj_path: ?[]const u8) link.File.FlushError!void { |
| 1285 | const gpa = self.base.allocator; |
| 1286 | |
| 1287 | var positionals = std.ArrayList(Compilation.LinkObject).init(gpa); |
| 1288 | defer positionals.deinit(); |
| 1289 | |
| 1290 | try positionals.ensureUnusedCapacity(self.base.options.objects.len); |
| 1291 | positionals.appendSliceAssumeCapacity(self.base.options.objects); |
| 1292 | |
| 1293 | // This is a set of object files emitted by clang in a single `build-exe` invocation. |
| 1294 | // For instance, the implicit `a.o` as compiled by `zig build-exe a.c` will end up |
| 1295 | // in this set. |
| 1296 | for (comp.c_object_table.keys()) |key| { |
| 1297 | try positionals.append(.{ .path = key.status.success.object_path }); |
| 1298 | } |
| 1299 | |
| 1300 | if (module_obj_path) |path| try positionals.append(.{ .path = path }); |
| 1301 | |
| 1302 | for (positionals.items) |obj| { |
| 1303 | var parse_ctx: ParseErrorCtx = .{ .detected_cpu_arch = undefined }; |
| 1304 | self.parsePositional(obj.path, obj.must_link, &parse_ctx) catch |err| |
| 1305 | try self.handleAndReportParseError(obj.path, err, &parse_ctx); |
| 1306 | } |
| 1307 | |
| 1308 | // First, we flush relocatable object file generated with our backends. |
| 1309 | if (self.zigObjectPtr()) |zig_object| { |
| 1310 | zig_object.resolveSymbols(self); |
| 1311 | zig_object.claimUnresolvedObject(self); |
| 1312 | |
| 1313 | try self.initSymtab(); |
| 1314 | try self.initShStrtab(); |
| 1315 | try self.sortShdrs(); |
| 1316 | try zig_object.addAtomsToRelaSections(self); |
| 1317 | try self.updateSectionSizesObject(); |
| 1318 | |
| 1319 | try self.allocateNonAllocSections(); |
| 1320 | |
| 1321 | if (build_options.enable_logging) { |
| 1322 | state_log.debug("{}", .{self.dumpState()}); |
| 1323 | } |
| 1324 | |
| 1325 | try self.writeSyntheticSectionsObject(); |
| 1326 | try self.writeShdrTable(); |
| 1327 | try self.writeElfHeader(); |
| 1328 | } |
| 1329 | |
| 1330 | var files = std.ArrayList(File.Index).init(gpa); |
| 1331 | defer files.deinit(); |
| 1332 | try files.ensureTotalCapacityPrecise(self.objects.items.len + 1); |
| 1333 | // Note to self: we currently must have ZigObject written out first as we write the object |
| 1334 | // file into the same file descriptor and then re-read its contents. |
| 1335 | // TODO implement writing ZigObject to a buffer instead of file. |
| 1336 | if (self.zigObjectPtr()) |zig_object| files.appendAssumeCapacity(zig_object.index); |
| 1337 | for (self.objects.items) |index| files.appendAssumeCapacity(index); |
| 1338 | |
| 1339 | // Update ar symtab from parsed objects |
| 1340 | var ar_symtab: Archive.ArSymtab = .{}; |
| 1341 | defer ar_symtab.deinit(gpa); |
| 1342 | |
| 1343 | for (files.items) |index| { |
| 1344 | try self.file(index).?.updateArSymtab(&ar_symtab, self); |
| 1345 | } |
| 1346 | |
| 1347 | ar_symtab.sort(); |
| 1348 | |
| 1349 | // Save object paths in filenames strtab. |
| 1350 | var ar_strtab: Archive.ArStrtab = .{}; |
| 1351 | defer ar_strtab.deinit(gpa); |
| 1352 | |
| 1353 | for (files.items) |index| { |
| 1354 | const file_ptr = self.file(index).?; |
| 1355 | try file_ptr.updateArStrtab(gpa, &ar_strtab); |
| 1356 | file_ptr.updateArSize(self); |
| 1357 | } |
| 1358 | |
| 1359 | // Update file offsets of contributing objects. |
| 1360 | const total_size: usize = blk: { |
| 1361 | var pos: usize = elf.ARMAG.len; |
| 1362 | pos += @sizeOf(elf.ar_hdr) + ar_symtab.size(.p64); |
| 1363 | |
| 1364 | if (ar_strtab.size() > 0) { |
| 1365 | pos = mem.alignForward(usize, pos, 2); |
| 1366 | pos += @sizeOf(elf.ar_hdr) + ar_strtab.size(); |
| 1367 | } |
| 1368 | |
| 1369 | for (files.items) |index| { |
| 1370 | const file_ptr = self.file(index).?; |
| 1371 | const state = switch (file_ptr) { |
| 1372 | .zig_object => |x| &x.output_ar_state, |
| 1373 | .object => |x| &x.output_ar_state, |
| 1374 | else => unreachable, |
| 1375 | }; |
| 1376 | pos = mem.alignForward(usize, pos, 2); |
| 1377 | state.file_off = pos; |
| 1378 | pos += @sizeOf(elf.ar_hdr) + (math.cast(usize, state.size) orelse return error.Overflow); |
| 1379 | } |
| 1380 | |
| 1381 | break :blk pos; |
| 1382 | }; |
| 1383 | |
| 1384 | if (build_options.enable_logging) { |
| 1385 | state_log.debug("ar_symtab\n{}\n", .{ar_symtab.fmt(self)}); |
| 1386 | state_log.debug("ar_strtab\n{}\n", .{ar_strtab}); |
| 1387 | } |
| 1388 | |
| 1389 | var buffer = std.ArrayList(u8).init(gpa); |
| 1390 | defer buffer.deinit(); |
| 1391 | try buffer.ensureTotalCapacityPrecise(total_size); |
| 1392 | |
| 1393 | // Write magic |
| 1394 | try buffer.writer().writeAll(elf.ARMAG); |
| 1395 | |
| 1396 | // Write symtab |
| 1397 | try ar_symtab.write(.p64, self, buffer.writer()); |
| 1398 | |
| 1399 | // Write strtab |
| 1400 | if (ar_strtab.size() > 0) { |
| 1401 | if (!mem.isAligned(buffer.items.len, 2)) try buffer.writer().writeByte(0); |
| 1402 | try ar_strtab.write(buffer.writer()); |
| 1403 | } |
| 1404 | |
| 1405 | // Write object files |
| 1406 | for (files.items) |index| { |
| 1407 | if (!mem.isAligned(buffer.items.len, 2)) try buffer.writer().writeByte(0); |
| 1408 | try self.file(index).?.writeAr(self, buffer.writer()); |
| 1409 | } |
| 1410 | |
| 1411 | assert(buffer.items.len == total_size); |
| 1412 | |
| 1413 | try self.base.file.?.setEndPos(total_size); |
| 1414 | try self.base.file.?.pwriteAll(buffer.items, 0); |
| 1415 | } |
| 1416 | |
| 1417 | pub fn flushObject(self: *Elf, comp: *Compilation, module_obj_path: ?[]const u8) link.File.FlushError!void { |
| 1418 | const gpa = self.base.allocator; |
| 1419 | |
| 1420 | var positionals = std.ArrayList(Compilation.LinkObject).init(gpa); |
| 1421 | defer positionals.deinit(); |
| 1422 | try positionals.ensureUnusedCapacity(self.base.options.objects.len); |
| 1423 | positionals.appendSliceAssumeCapacity(self.base.options.objects); |
| 1424 | |
| 1425 | // This is a set of object files emitted by clang in a single `build-exe` invocation. |
| 1426 | // For instance, the implicit `a.o` as compiled by `zig build-exe a.c` will end up |
| 1427 | // in this set. |
| 1428 | for (comp.c_object_table.keys()) |key| { |
| 1429 | try positionals.append(.{ .path = key.status.success.object_path }); |
| 1430 | } |
| 1431 | |
| 1432 | if (module_obj_path) |path| try positionals.append(.{ .path = path }); |
| 1433 | |
| 1434 | for (positionals.items) |obj| { |
| 1435 | var parse_ctx: ParseErrorCtx = .{ .detected_cpu_arch = undefined }; |
| 1436 | self.parsePositional(obj.path, obj.must_link, &parse_ctx) catch |err| |
| 1437 | try self.handleAndReportParseError(obj.path, err, &parse_ctx); |
| 1438 | } |
| 1439 | |
| 1440 | // Init all objects |
| 1441 | for (self.objects.items) |index| { |
| 1442 | try self.file(index).?.object.init(self); |
| 1443 | } |
| 1444 | |
| 1445 | // Now, we are ready to resolve the symbols across all input files. |
| 1446 | // We will first resolve the files in the ZigObject, next in the parsed |
| 1447 | // input Object files. |
| 1448 | // Any qualifing unresolved symbol will be upgraded to an absolute, weak |
| 1449 | // symbol for potential resolution at load-time. |
| 1450 | self.resolveSymbols(); |
| 1451 | self.markEhFrameAtomsDead(); |
| 1452 | self.claimUnresolvedObject(); |
| 1453 | |
| 1454 | try self.initSectionsObject(); |
| 1455 | try self.sortShdrs(); |
| 1456 | if (self.zigObjectPtr()) |zig_object| { |
| 1457 | try zig_object.addAtomsToRelaSections(self); |
| 1458 | } |
| 1459 | for (self.objects.items) |index| { |
| 1460 | const object = self.file(index).?.object; |
| 1461 | try object.addAtomsToOutputSections(self); |
| 1462 | try object.addAtomsToRelaSections(self); |
| 1463 | } |
| 1464 | try self.updateSectionSizesObject(); |
| 1465 | |
| 1466 | try self.allocateAllocSectionsObject(); |
| 1467 | try self.allocateNonAllocSections(); |
| 1468 | self.allocateAtoms(); |
| 1469 | |
| 1470 | if (build_options.enable_logging) { |
| 1471 | state_log.debug("{}", .{self.dumpState()}); |
| 1472 | } |
| 1473 | |
| 1474 | try self.writeAtomsObject(); |
| 1475 | try self.writeSyntheticSectionsObject(); |
| 1476 | try self.writeShdrTable(); |
| 1477 | try self.writeElfHeader(); |
| 1478 | } |
| 1479 | |
| 1480 | /// --verbose-link output |
| 1481 | fn dumpArgv(self: *Elf, comp: *Compilation) !void { |
| 1482 | var arena_allocator = std.heap.ArenaAllocator.init(self.base.allocator); |
| 1483 | defer arena_allocator.deinit(); |
| 1484 | const arena = arena_allocator.allocator(); |
| 1485 | |
| 1486 | const target = self.base.options.target; |
| 1487 | const directory = self.base.options.emit.?.directory; // Just an alias to make it shorter to type. |
| 1488 | const full_out_path = try directory.join(arena, &[_][]const u8{self.base.options.emit.?.sub_path}); |
| 1489 | const module_obj_path: ?[]const u8 = if (self.base.intermediary_basename) |path| blk: { |
| 1490 | if (fs.path.dirname(full_out_path)) |dirname| { |
| 1491 | break :blk try fs.path.join(arena, &.{ dirname, path }); |
| 1492 | } else { |
| 1493 | break :blk path; |
| 1494 | } |
| 1495 | } else null; |
| 1496 | const gc_sections = self.base.options.gc_sections orelse false; |
| 1497 | |
| 1498 | var csu = try CsuObjects.init(arena, self.base.options, comp); |
| 1499 | const compiler_rt_path: ?[]const u8 = blk: { |
| 1500 | if (comp.compiler_rt_lib) |x| break :blk x.full_object_path; |
| 1501 | if (comp.compiler_rt_obj) |x| break :blk x.full_object_path; |
| 1502 | break :blk null; |
| 1503 | }; |
| 1504 | |
| 1505 | var argv = std.ArrayList([]const u8).init(arena); |
| 1506 | |
| 1507 | try argv.append("zig"); |
| 1508 | |
| 1509 | if (self.isStaticLib()) { |
| 1510 | try argv.append("ar"); |
| 1511 | } else { |
| 1512 | try argv.append("ld"); |
| 1513 | } |
| 1514 | |
| 1515 | if (self.isObject()) { |
| 1516 | try argv.append("-r"); |
| 1517 | } |
| 1518 | |
| 1519 | try argv.append("-o"); |
| 1520 | try argv.append(full_out_path); |
| 1521 | |
| 1522 | if (self.isRelocatable()) { |
| 1523 | for (self.base.options.objects) |obj| { |
| 1524 | try argv.append(obj.path); |
| 1525 | } |
| 1526 | |
| 1527 | for (comp.c_object_table.keys()) |key| { |
| 1528 | try argv.append(key.status.success.object_path); |
| 1529 | } |
| 1530 | |
| 1531 | if (module_obj_path) |p| { |
| 1532 | try argv.append(p); |
| 1533 | } |
| 1534 | } else { |
| 1535 | if (!self.isStatic()) { |
| 1536 | if (self.base.options.dynamic_linker) |path| { |
| 1537 | try argv.append("-dynamic-linker"); |
| 1538 | try argv.append(path); |
| 1539 | } |
| 1540 | } |
| 1541 | |
| 1542 | if (self.isDynLib()) { |
| 1543 | if (self.base.options.soname) |name| { |
| 1544 | try argv.append("-soname"); |
| 1545 | try argv.append(name); |
| 1546 | } |
| 1547 | } |
| 1548 | |
| 1549 | if (self.base.options.entry) |entry| { |
| 1550 | try argv.append("--entry"); |
| 1551 | try argv.append(entry); |
| 1552 | } |
| 1553 | |
| 1554 | for (self.base.options.rpath_list) |rpath| { |
| 1555 | try argv.append("-rpath"); |
| 1556 | try argv.append(rpath); |
| 1557 | } |
| 1558 | |
| 1559 | if (self.base.options.each_lib_rpath) { |
| 1560 | for (self.base.options.lib_dirs) |lib_dir_path| { |
| 1561 | try argv.append("-rpath"); |
| 1562 | try argv.append(lib_dir_path); |
| 1563 | } |
| 1564 | for (self.base.options.objects) |obj| { |
| 1565 | if (Compilation.classifyFileExt(obj.path) == .shared_library) { |
| 1566 | const lib_dir_path = std.fs.path.dirname(obj.path) orelse continue; |
| 1567 | if (obj.loption) continue; |
| 1568 | |
| 1569 | try argv.append("-rpath"); |
| 1570 | try argv.append(lib_dir_path); |
| 1571 | } |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | if (self.base.options.stack_size_override) |ss| { |
| 1576 | try argv.append("-z"); |
| 1577 | try argv.append(try std.fmt.allocPrint(arena, "stack-size={d}", .{ss})); |
| 1578 | } |
| 1579 | |
| 1580 | if (self.base.options.image_base_override) |image_base| { |
| 1581 | try argv.append(try std.fmt.allocPrint(arena, "--image-base={d}", .{image_base})); |
| 1582 | } |
| 1583 | |
| 1584 | if (gc_sections) { |
| 1585 | try argv.append("--gc-sections"); |
| 1586 | } |
| 1587 | |
| 1588 | if (self.base.options.print_gc_sections) { |
| 1589 | try argv.append("--print-gc-sections"); |
| 1590 | } |
| 1524 | 1591 | |
| 1525 | | // First, we flush relocatable object file generated with our backends. |
| 1526 | | if (self.zigObjectPtr()) |zig_object| { |
| 1527 | | zig_object.resolveSymbols(self); |
| 1528 | | zig_object.claimUnresolvedObject(self); |
| 1592 | if (self.base.options.eh_frame_hdr) { |
| 1593 | try argv.append("--eh-frame-hdr"); |
| 1594 | } |
| 1529 | 1595 | |
| 1530 | | try self.initSymtab(); |
| 1531 | | try self.initShStrtab(); |
| 1532 | | try self.sortShdrs(); |
| 1533 | | try zig_object.addAtomsToRelaSections(self); |
| 1534 | | try self.updateSectionSizesObject(); |
| 1596 | if (self.base.options.rdynamic) { |
| 1597 | try argv.append("--export-dynamic"); |
| 1598 | } |
| 1535 | 1599 | |
| 1536 | | try self.allocateNonAllocSections(); |
| 1600 | if (self.base.options.z_notext) { |
| 1601 | try argv.append("-z"); |
| 1602 | try argv.append("notext"); |
| 1603 | } |
| 1537 | 1604 | |
| 1538 | | if (build_options.enable_logging) { |
| 1539 | | state_log.debug("{}", .{self.dumpState()}); |
| 1605 | if (self.base.options.z_nocopyreloc) { |
| 1606 | try argv.append("-z"); |
| 1607 | try argv.append("nocopyreloc"); |
| 1540 | 1608 | } |
| 1541 | 1609 | |
| 1542 | | try self.writeSyntheticSectionsObject(); |
| 1543 | | try self.writeShdrTable(); |
| 1544 | | try self.writeElfHeader(); |
| 1545 | | } |
| 1610 | if (self.base.options.z_now) { |
| 1611 | try argv.append("-z"); |
| 1612 | try argv.append("now"); |
| 1613 | } |
| 1546 | 1614 | |
| 1547 | | var files = std.ArrayList(File.Index).init(gpa); |
| 1548 | | defer files.deinit(); |
| 1549 | | try files.ensureTotalCapacityPrecise(self.objects.items.len + 1); |
| 1550 | | // Note to self: we currently must have ZigObject written out first as we write the object |
| 1551 | | // file into the same file descriptor and then re-read its contents. |
| 1552 | | // TODO implement writing ZigObject to a buffer instead of file. |
| 1553 | | if (self.zigObjectPtr()) |zig_object| files.appendAssumeCapacity(zig_object.index); |
| 1554 | | for (self.objects.items) |index| files.appendAssumeCapacity(index); |
| 1615 | if (self.isStatic()) { |
| 1616 | try argv.append("-static"); |
| 1617 | } else if (self.isDynLib()) { |
| 1618 | try argv.append("-shared"); |
| 1619 | } |
| 1555 | 1620 | |
| 1556 | | // Update ar symtab from parsed objects |
| 1557 | | var ar_symtab: Archive.ArSymtab = .{}; |
| 1558 | | defer ar_symtab.deinit(gpa); |
| 1621 | if (self.base.options.pie and self.isExe()) { |
| 1622 | try argv.append("-pie"); |
| 1623 | } |
| 1559 | 1624 | |
| 1560 | | for (files.items) |index| { |
| 1561 | | try self.file(index).?.updateArSymtab(&ar_symtab, self); |
| 1562 | | } |
| 1625 | if (self.base.options.strip) { |
| 1626 | try argv.append("-s"); |
| 1627 | } |
| 1563 | 1628 | |
| 1564 | | ar_symtab.sort(); |
| 1629 | // csu prelude |
| 1630 | if (csu.crt0) |v| try argv.append(v); |
| 1631 | if (csu.crti) |v| try argv.append(v); |
| 1632 | if (csu.crtbegin) |v| try argv.append(v); |
| 1565 | 1633 | |
| 1566 | | // Save object paths in filenames strtab. |
| 1567 | | var ar_strtab: Archive.ArStrtab = .{}; |
| 1568 | | defer ar_strtab.deinit(gpa); |
| 1634 | for (self.base.options.lib_dirs) |lib_dir| { |
| 1635 | try argv.append("-L"); |
| 1636 | try argv.append(lib_dir); |
| 1637 | } |
| 1569 | 1638 | |
| 1570 | | for (files.items) |index| { |
| 1571 | | const file_ptr = self.file(index).?; |
| 1572 | | try file_ptr.updateArStrtab(gpa, &ar_strtab); |
| 1573 | | file_ptr.updateArSize(self); |
| 1574 | | } |
| 1639 | if (self.base.options.link_libc) { |
| 1640 | if (self.base.options.libc_installation) |libc_installation| { |
| 1641 | try argv.append("-L"); |
| 1642 | try argv.append(libc_installation.crt_dir.?); |
| 1643 | } |
| 1644 | } |
| 1575 | 1645 | |
| 1576 | | // Update file offsets of contributing objects. |
| 1577 | | const total_size: usize = blk: { |
| 1578 | | var pos: usize = elf.ARMAG.len; |
| 1579 | | pos += @sizeOf(elf.ar_hdr) + ar_symtab.size(.p64); |
| 1646 | var whole_archive = false; |
| 1647 | for (self.base.options.objects) |obj| { |
| 1648 | if (obj.must_link and !whole_archive) { |
| 1649 | try argv.append("-whole-archive"); |
| 1650 | whole_archive = true; |
| 1651 | } else if (!obj.must_link and whole_archive) { |
| 1652 | try argv.append("-no-whole-archive"); |
| 1653 | whole_archive = false; |
| 1654 | } |
| 1580 | 1655 | |
| 1581 | | if (ar_strtab.size() > 0) { |
| 1582 | | pos = mem.alignForward(usize, pos, 2); |
| 1583 | | pos += @sizeOf(elf.ar_hdr) + ar_strtab.size(); |
| 1656 | if (obj.loption) { |
| 1657 | assert(obj.path[0] == ':'); |
| 1658 | try argv.append("-l"); |
| 1659 | } |
| 1660 | try argv.append(obj.path); |
| 1584 | 1661 | } |
| 1585 | | |
| 1586 | | for (files.items) |index| { |
| 1587 | | const file_ptr = self.file(index).?; |
| 1588 | | const state = switch (file_ptr) { |
| 1589 | | .zig_object => |x| &x.output_ar_state, |
| 1590 | | .object => |x| &x.output_ar_state, |
| 1591 | | else => unreachable, |
| 1592 | | }; |
| 1593 | | pos = mem.alignForward(usize, pos, 2); |
| 1594 | | state.file_off = pos; |
| 1595 | | pos += @sizeOf(elf.ar_hdr) + (math.cast(usize, state.size) orelse return error.Overflow); |
| 1662 | if (whole_archive) { |
| 1663 | try argv.append("-no-whole-archive"); |
| 1664 | whole_archive = false; |
| 1596 | 1665 | } |
| 1597 | 1666 | |
| 1598 | | break :blk pos; |
| 1599 | | }; |
| 1667 | for (comp.c_object_table.keys()) |key| { |
| 1668 | try argv.append(key.status.success.object_path); |
| 1669 | } |
| 1600 | 1670 | |
| 1601 | | if (build_options.enable_logging) { |
| 1602 | | state_log.debug("ar_symtab\n{}\n", .{ar_symtab.fmt(self)}); |
| 1603 | | state_log.debug("ar_strtab\n{}\n", .{ar_strtab}); |
| 1604 | | } |
| 1671 | if (module_obj_path) |p| { |
| 1672 | try argv.append(p); |
| 1673 | } |
| 1605 | 1674 | |
| 1606 | | var buffer = std.ArrayList(u8).init(gpa); |
| 1607 | | defer buffer.deinit(); |
| 1608 | | try buffer.ensureTotalCapacityPrecise(total_size); |
| 1675 | // TSAN |
| 1676 | if (self.base.options.tsan) { |
| 1677 | try argv.append(comp.tsan_static_lib.?.full_object_path); |
| 1678 | } |
| 1609 | 1679 | |
| 1610 | | // Write magic |
| 1611 | | try buffer.writer().writeAll(elf.ARMAG); |
| 1680 | // libc |
| 1681 | if (!self.base.options.skip_linker_dependencies and |
| 1682 | !self.base.options.link_libc) |
| 1683 | { |
| 1684 | if (comp.libc_static_lib) |lib| { |
| 1685 | try argv.append(lib.full_object_path); |
| 1686 | } |
| 1687 | } |
| 1612 | 1688 | |
| 1613 | | // Write symtab |
| 1614 | | try ar_symtab.write(.p64, self, buffer.writer()); |
| 1689 | // stack-protector. |
| 1690 | // Related: https://github.com/ziglang/zig/issues/7265 |
| 1691 | if (comp.libssp_static_lib) |ssp| { |
| 1692 | try argv.append(ssp.full_object_path); |
| 1693 | } |
| 1615 | 1694 | |
| 1616 | | // Write strtab |
| 1617 | | if (ar_strtab.size() > 0) { |
| 1618 | | if (!mem.isAligned(buffer.items.len, 2)) try buffer.writer().writeByte(0); |
| 1619 | | try ar_strtab.write(buffer.writer()); |
| 1620 | | } |
| 1695 | // Shared libraries. |
| 1696 | // Worst-case, we need an --as-needed argument for every lib, as well |
| 1697 | // as one before and one after. |
| 1698 | try argv.ensureUnusedCapacity(self.base.options.system_libs.keys().len * 2 + 2); |
| 1699 | argv.appendAssumeCapacity("--as-needed"); |
| 1700 | var as_needed = true; |
| 1621 | 1701 | |
| 1622 | | // Write object files |
| 1623 | | for (files.items) |index| { |
| 1624 | | if (!mem.isAligned(buffer.items.len, 2)) try buffer.writer().writeByte(0); |
| 1625 | | try self.file(index).?.writeAr(self, buffer.writer()); |
| 1626 | | } |
| 1702 | for (self.base.options.system_libs.values()) |lib_info| { |
| 1703 | const lib_as_needed = !lib_info.needed; |
| 1704 | switch ((@as(u2, @intFromBool(lib_as_needed)) << 1) | @intFromBool(as_needed)) { |
| 1705 | 0b00, 0b11 => {}, |
| 1706 | 0b01 => { |
| 1707 | argv.appendAssumeCapacity("--no-as-needed"); |
| 1708 | as_needed = false; |
| 1709 | }, |
| 1710 | 0b10 => { |
| 1711 | argv.appendAssumeCapacity("--as-needed"); |
| 1712 | as_needed = true; |
| 1713 | }, |
| 1714 | } |
| 1715 | argv.appendAssumeCapacity(lib_info.path.?); |
| 1716 | } |
| 1627 | 1717 | |
| 1628 | | assert(buffer.items.len == total_size); |
| 1718 | if (!as_needed) { |
| 1719 | argv.appendAssumeCapacity("--as-needed"); |
| 1720 | as_needed = true; |
| 1721 | } |
| 1629 | 1722 | |
| 1630 | | try self.base.file.?.setEndPos(total_size); |
| 1631 | | try self.base.file.?.pwriteAll(buffer.items, 0); |
| 1632 | | } |
| 1723 | // libc++ dep |
| 1724 | if (self.base.options.link_libcpp) { |
| 1725 | try argv.append(comp.libcxxabi_static_lib.?.full_object_path); |
| 1726 | try argv.append(comp.libcxx_static_lib.?.full_object_path); |
| 1727 | } |
| 1633 | 1728 | |
| 1634 | | pub fn flushObject(self: *Elf) link.File.FlushError!void { |
| 1635 | | self.claimUnresolvedObject(); |
| 1729 | // libunwind dep |
| 1730 | if (self.base.options.link_libunwind) { |
| 1731 | try argv.append(comp.libunwind_static_lib.?.full_object_path); |
| 1732 | } |
| 1636 | 1733 | |
| 1637 | | try self.initSectionsObject(); |
| 1638 | | try self.sortShdrs(); |
| 1639 | | if (self.zigObjectPtr()) |zig_object| { |
| 1640 | | try zig_object.addAtomsToRelaSections(self); |
| 1641 | | } |
| 1642 | | for (self.objects.items) |index| { |
| 1643 | | const object = self.file(index).?.object; |
| 1644 | | try object.addAtomsToOutputSections(self); |
| 1645 | | try object.addAtomsToRelaSections(self); |
| 1646 | | } |
| 1647 | | try self.updateSectionSizesObject(); |
| 1734 | // libc dep |
| 1735 | if (self.base.options.link_libc) { |
| 1736 | if (self.base.options.libc_installation != null) { |
| 1737 | const needs_grouping = self.base.options.link_mode == .Static; |
| 1738 | if (needs_grouping) try argv.append("--start-group"); |
| 1739 | try argv.appendSlice(target_util.libcFullLinkFlags(target)); |
| 1740 | if (needs_grouping) try argv.append("--end-group"); |
| 1741 | } else if (target.isGnuLibC()) { |
| 1742 | for (glibc.libs) |lib| { |
| 1743 | const lib_path = try std.fmt.allocPrint(arena, "{s}{c}lib{s}.so.{d}", .{ |
| 1744 | comp.glibc_so_files.?.dir_path, fs.path.sep, lib.name, lib.sover, |
| 1745 | }); |
| 1746 | try argv.append(lib_path); |
| 1747 | } |
| 1748 | try argv.append(try comp.get_libc_crt_file(arena, "libc_nonshared.a")); |
| 1749 | } else if (target.isMusl()) { |
| 1750 | try argv.append(try comp.get_libc_crt_file(arena, switch (self.base.options.link_mode) { |
| 1751 | .Static => "libc.a", |
| 1752 | .Dynamic => "libc.so", |
| 1753 | })); |
| 1754 | } |
| 1755 | } |
| 1648 | 1756 | |
| 1649 | | try self.allocateAllocSectionsObject(); |
| 1650 | | try self.allocateNonAllocSections(); |
| 1651 | | self.allocateAtoms(); |
| 1757 | // compiler-rt |
| 1758 | if (compiler_rt_path) |p| { |
| 1759 | try argv.append(p); |
| 1760 | } |
| 1652 | 1761 | |
| 1653 | | if (build_options.enable_logging) { |
| 1654 | | state_log.debug("{}", .{self.dumpState()}); |
| 1762 | // crt postlude |
| 1763 | if (csu.crtend) |v| try argv.append(v); |
| 1764 | if (csu.crtn) |v| try argv.append(v); |
| 1655 | 1765 | } |
| 1656 | 1766 | |
| 1657 | | try self.writeAtomsObject(); |
| 1658 | | try self.writeSyntheticSectionsObject(); |
| 1659 | | try self.writeShdrTable(); |
| 1660 | | try self.writeElfHeader(); |
| 1767 | Compilation.dump_argv(argv.items); |
| 1661 | 1768 | } |
| 1662 | 1769 | |
| 1663 | 1770 | const ParseError = error{ |
| ... | ... | @@ -3651,8 +3758,10 @@ fn setDynamicSection(self: *Elf, rpaths: []const []const u8) !void { |
| 3651 | 3758 | try self.dynamic.addNeeded(shared_object, self); |
| 3652 | 3759 | } |
| 3653 | 3760 | |
| 3654 | | if (self.base.options.soname) |soname| { |
| 3655 | | try self.dynamic.setSoname(soname, self); |
| 3761 | if (self.isDynLib()) { |
| 3762 | if (self.base.options.soname) |soname| { |
| 3763 | try self.dynamic.setSoname(soname, self); |
| 3764 | } |
| 3656 | 3765 | } |
| 3657 | 3766 | |
| 3658 | 3767 | try self.dynamic.setRpath(rpaths, self); |
Jakub Konka <kubkon@jakubkonka.com> 2023-11-08 17:35:56+01:00
src