const std = @import("std"); const fs = std.fs; const fmt = std.fmt; const assert = std.debug.assert; // Example abilist path: // ./sysdeps/unix/sysv/linux/aarch64/libc.abilist const AbiList = struct { targets: []const ZigTarget, path: []const u8, }; const ZigTarget = struct { arch: std.Target.Cpu.Arch, abi: std.Target.Abi, }; const lib_names = [_][]const u8{ "c", "dl", "m", "pthread", "rt", "ld", "util", }; // fpu/nofpu are hardcoded elsewhere, based on .gnueabi/.gnueabihf with an exception for .arm // n64/n32 are hardcoded elsewhere, based on .gnuabi64/.gnuabin32 const abi_lists = [_]AbiList{ AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .aarch64, .abi = .gnu }, ZigTarget{ .arch = .aarch64_be, .abi = .gnu }, }, .path = "aarch64", }, AbiList{ .targets = &[_]ZigTarget{ZigTarget{ .arch = .s390x, .abi = .gnu }}, .path = "s390/s390-64", }, AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .arm, .abi = .gnueabi }, ZigTarget{ .arch = .armeb, .abi = .gnueabi }, ZigTarget{ .arch = .arm, .abi = .gnueabihf }, ZigTarget{ .arch = .armeb, .abi = .gnueabihf }, }, .path = "arm", }, AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .sparc, .abi = .gnu }, ZigTarget{ .arch = .sparcel, .abi = .gnu }, }, .path = "sparc/sparc32", }, AbiList{ .targets = &[_]ZigTarget{ZigTarget{ .arch = .sparcv9, .abi = .gnu }}, .path = "sparc/sparc64", }, AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .mips64el, .abi = .gnuabi64 }, ZigTarget{ .arch = .mips64, .abi = .gnuabi64 }, }, .path = "mips/mips64", }, AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .mips64el, .abi = .gnuabin32 }, ZigTarget{ .arch = .mips64, .abi = .gnuabin32 }, }, .path = "mips/mips64", }, AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .mipsel, .abi = .gnueabihf }, ZigTarget{ .arch = .mips, .abi = .gnueabihf }, }, .path = "mips/mips32", }, AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .mipsel, .abi = .gnueabi }, ZigTarget{ .arch = .mips, .abi = .gnueabi }, }, .path = "mips/mips32", }, AbiList{ .targets = &[_]ZigTarget{ZigTarget{ .arch = .x86_64, .abi = .gnu }}, .path = "x86_64/64", }, AbiList{ .targets = &[_]ZigTarget{ZigTarget{ .arch = .x86_64, .abi = .gnux32 }}, .path = "x86_64/x32", }, AbiList{ .targets = &[_]ZigTarget{ZigTarget{ .arch = .i386, .abi = .gnu }}, .path = "i386", }, AbiList{ .targets = &[_]ZigTarget{ZigTarget{ .arch = .powerpc64le, .abi = .gnu }}, .path = "powerpc/powerpc64/le", }, AbiList{ .targets = &[_]ZigTarget{ZigTarget{ .arch = .powerpc64, .abi = .gnu }}, .path = "powerpc/powerpc64/be", }, AbiList{ .targets = &[_]ZigTarget{ ZigTarget{ .arch = .powerpc, .abi = .gnueabi }, ZigTarget{ .arch = .powerpc, .abi = .gnueabihf }, }, .path = "powerpc/powerpc32", }, }; const FunctionSet = struct { list: std.ArrayList(VersionedFn), fn_vers_list: FnVersionList, }; const FnVersionList = std.StringHashMap(std.ArrayList(usize)); const VersionedFn = struct { ver: []const u8, // example: "GLIBC_2.15" name: []const u8, // example: "puts" }; const Function = struct { name: []const u8, // example: "puts" lib: []const u8, // example: "c" index: usize, }; pub fn main() !void { var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator); const allocator = &arena.allocator; const args = try std.process.argsAlloc(allocator); const in_glibc_dir = args[1]; // path to the unzipped tarball of glibc, e.g. ~/downloads/glibc-2.25 const zig_src_dir = args[2]; // path to the source checkout of zig, lib dir, e.g. ~/zig-src/lib const prefix = try fs.path.join(allocator, &[_][]const u8{ in_glibc_dir, "sysdeps", "unix", "sysv", "linux" }); const glibc_out_dir = try fs.path.join(allocator, &[_][]const u8{ zig_src_dir, "libc", "glibc" }); var global_fn_set = std.StringHashMap(Function).init(allocator); var global_ver_set = std.StringHashMap(usize).init(allocator); var target_functions = std.AutoHashMap(usize, FunctionSet).init(allocator); for (abi_lists) |*abi_list| { const target_funcs_gop = try target_functions.getOrPut(@ptrToInt(abi_list)); if (!target_funcs_gop.found_existing) { target_funcs_gop.entry.value = FunctionSet{ .list = std.ArrayList(VersionedFn).init(allocator), .fn_vers_list = FnVersionList.init(allocator), }; } const fn_set = &target_funcs_gop.entry.value.list; for (lib_names) |lib_name, lib_name_index| { const lib_prefix = if (std.mem.eql(u8, lib_name, "ld")) "" else "lib"; const basename = try fmt.allocPrint(allocator, "{s}{s}.abilist", .{ lib_prefix, lib_name }); const abi_list_filename = blk: { const is_c = std.mem.eql(u8, lib_name, "c"); const is_m = std.mem.eql(u8, lib_name, "m"); const is_ld = std.mem.eql(u8, lib_name, "ld"); if (abi_list.targets[0].abi == .gnuabi64 and (is_c or is_ld)) { break :blk try fs.path.join(allocator, &[_][]const u8{ prefix, abi_list.path, "n64", basename }); } else if (abi_list.targets[0].abi == .gnuabin32 and (is_c or is_ld)) { break :blk try fs.path.join(allocator, &[_][]const u8{ prefix, abi_list.path, "n32", basename }); } else if (abi_list.targets[0].arch != .arm and abi_list.targets[0].abi == .gnueabihf and (is_c or (is_m and abi_list.targets[0].arch == .powerpc))) { break :blk try fs.path.join(allocator, &[_][]const u8{ prefix, abi_list.path, "fpu", basename }); } else if (abi_list.targets[0].arch != .arm and abi_list.targets[0].abi == .gnueabi and (is_c or (is_m and abi_list.targets[0].arch == .powerpc))) { break :blk try fs.path.join(allocator, &[_][]const u8{ prefix, abi_list.path, "nofpu", basename }); } else if (abi_list.targets[0].arch == .arm) { break :blk try fs.path.join(allocator, &[_][]const u8{ prefix, abi_list.path, "le", basename }); } else if (abi_list.targets[0].arch == .armeb) { break :blk try fs.path.join(allocator, &[_][]const u8{ prefix, abi_list.path, "be", basename }); } break :blk try fs.path.join(allocator, &[_][]const u8{ prefix, abi_list.path, basename }); }; const max_bytes = 10 * 1024 * 1024; const contents = std.fs.cwd().readFileAlloc(allocator, abi_list_filename, max_bytes) catch |err| { std.debug.warn("unable to open {s}: {}\n", .{ abi_list_filename, err }); std.process.exit(1); }; var lines_it = std.mem.tokenize(contents, "\n"); while (lines_it.next()) |line| { var tok_it = std.mem.tokenize(line, " "); const ver = tok_it.next().?; const name = tok_it.next().?; const category = tok_it.next().?; if (!std.mem.eql(u8, category, "F") and !std.mem.eql(u8, category, "D")) { continue; } if (std.mem.startsWith(u8, ver, "GCC_")) continue; try global_ver_set.put(ver, undefined); const gop = try global_fn_set.getOrPut(name); if (gop.found_existing) { if (!std.mem.eql(u8, gop.entry.value.lib, "c")) { gop.entry.value.lib = lib_name; } } else { gop.entry.value = Function{ .name = name, .lib = lib_name, .index = undefined, }; } try fn_set.append(VersionedFn{ .ver = ver, .name = name, }); } } } const global_fn_list = blk: { var list = std.ArrayList([]const u8).init(allocator); var it = global_fn_set.iterator(); while (it.next()) |entry| try list.append(entry.key); std.sort.sort([]const u8, list.items, {}, strCmpLessThan); break :blk list.items; }; const global_ver_list = blk: { var list = std.ArrayList([]const u8).init(allocator); var it = global_ver_set.iterator(); while (it.next()) |entry| try list.append(entry.key); std.sort.sort([]const u8, list.items, {}, versionLessThan); break :blk list.items; }; { const vers_txt_path = try fs.path.join(allocator, &[_][]const u8{ glibc_out_dir, "vers.txt" }); const vers_txt_file = try fs.cwd().createFile(vers_txt_path, .{}); defer vers_txt_file.close(); var buffered = std.io.bufferedWriter(vers_txt_file.writer()); const vers_txt = buffered.writer(); for (global_ver_list) |name, i| { global_ver_set.put(name, i) catch unreachable; try vers_txt.print("{s}\n", .{name}); } try buffered.flush(); } { const fns_txt_path = try fs.path.join(allocator, &[_][]const u8{ glibc_out_dir, "fns.txt" }); const fns_txt_file = try fs.cwd().createFile(fns_txt_path, .{}); defer fns_txt_file.close(); var buffered = std.io.bufferedWriter(fns_txt_file.writer()); const fns_txt = buffered.writer(); for (global_fn_list) |name, i| { const entry = global_fn_set.getEntry(name).?; entry.value.index = i; try fns_txt.print("{s} {s}\n", .{ name, entry.value.lib }); } try buffered.flush(); } // Now the mapping of version and function to integer index is complete. // Here we create a mapping of function name to list of versions. for (abi_lists) |*abi_list, abi_index| { const entry = target_functions.getEntry(@ptrToInt(abi_list)).?; const fn_vers_list = &entry.value.fn_vers_list; for (entry.value.list.items) |*ver_fn| { const gop = try fn_vers_list.getOrPut(ver_fn.name); if (!gop.found_existing) { gop.entry.value = std.ArrayList(usize).init(allocator); } const ver_index = global_ver_set.getEntry(ver_fn.ver).?.value; if (std.mem.indexOfScalar(usize, gop.entry.value.items, ver_index) == null) { try gop.entry.value.append(ver_index); } } } { const abilist_txt_path = try fs.path.join(allocator, &[_][]const u8{ glibc_out_dir, "abi.txt" }); const abilist_txt_file = try fs.cwd().createFile(abilist_txt_path, .{}); defer abilist_txt_file.close(); var buffered = std.io.bufferedWriter(abilist_txt_file.writer()); const abilist_txt = buffered.writer(); // first iterate over the abi lists for (abi_lists) |*abi_list, abi_index| { const fn_vers_list = &target_functions.getEntry(@ptrToInt(abi_list)).?.value.fn_vers_list; for (abi_list.targets) |target, it_i| { if (it_i != 0) try abilist_txt.writeByte(' '); try abilist_txt.print("{s}-linux-{s}", .{ @tagName(target.arch), @tagName(target.abi) }); } try abilist_txt.writeByte('\n'); // next, each line implicitly corresponds to a function for (global_fn_list) |name| { const entry = fn_vers_list.getEntry(name) orelse { try abilist_txt.writeByte('\n'); continue; }; for (entry.value.items) |ver_index, it_i| { if (it_i != 0) try abilist_txt.writeByte(' '); try abilist_txt.print("{d}", .{ver_index}); } try abilist_txt.writeByte('\n'); } } try buffered.flush(); } } pub fn strCmpLessThan(context: void, a: []const u8, b: []const u8) bool { return std.mem.order(u8, a, b) == .lt; } pub fn versionLessThan(context: void, a: []const u8, b: []const u8) bool { const sep_chars = "GLIBC_."; var a_tokens = std.mem.tokenize(a, sep_chars); var b_tokens = std.mem.tokenize(b, sep_chars); while (true) { const a_next = a_tokens.next(); const b_next = b_tokens.next(); if (a_next == null and b_next == null) { return false; // equal means not less than } else if (a_next == null) { return true; } else if (b_next == null) { return false; } const a_int = fmt.parseInt(u64, a_next.?, 10) catch unreachable; const b_int = fmt.parseInt(u64, b_next.?, 10) catch unreachable; if (a_int < b_int) { return true; } else if (a_int > b_int) { return false; } } }