authorgravatar for andrew@ziglang.orgAndrew Kelley <andrew@ziglang.org> 2021-09-07 15:12:00-04:00
committergravatar for noreply@github.comGitHub <noreply@github.com> 2021-09-07 15:12:00-04:00
logd305ba7f2d5ae524fd71365852fb5196e98fdbaf
treec8430ead46207fdecc5cfb3d0a2333e9afac477b
parent3d5ff91441040d11cca814f298231a501700da9e
parent742fe65f3ea4390acf7ed6beec95f910f56e1246
signaturebadge-question-mark Signed by PGP key 4AEE18F83AFDEB23

Merge pull request #9636 from ehaas/hexfiles

stdlib: Add Intel HEX support to InstallRawStep

5 files changed, 414 insertions(+), 6 deletions(-)

lib/std/build.zig+14-1
......@@ -989,10 +989,15 @@ pub const Builder = struct {
989989 self.getInstallStep().dependOn(&self.addInstallFileWithDir(.{ .path = src_path }, .lib, dest_rel_path).step);
990990 }
991991
992 /// Output format (BIN vs Intel HEX) determined by filename
992993 pub fn installRaw(self: *Builder, artifact: *LibExeObjStep, dest_filename: []const u8) void {
993994 self.getInstallStep().dependOn(&self.addInstallRaw(artifact, dest_filename).step);
994995 }
995996
997 pub fn installRawWithFormat(self: *Builder, artifact: *LibExeObjStep, dest_filename: []const u8, format: InstallRawStep.RawFormat) void {
998 self.getInstallStep().dependOn(&self.addInstallRawWithFormat(artifact, dest_filename, format).step);
999 }
1000
9961001 ///`dest_rel_path` is relative to install prefix path
9971002 pub fn addInstallFile(self: *Builder, source: FileSource, dest_rel_path: []const u8) *InstallFileStep {
9981003 return self.addInstallFileWithDir(source.dupe(self), .prefix, dest_rel_path);
......@@ -1009,7 +1014,11 @@ pub const Builder = struct {
10091014 }
10101015
10111016 pub fn addInstallRaw(self: *Builder, artifact: *LibExeObjStep, dest_filename: []const u8) *InstallRawStep {
1012 return InstallRawStep.create(self, artifact, dest_filename);
1017 return InstallRawStep.create(self, artifact, dest_filename, null);
1018 }
1019
1020 pub fn addInstallRawWithFormat(self: *Builder, artifact: *LibExeObjStep, dest_filename: []const u8, format: InstallRawStep.RawFormat) *InstallRawStep {
1021 return InstallRawStep.create(self, artifact, dest_filename, format);
10131022 }
10141023
10151024 pub fn addInstallFileWithDir(
......@@ -1709,6 +1718,10 @@ pub const LibExeObjStep = struct {
17091718 self.builder.installRaw(self, dest_filename);
17101719 }
17111720
1721 pub fn installRawWithFormat(self: *LibExeObjStep, dest_filename: []const u8, format: InstallRawStep.RawFormat) void {
1722 self.builder.installRawWithFormat(self, dest_filename, format);
1723 }
1724
17121725 /// Creates a `RunStep` with an executable built with `addExecutable`.
17131726 /// Add command line arguments with `addArg`.
17141727 pub fn run(exe: *LibExeObjStep) *RunStep {
lib/std/build/InstallRawStep.zig+223-5
......@@ -159,7 +159,147 @@ fn writeBinaryElfSection(elf_file: File, out_file: File, section: *BinaryElfSect
159159 });
160160}
161161
162fn emitRaw(allocator: *Allocator, elf_path: []const u8, raw_path: []const u8) !void {
162const HexWriter = struct {
163 prev_addr: ?u32 = null,
164 out_file: File,
165
166 /// Max data bytes per line of output
167 const MAX_PAYLOAD_LEN: u8 = 16;
168
169 fn addressParts(address: u16) [2]u8 {
170 const msb = @truncate(u8, address >> 8);
171 const lsb = @truncate(u8, address);
172 return [2]u8{ msb, lsb };
173 }
174
175 const Record = struct {
176 const Type = enum(u8) {
177 Data = 0,
178 EOF = 1,
179 ExtendedSegmentAddress = 2,
180 ExtendedLinearAddress = 4,
181 };
182
183 address: u16,
184 payload: union(Type) {
185 Data: []const u8,
186 EOF: void,
187 ExtendedSegmentAddress: [2]u8,
188 ExtendedLinearAddress: [2]u8,
189 },
190
191 fn EOF() Record {
192 return Record{
193 .address = 0,
194 .payload = .EOF,
195 };
196 }
197
198 fn Data(address: u32, data: []const u8) Record {
199 return Record{
200 .address = @intCast(u16, address % 0x10000),
201 .payload = .{ .Data = data },
202 };
203 }
204
205 fn Address(address: u32) Record {
206 std.debug.assert(address > 0xFFFF);
207 const segment = @intCast(u16, address / 0x10000);
208 if (address > 0xFFFFF) {
209 return Record{
210 .address = 0,
211 .payload = .{ .ExtendedLinearAddress = addressParts(segment) },
212 };
213 } else {
214 return Record{
215 .address = 0,
216 .payload = .{ .ExtendedSegmentAddress = addressParts(segment << 12) },
217 };
218 }
219 }
220
221 fn getPayloadBytes(self: Record) []const u8 {
222 return switch (self.payload) {
223 .Data => |d| d,
224 .EOF => @as([]const u8, &.{}),
225 .ExtendedSegmentAddress, .ExtendedLinearAddress => |*seg| seg,
226 };
227 }
228
229 fn checksum(self: Record) u8 {
230 const payload_bytes = self.getPayloadBytes();
231
232 var sum: u8 = @intCast(u8, payload_bytes.len);
233 const parts = addressParts(self.address);
234 sum +%= parts[0];
235 sum +%= parts[1];
236 sum +%= @enumToInt(self.payload);
237 for (payload_bytes) |byte| {
238 sum +%= byte;
239 }
240 return (sum ^ 0xFF) +% 1;
241 }
242
243 fn write(self: Record, file: File) File.WriteError!void {
244 const linesep = "\r\n";
245 // colon, (length, address, type, payload, checksum) as hex, CRLF
246 const BUFSIZE = 1 + (1 + 2 + 1 + MAX_PAYLOAD_LEN + 1) * 2 + linesep.len;
247 var outbuf: [BUFSIZE]u8 = undefined;
248 const payload_bytes = self.getPayloadBytes();
249 std.debug.assert(payload_bytes.len <= MAX_PAYLOAD_LEN);
250
251 const line = try std.fmt.bufPrint(&outbuf, ":{0X:0>2}{1X:0>4}{2X:0>2}{3s}{4X:0>2}" ++ linesep, .{
252 @intCast(u8, payload_bytes.len),
253 self.address,
254 @enumToInt(self.payload),
255 std.fmt.fmtSliceHexUpper(payload_bytes),
256 self.checksum(),
257 });
258 try file.writeAll(line);
259 }
260 };
261
262 pub fn writeSegment(self: *HexWriter, segment: *const BinaryElfSegment, elf_file: File) !void {
263 var buf: [MAX_PAYLOAD_LEN]u8 = undefined;
264 var bytes_read: usize = 0;
265 while (bytes_read < segment.fileSize) {
266 const row_address = @intCast(u32, segment.physicalAddress + bytes_read);
267
268 const remaining = segment.fileSize - bytes_read;
269 const to_read = @minimum(remaining, MAX_PAYLOAD_LEN);
270 const did_read = try elf_file.preadAll(buf[0..to_read], segment.elfOffset + bytes_read);
271 if (did_read < to_read) return error.UnexpectedEOF;
272
273 try self.writeDataRow(row_address, buf[0..did_read]);
274
275 bytes_read += did_read;
276 }
277 }
278
279 fn writeDataRow(self: *HexWriter, address: u32, data: []const u8) File.WriteError!void {
280 const record = Record.Data(address, data);
281 if (address > 0xFFFF and (self.prev_addr == null or record.address != self.prev_addr.?)) {
282 try Record.Address(address).write(self.out_file);
283 }
284 try record.write(self.out_file);
285 self.prev_addr = @intCast(u32, record.address + data.len);
286 }
287
288 fn writeEOF(self: HexWriter) File.WriteError!void {
289 try Record.EOF().write(self.out_file);
290 }
291};
292
293fn containsValidAddressRange(segments: []*BinaryElfSegment) bool {
294 const max_address = std.math.maxInt(u32);
295 for (segments) |segment| {
296 if (segment.fileSize > max_address or
297 segment.physicalAddress > max_address - segment.fileSize) return false;
298 }
299 return true;
300}
301
302fn emitRaw(allocator: *Allocator, elf_path: []const u8, raw_path: []const u8, format: RawFormat) !void {
163303 var elf_file = try fs.cwd().openFile(elf_path, .{});
164304 defer elf_file.close();
165305
......@@ -169,8 +309,26 @@ fn emitRaw(allocator: *Allocator, elf_path: []const u8, raw_path: []const u8) !v
169309 var binary_elf_output = try BinaryElfOutput.parse(allocator, elf_file);
170310 defer binary_elf_output.deinit();
171311
172 for (binary_elf_output.sections.items) |section| {
173 try writeBinaryElfSection(elf_file, out_file, section);
312 switch (format) {
313 .bin => {
314 for (binary_elf_output.sections.items) |section| {
315 try writeBinaryElfSection(elf_file, out_file, section);
316 }
317 },
318 .hex => {
319 if (binary_elf_output.segments.items.len == 0) return;
320 if (!containsValidAddressRange(binary_elf_output.segments.items)) {
321 return error.InvalidHexfileAddressRange;
322 }
323
324 var hex_writer = HexWriter{ .out_file = out_file };
325 for (binary_elf_output.sections.items) |section| {
326 if (section.segment) |segment| {
327 try hex_writer.writeSegment(segment, elf_file);
328 }
329 }
330 try hex_writer.writeEOF();
331 },
174332 }
175333}
176334
......@@ -178,13 +336,27 @@ const InstallRawStep = @This();
178336
179337pub const base_id = .install_raw;
180338
339pub const RawFormat = enum {
340 bin,
341 hex,
342};
343
181344step: Step,
182345builder: *Builder,
183346artifact: *LibExeObjStep,
184347dest_dir: InstallDir,
185348dest_filename: []const u8,
349format: RawFormat,
350output_file: std.build.GeneratedFile,
351
352fn detectFormat(filename: []const u8) RawFormat {
353 if (std.mem.endsWith(u8, filename, ".hex") or std.mem.endsWith(u8, filename, ".ihex")) {
354 return .hex;
355 }
356 return .bin;
357}
186358
187pub fn create(builder: *Builder, artifact: *LibExeObjStep, dest_filename: []const u8) *InstallRawStep {
359pub fn create(builder: *Builder, artifact: *LibExeObjStep, dest_filename: []const u8, format: ?RawFormat) *InstallRawStep {
188360 const self = builder.allocator.create(InstallRawStep) catch unreachable;
189361 self.* = InstallRawStep{
190362 .step = Step.init(.install_raw, builder.fmt("install raw binary {s}", .{artifact.step.name}), builder.allocator, make),
......@@ -197,6 +369,8 @@ pub fn create(builder: *Builder, artifact: *LibExeObjStep, dest_filename: []cons
197369 .lib => unreachable,
198370 },
199371 .dest_filename = dest_filename,
372 .format = format orelse detectFormat(dest_filename),
373 .output_file = std.build.GeneratedFile{ .step = &self.step },
200374 };
201375 self.step.dependOn(&artifact.step);
202376
......@@ -204,6 +378,10 @@ pub fn create(builder: *Builder, artifact: *LibExeObjStep, dest_filename: []cons
204378 return self;
205379}
206380
381pub fn getOutputSource(self: *const InstallRawStep) std.build.FileSource {
382 return std.build.FileSource{ .generated = &self.output_file };
383}
384
207385fn make(step: *Step) !void {
208386 const self = @fieldParentPtr(InstallRawStep, "step", step);
209387 const builder = self.builder;
......@@ -217,9 +395,49 @@ fn make(step: *Step) !void {
217395 const full_dest_path = builder.getInstallPath(self.dest_dir, self.dest_filename);
218396
219397 fs.cwd().makePath(builder.getInstallPath(self.dest_dir, "")) catch unreachable;
220 try emitRaw(builder.allocator, full_src_path, full_dest_path);
398 try emitRaw(builder.allocator, full_src_path, full_dest_path, self.format);
399 self.output_file.path = full_dest_path;
221400}
222401
223402test {
224403 std.testing.refAllDecls(InstallRawStep);
225404}
405
406test "Detect format from filename" {
407 try std.testing.expectEqual(RawFormat.hex, detectFormat("foo.hex"));
408 try std.testing.expectEqual(RawFormat.hex, detectFormat("foo.ihex"));
409 try std.testing.expectEqual(RawFormat.bin, detectFormat("foo.bin"));
410 try std.testing.expectEqual(RawFormat.bin, detectFormat("foo.bar"));
411 try std.testing.expectEqual(RawFormat.bin, detectFormat("a"));
412}
413
414test "containsValidAddressRange" {
415 var segment = BinaryElfSegment{
416 .physicalAddress = 0,
417 .virtualAddress = 0,
418 .elfOffset = 0,
419 .binaryOffset = 0,
420 .fileSize = 0,
421 .firstSection = null,
422 };
423 var buf: [1]*BinaryElfSegment = .{&segment};
424
425 // segment too big
426 segment.fileSize = std.math.maxInt(u32) + 1;
427 try std.testing.expect(!containsValidAddressRange(&buf));
428
429 // start address too big
430 segment.physicalAddress = std.math.maxInt(u32) + 1;
431 segment.fileSize = 2;
432 try std.testing.expect(!containsValidAddressRange(&buf));
433
434 // max address too big
435 segment.physicalAddress = std.math.maxInt(u32) - 1;
436 segment.fileSize = 2;
437 try std.testing.expect(!containsValidAddressRange(&buf));
438
439 // is ok
440 segment.physicalAddress = std.math.maxInt(u32) - 1;
441 segment.fileSize = 1;
442 try std.testing.expect(containsValidAddressRange(&buf));
443}
test/standalone.zig+1
......@@ -27,6 +27,7 @@ pub fn addCases(cases: *tests.StandaloneContext) void {
2727 cases.addBuildFile("test/standalone/brace_expansion/build.zig", .{});
2828 cases.addBuildFile("test/standalone/empty_env/build.zig", .{});
2929 cases.addBuildFile("test/standalone/issue_7030/build.zig", .{});
30 cases.addBuildFile("test/standalone/install_raw_hex/build.zig", .{});
3031 if (std.Target.current.os.tag != .wasi) {
3132 cases.addBuildFile("test/standalone/load_dynamic_library/build.zig", .{});
3233 }
test/standalone/install_raw_hex/build.zig created+173
......@@ -0,0 +1,173 @@
1const Builder = @import("std").build.Builder;
2const builtin = @import("builtin");
3const std = @import("std");
4const CheckFileStep = std.build.CheckFileStep;
5
6pub fn build(b: *Builder) void {
7 const target = .{
8 .cpu_arch = .thumb,
9 .cpu_model = .{ .explicit = &std.Target.arm.cpu.cortex_m4 },
10 .os_tag = .freestanding,
11 .abi = .gnueabihf,
12 };
13
14 const mode = b.standardReleaseOptions();
15
16 const elf = b.addExecutable("zig-nrf52-blink.elf", "main.zig");
17 elf.setTarget(target);
18 elf.setBuildMode(mode);
19
20 const test_step = b.step("test", "Test the program");
21 b.default_step.dependOn(test_step);
22
23 const hex_step = b.addInstallRaw(elf, "hello.hex");
24 test_step.dependOn(&hex_step.step);
25
26 const explicit_format_hex_step = b.addInstallRawWithFormat(elf, "hello.foo", .hex);
27 test_step.dependOn(&explicit_format_hex_step.step);
28
29 const expected_hex = &[_][]const u8{
30 ":020000021000EC",
31 ":1000D400D001010001000000D20101000100000074",
32 ":1000E40028020100010000002402010001000000B8",
33 ":1000F4003A02010001000000E202010001000000D8",
34 ":100104000C03010001000000A50202000000000031",
35 ":1001140000000000000000000000000000000000DB",
36 ":1001240000000000000000000000000000000000CB",
37 ":1001340000000000000000000000000000000000BB",
38 ":10014400AF02020098020100090000004D02010004",
39 ":100154000900000001000000000000000000000091",
40 ":100164000004000100C0800000020000080000003C",
41 ":100174000000000000000000000000001E0000005D",
42 ":1001840048010100000040888080FF000A14002913",
43 ":1001940000C0B00000020090080000000000000051",
44 ":1001A40000000000000000001E000000000000002D",
45 ":1001B400000000000000000000000000000000003B",
46 ":1001C400000000000000000000000000000000002B",
47 ":1001D400000000000000000000000000000000001B",
48 ":1001E400000000000000000000000000000000000B",
49 ":1001F4000000000000000000000000008702010071",
50 ":1002040010000000200201002C0000006B0201001D",
51 ":100214001B000000570201001300000072656D61AD",
52 ":10022400696E646572206469766973696F6E2062B1",
53 ":1002340079207A65726F206F72206E6567617469C8",
54 ":1002440076652076616C756500636F727465782DD0",
55 ":100254006D3400696E646578206F7574206F662054",
56 ":10026400626F756E647300696E746567657220638E",
57 ":10027400617374207472756E63617465642062695D",
58 ":100284007473006469766973696F6E206279207A89",
59 ":1002940065726F00636F727465785F6D340000007F",
60 ":1002A40081B00091FFE700BEFDE7D0B502AF90B08A",
61 ":1002B4000391029007A800F029F803990020069002",
62 ":1002C40048680490FFE704990698019088420FD289",
63 ":1002D400FFE7019903980068405C07F8310C17F8B0",
64 ":1002E400311C07A800F021F8019801300690EAE7D4",
65 ":1002F400029807A9B1E80C50A0E80C5091E81C50F2",
66 ":1003040080E81C5010B0D0BDFFE7FEE7D0B502AFC7",
67 ":1003140040F2DC11C0F20101B1E80C50A0E80C502D",
68 ":1003240091E81C5080E81C50D0BD80B56F4688B061",
69 ":1003340006906FF35F2127F80A1C37F80A0C049023",
70 ":10034400012038B9FFE740F20020C0F2010000218B",
71 ":10035400FFF7A6FF0498C0F3431027F8020C37F800",
72 ":100364000A0C0390002038B9FFE7039800F01F003F",
73 ":100374000290012038B914E040F20820C0F20100D4",
74 ":100384000021FFF78DFF029800F01F0007F8030C0F",
75 ":100394000698009037F8020C0146019109280ED303",
76 ":1003A40006E040F21020C0F201000021FFF778FFC0",
77 ":1003B40040F21820C0F201000021FFF771FF0099FC",
78 ":1003C400019A51F8220017F803CC012303FA0CF325",
79 ":1003D400184341F8220008B080BD81B000F03F000E",
80 ":1003E4008DF802009DF80200103000F03F00022852",
81 ":1003F40004D3FFE700208DF8030003E001208DF80B",
82 ":100404000300FFE79DF8030001B070470A000000F5",
83 ":1004140012000000020071001200000066000000DB",
84 ":1004240003007D0C06000000000000000001110123",
85 ":10043400250E1305030E10171B0EB44219110112D9",
86 ":0604440006000002340076",
87 ":020000021000EC",
88 ":1000D400D001010001000000D20101000100000074",
89 ":1000E40028020100010000002402010001000000B8",
90 ":1000F4003A02010001000000E202010001000000D8",
91 ":100104000C03010001000000A50202000000000031",
92 ":1001140000000000000000000000000000000000DB",
93 ":1001240000000000000000000000000000000000CB",
94 ":1001340000000000000000000000000000000000BB",
95 ":10014400AF02020098020100090000004D02010004",
96 ":100154000900000001000000000000000000000091",
97 ":100164000004000100C0800000020000080000003C",
98 ":100174000000000000000000000000001E0000005D",
99 ":1001840048010100000040888080FF000A14002913",
100 ":1001940000C0B00000020090080000000000000051",
101 ":1001A40000000000000000001E000000000000002D",
102 ":1001B400000000000000000000000000000000003B",
103 ":1001C400000000000000000000000000000000002B",
104 ":1001D400000000000000000000000000000000001B",
105 ":1001E400000000000000000000000000000000000B",
106 ":1001F4000000000000000000000000008702010071",
107 ":1002040010000000200201002C0000006B0201001D",
108 ":100214001B000000570201001300000072656D61AD",
109 ":10022400696E646572206469766973696F6E2062B1",
110 ":1002340079207A65726F206F72206E6567617469C8",
111 ":1002440076652076616C756500636F727465782DD0",
112 ":100254006D3400696E646578206F7574206F662054",
113 ":10026400626F756E647300696E746567657220638E",
114 ":10027400617374207472756E63617465642062695D",
115 ":100284007473006469766973696F6E206279207A89",
116 ":1002940065726F00636F727465785F6D340000007F",
117 ":1002A40081B00091FFE700BEFDE7D0B502AF90B08A",
118 ":1002B4000391029007A800F029F803990020069002",
119 ":1002C40048680490FFE704990698019088420FD289",
120 ":1002D400FFE7019903980068405C07F8310C17F8B0",
121 ":1002E400311C07A800F021F8019801300690EAE7D4",
122 ":1002F400029807A9B1E80C50A0E80C5091E81C50F2",
123 ":1003040080E81C5010B0D0BDFFE7FEE7D0B502AFC7",
124 ":1003140040F2DC11C0F20101B1E80C50A0E80C502D",
125 ":1003240091E81C5080E81C50D0BD80B56F4688B061",
126 ":1003340006906FF35F2127F80A1C37F80A0C049023",
127 ":10034400012038B9FFE740F20020C0F2010000218B",
128 ":10035400FFF7A6FF0498C0F3431027F8020C37F800",
129 ":100364000A0C0390002038B9FFE7039800F01F003F",
130 ":100374000290012038B914E040F20820C0F20100D4",
131 ":100384000021FFF78DFF029800F01F0007F8030C0F",
132 ":100394000698009037F8020C0146019109280ED303",
133 ":1003A40006E040F21020C0F201000021FFF778FFC0",
134 ":1003B40040F21820C0F201000021FFF771FF0099FC",
135 ":1003C400019A51F8220017F803CC012303FA0CF325",
136 ":1003D400184341F8220008B080BD81B000F03F000E",
137 ":1003E4008DF802009DF80200103000F03F00022852",
138 ":1003F40004D3FFE700208DF8030003E001208DF80B",
139 ":100404000300FFE79DF8030001B070470A000000F5",
140 ":1004140012000000020071001200000066000000DB",
141 ":1004240003007D0C06000000000000000001110123",
142 ":10043400250E1305030E10171B0EB44219110112D9",
143 ":0604440006000002340076",
144 ":020000022000DC",
145 ":1002A40081B00091FFE700BEFDE7D0B502AF90B08A",
146 ":1002B4000391029007A800F029F803990020069002",
147 ":1002C40048680490FFE704990698019088420FD289",
148 ":1002D400FFE7019903980068405C07F8310C17F8B0",
149 ":1002E400311C07A800F021F8019801300690EAE7D4",
150 ":1002F400029807A9B1E80C50A0E80C5091E81C50F2",
151 ":1003040080E81C5010B0D0BDFFE7FEE7D0B502AFC7",
152 ":1003140040F2DC11C0F20101B1E80C50A0E80C502D",
153 ":1003240091E81C5080E81C50D0BD80B56F4688B061",
154 ":1003340006906FF35F2127F80A1C37F80A0C049023",
155 ":10034400012038B9FFE740F20020C0F2010000218B",
156 ":10035400FFF7A6FF0498C0F3431027F8020C37F800",
157 ":100364000A0C0390002038B9FFE7039800F01F003F",
158 ":100374000290012038B914E040F20820C0F20100D4",
159 ":100384000021FFF78DFF029800F01F0007F8030C0F",
160 ":100394000698009037F8020C0146019109280ED303",
161 ":1003A40006E040F21020C0F201000021FFF778FFC0",
162 ":1003B40040F21820C0F201000021FFF771FF0099FC",
163 ":1003C400019A51F8220017F803CC012303FA0CF325",
164 ":1003D400184341F8220008B080BD81B000F03F000E",
165 ":1003E4008DF802009DF80200103000F03F00022852",
166 ":1003F40004D3FFE700208DF8030003E001208DF80B",
167 ":0C0404000300FFE79DF8030001B0704703",
168 ":00000001FF",
169 };
170
171 test_step.dependOn(&CheckFileStep.create(b, hex_step.getOutputSource(), expected_hex).step);
172 test_step.dependOn(&CheckFileStep.create(b, explicit_format_hex_step.getOutputSource(), expected_hex).step);
173}
test/standalone/install_raw_hex/main.zig created+3
......@@ -0,0 +1,3 @@
1export fn _start() callconv(.C) noreturn {
2 while (true) {}
3}