1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
|
//===--- AVR.cpp - AVR ToolChain Implementations ----------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "AVR.h"
#include "CommonArgs.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/InputInfo.h"
#include "clang/Driver/Options.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
namespace {
// NOTE: This list has been synchronized with gcc-avr 5.4.0 and avr-libc 2.0.0.
constexpr struct {
StringRef Name;
StringRef SubPath;
StringRef Family;
unsigned DataAddr;
} MCUInfo[] = {
{"at90s1200", "", "avr1", 0},
{"attiny11", "", "avr1", 0},
{"attiny12", "", "avr1", 0},
{"attiny15", "", "avr1", 0},
{"attiny28", "", "avr1", 0},
{"at90s2313", "tiny-stack", "avr2", 0x800060},
{"at90s2323", "tiny-stack", "avr2", 0x800060},
{"at90s2333", "tiny-stack", "avr2", 0x800060},
{"at90s2343", "tiny-stack", "avr2", 0x800060},
{"at90s4433", "tiny-stack", "avr2", 0x800060},
{"attiny22", "tiny-stack", "avr2", 0x800060},
{"attiny26", "tiny-stack", "avr2", 0x800060},
{"at90s4414", "", "avr2", 0x800060},
{"at90s4434", "", "avr2", 0x800060},
{"at90s8515", "", "avr2", 0x800060},
{"at90c8534", "", "avr2", 0x800060},
{"at90s8535", "", "avr2", 0x800060},
{"attiny13", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny13a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny2313", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny2313a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny24", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny24a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny25", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny261", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny261a", "avr25/tiny-stack", "avr25", 0x800060},
{"at86rf401", "avr25", "avr25", 0x800060},
{"ata5272", "avr25", "avr25", 0x800100},
{"attiny4313", "avr25", "avr25", 0x800060},
{"attiny44", "avr25", "avr25", 0x800060},
{"attiny44a", "avr25", "avr25", 0x800060},
{"attiny84", "avr25", "avr25", 0x800060},
{"attiny84a", "avr25", "avr25", 0x800060},
{"attiny45", "avr25", "avr25", 0x800060},
{"attiny85", "avr25", "avr25", 0x800060},
{"attiny441", "avr25", "avr25", 0x800100},
{"attiny461", "avr25", "avr25", 0x800060},
{"attiny461a", "avr25", "avr25", 0x800060},
{"attiny841", "avr25", "avr25", 0x800100},
{"attiny861", "avr25", "avr25", 0x800060},
{"attiny861a", "avr25", "avr25", 0x800060},
{"attiny87", "avr25", "avr25", 0x800100},
{"attiny43u", "avr25", "avr25", 0x800060},
{"attiny48", "avr25", "avr25", 0x800100},
{"attiny88", "avr25", "avr25", 0x800100},
{"attiny828", "avr25", "avr25", 0x800100},
{"at43usb355", "avr3", "avr3", 0x800100},
{"at76c711", "avr3", "avr3", 0x800060},
{"atmega103", "avr31", "avr31", 0x800060},
{"at43usb320", "avr31", "avr31", 0x800060},
{"attiny167", "avr35", "avr35", 0x800100},
{"at90usb82", "avr35", "avr35", 0x800100},
{"at90usb162", "avr35", "avr35", 0x800100},
{"ata5505", "avr35", "avr35", 0x800100},
{"ata6617c", "avr35", "avr35", 0x800100},
{"ata664251", "avr35", "avr35", 0x800100},
{"atmega8u2", "avr35", "avr35", 0x800100},
{"atmega16u2", "avr35", "avr35", 0x800100},
{"atmega32u2", "avr35", "avr35", 0x800100},
{"attiny1634", "avr35", "avr35", 0x800100},
{"atmega8", "avr4", "avr4", 0x800060},
{"ata6289", "avr4", "avr4", 0x800100},
{"atmega8a", "avr4", "avr4", 0x800060},
{"ata6285", "avr4", "avr4", 0x800100},
{"ata6286", "avr4", "avr4", 0x800100},
{"ata6612c", "avr4", "avr4", 0x800100},
{"atmega48", "avr4", "avr4", 0x800100},
{"atmega48a", "avr4", "avr4", 0x800100},
{"atmega48pa", "avr4", "avr4", 0x800100},
{"atmega48pb", "avr4", "avr4", 0x800100},
{"atmega48p", "avr4", "avr4", 0x800100},
{"atmega88", "avr4", "avr4", 0x800100},
{"atmega88a", "avr4", "avr4", 0x800100},
{"atmega88p", "avr4", "avr4", 0x800100},
{"atmega88pa", "avr4", "avr4", 0x800100},
{"atmega88pb", "avr4", "avr4", 0x800100},
{"atmega8515", "avr4", "avr4", 0x800060},
{"atmega8535", "avr4", "avr4", 0x800060},
{"atmega8hva", "avr4", "avr4", 0x800100},
{"at90pwm1", "avr4", "avr4", 0x800100},
{"at90pwm2", "avr4", "avr4", 0x800100},
{"at90pwm2b", "avr4", "avr4", 0x800100},
{"at90pwm3", "avr4", "avr4", 0x800100},
{"at90pwm3b", "avr4", "avr4", 0x800100},
{"at90pwm81", "avr4", "avr4", 0x800100},
{"ata5702m322", "avr5", "avr5", 0x800200},
{"ata5782", "avr5", "avr5", 0x800200},
{"ata5790", "avr5", "avr5", 0x800100},
{"ata5790n", "avr5", "avr5", 0x800100},
{"ata5791", "avr5", "avr5", 0x800100},
{"ata5795", "avr5", "avr5", 0x800100},
{"ata5831", "avr5", "avr5", 0x800200},
{"ata6613c", "avr5", "avr5", 0x800100},
{"ata6614q", "avr5", "avr5", 0x800100},
{"ata8210", "avr5", "avr5", 0x800200},
{"ata8510", "avr5", "avr5", 0x800200},
{"atmega16", "avr5", "avr5", 0x800060},
{"atmega16a", "avr5", "avr5", 0x800060},
{"atmega161", "avr5", "avr5", 0x800060},
{"atmega162", "avr5", "avr5", 0x800100},
{"atmega163", "avr5", "avr5", 0x800060},
{"atmega164a", "avr5", "avr5", 0x800100},
{"atmega164p", "avr5", "avr5", 0x800100},
{"atmega164pa", "avr5", "avr5", 0x800100},
{"atmega165", "avr5", "avr5", 0x800100},
{"atmega165a", "avr5", "avr5", 0x800100},
{"atmega165p", "avr5", "avr5", 0x800100},
{"atmega165pa", "avr5", "avr5", 0x800100},
{"atmega168", "avr5", "avr5", 0x800100},
{"atmega168a", "avr5", "avr5", 0x800100},
{"atmega168p", "avr5", "avr5", 0x800100},
{"atmega168pa", "avr5", "avr5", 0x800100},
{"atmega168pb", "avr5", "avr5", 0x800100},
{"atmega169", "avr5", "avr5", 0x800100},
{"atmega169a", "avr5", "avr5", 0x800100},
{"atmega169p", "avr5", "avr5", 0x800100},
{"atmega169pa", "avr5", "avr5", 0x800100},
{"atmega32", "avr5", "avr5", 0x800060},
{"atmega32a", "avr5", "avr5", 0x800060},
{"atmega323", "avr5", "avr5", 0x800060},
{"atmega324a", "avr5", "avr5", 0x800100},
{"atmega324p", "avr5", "avr5", 0x800100},
{"atmega324pa", "avr5", "avr5", 0x800100},
{"atmega325", "avr5", "avr5", 0x800100},
{"atmega325a", "avr5", "avr5", 0x800100},
{"atmega325p", "avr5", "avr5", 0x800100},
{"atmega325pa", "avr5", "avr5", 0x800100},
{"atmega3250", "avr5", "avr5", 0x800100},
{"atmega3250a", "avr5", "avr5", 0x800100},
{"atmega3250p", "avr5", "avr5", 0x800100},
{"atmega3250pa", "avr5", "avr5", 0x800100},
{"atmega328", "avr5", "avr5", 0x800100},
{"atmega328p", "avr5", "avr5", 0x800100},
{"atmega329", "avr5", "avr5", 0x800100},
{"atmega329a", "avr5", "avr5", 0x800100},
{"atmega329p", "avr5", "avr5", 0x800100},
{"atmega329pa", "avr5", "avr5", 0x800100},
{"atmega3290", "avr5", "avr5", 0x800100},
{"atmega3290a", "avr5", "avr5", 0x800100},
{"atmega3290p", "avr5", "avr5", 0x800100},
{"atmega3290pa", "avr5", "avr5", 0x800100},
{"atmega406", "avr5", "avr5", 0x800100},
{"atmega64", "avr5", "avr5", 0x800100},
{"atmega64a", "avr5", "avr5", 0x800100},
{"atmega640", "avr5", "avr5", 0x800200},
{"atmega644", "avr5", "avr5", 0x800100},
{"atmega644a", "avr5", "avr5", 0x800100},
{"atmega644p", "avr5", "avr5", 0x800100},
{"atmega644pa", "avr5", "avr5", 0x800100},
{"atmega645", "avr5", "avr5", 0x800100},
{"atmega645a", "avr5", "avr5", 0x800100},
{"atmega645p", "avr5", "avr5", 0x800100},
{"atmega649", "avr5", "avr5", 0x800100},
{"atmega649a", "avr5", "avr5", 0x800100},
{"atmega649p", "avr5", "avr5", 0x800100},
{"atmega6450", "avr5", "avr5", 0x800100},
{"atmega6450a", "avr5", "avr5", 0x800100},
{"atmega6450p", "avr5", "avr5", 0x800100},
{"atmega6490", "avr5", "avr5", 0x800100},
{"atmega6490a", "avr5", "avr5", 0x800100},
{"atmega6490p", "avr5", "avr5", 0x800100},
{"atmega64rfr2", "avr5", "avr5", 0x800200},
{"atmega644rfr2", "avr5", "avr5", 0x800200},
{"atmega16hva", "avr5", "avr5", 0x800100},
{"atmega16hva2", "avr5", "avr5", 0x800100},
{"atmega16hvb", "avr5", "avr5", 0x800100},
{"atmega16hvbrevb", "avr5", "avr5", 0x800100},
{"atmega32hvb", "avr5", "avr5", 0x800100},
{"atmega32hvbrevb", "avr5", "avr5", 0x800100},
{"atmega64hve", "avr5", "avr5", 0x800100},
{"atmega64hve2", "avr5", "avr5", 0x800100},
{"at90can32", "avr5", "avr5", 0x800100},
{"at90can64", "avr5", "avr5", 0x800100},
{"at90pwm161", "avr5", "avr5", 0x800100},
{"at90pwm216", "avr5", "avr5", 0x800100},
{"at90pwm316", "avr5", "avr5", 0x800100},
{"atmega32c1", "avr5", "avr5", 0x800100},
{"atmega64c1", "avr5", "avr5", 0x800100},
{"atmega16m1", "avr5", "avr5", 0x800100},
{"atmega32m1", "avr5", "avr5", 0x800100},
{"atmega64m1", "avr5", "avr5", 0x800100},
{"atmega16u4", "avr5", "avr5", 0x800100},
{"atmega32u4", "avr5", "avr5", 0x800100},
{"atmega32u6", "avr5", "avr5", 0x800100},
{"at90usb646", "avr5", "avr5", 0x800100},
{"at90usb647", "avr5", "avr5", 0x800100},
{"at90scr100", "avr5", "avr5", 0x800100},
{"at94k", "avr5", "avr5", 0x800060},
{"m3000", "avr5", "avr5", 0x800060},
{"atmega128", "avr51", "avr51", 0x800100},
{"atmega128a", "avr51", "avr51", 0x800100},
{"atmega1280", "avr51", "avr51", 0x800200},
{"atmega1281", "avr51", "avr51", 0x800200},
{"atmega1284", "avr51", "avr51", 0x800100},
{"atmega1284p", "avr51", "avr51", 0x800100},
{"atmega128rfa1", "avr51", "avr51", 0x800200},
{"atmega128rfr2", "avr51", "avr51", 0x800200},
{"atmega1284rfr2", "avr51", "avr51", 0x800200},
{"at90can128", "avr51", "avr51", 0x800200},
{"at90usb1286", "avr51", "avr51", 0x800200},
{"at90usb1287", "avr51", "avr51", 0x800200},
{"atmega2560", "avr6", "avr6", 0x800200},
{"atmega2561", "avr6", "avr6", 0x800200},
{"atmega256rfr2", "avr6", "avr6", 0x800200},
{"atmega2564rfr2", "avr6", "avr6", 0x800200},
{"attiny4", "avrtiny", "avrtiny", 0x800040},
{"attiny5", "avrtiny", "avrtiny", 0x800040},
{"attiny9", "avrtiny", "avrtiny", 0x800040},
{"attiny10", "avrtiny", "avrtiny", 0x800040},
{"attiny20", "avrtiny", "avrtiny", 0x800040},
{"attiny40", "avrtiny", "avrtiny", 0x800040},
{"atxmega16a4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16a4u", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16c4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16d4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32a4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32a4u", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32c3", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32c4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32d3", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32d4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega8e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega64a3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a3u", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a4u", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64b1", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64b3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64c3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64d3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64d4", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a1", "avrxmega5", "avrxmega5", 0x802000},
{"atxmega64a1u", "avrxmega5", "avrxmega5", 0x802000},
{"atxmega128a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128b1", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128b3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128d4", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3b", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3bu", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega384c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega384d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128a1", "avrxmega7", "avrxmega7", 0x802000},
{"atxmega128a1u", "avrxmega7", "avrxmega7", 0x802000},
{"atxmega128a4u", "avrxmega7", "avrxmega7", 0x802000},
};
std::string GetMCUSubPath(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName)
return std::string(MCU.SubPath);
return "";
}
llvm::Optional<StringRef> GetMCUFamilyName(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName)
return Optional<StringRef>(MCU.Family);
return Optional<StringRef>();
}
llvm::Optional<unsigned> GetMCUSectionAddressData(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName && MCU.DataAddr > 0)
return Optional<unsigned>(MCU.DataAddr);
return Optional<unsigned>();
}
const StringRef PossibleAVRLibcLocations[] = {
"/avr",
"/usr/avr",
"/usr/lib/avr",
};
} // end anonymous namespace
/// AVR Toolchain
AVRToolChain::AVRToolChain(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: Generic_ELF(D, Triple, Args), LinkStdlib(false) {
GCCInstallation.init(Triple, Args);
// Only add default libraries if the user hasn't explicitly opted out.
if (!Args.hasArg(options::OPT_nostdlib) &&
!Args.hasArg(options::OPT_nodefaultlibs) &&
!Args.hasArg(options::OPT_c /* does not apply when not linking */)) {
std::string CPU = getCPUName(D, Args, Triple);
if (CPU.empty()) {
// We cannot link any standard libraries without an MCU specified.
D.Diag(diag::warn_drv_avr_mcu_not_specified);
} else {
Optional<StringRef> FamilyName = GetMCUFamilyName(CPU);
Optional<std::string> AVRLibcRoot = findAVRLibcInstallation();
if (!FamilyName.hasValue()) {
// We do not have an entry for this CPU in the family
// mapping table yet.
D.Diag(diag::warn_drv_avr_family_linking_stdlibs_not_implemented)
<< CPU;
} else if (!GCCInstallation.isValid()) {
// No avr-gcc found and so no runtime linked.
D.Diag(diag::warn_drv_avr_gcc_not_found);
} else if (!AVRLibcRoot.hasValue()) {
// No avr-libc found and so no runtime linked.
D.Diag(diag::warn_drv_avr_libc_not_found);
} else { // We have enough information to link stdlibs
std::string GCCRoot(GCCInstallation.getInstallPath());
std::string GCCParentPath(GCCInstallation.getParentLibPath());
std::string LibcRoot = AVRLibcRoot.getValue();
std::string SubPath = GetMCUSubPath(CPU);
getProgramPaths().push_back(GCCParentPath + "/../bin");
getFilePaths().push_back(LibcRoot + std::string("/lib/") + SubPath);
getFilePaths().push_back(GCCRoot + std::string("/") + SubPath);
LinkStdlib = true;
}
}
if (!LinkStdlib)
D.Diag(diag::warn_drv_avr_stdlib_not_linked);
}
}
void AVRToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
if (DriverArgs.hasArg(options::OPT_nostdinc) ||
DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
// Omit if there is no avr-libc installed.
Optional<std::string> AVRLibcRoot = findAVRLibcInstallation();
if (!AVRLibcRoot.hasValue())
return;
// Add 'avr-libc/include' to clang system include paths if applicable.
std::string AVRInc = AVRLibcRoot.getValue() + "/include";
if (llvm::sys::fs::is_directory(AVRInc))
addSystemInclude(DriverArgs, CC1Args, AVRInc);
}
void AVRToolChain::addClangTargetOptions(
const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
Action::OffloadKind DeviceOffloadKind) const {
// By default, use `.ctors` (not `.init_array`), as required by libgcc, which
// runs constructors/destructors on AVR.
if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
options::OPT_fno_use_init_array, false))
CC1Args.push_back("-fno-use-init-array");
// Use `-fno-use-cxa-atexit` as default, since avr-libc does not support
// `__cxa_atexit()`.
if (!DriverArgs.hasFlag(options::OPT_fuse_cxa_atexit,
options::OPT_fno_use_cxa_atexit, false))
CC1Args.push_back("-fno-use-cxa-atexit");
}
Tool *AVRToolChain::buildLinker() const {
return new tools::AVR::Linker(getTriple(), *this, LinkStdlib);
}
void AVR::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs, const ArgList &Args,
const char *LinkingOutput) const {
const Driver &D = getToolChain().getDriver();
// Compute information about the target AVR.
std::string CPU = getCPUName(D, Args, getToolChain().getTriple());
llvm::Optional<StringRef> FamilyName = GetMCUFamilyName(CPU);
llvm::Optional<unsigned> SectionAddressData = GetMCUSectionAddressData(CPU);
std::string Linker = getToolChain().GetProgramPath(getShortName());
ArgStringList CmdArgs;
AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
// Enable garbage collection of unused sections.
CmdArgs.push_back("--gc-sections");
// Add library search paths before we specify libraries.
Args.AddAllArgs(CmdArgs, options::OPT_L);
getToolChain().AddFilePathLibArgs(Args, CmdArgs);
if (SectionAddressData.hasValue()) {
std::string DataSectionArg = std::string("-Tdata=0x") +
llvm::utohexstr(SectionAddressData.getValue());
CmdArgs.push_back(Args.MakeArgString(DataSectionArg));
} else {
// We do not have an entry for this CPU in the address mapping table yet.
D.Diag(diag::warn_drv_avr_linker_section_addresses_not_implemented) << CPU;
}
// If the family name is known, we can link with the device-specific libgcc.
// Without it, libgcc will simply not be linked. This matches avr-gcc
// behavior.
if (LinkStdlib) {
assert(!CPU.empty() && "CPU name must be known in order to link stdlibs");
CmdArgs.push_back("--start-group");
// Add the object file for the CRT.
std::string CrtFileName = std::string("-l:crt") + CPU + std::string(".o");
CmdArgs.push_back(Args.MakeArgString(CrtFileName));
CmdArgs.push_back("-lgcc");
CmdArgs.push_back("-lm");
CmdArgs.push_back("-lc");
// Add the link library specific to the MCU.
CmdArgs.push_back(Args.MakeArgString(std::string("-l") + CPU));
CmdArgs.push_back("--end-group");
// Specify the family name as the emulation mode to use.
// This is almost always required because otherwise avr-ld
// will assume 'avr2' and warn about the program being larger
// than the bare minimum supports.
CmdArgs.push_back(Args.MakeArgString(std::string("-m") + *FamilyName));
}
C.addCommand(std::make_unique<Command>(
JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
CmdArgs, Inputs, Output));
}
llvm::Optional<std::string> AVRToolChain::findAVRLibcInstallation() const {
// Search avr-libc installation according to avr-gcc installation.
std::string GCCParent(GCCInstallation.getParentLibPath());
std::string Path(GCCParent + "/avr");
if (llvm::sys::fs::is_directory(Path))
return Path;
Path = GCCParent + "/../avr";
if (llvm::sys::fs::is_directory(Path))
return Path;
// Search avr-libc installation from possible locations, and return the first
// one that exists, if there is no avr-gcc installed.
for (StringRef PossiblePath : PossibleAVRLibcLocations) {
std::string Path = getDriver().SysRoot + PossiblePath.str();
if (llvm::sys::fs::is_directory(Path))
return Path;
}
return llvm::None;
}
|
