/
Gnu.cpp
3008 lines (2681 loc) · 117 KB
/
Gnu.cpp
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
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//===--- Gnu.cpp - Gnu Tool and 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 "Gnu.h"
#include "Arch/ARM.h"
#include "Arch/Mips.h"
#include "Arch/PPC.h"
#include "Arch/RISCV.h"
#include "Arch/Sparc.h"
#include "Arch/SystemZ.h"
#include "CommonArgs.h"
#include "Linux.h"
#include "clang/Config/config.h" // for GCC_INSTALL_PREFIX
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/TargetParser.h"
#include "llvm/Support/VirtualFileSystem.h"
#include <system_error>
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang;
using namespace llvm::opt;
using tools::addMultilibFlag;
using tools::addPathIfExists;
void tools::GnuTool::anchor() {}
static bool forwardToGCC(const Option &O) {
// Don't forward inputs from the original command line. They are added from
// InputInfoList.
return O.getKind() != Option::InputClass &&
!O.hasFlag(options::DriverOption) && !O.hasFlag(options::LinkerInput);
}
// Switch CPU names not recognized by GNU assembler to a close CPU that it does
// recognize, instead of a lower march from being picked in the absence of a cpu
// flag.
static void normalizeCPUNamesForAssembler(const ArgList &Args,
ArgStringList &CmdArgs) {
if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
StringRef CPUArg(A->getValue());
if (CPUArg.equals_lower("krait"))
CmdArgs.push_back("-mcpu=cortex-a15");
else if(CPUArg.equals_lower("kryo"))
CmdArgs.push_back("-mcpu=cortex-a57");
else
Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
}
}
void tools::gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
const Driver &D = getToolChain().getDriver();
ArgStringList CmdArgs;
for (const auto &A : Args) {
if (forwardToGCC(A->getOption())) {
// It is unfortunate that we have to claim here, as this means
// we will basically never report anything interesting for
// platforms using a generic gcc, even if we are just using gcc
// to get to the assembler.
A->claim();
// Don't forward any -g arguments to assembly steps.
if (isa<AssembleJobAction>(JA) &&
A->getOption().matches(options::OPT_g_Group))
continue;
// Don't forward any -W arguments to assembly and link steps.
if ((isa<AssembleJobAction>(JA) || isa<LinkJobAction>(JA)) &&
A->getOption().matches(options::OPT_W_Group))
continue;
// Don't forward -mno-unaligned-access since GCC doesn't understand
// it and because it doesn't affect the assembly or link steps.
if ((isa<AssembleJobAction>(JA) || isa<LinkJobAction>(JA)) &&
(A->getOption().matches(options::OPT_munaligned_access) ||
A->getOption().matches(options::OPT_mno_unaligned_access)))
continue;
A->render(Args, CmdArgs);
}
}
RenderExtraToolArgs(JA, CmdArgs);
// If using a driver driver, force the arch.
if (getToolChain().getTriple().isOSDarwin()) {
CmdArgs.push_back("-arch");
CmdArgs.push_back(
Args.MakeArgString(getToolChain().getDefaultUniversalArchName()));
}
// Try to force gcc to match the tool chain we want, if we recognize
// the arch.
//
// FIXME: The triple class should directly provide the information we want
// here.
switch (getToolChain().getArch()) {
default:
break;
case llvm::Triple::x86:
case llvm::Triple::ppc:
CmdArgs.push_back("-m32");
break;
case llvm::Triple::x86_64:
case llvm::Triple::ppc64:
case llvm::Triple::ppc64le:
CmdArgs.push_back("-m64");
break;
case llvm::Triple::sparcel:
CmdArgs.push_back("-EL");
break;
}
if (Output.isFilename()) {
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
} else {
assert(Output.isNothing() && "Unexpected output");
CmdArgs.push_back("-fsyntax-only");
}
Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
// Only pass -x if gcc will understand it; otherwise hope gcc
// understands the suffix correctly. The main use case this would go
// wrong in is for linker inputs if they happened to have an odd
// suffix; really the only way to get this to happen is a command
// like '-x foobar a.c' which will treat a.c like a linker input.
//
// FIXME: For the linker case specifically, can we safely convert
// inputs into '-Wl,' options?
for (const auto &II : Inputs) {
// Don't try to pass LLVM or AST inputs to a generic gcc.
if (types::isLLVMIR(II.getType()))
D.Diag(clang::diag::err_drv_no_linker_llvm_support)
<< getToolChain().getTripleString();
else if (II.getType() == types::TY_AST)
D.Diag(diag::err_drv_no_ast_support) << getToolChain().getTripleString();
else if (II.getType() == types::TY_ModuleFile)
D.Diag(diag::err_drv_no_module_support)
<< getToolChain().getTripleString();
if (types::canTypeBeUserSpecified(II.getType())) {
CmdArgs.push_back("-x");
CmdArgs.push_back(types::getTypeName(II.getType()));
}
if (II.isFilename())
CmdArgs.push_back(II.getFilename());
else {
const Arg &A = II.getInputArg();
// Reverse translate some rewritten options.
if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx)) {
CmdArgs.push_back("-lstdc++");
continue;
}
// Don't render as input, we need gcc to do the translations.
A.render(Args, CmdArgs);
}
}
const std::string &customGCCName = D.getCCCGenericGCCName();
const char *GCCName;
if (!customGCCName.empty())
GCCName = customGCCName.c_str();
else if (D.CCCIsCXX()) {
GCCName = "g++";
} else
GCCName = "gcc";
const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath(GCCName));
C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
}
void tools::gcc::Preprocessor::RenderExtraToolArgs(
const JobAction &JA, ArgStringList &CmdArgs) const {
CmdArgs.push_back("-E");
}
void tools::gcc::Compiler::RenderExtraToolArgs(const JobAction &JA,
ArgStringList &CmdArgs) const {
const Driver &D = getToolChain().getDriver();
switch (JA.getType()) {
// If -flto, etc. are present then make sure not to force assembly output.
case types::TY_LLVM_IR:
case types::TY_LTO_IR:
case types::TY_LLVM_BC:
case types::TY_LTO_BC:
CmdArgs.push_back("-c");
break;
// We assume we've got an "integrated" assembler in that gcc will produce an
// object file itself.
case types::TY_Object:
CmdArgs.push_back("-c");
break;
case types::TY_PP_Asm:
CmdArgs.push_back("-S");
break;
case types::TY_Nothing:
CmdArgs.push_back("-fsyntax-only");
break;
default:
D.Diag(diag::err_drv_invalid_gcc_output_type) << getTypeName(JA.getType());
}
}
void tools::gcc::Linker::RenderExtraToolArgs(const JobAction &JA,
ArgStringList &CmdArgs) const {
// The types are (hopefully) good enough.
}
// On Arm the endianness of the output file is determined by the target and
// can be overridden by the pseudo-target flags '-mlittle-endian'/'-EL' and
// '-mbig-endian'/'-EB'. Unlike other targets the flag does not result in a
// normalized triple so we must handle the flag here.
static bool isArmBigEndian(const llvm::Triple &Triple,
const ArgList &Args) {
bool IsBigEndian = false;
switch (Triple.getArch()) {
case llvm::Triple::armeb:
case llvm::Triple::thumbeb:
IsBigEndian = true;
LLVM_FALLTHROUGH;
case llvm::Triple::arm:
case llvm::Triple::thumb:
if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
options::OPT_mbig_endian))
IsBigEndian = !A->getOption().matches(options::OPT_mlittle_endian);
break;
default:
break;
}
return IsBigEndian;
}
static const char *getLDMOption(const llvm::Triple &T, const ArgList &Args) {
switch (T.getArch()) {
case llvm::Triple::x86:
if (T.isOSIAMCU())
return "elf_iamcu";
return "elf_i386";
case llvm::Triple::aarch64:
return "aarch64linux";
case llvm::Triple::aarch64_be:
return "aarch64linuxb";
case llvm::Triple::arm:
case llvm::Triple::thumb:
case llvm::Triple::armeb:
case llvm::Triple::thumbeb:
return isArmBigEndian(T, Args) ? "armelfb_linux_eabi" : "armelf_linux_eabi";
case llvm::Triple::ppc:
return "elf32ppclinux";
case llvm::Triple::ppc64:
return "elf64ppc";
case llvm::Triple::ppc64le:
return "elf64lppc";
case llvm::Triple::riscv32:
return "elf32lriscv";
case llvm::Triple::riscv64:
return "elf64lriscv";
case llvm::Triple::sparc:
case llvm::Triple::sparcel:
return "elf32_sparc";
case llvm::Triple::sparcv9:
return "elf64_sparc";
case llvm::Triple::mips:
return "elf32btsmip";
case llvm::Triple::mipsel:
return "elf32ltsmip";
case llvm::Triple::mips64:
if (tools::mips::hasMipsAbiArg(Args, "n32") ||
T.getEnvironment() == llvm::Triple::GNUABIN32)
return "elf32btsmipn32";
return "elf64btsmip";
case llvm::Triple::mips64el:
if (tools::mips::hasMipsAbiArg(Args, "n32") ||
T.getEnvironment() == llvm::Triple::GNUABIN32)
return "elf32ltsmipn32";
return "elf64ltsmip";
case llvm::Triple::systemz:
return "elf64_s390";
case llvm::Triple::x86_64:
if (T.getEnvironment() == llvm::Triple::GNUX32)
return "elf32_x86_64";
return "elf_x86_64";
default:
return nullptr;
}
}
static bool getPIE(const ArgList &Args, const ToolChain &TC) {
if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_static) ||
Args.hasArg(options::OPT_r) || Args.hasArg(options::OPT_static_pie))
return false;
Arg *A = Args.getLastArg(options::OPT_pie, options::OPT_no_pie,
options::OPT_nopie);
if (!A)
return TC.isPIEDefault();
return A->getOption().matches(options::OPT_pie);
}
static bool getStaticPIE(const ArgList &Args, const ToolChain &TC) {
bool HasStaticPIE = Args.hasArg(options::OPT_static_pie);
// -no-pie is an alias for -nopie. So, handling -nopie takes care of
// -no-pie as well.
if (HasStaticPIE && Args.hasArg(options::OPT_nopie)) {
const Driver &D = TC.getDriver();
const llvm::opt::OptTable &Opts = D.getOpts();
const char *StaticPIEName = Opts.getOptionName(options::OPT_static_pie);
const char *NoPIEName = Opts.getOptionName(options::OPT_nopie);
D.Diag(diag::err_drv_cannot_mix_options) << StaticPIEName << NoPIEName;
}
return HasStaticPIE;
}
static bool getStatic(const ArgList &Args) {
return Args.hasArg(options::OPT_static) &&
!Args.hasArg(options::OPT_static_pie);
}
void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
// FIXME: The Linker class constructor takes a ToolChain and not a
// Generic_ELF, so the static_cast might return a reference to a invalid
// instance (see PR45061). Ideally, the Linker constructor needs to take a
// Generic_ELF instead.
const toolchains::Generic_ELF &ToolChain =
static_cast<const toolchains::Generic_ELF &>(getToolChain());
const Driver &D = ToolChain.getDriver();
const llvm::Triple &Triple = getToolChain().getEffectiveTriple();
const llvm::Triple::ArchType Arch = ToolChain.getArch();
const bool isAndroid = ToolChain.getTriple().isAndroid();
const bool IsIAMCU = ToolChain.getTriple().isOSIAMCU();
const bool IsPIE = getPIE(Args, ToolChain);
const bool IsStaticPIE = getStaticPIE(Args, ToolChain);
const bool IsStatic = getStatic(Args);
const bool HasCRTBeginEndFiles =
ToolChain.getTriple().hasEnvironment() ||
(ToolChain.getTriple().getVendor() != llvm::Triple::MipsTechnologies);
ArgStringList CmdArgs;
// Silence warning for "clang -g foo.o -o foo"
Args.ClaimAllArgs(options::OPT_g_Group);
// and "clang -emit-llvm foo.o -o foo"
Args.ClaimAllArgs(options::OPT_emit_llvm);
// and for "clang -w foo.o -o foo". Other warning options are already
// handled somewhere else.
Args.ClaimAllArgs(options::OPT_w);
if (!D.SysRoot.empty())
CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
if (IsPIE)
CmdArgs.push_back("-pie");
if (IsStaticPIE) {
CmdArgs.push_back("-static");
CmdArgs.push_back("-pie");
CmdArgs.push_back("--no-dynamic-linker");
CmdArgs.push_back("-z");
CmdArgs.push_back("text");
}
if (ToolChain.isNoExecStackDefault()) {
CmdArgs.push_back("-z");
CmdArgs.push_back("noexecstack");
}
if (Args.hasArg(options::OPT_rdynamic))
CmdArgs.push_back("-export-dynamic");
if (Args.hasArg(options::OPT_s))
CmdArgs.push_back("-s");
if (Triple.isARM() || Triple.isThumb() || Triple.isAArch64()) {
bool IsBigEndian = isArmBigEndian(Triple, Args);
if (IsBigEndian)
arm::appendBE8LinkFlag(Args, CmdArgs, Triple);
IsBigEndian = IsBigEndian || Arch == llvm::Triple::aarch64_be;
CmdArgs.push_back(IsBigEndian ? "-EB" : "-EL");
}
// Most Android ARM64 targets should enable the linker fix for erratum
// 843419. Only non-Cortex-A53 devices are allowed to skip this flag.
if (Arch == llvm::Triple::aarch64 && isAndroid) {
std::string CPU = getCPUName(Args, Triple);
if (CPU.empty() || CPU == "generic" || CPU == "cortex-a53")
CmdArgs.push_back("--fix-cortex-a53-843419");
}
// Android does not allow shared text relocations. Emit a warning if the
// user's code contains any.
if (isAndroid)
CmdArgs.push_back("--warn-shared-textrel");
ToolChain.addExtraOpts(CmdArgs);
CmdArgs.push_back("--eh-frame-hdr");
if (const char *LDMOption = getLDMOption(ToolChain.getTriple(), Args)) {
CmdArgs.push_back("-m");
CmdArgs.push_back(LDMOption);
} else {
D.Diag(diag::err_target_unknown_triple) << Triple.str();
return;
}
if (IsStatic) {
if (Arch == llvm::Triple::arm || Arch == llvm::Triple::armeb ||
Arch == llvm::Triple::thumb || Arch == llvm::Triple::thumbeb)
CmdArgs.push_back("-Bstatic");
else
CmdArgs.push_back("-static");
} else if (Args.hasArg(options::OPT_shared)) {
CmdArgs.push_back("-shared");
}
if (!IsStatic) {
if (Args.hasArg(options::OPT_rdynamic))
CmdArgs.push_back("-export-dynamic");
if (!Args.hasArg(options::OPT_shared) && !IsStaticPIE) {
const std::string Loader =
D.DyldPrefix + ToolChain.getDynamicLinker(Args);
CmdArgs.push_back("-dynamic-linker");
CmdArgs.push_back(Args.MakeArgString(Loader));
}
}
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
if (!isAndroid && !IsIAMCU) {
const char *crt1 = nullptr;
if (!Args.hasArg(options::OPT_shared)) {
if (Args.hasArg(options::OPT_pg))
crt1 = "gcrt1.o";
else if (IsPIE)
crt1 = "Scrt1.o";
else if (IsStaticPIE)
crt1 = "rcrt1.o";
else
crt1 = "crt1.o";
}
if (crt1)
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt1)));
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
}
if (IsIAMCU)
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
else if (HasCRTBeginEndFiles) {
std::string P;
if (ToolChain.GetRuntimeLibType(Args) == ToolChain::RLT_CompilerRT &&
!isAndroid) {
std::string crtbegin = ToolChain.getCompilerRT(Args, "crtbegin",
ToolChain::FT_Object);
if (ToolChain.getVFS().exists(crtbegin))
P = crtbegin;
}
if (P.empty()) {
const char *crtbegin;
if (IsStatic)
crtbegin = isAndroid ? "crtbegin_static.o" : "crtbeginT.o";
else if (Args.hasArg(options::OPT_shared))
crtbegin = isAndroid ? "crtbegin_so.o" : "crtbeginS.o";
else if (IsPIE || IsStaticPIE)
crtbegin = isAndroid ? "crtbegin_dynamic.o" : "crtbeginS.o";
else
crtbegin = isAndroid ? "crtbegin_dynamic.o" : "crtbegin.o";
P = ToolChain.GetFilePath(crtbegin);
}
CmdArgs.push_back(Args.MakeArgString(P));
}
// Add crtfastmath.o if available and fast math is enabled.
ToolChain.addFastMathRuntimeIfAvailable(Args, CmdArgs);
}
Args.AddAllArgs(CmdArgs, options::OPT_L);
Args.AddAllArgs(CmdArgs, options::OPT_u);
ToolChain.AddFilePathLibArgs(Args, CmdArgs);
if (D.isUsingLTO()) {
assert(!Inputs.empty() && "Must have at least one input.");
addLTOOptions(ToolChain, Args, CmdArgs, Output, Inputs[0],
D.getLTOMode() == LTOK_Thin);
}
if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle))
CmdArgs.push_back("--no-demangle");
bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
// The profile runtime also needs access to system libraries.
getToolChain().addProfileRTLibs(Args, CmdArgs);
if (D.CCCIsCXX() &&
!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
if (ToolChain.ShouldLinkCXXStdlib(Args)) {
bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
!Args.hasArg(options::OPT_static);
if (OnlyLibstdcxxStatic)
CmdArgs.push_back("-Bstatic");
ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
if (OnlyLibstdcxxStatic)
CmdArgs.push_back("-Bdynamic");
}
CmdArgs.push_back("-lm");
}
// Silence warnings when linking C code with a C++ '-stdlib' argument.
Args.ClaimAllArgs(options::OPT_stdlib_EQ);
if (!Args.hasArg(options::OPT_nostdlib)) {
if (!Args.hasArg(options::OPT_nodefaultlibs)) {
if (IsStatic || IsStaticPIE)
CmdArgs.push_back("--start-group");
if (NeedsSanitizerDeps)
linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
if (NeedsXRayDeps)
linkXRayRuntimeDeps(ToolChain, CmdArgs);
bool WantPthread = Args.hasArg(options::OPT_pthread) ||
Args.hasArg(options::OPT_pthreads);
// Use the static OpenMP runtime with -static-openmp
bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
!Args.hasArg(options::OPT_static);
// FIXME: Only pass GompNeedsRT = true for platforms with libgomp that
// require librt. Most modern Linux platforms do, but some may not.
if (addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP,
JA.isHostOffloading(Action::OFK_OpenMP),
/* GompNeedsRT= */ true))
// OpenMP runtimes implies pthreads when using the GNU toolchain.
// FIXME: Does this really make sense for all GNU toolchains?
WantPthread = true;
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
if (WantPthread && !isAndroid)
CmdArgs.push_back("-lpthread");
if (Args.hasArg(options::OPT_fsplit_stack))
CmdArgs.push_back("--wrap=pthread_create");
if (!Args.hasArg(options::OPT_nolibc))
CmdArgs.push_back("-lc");
// Add IAMCU specific libs, if needed.
if (IsIAMCU)
CmdArgs.push_back("-lgloss");
if (IsStatic || IsStaticPIE)
CmdArgs.push_back("--end-group");
else
AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
// Add IAMCU specific libs (outside the group), if needed.
if (IsIAMCU) {
CmdArgs.push_back("--as-needed");
CmdArgs.push_back("-lsoftfp");
CmdArgs.push_back("--no-as-needed");
}
}
if (!Args.hasArg(options::OPT_nostartfiles) && !IsIAMCU) {
if (HasCRTBeginEndFiles) {
std::string P;
if (ToolChain.GetRuntimeLibType(Args) == ToolChain::RLT_CompilerRT &&
!isAndroid) {
std::string crtend = ToolChain.getCompilerRT(Args, "crtend",
ToolChain::FT_Object);
if (ToolChain.getVFS().exists(crtend))
P = crtend;
}
if (P.empty()) {
const char *crtend;
if (Args.hasArg(options::OPT_shared))
crtend = isAndroid ? "crtend_so.o" : "crtendS.o";
else if (IsPIE || IsStaticPIE)
crtend = isAndroid ? "crtend_android.o" : "crtendS.o";
else
crtend = isAndroid ? "crtend_android.o" : "crtend.o";
P = ToolChain.GetFilePath(crtend);
}
CmdArgs.push_back(Args.MakeArgString(P));
}
if (!isAndroid)
CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
}
}
// Add HIP offloading linker script args if required.
AddHIPLinkerScript(getToolChain(), C, Output, Inputs, Args, CmdArgs, JA,
*this);
const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
}
void tools::gnutools::Assembler::ConstructJob(Compilation &C,
const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
const ArgList &Args,
const char *LinkingOutput) const {
const auto &D = getToolChain().getDriver();
claimNoWarnArgs(Args);
ArgStringList CmdArgs;
llvm::Reloc::Model RelocationModel;
unsigned PICLevel;
bool IsPIE;
std::tie(RelocationModel, PICLevel, IsPIE) =
ParsePICArgs(getToolChain(), Args);
if (const Arg *A = Args.getLastArg(options::OPT_gz, options::OPT_gz_EQ)) {
if (A->getOption().getID() == options::OPT_gz) {
CmdArgs.push_back("--compress-debug-sections");
} else {
StringRef Value = A->getValue();
if (Value == "none" || Value == "zlib" || Value == "zlib-gnu") {
CmdArgs.push_back(
Args.MakeArgString("--compress-debug-sections=" + Twine(Value)));
} else {
D.Diag(diag::err_drv_unsupported_option_argument)
<< A->getOption().getName() << Value;
}
}
}
if (getToolChain().isNoExecStackDefault()) {
CmdArgs.push_back("--noexecstack");
}
switch (getToolChain().getArch()) {
default:
break;
// Add --32/--64 to make sure we get the format we want.
// This is incomplete
case llvm::Triple::x86:
CmdArgs.push_back("--32");
break;
case llvm::Triple::x86_64:
if (getToolChain().getTriple().getEnvironment() == llvm::Triple::GNUX32)
CmdArgs.push_back("--x32");
else
CmdArgs.push_back("--64");
break;
case llvm::Triple::ppc: {
CmdArgs.push_back("-a32");
CmdArgs.push_back("-mppc");
CmdArgs.push_back(
ppc::getPPCAsmModeForCPU(getCPUName(Args, getToolChain().getTriple())));
break;
}
case llvm::Triple::ppc64: {
CmdArgs.push_back("-a64");
CmdArgs.push_back("-mppc64");
CmdArgs.push_back(
ppc::getPPCAsmModeForCPU(getCPUName(Args, getToolChain().getTriple())));
break;
}
case llvm::Triple::ppc64le: {
CmdArgs.push_back("-a64");
CmdArgs.push_back("-mppc64");
CmdArgs.push_back("-mlittle-endian");
CmdArgs.push_back(
ppc::getPPCAsmModeForCPU(getCPUName(Args, getToolChain().getTriple())));
break;
}
case llvm::Triple::riscv32:
case llvm::Triple::riscv64: {
StringRef ABIName = riscv::getRISCVABI(Args, getToolChain().getTriple());
CmdArgs.push_back("-mabi");
CmdArgs.push_back(ABIName.data());
StringRef MArchName = riscv::getRISCVArch(Args, getToolChain().getTriple());
CmdArgs.push_back("-march");
CmdArgs.push_back(MArchName.data());
break;
}
case llvm::Triple::sparc:
case llvm::Triple::sparcel: {
CmdArgs.push_back("-32");
std::string CPU = getCPUName(Args, getToolChain().getTriple());
CmdArgs.push_back(
sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
break;
}
case llvm::Triple::sparcv9: {
CmdArgs.push_back("-64");
std::string CPU = getCPUName(Args, getToolChain().getTriple());
CmdArgs.push_back(
sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
break;
}
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
const llvm::Triple &Triple2 = getToolChain().getTriple();
CmdArgs.push_back(isArmBigEndian(Triple2, Args) ? "-EB" : "-EL");
switch (Triple2.getSubArch()) {
case llvm::Triple::ARMSubArch_v7:
CmdArgs.push_back("-mfpu=neon");
break;
case llvm::Triple::ARMSubArch_v8:
CmdArgs.push_back("-mfpu=crypto-neon-fp-armv8");
break;
default:
break;
}
switch (arm::getARMFloatABI(getToolChain(), Args)) {
case arm::FloatABI::Invalid: llvm_unreachable("must have an ABI!");
case arm::FloatABI::Soft:
CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=soft"));
break;
case arm::FloatABI::SoftFP:
CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=softfp"));
break;
case arm::FloatABI::Hard:
CmdArgs.push_back(Args.MakeArgString("-mfloat-abi=hard"));
break;
}
Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
normalizeCPUNamesForAssembler(Args, CmdArgs);
Args.AddLastArg(CmdArgs, options::OPT_mfpu_EQ);
break;
}
case llvm::Triple::aarch64:
case llvm::Triple::aarch64_be: {
CmdArgs.push_back(
getToolChain().getArch() == llvm::Triple::aarch64_be ? "-EB" : "-EL");
Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
normalizeCPUNamesForAssembler(Args, CmdArgs);
break;
}
case llvm::Triple::mips:
case llvm::Triple::mipsel:
case llvm::Triple::mips64:
case llvm::Triple::mips64el: {
StringRef CPUName;
StringRef ABIName;
mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);
ABIName = mips::getGnuCompatibleMipsABIName(ABIName);
CmdArgs.push_back("-march");
CmdArgs.push_back(CPUName.data());
CmdArgs.push_back("-mabi");
CmdArgs.push_back(ABIName.data());
// -mno-shared should be emitted unless -fpic, -fpie, -fPIC, -fPIE,
// or -mshared (not implemented) is in effect.
if (RelocationModel == llvm::Reloc::Static)
CmdArgs.push_back("-mno-shared");
// LLVM doesn't support -mplt yet and acts as if it is always given.
// However, -mplt has no effect with the N64 ABI.
if (ABIName != "64" && !Args.hasArg(options::OPT_mno_abicalls))
CmdArgs.push_back("-call_nonpic");
if (getToolChain().getTriple().isLittleEndian())
CmdArgs.push_back("-EL");
else
CmdArgs.push_back("-EB");
if (Arg *A = Args.getLastArg(options::OPT_mnan_EQ)) {
if (StringRef(A->getValue()) == "2008")
CmdArgs.push_back(Args.MakeArgString("-mnan=2008"));
}
// Add the last -mfp32/-mfpxx/-mfp64 or -mfpxx if it is enabled by default.
if (Arg *A = Args.getLastArg(options::OPT_mfp32, options::OPT_mfpxx,
options::OPT_mfp64)) {
A->claim();
A->render(Args, CmdArgs);
} else if (mips::shouldUseFPXX(
Args, getToolChain().getTriple(), CPUName, ABIName,
mips::getMipsFloatABI(getToolChain().getDriver(), Args,
getToolChain().getTriple())))
CmdArgs.push_back("-mfpxx");
// Pass on -mmips16 or -mno-mips16. However, the assembler equivalent of
// -mno-mips16 is actually -no-mips16.
if (Arg *A =
Args.getLastArg(options::OPT_mips16, options::OPT_mno_mips16)) {
if (A->getOption().matches(options::OPT_mips16)) {
A->claim();
A->render(Args, CmdArgs);
} else {
A->claim();
CmdArgs.push_back("-no-mips16");
}
}
Args.AddLastArg(CmdArgs, options::OPT_mmicromips,
options::OPT_mno_micromips);
Args.AddLastArg(CmdArgs, options::OPT_mdsp, options::OPT_mno_dsp);
Args.AddLastArg(CmdArgs, options::OPT_mdspr2, options::OPT_mno_dspr2);
if (Arg *A = Args.getLastArg(options::OPT_mmsa, options::OPT_mno_msa)) {
// Do not use AddLastArg because not all versions of MIPS assembler
// support -mmsa / -mno-msa options.
if (A->getOption().matches(options::OPT_mmsa))
CmdArgs.push_back(Args.MakeArgString("-mmsa"));
}
Args.AddLastArg(CmdArgs, options::OPT_mhard_float,
options::OPT_msoft_float);
Args.AddLastArg(CmdArgs, options::OPT_mdouble_float,
options::OPT_msingle_float);
Args.AddLastArg(CmdArgs, options::OPT_modd_spreg,
options::OPT_mno_odd_spreg);
AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
break;
}
case llvm::Triple::systemz: {
// Always pass an -march option, since our default of z10 is later
// than the GNU assembler's default.
std::string CPUName = systemz::getSystemZTargetCPU(Args);
CmdArgs.push_back(Args.MakeArgString("-march=" + CPUName));
break;
}
}
for (const Arg *A : Args.filtered(options::OPT_ffile_prefix_map_EQ,
options::OPT_fdebug_prefix_map_EQ)) {
StringRef Map = A->getValue();
if (Map.find('=') == StringRef::npos)
D.Diag(diag::err_drv_invalid_argument_to_option)
<< Map << A->getOption().getName();
else {
CmdArgs.push_back(Args.MakeArgString("--debug-prefix-map"));
CmdArgs.push_back(Args.MakeArgString(Map));
}
A->claim();
}
Args.AddAllArgs(CmdArgs, options::OPT_I);
Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
for (const auto &II : Inputs)
CmdArgs.push_back(II.getFilename());
const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
// Handle the debug info splitting at object creation time if we're
// creating an object.
// TODO: Currently only works on linux with newer objcopy.
if (Args.hasArg(options::OPT_gsplit_dwarf) &&
getToolChain().getTriple().isOSLinux())
SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output,
SplitDebugName(Args, Inputs[0], Output));
}
namespace {
// Filter to remove Multilibs that don't exist as a suffix to Path
class FilterNonExistent {
StringRef Base, File;
llvm::vfs::FileSystem &VFS;
public:
FilterNonExistent(StringRef Base, StringRef File, llvm::vfs::FileSystem &VFS)
: Base(Base), File(File), VFS(VFS) {}
bool operator()(const Multilib &M) {
return !VFS.exists(Base + M.gccSuffix() + File);
}
};
} // end anonymous namespace
static bool isSoftFloatABI(const ArgList &Args) {
Arg *A = Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float,
options::OPT_mfloat_abi_EQ);
if (!A)
return false;
return A->getOption().matches(options::OPT_msoft_float) ||
(A->getOption().matches(options::OPT_mfloat_abi_EQ) &&
A->getValue() == StringRef("soft"));
}
static bool isArmOrThumbArch(llvm::Triple::ArchType Arch) {
return Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb;
}
static bool isMipsEL(llvm::Triple::ArchType Arch) {
return Arch == llvm::Triple::mipsel || Arch == llvm::Triple::mips64el;
}
static bool isMips16(const ArgList &Args) {
Arg *A = Args.getLastArg(options::OPT_mips16, options::OPT_mno_mips16);
return A && A->getOption().matches(options::OPT_mips16);
}
static bool isMicroMips(const ArgList &Args) {
Arg *A = Args.getLastArg(options::OPT_mmicromips, options::OPT_mno_micromips);
return A && A->getOption().matches(options::OPT_mmicromips);
}
static bool isMSP430(llvm::Triple::ArchType Arch) {
return Arch == llvm::Triple::msp430;
}
static Multilib makeMultilib(StringRef commonSuffix) {
return Multilib(commonSuffix, commonSuffix, commonSuffix);
}
static bool findMipsCsMultilibs(const Multilib::flags_list &Flags,
FilterNonExistent &NonExistent,
DetectedMultilibs &Result) {
// Check for Code Sourcery toolchain multilibs
MultilibSet CSMipsMultilibs;
{
auto MArchMips16 = makeMultilib("/mips16").flag("+m32").flag("+mips16");
auto MArchMicroMips =
makeMultilib("/micromips").flag("+m32").flag("+mmicromips");
auto MArchDefault = makeMultilib("").flag("-mips16").flag("-mmicromips");
auto UCLibc = makeMultilib("/uclibc").flag("+muclibc");
auto SoftFloat = makeMultilib("/soft-float").flag("+msoft-float");
auto Nan2008 = makeMultilib("/nan2008").flag("+mnan=2008");
auto DefaultFloat =
makeMultilib("").flag("-msoft-float").flag("-mnan=2008");
auto BigEndian = makeMultilib("").flag("+EB").flag("-EL");
auto LittleEndian = makeMultilib("/el").flag("+EL").flag("-EB");
// Note that this one's osSuffix is ""
auto MAbi64 = makeMultilib("")
.gccSuffix("/64")
.includeSuffix("/64")
.flag("+mabi=n64")
.flag("-mabi=n32")
.flag("-m32");
CSMipsMultilibs =
MultilibSet()
.Either(MArchMips16, MArchMicroMips, MArchDefault)
.Maybe(UCLibc)
.Either(SoftFloat, Nan2008, DefaultFloat)
.FilterOut("/micromips/nan2008")
.FilterOut("/mips16/nan2008")