1 //===- llvm-mcld.cpp ------------------------------------------------------===//
2 //
3 // The MCLinker Project
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 #include <mcld/Module.h>
10 #include <mcld/LinkerConfig.h>
11 #include <mcld/LinkerScript.h>
12 #include <mcld/Target/TargetMachine.h>
13 #include <mcld/Support/TargetSelect.h>
14 #include <mcld/Support/TargetRegistry.h>
15 #include <mcld/Support/CommandLine.h>
16 #include <mcld/Support/Path.h>
17 #include <mcld/Support/RealPath.h>
18 #include <mcld/Support/MsgHandling.h>
19 #include <mcld/Support/FileHandle.h>
20 #include <mcld/Support/FileSystem.h>
21 #include <mcld/Support/raw_ostream.h>
22 #include <mcld/Support/SystemUtils.h>
23 #include <mcld/Support/ToolOutputFile.h>
24 #include <mcld/LD/DiagnosticLineInfo.h>
25 #include <mcld/LD/TextDiagnosticPrinter.h>
26
27 #include <llvm/PassManager.h>
28 #include <llvm/Pass.h>
29 #include <llvm/IR/Module.h>
30 #include <llvm/IR/DataLayout.h>
31 #include <llvm/IR/LLVMContext.h>
32 #include <llvm/ADT/Triple.h>
33 #include <llvm/ADT/StringSwitch.h>
34 #include <llvm/MC/SubtargetFeature.h>
35 #include <llvm/Support/CommandLine.h>
36 #include <llvm/Support/Debug.h>
37 #include <llvm/Support/FormattedStream.h>
38 #include <llvm/Support/Host.h>
39 #include <llvm/Support/IRReader.h>
40 #include <llvm/Support/ManagedStatic.h>
41 #include <llvm/Support/Signals.h>
42 #include <llvm/Support/TargetRegistry.h>
43 #include <llvm/Support/TargetSelect.h>
44 #include <llvm/Support/Process.h>
45 #include <llvm/Target/TargetMachine.h>
46
47 #if defined(HAVE_UNISTD_H)
48 # include <unistd.h>
49 #endif
50
51 #if defined(_MSC_VER) || defined(__MINGW32__)
52 #include <io.h>
53 #ifndef STDIN_FILENO
54 # define STDIN_FILENO 0
55 #endif
56 #ifndef STDOUT_FILENO
57 # define STDOUT_FILENO 1
58 #endif
59 #ifndef STDERR_FILENO
60 # define STDERR_FILENO 2
61 #endif
62 #endif
63
64 using namespace llvm;
65
66 #ifdef ENABLE_UNITTEST
67 #include <gtest.h>
68
69 static cl::opt<bool>
70 UnitTest("unittest", cl::desc("do unit test") );
71
unit_test(int argc,char * argv[])72 int unit_test( int argc, char* argv[] )
73 {
74 testing::InitGoogleTest( &argc, argv );
75 return RUN_ALL_TESTS();
76 }
77
78 #endif
79
80 // General options for llc. Other pass-specific options are specified
81 // within the corresponding llc passes, and target-specific options
82 // and back-end code generation options are specified with the target machine.
83 //
84 // Determine optimization level.
85 static cl::opt<char>
86 OptLevel("O",
87 cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
88 "(default = '-O2')"),
89 cl::Prefix,
90 cl::ZeroOrMore,
91 cl::init(' '));
92
93 static cl::opt<std::string>
94 TargetTriple("mtriple", cl::desc("Override target triple for module"));
95
96 static cl::opt<std::string>
97 MArch("march", cl::desc("Architecture to generate code for (see --version)"));
98
99 static cl::opt<std::string>
100 MCPU("mcpu",
101 cl::desc("Target a specific cpu type (-mcpu=help for details)"),
102 cl::value_desc("cpu-name"),
103 cl::init(""));
104
105 static cl::list<std::string>
106 MAttrs("mattr",
107 cl::CommaSeparated,
108 cl::desc("Target specific attributes (-mattr=help for details)"),
109 cl::value_desc("a1,+a2,-a3,..."));
110
111 static cl::opt<llvm::CodeModel::Model>
112 CMModel("code-model",
113 cl::desc("Choose code model"),
114 cl::init(CodeModel::Default),
115 cl::values(clEnumValN(CodeModel::Default, "default",
116 "Target default code model"),
117 clEnumValN(CodeModel::Small, "small",
118 "Small code model"),
119 clEnumValN(CodeModel::Kernel, "kernel",
120 "Kernel code model"),
121 clEnumValN(CodeModel::Medium, "medium",
122 "Medium code model"),
123 clEnumValN(CodeModel::Large, "large",
124 "Large code model"),
125 clEnumValEnd));
126
127 cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
128 cl::desc("Do not verify input module"));
129
130 static cl::opt<bool>
131 EnableFPMAD("enable-fp-mad",
132 cl::desc("Enable less precise MAD instructions to be generated"),
133 cl::init(false));
134
135 static cl::opt<bool>
136 DisableFPElim("disable-fp-elim",
137 cl::desc("Disable frame pointer elimination optimization"),
138 cl::init(false));
139
140 static cl::opt<bool>
141 DisableFPElimNonLeaf("disable-non-leaf-fp-elim",
142 cl::desc("Disable frame pointer elimination optimization for non-leaf funcs"),
143 cl::init(false));
144
145 static cl::opt<llvm::FPOpFusion::FPOpFusionMode>
146 FuseFPOps("fuse-fp-ops",
147 cl::desc("Enable aggresive formation of fused FP ops"),
148 cl::init(FPOpFusion::Standard),
149 cl::values(
150 clEnumValN(FPOpFusion::Fast, "fast",
151 "Fuse FP ops whenever profitable"),
152 clEnumValN(FPOpFusion::Standard, "standard",
153 "Only fuse 'blessed' FP ops."),
154 clEnumValN(FPOpFusion::Strict, "strict",
155 "Only fuse FP ops when the result won't be effected."),
156 clEnumValEnd));
157
158 static cl::opt<bool>
159 EnableUnsafeFPMath("enable-unsafe-fp-math",
160 cl::desc("Enable optimizations that may decrease FP precision"),
161 cl::init(false));
162
163 static cl::opt<bool>
164 EnableNoInfsFPMath("enable-no-infs-fp-math",
165 cl::desc("Enable FP math optimizations that assume no +-Infs"),
166 cl::init(false));
167
168 static cl::opt<bool>
169 EnableNoNaNsFPMath("enable-no-nans-fp-math",
170 cl::desc("Enable FP math optimizations that assume no NaNs"),
171 cl::init(false));
172
173 static cl::opt<bool>
174 EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
175 cl::Hidden,
176 cl::desc("Force codegen to assume rounding mode can change dynamically"),
177 cl::init(false));
178
179 static cl::opt<bool>
180 GenerateSoftFloatCalls("soft-float",
181 cl::desc("Generate software floating point library calls"),
182 cl::init(false));
183
184 static cl::opt<llvm::FloatABI::ABIType>
185 FloatABIForCalls("float-abi",
186 cl::desc("Choose float ABI type"),
187 cl::init(FloatABI::Default),
188 cl::values(
189 clEnumValN(FloatABI::Default, "default",
190 "Target default float ABI type"),
191 clEnumValN(FloatABI::Soft, "soft",
192 "Soft float ABI (implied by -soft-float)"),
193 clEnumValN(FloatABI::Hard, "hard",
194 "Hard float ABI (uses FP registers)"),
195 clEnumValEnd));
196
197 static cl::opt<bool>
198 DontPlaceZerosInBSS("nozero-initialized-in-bss",
199 cl::desc("Don't place zero-initialized symbols into bss section"),
200 cl::init(false));
201
202 static cl::opt<bool>
203 EnableJITExceptionHandling("jit-enable-eh",
204 cl::desc("Emit exception handling information"),
205 cl::init(false));
206
207 // In debug builds, make this default to true.
208 #ifdef NDEBUG
209 #define EMIT_DEBUG false
210 #else
211 #define EMIT_DEBUG true
212 #endif
213 static cl::opt<bool>
214 EmitJitDebugInfo("jit-emit-debug",
215 cl::desc("Emit debug information to debugger"),
216 cl::init(EMIT_DEBUG));
217 #undef EMIT_DEBUG
218
219 static cl::opt<bool>
220 EmitJitDebugInfoToDisk("jit-emit-debug-to-disk",
221 cl::Hidden,
222 cl::desc("Emit debug info objfiles to disk"),
223 cl::init(false));
224
225 static cl::opt<bool>
226 EnableGuaranteedTailCallOpt("tailcallopt",
227 cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
228 cl::init(false));
229
230 static cl::opt<unsigned>
231 OverrideStackAlignment("stack-alignment",
232 cl::desc("Override default stack alignment"),
233 cl::init(0));
234
235 static cl::opt<bool>
236 EnableRealignStack("realign-stack",
237 cl::desc("Realign stack if needed"),
238 cl::init(true));
239
240 static cl::opt<std::string>
241 TrapFuncName("trap-func", cl::Hidden,
242 cl::desc("Emit a call to trap function rather than a trap instruction"),
243 cl::init(""));
244
245 static cl::opt<bool>
246 SegmentedStacks("segmented-stacks",
247 cl::desc("Use segmented stacks if possible."),
248 cl::init(false));
249
250 //===----------------------------------------------------------------------===//
251 // Command Line Options
252 // There are four kinds of command line options:
253 // 1. Bitcode option. Used to represent a bitcode.
254 // 2. Attribute options. Attributes describes the input file after them. For
255 // example, --as-needed affects the input file after this option. Attribute
256 // options are not attributes. Attribute options are the options that is
257 // used to define a legal attribute.
258 // 3. Scripting options, Used to represent a subset of link scripting
259 // language, such as --defsym.
260 // 4. General options. (the rest of options)
261 //===----------------------------------------------------------------------===//
262 // Bitcode Options
263 //===----------------------------------------------------------------------===//
264 static cl::opt<mcld::sys::fs::Path, false, llvm::cl::parser<mcld::sys::fs::Path> >
265 ArgBitcodeFilename("dB",
266 cl::desc("set default bitcode"),
267 cl::value_desc("bitcode"));
268
269 //===----------------------------------------------------------------------===//
270 // General Options
271 //===----------------------------------------------------------------------===//
272 static cl::opt<mcld::sys::fs::Path, false, llvm::cl::parser<mcld::sys::fs::Path> >
273 ArgOutputFilename("o",
274 cl::desc("Output filename"),
275 cl::value_desc("filename"));
276
277 static cl::alias
278 AliasOutputFilename("output",
279 cl::desc("alias for -o"),
280 cl::aliasopt(ArgOutputFilename));
281
282 static cl::opt<mcld::sys::fs::Path, false, llvm::cl::parser<mcld::sys::fs::Path> >
283 ArgSysRoot("sysroot",
284 cl::desc("Use directory as the location of the sysroot, overriding the configure-time default."),
285 cl::value_desc("directory"),
286 cl::ValueRequired);
287
288 static cl::list<std::string, bool, llvm::cl::SearchDirParser>
289 ArgSearchDirList("L",
290 cl::ZeroOrMore,
291 cl::desc("Add path searchdir to the list of paths that ld will search for archive libraries and ld control scripts."),
292 cl::value_desc("searchdir"),
293 cl::Prefix);
294
295 static cl::alias
296 ArgSearchDirListAlias("library-path",
297 cl::desc("alias for -L"),
298 cl::aliasopt(ArgSearchDirList));
299
300 static cl::opt<bool>
301 ArgTrace("t",
302 cl::desc("Print the names of the input files as ld processes them."));
303
304 static cl::alias
305 ArgTraceAlias("trace",
306 cl::desc("alias for -t"),
307 cl::aliasopt(ArgTrace));
308
309 static cl::opt<int>
310 ArgVerbose("verbose",
311 cl::init(-1),
312 cl::desc("Display the version number for ld and list the linker emulations supported."));
313
314 static cl::opt<bool>
315 ArgVersion("V",
316 cl::init(false),
317 cl::desc("Display the version number for MCLinker."));
318
319 static cl::opt<int>
320 ArgMaxErrorNum("error-limit",
321 cl::init(-1),
322 cl::desc("limits the maximum number of erros."));
323
324 static cl::opt<int>
325 ArgMaxWarnNum("warning-limit",
326 cl::init(-1),
327 cl::desc("limits the maximum number of warnings."));
328
329 static cl::opt<std::string>
330 ArgEntry("e",
331 cl::desc("Use entry as the explicit symbol for beginning execution of your program."),
332 cl::value_desc("entry"),
333 cl::ValueRequired);
334
335 static cl::alias
336 ArgEntryAlias("entry",
337 cl::desc("alias for -e"),
338 cl::aliasopt(ArgEntry));
339
340 static cl::opt<bool>
341 ArgBsymbolic("Bsymbolic",
342 cl::desc("Bind references within the shared library."),
343 cl::init(false));
344
345 static cl::opt<bool>
346 ArgBgroup("Bgroup",
347 cl::desc("Info the dynamic linker to perform lookups only inside the group."),
348 cl::init(false));
349
350 static cl::opt<std::string>
351 ArgSOName("soname",
352 cl::desc("Set internal name of shared library"),
353 cl::value_desc("name"));
354
355 static cl::opt<bool>
356 ArgNoUndefined("no-undefined",
357 cl::desc("Do not allow unresolved references"),
358 cl::init(false));
359
360 static cl::opt<bool>
361 ArgAllowMulDefs("allow-multiple-definition",
362 cl::desc("Allow multiple definition"),
363 cl::init(false));
364
365 static cl::opt<bool>
366 ArgEhFrameHdr("eh-frame-hdr",
367 cl::desc("Request creation of \".eh_frame_hdr\" section and ELF \"PT_GNU_EH_FRAME\" segment header."),
368 cl::init(false));
369
370 static cl::list<mcld::ZOption, bool, llvm::cl::parser<mcld::ZOption> >
371 ArgZOptionList("z",
372 cl::ZeroOrMore,
373 cl::desc("The -z options for GNU ld compatibility."),
374 cl::value_desc("keyword"),
375 cl::Prefix);
376
377 cl::opt<mcld::CodeGenFileType>
378 ArgFileType("filetype", cl::init(mcld::CGFT_EXEFile),
379 cl::desc("Choose a file type (not all types are supported by all targets):"),
380 cl::values(
381 clEnumValN(mcld::CGFT_ASMFile, "asm",
382 "Emit an assembly ('.s') file"),
383 clEnumValN(mcld::CGFT_OBJFile, "obj",
384 "Emit a relocatable object ('.o') file"),
385 clEnumValN(mcld::CGFT_DSOFile, "dso",
386 "Emit an dynamic shared object ('.so') file"),
387 clEnumValN(mcld::CGFT_EXEFile, "exe",
388 "Emit a executable ('.exe') file"),
389 clEnumValN(mcld::CGFT_NULLFile, "null",
390 "Emit nothing, for performance testing"),
391 clEnumValEnd));
392
393 static cl::opt<bool>
394 ArgShared("shared",
395 cl::desc("Create a shared library."),
396 cl::init(false));
397
398 static cl::alias
399 ArgSharedAlias("Bshareable",
400 cl::desc("alias for -shared"),
401 cl::aliasopt(ArgShared));
402
403 static cl::opt<bool>
404 ArgPIE("pie",
405 cl::desc("Emit a position-independent executable file"),
406 cl::init(false));
407
408 static cl::opt<bool>
409 ArgRelocatable("relocatable",
410 cl::desc("Generate relocatable output"),
411 cl::init(false));
412
413 static cl::alias
414 ArgRelocatableAlias("r",
415 cl::desc("alias for --relocatable"),
416 cl::aliasopt(ArgRelocatable));
417
418 static cl::opt<Reloc::Model>
419 ArgRelocModel("relocation-model",
420 cl::desc("Choose relocation model"),
421 cl::init(Reloc::Default),
422 cl::values(
423 clEnumValN(Reloc::Default, "default",
424 "Target default relocation model"),
425 clEnumValN(Reloc::Static, "static",
426 "Non-relocatable code"),
427 clEnumValN(Reloc::PIC_, "pic",
428 "Fully relocatable, position independent code"),
429 clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
430 "Relocatable external references, non-relocatable code"),
431 clEnumValEnd));
432
433 static cl::opt<bool>
434 ArgFPIC("fPIC",
435 cl::desc("Set relocation model to pic. The same as -relocation-model=pic."),
436 cl::init(false));
437
438 static cl::opt<std::string>
439 ArgDyld("dynamic-linker",
440 cl::ZeroOrMore,
441 cl::desc("Set the name of the dynamic linker."),
442 cl::value_desc("Program"));
443
444 namespace color {
445 enum Color {
446 Never,
447 Always,
448 Auto
449 };
450 } // namespace of color
451
452 static cl::opt<color::Color>
453 ArgColor("color",
454 cl::value_desc("WHEN"),
455 cl::desc("Surround the result strings with the marker"),
456 cl::init(color::Auto),
457 cl::values(
458 clEnumValN(color::Never, "never",
459 "do not surround result strings"),
460 clEnumValN(color::Always, "always",
461 "always surround result strings, even the output is a plain file"),
462 clEnumValN(color::Auto, "auto",
463 "surround result strings only if the output is a tty"),
464 clEnumValEnd));
465
466 static cl::opt<bool>
467 ArgDiscardLocals("discard-locals",
468 cl::desc("Delete all temporary local symbols."),
469 cl::init(false));
470
471 static cl::alias
472 ArgDiscardLocalsAlias("X",
473 cl::desc("alias for --discard-locals"),
474 cl::aliasopt(ArgDiscardLocals));
475
476 static cl::opt<bool>
477 ArgDiscardAll("discard-all",
478 cl::desc("Delete all local symbols."),
479 cl::init(false));
480
481 static cl::alias
482 ArgDiscardAllAlias("x",
483 cl::desc("alias for --discard-all"),
484 cl::aliasopt(ArgDiscardAll));
485
486 static cl::opt<bool>
487 ArgStripDebug("strip-debug",
488 cl::desc("Omit debugger symbol information from the output file."),
489 cl::init(false));
490
491 static cl::alias
492 ArgStripDebugAlias("S",
493 cl::desc("alias for --strip-debug"),
494 cl::aliasopt(ArgStripDebug));
495
496 static cl::opt<bool>
497 ArgStripAll("strip-all",
498 cl::desc("Omit all symbol information from the output file."),
499 cl::init(false));
500
501 static cl::alias
502 ArgStripAllAlias("s",
503 cl::desc("alias for --strip-all"),
504 cl::aliasopt(ArgStripAll));
505
506 static cl::opt<bool>
507 ArgNMagic("nmagic",
508 cl::desc("Do not page align data"),
509 cl::init(false));
510
511 static cl::alias
512 ArgNMagicAlias("n",
513 cl::desc("alias for --nmagic"),
514 cl::aliasopt(ArgNMagic));
515
516 static cl::opt<bool>
517 ArgOMagic("omagic",
518 cl::desc("Do not page align data, do not make text readonly"),
519 cl::init(false));
520
521 static cl::alias
522 ArgOMagicAlias("N",
523 cl::desc("alias for --omagic"),
524 cl::aliasopt(ArgOMagic));
525
526
527 static cl::opt<int>
528 ArgGPSize("G",
529 cl::desc("Set the maximum size of objects to be optimized using GP"),
530 cl::init(8));
531
532 /// @{
533 /// @name FIXME: begin of unsupported options
534 /// @}
535 static cl::opt<bool>
536 ArgGCSections("gc-sections",
537 cl::desc("Enable garbage collection of unused input sections."),
538 cl::init(false));
539
540 static cl::opt<bool>
541 ArgNoGCSections("no-gc-sections",
542 cl::desc("disable garbage collection of unused input sections."),
543 cl::init(false));
544
545 namespace icf {
546 enum Mode {
547 None,
548 All,
549 Safe
550 };
551 } // namespace of icf
552
553 static cl::opt<icf::Mode>
554 ArgICF("icf",
555 cl::ZeroOrMore,
556 cl::desc("Identical Code Folding"),
557 cl::init(icf::None),
558 cl::values(
559 clEnumValN(icf::None, "none",
560 "do not perform cold folding"),
561 clEnumValN(icf::All, "all",
562 "always preform cold folding"),
563 clEnumValN(icf::Safe, "safe",
564 "Folds ctors, dtors and functions whose pointers are definitely not taken."),
565 clEnumValEnd));
566
567 // FIXME: add this to target options?
568 static cl::opt<bool>
569 ArgFIXCA8("fix-cortex-a8",
570 cl::desc("Enable Cortex-A8 Thumb-2 branch erratum fix"),
571 cl::init(false));
572
573 static cl::opt<bool>
574 ArgExportDynamic("export-dynamic",
575 cl::desc("Export all dynamic symbols"),
576 cl::init(false));
577
578 static cl::alias
579 ArgExportDynamicAlias("E",
580 cl::desc("alias for --export-dynamic"),
581 cl::aliasopt(ArgExportDynamic));
582
583 static cl::opt<std::string>
584 ArgEmulation("m",
585 cl::ZeroOrMore,
586 cl::desc("Set GNU linker emulation"),
587 cl::value_desc("emulation"));
588
589 static cl::list<std::string, bool, llvm::cl::SearchDirParser>
590 ArgRuntimePathLink("rpath-link",
591 cl::ZeroOrMore,
592 cl::desc("Add a directory to the link time library search path"),
593 cl::value_desc("dir"));
594
595 static cl::list<std::string>
596 ArgExcludeLIBS("exclude-libs",
597 cl::CommaSeparated,
598 cl::desc("Exclude libraries from automatic export"),
599 cl::value_desc("lib1,lib2,..."));
600
601 static cl::opt<std::string>
602 ArgBuildID("build-id",
603 cl::desc("Request creation of \".note.gnu.build-id\" ELF note section."),
604 cl::value_desc("style"),
605 cl::ValueOptional);
606
607 static cl::opt<std::string>
608 ArgForceUndefined("u",
609 cl::desc("Force symbol to be undefined in the output file"),
610 cl::value_desc("symbol"));
611
612 static cl::alias
613 ArgForceUndefinedAlias("undefined",
614 cl::desc("alias for -u"),
615 cl::aliasopt(ArgForceUndefined));
616
617 static cl::opt<std::string>
618 ArgVersionScript("version-script",
619 cl::desc("Version script."),
620 cl::value_desc("Version script"));
621
622 static cl::opt<bool>
623 ArgWarnCommon("warn-common",
624 cl::desc("warn common symbol"),
625 cl::init(false));
626
627 static cl::opt<mcld::GeneralOptions::HashStyle>
628 ArgHashStyle("hash-style", cl::init(mcld::GeneralOptions::SystemV),
629 cl::desc("Set the type of linker's hash table(s)."),
630 cl::values(
631 clEnumValN(mcld::GeneralOptions::SystemV, "sysv",
632 "classic ELF .hash section"),
633 clEnumValN(mcld::GeneralOptions::GNU, "gnu",
634 "new style GNU .gnu.hash section"),
635 clEnumValN(mcld::GeneralOptions::Both, "both",
636 "both the classic ELF and new style GNU hash tables"),
637 clEnumValEnd));
638
639 static cl::opt<std::string>
640 ArgFilter("F",
641 cl::desc("Filter for shared object symbol table"),
642 cl::value_desc("name"));
643
644 static cl::alias
645 ArgFilterAlias("filter",
646 cl::desc("alias for -F"),
647 cl::aliasopt(ArgFilterAlias));
648
649 static cl::list<std::string>
650 ArgAuxiliary("f",
651 cl::ZeroOrMore,
652 cl::desc("Auxiliary filter for shared object symbol table"),
653 cl::value_desc("name"));
654
655 static cl::alias
656 ArgAuxiliaryAlias("auxiliary",
657 cl::desc("alias for -f"),
658 cl::aliasopt(ArgAuxiliary));
659
660 static cl::opt<bool>
661 ArgUseGold("use-gold",
662 cl::desc("GCC/collect2 compatibility: uses ld.gold. Ignored"),
663 cl::init(false));
664
665 static cl::opt<bool>
666 ArgUseMCLD("use-mcld",
667 cl::desc("GCC/collect2 compatibility: uses ld.mcld. Ignored"),
668 cl::init(false));
669
670 static cl::opt<bool>
671 ArgUseLD("use-ld",
672 cl::desc("GCC/collect2 compatibility: uses ld.bfd. Ignored"),
673 cl::init(false));
674
675 static cl::opt<bool>
676 ArgEB("EB",
677 cl::desc("Link big-endian objects. This affects the default output format."),
678 cl::init(false));
679
680 static cl::opt<bool>
681 ArgEL("EL",
682 cl::desc("Link little-endian objects. This affects the default output format."),
683 cl::init(false));
684
685 static cl::list<std::string>
686 ArgPlugin("plugin",
687 cl::desc("Load a plugin library."),
688 cl::value_desc("plugin"));
689
690 static cl::list<std::string>
691 ArgPluginOpt("plugin-opt",
692 cl::desc(" Pass an option to the plugin."),
693 cl::value_desc("option"));
694
695 static cl::opt<bool>
696 ArgSVR4Compatibility("Qy",
697 cl::desc("This option is ignored for SVR4 compatibility"),
698 cl::init(false));
699
700 static cl::list<std::string>
701 ArgY("Y",
702 cl::desc("Add path to the default library search path"),
703 cl::value_desc("default-search-path"));
704
705 /// @{
706 /// @name FIXME: end of unsupported options
707 /// @}
708
709 static cl::opt<bool>
710 ArgNoStdlib("nostdlib",
711 cl::desc("Only search lib dirs explicitly specified on cmdline"),
712 cl::init(false));
713
714 static cl::list<std::string, bool, llvm::cl::SearchDirParser>
715 ArgRuntimePath("rpath",
716 cl::ZeroOrMore,
717 cl::desc("Add a directory to the runtime library search path"),
718 cl::value_desc("dir"));
719
720 static cl::alias
721 ArgRuntimePathAlias("R",
722 cl::desc("alias for --rpath"),
723 cl::aliasopt(ArgRuntimePath), cl::Prefix);
724
725 static cl::opt<bool>
726 ArgEnableNewDTags("enable-new-dtags",
727 cl::desc("Enable use of DT_RUNPATH and DT_FLAGS"),
728 cl::init(false));
729
730 static cl::opt<bool>
731 ArgPrintMap("M",
732 cl::desc("Print a link map to the standard output."),
733 cl::init(false));
734
735 static cl::alias
736 ArgPrintMapAlias("print-map",
737 cl::desc("alias for -M"),
738 cl::aliasopt(ArgPrintMap));
739
740 static bool ArgFatalWarnings;
741
742 static cl::opt<bool, true, cl::FalseParser>
743 ArgNoFatalWarnings("no-fatal-warnings",
744 cl::location(ArgFatalWarnings),
745 cl::desc("do not turn warnings into errors"),
746 cl::init(false),
747 cl::ValueDisallowed);
748
749 static cl::opt<bool, true>
750 ArgFatalWarningsFlag("fatal-warnings",
751 cl::location(ArgFatalWarnings),
752 cl::desc("turn all warnings into errors"),
753 cl::init(false),
754 cl::ValueDisallowed);
755
756 static cl::opt<bool>
757 ArgWarnSharedTextrel("warn-shared-textrel",
758 cl::desc("Warn if adding DT_TEXTREL in a shared object."),
759 cl::init(false));
760
761 namespace format {
762 enum Format {
763 Binary,
764 Unknown // decided by triple
765 };
766 } // namespace of format
767
768 static cl::opt<format::Format>
769 ArgFormat("b",
770 cl::value_desc("Format"),
771 cl::desc("set input format"),
772 cl::init(format::Unknown),
773 cl::values(
774 clEnumValN(format::Binary, "binary",
775 "read in binary machine code."),
776 clEnumValEnd));
777
778 static cl::alias
779 ArgFormatAlias("format",
780 cl::desc("alias for -b"),
781 cl::aliasopt(ArgFormat));
782
783 static cl::opt<format::Format>
784 ArgOFormat("oformat",
785 cl::value_desc("Format"),
786 cl::desc("set output format"),
787 cl::init(format::Unknown),
788 cl::values(
789 clEnumValN(format::Binary, "binary",
790 "generate binary machine code."),
791 clEnumValEnd));
792
793 static cl::opt<bool>
794 ArgDefineCommon("d",
795 cl::ZeroOrMore,
796 cl::desc("Define common symbol"),
797 cl::init(false));
798
799 static cl::alias
800 ArgDefineCommonAlias1("dc",
801 cl::ZeroOrMore,
802 cl::desc("alias for -d"),
803 cl::aliasopt(ArgDefineCommon));
804
805 static cl::alias
806 ArgDefineCommonAlias2("dp",
807 cl::ZeroOrMore,
808 cl::desc("alias for -d"),
809 cl::aliasopt(ArgDefineCommon));
810
811 //===----------------------------------------------------------------------===//
812 // Scripting Options
813 //===----------------------------------------------------------------------===//
814 static cl::list<std::string>
815 ArgWrapList("wrap",
816 cl::ZeroOrMore,
817 cl::desc("Use a wrap function fo symbol."),
818 cl::value_desc("symbol"));
819
820 static cl::list<std::string>
821 ArgPortList("portable",
822 cl::ZeroOrMore,
823 cl::desc("Use a portable function fo symbol."),
824 cl::value_desc("symbol"));
825
826 static cl::list<std::string>
827 ArgAddressMapList("section-start",
828 cl::ZeroOrMore,
829 cl::desc("Locate a output section at the given absolute address"),
830 cl::value_desc("Set address of section"),
831 cl::Prefix);
832
833 static cl::list<std::string>
834 ArgDefSymList("defsym",
835 cl::ZeroOrMore,
836 cl::desc("Define a symbol"),
837 cl::value_desc("symbol=expression"));
838
839 static cl::opt<unsigned long long>
840 ArgBssSegAddr("Tbss",
841 cl::desc("Set the address of the bss segment"),
842 cl::init(-1U));
843
844 static cl::opt<unsigned long long>
845 ArgDataSegAddr("Tdata",
846 cl::desc("Set the address of the data segment"),
847 cl::init(-1U));
848
849 static cl::opt<unsigned long long>
850 ArgTextSegAddr("Ttext",
851 cl::desc("Set the address of the text segment"),
852 cl::init(-1U));
853
854 //===----------------------------------------------------------------------===//
855 // non-member functions
856 //===----------------------------------------------------------------------===//
857 /// GetOutputStream - get the output stream.
GetOutputStream(const char * pTargetName,Triple::OSType pOSType,mcld::CodeGenFileType pFileType,const mcld::sys::fs::Path & pInputFilename,mcld::sys::fs::Path & pOutputFilename)858 static mcld::ToolOutputFile *GetOutputStream(const char* pTargetName,
859 Triple::OSType pOSType,
860 mcld::CodeGenFileType pFileType,
861 const mcld::sys::fs::Path& pInputFilename,
862 mcld::sys::fs::Path& pOutputFilename)
863 {
864 if (pOutputFilename.empty()) {
865 if (0 == pInputFilename.native().compare("-"))
866 pOutputFilename.assign("-");
867 else {
868 switch(pFileType) {
869 case mcld::CGFT_ASMFile: {
870 if (0 == pInputFilename.native().compare("-"))
871 pOutputFilename.assign("_out");
872 else
873 pOutputFilename.assign(pInputFilename.stem().native());
874
875 if (0 == strcmp(pTargetName, "c"))
876 pOutputFilename.native() += ".cbe.c";
877 else if (0 == strcmp(pTargetName, "cpp"))
878 pOutputFilename.native() += ".cpp";
879 else
880 pOutputFilename.native() += ".s";
881 }
882 break;
883
884 case mcld::CGFT_OBJFile: {
885 if (0 == pInputFilename.native().compare("-"))
886 pOutputFilename.assign("_out");
887 else
888 pOutputFilename.assign(pInputFilename.stem().native());
889
890 if (pOSType == Triple::Win32)
891 pOutputFilename.native() += ".obj";
892 else
893 pOutputFilename.native() += ".o";
894 }
895 break;
896
897 case mcld::CGFT_PARTIAL: {
898 if (Triple::Win32 == pOSType) {
899 if (0 == pInputFilename.native().compare("-"))
900 pOutputFilename.assign("_out");
901 else
902 pOutputFilename.assign(pInputFilename.stem().native());
903 pOutputFilename.native() += ".obj";
904 }
905 else
906 pOutputFilename.assign("a.out");
907 }
908 break;
909
910 case mcld::CGFT_DSOFile: {
911 if (Triple::Win32 == pOSType) {
912 if (0 == pInputFilename.native().compare("-"))
913 pOutputFilename.assign("_out");
914 else
915 pOutputFilename.assign(pInputFilename.stem().native());
916 pOutputFilename.native() += ".dll";
917 }
918 else
919 pOutputFilename.assign("a.out");
920 }
921 break;
922
923 case mcld::CGFT_EXEFile: {
924 if (Triple::Win32 == pOSType) {
925 if (0 == pInputFilename.native().compare("-"))
926 pOutputFilename.assign("_out");
927 else
928 pOutputFilename.assign(pInputFilename.stem().native());
929 pOutputFilename.native() += ".exe";
930 }
931 else
932 pOutputFilename.assign("a.out");
933 }
934 break;
935
936 case mcld::CGFT_NULLFile:
937 break;
938 default:
939 llvm::report_fatal_error("Unknown output file type.\n");
940 } // end of switch
941 } // end of ! pInputFilename == "-"
942 } // end of if empty pOutputFilename
943
944 mcld::FileHandle::Permission permission;
945 switch (pFileType) {
946 default: assert(0 && "Unknown file type");
947 case mcld::CGFT_ASMFile:
948 case mcld::CGFT_OBJFile:
949 case mcld::CGFT_PARTIAL:
950 permission = mcld::FileHandle::Permission(0x644);
951 break;
952 case mcld::CGFT_DSOFile:
953 case mcld::CGFT_EXEFile:
954 case mcld::CGFT_BINARY:
955 case mcld::CGFT_NULLFile:
956 permission = mcld::FileHandle::Permission(0x755);
957 break;
958 }
959
960 // Open the file.
961 mcld::ToolOutputFile* result_output =
962 new mcld::ToolOutputFile(pOutputFilename,
963 mcld::FileHandle::ReadWrite |
964 mcld::FileHandle::Create |
965 mcld::FileHandle::Truncate,
966 permission);
967
968 return result_output;
969 }
970
971 /// ParseProgName - Parse program name
972 /// This function simplifies cross-compiling by reading triple from the program
973 /// name. For example, if the program name is `arm-linux-eabi-ld.mcld', we can
974 /// get the triple is arm-linux-eabi by the program name.
ParseProgName(const char * progname)975 static std::string ParseProgName(const char *progname)
976 {
977 static const char *suffixes[] = {
978 "ld",
979 "ld.mcld",
980 };
981
982 std::string ProgName(mcld::sys::fs::Path(progname).stem().native());
983
984 for (size_t i = 0; i < sizeof(suffixes) / sizeof(suffixes[0]); ++i) {
985 if (ProgName == suffixes[i])
986 return std::string();
987 }
988
989 StringRef ProgNameRef(ProgName);
990 StringRef Prefix;
991
992 for (size_t i = 0; i < sizeof(suffixes) / sizeof(suffixes[0]); ++i) {
993 if (!ProgNameRef.endswith(suffixes[i]))
994 continue;
995
996 StringRef::size_type LastComponent = ProgNameRef.rfind('-',
997 ProgNameRef.size() - strlen(suffixes[i]));
998 if (LastComponent == StringRef::npos)
999 continue;
1000 StringRef Prefix = ProgNameRef.slice(0, LastComponent);
1001 std::string IgnoredError;
1002 if (!llvm::TargetRegistry::lookupTarget(Prefix, IgnoredError))
1003 continue;
1004 return Prefix.str();
1005 }
1006 return std::string();
1007 }
1008
ParseEmulation(const std::string & pEmulation)1009 static Triple ParseEmulation(const std::string& pEmulation)
1010 {
1011 Triple result = StringSwitch<Triple>(pEmulation)
1012 .Case("armelf_linux_eabi", Triple("arm", "", "linux", "gnueabi"))
1013 .Case("elf_i386", Triple("i386", "", "", "gnu"))
1014 .Case("elf_x86_64", Triple("x86_64", "", "", "gnu"))
1015 .Case("elf32_x86_64", Triple("x86_64", "", "", "gnux32"))
1016 .Case("elf_i386_fbsd", Triple("i386", "", "freebsd", "gnu"))
1017 .Case("elf_x86_64_fbsd", Triple("x86_64", "", "freebsd", "gnu"))
1018 .Case("elf32ltsmip", Triple("mipsel", "", "", "gnu"))
1019 .Default(Triple());
1020
1021 if (result.getArch() == Triple::UnknownArch &&
1022 result.getOS() == Triple::UnknownOS &&
1023 result.getEnvironment() == Triple::UnknownEnvironment)
1024 mcld::error(mcld::diag::err_invalid_emulation) << pEmulation << "\n";
1025
1026 return result;
1027 }
1028
ShouldColorize()1029 static bool ShouldColorize()
1030 {
1031 const char* term = getenv("TERM");
1032 return term && (0 != strcmp(term, "dumb"));
1033 }
1034
ProcessLinkerOptionsFromCommand(mcld::LinkerScript & pScript,mcld::LinkerConfig & pConfig)1035 static bool ProcessLinkerOptionsFromCommand(mcld::LinkerScript& pScript,
1036 mcld::LinkerConfig& pConfig)
1037 {
1038 // ----- Set up General Options ----- //
1039 // set up colorize
1040 switch (ArgColor) {
1041 case color::Never:
1042 pConfig.options().setColor(false);
1043 break;
1044 case color::Always:
1045 pConfig.options().setColor(true);
1046 break;
1047 case color::Auto:
1048 bool color_option = ShouldColorize() &&
1049 llvm::sys::Process::FileDescriptorIsDisplayed(STDOUT_FILENO);
1050 pConfig.options().setColor(color_option);
1051 break;
1052 }
1053
1054 mcld::outs().setColor(pConfig.options().color());
1055 mcld::errs().setColor(pConfig.options().color());
1056
1057 // set up soname
1058 pConfig.options().setSOName(ArgSOName);
1059
1060 // add all rpath entries
1061 cl::list<std::string>::iterator rp;
1062 cl::list<std::string>::iterator rpEnd = ArgRuntimePath.end();
1063 for (rp = ArgRuntimePath.begin(); rp != rpEnd; ++rp) {
1064 pConfig.options().getRpathList().push_back(*rp);
1065 }
1066
1067 // --fatal-warnings
1068 // pConfig.options().setFatalWarnings(ArgFatalWarnings);
1069
1070 // -shared or -pie
1071 if (true == ArgShared || true == ArgPIE) {
1072 ArgFileType = mcld::CGFT_DSOFile;
1073 }
1074 else if (true == ArgRelocatable) {
1075 ArgFileType = mcld::CGFT_PARTIAL;
1076 }
1077 else if (format::Binary == ArgOFormat) {
1078 ArgFileType = mcld::CGFT_BINARY;
1079 }
1080
1081 // -b [input-format], --format=[input-format]
1082 if (format::Binary == ArgFormat)
1083 pConfig.options().setBinaryInput();
1084
1085 // -V
1086 if (ArgVersion) {
1087 mcld::outs() << "MCLinker - "
1088 << mcld::LinkerConfig::version()
1089 << "\n";
1090 }
1091
1092 // set up sysroot
1093 if (!ArgSysRoot.empty()) {
1094 if (exists(ArgSysRoot) && is_directory(ArgSysRoot))
1095 pScript.setSysroot(ArgSysRoot);
1096 }
1097
1098 // add all search directories
1099 cl::list<std::string>::iterator sd;
1100 cl::list<std::string>::iterator sdEnd = ArgSearchDirList.end();
1101 for (sd=ArgSearchDirList.begin(); sd!=sdEnd; ++sd) {
1102 if (!pScript.directories().insert(*sd)) {
1103 // FIXME: need a warning function
1104 errs() << "WARNING: can not open search directory `-L"
1105 << *sd
1106 << "'.\n";
1107 }
1108 }
1109
1110 pConfig.options().setPIE(ArgPIE);
1111 pConfig.options().setTrace(ArgTrace);
1112 pConfig.options().setVerbose(ArgVerbose);
1113 pConfig.options().setMaxErrorNum(ArgMaxErrorNum);
1114 pConfig.options().setMaxWarnNum(ArgMaxWarnNum);
1115 pConfig.options().setEntry(ArgEntry);
1116 pConfig.options().setBsymbolic(ArgBsymbolic);
1117 pConfig.options().setBgroup(ArgBgroup);
1118 pConfig.options().setDyld(ArgDyld);
1119 pConfig.options().setNoUndefined(ArgNoUndefined);
1120 pConfig.options().setMulDefs(ArgAllowMulDefs);
1121 pConfig.options().setEhFrameHdr(ArgEhFrameHdr);
1122 pConfig.options().setNMagic(ArgNMagic);
1123 pConfig.options().setOMagic(ArgOMagic);
1124 pConfig.options().setStripDebug(ArgStripDebug || ArgStripAll);
1125 pConfig.options().setExportDynamic(ArgExportDynamic);
1126 pConfig.options().setWarnSharedTextrel(ArgWarnSharedTextrel);
1127 pConfig.options().setDefineCommon(ArgDefineCommon);
1128 pConfig.options().setNewDTags(ArgEnableNewDTags);
1129 pConfig.options().setHashStyle(ArgHashStyle);
1130 pConfig.options().setNoStdlib(ArgNoStdlib);
1131 pConfig.options().setPrintMap(ArgPrintMap);
1132 pConfig.options().setGPSize(ArgGPSize);
1133
1134 if (ArgStripAll)
1135 pConfig.options().setStripSymbols(mcld::GeneralOptions::StripAllSymbols);
1136 else if (ArgDiscardAll)
1137 pConfig.options().setStripSymbols(mcld::GeneralOptions::StripLocals);
1138 else if (ArgDiscardLocals)
1139 pConfig.options().setStripSymbols(mcld::GeneralOptions::StripTemporaries);
1140 else
1141 pConfig.options().setStripSymbols(mcld::GeneralOptions::KeepAllSymbols);
1142
1143 // set up rename map, for --wrap
1144 cl::list<std::string>::iterator wname;
1145 cl::list<std::string>::iterator wnameEnd = ArgWrapList.end();
1146 for (wname = ArgWrapList.begin(); wname != wnameEnd; ++wname) {
1147 bool exist = false;
1148
1149 // add wname -> __wrap_wname
1150 mcld::StringEntry<llvm::StringRef>* to_wrap =
1151 pScript.renameMap().insert(*wname, exist);
1152
1153 std::string to_wrap_str = "__wrap_" + *wname;
1154 to_wrap->setValue(to_wrap_str);
1155
1156 if (exist)
1157 mcld::warning(mcld::diag::rewrap) << *wname << to_wrap_str;
1158
1159 // add __real_wname -> wname
1160 std::string from_real_str = "__real_" + *wname;
1161 mcld::StringEntry<llvm::StringRef>* from_real =
1162 pScript.renameMap().insert(from_real_str, exist);
1163 from_real->setValue(*wname);
1164 if (exist)
1165 mcld::warning(mcld::diag::rewrap) << *wname << from_real_str;
1166 } // end of for
1167
1168 // set up rename map, for --portable
1169 cl::list<std::string>::iterator pname;
1170 cl::list<std::string>::iterator pnameEnd = ArgPortList.end();
1171 for (pname = ArgPortList.begin(); pname != pnameEnd; ++pname) {
1172 bool exist = false;
1173
1174 // add pname -> pname_portable
1175 mcld::StringEntry<llvm::StringRef>* to_port =
1176 pScript.renameMap().insert(*pname, exist);
1177
1178 std::string to_port_str = *pname + "_portable";
1179 to_port->setValue(to_port_str);
1180
1181 if (exist)
1182 mcld::warning(mcld::diag::rewrap) << *pname << to_port_str;
1183
1184 // add __real_pname -> pname
1185 std::string from_real_str = "__real_" + *pname;
1186 mcld::StringEntry<llvm::StringRef>* from_real =
1187 pScript.renameMap().insert(from_real_str, exist);
1188
1189 from_real->setValue(*pname);
1190 if (exist)
1191 mcld::warning(mcld::diag::rewrap) << *pname << from_real_str;
1192 } // end of for
1193
1194 // add -z options
1195 cl::list<mcld::ZOption>::iterator zOpt;
1196 cl::list<mcld::ZOption>::iterator zOptEnd = ArgZOptionList.end();
1197 for (zOpt = ArgZOptionList.begin(); zOpt != zOptEnd; ++zOpt) {
1198 pConfig.options().addZOption(*zOpt);
1199 }
1200
1201 if (ArgGCSections) {
1202 mcld::warning(mcld::diag::warn_unsupported_option) << ArgGCSections.ArgStr;
1203 }
1204
1205 // set up icf mode
1206 switch (ArgICF) {
1207 case icf::None:
1208 break;
1209 case icf::All:
1210 case icf::Safe:
1211 default:
1212 mcld::warning(mcld::diag::warn_unsupported_option) << ArgICF.ArgStr;
1213 break;
1214 }
1215
1216 if (ArgFIXCA8) {
1217 mcld::warning(mcld::diag::warn_unsupported_option) << ArgFIXCA8.ArgStr;
1218 }
1219
1220 // add address mappings
1221 // -Ttext
1222 if (-1U != ArgTextSegAddr) {
1223 bool exist = false;
1224 mcld::StringEntry<uint64_t>* text_mapping =
1225 pScript.addressMap().insert(".text", exist);
1226 text_mapping->setValue(ArgTextSegAddr);
1227 }
1228 // -Tdata
1229 if (-1U != ArgDataSegAddr) {
1230 bool exist = false;
1231 mcld::StringEntry<uint64_t>* data_mapping =
1232 pScript.addressMap().insert(".data", exist);
1233 data_mapping->setValue(ArgDataSegAddr);
1234 }
1235 // -Tbss
1236 if (-1U != ArgBssSegAddr) {
1237 bool exist = false;
1238 mcld::StringEntry<uint64_t>* bss_mapping =
1239 pScript.addressMap().insert(".bss", exist);
1240 bss_mapping->setValue(ArgBssSegAddr);
1241 }
1242 // --section-start SECTION=ADDRESS
1243 for (cl::list<std::string>::iterator
1244 it = ArgAddressMapList.begin(), ie = ArgAddressMapList.end();
1245 it != ie; ++it) {
1246 // FIXME: Add a cl::parser
1247 size_t pos = (*it).find_last_of('=');
1248 llvm::StringRef script(*it);
1249 uint64_t address = 0x0;
1250 script.substr(pos + 1).getAsInteger(0, address);
1251 bool exist = false;
1252 mcld::StringEntry<uint64_t>* addr_mapping =
1253 pScript.addressMap().insert(script.substr(0, pos), exist);
1254 addr_mapping->setValue(address);
1255 }
1256
1257 // --defsym symbols
1258 for (cl::list<std::string>::iterator
1259 it = ArgDefSymList.begin(), ie = ArgDefSymList.end();
1260 it != ie ; ++it) {
1261 llvm::StringRef expression(*it);
1262 size_t pos = expression.find_last_of('=');
1263 if (pos == expression.size() - 1) {
1264 errs() << "defsym option: expression must not end with '='\n";
1265 return false;
1266 }
1267 if (llvm::StringRef::npos == pos) {
1268 errs() << "syntax : --defsym symbol=expression\n";
1269 return false;
1270 }
1271 bool exist = false;
1272 // FIXME: This will not work with multiple destinations such as
1273 // --defsym abc=pqr=expression
1274
1275 mcld::StringEntry<llvm::StringRef> *defsyms =
1276 pScript.defSymMap().insert(expression.substr(0,pos),exist);
1277 defsyms->setValue(expression.substr(pos + 1));
1278 }
1279
1280 // set up filter/aux filter for shared object
1281 pConfig.options().setFilter(ArgFilter);
1282
1283 cl::list<std::string>::iterator aux;
1284 cl::list<std::string>::iterator auxEnd = ArgAuxiliary.end();
1285 for (aux = ArgAuxiliary.begin(); aux != auxEnd; ++aux)
1286 pConfig.options().getAuxiliaryList().push_back(*aux);
1287
1288 return true;
1289 }
1290
main(int argc,char * argv[])1291 int main(int argc, char* argv[])
1292 {
1293 sys::PrintStackTraceOnErrorSignal();
1294
1295 LLVMContext &Context = getGlobalContext();
1296 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
1297
1298 // Initialize targets first, so that --version shows registered targets.
1299 InitializeAllTargets();
1300 InitializeAllAsmPrinters();
1301 InitializeAllAsmParsers();
1302 InitializeAllTargetMCs();
1303 mcld::InitializeAllTargets();
1304 mcld::InitializeAllLinkers();
1305 mcld::InitializeAllEmulations();
1306 mcld::InitializeAllDiagnostics();
1307
1308 cl::ParseCommandLineOptions(argc, argv, "MCLinker\n");
1309
1310 #ifdef ENABLE_UNITTEST
1311 if (UnitTest) {
1312 return unit_test( argc, argv );
1313 }
1314 #endif
1315
1316 // Load the module to be compiled...
1317 std::auto_ptr<llvm::Module> M;
1318
1319 // Load the module to be linked...
1320 mcld::LinkerScript LDScript;
1321 mcld::Module LDIRModule(LDScript);
1322 mcld::LinkerConfig LDConfig;
1323
1324 // Process the linker input from the command line
1325 if (!ProcessLinkerOptionsFromCommand(LDScript, LDConfig)) {
1326 errs() << argv[0] << ": failed to process linker options from command line!\n";
1327 return 1;
1328 }
1329
1330 if (ArgBitcodeFilename.empty() &&
1331 (mcld::CGFT_DSOFile != ArgFileType &&
1332 mcld::CGFT_EXEFile != ArgFileType &&
1333 mcld::CGFT_PARTIAL != ArgFileType &&
1334 mcld::CGFT_BINARY != ArgFileType)) {
1335 // If the file is not given, forcefully read from stdin
1336 if (ArgVerbose >= 0) {
1337 errs() << "** The bitcode/llvm asm file is not given. Read from stdin.\n"
1338 << "** Specify input bitcode/llvm asm file by\n\n"
1339 << " llvm-mcld -dB [the bitcode/llvm asm]\n\n";
1340 }
1341
1342 ArgBitcodeFilename.assign("-");
1343 }
1344
1345 if (!ArgBitcodeFilename.empty()) {
1346 SMDiagnostic Err;
1347 M.reset(ParseIRFile(ArgBitcodeFilename.native(), Err, Context));
1348
1349 if (M.get() == 0) {
1350 Err.print(argv[0], errs());
1351 errs() << "** Failed to to the given bitcode/llvm asm file '"
1352 << ArgBitcodeFilename.native() << "'. **\n";
1353 return 1;
1354 }
1355 }
1356 else {
1357 // If here, output must be dynamic shared object (mcld::CGFT_DSOFile) and
1358 // executable file (mcld::CGFT_EXEFile).
1359 M.reset(new Module("Empty Module", Context));
1360 }
1361 Module &mod = *M.get();
1362
1363 // If we are supposed to override the target triple, do so now.
1364 Triple TheTriple;
1365 if (!TargetTriple.empty()) {
1366 // 1. Use the triple from command.
1367 TheTriple.setTriple(TargetTriple);
1368 mod.setTargetTriple(TargetTriple);
1369 } else if (!mod.getTargetTriple().empty()) {
1370 // 2. Use the triple in the input Module.
1371 TheTriple.setTriple(mod.getTargetTriple());
1372 } else {
1373 std::string ProgNameTriple = ParseProgName(argv[0]);
1374 if (!ProgNameTriple.empty()) {
1375 // 3. Use the triple from the program name prefix.
1376 TheTriple.setTriple(ProgNameTriple);
1377 mod.setTargetTriple(ProgNameTriple);
1378 } else {
1379 // 4. Use the default target triple.
1380 TheTriple.setTriple(mcld::sys::getDefaultTargetTriple());
1381 if (!ArgEmulation.empty()) {
1382 // Process target emulation.
1383 Triple EmulationTriple = ParseEmulation(ArgEmulation);
1384 if (EmulationTriple.getArch() != Triple::UnknownArch)
1385 TheTriple.setArch(EmulationTriple.getArch());
1386 if (EmulationTriple.getOS() != Triple::UnknownOS)
1387 TheTriple.setOS(EmulationTriple.getOS());
1388 if (EmulationTriple.getEnvironment() != Triple::UnknownEnvironment)
1389 TheTriple.setEnvironment(EmulationTriple.getEnvironment());
1390 }
1391 }
1392 }
1393
1394 // Allocate target machine. First, check whether the user has explicitly
1395 // specified an architecture to compile for. If so we have to look it up by
1396 // name, because it might be a backend that has no mapping to a target triple.
1397 const mcld::Target *TheTarget = 0;
1398 if (!MArch.empty()) {
1399 for (mcld::TargetRegistry::iterator it = mcld::TargetRegistry::begin(),
1400 ie = mcld::TargetRegistry::end(); it != ie; ++it) {
1401 if (MArch == (*it)->get()->getName()) {
1402 TheTarget = *it;
1403 break;
1404 }
1405 }
1406
1407 if (!TheTarget) {
1408 errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n";
1409 return 1;
1410 }
1411
1412 // Adjust the triple to match (if known), otherwise stick with the
1413 // module/host triple.
1414 Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
1415 if (Type != Triple::UnknownArch)
1416 TheTriple.setArch(Type);
1417 }
1418 else {
1419 std::string Err;
1420 TheTarget = mcld::TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
1421 if (TheTarget == 0) {
1422 errs() << "error: auto-selecting target `" << TheTriple.getTriple()
1423 << "'\n"
1424 << "Please use the -march option to explicitly select a target.\n"
1425 << "Example:\n"
1426 << " $ " << argv[0] << " -march=arm\n";
1427 return 1;
1428 }
1429 }
1430 // Set up mcld::LinkerConfig
1431 LDConfig.targets().setTriple(TheTriple);
1432
1433 // Package up features to be passed to target/subtarget
1434 std::string FeaturesStr;
1435 if (MAttrs.size()) {
1436 SubtargetFeatures Features;
1437 for (unsigned i = 0; i != MAttrs.size(); ++i)
1438 Features.AddFeature(MAttrs[i]);
1439 FeaturesStr = Features.getString();
1440 }
1441
1442 CodeGenOpt::Level OLvl = CodeGenOpt::Default;
1443 switch (OptLevel) {
1444 default:
1445 errs() << argv[0] << ": invalid optimization level.\n";
1446 return 1;
1447 case ' ': break;
1448 case '0': OLvl = CodeGenOpt::None; break;
1449 case '1': OLvl = CodeGenOpt::Less; break;
1450 case '2': OLvl = CodeGenOpt::Default; break;
1451 case '3': OLvl = CodeGenOpt::Aggressive; break;
1452 }
1453
1454 // set -fPIC
1455 if (ArgFPIC)
1456 ArgRelocModel = Reloc::PIC_;
1457
1458 TargetOptions Options;
1459 Options.LessPreciseFPMADOption = EnableFPMAD;
1460 Options.NoFramePointerElim = DisableFPElim;
1461 Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
1462 Options.AllowFPOpFusion = FuseFPOps;
1463 Options.UnsafeFPMath = EnableUnsafeFPMath;
1464 Options.NoInfsFPMath = EnableNoInfsFPMath;
1465 Options.NoNaNsFPMath = EnableNoNaNsFPMath;
1466 Options.HonorSignDependentRoundingFPMathOption =
1467 EnableHonorSignDependentRoundingFPMath;
1468 Options.UseSoftFloat = GenerateSoftFloatCalls;
1469 if (FloatABIForCalls != FloatABI::Default)
1470 Options.FloatABIType = FloatABIForCalls;
1471 Options.NoZerosInBSS = DontPlaceZerosInBSS;
1472 Options.JITExceptionHandling = EnableJITExceptionHandling;
1473 Options.JITEmitDebugInfo = EmitJitDebugInfo;
1474 Options.JITEmitDebugInfoToDisk = EmitJitDebugInfoToDisk;
1475 Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
1476 Options.StackAlignmentOverride = OverrideStackAlignment;
1477 Options.RealignStack = EnableRealignStack;
1478 Options.TrapFuncName = TrapFuncName;
1479 Options.EnableSegmentedStacks = SegmentedStacks;
1480
1481 std::auto_ptr<mcld::MCLDTargetMachine> target_machine(
1482 TheTarget->createTargetMachine(TheTriple.getTriple(),
1483 MCPU, FeaturesStr, Options,
1484 ArgRelocModel, CMModel, OLvl));
1485 assert(target_machine.get() && "Could not allocate target machine!");
1486 mcld::MCLDTargetMachine &TheTargetMachine = *target_machine.get();
1487
1488 LDConfig.targets().setTargetCPU(MCPU);
1489 LDConfig.targets().setTargetFeatureString(FeaturesStr);
1490
1491 TheTargetMachine.getTM().setMCUseLoc(false);
1492 TheTargetMachine.getTM().setMCUseCFI(false);
1493
1494 // FIXME: Move the initialization of LineInfo to mcld::Linker when we
1495 // finish LineInfo's implementation.
1496 OwningPtr<mcld::DiagnosticLineInfo>
1497 diag_line_info(TheTarget->createDiagnosticLineInfo(*TheTarget,
1498 TheTriple.getTriple()));
1499
1500 mcld::getDiagnosticEngine().setLineInfo(*diag_line_info.take());
1501
1502 // Figure out where we are going to send the output...
1503 OwningPtr<mcld::ToolOutputFile>
1504 Out(GetOutputStream(TheTarget->get()->getName(),
1505 TheTriple.getOS(),
1506 ArgFileType,
1507 ArgBitcodeFilename,
1508 ArgOutputFilename));
1509 if (!Out) {
1510 // FIXME: show some error message pls.
1511 return 1;
1512 }
1513
1514 // Build up all of the passes that we want to do to the module.
1515 PassManager PM;
1516
1517 // Add the data layout from the target machine, if it exists, or the module.
1518 if (const DataLayout *DL = TheTargetMachine.getTM().getDataLayout())
1519 PM.add(new DataLayout(*DL));
1520 else
1521 PM.add(new DataLayout(&mod));
1522
1523 // Override default to generate verbose assembly.
1524 TheTargetMachine.getTM().setAsmVerbosityDefault(true);
1525
1526 {
1527 // Ask the target to add backend passes as necessary.
1528 if( TheTargetMachine.addPassesToEmitFile(PM,
1529 *Out,
1530 ArgFileType,
1531 OLvl,
1532 LDIRModule,
1533 LDConfig,
1534 NoVerify)) {
1535 errs() << argv[0] << ": target does not support generation of this"
1536 << " file type!\n";
1537 return 1;
1538 }
1539
1540 // Before executing passes, print the final values of the LLVM options.
1541 cl::PrintOptionValues();
1542
1543 PM.run(mod);
1544 }
1545
1546 if (mcld::getDiagnosticEngine().getPrinter()->getNumErrors())
1547 return 1;
1548
1549 // Declare success.
1550 Out->keep();
1551 return 0;
1552 }
1553