1 //===-- MObjectFileInfo.cpp - Object File Information ---------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCObjectFileInfo.h"
11 #include "llvm/ADT/StringExtras.h"
12 #include "llvm/ADT/Triple.h"
13 #include "llvm/MC/MCAsmInfo.h"
14 #include "llvm/MC/MCContext.h"
15 #include "llvm/MC/MCSection.h"
16 #include "llvm/MC/MCSectionCOFF.h"
17 #include "llvm/MC/MCSectionELF.h"
18 #include "llvm/MC/MCSectionMachO.h"
21 static bool useCompactUnwind(const Triple &T) {
26 // aarch64 always has it.
27 if (T.getArch() == Triple::aarch64)
30 // Use it on newer version of OS X.
31 if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
34 // And the iOS simulator.
36 (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86))
42 void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
44 SupportsWeakOmittedEHFrame = false;
46 if (T.isOSDarwin() && T.getArch() == Triple::aarch64)
47 SupportsCompactUnwindWithoutEHFrame = true;
49 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
50 | dwarf::DW_EH_PE_sdata4;
51 LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
52 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
53 dwarf::DW_EH_PE_sdata4;
55 // .comm doesn't support alignment before Leopard.
56 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
57 CommDirectiveSupportsAlignment = false;
60 = Ctx->getMachOSection("__TEXT", "__text",
61 MachO::S_ATTR_PURE_INSTRUCTIONS,
62 SectionKind::getText());
64 = Ctx->getMachOSection("__DATA", "__data", 0,
65 SectionKind::getDataRel());
67 // BSSSection might not be expected initialized on msvc.
70 TLSDataSection // .tdata
71 = Ctx->getMachOSection("__DATA", "__thread_data",
72 MachO::S_THREAD_LOCAL_REGULAR,
73 SectionKind::getDataRel());
74 TLSBSSSection // .tbss
75 = Ctx->getMachOSection("__DATA", "__thread_bss",
76 MachO::S_THREAD_LOCAL_ZEROFILL,
77 SectionKind::getThreadBSS());
79 // TODO: Verify datarel below.
81 = Ctx->getMachOSection("__DATA", "__thread_vars",
82 MachO::S_THREAD_LOCAL_VARIABLES,
83 SectionKind::getDataRel());
86 = Ctx->getMachOSection("__DATA", "__thread_init",
87 MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
88 SectionKind::getDataRel());
90 CStringSection // .cstring
91 = Ctx->getMachOSection("__TEXT", "__cstring",
92 MachO::S_CSTRING_LITERALS,
93 SectionKind::getMergeable1ByteCString());
95 = Ctx->getMachOSection("__TEXT","__ustring", 0,
96 SectionKind::getMergeable2ByteCString());
97 FourByteConstantSection // .literal4
98 = Ctx->getMachOSection("__TEXT", "__literal4",
99 MachO::S_4BYTE_LITERALS,
100 SectionKind::getMergeableConst4());
101 EightByteConstantSection // .literal8
102 = Ctx->getMachOSection("__TEXT", "__literal8",
103 MachO::S_8BYTE_LITERALS,
104 SectionKind::getMergeableConst8());
106 SixteenByteConstantSection // .literal16
107 = Ctx->getMachOSection("__TEXT", "__literal16",
108 MachO::S_16BYTE_LITERALS,
109 SectionKind::getMergeableConst16());
111 ReadOnlySection // .const
112 = Ctx->getMachOSection("__TEXT", "__const", 0,
113 SectionKind::getReadOnly());
116 = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
118 MachO::S_ATTR_PURE_INSTRUCTIONS,
119 SectionKind::getText());
121 = Ctx->getMachOSection("__TEXT", "__const_coal",
123 SectionKind::getReadOnly());
124 ConstDataSection // .const_data
125 = Ctx->getMachOSection("__DATA", "__const", 0,
126 SectionKind::getReadOnlyWithRel());
128 = Ctx->getMachOSection("__DATA","__datacoal_nt",
130 SectionKind::getDataRel());
132 = Ctx->getMachOSection("__DATA","__common",
134 SectionKind::getBSS());
136 = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL,
137 SectionKind::getBSS());
140 LazySymbolPointerSection
141 = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
142 MachO::S_LAZY_SYMBOL_POINTERS,
143 SectionKind::getMetadata());
144 NonLazySymbolPointerSection
145 = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
146 MachO::S_NON_LAZY_SYMBOL_POINTERS,
147 SectionKind::getMetadata());
149 if (RelocM == Reloc::Static) {
151 = Ctx->getMachOSection("__TEXT", "__constructor", 0,
152 SectionKind::getDataRel());
154 = Ctx->getMachOSection("__TEXT", "__destructor", 0,
155 SectionKind::getDataRel());
158 = Ctx->getMachOSection("__DATA", "__mod_init_func",
159 MachO::S_MOD_INIT_FUNC_POINTERS,
160 SectionKind::getDataRel());
162 = Ctx->getMachOSection("__DATA", "__mod_term_func",
163 MachO::S_MOD_TERM_FUNC_POINTERS,
164 SectionKind::getDataRel());
167 // Exception Handling.
168 LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
169 SectionKind::getReadOnlyWithRel());
171 COFFDebugSymbolsSection = nullptr;
173 if (useCompactUnwind(T)) {
174 CompactUnwindSection =
175 Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG,
176 SectionKind::getReadOnly());
178 if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
179 CompactUnwindDwarfEHFrameOnly = 0x04000000;
180 else if (T.getArch() == Triple::aarch64)
181 CompactUnwindDwarfEHFrameOnly = 0x03000000;
184 // Debug Information.
185 DwarfAccelNamesSection =
186 Ctx->getMachOSection("__DWARF", "__apple_names",
188 SectionKind::getMetadata());
189 DwarfAccelObjCSection =
190 Ctx->getMachOSection("__DWARF", "__apple_objc",
192 SectionKind::getMetadata());
193 // 16 character section limit...
194 DwarfAccelNamespaceSection =
195 Ctx->getMachOSection("__DWARF", "__apple_namespac",
197 SectionKind::getMetadata());
198 DwarfAccelTypesSection =
199 Ctx->getMachOSection("__DWARF", "__apple_types",
201 SectionKind::getMetadata());
204 Ctx->getMachOSection("__DWARF", "__debug_abbrev",
206 SectionKind::getMetadata());
208 Ctx->getMachOSection("__DWARF", "__debug_info",
210 SectionKind::getMetadata());
212 Ctx->getMachOSection("__DWARF", "__debug_line",
214 SectionKind::getMetadata());
216 Ctx->getMachOSection("__DWARF", "__debug_frame",
218 SectionKind::getMetadata());
219 DwarfPubNamesSection =
220 Ctx->getMachOSection("__DWARF", "__debug_pubnames",
222 SectionKind::getMetadata());
223 DwarfPubTypesSection =
224 Ctx->getMachOSection("__DWARF", "__debug_pubtypes",
226 SectionKind::getMetadata());
227 DwarfGnuPubNamesSection =
228 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn",
230 SectionKind::getMetadata());
231 DwarfGnuPubTypesSection =
232 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt",
234 SectionKind::getMetadata());
236 Ctx->getMachOSection("__DWARF", "__debug_str",
238 SectionKind::getMetadata());
240 Ctx->getMachOSection("__DWARF", "__debug_loc",
242 SectionKind::getMetadata());
243 DwarfARangesSection =
244 Ctx->getMachOSection("__DWARF", "__debug_aranges",
246 SectionKind::getMetadata());
248 Ctx->getMachOSection("__DWARF", "__debug_ranges",
250 SectionKind::getMetadata());
251 DwarfMacroInfoSection =
252 Ctx->getMachOSection("__DWARF", "__debug_macinfo",
254 SectionKind::getMetadata());
255 DwarfDebugInlineSection =
256 Ctx->getMachOSection("__DWARF", "__debug_inlined",
258 SectionKind::getMetadata());
260 Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps", 0,
261 SectionKind::getMetadata());
263 TLSExtraDataSection = TLSTLVSection;
266 void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
267 switch (T.getArch()) {
270 FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
273 case Triple::mips64el:
274 FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
277 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
281 switch (T.getArch()) {
285 case Triple::thumbeb:
286 if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)
288 // Fallthrough if not using EHABI
291 PersonalityEncoding = (RelocM == Reloc::PIC_)
292 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
293 : dwarf::DW_EH_PE_absptr;
294 LSDAEncoding = (RelocM == Reloc::PIC_)
295 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
296 : dwarf::DW_EH_PE_absptr;
297 TTypeEncoding = (RelocM == Reloc::PIC_)
298 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
299 : dwarf::DW_EH_PE_absptr;
302 if (RelocM == Reloc::PIC_) {
303 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
304 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
305 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
306 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
307 (CMModel == CodeModel::Small
308 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
309 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
310 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
311 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
313 PersonalityEncoding =
314 (CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
315 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
316 LSDAEncoding = (CMModel == CodeModel::Small)
317 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
318 TTypeEncoding = (CMModel == CodeModel::Small)
319 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
322 case Triple::aarch64:
323 case Triple::aarch64_be:
324 // The small model guarantees static code/data size < 4GB, but not where it
325 // will be in memory. Most of these could end up >2GB away so even a signed
326 // pc-relative 32-bit address is insufficient, theoretically.
327 if (RelocM == Reloc::PIC_) {
328 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
329 dwarf::DW_EH_PE_sdata8;
330 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
331 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
332 dwarf::DW_EH_PE_sdata8;
334 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
335 LSDAEncoding = dwarf::DW_EH_PE_absptr;
336 TTypeEncoding = dwarf::DW_EH_PE_absptr;
342 case Triple::mips64el:
343 // MIPS uses indirect pointer to refer personality functions, so that the
344 // eh_frame section can be read-only. DW.ref.personality will be generated
346 PersonalityEncoding = dwarf::DW_EH_PE_indirect;
349 case Triple::ppc64le:
350 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
351 dwarf::DW_EH_PE_udata8;
352 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
353 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
354 dwarf::DW_EH_PE_udata8;
357 if (RelocM == Reloc::PIC_) {
358 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
359 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
360 dwarf::DW_EH_PE_sdata4;
361 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
362 dwarf::DW_EH_PE_sdata4;
364 LSDAEncoding = dwarf::DW_EH_PE_absptr;
365 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
366 TTypeEncoding = dwarf::DW_EH_PE_absptr;
369 case Triple::sparcv9:
370 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
371 if (RelocM == Reloc::PIC_) {
372 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
373 dwarf::DW_EH_PE_sdata4;
374 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
375 dwarf::DW_EH_PE_sdata4;
377 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
378 TTypeEncoding = dwarf::DW_EH_PE_absptr;
381 case Triple::systemz:
382 // All currently-defined code models guarantee that 4-byte PC-relative
383 // values will be in range.
384 if (RelocM == Reloc::PIC_) {
385 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
386 dwarf::DW_EH_PE_sdata4;
387 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
388 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
389 dwarf::DW_EH_PE_sdata4;
391 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
392 LSDAEncoding = dwarf::DW_EH_PE_absptr;
393 TTypeEncoding = dwarf::DW_EH_PE_absptr;
400 // Solaris requires different flags for .eh_frame to seemingly every other
402 EHSectionType = ELF::SHT_PROGBITS;
403 EHSectionFlags = ELF::SHF_ALLOC;
404 if (T.isOSSolaris()) {
405 if (T.getArch() == Triple::x86_64)
406 EHSectionType = ELF::SHT_X86_64_UNWIND;
408 EHSectionFlags |= ELF::SHF_WRITE;
414 Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
415 ELF::SHF_WRITE | ELF::SHF_ALLOC,
416 SectionKind::getBSS());
419 Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
422 SectionKind::getText());
425 Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
426 ELF::SHF_WRITE |ELF::SHF_ALLOC,
427 SectionKind::getDataRel());
430 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
432 SectionKind::getReadOnly());
435 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
436 ELF::SHF_ALLOC | ELF::SHF_TLS |
438 SectionKind::getThreadData());
441 Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
442 ELF::SHF_ALLOC | ELF::SHF_TLS |
444 SectionKind::getThreadBSS());
447 Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
448 ELF::SHF_ALLOC |ELF::SHF_WRITE,
449 SectionKind::getDataRel());
451 DataRelLocalSection =
452 Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
453 ELF::SHF_ALLOC |ELF::SHF_WRITE,
454 SectionKind::getDataRelLocal());
457 Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
458 ELF::SHF_ALLOC |ELF::SHF_WRITE,
459 SectionKind::getReadOnlyWithRel());
461 DataRelROLocalSection =
462 Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
463 ELF::SHF_ALLOC |ELF::SHF_WRITE,
464 SectionKind::getReadOnlyWithRelLocal());
466 MergeableConst4Section =
467 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
468 ELF::SHF_ALLOC |ELF::SHF_MERGE,
469 SectionKind::getMergeableConst4());
471 MergeableConst8Section =
472 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
473 ELF::SHF_ALLOC |ELF::SHF_MERGE,
474 SectionKind::getMergeableConst8());
476 MergeableConst16Section =
477 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
478 ELF::SHF_ALLOC |ELF::SHF_MERGE,
479 SectionKind::getMergeableConst16());
482 Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
483 ELF::SHF_ALLOC |ELF::SHF_WRITE,
484 SectionKind::getDataRel());
487 Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
488 ELF::SHF_ALLOC |ELF::SHF_WRITE,
489 SectionKind::getDataRel());
491 // Exception Handling Sections.
493 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
494 // it contains relocatable pointers. In PIC mode, this is probably a big
495 // runtime hit for C++ apps. Either the contents of the LSDA need to be
496 // adjusted or this should be a data section.
498 Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
500 SectionKind::getReadOnly());
502 COFFDebugSymbolsSection = nullptr;
504 // Debug Info Sections.
506 Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
507 SectionKind::getMetadata());
509 Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0,
510 SectionKind::getMetadata());
512 Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0,
513 SectionKind::getMetadata());
515 Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0,
516 SectionKind::getMetadata());
517 DwarfPubNamesSection =
518 Ctx->getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0,
519 SectionKind::getMetadata());
520 DwarfPubTypesSection =
521 Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0,
522 SectionKind::getMetadata());
523 DwarfGnuPubNamesSection =
524 Ctx->getELFSection(".debug_gnu_pubnames", ELF::SHT_PROGBITS, 0,
525 SectionKind::getMetadata());
526 DwarfGnuPubTypesSection =
527 Ctx->getELFSection(".debug_gnu_pubtypes", ELF::SHT_PROGBITS, 0,
528 SectionKind::getMetadata());
530 Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
531 ELF::SHF_MERGE | ELF::SHF_STRINGS,
532 SectionKind::getMergeable1ByteCString());
534 Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
535 SectionKind::getMetadata());
536 DwarfARangesSection =
537 Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0,
538 SectionKind::getMetadata());
540 Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0,
541 SectionKind::getMetadata());
542 DwarfMacroInfoSection =
543 Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0,
544 SectionKind::getMetadata());
546 // DWARF5 Experimental Debug Info
548 // Accelerator Tables
549 DwarfAccelNamesSection =
550 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0,
551 SectionKind::getMetadata());
552 DwarfAccelObjCSection =
553 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0,
554 SectionKind::getMetadata());
555 DwarfAccelNamespaceSection =
556 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0,
557 SectionKind::getMetadata());
558 DwarfAccelTypesSection =
559 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0,
560 SectionKind::getMetadata());
563 DwarfInfoDWOSection =
564 Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0,
565 SectionKind::getMetadata());
566 DwarfTypesDWOSection =
567 Ctx->getELFSection(".debug_types.dwo", ELF::SHT_PROGBITS, 0,
568 SectionKind::getMetadata());
569 DwarfAbbrevDWOSection =
570 Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0,
571 SectionKind::getMetadata());
573 Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
574 ELF::SHF_MERGE | ELF::SHF_STRINGS,
575 SectionKind::getMergeable1ByteCString());
576 DwarfLineDWOSection =
577 Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0,
578 SectionKind::getMetadata());
580 Ctx->getELFSection(".debug_loc.dwo", ELF::SHT_PROGBITS, 0,
581 SectionKind::getMetadata());
582 DwarfStrOffDWOSection =
583 Ctx->getELFSection(".debug_str_offsets.dwo", ELF::SHT_PROGBITS, 0,
584 SectionKind::getMetadata());
586 Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0,
587 SectionKind::getMetadata());
590 Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS,
592 SectionKind::getMetadata());
597 void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
598 bool IsWoA = T.getArch() == Triple::arm || T.getArch() == Triple::thumb;
600 CommDirectiveSupportsAlignment = true;
604 Ctx->getCOFFSection(".bss",
605 COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
606 COFF::IMAGE_SCN_MEM_READ |
607 COFF::IMAGE_SCN_MEM_WRITE,
608 SectionKind::getBSS());
610 Ctx->getCOFFSection(".text",
611 (IsWoA ? COFF::IMAGE_SCN_MEM_16BIT
612 : (COFF::SectionCharacteristics)0) |
613 COFF::IMAGE_SCN_CNT_CODE |
614 COFF::IMAGE_SCN_MEM_EXECUTE |
615 COFF::IMAGE_SCN_MEM_READ,
616 SectionKind::getText());
618 Ctx->getCOFFSection(".data",
619 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
620 COFF::IMAGE_SCN_MEM_READ |
621 COFF::IMAGE_SCN_MEM_WRITE,
622 SectionKind::getDataRel());
624 Ctx->getCOFFSection(".rdata",
625 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
626 COFF::IMAGE_SCN_MEM_READ,
627 SectionKind::getReadOnly());
629 if (T.isKnownWindowsMSVCEnvironment() || T.isWindowsItaniumEnvironment()) {
631 Ctx->getCOFFSection(".CRT$XCU",
632 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
633 COFF::IMAGE_SCN_MEM_READ,
634 SectionKind::getReadOnly());
636 Ctx->getCOFFSection(".CRT$XTX",
637 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
638 COFF::IMAGE_SCN_MEM_READ,
639 SectionKind::getReadOnly());
642 Ctx->getCOFFSection(".ctors",
643 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
644 COFF::IMAGE_SCN_MEM_READ |
645 COFF::IMAGE_SCN_MEM_WRITE,
646 SectionKind::getDataRel());
648 Ctx->getCOFFSection(".dtors",
649 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
650 COFF::IMAGE_SCN_MEM_READ |
651 COFF::IMAGE_SCN_MEM_WRITE,
652 SectionKind::getDataRel());
655 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
656 // though it contains relocatable pointers. In PIC mode, this is probably a
657 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
658 // adjusted or this should be a data section.
659 assert(T.isOSWindows() && "Windows is the only supported COFF target");
660 if (T.getArch() == Triple::x86_64) {
661 // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
664 LSDASection = Ctx->getCOFFSection(".gcc_except_table",
665 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
666 COFF::IMAGE_SCN_MEM_READ,
667 SectionKind::getReadOnly());
671 COFFDebugSymbolsSection =
672 Ctx->getCOFFSection(".debug$S",
673 COFF::IMAGE_SCN_MEM_DISCARDABLE |
674 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
675 COFF::IMAGE_SCN_MEM_READ,
676 SectionKind::getMetadata());
679 Ctx->getCOFFSection(".debug_abbrev",
680 COFF::IMAGE_SCN_MEM_DISCARDABLE |
681 COFF::IMAGE_SCN_MEM_READ,
682 SectionKind::getMetadata());
684 Ctx->getCOFFSection(".debug_info",
685 COFF::IMAGE_SCN_MEM_DISCARDABLE |
686 COFF::IMAGE_SCN_MEM_READ,
687 SectionKind::getMetadata());
689 Ctx->getCOFFSection(".debug_line",
690 COFF::IMAGE_SCN_MEM_DISCARDABLE |
691 COFF::IMAGE_SCN_MEM_READ,
692 SectionKind::getMetadata());
694 Ctx->getCOFFSection(".debug_frame",
695 COFF::IMAGE_SCN_MEM_DISCARDABLE |
696 COFF::IMAGE_SCN_MEM_READ,
697 SectionKind::getMetadata());
698 DwarfPubNamesSection =
699 Ctx->getCOFFSection(".debug_pubnames",
700 COFF::IMAGE_SCN_MEM_DISCARDABLE |
701 COFF::IMAGE_SCN_MEM_READ,
702 SectionKind::getMetadata());
703 DwarfPubTypesSection =
704 Ctx->getCOFFSection(".debug_pubtypes",
705 COFF::IMAGE_SCN_MEM_DISCARDABLE |
706 COFF::IMAGE_SCN_MEM_READ,
707 SectionKind::getMetadata());
708 DwarfGnuPubNamesSection =
709 Ctx->getCOFFSection(".debug_gnu_pubnames",
710 COFF::IMAGE_SCN_MEM_DISCARDABLE |
711 COFF::IMAGE_SCN_MEM_READ,
712 SectionKind::getMetadata());
713 DwarfGnuPubTypesSection =
714 Ctx->getCOFFSection(".debug_gnu_pubtypes",
715 COFF::IMAGE_SCN_MEM_DISCARDABLE |
716 COFF::IMAGE_SCN_MEM_READ,
717 SectionKind::getMetadata());
719 Ctx->getCOFFSection(".debug_str",
720 COFF::IMAGE_SCN_MEM_DISCARDABLE |
721 COFF::IMAGE_SCN_MEM_READ,
722 SectionKind::getMetadata());
724 Ctx->getCOFFSection(".debug_loc",
725 COFF::IMAGE_SCN_MEM_DISCARDABLE |
726 COFF::IMAGE_SCN_MEM_READ,
727 SectionKind::getMetadata());
728 DwarfARangesSection =
729 Ctx->getCOFFSection(".debug_aranges",
730 COFF::IMAGE_SCN_MEM_DISCARDABLE |
731 COFF::IMAGE_SCN_MEM_READ,
732 SectionKind::getMetadata());
734 Ctx->getCOFFSection(".debug_ranges",
735 COFF::IMAGE_SCN_MEM_DISCARDABLE |
736 COFF::IMAGE_SCN_MEM_READ,
737 SectionKind::getMetadata());
738 DwarfMacroInfoSection =
739 Ctx->getCOFFSection(".debug_macinfo",
740 COFF::IMAGE_SCN_MEM_DISCARDABLE |
741 COFF::IMAGE_SCN_MEM_READ,
742 SectionKind::getMetadata());
743 DwarfInfoDWOSection =
744 Ctx->getCOFFSection(".debug_info.dwo",
745 COFF::IMAGE_SCN_MEM_DISCARDABLE |
746 COFF::IMAGE_SCN_MEM_READ,
747 SectionKind::getMetadata());
748 DwarfTypesDWOSection =
749 Ctx->getCOFFSection(".debug_types.dwo", COFF::IMAGE_SCN_MEM_DISCARDABLE |
750 COFF::IMAGE_SCN_MEM_READ,
751 SectionKind::getMetadata());
752 DwarfAbbrevDWOSection =
753 Ctx->getCOFFSection(".debug_abbrev.dwo",
754 COFF::IMAGE_SCN_MEM_DISCARDABLE |
755 COFF::IMAGE_SCN_MEM_READ,
756 SectionKind::getMetadata());
758 Ctx->getCOFFSection(".debug_str.dwo",
759 COFF::IMAGE_SCN_MEM_DISCARDABLE |
760 COFF::IMAGE_SCN_MEM_READ,
761 SectionKind::getMetadata());
762 DwarfLineDWOSection =
763 Ctx->getCOFFSection(".debug_line.dwo",
764 COFF::IMAGE_SCN_MEM_DISCARDABLE |
765 COFF::IMAGE_SCN_MEM_READ,
766 SectionKind::getMetadata());
768 Ctx->getCOFFSection(".debug_loc.dwo",
769 COFF::IMAGE_SCN_MEM_DISCARDABLE |
770 COFF::IMAGE_SCN_MEM_READ,
771 SectionKind::getMetadata());
772 DwarfStrOffDWOSection =
773 Ctx->getCOFFSection(".debug_str_offsets.dwo",
774 COFF::IMAGE_SCN_MEM_DISCARDABLE |
775 COFF::IMAGE_SCN_MEM_READ,
776 SectionKind::getMetadata());
779 Ctx->getCOFFSection(".debug_addr",
780 COFF::IMAGE_SCN_MEM_DISCARDABLE |
781 COFF::IMAGE_SCN_MEM_READ,
782 SectionKind::getMetadata());
784 DwarfAccelNamesSection =
785 Ctx->getCOFFSection(".apple_names",
786 COFF::IMAGE_SCN_MEM_DISCARDABLE |
787 COFF::IMAGE_SCN_MEM_READ,
788 SectionKind::getMetadata());
789 DwarfAccelNamespaceSection =
790 Ctx->getCOFFSection(".apple_namespaces",
791 COFF::IMAGE_SCN_MEM_DISCARDABLE |
792 COFF::IMAGE_SCN_MEM_READ,
793 SectionKind::getMetadata());
794 DwarfAccelTypesSection =
795 Ctx->getCOFFSection(".apple_types",
796 COFF::IMAGE_SCN_MEM_DISCARDABLE |
797 COFF::IMAGE_SCN_MEM_READ,
798 SectionKind::getMetadata());
799 DwarfAccelObjCSection =
800 Ctx->getCOFFSection(".apple_objc",
801 COFF::IMAGE_SCN_MEM_DISCARDABLE |
802 COFF::IMAGE_SCN_MEM_READ,
803 SectionKind::getMetadata());
806 Ctx->getCOFFSection(".drectve",
807 COFF::IMAGE_SCN_LNK_INFO |
808 COFF::IMAGE_SCN_LNK_REMOVE,
809 SectionKind::getMetadata());
812 Ctx->getCOFFSection(".pdata",
813 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
814 COFF::IMAGE_SCN_MEM_READ,
815 SectionKind::getDataRel());
818 Ctx->getCOFFSection(".xdata",
819 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
820 COFF::IMAGE_SCN_MEM_READ,
821 SectionKind::getDataRel());
824 Ctx->getCOFFSection(".tls$",
825 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
826 COFF::IMAGE_SCN_MEM_READ |
827 COFF::IMAGE_SCN_MEM_WRITE,
828 SectionKind::getDataRel());
831 void MCObjectFileInfo::InitMCObjectFileInfo(StringRef T, Reloc::Model relocm,
839 CommDirectiveSupportsAlignment = true;
840 SupportsWeakOmittedEHFrame = true;
841 SupportsCompactUnwindWithoutEHFrame = false;
843 PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =
844 dwarf::DW_EH_PE_absptr;
846 CompactUnwindDwarfEHFrameOnly = 0;
848 EHFrameSection = nullptr; // Created on demand.
849 CompactUnwindSection = nullptr; // Used only by selected targets.
850 DwarfAccelNamesSection = nullptr; // Used only by selected targets.
851 DwarfAccelObjCSection = nullptr; // Used only by selected targets.
852 DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
853 DwarfAccelTypesSection = nullptr; // Used only by selected targets.
857 Triple::ArchType Arch = TT.getArch();
858 // FIXME: Checking for Arch here to filter out bogus triples such as
859 // cellspu-apple-darwin. Perhaps we should fix in Triple?
860 if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
861 Arch == Triple::arm || Arch == Triple::thumb ||
862 Arch == Triple::aarch64 ||
863 Arch == Triple::ppc || Arch == Triple::ppc64 ||
864 Arch == Triple::UnknownArch) &&
865 (TT.isOSDarwin() || TT.isOSBinFormatMachO())) {
867 InitMachOMCObjectFileInfo(TT);
868 } else if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
869 Arch == Triple::arm || Arch == Triple::thumb) &&
870 (TT.isOSWindows() && TT.getObjectFormat() == Triple::COFF)) {
872 InitCOFFMCObjectFileInfo(TT);
875 InitELFMCObjectFileInfo(TT);
879 const MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
880 return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
881 SectionKind::getMetadata(), 0, utostr(Hash));
884 void MCObjectFileInfo::InitEHFrameSection() {
887 Ctx->getMachOSection("__TEXT", "__eh_frame",
889 MachO::S_ATTR_NO_TOC |
890 MachO::S_ATTR_STRIP_STATIC_SYMS |
891 MachO::S_ATTR_LIVE_SUPPORT,
892 SectionKind::getReadOnly());
893 else if (Env == IsELF)
895 Ctx->getELFSection(".eh_frame", EHSectionType,
897 SectionKind::getDataRel());
900 Ctx->getCOFFSection(".eh_frame",
901 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
902 COFF::IMAGE_SCN_MEM_READ |
903 COFF::IMAGE_SCN_MEM_WRITE,
904 SectionKind::getDataRel());