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 |
278 ((CMModel == CodeModel::Large) ? dwarf::DW_EH_PE_sdata8
279 : dwarf::DW_EH_PE_sdata4);
283 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
287 switch (T.getArch()) {
291 case Triple::thumbeb:
292 if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)
294 // Fallthrough if not using EHABI
297 PersonalityEncoding = (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;
300 LSDAEncoding = (RelocM == Reloc::PIC_)
301 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
302 : dwarf::DW_EH_PE_absptr;
303 TTypeEncoding = (RelocM == Reloc::PIC_)
304 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
305 : dwarf::DW_EH_PE_absptr;
308 if (RelocM == Reloc::PIC_) {
309 PersonalityEncoding = 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);
312 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
313 (CMModel == CodeModel::Small
314 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
315 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
316 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
317 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
319 PersonalityEncoding =
320 (CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
321 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
322 LSDAEncoding = (CMModel == CodeModel::Small)
323 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
324 TTypeEncoding = (CMModel == CodeModel::Small)
325 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
328 case Triple::aarch64:
329 case Triple::aarch64_be:
330 // The small model guarantees static code/data size < 4GB, but not where it
331 // will be in memory. Most of these could end up >2GB away so even a signed
332 // pc-relative 32-bit address is insufficient, theoretically.
333 if (RelocM == Reloc::PIC_) {
334 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
335 dwarf::DW_EH_PE_sdata8;
336 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
337 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
338 dwarf::DW_EH_PE_sdata8;
340 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
341 LSDAEncoding = dwarf::DW_EH_PE_absptr;
342 TTypeEncoding = dwarf::DW_EH_PE_absptr;
348 case Triple::mips64el:
349 // MIPS uses indirect pointer to refer personality functions, so that the
350 // eh_frame section can be read-only. DW.ref.personality will be generated
352 PersonalityEncoding = dwarf::DW_EH_PE_indirect;
355 case Triple::ppc64le:
356 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
357 dwarf::DW_EH_PE_udata8;
358 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
359 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
360 dwarf::DW_EH_PE_udata8;
363 if (RelocM == Reloc::PIC_) {
364 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
365 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
366 dwarf::DW_EH_PE_sdata4;
367 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
368 dwarf::DW_EH_PE_sdata4;
370 LSDAEncoding = dwarf::DW_EH_PE_absptr;
371 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
372 TTypeEncoding = dwarf::DW_EH_PE_absptr;
375 case Triple::sparcv9:
376 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
377 if (RelocM == Reloc::PIC_) {
378 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
379 dwarf::DW_EH_PE_sdata4;
380 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
381 dwarf::DW_EH_PE_sdata4;
383 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
384 TTypeEncoding = dwarf::DW_EH_PE_absptr;
387 case Triple::systemz:
388 // All currently-defined code models guarantee that 4-byte PC-relative
389 // values will be in range.
390 if (RelocM == Reloc::PIC_) {
391 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
392 dwarf::DW_EH_PE_sdata4;
393 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
394 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
395 dwarf::DW_EH_PE_sdata4;
397 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
398 LSDAEncoding = dwarf::DW_EH_PE_absptr;
399 TTypeEncoding = dwarf::DW_EH_PE_absptr;
406 // Solaris requires different flags for .eh_frame to seemingly every other
408 EHSectionType = ELF::SHT_PROGBITS;
409 EHSectionFlags = ELF::SHF_ALLOC;
410 if (T.isOSSolaris()) {
411 if (T.getArch() == Triple::x86_64)
412 EHSectionType = ELF::SHT_X86_64_UNWIND;
414 EHSectionFlags |= ELF::SHF_WRITE;
419 BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
420 ELF::SHF_WRITE | ELF::SHF_ALLOC);
422 TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
423 ELF::SHF_EXECINSTR | ELF::SHF_ALLOC);
425 DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
426 ELF::SHF_WRITE | ELF::SHF_ALLOC);
429 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
432 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
433 ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
435 TLSBSSSection = Ctx->getELFSection(
436 ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
438 DataRelSection = Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
439 ELF::SHF_ALLOC | ELF::SHF_WRITE);
441 DataRelLocalSection = Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
442 ELF::SHF_ALLOC | ELF::SHF_WRITE);
444 DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
445 ELF::SHF_ALLOC | ELF::SHF_WRITE);
447 DataRelROLocalSection = Ctx->getELFSection(
448 ".data.rel.ro.local", ELF::SHT_PROGBITS, ELF::SHF_ALLOC | ELF::SHF_WRITE);
450 MergeableConst4Section =
451 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
452 ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");
454 MergeableConst8Section =
455 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
456 ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, "");
458 MergeableConst16Section =
459 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
460 ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, "");
462 StaticCtorSection = Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
463 ELF::SHF_ALLOC | ELF::SHF_WRITE);
465 StaticDtorSection = Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
466 ELF::SHF_ALLOC | ELF::SHF_WRITE);
468 // Exception Handling Sections.
470 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
471 // it contains relocatable pointers. In PIC mode, this is probably a big
472 // runtime hit for C++ apps. Either the contents of the LSDA need to be
473 // adjusted or this should be a data section.
474 LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
477 COFFDebugSymbolsSection = nullptr;
479 // Debug Info Sections.
481 Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0);
482 DwarfInfoSection = Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0);
483 DwarfLineSection = Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0);
484 DwarfFrameSection = Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0);
485 DwarfPubNamesSection =
486 Ctx->getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0);
487 DwarfPubTypesSection =
488 Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0);
489 DwarfGnuPubNamesSection =
490 Ctx->getELFSection(".debug_gnu_pubnames", ELF::SHT_PROGBITS, 0);
491 DwarfGnuPubTypesSection =
492 Ctx->getELFSection(".debug_gnu_pubtypes", ELF::SHT_PROGBITS, 0);
494 Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
495 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
496 DwarfLocSection = Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0);
497 DwarfARangesSection =
498 Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0);
500 Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0);
501 DwarfMacroInfoSection =
502 Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0);
504 // DWARF5 Experimental Debug Info
506 // Accelerator Tables
507 DwarfAccelNamesSection =
508 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0);
509 DwarfAccelObjCSection =
510 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0);
511 DwarfAccelNamespaceSection =
512 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0);
513 DwarfAccelTypesSection =
514 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0);
517 DwarfInfoDWOSection =
518 Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0);
519 DwarfTypesDWOSection =
520 Ctx->getELFSection(".debug_types.dwo", ELF::SHT_PROGBITS, 0);
521 DwarfAbbrevDWOSection =
522 Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0);
524 Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
525 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
526 DwarfLineDWOSection =
527 Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0);
529 Ctx->getELFSection(".debug_loc.dwo", ELF::SHT_PROGBITS, 0);
530 DwarfStrOffDWOSection =
531 Ctx->getELFSection(".debug_str_offsets.dwo", ELF::SHT_PROGBITS, 0);
532 DwarfAddrSection = Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0);
535 Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
539 void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
540 bool IsWoA = T.getArch() == Triple::arm || T.getArch() == Triple::thumb;
542 CommDirectiveSupportsAlignment = true;
546 Ctx->getCOFFSection(".bss",
547 COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
548 COFF::IMAGE_SCN_MEM_READ |
549 COFF::IMAGE_SCN_MEM_WRITE,
550 SectionKind::getBSS());
552 Ctx->getCOFFSection(".text",
553 (IsWoA ? COFF::IMAGE_SCN_MEM_16BIT
554 : (COFF::SectionCharacteristics)0) |
555 COFF::IMAGE_SCN_CNT_CODE |
556 COFF::IMAGE_SCN_MEM_EXECUTE |
557 COFF::IMAGE_SCN_MEM_READ,
558 SectionKind::getText());
560 Ctx->getCOFFSection(".data",
561 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
562 COFF::IMAGE_SCN_MEM_READ |
563 COFF::IMAGE_SCN_MEM_WRITE,
564 SectionKind::getDataRel());
566 Ctx->getCOFFSection(".rdata",
567 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
568 COFF::IMAGE_SCN_MEM_READ,
569 SectionKind::getReadOnly());
571 if (T.isKnownWindowsMSVCEnvironment() || T.isWindowsItaniumEnvironment()) {
573 Ctx->getCOFFSection(".CRT$XCU",
574 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
575 COFF::IMAGE_SCN_MEM_READ,
576 SectionKind::getReadOnly());
578 Ctx->getCOFFSection(".CRT$XTX",
579 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
580 COFF::IMAGE_SCN_MEM_READ,
581 SectionKind::getReadOnly());
584 Ctx->getCOFFSection(".ctors",
585 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
586 COFF::IMAGE_SCN_MEM_READ |
587 COFF::IMAGE_SCN_MEM_WRITE,
588 SectionKind::getDataRel());
590 Ctx->getCOFFSection(".dtors",
591 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
592 COFF::IMAGE_SCN_MEM_READ |
593 COFF::IMAGE_SCN_MEM_WRITE,
594 SectionKind::getDataRel());
597 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
598 // though it contains relocatable pointers. In PIC mode, this is probably a
599 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
600 // adjusted or this should be a data section.
601 assert(T.isOSWindows() && "Windows is the only supported COFF target");
602 if (T.getArch() == Triple::x86_64) {
603 // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
606 LSDASection = Ctx->getCOFFSection(".gcc_except_table",
607 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
608 COFF::IMAGE_SCN_MEM_READ,
609 SectionKind::getReadOnly());
613 COFFDebugSymbolsSection =
614 Ctx->getCOFFSection(".debug$S",
615 COFF::IMAGE_SCN_MEM_DISCARDABLE |
616 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
617 COFF::IMAGE_SCN_MEM_READ,
618 SectionKind::getMetadata());
621 Ctx->getCOFFSection(".debug_abbrev",
622 COFF::IMAGE_SCN_MEM_DISCARDABLE |
623 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
624 COFF::IMAGE_SCN_MEM_READ,
625 SectionKind::getMetadata());
627 Ctx->getCOFFSection(".debug_info",
628 COFF::IMAGE_SCN_MEM_DISCARDABLE |
629 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
630 COFF::IMAGE_SCN_MEM_READ,
631 SectionKind::getMetadata());
633 Ctx->getCOFFSection(".debug_line",
634 COFF::IMAGE_SCN_MEM_DISCARDABLE |
635 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
636 COFF::IMAGE_SCN_MEM_READ,
637 SectionKind::getMetadata());
639 Ctx->getCOFFSection(".debug_frame",
640 COFF::IMAGE_SCN_MEM_DISCARDABLE |
641 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
642 COFF::IMAGE_SCN_MEM_READ,
643 SectionKind::getMetadata());
644 DwarfPubNamesSection =
645 Ctx->getCOFFSection(".debug_pubnames",
646 COFF::IMAGE_SCN_MEM_DISCARDABLE |
647 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
648 COFF::IMAGE_SCN_MEM_READ,
649 SectionKind::getMetadata());
650 DwarfPubTypesSection =
651 Ctx->getCOFFSection(".debug_pubtypes",
652 COFF::IMAGE_SCN_MEM_DISCARDABLE |
653 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
654 COFF::IMAGE_SCN_MEM_READ,
655 SectionKind::getMetadata());
656 DwarfGnuPubNamesSection =
657 Ctx->getCOFFSection(".debug_gnu_pubnames",
658 COFF::IMAGE_SCN_MEM_DISCARDABLE |
659 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
660 COFF::IMAGE_SCN_MEM_READ,
661 SectionKind::getMetadata());
662 DwarfGnuPubTypesSection =
663 Ctx->getCOFFSection(".debug_gnu_pubtypes",
664 COFF::IMAGE_SCN_MEM_DISCARDABLE |
665 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
666 COFF::IMAGE_SCN_MEM_READ,
667 SectionKind::getMetadata());
669 Ctx->getCOFFSection(".debug_str",
670 COFF::IMAGE_SCN_MEM_DISCARDABLE |
671 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
672 COFF::IMAGE_SCN_MEM_READ,
673 SectionKind::getMetadata());
675 Ctx->getCOFFSection(".debug_loc",
676 COFF::IMAGE_SCN_MEM_DISCARDABLE |
677 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
678 COFF::IMAGE_SCN_MEM_READ,
679 SectionKind::getMetadata());
680 DwarfARangesSection =
681 Ctx->getCOFFSection(".debug_aranges",
682 COFF::IMAGE_SCN_MEM_DISCARDABLE |
683 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
684 COFF::IMAGE_SCN_MEM_READ,
685 SectionKind::getMetadata());
687 Ctx->getCOFFSection(".debug_ranges",
688 COFF::IMAGE_SCN_MEM_DISCARDABLE |
689 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
690 COFF::IMAGE_SCN_MEM_READ,
691 SectionKind::getMetadata());
692 DwarfMacroInfoSection =
693 Ctx->getCOFFSection(".debug_macinfo",
694 COFF::IMAGE_SCN_MEM_DISCARDABLE |
695 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
696 COFF::IMAGE_SCN_MEM_READ,
697 SectionKind::getMetadata());
698 DwarfInfoDWOSection =
699 Ctx->getCOFFSection(".debug_info.dwo",
700 COFF::IMAGE_SCN_MEM_DISCARDABLE |
701 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
702 COFF::IMAGE_SCN_MEM_READ,
703 SectionKind::getMetadata());
704 DwarfTypesDWOSection =
705 Ctx->getCOFFSection(".debug_types.dwo",
706 COFF::IMAGE_SCN_MEM_DISCARDABLE |
707 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
708 COFF::IMAGE_SCN_MEM_READ,
709 SectionKind::getMetadata());
710 DwarfAbbrevDWOSection =
711 Ctx->getCOFFSection(".debug_abbrev.dwo",
712 COFF::IMAGE_SCN_MEM_DISCARDABLE |
713 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
714 COFF::IMAGE_SCN_MEM_READ,
715 SectionKind::getMetadata());
717 Ctx->getCOFFSection(".debug_str.dwo",
718 COFF::IMAGE_SCN_MEM_DISCARDABLE |
719 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
720 COFF::IMAGE_SCN_MEM_READ,
721 SectionKind::getMetadata());
722 DwarfLineDWOSection =
723 Ctx->getCOFFSection(".debug_line.dwo",
724 COFF::IMAGE_SCN_MEM_DISCARDABLE |
725 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
726 COFF::IMAGE_SCN_MEM_READ,
727 SectionKind::getMetadata());
729 Ctx->getCOFFSection(".debug_loc.dwo",
730 COFF::IMAGE_SCN_MEM_DISCARDABLE |
731 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
732 COFF::IMAGE_SCN_MEM_READ,
733 SectionKind::getMetadata());
734 DwarfStrOffDWOSection =
735 Ctx->getCOFFSection(".debug_str_offsets.dwo",
736 COFF::IMAGE_SCN_MEM_DISCARDABLE |
737 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
738 COFF::IMAGE_SCN_MEM_READ,
739 SectionKind::getMetadata());
741 Ctx->getCOFFSection(".debug_addr",
742 COFF::IMAGE_SCN_MEM_DISCARDABLE |
743 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
744 COFF::IMAGE_SCN_MEM_READ,
745 SectionKind::getMetadata());
746 DwarfAccelNamesSection =
747 Ctx->getCOFFSection(".apple_names",
748 COFF::IMAGE_SCN_MEM_DISCARDABLE |
749 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
750 COFF::IMAGE_SCN_MEM_READ,
751 SectionKind::getMetadata());
752 DwarfAccelNamespaceSection =
753 Ctx->getCOFFSection(".apple_namespaces",
754 COFF::IMAGE_SCN_MEM_DISCARDABLE |
755 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
756 COFF::IMAGE_SCN_MEM_READ,
757 SectionKind::getMetadata());
758 DwarfAccelTypesSection =
759 Ctx->getCOFFSection(".apple_types",
760 COFF::IMAGE_SCN_MEM_DISCARDABLE |
761 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
762 COFF::IMAGE_SCN_MEM_READ,
763 SectionKind::getMetadata());
764 DwarfAccelObjCSection =
765 Ctx->getCOFFSection(".apple_objc",
766 COFF::IMAGE_SCN_MEM_DISCARDABLE |
767 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
768 COFF::IMAGE_SCN_MEM_READ,
769 SectionKind::getMetadata());
772 Ctx->getCOFFSection(".drectve",
773 COFF::IMAGE_SCN_LNK_INFO |
774 COFF::IMAGE_SCN_LNK_REMOVE,
775 SectionKind::getMetadata());
778 Ctx->getCOFFSection(".pdata",
779 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
780 COFF::IMAGE_SCN_MEM_READ,
781 SectionKind::getDataRel());
784 Ctx->getCOFFSection(".xdata",
785 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
786 COFF::IMAGE_SCN_MEM_READ,
787 SectionKind::getDataRel());
790 Ctx->getCOFFSection(".tls$",
791 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
792 COFF::IMAGE_SCN_MEM_READ |
793 COFF::IMAGE_SCN_MEM_WRITE,
794 SectionKind::getDataRel());
797 void MCObjectFileInfo::InitMCObjectFileInfo(StringRef T, Reloc::Model relocm,
805 CommDirectiveSupportsAlignment = true;
806 SupportsWeakOmittedEHFrame = true;
807 SupportsCompactUnwindWithoutEHFrame = false;
809 PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =
810 dwarf::DW_EH_PE_absptr;
812 CompactUnwindDwarfEHFrameOnly = 0;
814 EHFrameSection = nullptr; // Created on demand.
815 CompactUnwindSection = nullptr; // Used only by selected targets.
816 DwarfAccelNamesSection = nullptr; // Used only by selected targets.
817 DwarfAccelObjCSection = nullptr; // Used only by selected targets.
818 DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
819 DwarfAccelTypesSection = nullptr; // Used only by selected targets.
823 Triple::ArchType Arch = TT.getArch();
824 // FIXME: Checking for Arch here to filter out bogus triples such as
825 // cellspu-apple-darwin. Perhaps we should fix in Triple?
826 if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
827 Arch == Triple::arm || Arch == Triple::thumb ||
828 Arch == Triple::aarch64 ||
829 Arch == Triple::ppc || Arch == Triple::ppc64 ||
830 Arch == Triple::UnknownArch) &&
831 (TT.isOSDarwin() || TT.isOSBinFormatMachO())) {
833 InitMachOMCObjectFileInfo(TT);
834 } else if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
835 Arch == Triple::arm || Arch == Triple::thumb) &&
836 (TT.isOSWindows() && TT.getObjectFormat() == Triple::COFF)) {
838 InitCOFFMCObjectFileInfo(TT);
841 InitELFMCObjectFileInfo(TT);
845 const MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
846 return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
850 void MCObjectFileInfo::InitEHFrameSection() {
853 Ctx->getMachOSection("__TEXT", "__eh_frame",
855 MachO::S_ATTR_NO_TOC |
856 MachO::S_ATTR_STRIP_STATIC_SYMS |
857 MachO::S_ATTR_LIVE_SUPPORT,
858 SectionKind::getReadOnly());
859 else if (Env == IsELF)
861 Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags);
864 Ctx->getCOFFSection(".eh_frame",
865 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
866 COFF::IMAGE_SCN_MEM_READ |
867 COFF::IMAGE_SCN_MEM_WRITE,
868 SectionKind::getDataRel());