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/MC/MCContext.h"
12 #include "llvm/MC/MCSection.h"
13 #include "llvm/MC/MCSectionCOFF.h"
14 #include "llvm/MC/MCSectionELF.h"
15 #include "llvm/MC/MCSectionMachO.h"
16 #include "llvm/ADT/Triple.h"
19 void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
21 IsFunctionEHFrameSymbolPrivate = false;
22 SupportsWeakOmittedEHFrame = false;
24 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
25 | dwarf::DW_EH_PE_sdata4;
26 LSDAEncoding = FDEEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
27 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
28 dwarf::DW_EH_PE_sdata4;
30 // .comm doesn't support alignment before Leopard.
31 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
32 CommDirectiveSupportsAlignment = false;
35 = Ctx->getMachOSection("__TEXT", "__text",
36 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
37 SectionKind::getText());
39 = Ctx->getMachOSection("__DATA", "__data", 0,
40 SectionKind::getDataRel());
42 TLSDataSection // .tdata
43 = Ctx->getMachOSection("__DATA", "__thread_data",
44 MCSectionMachO::S_THREAD_LOCAL_REGULAR,
45 SectionKind::getDataRel());
46 TLSBSSSection // .tbss
47 = Ctx->getMachOSection("__DATA", "__thread_bss",
48 MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
49 SectionKind::getThreadBSS());
51 // TODO: Verify datarel below.
53 = Ctx->getMachOSection("__DATA", "__thread_vars",
54 MCSectionMachO::S_THREAD_LOCAL_VARIABLES,
55 SectionKind::getDataRel());
58 = Ctx->getMachOSection("__DATA", "__thread_init",
59 MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
60 SectionKind::getDataRel());
62 CStringSection // .cstring
63 = Ctx->getMachOSection("__TEXT", "__cstring",
64 MCSectionMachO::S_CSTRING_LITERALS,
65 SectionKind::getMergeable1ByteCString());
67 = Ctx->getMachOSection("__TEXT","__ustring", 0,
68 SectionKind::getMergeable2ByteCString());
69 FourByteConstantSection // .literal4
70 = Ctx->getMachOSection("__TEXT", "__literal4",
71 MCSectionMachO::S_4BYTE_LITERALS,
72 SectionKind::getMergeableConst4());
73 EightByteConstantSection // .literal8
74 = Ctx->getMachOSection("__TEXT", "__literal8",
75 MCSectionMachO::S_8BYTE_LITERALS,
76 SectionKind::getMergeableConst8());
78 // ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back
79 // to using it in -static mode.
80 SixteenByteConstantSection = 0;
81 if (RelocM != Reloc::Static &&
82 T.getArch() != Triple::x86_64 && T.getArch() != Triple::ppc64)
83 SixteenByteConstantSection = // .literal16
84 Ctx->getMachOSection("__TEXT", "__literal16",
85 MCSectionMachO::S_16BYTE_LITERALS,
86 SectionKind::getMergeableConst16());
88 ReadOnlySection // .const
89 = Ctx->getMachOSection("__TEXT", "__const", 0,
90 SectionKind::getReadOnly());
93 = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
94 MCSectionMachO::S_COALESCED |
95 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
96 SectionKind::getText());
98 = Ctx->getMachOSection("__TEXT", "__const_coal",
99 MCSectionMachO::S_COALESCED,
100 SectionKind::getReadOnly());
101 ConstDataSection // .const_data
102 = Ctx->getMachOSection("__DATA", "__const", 0,
103 SectionKind::getReadOnlyWithRel());
105 = Ctx->getMachOSection("__DATA","__datacoal_nt",
106 MCSectionMachO::S_COALESCED,
107 SectionKind::getDataRel());
109 = Ctx->getMachOSection("__DATA","__common",
110 MCSectionMachO::S_ZEROFILL,
111 SectionKind::getBSS());
113 = Ctx->getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL,
114 SectionKind::getBSS());
117 LazySymbolPointerSection
118 = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
119 MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
120 SectionKind::getMetadata());
121 NonLazySymbolPointerSection
122 = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
123 MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
124 SectionKind::getMetadata());
126 if (RelocM == Reloc::Static) {
128 = Ctx->getMachOSection("__TEXT", "__constructor", 0,
129 SectionKind::getDataRel());
131 = Ctx->getMachOSection("__TEXT", "__destructor", 0,
132 SectionKind::getDataRel());
135 = Ctx->getMachOSection("__DATA", "__mod_init_func",
136 MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
137 SectionKind::getDataRel());
139 = Ctx->getMachOSection("__DATA", "__mod_term_func",
140 MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
141 SectionKind::getDataRel());
144 // Exception Handling.
145 LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
146 SectionKind::getReadOnlyWithRel());
148 if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
149 CompactUnwindSection =
150 Ctx->getMachOSection("__LD", "__compact_unwind",
151 MCSectionMachO::S_ATTR_DEBUG,
152 SectionKind::getReadOnly());
154 // Debug Information.
155 DwarfAccelNamesSection =
156 Ctx->getMachOSection("__DWARF", "__apple_names",
157 MCSectionMachO::S_ATTR_DEBUG,
158 SectionKind::getMetadata());
159 DwarfAccelObjCSection =
160 Ctx->getMachOSection("__DWARF", "__apple_objc",
161 MCSectionMachO::S_ATTR_DEBUG,
162 SectionKind::getMetadata());
163 // 16 character section limit...
164 DwarfAccelNamespaceSection =
165 Ctx->getMachOSection("__DWARF", "__apple_namespac",
166 MCSectionMachO::S_ATTR_DEBUG,
167 SectionKind::getMetadata());
168 DwarfAccelTypesSection =
169 Ctx->getMachOSection("__DWARF", "__apple_types",
170 MCSectionMachO::S_ATTR_DEBUG,
171 SectionKind::getMetadata());
174 Ctx->getMachOSection("__DWARF", "__debug_abbrev",
175 MCSectionMachO::S_ATTR_DEBUG,
176 SectionKind::getMetadata());
178 Ctx->getMachOSection("__DWARF", "__debug_info",
179 MCSectionMachO::S_ATTR_DEBUG,
180 SectionKind::getMetadata());
182 Ctx->getMachOSection("__DWARF", "__debug_line",
183 MCSectionMachO::S_ATTR_DEBUG,
184 SectionKind::getMetadata());
186 Ctx->getMachOSection("__DWARF", "__debug_frame",
187 MCSectionMachO::S_ATTR_DEBUG,
188 SectionKind::getMetadata());
189 DwarfPubTypesSection =
190 Ctx->getMachOSection("__DWARF", "__debug_pubtypes",
191 MCSectionMachO::S_ATTR_DEBUG,
192 SectionKind::getMetadata());
194 Ctx->getMachOSection("__DWARF", "__debug_str",
195 MCSectionMachO::S_ATTR_DEBUG,
196 SectionKind::getMetadata());
198 Ctx->getMachOSection("__DWARF", "__debug_loc",
199 MCSectionMachO::S_ATTR_DEBUG,
200 SectionKind::getMetadata());
201 DwarfARangesSection =
202 Ctx->getMachOSection("__DWARF", "__debug_aranges",
203 MCSectionMachO::S_ATTR_DEBUG,
204 SectionKind::getMetadata());
206 Ctx->getMachOSection("__DWARF", "__debug_ranges",
207 MCSectionMachO::S_ATTR_DEBUG,
208 SectionKind::getMetadata());
209 DwarfMacroInfoSection =
210 Ctx->getMachOSection("__DWARF", "__debug_macinfo",
211 MCSectionMachO::S_ATTR_DEBUG,
212 SectionKind::getMetadata());
213 DwarfDebugInlineSection =
214 Ctx->getMachOSection("__DWARF", "__debug_inlined",
215 MCSectionMachO::S_ATTR_DEBUG,
216 SectionKind::getMetadata());
218 TLSExtraDataSection = TLSTLVSection;
221 void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
222 if (T.getArch() == Triple::x86) {
223 PersonalityEncoding = (RelocM == Reloc::PIC_)
224 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
225 : dwarf::DW_EH_PE_absptr;
226 LSDAEncoding = (RelocM == Reloc::PIC_)
227 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
228 : dwarf::DW_EH_PE_absptr;
229 FDEEncoding = FDECFIEncoding = (RelocM == Reloc::PIC_)
230 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
231 : dwarf::DW_EH_PE_absptr;
232 TTypeEncoding = (RelocM == Reloc::PIC_)
233 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
234 : dwarf::DW_EH_PE_absptr;
235 } else if (T.getArch() == Triple::x86_64) {
236 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
238 if (RelocM == Reloc::PIC_) {
239 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
240 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
241 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
242 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
243 (CMModel == CodeModel::Small
244 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
245 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
246 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
247 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
248 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
250 PersonalityEncoding =
251 (CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
252 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
253 LSDAEncoding = (CMModel == CodeModel::Small)
254 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
255 FDEEncoding = dwarf::DW_EH_PE_udata4;
256 TTypeEncoding = (CMModel == CodeModel::Small)
257 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
261 // Solaris requires different flags for .eh_frame to seemingly every other
263 EHSectionType = ELF::SHT_PROGBITS;
264 EHSectionFlags = ELF::SHF_ALLOC;
265 if (T.getOS() == Triple::Solaris) {
266 if (T.getArch() == Triple::x86_64)
267 EHSectionType = ELF::SHT_X86_64_UNWIND;
269 EHSectionFlags |= ELF::SHF_WRITE;
275 Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
276 ELF::SHF_WRITE | ELF::SHF_ALLOC,
277 SectionKind::getBSS());
280 Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
283 SectionKind::getText());
286 Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
287 ELF::SHF_WRITE |ELF::SHF_ALLOC,
288 SectionKind::getDataRel());
291 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
293 SectionKind::getReadOnly());
296 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
297 ELF::SHF_ALLOC | ELF::SHF_TLS |
299 SectionKind::getThreadData());
302 Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
303 ELF::SHF_ALLOC | ELF::SHF_TLS |
305 SectionKind::getThreadBSS());
308 Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
309 ELF::SHF_ALLOC |ELF::SHF_WRITE,
310 SectionKind::getDataRel());
312 DataRelLocalSection =
313 Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
314 ELF::SHF_ALLOC |ELF::SHF_WRITE,
315 SectionKind::getDataRelLocal());
318 Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
319 ELF::SHF_ALLOC |ELF::SHF_WRITE,
320 SectionKind::getReadOnlyWithRel());
322 DataRelROLocalSection =
323 Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
324 ELF::SHF_ALLOC |ELF::SHF_WRITE,
325 SectionKind::getReadOnlyWithRelLocal());
327 MergeableConst4Section =
328 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
329 ELF::SHF_ALLOC |ELF::SHF_MERGE,
330 SectionKind::getMergeableConst4());
332 MergeableConst8Section =
333 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
334 ELF::SHF_ALLOC |ELF::SHF_MERGE,
335 SectionKind::getMergeableConst8());
337 MergeableConst16Section =
338 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
339 ELF::SHF_ALLOC |ELF::SHF_MERGE,
340 SectionKind::getMergeableConst16());
343 Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
344 ELF::SHF_ALLOC |ELF::SHF_WRITE,
345 SectionKind::getDataRel());
348 Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
349 ELF::SHF_ALLOC |ELF::SHF_WRITE,
350 SectionKind::getDataRel());
352 // Exception Handling Sections.
354 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
355 // it contains relocatable pointers. In PIC mode, this is probably a big
356 // runtime hit for C++ apps. Either the contents of the LSDA need to be
357 // adjusted or this should be a data section.
359 Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
361 SectionKind::getReadOnly());
363 // Debug Info Sections.
365 Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
366 SectionKind::getMetadata());
368 Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0,
369 SectionKind::getMetadata());
371 Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0,
372 SectionKind::getMetadata());
374 Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0,
375 SectionKind::getMetadata());
376 DwarfPubTypesSection =
377 Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0,
378 SectionKind::getMetadata());
380 Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
381 ELF::SHF_MERGE | ELF::SHF_STRINGS,
382 SectionKind::getMergeable1ByteCString());
384 Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
385 SectionKind::getMetadata());
386 DwarfARangesSection =
387 Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0,
388 SectionKind::getMetadata());
390 Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0,
391 SectionKind::getMetadata());
392 DwarfMacroInfoSection =
393 Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0,
394 SectionKind::getMetadata());
396 // DWARF5 Experimental Debug Info
398 // Accelerator Tables
399 DwarfAccelNamesSection =
400 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0,
401 SectionKind::getMetadata());
402 DwarfAccelObjCSection =
403 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0,
404 SectionKind::getMetadata());
405 DwarfAccelNamespaceSection =
406 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0,
407 SectionKind::getMetadata());
408 DwarfAccelTypesSection =
409 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0,
410 SectionKind::getMetadata());
414 void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
417 Ctx->getCOFFSection(".text",
418 COFF::IMAGE_SCN_CNT_CODE |
419 COFF::IMAGE_SCN_MEM_EXECUTE |
420 COFF::IMAGE_SCN_MEM_READ,
421 SectionKind::getText());
423 Ctx->getCOFFSection(".data",
424 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
425 COFF::IMAGE_SCN_MEM_READ |
426 COFF::IMAGE_SCN_MEM_WRITE,
427 SectionKind::getDataRel());
429 Ctx->getCOFFSection(".rdata",
430 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
431 COFF::IMAGE_SCN_MEM_READ,
432 SectionKind::getReadOnly());
433 if (T.getOS() == Triple::Win32) {
435 Ctx->getCOFFSection(".CRT$XCU",
436 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
437 COFF::IMAGE_SCN_MEM_READ,
438 SectionKind::getReadOnly());
441 Ctx->getCOFFSection(".ctors",
442 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
443 COFF::IMAGE_SCN_MEM_READ |
444 COFF::IMAGE_SCN_MEM_WRITE,
445 SectionKind::getDataRel());
449 if (T.getOS() == Triple::Win32) {
451 Ctx->getCOFFSection(".CRT$XTX",
452 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
453 COFF::IMAGE_SCN_MEM_READ,
454 SectionKind::getReadOnly());
457 Ctx->getCOFFSection(".dtors",
458 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
459 COFF::IMAGE_SCN_MEM_READ |
460 COFF::IMAGE_SCN_MEM_WRITE,
461 SectionKind::getDataRel());
464 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
465 // though it contains relocatable pointers. In PIC mode, this is probably a
466 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
467 // adjusted or this should be a data section.
469 Ctx->getCOFFSection(".gcc_except_table",
470 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
471 COFF::IMAGE_SCN_MEM_READ,
472 SectionKind::getReadOnly());
476 Ctx->getCOFFSection(".debug_abbrev",
477 COFF::IMAGE_SCN_MEM_DISCARDABLE |
478 COFF::IMAGE_SCN_MEM_READ,
479 SectionKind::getMetadata());
481 Ctx->getCOFFSection(".debug_info",
482 COFF::IMAGE_SCN_MEM_DISCARDABLE |
483 COFF::IMAGE_SCN_MEM_READ,
484 SectionKind::getMetadata());
486 Ctx->getCOFFSection(".debug_line",
487 COFF::IMAGE_SCN_MEM_DISCARDABLE |
488 COFF::IMAGE_SCN_MEM_READ,
489 SectionKind::getMetadata());
491 Ctx->getCOFFSection(".debug_frame",
492 COFF::IMAGE_SCN_MEM_DISCARDABLE |
493 COFF::IMAGE_SCN_MEM_READ,
494 SectionKind::getMetadata());
495 DwarfPubTypesSection =
496 Ctx->getCOFFSection(".debug_pubtypes",
497 COFF::IMAGE_SCN_MEM_DISCARDABLE |
498 COFF::IMAGE_SCN_MEM_READ,
499 SectionKind::getMetadata());
501 Ctx->getCOFFSection(".debug_str",
502 COFF::IMAGE_SCN_MEM_DISCARDABLE |
503 COFF::IMAGE_SCN_MEM_READ,
504 SectionKind::getMetadata());
506 Ctx->getCOFFSection(".debug_loc",
507 COFF::IMAGE_SCN_MEM_DISCARDABLE |
508 COFF::IMAGE_SCN_MEM_READ,
509 SectionKind::getMetadata());
510 DwarfARangesSection =
511 Ctx->getCOFFSection(".debug_aranges",
512 COFF::IMAGE_SCN_MEM_DISCARDABLE |
513 COFF::IMAGE_SCN_MEM_READ,
514 SectionKind::getMetadata());
516 Ctx->getCOFFSection(".debug_ranges",
517 COFF::IMAGE_SCN_MEM_DISCARDABLE |
518 COFF::IMAGE_SCN_MEM_READ,
519 SectionKind::getMetadata());
520 DwarfMacroInfoSection =
521 Ctx->getCOFFSection(".debug_macinfo",
522 COFF::IMAGE_SCN_MEM_DISCARDABLE |
523 COFF::IMAGE_SCN_MEM_READ,
524 SectionKind::getMetadata());
527 Ctx->getCOFFSection(".drectve",
528 COFF::IMAGE_SCN_LNK_INFO,
529 SectionKind::getMetadata());
532 Ctx->getCOFFSection(".pdata",
533 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
534 COFF::IMAGE_SCN_MEM_READ,
535 SectionKind::getDataRel());
538 Ctx->getCOFFSection(".xdata",
539 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
540 COFF::IMAGE_SCN_MEM_READ,
541 SectionKind::getDataRel());
543 Ctx->getCOFFSection(".tls$",
544 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
545 COFF::IMAGE_SCN_MEM_READ |
546 COFF::IMAGE_SCN_MEM_WRITE,
547 SectionKind::getDataRel());
550 void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
558 CommDirectiveSupportsAlignment = true;
559 SupportsWeakOmittedEHFrame = true;
560 IsFunctionEHFrameSymbolPrivate = true;
562 PersonalityEncoding = LSDAEncoding = FDEEncoding = FDECFIEncoding =
563 TTypeEncoding = dwarf::DW_EH_PE_absptr;
565 EHFrameSection = 0; // Created on demand.
566 CompactUnwindSection = 0; // Used only by selected targets.
567 DwarfAccelNamesSection = 0; // Used only by selected targets.
568 DwarfAccelObjCSection = 0; // Used only by selected targets.
569 DwarfAccelNamespaceSection = 0; // Used only by selected targets.
570 DwarfAccelTypesSection = 0; // Used only by selected targets.
573 Triple::ArchType Arch = T.getArch();
574 // FIXME: Checking for Arch here to filter out bogus triples such as
575 // cellspu-apple-darwin. Perhaps we should fix in Triple?
576 if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
577 Arch == Triple::arm || Arch == Triple::thumb ||
578 Arch == Triple::ppc || Arch == Triple::ppc64 ||
579 Arch == Triple::UnknownArch) &&
580 (T.isOSDarwin() || T.getEnvironment() == Triple::MachO)) {
582 InitMachOMCObjectFileInfo(T);
583 } else if ((Arch == Triple::x86 || Arch == Triple::x86_64) &&
584 (T.getEnvironment() != Triple::ELF) &&
585 (T.getOS() == Triple::MinGW32 || T.getOS() == Triple::Cygwin ||
586 T.getOS() == Triple::Win32)) {
588 InitCOFFMCObjectFileInfo(T);
591 InitELFMCObjectFileInfo(T);
595 void MCObjectFileInfo::InitEHFrameSection() {
598 Ctx->getMachOSection("__TEXT", "__eh_frame",
599 MCSectionMachO::S_COALESCED |
600 MCSectionMachO::S_ATTR_NO_TOC |
601 MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
602 MCSectionMachO::S_ATTR_LIVE_SUPPORT,
603 SectionKind::getReadOnly());
604 else if (Env == IsELF)
606 Ctx->getELFSection(".eh_frame", EHSectionType,
608 SectionKind::getDataRel());
611 Ctx->getCOFFSection(".eh_frame",
612 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
613 COFF::IMAGE_SCN_MEM_READ |
614 COFF::IMAGE_SCN_MEM_WRITE,
615 SectionKind::getDataRel());