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/Triple.h"
12 #include "llvm/MC/MCContext.h"
13 #include "llvm/MC/MCSection.h"
14 #include "llvm/MC/MCSectionCOFF.h"
15 #include "llvm/MC/MCSectionELF.h"
16 #include "llvm/MC/MCSectionMachO.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;
259 } else if (T.getArch() == Triple::aarch64) {
260 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
262 // The small model guarantees static code/data size < 4GB, but not where it
263 // will be in memory. Most of these could end up >2GB away so even a signed
264 // pc-relative 32-bit address is insufficient, theoretically.
265 if (RelocM == Reloc::PIC_) {
266 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
267 dwarf::DW_EH_PE_sdata8;
268 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
269 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
270 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
271 dwarf::DW_EH_PE_sdata8;
273 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
274 LSDAEncoding = dwarf::DW_EH_PE_absptr;
275 FDEEncoding = dwarf::DW_EH_PE_udata4;
276 TTypeEncoding = dwarf::DW_EH_PE_absptr;
278 } else if (T.getArch() == Triple::ppc64) {
279 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
280 dwarf::DW_EH_PE_udata8;
281 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
282 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
283 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
284 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
285 dwarf::DW_EH_PE_udata8;
288 // Solaris requires different flags for .eh_frame to seemingly every other
290 EHSectionType = ELF::SHT_PROGBITS;
291 EHSectionFlags = ELF::SHF_ALLOC;
292 if (T.getOS() == Triple::Solaris) {
293 if (T.getArch() == Triple::x86_64)
294 EHSectionType = ELF::SHT_X86_64_UNWIND;
296 EHSectionFlags |= ELF::SHF_WRITE;
302 Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
303 ELF::SHF_WRITE | ELF::SHF_ALLOC,
304 SectionKind::getBSS());
307 Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
310 SectionKind::getText());
313 Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
314 ELF::SHF_WRITE |ELF::SHF_ALLOC,
315 SectionKind::getDataRel());
318 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
320 SectionKind::getReadOnly());
323 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
324 ELF::SHF_ALLOC | ELF::SHF_TLS |
326 SectionKind::getThreadData());
329 Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
330 ELF::SHF_ALLOC | ELF::SHF_TLS |
332 SectionKind::getThreadBSS());
335 Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
336 ELF::SHF_ALLOC |ELF::SHF_WRITE,
337 SectionKind::getDataRel());
339 DataRelLocalSection =
340 Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
341 ELF::SHF_ALLOC |ELF::SHF_WRITE,
342 SectionKind::getDataRelLocal());
345 Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
346 ELF::SHF_ALLOC |ELF::SHF_WRITE,
347 SectionKind::getReadOnlyWithRel());
349 DataRelROLocalSection =
350 Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
351 ELF::SHF_ALLOC |ELF::SHF_WRITE,
352 SectionKind::getReadOnlyWithRelLocal());
354 MergeableConst4Section =
355 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
356 ELF::SHF_ALLOC |ELF::SHF_MERGE,
357 SectionKind::getMergeableConst4());
359 MergeableConst8Section =
360 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
361 ELF::SHF_ALLOC |ELF::SHF_MERGE,
362 SectionKind::getMergeableConst8());
364 MergeableConst16Section =
365 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
366 ELF::SHF_ALLOC |ELF::SHF_MERGE,
367 SectionKind::getMergeableConst16());
370 Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
371 ELF::SHF_ALLOC |ELF::SHF_WRITE,
372 SectionKind::getDataRel());
375 Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
376 ELF::SHF_ALLOC |ELF::SHF_WRITE,
377 SectionKind::getDataRel());
379 // Exception Handling Sections.
381 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
382 // it contains relocatable pointers. In PIC mode, this is probably a big
383 // runtime hit for C++ apps. Either the contents of the LSDA need to be
384 // adjusted or this should be a data section.
386 Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
388 SectionKind::getReadOnly());
390 // Debug Info Sections.
392 Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
393 SectionKind::getMetadata());
395 Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0,
396 SectionKind::getMetadata());
398 Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0,
399 SectionKind::getMetadata());
401 Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0,
402 SectionKind::getMetadata());
403 DwarfPubTypesSection =
404 Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0,
405 SectionKind::getMetadata());
407 Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
408 ELF::SHF_MERGE | ELF::SHF_STRINGS,
409 SectionKind::getMergeable1ByteCString());
411 Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
412 SectionKind::getMetadata());
413 DwarfARangesSection =
414 Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0,
415 SectionKind::getMetadata());
417 Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0,
418 SectionKind::getMetadata());
419 DwarfMacroInfoSection =
420 Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0,
421 SectionKind::getMetadata());
423 // DWARF5 Experimental Debug Info
425 // Accelerator Tables
426 DwarfAccelNamesSection =
427 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0,
428 SectionKind::getMetadata());
429 DwarfAccelObjCSection =
430 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0,
431 SectionKind::getMetadata());
432 DwarfAccelNamespaceSection =
433 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0,
434 SectionKind::getMetadata());
435 DwarfAccelTypesSection =
436 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0,
437 SectionKind::getMetadata());
440 DwarfInfoDWOSection =
441 Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0,
442 SectionKind::getMetadata());
443 DwarfAbbrevDWOSection =
444 Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0,
445 SectionKind::getMetadata());
447 Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
448 ELF::SHF_MERGE | ELF::SHF_STRINGS,
449 SectionKind::getMergeable1ByteCString());
450 DwarfLineDWOSection =
451 Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0,
452 SectionKind::getMetadata());
454 Ctx->getELFSection(".debug_loc.dwo", ELF::SHT_PROGBITS, 0,
455 SectionKind::getMetadata());
456 DwarfStrOffDWOSection =
457 Ctx->getELFSection(".debug_str_offsets.dwo", ELF::SHT_PROGBITS, 0,
458 SectionKind::getMetadata());
460 Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0,
461 SectionKind::getMetadata());
465 void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
468 Ctx->getCOFFSection(".text",
469 COFF::IMAGE_SCN_CNT_CODE |
470 COFF::IMAGE_SCN_MEM_EXECUTE |
471 COFF::IMAGE_SCN_MEM_READ,
472 SectionKind::getText());
474 Ctx->getCOFFSection(".data",
475 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
476 COFF::IMAGE_SCN_MEM_READ |
477 COFF::IMAGE_SCN_MEM_WRITE,
478 SectionKind::getDataRel());
480 Ctx->getCOFFSection(".rdata",
481 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
482 COFF::IMAGE_SCN_MEM_READ,
483 SectionKind::getReadOnly());
484 if (T.getOS() == Triple::Win32) {
486 Ctx->getCOFFSection(".CRT$XCU",
487 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
488 COFF::IMAGE_SCN_MEM_READ,
489 SectionKind::getReadOnly());
492 Ctx->getCOFFSection(".ctors",
493 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
494 COFF::IMAGE_SCN_MEM_READ |
495 COFF::IMAGE_SCN_MEM_WRITE,
496 SectionKind::getDataRel());
500 if (T.getOS() == Triple::Win32) {
502 Ctx->getCOFFSection(".CRT$XTX",
503 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
504 COFF::IMAGE_SCN_MEM_READ,
505 SectionKind::getReadOnly());
508 Ctx->getCOFFSection(".dtors",
509 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
510 COFF::IMAGE_SCN_MEM_READ |
511 COFF::IMAGE_SCN_MEM_WRITE,
512 SectionKind::getDataRel());
515 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
516 // though it contains relocatable pointers. In PIC mode, this is probably a
517 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
518 // adjusted or this should be a data section.
520 Ctx->getCOFFSection(".gcc_except_table",
521 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
522 COFF::IMAGE_SCN_MEM_READ,
523 SectionKind::getReadOnly());
527 Ctx->getCOFFSection(".debug_abbrev",
528 COFF::IMAGE_SCN_MEM_DISCARDABLE |
529 COFF::IMAGE_SCN_MEM_READ,
530 SectionKind::getMetadata());
532 Ctx->getCOFFSection(".debug_info",
533 COFF::IMAGE_SCN_MEM_DISCARDABLE |
534 COFF::IMAGE_SCN_MEM_READ,
535 SectionKind::getMetadata());
537 Ctx->getCOFFSection(".debug_line",
538 COFF::IMAGE_SCN_MEM_DISCARDABLE |
539 COFF::IMAGE_SCN_MEM_READ,
540 SectionKind::getMetadata());
542 Ctx->getCOFFSection(".debug_frame",
543 COFF::IMAGE_SCN_MEM_DISCARDABLE |
544 COFF::IMAGE_SCN_MEM_READ,
545 SectionKind::getMetadata());
546 DwarfPubTypesSection =
547 Ctx->getCOFFSection(".debug_pubtypes",
548 COFF::IMAGE_SCN_MEM_DISCARDABLE |
549 COFF::IMAGE_SCN_MEM_READ,
550 SectionKind::getMetadata());
552 Ctx->getCOFFSection(".debug_str",
553 COFF::IMAGE_SCN_MEM_DISCARDABLE |
554 COFF::IMAGE_SCN_MEM_READ,
555 SectionKind::getMetadata());
557 Ctx->getCOFFSection(".debug_loc",
558 COFF::IMAGE_SCN_MEM_DISCARDABLE |
559 COFF::IMAGE_SCN_MEM_READ,
560 SectionKind::getMetadata());
561 DwarfARangesSection =
562 Ctx->getCOFFSection(".debug_aranges",
563 COFF::IMAGE_SCN_MEM_DISCARDABLE |
564 COFF::IMAGE_SCN_MEM_READ,
565 SectionKind::getMetadata());
567 Ctx->getCOFFSection(".debug_ranges",
568 COFF::IMAGE_SCN_MEM_DISCARDABLE |
569 COFF::IMAGE_SCN_MEM_READ,
570 SectionKind::getMetadata());
571 DwarfMacroInfoSection =
572 Ctx->getCOFFSection(".debug_macinfo",
573 COFF::IMAGE_SCN_MEM_DISCARDABLE |
574 COFF::IMAGE_SCN_MEM_READ,
575 SectionKind::getMetadata());
578 Ctx->getCOFFSection(".drectve",
579 COFF::IMAGE_SCN_LNK_INFO,
580 SectionKind::getMetadata());
583 Ctx->getCOFFSection(".pdata",
584 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
585 COFF::IMAGE_SCN_MEM_READ,
586 SectionKind::getDataRel());
589 Ctx->getCOFFSection(".xdata",
590 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
591 COFF::IMAGE_SCN_MEM_READ,
592 SectionKind::getDataRel());
594 Ctx->getCOFFSection(".tls$",
595 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
596 COFF::IMAGE_SCN_MEM_READ |
597 COFF::IMAGE_SCN_MEM_WRITE,
598 SectionKind::getDataRel());
601 void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
609 CommDirectiveSupportsAlignment = true;
610 SupportsWeakOmittedEHFrame = true;
611 IsFunctionEHFrameSymbolPrivate = true;
613 PersonalityEncoding = LSDAEncoding = FDEEncoding = FDECFIEncoding =
614 TTypeEncoding = dwarf::DW_EH_PE_absptr;
616 EHFrameSection = 0; // Created on demand.
617 CompactUnwindSection = 0; // Used only by selected targets.
618 DwarfAccelNamesSection = 0; // Used only by selected targets.
619 DwarfAccelObjCSection = 0; // Used only by selected targets.
620 DwarfAccelNamespaceSection = 0; // Used only by selected targets.
621 DwarfAccelTypesSection = 0; // Used only by selected targets.
624 Triple::ArchType Arch = T.getArch();
625 // FIXME: Checking for Arch here to filter out bogus triples such as
626 // cellspu-apple-darwin. Perhaps we should fix in Triple?
627 if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
628 Arch == Triple::arm || Arch == Triple::thumb ||
629 Arch == Triple::ppc || Arch == Triple::ppc64 ||
630 Arch == Triple::UnknownArch) &&
631 (T.isOSDarwin() || T.getEnvironment() == Triple::MachO)) {
633 InitMachOMCObjectFileInfo(T);
634 } else if ((Arch == Triple::x86 || Arch == Triple::x86_64) &&
635 (T.getEnvironment() != Triple::ELF) &&
636 (T.getOS() == Triple::MinGW32 || T.getOS() == Triple::Cygwin ||
637 T.getOS() == Triple::Win32)) {
639 InitCOFFMCObjectFileInfo(T);
642 InitELFMCObjectFileInfo(T);
646 void MCObjectFileInfo::InitEHFrameSection() {
649 Ctx->getMachOSection("__TEXT", "__eh_frame",
650 MCSectionMachO::S_COALESCED |
651 MCSectionMachO::S_ATTR_NO_TOC |
652 MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
653 MCSectionMachO::S_ATTR_LIVE_SUPPORT,
654 SectionKind::getReadOnly());
655 else if (Env == IsELF)
657 Ctx->getELFSection(".eh_frame", EHSectionType,
659 SectionKind::getDataRel());
662 Ctx->getCOFFSection(".eh_frame",
663 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
664 COFF::IMAGE_SCN_MEM_READ |
665 COFF::IMAGE_SCN_MEM_WRITE,
666 SectionKind::getDataRel());