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 if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
155 CompactUnwindDwarfEHFrameOnly = 0x04000000;
158 // Debug Information.
159 DwarfAccelNamesSection =
160 Ctx->getMachOSection("__DWARF", "__apple_names",
161 MCSectionMachO::S_ATTR_DEBUG,
162 SectionKind::getMetadata());
163 DwarfAccelObjCSection =
164 Ctx->getMachOSection("__DWARF", "__apple_objc",
165 MCSectionMachO::S_ATTR_DEBUG,
166 SectionKind::getMetadata());
167 // 16 character section limit...
168 DwarfAccelNamespaceSection =
169 Ctx->getMachOSection("__DWARF", "__apple_namespac",
170 MCSectionMachO::S_ATTR_DEBUG,
171 SectionKind::getMetadata());
172 DwarfAccelTypesSection =
173 Ctx->getMachOSection("__DWARF", "__apple_types",
174 MCSectionMachO::S_ATTR_DEBUG,
175 SectionKind::getMetadata());
178 Ctx->getMachOSection("__DWARF", "__debug_abbrev",
179 MCSectionMachO::S_ATTR_DEBUG,
180 SectionKind::getMetadata());
182 Ctx->getMachOSection("__DWARF", "__debug_info",
183 MCSectionMachO::S_ATTR_DEBUG,
184 SectionKind::getMetadata());
186 Ctx->getMachOSection("__DWARF", "__debug_line",
187 MCSectionMachO::S_ATTR_DEBUG,
188 SectionKind::getMetadata());
190 Ctx->getMachOSection("__DWARF", "__debug_frame",
191 MCSectionMachO::S_ATTR_DEBUG,
192 SectionKind::getMetadata());
193 DwarfPubNamesSection =
194 Ctx->getMachOSection("__DWARF", "__debug_pubnames",
195 MCSectionMachO::S_ATTR_DEBUG,
196 SectionKind::getMetadata());
197 DwarfPubTypesSection =
198 Ctx->getMachOSection("__DWARF", "__debug_pubtypes",
199 MCSectionMachO::S_ATTR_DEBUG,
200 SectionKind::getMetadata());
202 Ctx->getMachOSection("__DWARF", "__debug_str",
203 MCSectionMachO::S_ATTR_DEBUG,
204 SectionKind::getMetadata());
206 Ctx->getMachOSection("__DWARF", "__debug_loc",
207 MCSectionMachO::S_ATTR_DEBUG,
208 SectionKind::getMetadata());
209 DwarfARangesSection =
210 Ctx->getMachOSection("__DWARF", "__debug_aranges",
211 MCSectionMachO::S_ATTR_DEBUG,
212 SectionKind::getMetadata());
214 Ctx->getMachOSection("__DWARF", "__debug_ranges",
215 MCSectionMachO::S_ATTR_DEBUG,
216 SectionKind::getMetadata());
217 DwarfMacroInfoSection =
218 Ctx->getMachOSection("__DWARF", "__debug_macinfo",
219 MCSectionMachO::S_ATTR_DEBUG,
220 SectionKind::getMetadata());
221 DwarfDebugInlineSection =
222 Ctx->getMachOSection("__DWARF", "__debug_inlined",
223 MCSectionMachO::S_ATTR_DEBUG,
224 SectionKind::getMetadata());
226 TLSExtraDataSection = TLSTLVSection;
229 void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
230 if (T.getArch() == Triple::mips ||
231 T.getArch() == Triple::mipsel)
232 FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
233 else if (T.getArch() == Triple::mips64 ||
234 T.getArch() == Triple::mips64el)
235 FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
237 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
239 if (T.getArch() == Triple::x86) {
240 PersonalityEncoding = (RelocM == Reloc::PIC_)
241 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
242 : dwarf::DW_EH_PE_absptr;
243 LSDAEncoding = (RelocM == Reloc::PIC_)
244 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
245 : dwarf::DW_EH_PE_absptr;
246 FDEEncoding = (RelocM == Reloc::PIC_)
247 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
248 : dwarf::DW_EH_PE_absptr;
249 TTypeEncoding = (RelocM == Reloc::PIC_)
250 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
251 : dwarf::DW_EH_PE_absptr;
252 } else if (T.getArch() == Triple::x86_64) {
253 if (RelocM == Reloc::PIC_) {
254 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
255 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
256 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
257 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
258 (CMModel == CodeModel::Small
259 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
260 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
261 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
262 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
263 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
265 PersonalityEncoding =
266 (CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
267 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
268 LSDAEncoding = (CMModel == CodeModel::Small)
269 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
270 FDEEncoding = dwarf::DW_EH_PE_udata4;
271 TTypeEncoding = (CMModel == CodeModel::Small)
272 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
274 } else if (T.getArch() == Triple::aarch64) {
275 // The small model guarantees static code/data size < 4GB, but not where it
276 // will be in memory. Most of these could end up >2GB away so even a signed
277 // pc-relative 32-bit address is insufficient, theoretically.
278 if (RelocM == Reloc::PIC_) {
279 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
280 dwarf::DW_EH_PE_sdata8;
281 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
282 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
283 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
284 dwarf::DW_EH_PE_sdata8;
286 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
287 LSDAEncoding = dwarf::DW_EH_PE_absptr;
288 FDEEncoding = dwarf::DW_EH_PE_udata4;
289 TTypeEncoding = dwarf::DW_EH_PE_absptr;
291 } else if (T.getArch() == Triple::ppc64) {
292 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
293 dwarf::DW_EH_PE_udata8;
294 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
295 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
296 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
297 dwarf::DW_EH_PE_udata8;
298 } else if (T.getArch() == Triple::systemz) {
299 // All currently-defined code models guarantee that 4-byte PC-relative
300 // values will be in range.
301 if (RelocM == Reloc::PIC_) {
302 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
303 dwarf::DW_EH_PE_sdata4;
304 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
305 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
306 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
307 dwarf::DW_EH_PE_sdata4;
309 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
310 LSDAEncoding = dwarf::DW_EH_PE_absptr;
311 FDEEncoding = dwarf::DW_EH_PE_absptr;
312 TTypeEncoding = dwarf::DW_EH_PE_absptr;
316 // Solaris requires different flags for .eh_frame to seemingly every other
318 EHSectionType = ELF::SHT_PROGBITS;
319 EHSectionFlags = ELF::SHF_ALLOC;
320 if (T.getOS() == Triple::Solaris) {
321 if (T.getArch() == Triple::x86_64)
322 EHSectionType = ELF::SHT_X86_64_UNWIND;
324 EHSectionFlags |= ELF::SHF_WRITE;
330 Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
331 ELF::SHF_WRITE | ELF::SHF_ALLOC,
332 SectionKind::getBSS());
335 Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
338 SectionKind::getText());
341 Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
342 ELF::SHF_WRITE |ELF::SHF_ALLOC,
343 SectionKind::getDataRel());
346 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
348 SectionKind::getReadOnly());
351 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
352 ELF::SHF_ALLOC | ELF::SHF_TLS |
354 SectionKind::getThreadData());
357 Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
358 ELF::SHF_ALLOC | ELF::SHF_TLS |
360 SectionKind::getThreadBSS());
363 Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
364 ELF::SHF_ALLOC |ELF::SHF_WRITE,
365 SectionKind::getDataRel());
367 DataRelLocalSection =
368 Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
369 ELF::SHF_ALLOC |ELF::SHF_WRITE,
370 SectionKind::getDataRelLocal());
373 Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
374 ELF::SHF_ALLOC |ELF::SHF_WRITE,
375 SectionKind::getReadOnlyWithRel());
377 DataRelROLocalSection =
378 Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
379 ELF::SHF_ALLOC |ELF::SHF_WRITE,
380 SectionKind::getReadOnlyWithRelLocal());
382 MergeableConst4Section =
383 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
384 ELF::SHF_ALLOC |ELF::SHF_MERGE,
385 SectionKind::getMergeableConst4());
387 MergeableConst8Section =
388 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
389 ELF::SHF_ALLOC |ELF::SHF_MERGE,
390 SectionKind::getMergeableConst8());
392 MergeableConst16Section =
393 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
394 ELF::SHF_ALLOC |ELF::SHF_MERGE,
395 SectionKind::getMergeableConst16());
398 Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
399 ELF::SHF_ALLOC |ELF::SHF_WRITE,
400 SectionKind::getDataRel());
403 Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
404 ELF::SHF_ALLOC |ELF::SHF_WRITE,
405 SectionKind::getDataRel());
407 // Exception Handling Sections.
409 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
410 // it contains relocatable pointers. In PIC mode, this is probably a big
411 // runtime hit for C++ apps. Either the contents of the LSDA need to be
412 // adjusted or this should be a data section.
414 Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
416 SectionKind::getReadOnly());
418 // Debug Info Sections.
420 Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
421 SectionKind::getMetadata());
423 Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0,
424 SectionKind::getMetadata());
426 Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0,
427 SectionKind::getMetadata());
429 Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0,
430 SectionKind::getMetadata());
431 DwarfPubNamesSection =
432 Ctx->getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0,
433 SectionKind::getMetadata());
434 DwarfPubTypesSection =
435 Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0,
436 SectionKind::getMetadata());
438 Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
439 ELF::SHF_MERGE | ELF::SHF_STRINGS,
440 SectionKind::getMergeable1ByteCString());
442 Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
443 SectionKind::getMetadata());
444 DwarfARangesSection =
445 Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0,
446 SectionKind::getMetadata());
448 Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0,
449 SectionKind::getMetadata());
450 DwarfMacroInfoSection =
451 Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0,
452 SectionKind::getMetadata());
454 // DWARF5 Experimental Debug Info
456 // Accelerator Tables
457 DwarfAccelNamesSection =
458 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0,
459 SectionKind::getMetadata());
460 DwarfAccelObjCSection =
461 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0,
462 SectionKind::getMetadata());
463 DwarfAccelNamespaceSection =
464 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0,
465 SectionKind::getMetadata());
466 DwarfAccelTypesSection =
467 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0,
468 SectionKind::getMetadata());
471 DwarfInfoDWOSection =
472 Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0,
473 SectionKind::getMetadata());
474 DwarfAbbrevDWOSection =
475 Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0,
476 SectionKind::getMetadata());
478 Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
479 ELF::SHF_MERGE | ELF::SHF_STRINGS,
480 SectionKind::getMergeable1ByteCString());
481 DwarfLineDWOSection =
482 Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0,
483 SectionKind::getMetadata());
485 Ctx->getELFSection(".debug_loc.dwo", ELF::SHT_PROGBITS, 0,
486 SectionKind::getMetadata());
487 DwarfStrOffDWOSection =
488 Ctx->getELFSection(".debug_str_offsets.dwo", ELF::SHT_PROGBITS, 0,
489 SectionKind::getMetadata());
491 Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0,
492 SectionKind::getMetadata());
496 void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
499 Ctx->getCOFFSection(".text",
500 COFF::IMAGE_SCN_CNT_CODE |
501 COFF::IMAGE_SCN_MEM_EXECUTE |
502 COFF::IMAGE_SCN_MEM_READ,
503 SectionKind::getText());
505 Ctx->getCOFFSection(".data",
506 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
507 COFF::IMAGE_SCN_MEM_READ |
508 COFF::IMAGE_SCN_MEM_WRITE,
509 SectionKind::getDataRel());
511 Ctx->getCOFFSection(".rdata",
512 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
513 COFF::IMAGE_SCN_MEM_READ,
514 SectionKind::getReadOnly());
515 if (T.getOS() == Triple::Win32) {
517 Ctx->getCOFFSection(".CRT$XCU",
518 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
519 COFF::IMAGE_SCN_MEM_READ,
520 SectionKind::getReadOnly());
523 Ctx->getCOFFSection(".ctors",
524 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
525 COFF::IMAGE_SCN_MEM_READ |
526 COFF::IMAGE_SCN_MEM_WRITE,
527 SectionKind::getDataRel());
531 if (T.getOS() == Triple::Win32) {
533 Ctx->getCOFFSection(".CRT$XTX",
534 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
535 COFF::IMAGE_SCN_MEM_READ,
536 SectionKind::getReadOnly());
539 Ctx->getCOFFSection(".dtors",
540 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
541 COFF::IMAGE_SCN_MEM_READ |
542 COFF::IMAGE_SCN_MEM_WRITE,
543 SectionKind::getDataRel());
546 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
547 // though it contains relocatable pointers. In PIC mode, this is probably a
548 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
549 // adjusted or this should be a data section.
551 Ctx->getCOFFSection(".gcc_except_table",
552 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
553 COFF::IMAGE_SCN_MEM_READ,
554 SectionKind::getReadOnly());
558 Ctx->getCOFFSection(".debug_abbrev",
559 COFF::IMAGE_SCN_MEM_DISCARDABLE |
560 COFF::IMAGE_SCN_MEM_READ,
561 SectionKind::getMetadata());
563 Ctx->getCOFFSection(".debug_info",
564 COFF::IMAGE_SCN_MEM_DISCARDABLE |
565 COFF::IMAGE_SCN_MEM_READ,
566 SectionKind::getMetadata());
568 Ctx->getCOFFSection(".debug_line",
569 COFF::IMAGE_SCN_MEM_DISCARDABLE |
570 COFF::IMAGE_SCN_MEM_READ,
571 SectionKind::getMetadata());
573 Ctx->getCOFFSection(".debug_frame",
574 COFF::IMAGE_SCN_MEM_DISCARDABLE |
575 COFF::IMAGE_SCN_MEM_READ,
576 SectionKind::getMetadata());
577 DwarfPubNamesSection =
578 Ctx->getCOFFSection(".debug_pubnames",
579 COFF::IMAGE_SCN_MEM_DISCARDABLE |
580 COFF::IMAGE_SCN_MEM_READ,
581 SectionKind::getMetadata());
582 DwarfPubTypesSection =
583 Ctx->getCOFFSection(".debug_pubtypes",
584 COFF::IMAGE_SCN_MEM_DISCARDABLE |
585 COFF::IMAGE_SCN_MEM_READ,
586 SectionKind::getMetadata());
588 Ctx->getCOFFSection(".debug_str",
589 COFF::IMAGE_SCN_MEM_DISCARDABLE |
590 COFF::IMAGE_SCN_MEM_READ,
591 SectionKind::getMetadata());
593 Ctx->getCOFFSection(".debug_loc",
594 COFF::IMAGE_SCN_MEM_DISCARDABLE |
595 COFF::IMAGE_SCN_MEM_READ,
596 SectionKind::getMetadata());
597 DwarfARangesSection =
598 Ctx->getCOFFSection(".debug_aranges",
599 COFF::IMAGE_SCN_MEM_DISCARDABLE |
600 COFF::IMAGE_SCN_MEM_READ,
601 SectionKind::getMetadata());
603 Ctx->getCOFFSection(".debug_ranges",
604 COFF::IMAGE_SCN_MEM_DISCARDABLE |
605 COFF::IMAGE_SCN_MEM_READ,
606 SectionKind::getMetadata());
607 DwarfMacroInfoSection =
608 Ctx->getCOFFSection(".debug_macinfo",
609 COFF::IMAGE_SCN_MEM_DISCARDABLE |
610 COFF::IMAGE_SCN_MEM_READ,
611 SectionKind::getMetadata());
614 Ctx->getCOFFSection(".drectve",
615 COFF::IMAGE_SCN_LNK_INFO,
616 SectionKind::getMetadata());
619 Ctx->getCOFFSection(".pdata",
620 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
621 COFF::IMAGE_SCN_MEM_READ,
622 SectionKind::getDataRel());
625 Ctx->getCOFFSection(".xdata",
626 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
627 COFF::IMAGE_SCN_MEM_READ,
628 SectionKind::getDataRel());
630 Ctx->getCOFFSection(".tls$",
631 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
632 COFF::IMAGE_SCN_MEM_READ |
633 COFF::IMAGE_SCN_MEM_WRITE,
634 SectionKind::getDataRel());
637 void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
645 CommDirectiveSupportsAlignment = true;
646 SupportsWeakOmittedEHFrame = true;
647 IsFunctionEHFrameSymbolPrivate = true;
649 PersonalityEncoding = LSDAEncoding = FDEEncoding = FDECFIEncoding =
650 TTypeEncoding = dwarf::DW_EH_PE_absptr;
652 CompactUnwindDwarfEHFrameOnly = 0;
654 EHFrameSection = 0; // Created on demand.
655 CompactUnwindSection = 0; // Used only by selected targets.
656 DwarfAccelNamesSection = 0; // Used only by selected targets.
657 DwarfAccelObjCSection = 0; // Used only by selected targets.
658 DwarfAccelNamespaceSection = 0; // Used only by selected targets.
659 DwarfAccelTypesSection = 0; // Used only by selected targets.
662 Triple::ArchType Arch = T.getArch();
663 // FIXME: Checking for Arch here to filter out bogus triples such as
664 // cellspu-apple-darwin. Perhaps we should fix in Triple?
665 if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
666 Arch == Triple::arm || Arch == Triple::thumb ||
667 Arch == Triple::ppc || Arch == Triple::ppc64 ||
668 Arch == Triple::UnknownArch) &&
669 (T.isOSDarwin() || T.getEnvironment() == Triple::MachO)) {
671 InitMachOMCObjectFileInfo(T);
672 } else if ((Arch == Triple::x86 || Arch == Triple::x86_64) &&
673 (T.getEnvironment() != Triple::ELF) &&
674 (T.getOS() == Triple::MinGW32 || T.getOS() == Triple::Cygwin ||
675 T.getOS() == Triple::Win32)) {
677 InitCOFFMCObjectFileInfo(T);
680 InitELFMCObjectFileInfo(T);
684 void MCObjectFileInfo::InitEHFrameSection() {
687 Ctx->getMachOSection("__TEXT", "__eh_frame",
688 MCSectionMachO::S_COALESCED |
689 MCSectionMachO::S_ATTR_NO_TOC |
690 MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
691 MCSectionMachO::S_ATTR_LIVE_SUPPORT,
692 SectionKind::getReadOnly());
693 else if (Env == IsELF)
695 Ctx->getELFSection(".eh_frame", EHSectionType,
697 SectionKind::getDataRel());
700 Ctx->getCOFFSection(".eh_frame",
701 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
702 COFF::IMAGE_SCN_MEM_READ |
703 COFF::IMAGE_SCN_MEM_WRITE,
704 SectionKind::getDataRel());