Gitiles
Code Review Sign In
gerrit-public.fairphone.software / toolchain / llvm-project / e85b06d65f695c576df1e529ee37cb15e6902401 / . / llvm / lib / MC / MCObjectFileInfo.cpp
blob: 4eebda6d3ed622d66fb1c15f72b8cdea69046f1c [file] [log] [blame]
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]1//===-- MCObjectFileInfo.cpp - Object File Information --------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/MC/MCObjectFileInfo.h"
11#include "llvm/ADT/StringExtras.h"
12#include "llvm/ADT/Triple.h"
13#include "llvm/BinaryFormat/COFF.h"
14#include "llvm/BinaryFormat/ELF.h"
15#include "llvm/MC/MCAsmInfo.h"
16#include "llvm/MC/MCContext.h"
17#include "llvm/MC/MCSection.h"
18#include "llvm/MC/MCSectionCOFF.h"
19#include "llvm/MC/MCSectionELF.h"
20#include "llvm/MC/MCSectionMachO.h"
21#include "llvm/MC/MCSectionWasm.h"
22
23using namespace llvm;
24
25static bool useCompactUnwind(const Triple &T) {
26 // Only on darwin.
27 if (!T.isOSDarwin())
28 return false;
29
30 // aarch64 always has it.
31 if (T.getArch() == Triple::aarch64)
32 return true;
33
34 // armv7k always has it.
35 if (T.isWatchABI())
36 return true;
37
38 // Use it on newer version of OS X.
39 if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
40 return true;
41
42 // And the iOS simulator.
43 if (T.isiOS() &&
44 (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86))
45 return true;
46
47 return false;
48}
49
50void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
51 // MachO
52 SupportsWeakOmittedEHFrame = false;
53
54 EHFrameSection = Ctx->getMachOSection(
55 "__TEXT", "__eh_frame",
56 MachO::S_COALESCED | MachO::S_ATTR_NO_TOC |
57 MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT,
58 SectionKind::getReadOnly());
59
60 if (T.isOSDarwin() && T.getArch() == Triple::aarch64)
61 SupportsCompactUnwindWithoutEHFrame = true;
62
63 if (T.isWatchABI())
64 OmitDwarfIfHaveCompactUnwind = true;
65
66 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
67 | dwarf::DW_EH_PE_sdata4;
68 LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
69 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
70 dwarf::DW_EH_PE_sdata4;
71
72 // .comm doesn't support alignment before Leopard.
73 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
74 CommDirectiveSupportsAlignment = false;
75
76 TextSection // .text
77 = Ctx->getMachOSection("__TEXT", "__text",
78 MachO::S_ATTR_PURE_INSTRUCTIONS,
79 SectionKind::getText());
80 DataSection // .data
81 = Ctx->getMachOSection("__DATA", "__data", 0, SectionKind::getData());
82
83 // BSSSection might not be expected initialized on msvc.
84 BSSSection = nullptr;
85
86 TLSDataSection // .tdata
87 = Ctx->getMachOSection("__DATA", "__thread_data",
88 MachO::S_THREAD_LOCAL_REGULAR,
89 SectionKind::getData());
90 TLSBSSSection // .tbss
91 = Ctx->getMachOSection("__DATA", "__thread_bss",
92 MachO::S_THREAD_LOCAL_ZEROFILL,
93 SectionKind::getThreadBSS());
94
95 // TODO: Verify datarel below.
96 TLSTLVSection // .tlv
97 = Ctx->getMachOSection("__DATA", "__thread_vars",
98 MachO::S_THREAD_LOCAL_VARIABLES,
99 SectionKind::getData());
100
101 TLSThreadInitSection = Ctx->getMachOSection(
102 "__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
103 SectionKind::getData());
104
105 CStringSection // .cstring
106 = Ctx->getMachOSection("__TEXT", "__cstring",
107 MachO::S_CSTRING_LITERALS,
108 SectionKind::getMergeable1ByteCString());
109 UStringSection
110 = Ctx->getMachOSection("__TEXT","__ustring", 0,
111 SectionKind::getMergeable2ByteCString());
112 FourByteConstantSection // .literal4
113 = Ctx->getMachOSection("__TEXT", "__literal4",
114 MachO::S_4BYTE_LITERALS,
115 SectionKind::getMergeableConst4());
116 EightByteConstantSection // .literal8
117 = Ctx->getMachOSection("__TEXT", "__literal8",
118 MachO::S_8BYTE_LITERALS,
119 SectionKind::getMergeableConst8());
120
121 SixteenByteConstantSection // .literal16
122 = Ctx->getMachOSection("__TEXT", "__literal16",
123 MachO::S_16BYTE_LITERALS,
124 SectionKind::getMergeableConst16());
125
126 ReadOnlySection // .const
127 = Ctx->getMachOSection("__TEXT", "__const", 0,
128 SectionKind::getReadOnly());
129
130 // If the target is not powerpc, map the coal sections to the non-coal
131 // sections.
132 //
133 // "__TEXT/__textcoal_nt" => section "__TEXT/__text"
134 // "__TEXT/__const_coal" => section "__TEXT/__const"
135 // "__DATA/__datacoal_nt" => section "__DATA/__data"
136 Triple::ArchType ArchTy = T.getArch();
137
138 if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) {
139 TextCoalSection
140 = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
141 MachO::S_COALESCED |
142 MachO::S_ATTR_PURE_INSTRUCTIONS,
143 SectionKind::getText());
144 ConstTextCoalSection
145 = Ctx->getMachOSection("__TEXT", "__const_coal",
146 MachO::S_COALESCED,
147 SectionKind::getReadOnly());
148 DataCoalSection = Ctx->getMachOSection(
149 "__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData());
150 } else {
151 TextCoalSection = TextSection;
152 ConstTextCoalSection = ReadOnlySection;
153 DataCoalSection = DataSection;
154 }
155
156 ConstDataSection // .const_data
157 = Ctx->getMachOSection("__DATA", "__const", 0,
158 SectionKind::getReadOnlyWithRel());
159 DataCommonSection
160 = Ctx->getMachOSection("__DATA","__common",
161 MachO::S_ZEROFILL,
162 SectionKind::getBSS());
163 DataBSSSection
164 = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL,
165 SectionKind::getBSS());
166
167
168 LazySymbolPointerSection
169 = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
170 MachO::S_LAZY_SYMBOL_POINTERS,
171 SectionKind::getMetadata());
172 NonLazySymbolPointerSection
173 = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
174 MachO::S_NON_LAZY_SYMBOL_POINTERS,
175 SectionKind::getMetadata());
176
177 ThreadLocalPointerSection
178 = Ctx->getMachOSection("__DATA", "__thread_ptr",
179 MachO::S_THREAD_LOCAL_VARIABLE_POINTERS,
180 SectionKind::getMetadata());
181
182 // Exception Handling.
183 LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
184 SectionKind::getReadOnlyWithRel());
185
186 COFFDebugSymbolsSection = nullptr;
187 COFFDebugTypesSection = nullptr;
Zachary Turner048f8f92017-12-13 22:33:58 +0000[diff] [blame]188 COFFGlobalTypeHashesSection = nullptr;
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]189
190 if (useCompactUnwind(T)) {
191 CompactUnwindSection =
192 Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG,
193 SectionKind::getReadOnly());
194
195 if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
196 CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF
197 else if (T.getArch() == Triple::aarch64)
198 CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF
199 else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)
200 CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF
201 }
202
203 // Debug Information.
204 DwarfAccelNamesSection =
205 Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG,
206 SectionKind::getMetadata(), "names_begin");
207 DwarfAccelObjCSection =
208 Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG,
209 SectionKind::getMetadata(), "objc_begin");
210 // 16 character section limit...
211 DwarfAccelNamespaceSection =
212 Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG,
213 SectionKind::getMetadata(), "namespac_begin");
214 DwarfAccelTypesSection =
215 Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG,
216 SectionKind::getMetadata(), "types_begin");
217
218 DwarfSwiftASTSection =
219 Ctx->getMachOSection("__DWARF", "__swift_ast", MachO::S_ATTR_DEBUG,
220 SectionKind::getMetadata());
221
222 DwarfAbbrevSection =
223 Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG,
224 SectionKind::getMetadata(), "section_abbrev");
225 DwarfInfoSection =
226 Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG,
227 SectionKind::getMetadata(), "section_info");
228 DwarfLineSection =
229 Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG,
230 SectionKind::getMetadata(), "section_line");
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]231 DwarfLineStrSection =
232 Ctx->getMachOSection("__DWARF", "__debug_line_str", MachO::S_ATTR_DEBUG,
233 SectionKind::getMetadata(), "section_line_str");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]234 DwarfFrameSection =
235 Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG,
236 SectionKind::getMetadata());
237 DwarfPubNamesSection =
238 Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG,
239 SectionKind::getMetadata());
240 DwarfPubTypesSection =
241 Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG,
242 SectionKind::getMetadata());
243 DwarfGnuPubNamesSection =
244 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG,
245 SectionKind::getMetadata());
246 DwarfGnuPubTypesSection =
247 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG,
248 SectionKind::getMetadata());
249 DwarfStrSection =
250 Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG,
251 SectionKind::getMetadata(), "info_string");
252 DwarfStrOffSection =
253 Ctx->getMachOSection("__DWARF", "__debug_str_offs", MachO::S_ATTR_DEBUG,
254 SectionKind::getMetadata(), "section_str_off");
255 DwarfLocSection =
256 Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG,
257 SectionKind::getMetadata(), "section_debug_loc");
258 DwarfARangesSection =
259 Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG,
260 SectionKind::getMetadata());
261 DwarfRangesSection =
262 Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG,
263 SectionKind::getMetadata(), "debug_range");
264 DwarfMacinfoSection =
265 Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG,
266 SectionKind::getMetadata(), "debug_macinfo");
267 DwarfDebugInlineSection =
268 Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG,
269 SectionKind::getMetadata());
270 DwarfCUIndexSection =
271 Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG,
272 SectionKind::getMetadata());
273 DwarfTUIndexSection =
274 Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG,
275 SectionKind::getMetadata());
276 StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps",
277 0, SectionKind::getMetadata());
278
279 FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps",
280 0, SectionKind::getMetadata());
281
282 TLSExtraDataSection = TLSTLVSection;
283}
284
285void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) {
286 switch (T.getArch()) {
287 case Triple::mips:
288 case Triple::mipsel:
289 FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
290 break;
291 case Triple::mips64:
292 case Triple::mips64el:
293 FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
294 break;
295 case Triple::x86_64:
296 FDECFIEncoding = dwarf::DW_EH_PE_pcrel |
297 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
298 break;
299 case Triple::bpfel:
300 case Triple::bpfeb:
301 FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
302 break;
303 default:
304 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
305 break;
306 }
307
308 switch (T.getArch()) {
309 case Triple::arm:
310 case Triple::armeb:
311 case Triple::thumb:
312 case Triple::thumbeb:
313 if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)
314 break;
315 // Fallthrough if not using EHABI
316 LLVM_FALLTHROUGH;
317 case Triple::ppc:
318 case Triple::x86:
319 PersonalityEncoding = PositionIndependent
320 ? dwarf::DW_EH_PE_indirect |
321 dwarf::DW_EH_PE_pcrel |
322 dwarf::DW_EH_PE_sdata4
323 : dwarf::DW_EH_PE_absptr;
324 LSDAEncoding = PositionIndependent
325 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
326 : dwarf::DW_EH_PE_absptr;
327 TTypeEncoding = PositionIndependent
328 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
329 dwarf::DW_EH_PE_sdata4
330 : dwarf::DW_EH_PE_absptr;
331 break;
332 case Triple::x86_64:
333 if (PositionIndependent) {
334 PersonalityEncoding =
335 dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
336 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
337 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
338 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
339 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
340 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
341 } else {
342 PersonalityEncoding =
343 Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
344 LSDAEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
345 TTypeEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
346 }
347 break;
348 case Triple::hexagon:
349 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
350 LSDAEncoding = dwarf::DW_EH_PE_absptr;
351 FDECFIEncoding = dwarf::DW_EH_PE_absptr;
352 TTypeEncoding = dwarf::DW_EH_PE_absptr;
353 if (PositionIndependent) {
354 PersonalityEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
355 LSDAEncoding |= dwarf::DW_EH_PE_pcrel;
356 FDECFIEncoding |= dwarf::DW_EH_PE_pcrel;
357 TTypeEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
358 }
359 break;
360 case Triple::aarch64:
361 case Triple::aarch64_be:
362 // The small model guarantees static code/data size < 4GB, but not where it
363 // will be in memory. Most of these could end up >2GB away so even a signed
364 // pc-relative 32-bit address is insufficient, theoretically.
365 if (PositionIndependent) {
366 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
367 dwarf::DW_EH_PE_sdata8;
368 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
369 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
370 dwarf::DW_EH_PE_sdata8;
371 } else {
372 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
373 LSDAEncoding = dwarf::DW_EH_PE_absptr;
374 TTypeEncoding = dwarf::DW_EH_PE_absptr;
375 }
376 break;
377 case Triple::lanai:
378 LSDAEncoding = dwarf::DW_EH_PE_absptr;
379 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
380 TTypeEncoding = dwarf::DW_EH_PE_absptr;
381 break;
382 case Triple::mips:
383 case Triple::mipsel:
384 case Triple::mips64:
385 case Triple::mips64el:
386 // MIPS uses indirect pointer to refer personality functions and types, so
387 // that the eh_frame section can be read-only. DW.ref.personality will be
388 // generated for relocation.
389 PersonalityEncoding = dwarf::DW_EH_PE_indirect;
390 // FIXME: The N64 ABI probably ought to use DW_EH_PE_sdata8 but we can't
391 // identify N64 from just a triple.
392 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
393 dwarf::DW_EH_PE_sdata4;
394 // We don't support PC-relative LSDA references in GAS so we use the default
395 // DW_EH_PE_absptr for those.
396
397 // FreeBSD must be explicit about the data size and using pcrel since it's
398 // assembler/linker won't do the automatic conversion that the Linux tools
399 // do.
400 if (T.isOSFreeBSD()) {
401 PersonalityEncoding |= dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
402 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
403 }
404 break;
405 case Triple::ppc64:
406 case Triple::ppc64le:
407 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
408 dwarf::DW_EH_PE_udata8;
409 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
410 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
411 dwarf::DW_EH_PE_udata8;
412 break;
413 case Triple::sparcel:
414 case Triple::sparc:
415 if (PositionIndependent) {
416 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
417 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
418 dwarf::DW_EH_PE_sdata4;
419 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
420 dwarf::DW_EH_PE_sdata4;
421 } else {
422 LSDAEncoding = dwarf::DW_EH_PE_absptr;
423 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
424 TTypeEncoding = dwarf::DW_EH_PE_absptr;
425 }
426 break;
427 case Triple::sparcv9:
428 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
429 if (PositionIndependent) {
430 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
431 dwarf::DW_EH_PE_sdata4;
432 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
433 dwarf::DW_EH_PE_sdata4;
434 } else {
435 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
436 TTypeEncoding = dwarf::DW_EH_PE_absptr;
437 }
438 break;
439 case Triple::systemz:
440 // All currently-defined code models guarantee that 4-byte PC-relative
441 // values will be in range.
442 if (PositionIndependent) {
443 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
444 dwarf::DW_EH_PE_sdata4;
445 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
446 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
447 dwarf::DW_EH_PE_sdata4;
448 } else {
449 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
450 LSDAEncoding = dwarf::DW_EH_PE_absptr;
451 TTypeEncoding = dwarf::DW_EH_PE_absptr;
452 }
453 break;
454 default:
455 break;
456 }
457
458 unsigned EHSectionType = T.getArch() == Triple::x86_64
459 ? ELF::SHT_X86_64_UNWIND
460 : ELF::SHT_PROGBITS;
461
462 // Solaris requires different flags for .eh_frame to seemingly every other
463 // platform.
464 unsigned EHSectionFlags = ELF::SHF_ALLOC;
465 if (T.isOSSolaris() && T.getArch() != Triple::x86_64)
466 EHSectionFlags |= ELF::SHF_WRITE;
467
468 // ELF
469 BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
470 ELF::SHF_WRITE | ELF::SHF_ALLOC);
471
472 TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
473 ELF::SHF_EXECINSTR | ELF::SHF_ALLOC);
474
475 DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
476 ELF::SHF_WRITE | ELF::SHF_ALLOC);
477
478 ReadOnlySection =
479 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
480
481 TLSDataSection =
482 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
483 ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
484
485 TLSBSSSection = Ctx->getELFSection(
486 ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
487
488 DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
489 ELF::SHF_ALLOC | ELF::SHF_WRITE);
490
491 MergeableConst4Section =
492 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
493 ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");
494
495 MergeableConst8Section =
496 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
497 ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, "");
498
499 MergeableConst16Section =
500 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
501 ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, "");
502
503 MergeableConst32Section =
504 Ctx->getELFSection(".rodata.cst32", ELF::SHT_PROGBITS,
505 ELF::SHF_ALLOC | ELF::SHF_MERGE, 32, "");
506
507 // Exception Handling Sections.
508
509 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
510 // it contains relocatable pointers. In PIC mode, this is probably a big
511 // runtime hit for C++ apps. Either the contents of the LSDA need to be
512 // adjusted or this should be a data section.
513 LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
514 ELF::SHF_ALLOC);
515
516 COFFDebugSymbolsSection = nullptr;
517 COFFDebugTypesSection = nullptr;
518
519 unsigned DebugSecType = ELF::SHT_PROGBITS;
520
521 // MIPS .debug_* sections should have SHT_MIPS_DWARF section type
522 // to distinguish among sections contain DWARF and ECOFF debug formats.
523 // Sections with ECOFF debug format are obsoleted and marked by SHT_PROGBITS.
524 if (T.getArch() == Triple::mips || T.getArch() == Triple::mipsel ||
525 T.getArch() == Triple::mips64 || T.getArch() == Triple::mips64el)
526 DebugSecType = ELF::SHT_MIPS_DWARF;
527
528 // Debug Info Sections.
529 DwarfAbbrevSection =
530 Ctx->getELFSection(".debug_abbrev", DebugSecType, 0);
531 DwarfInfoSection = Ctx->getELFSection(".debug_info", DebugSecType, 0);
532 DwarfLineSection = Ctx->getELFSection(".debug_line", DebugSecType, 0);
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]533 DwarfLineStrSection =
534 Ctx->getELFSection(".debug_line_str", DebugSecType,
535 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]536 DwarfFrameSection = Ctx->getELFSection(".debug_frame", DebugSecType, 0);
537 DwarfPubNamesSection =
538 Ctx->getELFSection(".debug_pubnames", DebugSecType, 0);
539 DwarfPubTypesSection =
540 Ctx->getELFSection(".debug_pubtypes", DebugSecType, 0);
541 DwarfGnuPubNamesSection =
542 Ctx->getELFSection(".debug_gnu_pubnames", DebugSecType, 0);
543 DwarfGnuPubTypesSection =
544 Ctx->getELFSection(".debug_gnu_pubtypes", DebugSecType, 0);
545 DwarfStrSection =
546 Ctx->getELFSection(".debug_str", DebugSecType,
547 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
548 DwarfLocSection = Ctx->getELFSection(".debug_loc", DebugSecType, 0);
549 DwarfARangesSection =
550 Ctx->getELFSection(".debug_aranges", DebugSecType, 0);
551 DwarfRangesSection =
552 Ctx->getELFSection(".debug_ranges", DebugSecType, 0);
553 DwarfMacinfoSection =
554 Ctx->getELFSection(".debug_macinfo", DebugSecType, 0);
555
556 // DWARF5 Experimental Debug Info
557
558 // Accelerator Tables
559 DwarfAccelNamesSection =
560 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0);
561 DwarfAccelObjCSection =
562 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0);
563 DwarfAccelNamespaceSection =
564 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0);
565 DwarfAccelTypesSection =
566 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0);
567
568 // String Offset and Address Sections
569 DwarfStrOffSection =
570 Ctx->getELFSection(".debug_str_offsets", DebugSecType, 0);
571 DwarfAddrSection = Ctx->getELFSection(".debug_addr", DebugSecType, 0);
572
573 // Fission Sections
574 DwarfInfoDWOSection =
575 Ctx->getELFSection(".debug_info.dwo", DebugSecType, 0);
576 DwarfTypesDWOSection =
577 Ctx->getELFSection(".debug_types.dwo", DebugSecType, 0);
578 DwarfAbbrevDWOSection =
579 Ctx->getELFSection(".debug_abbrev.dwo", DebugSecType, 0);
580 DwarfStrDWOSection =
581 Ctx->getELFSection(".debug_str.dwo", DebugSecType,
582 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
583 DwarfLineDWOSection =
584 Ctx->getELFSection(".debug_line.dwo", DebugSecType, 0);
585 DwarfLocDWOSection =
586 Ctx->getELFSection(".debug_loc.dwo", DebugSecType, 0);
587 DwarfStrOffDWOSection =
588 Ctx->getELFSection(".debug_str_offsets.dwo", DebugSecType, 0);
589
590 // DWP Sections
591 DwarfCUIndexSection =
592 Ctx->getELFSection(".debug_cu_index", DebugSecType, 0);
593 DwarfTUIndexSection =
594 Ctx->getELFSection(".debug_tu_index", DebugSecType, 0);
595
596 StackMapSection =
597 Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
598
599 FaultMapSection =
600 Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
601
602 EHFrameSection =
603 Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags);
Sean Evesona6bcd532017-11-30 13:05:14 +0000[diff] [blame]604
605 StackSizesSection = Ctx->getELFSection(".stack_sizes", ELF::SHT_PROGBITS, 0);
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]606}
607
608void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
609 EHFrameSection = Ctx->getCOFFSection(
610 ".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
611 COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
612 SectionKind::getData());
613
614 // Set the `IMAGE_SCN_MEM_16BIT` flag when compiling for thumb mode. This is
615 // used to indicate to the linker that the text segment contains thumb instructions
616 // and to set the ISA selection bit for calls accordingly.
617 const bool IsThumb = T.getArch() == Triple::thumb;
618
619 CommDirectiveSupportsAlignment = true;
620
621 // COFF
622 BSSSection = Ctx->getCOFFSection(
623 ".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
624 COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
625 SectionKind::getBSS());
626 TextSection = Ctx->getCOFFSection(
627 ".text",
628 (IsThumb ? COFF::IMAGE_SCN_MEM_16BIT : (COFF::SectionCharacteristics)0) |
629 COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE |
630 COFF::IMAGE_SCN_MEM_READ,
631 SectionKind::getText());
632 DataSection = Ctx->getCOFFSection(
633 ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
634 COFF::IMAGE_SCN_MEM_WRITE,
635 SectionKind::getData());
636 ReadOnlySection = Ctx->getCOFFSection(
637 ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
638 SectionKind::getReadOnly());
639
640 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
641 // though it contains relocatable pointers. In PIC mode, this is probably a
642 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
643 // adjusted or this should be a data section.
644 if (T.getArch() == Triple::x86_64) {
645 // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
646 LSDASection = nullptr;
647 } else {
648 LSDASection = Ctx->getCOFFSection(".gcc_except_table",
649 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
650 COFF::IMAGE_SCN_MEM_READ,
651 SectionKind::getReadOnly());
652 }
653
654 // Debug info.
655 COFFDebugSymbolsSection =
656 Ctx->getCOFFSection(".debug$S", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
657 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
658 COFF::IMAGE_SCN_MEM_READ),
659 SectionKind::getMetadata());
660 COFFDebugTypesSection =
661 Ctx->getCOFFSection(".debug$T", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
662 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
663 COFF::IMAGE_SCN_MEM_READ),
664 SectionKind::getMetadata());
Zachary Turner048f8f92017-12-13 22:33:58 +0000[diff] [blame]665 COFFGlobalTypeHashesSection = Ctx->getCOFFSection(
666 ".debug$H",
667 (COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
668 COFF::IMAGE_SCN_MEM_READ),
669 SectionKind::getMetadata());
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]670
671 DwarfAbbrevSection = Ctx->getCOFFSection(
672 ".debug_abbrev",
673 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
674 COFF::IMAGE_SCN_MEM_READ,
675 SectionKind::getMetadata(), "section_abbrev");
676 DwarfInfoSection = Ctx->getCOFFSection(
677 ".debug_info",
678 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
679 COFF::IMAGE_SCN_MEM_READ,
680 SectionKind::getMetadata(), "section_info");
681 DwarfLineSection = Ctx->getCOFFSection(
682 ".debug_line",
683 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
684 COFF::IMAGE_SCN_MEM_READ,
685 SectionKind::getMetadata(), "section_line");
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]686 DwarfLineStrSection = Ctx->getCOFFSection(
687 ".debug_line_str",
688 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
689 COFF::IMAGE_SCN_MEM_READ,
690 SectionKind::getMetadata(), "section_line_str");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]691 DwarfFrameSection = Ctx->getCOFFSection(
692 ".debug_frame",
693 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
694 COFF::IMAGE_SCN_MEM_READ,
695 SectionKind::getMetadata());
696 DwarfPubNamesSection = Ctx->getCOFFSection(
697 ".debug_pubnames",
698 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
699 COFF::IMAGE_SCN_MEM_READ,
700 SectionKind::getMetadata());
701 DwarfPubTypesSection = Ctx->getCOFFSection(
702 ".debug_pubtypes",
703 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
704 COFF::IMAGE_SCN_MEM_READ,
705 SectionKind::getMetadata());
706 DwarfGnuPubNamesSection = Ctx->getCOFFSection(
707 ".debug_gnu_pubnames",
708 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
709 COFF::IMAGE_SCN_MEM_READ,
710 SectionKind::getMetadata());
711 DwarfGnuPubTypesSection = Ctx->getCOFFSection(
712 ".debug_gnu_pubtypes",
713 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
714 COFF::IMAGE_SCN_MEM_READ,
715 SectionKind::getMetadata());
716 DwarfStrSection = Ctx->getCOFFSection(
717 ".debug_str",
718 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
719 COFF::IMAGE_SCN_MEM_READ,
720 SectionKind::getMetadata(), "info_string");
721 DwarfStrOffSection = Ctx->getCOFFSection(
722 ".debug_str_offsets",
723 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
724 COFF::IMAGE_SCN_MEM_READ,
725 SectionKind::getMetadata(), "section_str_off");
726 DwarfLocSection = Ctx->getCOFFSection(
727 ".debug_loc",
728 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
729 COFF::IMAGE_SCN_MEM_READ,
730 SectionKind::getMetadata(), "section_debug_loc");
731 DwarfARangesSection = Ctx->getCOFFSection(
732 ".debug_aranges",
733 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
734 COFF::IMAGE_SCN_MEM_READ,
735 SectionKind::getMetadata());
736 DwarfRangesSection = Ctx->getCOFFSection(
737 ".debug_ranges",
738 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
739 COFF::IMAGE_SCN_MEM_READ,
740 SectionKind::getMetadata(), "debug_range");
741 DwarfMacinfoSection = Ctx->getCOFFSection(
742 ".debug_macinfo",
743 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
744 COFF::IMAGE_SCN_MEM_READ,
745 SectionKind::getMetadata(), "debug_macinfo");
746 DwarfInfoDWOSection = Ctx->getCOFFSection(
747 ".debug_info.dwo",
748 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
749 COFF::IMAGE_SCN_MEM_READ,
750 SectionKind::getMetadata(), "section_info_dwo");
751 DwarfTypesDWOSection = Ctx->getCOFFSection(
752 ".debug_types.dwo",
753 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
754 COFF::IMAGE_SCN_MEM_READ,
755 SectionKind::getMetadata(), "section_types_dwo");
756 DwarfAbbrevDWOSection = Ctx->getCOFFSection(
757 ".debug_abbrev.dwo",
758 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
759 COFF::IMAGE_SCN_MEM_READ,
760 SectionKind::getMetadata(), "section_abbrev_dwo");
761 DwarfStrDWOSection = Ctx->getCOFFSection(
762 ".debug_str.dwo",
763 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
764 COFF::IMAGE_SCN_MEM_READ,
765 SectionKind::getMetadata(), "skel_string");
766 DwarfLineDWOSection = Ctx->getCOFFSection(
767 ".debug_line.dwo",
768 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
769 COFF::IMAGE_SCN_MEM_READ,
770 SectionKind::getMetadata());
771 DwarfLocDWOSection = Ctx->getCOFFSection(
772 ".debug_loc.dwo",
773 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
774 COFF::IMAGE_SCN_MEM_READ,
775 SectionKind::getMetadata(), "skel_loc");
776 DwarfStrOffDWOSection = Ctx->getCOFFSection(
777 ".debug_str_offsets.dwo",
778 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
779 COFF::IMAGE_SCN_MEM_READ,
780 SectionKind::getMetadata(), "section_str_off_dwo");
781 DwarfAddrSection = Ctx->getCOFFSection(
782 ".debug_addr",
783 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
784 COFF::IMAGE_SCN_MEM_READ,
785 SectionKind::getMetadata(), "addr_sec");
786 DwarfCUIndexSection = Ctx->getCOFFSection(
787 ".debug_cu_index",
788 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
789 COFF::IMAGE_SCN_MEM_READ,
790 SectionKind::getMetadata());
791 DwarfTUIndexSection = Ctx->getCOFFSection(
792 ".debug_tu_index",
793 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
794 COFF::IMAGE_SCN_MEM_READ,
795 SectionKind::getMetadata());
796 DwarfAccelNamesSection = Ctx->getCOFFSection(
797 ".apple_names",
798 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
799 COFF::IMAGE_SCN_MEM_READ,
800 SectionKind::getMetadata(), "names_begin");
801 DwarfAccelNamespaceSection = Ctx->getCOFFSection(
802 ".apple_namespaces",
803 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
804 COFF::IMAGE_SCN_MEM_READ,
805 SectionKind::getMetadata(), "namespac_begin");
806 DwarfAccelTypesSection = Ctx->getCOFFSection(
807 ".apple_types",
808 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
809 COFF::IMAGE_SCN_MEM_READ,
810 SectionKind::getMetadata(), "types_begin");
811 DwarfAccelObjCSection = Ctx->getCOFFSection(
812 ".apple_objc",
813 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
814 COFF::IMAGE_SCN_MEM_READ,
815 SectionKind::getMetadata(), "objc_begin");
816
817 DrectveSection = Ctx->getCOFFSection(
818 ".drectve", COFF::IMAGE_SCN_LNK_INFO | COFF::IMAGE_SCN_LNK_REMOVE,
819 SectionKind::getMetadata());
820
821 PDataSection = Ctx->getCOFFSection(
822 ".pdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
823 SectionKind::getData());
824
825 XDataSection = Ctx->getCOFFSection(
826 ".xdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
827 SectionKind::getData());
828
829 SXDataSection = Ctx->getCOFFSection(".sxdata", COFF::IMAGE_SCN_LNK_INFO,
830 SectionKind::getMetadata());
831
Adrian McCarthydb2736d2018-01-09 23:49:30 +0000[diff] [blame]832 GFIDsSection = Ctx->getCOFFSection(".gfids$y",
833 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
834 COFF::IMAGE_SCN_MEM_READ,
835 SectionKind::getMetadata());
836
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]837 TLSDataSection = Ctx->getCOFFSection(
838 ".tls$", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
839 COFF::IMAGE_SCN_MEM_WRITE,
840 SectionKind::getData());
841
842 StackMapSection = Ctx->getCOFFSection(".llvm_stackmaps",
843 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
844 COFF::IMAGE_SCN_MEM_READ,
845 SectionKind::getReadOnly());
846}
847
848void MCObjectFileInfo::initWasmMCObjectFileInfo(const Triple &T) {
849 // TODO: Set the section types and flags.
850 TextSection = Ctx->getWasmSection(".text", SectionKind::getText());
851 DataSection = Ctx->getWasmSection(".data", SectionKind::getData());
852
853 // TODO: Set the section types and flags.
854 DwarfLineSection = Ctx->getWasmSection(".debug_line", SectionKind::getMetadata());
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]855 DwarfLineStrSection =
856 Ctx->getWasmSection(".debug_line_str", SectionKind::getMetadata());
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]857 DwarfStrSection = Ctx->getWasmSection(".debug_str", SectionKind::getMetadata());
858 DwarfLocSection = Ctx->getWasmSection(".debug_loc", SectionKind::getMetadata());
859 DwarfAbbrevSection = Ctx->getWasmSection(".debug_abbrev", SectionKind::getMetadata(), "section_abbrev");
860 DwarfARangesSection = Ctx->getWasmSection(".debug_aranges", SectionKind::getMetadata());
861 DwarfRangesSection = Ctx->getWasmSection(".debug_ranges", SectionKind::getMetadata(), "debug_range");
862 DwarfMacinfoSection = Ctx->getWasmSection(".debug_macinfo", SectionKind::getMetadata(), "debug_macinfo");
863 DwarfAddrSection = Ctx->getWasmSection(".debug_addr", SectionKind::getMetadata());
864 DwarfCUIndexSection = Ctx->getWasmSection(".debug_cu_index", SectionKind::getMetadata());
865 DwarfTUIndexSection = Ctx->getWasmSection(".debug_tu_index", SectionKind::getMetadata());
866 DwarfInfoSection = Ctx->getWasmSection(".debug_info", SectionKind::getMetadata(), "section_info");
867 DwarfFrameSection = Ctx->getWasmSection(".debug_frame", SectionKind::getMetadata());
868 DwarfPubNamesSection = Ctx->getWasmSection(".debug_pubnames", SectionKind::getMetadata());
869 DwarfPubTypesSection = Ctx->getWasmSection(".debug_pubtypes", SectionKind::getMetadata());
870
871 // TODO: Define more sections.
872}
873
874void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
875 MCContext &ctx,
876 bool LargeCodeModel) {
877 PositionIndependent = PIC;
878 Ctx = &ctx;
879
880 // Common.
881 CommDirectiveSupportsAlignment = true;
882 SupportsWeakOmittedEHFrame = true;
883 SupportsCompactUnwindWithoutEHFrame = false;
884 OmitDwarfIfHaveCompactUnwind = false;
885
886 PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =
887 dwarf::DW_EH_PE_absptr;
888
889 CompactUnwindDwarfEHFrameOnly = 0;
890
891 EHFrameSection = nullptr; // Created on demand.
892 CompactUnwindSection = nullptr; // Used only by selected targets.
893 DwarfAccelNamesSection = nullptr; // Used only by selected targets.
894 DwarfAccelObjCSection = nullptr; // Used only by selected targets.
895 DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
896 DwarfAccelTypesSection = nullptr; // Used only by selected targets.
897
898 TT = TheTriple;
899
900 switch (TT.getObjectFormat()) {
901 case Triple::MachO:
902 Env = IsMachO;
903 initMachOMCObjectFileInfo(TT);
904 break;
905 case Triple::COFF:
906 if (!TT.isOSWindows())
907 report_fatal_error(
908 "Cannot initialize MC for non-Windows COFF object files.");
909
910 Env = IsCOFF;
911 initCOFFMCObjectFileInfo(TT);
912 break;
913 case Triple::ELF:
914 Env = IsELF;
915 initELFMCObjectFileInfo(TT, LargeCodeModel);
916 break;
917 case Triple::Wasm:
918 Env = IsWasm;
919 initWasmMCObjectFileInfo(TT);
920 break;
921 case Triple::UnknownObjectFormat:
922 report_fatal_error("Cannot initialize MC for unknown object file format.");
923 break;
924 }
925}
926
927MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
928 return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
929 0, utostr(Hash));
930}