Gitiles
Code Review Sign In
gerrit-public.fairphone.software / toolchain / llvm-project / 6088c23431239ff7653ec0acc74e97f4d2771834 / . / llvm / lib / MC / MCObjectFileInfo.cpp
blob: b154c98cf72d3b2cef07be34404173ad5779c2a2 [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.
Pavel Labath6088c232018-04-04 14:42:14 +0000[diff] [blame^]204 DwarfDebugNamesSection =
205 Ctx->getMachOSection("__DWARF", "__debug_names", MachO::S_ATTR_DEBUG,
206 SectionKind::getMetadata(), "debug_names_begin");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]207 DwarfAccelNamesSection =
208 Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG,
209 SectionKind::getMetadata(), "names_begin");
210 DwarfAccelObjCSection =
211 Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG,
212 SectionKind::getMetadata(), "objc_begin");
213 // 16 character section limit...
214 DwarfAccelNamespaceSection =
215 Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG,
216 SectionKind::getMetadata(), "namespac_begin");
217 DwarfAccelTypesSection =
218 Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG,
219 SectionKind::getMetadata(), "types_begin");
220
221 DwarfSwiftASTSection =
222 Ctx->getMachOSection("__DWARF", "__swift_ast", MachO::S_ATTR_DEBUG,
223 SectionKind::getMetadata());
224
225 DwarfAbbrevSection =
226 Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG,
227 SectionKind::getMetadata(), "section_abbrev");
228 DwarfInfoSection =
229 Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG,
230 SectionKind::getMetadata(), "section_info");
231 DwarfLineSection =
232 Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG,
233 SectionKind::getMetadata(), "section_line");
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]234 DwarfLineStrSection =
235 Ctx->getMachOSection("__DWARF", "__debug_line_str", MachO::S_ATTR_DEBUG,
236 SectionKind::getMetadata(), "section_line_str");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]237 DwarfFrameSection =
238 Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG,
239 SectionKind::getMetadata());
240 DwarfPubNamesSection =
241 Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG,
242 SectionKind::getMetadata());
243 DwarfPubTypesSection =
244 Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG,
245 SectionKind::getMetadata());
246 DwarfGnuPubNamesSection =
247 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG,
248 SectionKind::getMetadata());
249 DwarfGnuPubTypesSection =
250 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG,
251 SectionKind::getMetadata());
252 DwarfStrSection =
253 Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG,
254 SectionKind::getMetadata(), "info_string");
255 DwarfStrOffSection =
256 Ctx->getMachOSection("__DWARF", "__debug_str_offs", MachO::S_ATTR_DEBUG,
257 SectionKind::getMetadata(), "section_str_off");
258 DwarfLocSection =
259 Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG,
260 SectionKind::getMetadata(), "section_debug_loc");
261 DwarfARangesSection =
262 Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG,
263 SectionKind::getMetadata());
264 DwarfRangesSection =
265 Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG,
266 SectionKind::getMetadata(), "debug_range");
267 DwarfMacinfoSection =
268 Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG,
269 SectionKind::getMetadata(), "debug_macinfo");
270 DwarfDebugInlineSection =
271 Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG,
272 SectionKind::getMetadata());
273 DwarfCUIndexSection =
274 Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG,
275 SectionKind::getMetadata());
276 DwarfTUIndexSection =
277 Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG,
278 SectionKind::getMetadata());
279 StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps",
280 0, SectionKind::getMetadata());
281
282 FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps",
283 0, SectionKind::getMetadata());
284
285 TLSExtraDataSection = TLSTLVSection;
286}
287
288void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) {
289 switch (T.getArch()) {
290 case Triple::mips:
291 case Triple::mipsel:
292 FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
293 break;
294 case Triple::mips64:
295 case Triple::mips64el:
296 FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
297 break;
Eric Christopherfe6e6d92018-03-24 00:07:38 +0000[diff] [blame]298 case Triple::ppc64:
299 case Triple::ppc64le:
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]300 case Triple::x86_64:
301 FDECFIEncoding = dwarf::DW_EH_PE_pcrel |
302 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
303 break;
304 case Triple::bpfel:
305 case Triple::bpfeb:
306 FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
307 break;
308 default:
309 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
310 break;
311 }
312
313 switch (T.getArch()) {
314 case Triple::arm:
315 case Triple::armeb:
316 case Triple::thumb:
317 case Triple::thumbeb:
318 if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)
319 break;
320 // Fallthrough if not using EHABI
321 LLVM_FALLTHROUGH;
322 case Triple::ppc:
323 case Triple::x86:
324 PersonalityEncoding = PositionIndependent
325 ? dwarf::DW_EH_PE_indirect |
326 dwarf::DW_EH_PE_pcrel |
327 dwarf::DW_EH_PE_sdata4
328 : dwarf::DW_EH_PE_absptr;
329 LSDAEncoding = PositionIndependent
330 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
331 : dwarf::DW_EH_PE_absptr;
332 TTypeEncoding = PositionIndependent
333 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
334 dwarf::DW_EH_PE_sdata4
335 : dwarf::DW_EH_PE_absptr;
336 break;
337 case Triple::x86_64:
338 if (PositionIndependent) {
339 PersonalityEncoding =
340 dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
341 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
342 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
343 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
344 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
345 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
346 } else {
347 PersonalityEncoding =
348 Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
349 LSDAEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
350 TTypeEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
351 }
352 break;
353 case Triple::hexagon:
354 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
355 LSDAEncoding = dwarf::DW_EH_PE_absptr;
356 FDECFIEncoding = dwarf::DW_EH_PE_absptr;
357 TTypeEncoding = dwarf::DW_EH_PE_absptr;
358 if (PositionIndependent) {
359 PersonalityEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
360 LSDAEncoding |= dwarf::DW_EH_PE_pcrel;
361 FDECFIEncoding |= dwarf::DW_EH_PE_pcrel;
362 TTypeEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
363 }
364 break;
365 case Triple::aarch64:
366 case Triple::aarch64_be:
367 // The small model guarantees static code/data size < 4GB, but not where it
368 // will be in memory. Most of these could end up >2GB away so even a signed
369 // pc-relative 32-bit address is insufficient, theoretically.
370 if (PositionIndependent) {
371 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
372 dwarf::DW_EH_PE_sdata8;
373 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
374 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
375 dwarf::DW_EH_PE_sdata8;
376 } else {
377 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
378 LSDAEncoding = dwarf::DW_EH_PE_absptr;
379 TTypeEncoding = dwarf::DW_EH_PE_absptr;
380 }
381 break;
382 case Triple::lanai:
383 LSDAEncoding = dwarf::DW_EH_PE_absptr;
384 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
385 TTypeEncoding = dwarf::DW_EH_PE_absptr;
386 break;
387 case Triple::mips:
388 case Triple::mipsel:
389 case Triple::mips64:
390 case Triple::mips64el:
391 // MIPS uses indirect pointer to refer personality functions and types, so
392 // that the eh_frame section can be read-only. DW.ref.personality will be
393 // generated for relocation.
394 PersonalityEncoding = dwarf::DW_EH_PE_indirect;
395 // FIXME: The N64 ABI probably ought to use DW_EH_PE_sdata8 but we can't
396 // identify N64 from just a triple.
397 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
398 dwarf::DW_EH_PE_sdata4;
399 // We don't support PC-relative LSDA references in GAS so we use the default
400 // DW_EH_PE_absptr for those.
401
402 // FreeBSD must be explicit about the data size and using pcrel since it's
403 // assembler/linker won't do the automatic conversion that the Linux tools
404 // do.
405 if (T.isOSFreeBSD()) {
406 PersonalityEncoding |= dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
407 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
408 }
409 break;
410 case Triple::ppc64:
411 case Triple::ppc64le:
412 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
413 dwarf::DW_EH_PE_udata8;
414 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
415 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
416 dwarf::DW_EH_PE_udata8;
417 break;
418 case Triple::sparcel:
419 case Triple::sparc:
420 if (PositionIndependent) {
421 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
422 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
423 dwarf::DW_EH_PE_sdata4;
424 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
425 dwarf::DW_EH_PE_sdata4;
426 } else {
427 LSDAEncoding = dwarf::DW_EH_PE_absptr;
428 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
429 TTypeEncoding = dwarf::DW_EH_PE_absptr;
430 }
431 break;
432 case Triple::sparcv9:
433 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
434 if (PositionIndependent) {
435 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
436 dwarf::DW_EH_PE_sdata4;
437 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
438 dwarf::DW_EH_PE_sdata4;
439 } else {
440 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
441 TTypeEncoding = dwarf::DW_EH_PE_absptr;
442 }
443 break;
444 case Triple::systemz:
445 // All currently-defined code models guarantee that 4-byte PC-relative
446 // values will be in range.
447 if (PositionIndependent) {
448 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
449 dwarf::DW_EH_PE_sdata4;
450 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
451 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
452 dwarf::DW_EH_PE_sdata4;
453 } else {
454 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
455 LSDAEncoding = dwarf::DW_EH_PE_absptr;
456 TTypeEncoding = dwarf::DW_EH_PE_absptr;
457 }
458 break;
459 default:
460 break;
461 }
462
463 unsigned EHSectionType = T.getArch() == Triple::x86_64
464 ? ELF::SHT_X86_64_UNWIND
465 : ELF::SHT_PROGBITS;
466
467 // Solaris requires different flags for .eh_frame to seemingly every other
468 // platform.
469 unsigned EHSectionFlags = ELF::SHF_ALLOC;
470 if (T.isOSSolaris() && T.getArch() != Triple::x86_64)
471 EHSectionFlags |= ELF::SHF_WRITE;
472
473 // ELF
474 BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
475 ELF::SHF_WRITE | ELF::SHF_ALLOC);
476
477 TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
478 ELF::SHF_EXECINSTR | ELF::SHF_ALLOC);
479
480 DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
481 ELF::SHF_WRITE | ELF::SHF_ALLOC);
482
483 ReadOnlySection =
484 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
485
486 TLSDataSection =
487 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
488 ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
489
490 TLSBSSSection = Ctx->getELFSection(
491 ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
492
493 DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
494 ELF::SHF_ALLOC | ELF::SHF_WRITE);
495
496 MergeableConst4Section =
497 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
498 ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");
499
500 MergeableConst8Section =
501 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
502 ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, "");
503
504 MergeableConst16Section =
505 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
506 ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, "");
507
508 MergeableConst32Section =
509 Ctx->getELFSection(".rodata.cst32", ELF::SHT_PROGBITS,
510 ELF::SHF_ALLOC | ELF::SHF_MERGE, 32, "");
511
512 // Exception Handling Sections.
513
514 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
515 // it contains relocatable pointers. In PIC mode, this is probably a big
516 // runtime hit for C++ apps. Either the contents of the LSDA need to be
517 // adjusted or this should be a data section.
518 LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
519 ELF::SHF_ALLOC);
520
521 COFFDebugSymbolsSection = nullptr;
522 COFFDebugTypesSection = nullptr;
523
524 unsigned DebugSecType = ELF::SHT_PROGBITS;
525
526 // MIPS .debug_* sections should have SHT_MIPS_DWARF section type
527 // to distinguish among sections contain DWARF and ECOFF debug formats.
528 // Sections with ECOFF debug format are obsoleted and marked by SHT_PROGBITS.
529 if (T.getArch() == Triple::mips || T.getArch() == Triple::mipsel ||
530 T.getArch() == Triple::mips64 || T.getArch() == Triple::mips64el)
531 DebugSecType = ELF::SHT_MIPS_DWARF;
532
533 // Debug Info Sections.
534 DwarfAbbrevSection =
535 Ctx->getELFSection(".debug_abbrev", DebugSecType, 0);
536 DwarfInfoSection = Ctx->getELFSection(".debug_info", DebugSecType, 0);
537 DwarfLineSection = Ctx->getELFSection(".debug_line", DebugSecType, 0);
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]538 DwarfLineStrSection =
539 Ctx->getELFSection(".debug_line_str", DebugSecType,
540 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]541 DwarfFrameSection = Ctx->getELFSection(".debug_frame", DebugSecType, 0);
542 DwarfPubNamesSection =
543 Ctx->getELFSection(".debug_pubnames", DebugSecType, 0);
544 DwarfPubTypesSection =
545 Ctx->getELFSection(".debug_pubtypes", DebugSecType, 0);
546 DwarfGnuPubNamesSection =
547 Ctx->getELFSection(".debug_gnu_pubnames", DebugSecType, 0);
548 DwarfGnuPubTypesSection =
549 Ctx->getELFSection(".debug_gnu_pubtypes", DebugSecType, 0);
550 DwarfStrSection =
551 Ctx->getELFSection(".debug_str", DebugSecType,
552 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
553 DwarfLocSection = Ctx->getELFSection(".debug_loc", DebugSecType, 0);
554 DwarfARangesSection =
555 Ctx->getELFSection(".debug_aranges", DebugSecType, 0);
556 DwarfRangesSection =
557 Ctx->getELFSection(".debug_ranges", DebugSecType, 0);
558 DwarfMacinfoSection =
559 Ctx->getELFSection(".debug_macinfo", DebugSecType, 0);
560
561 // DWARF5 Experimental Debug Info
562
563 // Accelerator Tables
Pavel Labath6088c232018-04-04 14:42:14 +0000[diff] [blame^]564 DwarfDebugNamesSection =
565 Ctx->getELFSection(".debug_names", ELF::SHT_PROGBITS, 0);
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]566 DwarfAccelNamesSection =
567 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0);
568 DwarfAccelObjCSection =
569 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0);
570 DwarfAccelNamespaceSection =
571 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0);
572 DwarfAccelTypesSection =
573 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0);
574
575 // String Offset and Address Sections
576 DwarfStrOffSection =
577 Ctx->getELFSection(".debug_str_offsets", DebugSecType, 0);
578 DwarfAddrSection = Ctx->getELFSection(".debug_addr", DebugSecType, 0);
579
580 // Fission Sections
581 DwarfInfoDWOSection =
582 Ctx->getELFSection(".debug_info.dwo", DebugSecType, 0);
583 DwarfTypesDWOSection =
584 Ctx->getELFSection(".debug_types.dwo", DebugSecType, 0);
585 DwarfAbbrevDWOSection =
586 Ctx->getELFSection(".debug_abbrev.dwo", DebugSecType, 0);
587 DwarfStrDWOSection =
588 Ctx->getELFSection(".debug_str.dwo", DebugSecType,
589 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
590 DwarfLineDWOSection =
591 Ctx->getELFSection(".debug_line.dwo", DebugSecType, 0);
592 DwarfLocDWOSection =
593 Ctx->getELFSection(".debug_loc.dwo", DebugSecType, 0);
594 DwarfStrOffDWOSection =
595 Ctx->getELFSection(".debug_str_offsets.dwo", DebugSecType, 0);
596
597 // DWP Sections
598 DwarfCUIndexSection =
599 Ctx->getELFSection(".debug_cu_index", DebugSecType, 0);
600 DwarfTUIndexSection =
601 Ctx->getELFSection(".debug_tu_index", DebugSecType, 0);
602
603 StackMapSection =
604 Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
605
606 FaultMapSection =
607 Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
608
609 EHFrameSection =
610 Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags);
Sean Evesona6bcd532017-11-30 13:05:14 +0000[diff] [blame]611
612 StackSizesSection = Ctx->getELFSection(".stack_sizes", ELF::SHT_PROGBITS, 0);
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]613}
614
615void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
616 EHFrameSection = Ctx->getCOFFSection(
617 ".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
618 COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
619 SectionKind::getData());
620
621 // Set the `IMAGE_SCN_MEM_16BIT` flag when compiling for thumb mode. This is
622 // used to indicate to the linker that the text segment contains thumb instructions
623 // and to set the ISA selection bit for calls accordingly.
624 const bool IsThumb = T.getArch() == Triple::thumb;
625
626 CommDirectiveSupportsAlignment = true;
627
628 // COFF
629 BSSSection = Ctx->getCOFFSection(
630 ".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
631 COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
632 SectionKind::getBSS());
633 TextSection = Ctx->getCOFFSection(
634 ".text",
635 (IsThumb ? COFF::IMAGE_SCN_MEM_16BIT : (COFF::SectionCharacteristics)0) |
636 COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE |
637 COFF::IMAGE_SCN_MEM_READ,
638 SectionKind::getText());
639 DataSection = Ctx->getCOFFSection(
640 ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
641 COFF::IMAGE_SCN_MEM_WRITE,
642 SectionKind::getData());
643 ReadOnlySection = Ctx->getCOFFSection(
644 ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
645 SectionKind::getReadOnly());
646
647 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
648 // though it contains relocatable pointers. In PIC mode, this is probably a
649 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
650 // adjusted or this should be a data section.
651 if (T.getArch() == Triple::x86_64) {
652 // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
653 LSDASection = nullptr;
654 } else {
655 LSDASection = Ctx->getCOFFSection(".gcc_except_table",
656 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
657 COFF::IMAGE_SCN_MEM_READ,
658 SectionKind::getReadOnly());
659 }
660
661 // Debug info.
662 COFFDebugSymbolsSection =
663 Ctx->getCOFFSection(".debug$S", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
664 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
665 COFF::IMAGE_SCN_MEM_READ),
666 SectionKind::getMetadata());
667 COFFDebugTypesSection =
668 Ctx->getCOFFSection(".debug$T", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
669 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
670 COFF::IMAGE_SCN_MEM_READ),
671 SectionKind::getMetadata());
Zachary Turner048f8f92017-12-13 22:33:58 +0000[diff] [blame]672 COFFGlobalTypeHashesSection = Ctx->getCOFFSection(
673 ".debug$H",
674 (COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
675 COFF::IMAGE_SCN_MEM_READ),
676 SectionKind::getMetadata());
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]677
678 DwarfAbbrevSection = Ctx->getCOFFSection(
679 ".debug_abbrev",
680 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
681 COFF::IMAGE_SCN_MEM_READ,
682 SectionKind::getMetadata(), "section_abbrev");
683 DwarfInfoSection = Ctx->getCOFFSection(
684 ".debug_info",
685 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
686 COFF::IMAGE_SCN_MEM_READ,
687 SectionKind::getMetadata(), "section_info");
688 DwarfLineSection = Ctx->getCOFFSection(
689 ".debug_line",
690 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
691 COFF::IMAGE_SCN_MEM_READ,
692 SectionKind::getMetadata(), "section_line");
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]693 DwarfLineStrSection = Ctx->getCOFFSection(
694 ".debug_line_str",
695 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
696 COFF::IMAGE_SCN_MEM_READ,
697 SectionKind::getMetadata(), "section_line_str");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]698 DwarfFrameSection = Ctx->getCOFFSection(
699 ".debug_frame",
700 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
701 COFF::IMAGE_SCN_MEM_READ,
702 SectionKind::getMetadata());
703 DwarfPubNamesSection = Ctx->getCOFFSection(
704 ".debug_pubnames",
705 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
706 COFF::IMAGE_SCN_MEM_READ,
707 SectionKind::getMetadata());
708 DwarfPubTypesSection = Ctx->getCOFFSection(
709 ".debug_pubtypes",
710 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
711 COFF::IMAGE_SCN_MEM_READ,
712 SectionKind::getMetadata());
713 DwarfGnuPubNamesSection = Ctx->getCOFFSection(
714 ".debug_gnu_pubnames",
715 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
716 COFF::IMAGE_SCN_MEM_READ,
717 SectionKind::getMetadata());
718 DwarfGnuPubTypesSection = Ctx->getCOFFSection(
719 ".debug_gnu_pubtypes",
720 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
721 COFF::IMAGE_SCN_MEM_READ,
722 SectionKind::getMetadata());
723 DwarfStrSection = Ctx->getCOFFSection(
724 ".debug_str",
725 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
726 COFF::IMAGE_SCN_MEM_READ,
727 SectionKind::getMetadata(), "info_string");
728 DwarfStrOffSection = Ctx->getCOFFSection(
729 ".debug_str_offsets",
730 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
731 COFF::IMAGE_SCN_MEM_READ,
732 SectionKind::getMetadata(), "section_str_off");
733 DwarfLocSection = Ctx->getCOFFSection(
734 ".debug_loc",
735 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
736 COFF::IMAGE_SCN_MEM_READ,
737 SectionKind::getMetadata(), "section_debug_loc");
738 DwarfARangesSection = Ctx->getCOFFSection(
739 ".debug_aranges",
740 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
741 COFF::IMAGE_SCN_MEM_READ,
742 SectionKind::getMetadata());
743 DwarfRangesSection = Ctx->getCOFFSection(
744 ".debug_ranges",
745 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
746 COFF::IMAGE_SCN_MEM_READ,
747 SectionKind::getMetadata(), "debug_range");
748 DwarfMacinfoSection = Ctx->getCOFFSection(
749 ".debug_macinfo",
750 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
751 COFF::IMAGE_SCN_MEM_READ,
752 SectionKind::getMetadata(), "debug_macinfo");
753 DwarfInfoDWOSection = Ctx->getCOFFSection(
754 ".debug_info.dwo",
755 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
756 COFF::IMAGE_SCN_MEM_READ,
757 SectionKind::getMetadata(), "section_info_dwo");
758 DwarfTypesDWOSection = Ctx->getCOFFSection(
759 ".debug_types.dwo",
760 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
761 COFF::IMAGE_SCN_MEM_READ,
762 SectionKind::getMetadata(), "section_types_dwo");
763 DwarfAbbrevDWOSection = Ctx->getCOFFSection(
764 ".debug_abbrev.dwo",
765 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
766 COFF::IMAGE_SCN_MEM_READ,
767 SectionKind::getMetadata(), "section_abbrev_dwo");
768 DwarfStrDWOSection = Ctx->getCOFFSection(
769 ".debug_str.dwo",
770 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
771 COFF::IMAGE_SCN_MEM_READ,
772 SectionKind::getMetadata(), "skel_string");
773 DwarfLineDWOSection = Ctx->getCOFFSection(
774 ".debug_line.dwo",
775 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
776 COFF::IMAGE_SCN_MEM_READ,
777 SectionKind::getMetadata());
778 DwarfLocDWOSection = Ctx->getCOFFSection(
779 ".debug_loc.dwo",
780 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
781 COFF::IMAGE_SCN_MEM_READ,
782 SectionKind::getMetadata(), "skel_loc");
783 DwarfStrOffDWOSection = Ctx->getCOFFSection(
784 ".debug_str_offsets.dwo",
785 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
786 COFF::IMAGE_SCN_MEM_READ,
787 SectionKind::getMetadata(), "section_str_off_dwo");
788 DwarfAddrSection = Ctx->getCOFFSection(
789 ".debug_addr",
790 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
791 COFF::IMAGE_SCN_MEM_READ,
792 SectionKind::getMetadata(), "addr_sec");
793 DwarfCUIndexSection = Ctx->getCOFFSection(
794 ".debug_cu_index",
795 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
796 COFF::IMAGE_SCN_MEM_READ,
797 SectionKind::getMetadata());
798 DwarfTUIndexSection = Ctx->getCOFFSection(
799 ".debug_tu_index",
800 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
801 COFF::IMAGE_SCN_MEM_READ,
802 SectionKind::getMetadata());
Pavel Labath6088c232018-04-04 14:42:14 +0000[diff] [blame^]803 DwarfDebugNamesSection = Ctx->getCOFFSection(
804 ".debug_names",
805 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
806 COFF::IMAGE_SCN_MEM_READ,
807 SectionKind::getMetadata(), "debug_names_begin");
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]808 DwarfAccelNamesSection = Ctx->getCOFFSection(
809 ".apple_names",
810 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
811 COFF::IMAGE_SCN_MEM_READ,
812 SectionKind::getMetadata(), "names_begin");
813 DwarfAccelNamespaceSection = Ctx->getCOFFSection(
814 ".apple_namespaces",
815 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
816 COFF::IMAGE_SCN_MEM_READ,
817 SectionKind::getMetadata(), "namespac_begin");
818 DwarfAccelTypesSection = Ctx->getCOFFSection(
819 ".apple_types",
820 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
821 COFF::IMAGE_SCN_MEM_READ,
822 SectionKind::getMetadata(), "types_begin");
823 DwarfAccelObjCSection = Ctx->getCOFFSection(
824 ".apple_objc",
825 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
826 COFF::IMAGE_SCN_MEM_READ,
827 SectionKind::getMetadata(), "objc_begin");
828
829 DrectveSection = Ctx->getCOFFSection(
830 ".drectve", COFF::IMAGE_SCN_LNK_INFO | COFF::IMAGE_SCN_LNK_REMOVE,
831 SectionKind::getMetadata());
832
833 PDataSection = Ctx->getCOFFSection(
834 ".pdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
835 SectionKind::getData());
836
837 XDataSection = Ctx->getCOFFSection(
838 ".xdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
839 SectionKind::getData());
840
841 SXDataSection = Ctx->getCOFFSection(".sxdata", COFF::IMAGE_SCN_LNK_INFO,
842 SectionKind::getMetadata());
843
Adrian McCarthydb2736d2018-01-09 23:49:30 +0000[diff] [blame]844 GFIDsSection = Ctx->getCOFFSection(".gfids$y",
845 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
846 COFF::IMAGE_SCN_MEM_READ,
847 SectionKind::getMetadata());
848
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]849 TLSDataSection = Ctx->getCOFFSection(
850 ".tls$", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
851 COFF::IMAGE_SCN_MEM_WRITE,
852 SectionKind::getData());
853
854 StackMapSection = Ctx->getCOFFSection(".llvm_stackmaps",
855 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
856 COFF::IMAGE_SCN_MEM_READ,
857 SectionKind::getReadOnly());
858}
859
860void MCObjectFileInfo::initWasmMCObjectFileInfo(const Triple &T) {
861 // TODO: Set the section types and flags.
862 TextSection = Ctx->getWasmSection(".text", SectionKind::getText());
863 DataSection = Ctx->getWasmSection(".data", SectionKind::getData());
864
865 // TODO: Set the section types and flags.
866 DwarfLineSection = Ctx->getWasmSection(".debug_line", SectionKind::getMetadata());
Paul Robinson1f900292018-02-06 20:29:21 +0000[diff] [blame]867 DwarfLineStrSection =
868 Ctx->getWasmSection(".debug_line_str", SectionKind::getMetadata());
Sean Eveson661e4fb2017-11-30 12:43:25 +0000[diff] [blame]869 DwarfStrSection = Ctx->getWasmSection(".debug_str", SectionKind::getMetadata());
870 DwarfLocSection = Ctx->getWasmSection(".debug_loc", SectionKind::getMetadata());
871 DwarfAbbrevSection = Ctx->getWasmSection(".debug_abbrev", SectionKind::getMetadata(), "section_abbrev");
872 DwarfARangesSection = Ctx->getWasmSection(".debug_aranges", SectionKind::getMetadata());
873 DwarfRangesSection = Ctx->getWasmSection(".debug_ranges", SectionKind::getMetadata(), "debug_range");
874 DwarfMacinfoSection = Ctx->getWasmSection(".debug_macinfo", SectionKind::getMetadata(), "debug_macinfo");
875 DwarfAddrSection = Ctx->getWasmSection(".debug_addr", SectionKind::getMetadata());
876 DwarfCUIndexSection = Ctx->getWasmSection(".debug_cu_index", SectionKind::getMetadata());
877 DwarfTUIndexSection = Ctx->getWasmSection(".debug_tu_index", SectionKind::getMetadata());
878 DwarfInfoSection = Ctx->getWasmSection(".debug_info", SectionKind::getMetadata(), "section_info");
879 DwarfFrameSection = Ctx->getWasmSection(".debug_frame", SectionKind::getMetadata());
880 DwarfPubNamesSection = Ctx->getWasmSection(".debug_pubnames", SectionKind::getMetadata());
881 DwarfPubTypesSection = Ctx->getWasmSection(".debug_pubtypes", SectionKind::getMetadata());
882
883 // TODO: Define more sections.
884}
885
886void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
887 MCContext &ctx,
888 bool LargeCodeModel) {
889 PositionIndependent = PIC;
890 Ctx = &ctx;
891
892 // Common.
893 CommDirectiveSupportsAlignment = true;
894 SupportsWeakOmittedEHFrame = true;
895 SupportsCompactUnwindWithoutEHFrame = false;
896 OmitDwarfIfHaveCompactUnwind = false;
897
898 PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =
899 dwarf::DW_EH_PE_absptr;
900
901 CompactUnwindDwarfEHFrameOnly = 0;
902
903 EHFrameSection = nullptr; // Created on demand.
904 CompactUnwindSection = nullptr; // Used only by selected targets.
905 DwarfAccelNamesSection = nullptr; // Used only by selected targets.
906 DwarfAccelObjCSection = nullptr; // Used only by selected targets.
907 DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
908 DwarfAccelTypesSection = nullptr; // Used only by selected targets.
909
910 TT = TheTriple;
911
912 switch (TT.getObjectFormat()) {
913 case Triple::MachO:
914 Env = IsMachO;
915 initMachOMCObjectFileInfo(TT);
916 break;
917 case Triple::COFF:
918 if (!TT.isOSWindows())
919 report_fatal_error(
920 "Cannot initialize MC for non-Windows COFF object files.");
921
922 Env = IsCOFF;
923 initCOFFMCObjectFileInfo(TT);
924 break;
925 case Triple::ELF:
926 Env = IsELF;
927 initELFMCObjectFileInfo(TT, LargeCodeModel);
928 break;
929 case Triple::Wasm:
930 Env = IsWasm;
931 initWasmMCObjectFileInfo(TT);
932 break;
933 case Triple::UnknownObjectFormat:
934 report_fatal_error("Cannot initialize MC for unknown object file format.");
935 break;
936 }
937}
938
939MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
940 return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
941 0, utostr(Hash));
942}