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gerrit-public.fairphone.software / fp2-dev / platform / external / llvm / 371e17c03c3169459c84986d4a318f6d6d3f8730 / . / lib / MC / MCObjectFileInfo.cpp
blob: 8053624831bdf7e0cf608fd10c15ced73346c62d [file] [log] [blame]
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]1//===-- MObjectFileInfo.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/MC/MCContext.h"
12#include "llvm/MC/MCSection.h"
13#include "llvm/MC/MCSectionCOFF.h"
14#include "llvm/MC/MCSectionELF.h"
15#include "llvm/MC/MCSectionMachO.h"
16#include "llvm/ADT/Triple.h"
17using namespace llvm;
18
19void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
20 // MachO
21 IsFunctionEHFrameSymbolPrivate = false;
22 SupportsWeakOmittedEHFrame = false;
23
Evan Cheng203576a2011-07-20 19:50:42 +0000[diff] [blame]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;
29
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]30 // .comm doesn't support alignment before Leopard.
31 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
32 CommDirectiveSupportsAlignment = false;
33
34 TextSection // .text
35 = Ctx->getMachOSection("__TEXT", "__text",
36 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
37 SectionKind::getText());
38 DataSection // .data
39 = Ctx->getMachOSection("__DATA", "__data", 0,
40 SectionKind::getDataRel());
41
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());
50
51 // TODO: Verify datarel below.
52 TLSTLVSection // .tlv
53 = Ctx->getMachOSection("__DATA", "__thread_vars",
54 MCSectionMachO::S_THREAD_LOCAL_VARIABLES,
55 SectionKind::getDataRel());
56
57 TLSThreadInitSection
58 = Ctx->getMachOSection("__DATA", "__thread_init",
Jim Grosbach946227d2011-11-15 16:46:22 +0000[diff] [blame]59 MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
60 SectionKind::getDataRel());
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]61
62 CStringSection // .cstring
63 = Ctx->getMachOSection("__TEXT", "__cstring",
64 MCSectionMachO::S_CSTRING_LITERALS,
65 SectionKind::getMergeable1ByteCString());
66 UStringSection
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());
77
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());
87
88 ReadOnlySection // .const
89 = Ctx->getMachOSection("__TEXT", "__const", 0,
90 SectionKind::getReadOnly());
91
92 TextCoalSection
93 = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
94 MCSectionMachO::S_COALESCED |
95 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
96 SectionKind::getText());
97 ConstTextCoalSection
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());
104 DataCoalSection
105 = Ctx->getMachOSection("__DATA","__datacoal_nt",
106 MCSectionMachO::S_COALESCED,
107 SectionKind::getDataRel());
108 DataCommonSection
109 = Ctx->getMachOSection("__DATA","__common",
110 MCSectionMachO::S_ZEROFILL,
111 SectionKind::getBSS());
112 DataBSSSection
113 = Ctx->getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL,
114 SectionKind::getBSS());
115
116
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());
125
126 if (RelocM == Reloc::Static) {
127 StaticCtorSection
128 = Ctx->getMachOSection("__TEXT", "__constructor", 0,
129 SectionKind::getDataRel());
130 StaticDtorSection
131 = Ctx->getMachOSection("__TEXT", "__destructor", 0,
132 SectionKind::getDataRel());
133 } else {
134 StaticCtorSection
135 = Ctx->getMachOSection("__DATA", "__mod_init_func",
136 MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
137 SectionKind::getDataRel());
138 StaticDtorSection
139 = Ctx->getMachOSection("__DATA", "__mod_term_func",
140 MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
141 SectionKind::getDataRel());
142 }
143
144 // Exception Handling.
145 LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
146 SectionKind::getReadOnlyWithRel());
147
148 if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
149 CompactUnwindSection =
150 Ctx->getMachOSection("__LD", "__compact_unwind",
151 MCSectionMachO::S_ATTR_DEBUG,
152 SectionKind::getReadOnly());
153
154 // Debug Information.
Eric Christopher09ac3d82011-11-07 09:24:32 +0000[diff] [blame]155 DwarfAccelNamesSection =
156 Ctx->getMachOSection("__DWARF", "__apple_names",
157 MCSectionMachO::S_ATTR_DEBUG,
158 SectionKind::getMetadata());
159 DwarfAccelObjCSection =
160 Ctx->getMachOSection("__DWARF", "__apple_objc",
161 MCSectionMachO::S_ATTR_DEBUG,
162 SectionKind::getMetadata());
163 // 16 character section limit...
164 DwarfAccelNamespaceSection =
165 Ctx->getMachOSection("__DWARF", "__apple_namespac",
166 MCSectionMachO::S_ATTR_DEBUG,
167 SectionKind::getMetadata());
168 DwarfAccelTypesSection =
169 Ctx->getMachOSection("__DWARF", "__apple_types",
170 MCSectionMachO::S_ATTR_DEBUG,
171 SectionKind::getMetadata());
Jim Grosbach2684d9e2012-05-11 01:41:30 +0000[diff] [blame]172
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]173 DwarfAbbrevSection =
174 Ctx->getMachOSection("__DWARF", "__debug_abbrev",
175 MCSectionMachO::S_ATTR_DEBUG,
176 SectionKind::getMetadata());
177 DwarfInfoSection =
178 Ctx->getMachOSection("__DWARF", "__debug_info",
179 MCSectionMachO::S_ATTR_DEBUG,
180 SectionKind::getMetadata());
181 DwarfLineSection =
182 Ctx->getMachOSection("__DWARF", "__debug_line",
183 MCSectionMachO::S_ATTR_DEBUG,
184 SectionKind::getMetadata());
185 DwarfFrameSection =
186 Ctx->getMachOSection("__DWARF", "__debug_frame",
187 MCSectionMachO::S_ATTR_DEBUG,
188 SectionKind::getMetadata());
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]189 DwarfPubTypesSection =
190 Ctx->getMachOSection("__DWARF", "__debug_pubtypes",
191 MCSectionMachO::S_ATTR_DEBUG,
192 SectionKind::getMetadata());
193 DwarfStrSection =
194 Ctx->getMachOSection("__DWARF", "__debug_str",
195 MCSectionMachO::S_ATTR_DEBUG,
196 SectionKind::getMetadata());
197 DwarfLocSection =
198 Ctx->getMachOSection("__DWARF", "__debug_loc",
199 MCSectionMachO::S_ATTR_DEBUG,
200 SectionKind::getMetadata());
201 DwarfARangesSection =
202 Ctx->getMachOSection("__DWARF", "__debug_aranges",
203 MCSectionMachO::S_ATTR_DEBUG,
204 SectionKind::getMetadata());
205 DwarfRangesSection =
206 Ctx->getMachOSection("__DWARF", "__debug_ranges",
207 MCSectionMachO::S_ATTR_DEBUG,
208 SectionKind::getMetadata());
209 DwarfMacroInfoSection =
210 Ctx->getMachOSection("__DWARF", "__debug_macinfo",
211 MCSectionMachO::S_ATTR_DEBUG,
212 SectionKind::getMetadata());
213 DwarfDebugInlineSection =
214 Ctx->getMachOSection("__DWARF", "__debug_inlined",
215 MCSectionMachO::S_ATTR_DEBUG,
216 SectionKind::getMetadata());
217
218 TLSExtraDataSection = TLSTLVSection;
219}
220
221void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
Evan Cheng203576a2011-07-20 19:50:42 +0000[diff] [blame]222 if (T.getArch() == Triple::x86) {
223 PersonalityEncoding = (RelocM == Reloc::PIC_)
Jim Grosbach946227d2011-11-15 16:46:22 +0000[diff] [blame]224 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
225 : dwarf::DW_EH_PE_absptr;
Evan Cheng203576a2011-07-20 19:50:42 +0000[diff] [blame]226 LSDAEncoding = (RelocM == Reloc::PIC_)
227 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
228 : dwarf::DW_EH_PE_absptr;
229 FDEEncoding = FDECFIEncoding = (RelocM == Reloc::PIC_)
230 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
231 : dwarf::DW_EH_PE_absptr;
232 TTypeEncoding = (RelocM == Reloc::PIC_)
Jim Grosbach946227d2011-11-15 16:46:22 +0000[diff] [blame]233 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
234 : dwarf::DW_EH_PE_absptr;
Evan Cheng203576a2011-07-20 19:50:42 +0000[diff] [blame]235 } else if (T.getArch() == Triple::x86_64) {
236 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
237
238 if (RelocM == Reloc::PIC_) {
239 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
240 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
241 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
242 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
243 (CMModel == CodeModel::Small
244 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
245 FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
246 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
247 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
248 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
249 } else {
250 PersonalityEncoding =
251 (CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
252 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
253 LSDAEncoding = (CMModel == CodeModel::Small)
254 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
255 FDEEncoding = dwarf::DW_EH_PE_udata4;
256 TTypeEncoding = (CMModel == CodeModel::Small)
257 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
258 }
259 }
260
David Chisnall4cbcee12012-02-17 17:31:15 +0000[diff] [blame]261 // Solaris requires different flags for .eh_frame to seemingly every other
262 // platform.
David Chisnallbce0de42012-04-10 11:44:33 +0000[diff] [blame]263 EHSectionType = ELF::SHT_PROGBITS;
David Chisnall4cbcee12012-02-17 17:31:15 +0000[diff] [blame]264 EHSectionFlags = ELF::SHF_ALLOC;
David Chisnallbce0de42012-04-10 11:44:33 +0000[diff] [blame]265 if (T.getOS() == Triple::Solaris) {
266 if (T.getArch() == Triple::x86_64)
267 EHSectionType = ELF::SHT_X86_64_UNWIND;
268 else
269 EHSectionFlags |= ELF::SHF_WRITE;
270 }
David Chisnall4cbcee12012-02-17 17:31:15 +0000[diff] [blame]271
272
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]273 // ELF
274 BSSSection =
275 Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
Anton Korobeynikov4a99f592012-01-25 22:24:19 +0000[diff] [blame]276 ELF::SHF_WRITE | ELF::SHF_ALLOC,
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]277 SectionKind::getBSS());
278
279 TextSection =
280 Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
281 ELF::SHF_EXECINSTR |
282 ELF::SHF_ALLOC,
283 SectionKind::getText());
284
285 DataSection =
286 Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
287 ELF::SHF_WRITE |ELF::SHF_ALLOC,
288 SectionKind::getDataRel());
289
290 ReadOnlySection =
291 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
292 ELF::SHF_ALLOC,
293 SectionKind::getReadOnly());
294
295 TLSDataSection =
296 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
297 ELF::SHF_ALLOC | ELF::SHF_TLS |
298 ELF::SHF_WRITE,
299 SectionKind::getThreadData());
300
301 TLSBSSSection =
302 Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
303 ELF::SHF_ALLOC | ELF::SHF_TLS |
304 ELF::SHF_WRITE,
305 SectionKind::getThreadBSS());
306
307 DataRelSection =
308 Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
309 ELF::SHF_ALLOC |ELF::SHF_WRITE,
310 SectionKind::getDataRel());
311
312 DataRelLocalSection =
313 Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
314 ELF::SHF_ALLOC |ELF::SHF_WRITE,
315 SectionKind::getDataRelLocal());
316
317 DataRelROSection =
318 Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
319 ELF::SHF_ALLOC |ELF::SHF_WRITE,
320 SectionKind::getReadOnlyWithRel());
321
322 DataRelROLocalSection =
323 Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
324 ELF::SHF_ALLOC |ELF::SHF_WRITE,
325 SectionKind::getReadOnlyWithRelLocal());
326
327 MergeableConst4Section =
328 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
329 ELF::SHF_ALLOC |ELF::SHF_MERGE,
330 SectionKind::getMergeableConst4());
331
332 MergeableConst8Section =
333 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
334 ELF::SHF_ALLOC |ELF::SHF_MERGE,
335 SectionKind::getMergeableConst8());
336
337 MergeableConst16Section =
338 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
339 ELF::SHF_ALLOC |ELF::SHF_MERGE,
340 SectionKind::getMergeableConst16());
341
342 StaticCtorSection =
343 Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
344 ELF::SHF_ALLOC |ELF::SHF_WRITE,
345 SectionKind::getDataRel());
346
347 StaticDtorSection =
348 Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
349 ELF::SHF_ALLOC |ELF::SHF_WRITE,
350 SectionKind::getDataRel());
351
352 // Exception Handling Sections.
353
354 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
355 // it contains relocatable pointers. In PIC mode, this is probably a big
356 // runtime hit for C++ apps. Either the contents of the LSDA need to be
357 // adjusted or this should be a data section.
358 LSDASection =
359 Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
360 ELF::SHF_ALLOC,
361 SectionKind::getReadOnly());
362
363 // Debug Info Sections.
364 DwarfAbbrevSection =
365 Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
366 SectionKind::getMetadata());
367 DwarfInfoSection =
368 Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0,
369 SectionKind::getMetadata());
370 DwarfLineSection =
371 Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0,
372 SectionKind::getMetadata());
373 DwarfFrameSection =
374 Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0,
375 SectionKind::getMetadata());
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]376 DwarfPubTypesSection =
377 Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0,
378 SectionKind::getMetadata());
379 DwarfStrSection =
Nick Lewycky5a86c5b2011-10-26 18:44:32 +0000[diff] [blame]380 Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
381 ELF::SHF_MERGE | ELF::SHF_STRINGS,
382 SectionKind::getMergeable1ByteCString());
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]383 DwarfLocSection =
384 Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
385 SectionKind::getMetadata());
386 DwarfARangesSection =
387 Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0,
388 SectionKind::getMetadata());
389 DwarfRangesSection =
390 Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0,
391 SectionKind::getMetadata());
392 DwarfMacroInfoSection =
393 Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0,
394 SectionKind::getMetadata());
395}
396
397
398void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
399 // COFF
400 TextSection =
401 Ctx->getCOFFSection(".text",
402 COFF::IMAGE_SCN_CNT_CODE |
403 COFF::IMAGE_SCN_MEM_EXECUTE |
404 COFF::IMAGE_SCN_MEM_READ,
405 SectionKind::getText());
406 DataSection =
407 Ctx->getCOFFSection(".data",
408 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
409 COFF::IMAGE_SCN_MEM_READ |
410 COFF::IMAGE_SCN_MEM_WRITE,
411 SectionKind::getDataRel());
412 ReadOnlySection =
413 Ctx->getCOFFSection(".rdata",
414 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
415 COFF::IMAGE_SCN_MEM_READ,
416 SectionKind::getReadOnly());
Michael J. Spencer32d22ee2012-02-23 21:56:08 +0000[diff] [blame]417 if (T.getOS() == Triple::Win32) {
418 StaticCtorSection =
419 Ctx->getCOFFSection(".CRT$XCU",
420 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
421 COFF::IMAGE_SCN_MEM_READ,
422 SectionKind::getReadOnly());
423 } else {
424 StaticCtorSection =
425 Ctx->getCOFFSection(".ctors",
426 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
427 COFF::IMAGE_SCN_MEM_READ |
428 COFF::IMAGE_SCN_MEM_WRITE,
429 SectionKind::getDataRel());
430 }
431
432
Anton Korobeynikov371e17c2012-09-23 15:53:47 +0000[diff] [blame^]433 if (T.getOS() == Triple::Win32) {
434 StaticDtorSection =
435 Ctx->getCOFFSection(".CRT$XTX",
436 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
437 COFF::IMAGE_SCN_MEM_READ,
438 SectionKind::getReadOnly());
439 } else {
440 StaticDtorSection =
441 Ctx->getCOFFSection(".dtors",
442 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
443 COFF::IMAGE_SCN_MEM_READ |
444 COFF::IMAGE_SCN_MEM_WRITE,
445 SectionKind::getDataRel());
446 }
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]447
448 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
449 // though it contains relocatable pointers. In PIC mode, this is probably a
450 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
451 // adjusted or this should be a data section.
452 LSDASection =
453 Ctx->getCOFFSection(".gcc_except_table",
454 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
455 COFF::IMAGE_SCN_MEM_READ,
456 SectionKind::getReadOnly());
457
458 // Debug info.
459 DwarfAbbrevSection =
460 Ctx->getCOFFSection(".debug_abbrev",
461 COFF::IMAGE_SCN_MEM_DISCARDABLE |
462 COFF::IMAGE_SCN_MEM_READ,
463 SectionKind::getMetadata());
464 DwarfInfoSection =
465 Ctx->getCOFFSection(".debug_info",
466 COFF::IMAGE_SCN_MEM_DISCARDABLE |
467 COFF::IMAGE_SCN_MEM_READ,
468 SectionKind::getMetadata());
469 DwarfLineSection =
470 Ctx->getCOFFSection(".debug_line",
471 COFF::IMAGE_SCN_MEM_DISCARDABLE |
472 COFF::IMAGE_SCN_MEM_READ,
473 SectionKind::getMetadata());
474 DwarfFrameSection =
475 Ctx->getCOFFSection(".debug_frame",
476 COFF::IMAGE_SCN_MEM_DISCARDABLE |
477 COFF::IMAGE_SCN_MEM_READ,
478 SectionKind::getMetadata());
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]479 DwarfPubTypesSection =
480 Ctx->getCOFFSection(".debug_pubtypes",
481 COFF::IMAGE_SCN_MEM_DISCARDABLE |
482 COFF::IMAGE_SCN_MEM_READ,
483 SectionKind::getMetadata());
484 DwarfStrSection =
485 Ctx->getCOFFSection(".debug_str",
486 COFF::IMAGE_SCN_MEM_DISCARDABLE |
487 COFF::IMAGE_SCN_MEM_READ,
488 SectionKind::getMetadata());
489 DwarfLocSection =
490 Ctx->getCOFFSection(".debug_loc",
491 COFF::IMAGE_SCN_MEM_DISCARDABLE |
492 COFF::IMAGE_SCN_MEM_READ,
493 SectionKind::getMetadata());
494 DwarfARangesSection =
495 Ctx->getCOFFSection(".debug_aranges",
496 COFF::IMAGE_SCN_MEM_DISCARDABLE |
497 COFF::IMAGE_SCN_MEM_READ,
498 SectionKind::getMetadata());
499 DwarfRangesSection =
500 Ctx->getCOFFSection(".debug_ranges",
501 COFF::IMAGE_SCN_MEM_DISCARDABLE |
502 COFF::IMAGE_SCN_MEM_READ,
503 SectionKind::getMetadata());
504 DwarfMacroInfoSection =
505 Ctx->getCOFFSection(".debug_macinfo",
506 COFF::IMAGE_SCN_MEM_DISCARDABLE |
507 COFF::IMAGE_SCN_MEM_READ,
508 SectionKind::getMetadata());
509
510 DrectveSection =
511 Ctx->getCOFFSection(".drectve",
512 COFF::IMAGE_SCN_LNK_INFO,
513 SectionKind::getMetadata());
514
515 PDataSection =
516 Ctx->getCOFFSection(".pdata",
517 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
Anton Korobeynikov0a0e50c2012-08-08 12:46:46 +0000[diff] [blame]518 COFF::IMAGE_SCN_MEM_READ,
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]519 SectionKind::getDataRel());
520
521 XDataSection =
522 Ctx->getCOFFSection(".xdata",
523 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
Anton Korobeynikov0a0e50c2012-08-08 12:46:46 +0000[diff] [blame]524 COFF::IMAGE_SCN_MEM_READ,
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]525 SectionKind::getDataRel());
Anton Korobeynikovd4a19b62012-02-11 17:26:53 +0000[diff] [blame]526 TLSDataSection =
527 Ctx->getCOFFSection(".tls$",
528 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
529 COFF::IMAGE_SCN_MEM_READ |
530 COFF::IMAGE_SCN_MEM_WRITE,
531 SectionKind::getDataRel());
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]532}
533
534void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
Evan Cheng203576a2011-07-20 19:50:42 +0000[diff] [blame]535 CodeModel::Model cm,
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]536 MCContext &ctx) {
537 RelocM = relocm;
Evan Cheng203576a2011-07-20 19:50:42 +0000[diff] [blame]538 CMModel = cm;
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]539 Ctx = &ctx;
540
541 // Common.
542 CommDirectiveSupportsAlignment = true;
543 SupportsWeakOmittedEHFrame = true;
544 IsFunctionEHFrameSymbolPrivate = true;
Evan Cheng203576a2011-07-20 19:50:42 +0000[diff] [blame]545
546 PersonalityEncoding = LSDAEncoding = FDEEncoding = FDECFIEncoding =
547 TTypeEncoding = dwarf::DW_EH_PE_absptr;
548
Eric Christopher09ac3d82011-11-07 09:24:32 +0000[diff] [blame]549 EHFrameSection = 0; // Created on demand.
550 CompactUnwindSection = 0; // Used only by selected targets.
551 DwarfAccelNamesSection = 0; // Used only by selected targets.
552 DwarfAccelObjCSection = 0; // Used only by selected targets.
553 DwarfAccelNamespaceSection = 0; // Used only by selected targets.
554 DwarfAccelTypesSection = 0; // Used only by selected targets.
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]555
556 Triple T(TT);
557 Triple::ArchType Arch = T.getArch();
558 // FIXME: Checking for Arch here to filter out bogus triples such as
559 // cellspu-apple-darwin. Perhaps we should fix in Triple?
560 if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
561 Arch == Triple::arm || Arch == Triple::thumb ||
562 Arch == Triple::ppc || Arch == Triple::ppc64 ||
563 Arch == Triple::UnknownArch) &&
564 (T.isOSDarwin() || T.getEnvironment() == Triple::MachO)) {
565 Env = IsMachO;
566 InitMachOMCObjectFileInfo(T);
Evan Cheng36c62d32011-07-20 23:53:54 +0000[diff] [blame]567 } else if ((Arch == Triple::x86 || Arch == Triple::x86_64) &&
568 (T.getOS() == Triple::MinGW32 || T.getOS() == Triple::Cygwin ||
569 T.getOS() == Triple::Win32)) {
Evan Chenge76a33b2011-07-20 05:58:47 +0000[diff] [blame]570 Env = IsCOFF;
571 InitCOFFMCObjectFileInfo(T);
572 } else {
573 Env = IsELF;
574 InitELFMCObjectFileInfo(T);
575 }
576}
577
David Chisnall8bb51ef2012-02-17 16:51:02 +0000[diff] [blame]578void MCObjectFileInfo::InitEHFrameSection() {
579 if (Env == IsMachO)
580 EHFrameSection =
581 Ctx->getMachOSection("__TEXT", "__eh_frame",
582 MCSectionMachO::S_COALESCED |
583 MCSectionMachO::S_ATTR_NO_TOC |
584 MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
585 MCSectionMachO::S_ATTR_LIVE_SUPPORT,
586 SectionKind::getReadOnly());
587 else if (Env == IsELF)
588 EHFrameSection =
David Chisnallbce0de42012-04-10 11:44:33 +0000[diff] [blame]589 Ctx->getELFSection(".eh_frame", EHSectionType,
David Chisnall4cbcee12012-02-17 17:31:15 +0000[diff] [blame]590 EHSectionFlags,
David Chisnall8bb51ef2012-02-17 16:51:02 +0000[diff] [blame]591 SectionKind::getDataRel());
592 else
593 EHFrameSection =
594 Ctx->getCOFFSection(".eh_frame",
595 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
596 COFF::IMAGE_SCN_MEM_READ |
597 COFF::IMAGE_SCN_MEM_WRITE,
598 SectionKind::getDataRel());
599}