1 //===-- llvm/MC/MCObjectFileInfo.h - Object File Info -----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file describes common object file formats.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_MC_MCOBJECTFILEINFO_H
15 #define LLVM_MC_MCOBJECTFILEINFO_H
17 #include "llvm/ADT/Triple.h"
18 #include "llvm/Support/CodeGen.h"
24 class MCObjectFileInfo {
26 /// True if .comm supports alignment. This is a hack for as long as we
27 /// support 10.4 Tiger, whose assembler doesn't support alignment on comm.
28 bool CommDirectiveSupportsAlignment;
30 /// True if target object file supports a weak_definition of constant 0 for an
32 bool SupportsWeakOmittedEHFrame;
34 /// True if the target object file supports emitting a compact unwind section
35 /// without an associated EH frame section.
36 bool SupportsCompactUnwindWithoutEHFrame;
38 /// OmitDwarfIfHaveCompactUnwind - True if the target object file
39 /// supports having some functions with compact unwind and other with
41 bool OmitDwarfIfHaveCompactUnwind;
43 /// PersonalityEncoding, LSDAEncoding, TTypeEncoding - Some encoding values
45 unsigned PersonalityEncoding;
46 unsigned LSDAEncoding;
47 unsigned FDECFIEncoding;
48 unsigned TTypeEncoding;
50 /// Compact unwind encoding indicating that we should emit only an EH frame.
51 unsigned CompactUnwindDwarfEHFrameOnly;
53 /// Section directive for standard text.
54 MCSection *TextSection;
56 /// Section directive for standard data.
57 MCSection *DataSection;
59 /// Section that is default initialized to zero.
60 MCSection *BSSSection;
62 /// Section that is readonly and can contain arbitrary initialized data.
63 /// Targets are not required to have a readonly section. If they don't,
64 /// various bits of code will fall back to using the data section for
66 MCSection *ReadOnlySection;
68 /// This section contains the static constructor pointer list.
69 MCSection *StaticCtorSection;
71 /// This section contains the static destructor pointer list.
72 MCSection *StaticDtorSection;
74 /// If exception handling is supported by the target, this is the section the
75 /// Language Specific Data Area information is emitted to.
76 MCSection *LSDASection;
78 /// If exception handling is supported by the target and the target can
79 /// support a compact representation of the CIE and FDE, this is the section
80 /// to emit them into.
81 MCSection *CompactUnwindSection;
83 // Dwarf sections for debug info. If a target supports debug info, these must
85 MCSection *DwarfAbbrevSection;
86 MCSection *DwarfInfoSection;
87 MCSection *DwarfLineSection;
88 MCSection *DwarfFrameSection;
89 MCSection *DwarfPubTypesSection;
90 const MCSection *DwarfDebugInlineSection;
91 MCSection *DwarfStrSection;
92 MCSection *DwarfLocSection;
93 MCSection *DwarfARangesSection;
94 MCSection *DwarfRangesSection;
95 // The pubnames section is no longer generated by default. The generation
96 // can be enabled by a compiler flag.
97 MCSection *DwarfPubNamesSection;
99 /// DWARF5 Experimental Debug Info Sections
100 /// DwarfAccelNamesSection, DwarfAccelObjCSection,
101 /// DwarfAccelNamespaceSection, DwarfAccelTypesSection -
102 /// If we use the DWARF accelerated hash tables then we want to emit these
104 MCSection *DwarfAccelNamesSection;
105 MCSection *DwarfAccelObjCSection;
106 MCSection *DwarfAccelNamespaceSection;
107 MCSection *DwarfAccelTypesSection;
109 // These are used for the Fission separate debug information files.
110 MCSection *DwarfInfoDWOSection;
111 MCSection *DwarfTypesDWOSection;
112 MCSection *DwarfAbbrevDWOSection;
113 MCSection *DwarfStrDWOSection;
114 MCSection *DwarfLineDWOSection;
115 MCSection *DwarfLocDWOSection;
116 MCSection *DwarfStrOffDWOSection;
117 MCSection *DwarfAddrSection;
119 // These are for Fission DWP files.
120 MCSection *DwarfCUIndexSection;
121 MCSection *DwarfTUIndexSection;
123 /// Section for newer gnu pubnames.
124 MCSection *DwarfGnuPubNamesSection;
125 /// Section for newer gnu pubtypes.
126 MCSection *DwarfGnuPubTypesSection;
128 MCSection *COFFDebugSymbolsSection;
130 /// Extra TLS Variable Data section.
132 /// If the target needs to put additional information for a TLS variable,
134 MCSection *TLSExtraDataSection;
136 /// Section directive for Thread Local data. ELF, MachO and COFF.
137 MCSection *TLSDataSection; // Defaults to ".tdata".
139 /// Section directive for Thread Local uninitialized data.
141 /// Null if this target doesn't support a BSS section. ELF and MachO only.
142 MCSection *TLSBSSSection; // Defaults to ".tbss".
144 /// StackMap section.
145 MCSection *StackMapSection;
147 /// FaultMap section.
148 MCSection *FaultMapSection;
150 /// EH frame section.
152 /// It is initialized on demand so it can be overwritten (with uniquing).
153 MCSection *EHFrameSection;
155 // ELF specific sections.
156 MCSection *DataRelROSection;
157 MCSection *MergeableConst4Section;
158 MCSection *MergeableConst8Section;
159 MCSection *MergeableConst16Section;
161 // MachO specific sections.
163 /// Section for thread local structure information.
165 /// Contains the source code name of the variable, visibility and a pointer to
166 /// the initial value (.tdata or .tbss).
167 MCSection *TLSTLVSection; // Defaults to ".tlv".
169 /// Section for thread local data initialization functions.
170 const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func".
172 MCSection *CStringSection;
173 MCSection *UStringSection;
174 MCSection *TextCoalSection;
175 MCSection *ConstTextCoalSection;
176 MCSection *ConstDataSection;
177 MCSection *DataCoalSection;
178 MCSection *DataCommonSection;
179 MCSection *DataBSSSection;
180 MCSection *FourByteConstantSection;
181 MCSection *EightByteConstantSection;
182 MCSection *SixteenByteConstantSection;
183 MCSection *LazySymbolPointerSection;
184 MCSection *NonLazySymbolPointerSection;
186 /// COFF specific sections.
187 MCSection *DrectveSection;
188 MCSection *PDataSection;
189 MCSection *XDataSection;
190 MCSection *SXDataSection;
193 void InitMCObjectFileInfo(const Triple &TT, Reloc::Model RM,
194 CodeModel::Model CM, MCContext &ctx);
195 LLVM_ATTRIBUTE_DEPRECATED(
196 void InitMCObjectFileInfo(StringRef TT, Reloc::Model RM,
197 CodeModel::Model CM, MCContext &ctx),
198 "StringRef GNU Triple argument replaced by a llvm::Triple object");
200 bool getSupportsWeakOmittedEHFrame() const {
201 return SupportsWeakOmittedEHFrame;
203 bool getSupportsCompactUnwindWithoutEHFrame() const {
204 return SupportsCompactUnwindWithoutEHFrame;
206 bool getOmitDwarfIfHaveCompactUnwind() const {
207 return OmitDwarfIfHaveCompactUnwind;
210 bool getCommDirectiveSupportsAlignment() const {
211 return CommDirectiveSupportsAlignment;
214 unsigned getPersonalityEncoding() const { return PersonalityEncoding; }
215 unsigned getLSDAEncoding() const { return LSDAEncoding; }
216 unsigned getFDEEncoding() const { return FDECFIEncoding; }
217 unsigned getTTypeEncoding() const { return TTypeEncoding; }
219 unsigned getCompactUnwindDwarfEHFrameOnly() const {
220 return CompactUnwindDwarfEHFrameOnly;
223 MCSection *getTextSection() const { return TextSection; }
224 MCSection *getDataSection() const { return DataSection; }
225 MCSection *getBSSSection() const { return BSSSection; }
226 MCSection *getReadOnlySection() const { return ReadOnlySection; }
227 MCSection *getLSDASection() const { return LSDASection; }
228 MCSection *getCompactUnwindSection() const { return CompactUnwindSection; }
229 MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
230 MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
231 MCSection *getDwarfLineSection() const { return DwarfLineSection; }
232 MCSection *getDwarfFrameSection() const { return DwarfFrameSection; }
233 MCSection *getDwarfPubNamesSection() const { return DwarfPubNamesSection; }
234 MCSection *getDwarfPubTypesSection() const { return DwarfPubTypesSection; }
235 MCSection *getDwarfGnuPubNamesSection() const {
236 return DwarfGnuPubNamesSection;
238 MCSection *getDwarfGnuPubTypesSection() const {
239 return DwarfGnuPubTypesSection;
241 const MCSection *getDwarfDebugInlineSection() const {
242 return DwarfDebugInlineSection;
244 MCSection *getDwarfStrSection() const { return DwarfStrSection; }
245 MCSection *getDwarfLocSection() const { return DwarfLocSection; }
246 MCSection *getDwarfARangesSection() const { return DwarfARangesSection; }
247 MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
249 // DWARF5 Experimental Debug Info Sections
250 MCSection *getDwarfAccelNamesSection() const {
251 return DwarfAccelNamesSection;
253 MCSection *getDwarfAccelObjCSection() const { return DwarfAccelObjCSection; }
254 MCSection *getDwarfAccelNamespaceSection() const {
255 return DwarfAccelNamespaceSection;
257 MCSection *getDwarfAccelTypesSection() const {
258 return DwarfAccelTypesSection;
260 MCSection *getDwarfInfoDWOSection() const { return DwarfInfoDWOSection; }
261 MCSection *getDwarfTypesSection(uint64_t Hash) const;
262 MCSection *getDwarfTypesDWOSection() const { return DwarfTypesDWOSection; }
263 MCSection *getDwarfAbbrevDWOSection() const { return DwarfAbbrevDWOSection; }
264 MCSection *getDwarfStrDWOSection() const { return DwarfStrDWOSection; }
265 MCSection *getDwarfLineDWOSection() const { return DwarfLineDWOSection; }
266 MCSection *getDwarfLocDWOSection() const { return DwarfLocDWOSection; }
267 MCSection *getDwarfStrOffDWOSection() const { return DwarfStrOffDWOSection; }
268 MCSection *getDwarfAddrSection() const { return DwarfAddrSection; }
269 MCSection *getDwarfCUIndexSection() const { return DwarfCUIndexSection; }
270 MCSection *getDwarfTUIndexSection() const { return DwarfTUIndexSection; }
272 MCSection *getCOFFDebugSymbolsSection() const {
273 return COFFDebugSymbolsSection;
276 MCSection *getTLSExtraDataSection() const { return TLSExtraDataSection; }
277 const MCSection *getTLSDataSection() const { return TLSDataSection; }
278 MCSection *getTLSBSSSection() const { return TLSBSSSection; }
280 MCSection *getStackMapSection() const { return StackMapSection; }
281 MCSection *getFaultMapSection() const { return FaultMapSection; }
283 // ELF specific sections.
284 MCSection *getDataRelROSection() const { return DataRelROSection; }
285 const MCSection *getMergeableConst4Section() const {
286 return MergeableConst4Section;
288 const MCSection *getMergeableConst8Section() const {
289 return MergeableConst8Section;
291 const MCSection *getMergeableConst16Section() const {
292 return MergeableConst16Section;
295 // MachO specific sections.
296 const MCSection *getTLSTLVSection() const { return TLSTLVSection; }
297 const MCSection *getTLSThreadInitSection() const {
298 return TLSThreadInitSection;
300 const MCSection *getCStringSection() const { return CStringSection; }
301 const MCSection *getUStringSection() const { return UStringSection; }
302 MCSection *getTextCoalSection() const { return TextCoalSection; }
303 const MCSection *getConstTextCoalSection() const {
304 return ConstTextCoalSection;
306 const MCSection *getConstDataSection() const { return ConstDataSection; }
307 const MCSection *getDataCoalSection() const { return DataCoalSection; }
308 const MCSection *getDataCommonSection() const { return DataCommonSection; }
309 MCSection *getDataBSSSection() const { return DataBSSSection; }
310 const MCSection *getFourByteConstantSection() const {
311 return FourByteConstantSection;
313 const MCSection *getEightByteConstantSection() const {
314 return EightByteConstantSection;
316 const MCSection *getSixteenByteConstantSection() const {
317 return SixteenByteConstantSection;
319 MCSection *getLazySymbolPointerSection() const {
320 return LazySymbolPointerSection;
322 MCSection *getNonLazySymbolPointerSection() const {
323 return NonLazySymbolPointerSection;
326 // COFF specific sections.
327 MCSection *getDrectveSection() const { return DrectveSection; }
328 MCSection *getPDataSection() const { return PDataSection; }
329 MCSection *getXDataSection() const { return XDataSection; }
330 MCSection *getSXDataSection() const { return SXDataSection; }
332 MCSection *getEHFrameSection() {
333 return EHFrameSection;
336 enum Environment { IsMachO, IsELF, IsCOFF };
337 Environment getObjectFileType() const { return Env; }
339 Reloc::Model getRelocM() const { return RelocM; }
344 CodeModel::Model CMModel;
348 void initMachOMCObjectFileInfo(Triple T);
349 void initELFMCObjectFileInfo(Triple T);
350 void initCOFFMCObjectFileInfo(Triple T);
353 const Triple &getTargetTriple() const { return TT; }
356 } // end namespace llvm