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 /// If exception handling is supported by the target, this is the section the
69 /// Language Specific Data Area information is emitted to.
70 MCSection *LSDASection;
72 /// If exception handling is supported by the target and the target can
73 /// support a compact representation of the CIE and FDE, this is the section
74 /// to emit them into.
75 MCSection *CompactUnwindSection;
77 // Dwarf sections for debug info. If a target supports debug info, these must
79 MCSection *DwarfAbbrevSection;
80 MCSection *DwarfInfoSection;
81 MCSection *DwarfLineSection;
82 MCSection *DwarfFrameSection;
83 MCSection *DwarfPubTypesSection;
84 const MCSection *DwarfDebugInlineSection;
85 MCSection *DwarfStrSection;
86 MCSection *DwarfLocSection;
87 MCSection *DwarfARangesSection;
88 MCSection *DwarfRangesSection;
89 MCSection *DwarfMacinfoSection;
90 // The pubnames section is no longer generated by default. The generation
91 // can be enabled by a compiler flag.
92 MCSection *DwarfPubNamesSection;
94 /// DWARF5 Experimental Debug Info Sections
95 /// DwarfAccelNamesSection, DwarfAccelObjCSection,
96 /// DwarfAccelNamespaceSection, DwarfAccelTypesSection -
97 /// If we use the DWARF accelerated hash tables then we want to emit these
99 MCSection *DwarfAccelNamesSection;
100 MCSection *DwarfAccelObjCSection;
101 MCSection *DwarfAccelNamespaceSection;
102 MCSection *DwarfAccelTypesSection;
104 // These are used for the Fission separate debug information files.
105 MCSection *DwarfInfoDWOSection;
106 MCSection *DwarfTypesDWOSection;
107 MCSection *DwarfAbbrevDWOSection;
108 MCSection *DwarfStrDWOSection;
109 MCSection *DwarfLineDWOSection;
110 MCSection *DwarfLocDWOSection;
111 MCSection *DwarfStrOffDWOSection;
112 MCSection *DwarfAddrSection;
114 // These are for Fission DWP files.
115 MCSection *DwarfCUIndexSection;
116 MCSection *DwarfTUIndexSection;
118 /// Section for newer gnu pubnames.
119 MCSection *DwarfGnuPubNamesSection;
120 /// Section for newer gnu pubtypes.
121 MCSection *DwarfGnuPubTypesSection;
123 MCSection *COFFDebugSymbolsSection;
124 MCSection *COFFDebugTypesSection;
126 /// Extra TLS Variable Data section.
128 /// If the target needs to put additional information for a TLS variable,
130 MCSection *TLSExtraDataSection;
132 /// Section directive for Thread Local data. ELF, MachO and COFF.
133 MCSection *TLSDataSection; // Defaults to ".tdata".
135 /// Section directive for Thread Local uninitialized data.
137 /// Null if this target doesn't support a BSS section. ELF and MachO only.
138 MCSection *TLSBSSSection; // Defaults to ".tbss".
140 /// StackMap section.
141 MCSection *StackMapSection;
143 /// FaultMap section.
144 MCSection *FaultMapSection;
146 /// EH frame section.
148 /// It is initialized on demand so it can be overwritten (with uniquing).
149 MCSection *EHFrameSection;
151 // ELF specific sections.
152 MCSection *DataRelROSection;
153 MCSection *MergeableConst4Section;
154 MCSection *MergeableConst8Section;
155 MCSection *MergeableConst16Section;
156 MCSection *MergeableConst32Section;
158 // MachO specific sections.
160 /// Section for thread local structure information.
162 /// Contains the source code name of the variable, visibility and a pointer to
163 /// the initial value (.tdata or .tbss).
164 MCSection *TLSTLVSection; // Defaults to ".tlv".
166 /// Section for thread local data initialization functions.
167 const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func".
169 MCSection *CStringSection;
170 MCSection *UStringSection;
171 MCSection *TextCoalSection;
172 MCSection *ConstTextCoalSection;
173 MCSection *ConstDataSection;
174 MCSection *DataCoalSection;
175 MCSection *DataCommonSection;
176 MCSection *DataBSSSection;
177 MCSection *FourByteConstantSection;
178 MCSection *EightByteConstantSection;
179 MCSection *SixteenByteConstantSection;
180 MCSection *LazySymbolPointerSection;
181 MCSection *NonLazySymbolPointerSection;
182 MCSection *ThreadLocalPointerSection;
184 /// COFF specific sections.
185 MCSection *DrectveSection;
186 MCSection *PDataSection;
187 MCSection *XDataSection;
188 MCSection *SXDataSection;
191 void InitMCObjectFileInfo(const Triple &TT, bool PIC, CodeModel::Model CM,
194 bool getSupportsWeakOmittedEHFrame() const {
195 return SupportsWeakOmittedEHFrame;
197 bool getSupportsCompactUnwindWithoutEHFrame() const {
198 return SupportsCompactUnwindWithoutEHFrame;
200 bool getOmitDwarfIfHaveCompactUnwind() const {
201 return OmitDwarfIfHaveCompactUnwind;
204 bool getCommDirectiveSupportsAlignment() const {
205 return CommDirectiveSupportsAlignment;
208 unsigned getPersonalityEncoding() const { return PersonalityEncoding; }
209 unsigned getLSDAEncoding() const { return LSDAEncoding; }
210 unsigned getFDEEncoding() const { return FDECFIEncoding; }
211 unsigned getTTypeEncoding() const { return TTypeEncoding; }
213 unsigned getCompactUnwindDwarfEHFrameOnly() const {
214 return CompactUnwindDwarfEHFrameOnly;
217 MCSection *getTextSection() const { return TextSection; }
218 MCSection *getDataSection() const { return DataSection; }
219 MCSection *getBSSSection() const { return BSSSection; }
220 MCSection *getReadOnlySection() const { return ReadOnlySection; }
221 MCSection *getLSDASection() const { return LSDASection; }
222 MCSection *getCompactUnwindSection() const { return CompactUnwindSection; }
223 MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
224 MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
225 MCSection *getDwarfLineSection() const { return DwarfLineSection; }
226 MCSection *getDwarfFrameSection() const { return DwarfFrameSection; }
227 MCSection *getDwarfPubNamesSection() const { return DwarfPubNamesSection; }
228 MCSection *getDwarfPubTypesSection() const { return DwarfPubTypesSection; }
229 MCSection *getDwarfGnuPubNamesSection() const {
230 return DwarfGnuPubNamesSection;
232 MCSection *getDwarfGnuPubTypesSection() const {
233 return DwarfGnuPubTypesSection;
235 const MCSection *getDwarfDebugInlineSection() const {
236 return DwarfDebugInlineSection;
238 MCSection *getDwarfStrSection() const { return DwarfStrSection; }
239 MCSection *getDwarfLocSection() const { return DwarfLocSection; }
240 MCSection *getDwarfARangesSection() const { return DwarfARangesSection; }
241 MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
242 MCSection *getDwarfMacinfoSection() const { return DwarfMacinfoSection; }
244 // DWARF5 Experimental Debug Info Sections
245 MCSection *getDwarfAccelNamesSection() const {
246 return DwarfAccelNamesSection;
248 MCSection *getDwarfAccelObjCSection() const { return DwarfAccelObjCSection; }
249 MCSection *getDwarfAccelNamespaceSection() const {
250 return DwarfAccelNamespaceSection;
252 MCSection *getDwarfAccelTypesSection() const {
253 return DwarfAccelTypesSection;
255 MCSection *getDwarfInfoDWOSection() const { return DwarfInfoDWOSection; }
256 MCSection *getDwarfTypesSection(uint64_t Hash) const;
257 MCSection *getDwarfTypesDWOSection() const { return DwarfTypesDWOSection; }
258 MCSection *getDwarfAbbrevDWOSection() const { return DwarfAbbrevDWOSection; }
259 MCSection *getDwarfStrDWOSection() const { return DwarfStrDWOSection; }
260 MCSection *getDwarfLineDWOSection() const { return DwarfLineDWOSection; }
261 MCSection *getDwarfLocDWOSection() const { return DwarfLocDWOSection; }
262 MCSection *getDwarfStrOffDWOSection() const { return DwarfStrOffDWOSection; }
263 MCSection *getDwarfAddrSection() const { return DwarfAddrSection; }
264 MCSection *getDwarfCUIndexSection() const { return DwarfCUIndexSection; }
265 MCSection *getDwarfTUIndexSection() const { return DwarfTUIndexSection; }
267 MCSection *getCOFFDebugSymbolsSection() const {
268 return COFFDebugSymbolsSection;
270 MCSection *getCOFFDebugTypesSection() const {
271 return COFFDebugTypesSection;
275 MCSection *getTLSExtraDataSection() const { return TLSExtraDataSection; }
276 const MCSection *getTLSDataSection() const { return TLSDataSection; }
277 MCSection *getTLSBSSSection() const { return TLSBSSSection; }
279 MCSection *getStackMapSection() const { return StackMapSection; }
280 MCSection *getFaultMapSection() const { return FaultMapSection; }
282 // ELF specific sections.
283 MCSection *getDataRelROSection() const { return DataRelROSection; }
284 const MCSection *getMergeableConst4Section() const {
285 return MergeableConst4Section;
287 const MCSection *getMergeableConst8Section() const {
288 return MergeableConst8Section;
290 const MCSection *getMergeableConst16Section() const {
291 return MergeableConst16Section;
293 const MCSection *getMergeableConst32Section() const {
294 return MergeableConst32Section;
297 // MachO specific sections.
298 const MCSection *getTLSTLVSection() const { return TLSTLVSection; }
299 const MCSection *getTLSThreadInitSection() const {
300 return TLSThreadInitSection;
302 const MCSection *getCStringSection() const { return CStringSection; }
303 const MCSection *getUStringSection() const { return UStringSection; }
304 MCSection *getTextCoalSection() const { return TextCoalSection; }
305 const MCSection *getConstTextCoalSection() const {
306 return ConstTextCoalSection;
308 const MCSection *getConstDataSection() const { return ConstDataSection; }
309 const MCSection *getDataCoalSection() const { return DataCoalSection; }
310 const MCSection *getDataCommonSection() const { return DataCommonSection; }
311 MCSection *getDataBSSSection() const { return DataBSSSection; }
312 const MCSection *getFourByteConstantSection() const {
313 return FourByteConstantSection;
315 const MCSection *getEightByteConstantSection() const {
316 return EightByteConstantSection;
318 const MCSection *getSixteenByteConstantSection() const {
319 return SixteenByteConstantSection;
321 MCSection *getLazySymbolPointerSection() const {
322 return LazySymbolPointerSection;
324 MCSection *getNonLazySymbolPointerSection() const {
325 return NonLazySymbolPointerSection;
327 MCSection *getThreadLocalPointerSection() const {
328 return ThreadLocalPointerSection;
331 // COFF specific sections.
332 MCSection *getDrectveSection() const { return DrectveSection; }
333 MCSection *getPDataSection() const { return PDataSection; }
334 MCSection *getXDataSection() const { return XDataSection; }
335 MCSection *getSXDataSection() const { return SXDataSection; }
337 MCSection *getEHFrameSection() {
338 return EHFrameSection;
341 enum Environment { IsMachO, IsELF, IsCOFF };
342 Environment getObjectFileType() const { return Env; }
344 bool isPositionIndependent() const { return PositionIndependent; }
348 bool PositionIndependent;
349 CodeModel::Model CMModel;
353 void initMachOMCObjectFileInfo(const Triple &T);
354 void initELFMCObjectFileInfo(const Triple &T);
355 void initCOFFMCObjectFileInfo(const Triple &T);
358 const Triple &getTargetTriple() const { return TT; }
361 } // end namespace llvm