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_MCBJECTFILEINFO_H
15 #define LLVM_MC_MCBJECTFILEINFO_H
17 #include "llvm/Support/CodeGen.h"
25 class MCObjectFileInfo {
27 /// CommDirectiveSupportsAlignment - True if .comm supports alignment. This
28 /// is a hack for as long as we support 10.4 Tiger, whose assembler doesn't
29 /// support alignment on comm.
30 bool CommDirectiveSupportsAlignment;
32 /// SupportsWeakEmptyEHFrame - True if target object file supports a
33 /// weak_definition of constant 0 for an omitted EH frame.
34 bool SupportsWeakOmittedEHFrame;
36 /// IsFunctionEHFrameSymbolPrivate - This flag is set to true if the
37 /// "EH_frame" symbol for EH information should be an assembler temporary (aka
38 /// private linkage, aka an L or .L label) or false if it should be a normal
39 /// non-.globl label. This defaults to true.
40 bool IsFunctionEHFrameSymbolPrivate;
42 /// PersonalityEncoding, LSDAEncoding, FDEEncoding, TTypeEncoding - Some
43 /// encoding values for EH.
44 unsigned PersonalityEncoding;
45 unsigned LSDAEncoding;
47 unsigned FDECFIEncoding;
48 unsigned TTypeEncoding;
49 // Section flags for eh_frame
50 unsigned EHSectionType;
51 unsigned EHSectionFlags;
53 /// TextSection - Section directive for standard text.
55 const MCSection *TextSection;
57 /// DataSection - Section directive for standard data.
59 const MCSection *DataSection;
61 /// BSSSection - Section that is default initialized to zero.
62 const MCSection *BSSSection;
64 /// ReadOnlySection - Section that is readonly and can contain arbitrary
65 /// initialized data. Targets are not required to have a readonly section.
66 /// If they don't, various bits of code will fall back to using the data
67 /// section for constants.
68 const MCSection *ReadOnlySection;
70 /// StaticCtorSection - This section contains the static constructor pointer
72 const MCSection *StaticCtorSection;
74 /// StaticDtorSection - This section contains the static destructor pointer
76 const MCSection *StaticDtorSection;
78 /// LSDASection - If exception handling is supported by the target, this is
79 /// the section the Language Specific Data Area information is emitted to.
80 const MCSection *LSDASection;
82 /// CompactUnwindSection - If exception handling is supported by the target
83 /// and the target can support a compact representation of the CIE and FDE,
84 /// this is the section to emit them into.
85 const MCSection *CompactUnwindSection;
87 // Dwarf sections for debug info. If a target supports debug info, these must
89 const MCSection *DwarfAbbrevSection;
90 const MCSection *DwarfInfoSection;
91 const MCSection *DwarfLineSection;
92 const MCSection *DwarfFrameSection;
93 const MCSection *DwarfPubTypesSection;
94 const MCSection *DwarfDebugInlineSection;
95 const MCSection *DwarfStrSection;
96 const MCSection *DwarfLocSection;
97 const MCSection *DwarfARangesSection;
98 const MCSection *DwarfRangesSection;
99 const MCSection *DwarfMacroInfoSection;
101 // DWARF5 Experimental Debug Info Sections
102 /// DwarfAccelNamesSection, DwarfAccelObjCSection,
103 /// DwarfAccelNamespaceSection, DwarfAccelTypesSection -
104 /// If we use the DWARF accelerated hash tables then we want to emit these
106 const MCSection *DwarfAccelNamesSection;
107 const MCSection *DwarfAccelObjCSection;
108 const MCSection *DwarfAccelNamespaceSection;
109 const MCSection *DwarfAccelTypesSection;
111 /// These are used for the Fission separate debug information files.
112 const MCSection *DwarfInfoDWOSection;
113 const MCSection *DwarfAbbrevDWOSection;
114 const MCSection *DwarfStrDWOSection;
115 const MCSection *DwarfLineDWOSection;
116 const MCSection *DwarfLocDWOSection;
117 const MCSection *DwarfStrOffDWOSection;
118 const MCSection *DwarfAddrSection;
120 // Extra TLS Variable Data section. If the target needs to put additional
121 // information for a TLS variable, it'll go here.
122 const MCSection *TLSExtraDataSection;
124 /// TLSDataSection - Section directive for Thread Local data.
125 /// ELF, MachO and COFF.
126 const MCSection *TLSDataSection; // Defaults to ".tdata".
128 /// TLSBSSSection - Section directive for Thread Local uninitialized data.
129 /// Null if this target doesn't support a BSS section.
130 /// ELF and MachO only.
131 const MCSection *TLSBSSSection; // Defaults to ".tbss".
134 /// EHFrameSection - EH frame section. It is initialized on demand so it
135 /// can be overwritten (with uniquing).
136 const MCSection *EHFrameSection;
138 /// ELF specific sections.
140 const MCSection *DataRelSection;
141 const MCSection *DataRelLocalSection;
142 const MCSection *DataRelROSection;
143 const MCSection *DataRelROLocalSection;
144 const MCSection *MergeableConst4Section;
145 const MCSection *MergeableConst8Section;
146 const MCSection *MergeableConst16Section;
148 /// MachO specific sections.
151 /// TLSTLVSection - Section for thread local structure information.
152 /// Contains the source code name of the variable, visibility and a pointer
153 /// to the initial value (.tdata or .tbss).
154 const MCSection *TLSTLVSection; // Defaults to ".tlv".
156 /// TLSThreadInitSection - Section for thread local data initialization
158 const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func".
160 const MCSection *CStringSection;
161 const MCSection *UStringSection;
162 const MCSection *TextCoalSection;
163 const MCSection *ConstTextCoalSection;
164 const MCSection *ConstDataSection;
165 const MCSection *DataCoalSection;
166 const MCSection *DataCommonSection;
167 const MCSection *DataBSSSection;
168 const MCSection *FourByteConstantSection;
169 const MCSection *EightByteConstantSection;
170 const MCSection *SixteenByteConstantSection;
171 const MCSection *LazySymbolPointerSection;
172 const MCSection *NonLazySymbolPointerSection;
174 /// COFF specific sections.
176 const MCSection *DrectveSection;
177 const MCSection *PDataSection;
178 const MCSection *XDataSection;
181 void InitMCObjectFileInfo(StringRef TT, Reloc::Model RM, CodeModel::Model CM,
184 bool isFunctionEHFrameSymbolPrivate() const {
185 return IsFunctionEHFrameSymbolPrivate;
187 bool getSupportsWeakOmittedEHFrame() const {
188 return SupportsWeakOmittedEHFrame;
190 bool getCommDirectiveSupportsAlignment() const {
191 return CommDirectiveSupportsAlignment;
194 unsigned getPersonalityEncoding() const { return PersonalityEncoding; }
195 unsigned getLSDAEncoding() const { return LSDAEncoding; }
196 unsigned getFDEEncoding(bool CFI) const {
197 return CFI ? FDECFIEncoding : FDEEncoding;
199 unsigned getTTypeEncoding() const { return TTypeEncoding; }
201 const MCSection *getTextSection() const { return TextSection; }
202 const MCSection *getDataSection() const { return DataSection; }
203 const MCSection *getBSSSection() const { return BSSSection; }
204 const MCSection *getLSDASection() const { return LSDASection; }
205 const MCSection *getCompactUnwindSection() const{
206 return CompactUnwindSection;
208 const MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
209 const MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
210 const MCSection *getDwarfLineSection() const { return DwarfLineSection; }
211 const MCSection *getDwarfFrameSection() const { return DwarfFrameSection; }
212 const MCSection *getDwarfPubTypesSection() const{return DwarfPubTypesSection;}
213 const MCSection *getDwarfDebugInlineSection() const {
214 return DwarfDebugInlineSection;
216 const MCSection *getDwarfStrSection() const { return DwarfStrSection; }
217 const MCSection *getDwarfLocSection() const { return DwarfLocSection; }
218 const MCSection *getDwarfARangesSection() const { return DwarfARangesSection;}
219 const MCSection *getDwarfRangesSection() const { return DwarfRangesSection; }
220 const MCSection *getDwarfMacroInfoSection() const {
221 return DwarfMacroInfoSection;
224 // DWARF5 Experimental Debug Info Sections
225 const MCSection *getDwarfAccelNamesSection() const {
226 return DwarfAccelNamesSection;
228 const MCSection *getDwarfAccelObjCSection() const {
229 return DwarfAccelObjCSection;
231 const MCSection *getDwarfAccelNamespaceSection() const {
232 return DwarfAccelNamespaceSection;
234 const MCSection *getDwarfAccelTypesSection() const {
235 return DwarfAccelTypesSection;
237 const MCSection *getDwarfInfoDWOSection() const {
238 return DwarfInfoDWOSection;
240 const MCSection *getDwarfAbbrevDWOSection() const {
241 return DwarfAbbrevDWOSection;
243 const MCSection *getDwarfStrDWOSection() const {
244 return DwarfStrDWOSection;
246 const MCSection *getDwarfLineDWOSection() const {
247 return DwarfLineDWOSection;
249 const MCSection *getDwarfLocDWOSection() const {
250 return DwarfLocDWOSection;
252 const MCSection *getDwarfStrOffDWOSection() const {
253 return DwarfStrOffDWOSection;
255 const MCSection *getDwarfAddrSection() const {
256 return DwarfAddrSection;
259 const MCSection *getTLSExtraDataSection() const {
260 return TLSExtraDataSection;
262 const MCSection *getTLSDataSection() const { return TLSDataSection; }
263 const MCSection *getTLSBSSSection() const { return TLSBSSSection; }
265 /// ELF specific sections.
267 const MCSection *getDataRelSection() const { return DataRelSection; }
268 const MCSection *getDataRelLocalSection() const {
269 return DataRelLocalSection;
271 const MCSection *getDataRelROSection() const { return DataRelROSection; }
272 const MCSection *getDataRelROLocalSection() const {
273 return DataRelROLocalSection;
275 const MCSection *getMergeableConst4Section() const {
276 return MergeableConst4Section;
278 const MCSection *getMergeableConst8Section() const {
279 return MergeableConst8Section;
281 const MCSection *getMergeableConst16Section() const {
282 return MergeableConst16Section;
285 /// MachO specific sections.
287 const MCSection *getTLSTLVSection() const { return TLSTLVSection; }
288 const MCSection *getTLSThreadInitSection() const {
289 return TLSThreadInitSection;
291 const MCSection *getCStringSection() const { return CStringSection; }
292 const MCSection *getUStringSection() const { return UStringSection; }
293 const MCSection *getTextCoalSection() const { return TextCoalSection; }
294 const MCSection *getConstTextCoalSection() const {
295 return ConstTextCoalSection;
297 const MCSection *getConstDataSection() const { return ConstDataSection; }
298 const MCSection *getDataCoalSection() const { return DataCoalSection; }
299 const MCSection *getDataCommonSection() const { return DataCommonSection; }
300 const MCSection *getDataBSSSection() const { return DataBSSSection; }
301 const MCSection *getFourByteConstantSection() const {
302 return FourByteConstantSection;
304 const MCSection *getEightByteConstantSection() const {
305 return EightByteConstantSection;
307 const MCSection *getSixteenByteConstantSection() const {
308 return SixteenByteConstantSection;
310 const MCSection *getLazySymbolPointerSection() const {
311 return LazySymbolPointerSection;
313 const MCSection *getNonLazySymbolPointerSection() const {
314 return NonLazySymbolPointerSection;
317 /// COFF specific sections.
319 const MCSection *getDrectveSection() const { return DrectveSection; }
320 const MCSection *getPDataSection() const { return PDataSection; }
321 const MCSection *getXDataSection() const { return XDataSection; }
323 const MCSection *getEHFrameSection() {
325 InitEHFrameSection();
326 return EHFrameSection;
330 enum Environment { IsMachO, IsELF, IsCOFF };
333 CodeModel::Model CMModel;
336 void InitMachOMCObjectFileInfo(Triple T);
337 void InitELFMCObjectFileInfo(Triple T);
338 void InitCOFFMCObjectFileInfo(Triple T);
340 /// InitEHFrameSection - Initialize EHFrameSection on demand.
342 void InitEHFrameSection();
345 } // end namespace llvm