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gerrit-public.fairphone.software / toolchain / llvm-project / dd69ef38dba72b08bee83f262fd443743940d2bc / . / llvm / lib / MC / MCObjectFileInfo.cpp
blob: da707d860a6a0ef532c1256736f6414828e3a7fa [file] [log] [blame]
Evan Cheng76792992011-07-20 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"
David Blaikiebc563272013-12-13 21:33:40 +0000[diff] [blame]11#include "llvm/ADT/StringExtras.h"
Chandler Carruth8a8cd2b2014-01-07 11:48:04 +0000[diff] [blame]12#include "llvm/ADT/Triple.h"
Joerg Sonnenberger94cbb662014-05-13 17:58:13 +0000[diff] [blame]13#include "llvm/MC/MCAsmInfo.h"
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]14#include "llvm/MC/MCContext.h"
15#include "llvm/MC/MCSection.h"
16#include "llvm/MC/MCSectionCOFF.h"
17#include "llvm/MC/MCSectionELF.h"
18#include "llvm/MC/MCSectionMachO.h"
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]19using namespace llvm;
20
Rafael Espindolabecdf632014-06-20 22:37:01 +0000[diff] [blame]21static bool useCompactUnwind(const Triple &T) {
22 // Only on darwin.
23 if (!T.isOSDarwin())
24 return false;
25
26 // aarch64 always has it.
Tim Northovere19bed72014-07-23 12:32:47 +0000[diff] [blame]27 if (T.getArch() == Triple::aarch64)
Rafael Espindolabecdf632014-06-20 22:37:01 +0000[diff] [blame]28 return true;
29
30 // Use it on newer version of OS X.
31 if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
32 return true;
33
Rafael Espindolac3510c72014-06-20 22:40:55 +0000[diff] [blame]34 // And the iOS simulator.
35 if (T.isiOS() &&
36 (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86))
37 return true;
38
Rafael Espindolabecdf632014-06-20 22:37:01 +0000[diff] [blame]39 return false;
40}
41
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]42void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
43 // MachO
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]44 SupportsWeakOmittedEHFrame = false;
45
Tim Northovere19bed72014-07-23 12:32:47 +0000[diff] [blame]46 if (T.isOSDarwin() && T.getArch() == Triple::aarch64)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]47 SupportsCompactUnwindWithoutEHFrame = true;
48
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]49 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
50 | dwarf::DW_EH_PE_sdata4;
Rafael Espindolaaa7851d2014-05-12 13:47:05 +0000[diff] [blame]51 LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]52 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
53 dwarf::DW_EH_PE_sdata4;
54
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]55 // .comm doesn't support alignment before Leopard.
56 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
57 CommDirectiveSupportsAlignment = false;
58
59 TextSection // .text
60 = Ctx->getMachOSection("__TEXT", "__text",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]61 MachO::S_ATTR_PURE_INSTRUCTIONS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]62 SectionKind::getText());
63 DataSection // .data
64 = Ctx->getMachOSection("__DATA", "__data", 0,
65 SectionKind::getDataRel());
66
NAKAMURA Takumi68fa6f92013-09-21 02:34:45 +0000[diff] [blame]67 // BSSSection might not be expected initialized on msvc.
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]68 BSSSection = nullptr;
NAKAMURA Takumi68fa6f92013-09-21 02:34:45 +0000[diff] [blame]69
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]70 TLSDataSection // .tdata
71 = Ctx->getMachOSection("__DATA", "__thread_data",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]72 MachO::S_THREAD_LOCAL_REGULAR,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]73 SectionKind::getDataRel());
74 TLSBSSSection // .tbss
75 = Ctx->getMachOSection("__DATA", "__thread_bss",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]76 MachO::S_THREAD_LOCAL_ZEROFILL,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]77 SectionKind::getThreadBSS());
78
79 // TODO: Verify datarel below.
80 TLSTLVSection // .tlv
81 = Ctx->getMachOSection("__DATA", "__thread_vars",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]82 MachO::S_THREAD_LOCAL_VARIABLES,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]83 SectionKind::getDataRel());
84
85 TLSThreadInitSection
86 = Ctx->getMachOSection("__DATA", "__thread_init",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]87 MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
Jim Grosbach0dde3492011-11-15 16:46:22 +0000[diff] [blame]88 SectionKind::getDataRel());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]89
90 CStringSection // .cstring
91 = Ctx->getMachOSection("__TEXT", "__cstring",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]92 MachO::S_CSTRING_LITERALS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]93 SectionKind::getMergeable1ByteCString());
94 UStringSection
95 = Ctx->getMachOSection("__TEXT","__ustring", 0,
96 SectionKind::getMergeable2ByteCString());
97 FourByteConstantSection // .literal4
98 = Ctx->getMachOSection("__TEXT", "__literal4",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]99 MachO::S_4BYTE_LITERALS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]100 SectionKind::getMergeableConst4());
101 EightByteConstantSection // .literal8
102 = Ctx->getMachOSection("__TEXT", "__literal8",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]103 MachO::S_8BYTE_LITERALS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]104 SectionKind::getMergeableConst8());
105
Rafael Espindola1f3de492014-02-13 23:16:11 +0000[diff] [blame]106 SixteenByteConstantSection // .literal16
107 = Ctx->getMachOSection("__TEXT", "__literal16",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]108 MachO::S_16BYTE_LITERALS,
Rafael Espindola1f3de492014-02-13 23:16:11 +0000[diff] [blame]109 SectionKind::getMergeableConst16());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]110
111 ReadOnlySection // .const
112 = Ctx->getMachOSection("__TEXT", "__const", 0,
113 SectionKind::getReadOnly());
114
115 TextCoalSection
116 = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]117 MachO::S_COALESCED |
118 MachO::S_ATTR_PURE_INSTRUCTIONS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]119 SectionKind::getText());
120 ConstTextCoalSection
121 = Ctx->getMachOSection("__TEXT", "__const_coal",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]122 MachO::S_COALESCED,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]123 SectionKind::getReadOnly());
124 ConstDataSection // .const_data
125 = Ctx->getMachOSection("__DATA", "__const", 0,
126 SectionKind::getReadOnlyWithRel());
127 DataCoalSection
128 = Ctx->getMachOSection("__DATA","__datacoal_nt",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]129 MachO::S_COALESCED,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]130 SectionKind::getDataRel());
131 DataCommonSection
132 = Ctx->getMachOSection("__DATA","__common",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]133 MachO::S_ZEROFILL,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]134 SectionKind::getBSS());
135 DataBSSSection
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]136 = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]137 SectionKind::getBSS());
138
139
140 LazySymbolPointerSection
141 = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]142 MachO::S_LAZY_SYMBOL_POINTERS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]143 SectionKind::getMetadata());
144 NonLazySymbolPointerSection
145 = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]146 MachO::S_NON_LAZY_SYMBOL_POINTERS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]147 SectionKind::getMetadata());
148
149 if (RelocM == Reloc::Static) {
150 StaticCtorSection
151 = Ctx->getMachOSection("__TEXT", "__constructor", 0,
152 SectionKind::getDataRel());
153 StaticDtorSection
154 = Ctx->getMachOSection("__TEXT", "__destructor", 0,
155 SectionKind::getDataRel());
156 } else {
157 StaticCtorSection
158 = Ctx->getMachOSection("__DATA", "__mod_init_func",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]159 MachO::S_MOD_INIT_FUNC_POINTERS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]160 SectionKind::getDataRel());
161 StaticDtorSection
162 = Ctx->getMachOSection("__DATA", "__mod_term_func",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]163 MachO::S_MOD_TERM_FUNC_POINTERS,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]164 SectionKind::getDataRel());
165 }
166
167 // Exception Handling.
168 LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
169 SectionKind::getReadOnlyWithRel());
170
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]171 COFFDebugSymbolsSection = nullptr;
Timur Iskhodzhanovf166f6c2014-01-30 01:39:17 +0000[diff] [blame]172
Rafael Espindolabecdf632014-06-20 22:37:01 +0000[diff] [blame]173 if (useCompactUnwind(T)) {
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]174 CompactUnwindSection =
Rafael Espindolabecdf632014-06-20 22:37:01 +0000[diff] [blame]175 Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG,
176 SectionKind::getReadOnly());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]177
Bill Wendling2d1df6b2013-04-10 21:42:06 +0000[diff] [blame]178 if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
179 CompactUnwindDwarfEHFrameOnly = 0x04000000;
Tim Northovere19bed72014-07-23 12:32:47 +0000[diff] [blame]180 else if (T.getArch() == Triple::aarch64)
Tim Northover00ed9962014-03-29 10:18:08 +0000[diff] [blame]181 CompactUnwindDwarfEHFrameOnly = 0x03000000;
Bill Wendling2d1df6b2013-04-10 21:42:06 +0000[diff] [blame]182 }
183
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]184 // Debug Information.
Eric Christopher4996c702011-11-07 09:24:32 +0000[diff] [blame]185 DwarfAccelNamesSection =
186 Ctx->getMachOSection("__DWARF", "__apple_names",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]187 MachO::S_ATTR_DEBUG,
Eric Christopher4996c702011-11-07 09:24:32 +0000[diff] [blame]188 SectionKind::getMetadata());
189 DwarfAccelObjCSection =
190 Ctx->getMachOSection("__DWARF", "__apple_objc",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]191 MachO::S_ATTR_DEBUG,
Eric Christopher4996c702011-11-07 09:24:32 +0000[diff] [blame]192 SectionKind::getMetadata());
193 // 16 character section limit...
194 DwarfAccelNamespaceSection =
195 Ctx->getMachOSection("__DWARF", "__apple_namespac",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]196 MachO::S_ATTR_DEBUG,
Eric Christopher4996c702011-11-07 09:24:32 +0000[diff] [blame]197 SectionKind::getMetadata());
198 DwarfAccelTypesSection =
199 Ctx->getMachOSection("__DWARF", "__apple_types",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]200 MachO::S_ATTR_DEBUG,
Eric Christopher4996c702011-11-07 09:24:32 +0000[diff] [blame]201 SectionKind::getMetadata());
Jim Grosbachdc1e36e2012-05-11 01:41:30 +0000[diff] [blame]202
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]203 DwarfAbbrevSection =
204 Ctx->getMachOSection("__DWARF", "__debug_abbrev",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]205 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]206 SectionKind::getMetadata());
207 DwarfInfoSection =
208 Ctx->getMachOSection("__DWARF", "__debug_info",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]209 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]210 SectionKind::getMetadata());
211 DwarfLineSection =
212 Ctx->getMachOSection("__DWARF", "__debug_line",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]213 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]214 SectionKind::getMetadata());
215 DwarfFrameSection =
216 Ctx->getMachOSection("__DWARF", "__debug_frame",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]217 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]218 SectionKind::getMetadata());
Krzysztof Parzyszek228daa62013-02-12 18:00:14 +0000[diff] [blame]219 DwarfPubNamesSection =
220 Ctx->getMachOSection("__DWARF", "__debug_pubnames",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]221 MachO::S_ATTR_DEBUG,
Krzysztof Parzyszek228daa62013-02-12 18:00:14 +0000[diff] [blame]222 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]223 DwarfPubTypesSection =
224 Ctx->getMachOSection("__DWARF", "__debug_pubtypes",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]225 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]226 SectionKind::getMetadata());
Eric Christopherb0e76942013-09-09 20:03:14 +0000[diff] [blame]227 DwarfGnuPubNamesSection =
228 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]229 MachO::S_ATTR_DEBUG,
Eric Christopherb0e76942013-09-09 20:03:14 +0000[diff] [blame]230 SectionKind::getMetadata());
231 DwarfGnuPubTypesSection =
232 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]233 MachO::S_ATTR_DEBUG,
Eric Christopherb0e76942013-09-09 20:03:14 +0000[diff] [blame]234 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]235 DwarfStrSection =
236 Ctx->getMachOSection("__DWARF", "__debug_str",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]237 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]238 SectionKind::getMetadata());
239 DwarfLocSection =
240 Ctx->getMachOSection("__DWARF", "__debug_loc",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]241 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]242 SectionKind::getMetadata());
243 DwarfARangesSection =
244 Ctx->getMachOSection("__DWARF", "__debug_aranges",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]245 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]246 SectionKind::getMetadata());
247 DwarfRangesSection =
248 Ctx->getMachOSection("__DWARF", "__debug_ranges",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]249 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]250 SectionKind::getMetadata());
251 DwarfMacroInfoSection =
252 Ctx->getMachOSection("__DWARF", "__debug_macinfo",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]253 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]254 SectionKind::getMetadata());
255 DwarfDebugInlineSection =
256 Ctx->getMachOSection("__DWARF", "__debug_inlined",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]257 MachO::S_ATTR_DEBUG,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]258 SectionKind::getMetadata());
Lang Hames30789772013-11-08 22:14:49 +0000[diff] [blame]259 StackMapSection =
260 Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps", 0,
261 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]262
263 TLSExtraDataSection = TLSTLVSection;
264}
265
266void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]267 switch (T.getArch()) {
268 case Triple::mips:
269 case Triple::mipsel:
Rafael Espindolab9b7ae02013-04-03 03:13:19 +0000[diff] [blame]270 FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]271 break;
272 case Triple::mips64:
273 case Triple::mips64el:
Rafael Espindolab9b7ae02013-04-03 03:13:19 +0000[diff] [blame]274 FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]275 break;
276 default:
Rafael Espindolaef9d3492013-03-15 05:51:57 +0000[diff] [blame]277 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]278 break;
279 }
Rafael Espindolaef9d3492013-03-15 05:51:57 +0000[diff] [blame]280
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]281 switch (T.getArch()) {
Joerg Sonnenbergercf86ce12014-05-07 07:49:34 +0000[diff] [blame]282 case Triple::arm:
283 case Triple::armeb:
284 case Triple::thumb:
285 case Triple::thumbeb:
Joerg Sonnenberger94cbb662014-05-13 17:58:13 +0000[diff] [blame]286 if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)
287 break;
288 // Fallthrough if not using EHABI
Joerg Sonnenberger6637d4e2014-07-24 19:25:16 +0000[diff] [blame]289 case Triple::ppc:
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]290 case Triple::x86:
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]291 PersonalityEncoding = (RelocM == Reloc::PIC_)
Jim Grosbach0dde3492011-11-15 16:46:22 +0000[diff] [blame]292 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
293 : dwarf::DW_EH_PE_absptr;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]294 LSDAEncoding = (RelocM == Reloc::PIC_)
295 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
296 : dwarf::DW_EH_PE_absptr;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]297 TTypeEncoding = (RelocM == Reloc::PIC_)
Jim Grosbach0dde3492011-11-15 16:46:22 +0000[diff] [blame]298 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
299 : dwarf::DW_EH_PE_absptr;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]300 break;
301 case Triple::x86_64:
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]302 if (RelocM == Reloc::PIC_) {
303 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
304 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
305 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
306 LSDAEncoding = dwarf::DW_EH_PE_pcrel |
307 (CMModel == CodeModel::Small
308 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]309 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
310 ((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
311 ? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
312 } else {
313 PersonalityEncoding =
314 (CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
315 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
316 LSDAEncoding = (CMModel == CodeModel::Small)
317 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]318 TTypeEncoding = (CMModel == CodeModel::Small)
319 ? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
320 }
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]321 break;
322 case Triple::aarch64:
323 case Triple::aarch64_be:
Tim Northovere0e3aef2013-01-31 12:12:40 +0000[diff] [blame]324 // The small model guarantees static code/data size < 4GB, but not where it
325 // will be in memory. Most of these could end up >2GB away so even a signed
326 // pc-relative 32-bit address is insufficient, theoretically.
327 if (RelocM == Reloc::PIC_) {
328 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
329 dwarf::DW_EH_PE_sdata8;
330 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
Tim Northovere0e3aef2013-01-31 12:12:40 +0000[diff] [blame]331 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
332 dwarf::DW_EH_PE_sdata8;
333 } else {
334 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
335 LSDAEncoding = dwarf::DW_EH_PE_absptr;
Tim Northovere0e3aef2013-01-31 12:12:40 +0000[diff] [blame]336 TTypeEncoding = dwarf::DW_EH_PE_absptr;
337 }
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]338 break;
Logan Chienc0029812014-05-30 16:48:56 +0000[diff] [blame]339 case Triple::mips:
340 case Triple::mipsel:
341 // MIPS uses indirect pointer to refer personality functions, so that the
342 // eh_frame section can be read-only. DW.ref.personality will be generated
343 // for relocation.
344 PersonalityEncoding = dwarf::DW_EH_PE_indirect;
345 break;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]346 case Triple::ppc64:
347 case Triple::ppc64le:
Adhemerval Zanella1ae22482013-01-09 17:08:15 +0000[diff] [blame]348 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
349 dwarf::DW_EH_PE_udata8;
Adhemerval Zanella1ae22482013-01-09 17:08:15 +0000[diff] [blame]350 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
Adhemerval Zanella1ae22482013-01-09 17:08:15 +0000[diff] [blame]351 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
352 dwarf::DW_EH_PE_udata8;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]353 break;
354 case Triple::sparc:
Jakob Stoklund Olesen83c67732014-01-28 02:52:26 +0000[diff] [blame]355 if (RelocM == Reloc::PIC_) {
356 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
357 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
358 dwarf::DW_EH_PE_sdata4;
Jakob Stoklund Olesen83c67732014-01-28 02:52:26 +0000[diff] [blame]359 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
360 dwarf::DW_EH_PE_sdata4;
361 } else {
362 LSDAEncoding = dwarf::DW_EH_PE_absptr;
363 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
Jakob Stoklund Olesen83c67732014-01-28 02:52:26 +0000[diff] [blame]364 TTypeEncoding = dwarf::DW_EH_PE_absptr;
365 }
Joerg Sonnenbergerfa9cf652014-04-30 23:36:24 +0000[diff] [blame]366 break;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]367 case Triple::sparcv9:
Jakob Stoklund Olesen83c67732014-01-28 02:52:26 +0000[diff] [blame]368 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
369 if (RelocM == Reloc::PIC_) {
370 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
371 dwarf::DW_EH_PE_sdata4;
Jakob Stoklund Olesen83c67732014-01-28 02:52:26 +0000[diff] [blame]372 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
373 dwarf::DW_EH_PE_sdata4;
374 } else {
375 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
Jakob Stoklund Olesen83c67732014-01-28 02:52:26 +0000[diff] [blame]376 TTypeEncoding = dwarf::DW_EH_PE_absptr;
377 }
Joerg Sonnenbergerfa9cf652014-04-30 23:36:24 +0000[diff] [blame]378 break;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]379 case Triple::systemz:
Ulrich Weigand0213e7f2013-05-06 16:11:12 +0000[diff] [blame]380 // All currently-defined code models guarantee that 4-byte PC-relative
381 // values will be in range.
Ulrich Weigande7c6dfe2013-05-06 17:28:30 +0000[diff] [blame]382 if (RelocM == Reloc::PIC_) {
383 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
384 dwarf::DW_EH_PE_sdata4;
385 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
Ulrich Weigande7c6dfe2013-05-06 17:28:30 +0000[diff] [blame]386 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
387 dwarf::DW_EH_PE_sdata4;
388 } else {
389 PersonalityEncoding = dwarf::DW_EH_PE_absptr;
390 LSDAEncoding = dwarf::DW_EH_PE_absptr;
Ulrich Weigande7c6dfe2013-05-06 17:28:30 +0000[diff] [blame]391 TTypeEncoding = dwarf::DW_EH_PE_absptr;
392 }
Joerg Sonnenbergerfa9cf652014-04-30 23:36:24 +0000[diff] [blame]393 break;
Joerg Sonnenberger7c442522014-04-30 23:23:14 +0000[diff] [blame]394 default:
395 break;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]396 }
397
David Chisnall07f8d3e2012-02-17 17:31:15 +0000[diff] [blame]398 // Solaris requires different flags for .eh_frame to seemingly every other
399 // platform.
David Chisnallbbec8722012-04-10 11:44:33 +0000[diff] [blame]400 EHSectionType = ELF::SHT_PROGBITS;
David Chisnall07f8d3e2012-02-17 17:31:15 +0000[diff] [blame]401 EHSectionFlags = ELF::SHF_ALLOC;
David Chisnallbbec8722012-04-10 11:44:33 +0000[diff] [blame]402 if (T.getOS() == Triple::Solaris) {
403 if (T.getArch() == Triple::x86_64)
404 EHSectionType = ELF::SHT_X86_64_UNWIND;
405 else
406 EHSectionFlags |= ELF::SHF_WRITE;
407 }
David Chisnall07f8d3e2012-02-17 17:31:15 +0000[diff] [blame]408
409
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]410 // ELF
411 BSSSection =
412 Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
Anton Korobeynikov7722a2d2012-01-25 22:24:19 +0000[diff] [blame]413 ELF::SHF_WRITE | ELF::SHF_ALLOC,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]414 SectionKind::getBSS());
415
416 TextSection =
417 Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
418 ELF::SHF_EXECINSTR |
419 ELF::SHF_ALLOC,
420 SectionKind::getText());
421
422 DataSection =
423 Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
424 ELF::SHF_WRITE |ELF::SHF_ALLOC,
425 SectionKind::getDataRel());
426
427 ReadOnlySection =
428 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
429 ELF::SHF_ALLOC,
430 SectionKind::getReadOnly());
431
432 TLSDataSection =
433 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
434 ELF::SHF_ALLOC | ELF::SHF_TLS |
435 ELF::SHF_WRITE,
436 SectionKind::getThreadData());
437
438 TLSBSSSection =
439 Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
440 ELF::SHF_ALLOC | ELF::SHF_TLS |
441 ELF::SHF_WRITE,
442 SectionKind::getThreadBSS());
443
444 DataRelSection =
445 Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
446 ELF::SHF_ALLOC |ELF::SHF_WRITE,
447 SectionKind::getDataRel());
448
449 DataRelLocalSection =
450 Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
451 ELF::SHF_ALLOC |ELF::SHF_WRITE,
452 SectionKind::getDataRelLocal());
453
454 DataRelROSection =
455 Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
456 ELF::SHF_ALLOC |ELF::SHF_WRITE,
457 SectionKind::getReadOnlyWithRel());
458
459 DataRelROLocalSection =
460 Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
461 ELF::SHF_ALLOC |ELF::SHF_WRITE,
462 SectionKind::getReadOnlyWithRelLocal());
463
464 MergeableConst4Section =
465 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
466 ELF::SHF_ALLOC |ELF::SHF_MERGE,
467 SectionKind::getMergeableConst4());
468
469 MergeableConst8Section =
470 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
471 ELF::SHF_ALLOC |ELF::SHF_MERGE,
472 SectionKind::getMergeableConst8());
473
474 MergeableConst16Section =
475 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
476 ELF::SHF_ALLOC |ELF::SHF_MERGE,
477 SectionKind::getMergeableConst16());
478
479 StaticCtorSection =
480 Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
481 ELF::SHF_ALLOC |ELF::SHF_WRITE,
482 SectionKind::getDataRel());
483
484 StaticDtorSection =
485 Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
486 ELF::SHF_ALLOC |ELF::SHF_WRITE,
487 SectionKind::getDataRel());
488
489 // Exception Handling Sections.
490
491 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
492 // it contains relocatable pointers. In PIC mode, this is probably a big
493 // runtime hit for C++ apps. Either the contents of the LSDA need to be
494 // adjusted or this should be a data section.
495 LSDASection =
496 Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
497 ELF::SHF_ALLOC,
498 SectionKind::getReadOnly());
499
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]500 COFFDebugSymbolsSection = nullptr;
Timur Iskhodzhanovf166f6c2014-01-30 01:39:17 +0000[diff] [blame]501
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]502 // Debug Info Sections.
503 DwarfAbbrevSection =
504 Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
505 SectionKind::getMetadata());
506 DwarfInfoSection =
507 Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0,
508 SectionKind::getMetadata());
509 DwarfLineSection =
510 Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0,
511 SectionKind::getMetadata());
512 DwarfFrameSection =
513 Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0,
514 SectionKind::getMetadata());
Krzysztof Parzyszek228daa62013-02-12 18:00:14 +0000[diff] [blame]515 DwarfPubNamesSection =
516 Ctx->getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0,
517 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]518 DwarfPubTypesSection =
519 Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0,
520 SectionKind::getMetadata());
Eric Christopherb0e76942013-09-09 20:03:14 +0000[diff] [blame]521 DwarfGnuPubNamesSection =
522 Ctx->getELFSection(".debug_gnu_pubnames", ELF::SHT_PROGBITS, 0,
523 SectionKind::getMetadata());
524 DwarfGnuPubTypesSection =
525 Ctx->getELFSection(".debug_gnu_pubtypes", ELF::SHT_PROGBITS, 0,
526 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]527 DwarfStrSection =
Nick Lewycky1a62d782011-10-26 18:44:32 +0000[diff] [blame]528 Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
529 ELF::SHF_MERGE | ELF::SHF_STRINGS,
530 SectionKind::getMergeable1ByteCString());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]531 DwarfLocSection =
532 Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
533 SectionKind::getMetadata());
534 DwarfARangesSection =
535 Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0,
536 SectionKind::getMetadata());
537 DwarfRangesSection =
538 Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0,
539 SectionKind::getMetadata());
540 DwarfMacroInfoSection =
541 Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0,
542 SectionKind::getMetadata());
Eric Christopher27ed8ec2012-11-28 02:49:34 +0000[diff] [blame]543
544 // DWARF5 Experimental Debug Info
545
546 // Accelerator Tables
Eric Christophera0ad67d2012-10-08 21:41:30 +0000[diff] [blame]547 DwarfAccelNamesSection =
548 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0,
549 SectionKind::getMetadata());
550 DwarfAccelObjCSection =
551 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0,
552 SectionKind::getMetadata());
553 DwarfAccelNamespaceSection =
554 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0,
555 SectionKind::getMetadata());
556 DwarfAccelTypesSection =
557 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0,
558 SectionKind::getMetadata());
Eric Christopherc3b434b2012-11-28 02:49:38 +0000[diff] [blame]559
560 // Fission Sections
561 DwarfInfoDWOSection =
562 Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0,
563 SectionKind::getMetadata());
David Blaikie29459ae2014-07-25 17:11:58 +0000[diff] [blame]564 DwarfTypesDWOSection =
565 Ctx->getELFSection(".debug_types.dwo", ELF::SHT_PROGBITS, 0,
566 SectionKind::getMetadata());
Eric Christopher3c230092012-11-30 06:47:06 +0000[diff] [blame]567 DwarfAbbrevDWOSection =
568 Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0,
569 SectionKind::getMetadata());
570 DwarfStrDWOSection =
571 Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
572 ELF::SHF_MERGE | ELF::SHF_STRINGS,
573 SectionKind::getMergeable1ByteCString());
574 DwarfLineDWOSection =
575 Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0,
576 SectionKind::getMetadata());
577 DwarfLocDWOSection =
578 Ctx->getELFSection(".debug_loc.dwo", ELF::SHT_PROGBITS, 0,
579 SectionKind::getMetadata());
Eric Christopherc0fa8672013-01-04 17:59:22 +0000[diff] [blame]580 DwarfStrOffDWOSection =
581 Ctx->getELFSection(".debug_str_offsets.dwo", ELF::SHT_PROGBITS, 0,
582 SectionKind::getMetadata());
Eric Christopher962c9082013-01-15 23:56:56 +0000[diff] [blame]583 DwarfAddrSection =
584 Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0,
585 SectionKind::getMetadata());
Philip Reames76846182014-08-01 18:47:09 +0000[diff] [blame]586
587 StackMapSection =
588 Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS,
589 ELF::SHF_ALLOC,
590 SectionKind::getMetadata());
591
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]592}
593
594
595void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
Saleem Abdulrasool70a02062014-06-08 03:57:49 +0000[diff] [blame]596 bool IsWoA = T.getArch() == Triple::arm || T.getArch() == Triple::thumb;
597
David Majnemera9bdb322014-04-08 22:33:40 +0000[diff] [blame]598 // The object file format cannot represent common symbols with explicit
599 // alignments.
600 CommDirectiveSupportsAlignment = false;
601
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]602 // COFF
David Majnemer3d96acb2013-08-13 01:23:53 +0000[diff] [blame]603 BSSSection =
604 Ctx->getCOFFSection(".bss",
605 COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
606 COFF::IMAGE_SCN_MEM_READ |
607 COFF::IMAGE_SCN_MEM_WRITE,
608 SectionKind::getBSS());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]609 TextSection =
610 Ctx->getCOFFSection(".text",
Patrik Hagglundaad35e72014-06-09 07:35:07 +0000[diff] [blame]611 (IsWoA ? COFF::IMAGE_SCN_MEM_16BIT
612 : (COFF::SectionCharacteristics)0) |
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]613 COFF::IMAGE_SCN_CNT_CODE |
614 COFF::IMAGE_SCN_MEM_EXECUTE |
615 COFF::IMAGE_SCN_MEM_READ,
616 SectionKind::getText());
617 DataSection =
618 Ctx->getCOFFSection(".data",
619 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
620 COFF::IMAGE_SCN_MEM_READ |
621 COFF::IMAGE_SCN_MEM_WRITE,
622 SectionKind::getDataRel());
623 ReadOnlySection =
624 Ctx->getCOFFSection(".rdata",
625 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
626 COFF::IMAGE_SCN_MEM_READ,
627 SectionKind::getReadOnly());
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]628
Saleem Abdulrasooled7fc4b2014-06-08 00:34:27 +0000[diff] [blame]629 if (T.isKnownWindowsMSVCEnvironment() || T.isWindowsItaniumEnvironment()) {
Michael J. Spencerb560d072012-02-23 21:56:08 +0000[diff] [blame]630 StaticCtorSection =
631 Ctx->getCOFFSection(".CRT$XCU",
632 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
633 COFF::IMAGE_SCN_MEM_READ,
634 SectionKind::getReadOnly());
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]635 StaticDtorSection =
636 Ctx->getCOFFSection(".CRT$XTX",
637 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
638 COFF::IMAGE_SCN_MEM_READ,
639 SectionKind::getReadOnly());
Michael J. Spencerb560d072012-02-23 21:56:08 +0000[diff] [blame]640 } else {
641 StaticCtorSection =
642 Ctx->getCOFFSection(".ctors",
643 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
644 COFF::IMAGE_SCN_MEM_READ |
645 COFF::IMAGE_SCN_MEM_WRITE,
646 SectionKind::getDataRel());
Anton Korobeynikov37d73002012-09-23 15:53:47 +0000[diff] [blame]647 StaticDtorSection =
648 Ctx->getCOFFSection(".dtors",
649 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
650 COFF::IMAGE_SCN_MEM_READ |
651 COFF::IMAGE_SCN_MEM_WRITE,
652 SectionKind::getDataRel());
653 }
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]654
655 // FIXME: We're emitting LSDA info into a readonly section on COFF, even
656 // though it contains relocatable pointers. In PIC mode, this is probably a
657 // big runtime hit for C++ apps. Either the contents of the LSDA need to be
658 // adjusted or this should be a data section.
NAKAMURA Takumi1db59952014-06-25 12:41:52 +0000[diff] [blame]659 assert(T.isOSWindows() && "Windows is the only supported COFF target");
660 if (T.getArch() == Triple::x86_64) {
661 // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
662 LSDASection = 0;
663 } else {
664 LSDASection = Ctx->getCOFFSection(".gcc_except_table",
665 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
666 COFF::IMAGE_SCN_MEM_READ,
667 SectionKind::getReadOnly());
668 }
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]669
670 // Debug info.
Timur Iskhodzhanov31377c52014-01-28 03:48:44 +0000[diff] [blame]671 COFFDebugSymbolsSection =
672 Ctx->getCOFFSection(".debug$S",
673 COFF::IMAGE_SCN_MEM_DISCARDABLE |
674 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
675 COFF::IMAGE_SCN_MEM_READ,
676 SectionKind::getMetadata());
677
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]678 DwarfAbbrevSection =
679 Ctx->getCOFFSection(".debug_abbrev",
680 COFF::IMAGE_SCN_MEM_DISCARDABLE |
681 COFF::IMAGE_SCN_MEM_READ,
682 SectionKind::getMetadata());
683 DwarfInfoSection =
684 Ctx->getCOFFSection(".debug_info",
685 COFF::IMAGE_SCN_MEM_DISCARDABLE |
686 COFF::IMAGE_SCN_MEM_READ,
687 SectionKind::getMetadata());
688 DwarfLineSection =
689 Ctx->getCOFFSection(".debug_line",
690 COFF::IMAGE_SCN_MEM_DISCARDABLE |
691 COFF::IMAGE_SCN_MEM_READ,
692 SectionKind::getMetadata());
693 DwarfFrameSection =
694 Ctx->getCOFFSection(".debug_frame",
695 COFF::IMAGE_SCN_MEM_DISCARDABLE |
696 COFF::IMAGE_SCN_MEM_READ,
697 SectionKind::getMetadata());
Krzysztof Parzyszek228daa62013-02-12 18:00:14 +0000[diff] [blame]698 DwarfPubNamesSection =
699 Ctx->getCOFFSection(".debug_pubnames",
700 COFF::IMAGE_SCN_MEM_DISCARDABLE |
701 COFF::IMAGE_SCN_MEM_READ,
702 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]703 DwarfPubTypesSection =
704 Ctx->getCOFFSection(".debug_pubtypes",
705 COFF::IMAGE_SCN_MEM_DISCARDABLE |
706 COFF::IMAGE_SCN_MEM_READ,
707 SectionKind::getMetadata());
NAKAMURA Takumi0229e352013-09-10 06:01:56 +0000[diff] [blame]708 DwarfGnuPubNamesSection =
Eric Christopherb0e76942013-09-09 20:03:14 +0000[diff] [blame]709 Ctx->getCOFFSection(".debug_gnu_pubnames",
710 COFF::IMAGE_SCN_MEM_DISCARDABLE |
711 COFF::IMAGE_SCN_MEM_READ,
712 SectionKind::getMetadata());
NAKAMURA Takumi0229e352013-09-10 06:01:56 +0000[diff] [blame]713 DwarfGnuPubTypesSection =
Eric Christopherb0e76942013-09-09 20:03:14 +0000[diff] [blame]714 Ctx->getCOFFSection(".debug_gnu_pubtypes",
715 COFF::IMAGE_SCN_MEM_DISCARDABLE |
716 COFF::IMAGE_SCN_MEM_READ,
717 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]718 DwarfStrSection =
719 Ctx->getCOFFSection(".debug_str",
720 COFF::IMAGE_SCN_MEM_DISCARDABLE |
721 COFF::IMAGE_SCN_MEM_READ,
722 SectionKind::getMetadata());
723 DwarfLocSection =
724 Ctx->getCOFFSection(".debug_loc",
725 COFF::IMAGE_SCN_MEM_DISCARDABLE |
726 COFF::IMAGE_SCN_MEM_READ,
727 SectionKind::getMetadata());
728 DwarfARangesSection =
729 Ctx->getCOFFSection(".debug_aranges",
730 COFF::IMAGE_SCN_MEM_DISCARDABLE |
731 COFF::IMAGE_SCN_MEM_READ,
732 SectionKind::getMetadata());
733 DwarfRangesSection =
734 Ctx->getCOFFSection(".debug_ranges",
735 COFF::IMAGE_SCN_MEM_DISCARDABLE |
736 COFF::IMAGE_SCN_MEM_READ,
737 SectionKind::getMetadata());
738 DwarfMacroInfoSection =
739 Ctx->getCOFFSection(".debug_macinfo",
740 COFF::IMAGE_SCN_MEM_DISCARDABLE |
741 COFF::IMAGE_SCN_MEM_READ,
742 SectionKind::getMetadata());
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]743 DwarfInfoDWOSection =
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]744 Ctx->getCOFFSection(".debug_info.dwo",
745 COFF::IMAGE_SCN_MEM_DISCARDABLE |
746 COFF::IMAGE_SCN_MEM_READ,
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]747 SectionKind::getMetadata());
David Blaikie29459ae2014-07-25 17:11:58 +0000[diff] [blame]748 DwarfTypesDWOSection =
749 Ctx->getCOFFSection(".debug_types.dwo", COFF::IMAGE_SCN_MEM_DISCARDABLE |
750 COFF::IMAGE_SCN_MEM_READ,
751 SectionKind::getMetadata());
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]752 DwarfAbbrevDWOSection =
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]753 Ctx->getCOFFSection(".debug_abbrev.dwo",
754 COFF::IMAGE_SCN_MEM_DISCARDABLE |
755 COFF::IMAGE_SCN_MEM_READ,
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]756 SectionKind::getMetadata());
757 DwarfStrDWOSection =
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]758 Ctx->getCOFFSection(".debug_str.dwo",
759 COFF::IMAGE_SCN_MEM_DISCARDABLE |
760 COFF::IMAGE_SCN_MEM_READ,
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]761 SectionKind::getMetadata());
762 DwarfLineDWOSection =
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]763 Ctx->getCOFFSection(".debug_line.dwo",
764 COFF::IMAGE_SCN_MEM_DISCARDABLE |
765 COFF::IMAGE_SCN_MEM_READ,
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]766 SectionKind::getMetadata());
767 DwarfLocDWOSection =
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]768 Ctx->getCOFFSection(".debug_loc.dwo",
769 COFF::IMAGE_SCN_MEM_DISCARDABLE |
770 COFF::IMAGE_SCN_MEM_READ,
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]771 SectionKind::getMetadata());
772 DwarfStrOffDWOSection =
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]773 Ctx->getCOFFSection(".debug_str_offsets.dwo",
774 COFF::IMAGE_SCN_MEM_DISCARDABLE |
775 COFF::IMAGE_SCN_MEM_READ,
David Blaikie62dd7df2014-03-26 03:05:10 +0000[diff] [blame]776 SectionKind::getMetadata());
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]777
778 DwarfAddrSection =
779 Ctx->getCOFFSection(".debug_addr",
780 COFF::IMAGE_SCN_MEM_DISCARDABLE |
781 COFF::IMAGE_SCN_MEM_READ,
782 SectionKind::getMetadata());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]783
784 DrectveSection =
785 Ctx->getCOFFSection(".drectve",
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]786 COFF::IMAGE_SCN_LNK_INFO |
787 COFF::IMAGE_SCN_LNK_REMOVE,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]788 SectionKind::getMetadata());
789
790 PDataSection =
791 Ctx->getCOFFSection(".pdata",
792 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
Anton Korobeynikovcc8c5392012-08-08 12:46:46 +0000[diff] [blame]793 COFF::IMAGE_SCN_MEM_READ,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]794 SectionKind::getDataRel());
795
796 XDataSection =
797 Ctx->getCOFFSection(".xdata",
798 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
Anton Korobeynikovcc8c5392012-08-08 12:46:46 +0000[diff] [blame]799 COFF::IMAGE_SCN_MEM_READ,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]800 SectionKind::getDataRel());
Saleem Abdulrasoola35f04a2014-06-08 00:34:23 +0000[diff] [blame]801
Anton Korobeynikovc6b40172012-02-11 17:26:53 +0000[diff] [blame]802 TLSDataSection =
803 Ctx->getCOFFSection(".tls$",
804 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
805 COFF::IMAGE_SCN_MEM_READ |
806 COFF::IMAGE_SCN_MEM_WRITE,
807 SectionKind::getDataRel());
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]808}
809
Saleem Abdulrasoolbdbc0082014-06-22 22:25:01 +0000[diff] [blame]810void MCObjectFileInfo::InitMCObjectFileInfo(StringRef T, Reloc::Model relocm,
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]811 CodeModel::Model cm,
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]812 MCContext &ctx) {
813 RelocM = relocm;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]814 CMModel = cm;
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]815 Ctx = &ctx;
816
817 // Common.
818 CommDirectiveSupportsAlignment = true;
819 SupportsWeakOmittedEHFrame = true;
Tim Northoverd1c6f512014-03-29 09:03:13 +0000[diff] [blame]820 SupportsCompactUnwindWithoutEHFrame = false;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]821
Rafael Espindolaaa7851d2014-05-12 13:47:05 +0000[diff] [blame]822 PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =
823 dwarf::DW_EH_PE_absptr;
Evan Chengbbf3b0d2011-07-20 19:50:42 +0000[diff] [blame]824
Bill Wendling2d1df6b2013-04-10 21:42:06 +0000[diff] [blame]825 CompactUnwindDwarfEHFrameOnly = 0;
826
Craig Topperbb694de2014-04-13 04:57:38 +0000[diff] [blame]827 EHFrameSection = nullptr; // Created on demand.
828 CompactUnwindSection = nullptr; // Used only by selected targets.
829 DwarfAccelNamesSection = nullptr; // Used only by selected targets.
830 DwarfAccelObjCSection = nullptr; // Used only by selected targets.
831 DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
832 DwarfAccelTypesSection = nullptr; // Used only by selected targets.
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]833
Saleem Abdulrasoolbdbc0082014-06-22 22:25:01 +0000[diff] [blame]834 TT = Triple(T);
835
836 Triple::ArchType Arch = TT.getArch();
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]837 // FIXME: Checking for Arch here to filter out bogus triples such as
838 // cellspu-apple-darwin. Perhaps we should fix in Triple?
839 if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
840 Arch == Triple::arm || Arch == Triple::thumb ||
Tim Northovere19bed72014-07-23 12:32:47 +0000[diff] [blame]841 Arch == Triple::aarch64 ||
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]842 Arch == Triple::ppc || Arch == Triple::ppc64 ||
843 Arch == Triple::UnknownArch) &&
Saleem Abdulrasoolbdbc0082014-06-22 22:25:01 +0000[diff] [blame]844 (TT.isOSDarwin() || TT.isOSBinFormatMachO())) {
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]845 Env = IsMachO;
Saleem Abdulrasoolbdbc0082014-06-22 22:25:01 +0000[diff] [blame]846 InitMachOMCObjectFileInfo(TT);
Saleem Abdulrasoolffdb92a702014-04-27 04:54:16 +0000[diff] [blame]847 } else if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
848 Arch == Triple::arm || Arch == Triple::thumb) &&
Saleem Abdulrasoolbdbc0082014-06-22 22:25:01 +0000[diff] [blame]849 (TT.isOSWindows() && TT.getObjectFormat() == Triple::COFF)) {
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]850 Env = IsCOFF;
Saleem Abdulrasoolbdbc0082014-06-22 22:25:01 +0000[diff] [blame]851 InitCOFFMCObjectFileInfo(TT);
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]852 } else {
853 Env = IsELF;
Saleem Abdulrasoolbdbc0082014-06-22 22:25:01 +0000[diff] [blame]854 InitELFMCObjectFileInfo(TT);
Evan Cheng76792992011-07-20 05:58:47 +0000[diff] [blame]855 }
856}
857
David Blaikiebc563272013-12-13 21:33:40 +0000[diff] [blame]858const MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
859 return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
860 SectionKind::getMetadata(), 0, utostr(Hash));
861}
862
David Chisnall85dd3092012-02-17 16:51:02 +0000[diff] [blame]863void MCObjectFileInfo::InitEHFrameSection() {
864 if (Env == IsMachO)
865 EHFrameSection =
866 Ctx->getMachOSection("__TEXT", "__eh_frame",
David Majnemer7b583052014-03-07 07:36:05 +0000[diff] [blame]867 MachO::S_COALESCED |
868 MachO::S_ATTR_NO_TOC |
869 MachO::S_ATTR_STRIP_STATIC_SYMS |
870 MachO::S_ATTR_LIVE_SUPPORT,
David Chisnall85dd3092012-02-17 16:51:02 +0000[diff] [blame]871 SectionKind::getReadOnly());
872 else if (Env == IsELF)
873 EHFrameSection =
David Chisnallbbec8722012-04-10 11:44:33 +0000[diff] [blame]874 Ctx->getELFSection(".eh_frame", EHSectionType,
David Chisnall07f8d3e2012-02-17 17:31:15 +0000[diff] [blame]875 EHSectionFlags,
David Chisnall85dd3092012-02-17 16:51:02 +0000[diff] [blame]876 SectionKind::getDataRel());
877 else
878 EHFrameSection =
879 Ctx->getCOFFSection(".eh_frame",
880 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
881 COFF::IMAGE_SCN_MEM_READ |
882 COFF::IMAGE_SCN_MEM_WRITE,
883 SectionKind::getDataRel());
884}