llvm/lib/ExecutionEngine/Orc/Shared/ObjectFormats.cpp

   1 //===---------- ObjectFormats.cpp - Object format details for ORC ---------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // ORC-specific object format details.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm/ExecutionEngine/Orc/Shared/ObjectFormats.h"
  14
  15 namespace llvm {
  16 namespace orc {
  17
  18 StringRef MachODataCommonSectionName = "__DATA,__common";
  19 StringRef MachODataDataSectionName = "__DATA,__data";
  20 StringRef MachOEHFrameSectionName = "__TEXT,__eh_frame";
  21 StringRef MachOCompactUnwindInfoSectionName = "__TEXT,__unwind_info";
  22 StringRef MachOCStringSectionName = "__TEXT,__cstring";
  23 StringRef MachOModInitFuncSectionName = "__DATA,__mod_init_func";
  24 StringRef MachOObjCCatListSectionName = "__DATA,__objc_catlist";
  25 StringRef MachOObjCCatList2SectionName = "__DATA,__objc_catlist2";
  26 StringRef MachOObjCClassListSectionName = "__DATA,__objc_classlist";
  27 StringRef MachOObjCClassNameSectionName = "__TEXT,__objc_classname";
  28 StringRef MachOObjCClassRefsSectionName = "__DATA,__objc_classrefs";
  29 StringRef MachOObjCConstSectionName = "__DATA,__objc_const";
  30 StringRef MachOObjCDataSectionName = "__DATA,__objc_data";
  31 StringRef MachOObjCImageInfoSectionName = "__DATA,__objc_imageinfo";
  32 StringRef MachOObjCMethNameSectionName = "__TEXT,__objc_methname";
  33 StringRef MachOObjCMethTypeSectionName = "__TEXT,__objc_methtype";
  34 StringRef MachOObjCNLCatListSectionName = "__DATA,__objc_nlcatlist";
  35 StringRef MachOObjCSelRefsSectionName = "__DATA,__objc_selrefs";
  36 StringRef MachOSwift5ProtoSectionName = "__TEXT,__swift5_proto";
  37 StringRef MachOSwift5ProtosSectionName = "__TEXT,__swift5_protos";
  38 StringRef MachOSwift5TypesSectionName = "__TEXT,__swift5_types";
  39 StringRef MachOSwift5TypeRefSectionName = "__TEXT,__swift5_typeref";
  40 StringRef MachOSwift5FieldMetadataSectionName = "__TEXT,__swift5_fieldmd";
  41 StringRef MachOSwift5EntrySectionName = "__TEXT,__swift5_entry";
  42 StringRef MachOThreadBSSSectionName = "__DATA,__thread_bss";
  43 StringRef MachOThreadDataSectionName = "__DATA,__thread_data";
  44 StringRef MachOThreadVarsSectionName = "__DATA,__thread_vars";
  45
  46 StringRef MachOInitSectionNames[19] = {
  47     MachOModInitFuncSectionName,   MachOObjCCatListSectionName,
  48     MachOObjCCatList2SectionName,  MachOObjCClassListSectionName,
  49     MachOObjCClassNameSectionName, MachOObjCClassRefsSectionName,
  50     MachOObjCConstSectionName,     MachOObjCDataSectionName,
  51     MachOObjCImageInfoSectionName, MachOObjCMethNameSectionName,
  52     MachOObjCMethTypeSectionName,  MachOObjCNLCatListSectionName,
  53     MachOObjCSelRefsSectionName,   MachOSwift5ProtoSectionName,
  54     MachOSwift5ProtosSectionName,  MachOSwift5TypesSectionName,
  55     MachOSwift5TypeRefSectionName, MachOSwift5FieldMetadataSectionName,
  56     MachOSwift5EntrySectionName,
  57 };
  58
  59 StringRef ELFEHFrameSectionName = ".eh_frame";
  60
  61 StringRef ELFInitArrayFuncSectionName = ".init_array";
  62 StringRef ELFInitFuncSectionName = ".init";
  63 StringRef ELFFiniArrayFuncSectionName = ".fini_array";
  64 StringRef ELFFiniFuncSectionName = ".fini";
  65 StringRef ELFCtorArrayFuncSectionName = ".ctors";
  66 StringRef ELFDtorArrayFuncSectionName = ".dtors";
  67
  68 StringRef ELFInitSectionNames[3]{
  69     ELFInitArrayFuncSectionName,
  70     ELFInitFuncSectionName,
  71     ELFCtorArrayFuncSectionName,
  72 };
  73
  74 StringRef ELFThreadBSSSectionName = ".tbss";
  75 StringRef ELFThreadDataSectionName = ".tdata";
  76
  77 bool isMachOInitializerSection(StringRef SegName, StringRef SecName) {
  78   for (auto &InitSection : MachOInitSectionNames) {
  79     // Loop below assumes all MachO init sectios have a length-6
  80     // segment name.
  81     assert(InitSection[6] == ',' && "Init section seg name has length != 6");
  82     if (InitSection.starts_with(SegName) && InitSection.substr(7) == SecName)
  83       return true;
  84   }
  85   return false;
  86 }
  87
  88 bool isMachOInitializerSection(StringRef QualifiedName) {
  89   for (auto &InitSection : MachOInitSectionNames)
  90     if (InitSection == QualifiedName)
  91       return true;
  92   return false;
  93 }
  94
  95 bool isELFInitializerSection(StringRef SecName) {
  96   for (StringRef InitSection : ELFInitSectionNames) {
  97     StringRef Name = SecName;
  98     if (Name.consume_front(InitSection) && (Name.empty() || Name[0] == '.'))
  99       return true;
 100   }
 101   return false;
 102 }
 103
 104 bool isCOFFInitializerSection(StringRef SecName) {
 105   return SecName.starts_with(".CRT");
 106 }
 107
 108 } // namespace orc
 109 } // namespace llvm