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//===- DefinedAtom.cpp ------------------------------------------*- C++ -*-===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/ErrorHandling.h"
#include "lld/Core/DefinedAtom.h"
#include "lld/Core/File.h"
namespace lld {
DefinedAtom::ContentPermissions DefinedAtom::permissions() const {
// By default base permissions on content type.
return permissions(this->contentType());
}
// Utility function for deriving permissions from content type
DefinedAtom::ContentPermissions DefinedAtom::permissions(ContentType type) {
switch (type) {
case typeCode:
case typeResolver:
case typeBranchIsland:
case typeBranchShim:
case typeStub:
case typeStubHelper:
case typeMachHeader:
return permR_X;
case typeConstant:
case typeCString:
case typeUTF16String:
case typeCFI:
case typeLSDA:
case typeLiteral4:
case typeLiteral8:
case typeLiteral16:
case typeDTraceDOF:
case typeCompactUnwindInfo:
case typeProcessedUnwindInfo:
case typeRONote:
case typeNoAlloc:
return permR__;
case typeData:
case typeDataFast:
case typeZeroFill:
case typeZeroFillFast:
case typeObjC1Class:
case typeLazyPointer:
case typeLazyDylibPointer:
case typeThunkTLV:
case typeRWNote:
return permRW_;
case typeGOT:
case typeConstData:
case typeCFString:
case typeInitializerPtr:
case typeTerminatorPtr:
case typeCStringPtr:
case typeObjCClassPtr:
case typeObjC2CategoryList:
case typeInterposingTuples:
case typeTLVInitialData:
case typeTLVInitialZeroFill:
case typeTLVInitializerPtr:
case typeThreadData:
case typeThreadZeroFill:
return permRW_L;
case typeGroupComdat:
case typeGnuLinkOnce:
case typeUnknown:
case typeTempLTO:
case typeSectCreate:
return permUnknown;
}
llvm_unreachable("unknown content type");
}
bool DefinedAtom::compareByPosition(const DefinedAtom *lhs,
const DefinedAtom *rhs) {
if (lhs == rhs)
return false;
const File *lhsFile = &lhs->file();
const File *rhsFile = &rhs->file();
if (lhsFile->ordinal() != rhsFile->ordinal())
return lhsFile->ordinal() < rhsFile->ordinal();
assert(lhs->ordinal() != rhs->ordinal());
return lhs->ordinal() < rhs->ordinal();
}
} // namespace
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