e8d9df4ea5
The non lazy atoms generated in the stubs pass use an image cache to hold all of the pointers. On arm archs, this is the __got section, but on x86 archs it should be __nl_symbol_ptr. rdar://problem/24572729 llvm-svn: 260271
102 lines
2.5 KiB
C++
102 lines
2.5 KiB
C++
//===- DefinedAtom.cpp ------------------------------------------*- C++ -*-===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/ErrorHandling.h"
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#include "lld/Core/DefinedAtom.h"
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#include "lld/Core/File.h"
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namespace lld {
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DefinedAtom::ContentPermissions DefinedAtom::permissions() const {
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// By default base permissions on content type.
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return permissions(this->contentType());
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}
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// Utility function for deriving permissions from content type
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DefinedAtom::ContentPermissions DefinedAtom::permissions(ContentType type) {
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switch (type) {
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case typeCode:
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case typeResolver:
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case typeBranchIsland:
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case typeBranchShim:
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case typeStub:
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case typeStubHelper:
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case typeMachHeader:
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return permR_X;
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case typeConstant:
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case typeCString:
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case typeUTF16String:
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case typeCFI:
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case typeLSDA:
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case typeLiteral4:
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case typeLiteral8:
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case typeLiteral16:
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case typeDTraceDOF:
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case typeCompactUnwindInfo:
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case typeProcessedUnwindInfo:
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case typeRONote:
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case typeNoAlloc:
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case typeObjCImageInfo:
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case typeObjCMethodList:
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return permR__;
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case typeData:
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case typeDataFast:
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case typeZeroFill:
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case typeZeroFillFast:
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case typeObjC1Class:
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case typeLazyPointer:
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case typeLazyDylibPointer:
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case typeNonLazyPointer:
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case typeThunkTLV:
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case typeRWNote:
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return permRW_;
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case typeGOT:
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case typeConstData:
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case typeCFString:
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case typeInitializerPtr:
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case typeTerminatorPtr:
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case typeCStringPtr:
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case typeObjCClassPtr:
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case typeObjC2CategoryList:
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case typeInterposingTuples:
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case typeTLVInitialData:
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case typeTLVInitialZeroFill:
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case typeTLVInitializerPtr:
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case typeThreadData:
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case typeThreadZeroFill:
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return permRW_L;
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case typeGroupComdat:
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case typeGnuLinkOnce:
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case typeUnknown:
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case typeTempLTO:
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case typeSectCreate:
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case typeDSOHandle:
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return permUnknown;
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}
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llvm_unreachable("unknown content type");
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}
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bool DefinedAtom::compareByPosition(const DefinedAtom *lhs,
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const DefinedAtom *rhs) {
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if (lhs == rhs)
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return false;
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const File *lhsFile = &lhs->file();
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const File *rhsFile = &rhs->file();
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if (lhsFile->ordinal() != rhsFile->ordinal())
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return lhsFile->ordinal() < rhsFile->ordinal();
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assert(lhs->ordinal() != rhs->ordinal());
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return lhs->ordinal() < rhs->ordinal();
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}
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} // namespace
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