1 //===--------- SectCreate.cpp - Emulate ld64's -sectcreate option ---------===// 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 #include "llvm/ExecutionEngine/Orc/SectCreate.h" 10 11 #define DEBUG_TYPE "orc" 12 13 using namespace llvm::jitlink; 14 15 namespace llvm::orc { 16 17 void SectCreateMaterializationUnit::materialize( 18 std::unique_ptr<MaterializationResponsibility> R) { 19 auto G = std::make_unique<LinkGraph>( 20 "orc_sectcreate_" + SectName, 21 ObjLinkingLayer.getExecutionSession().getSymbolStringPool(), 22 ObjLinkingLayer.getExecutionSession().getTargetTriple(), 23 SubtargetFeatures(), getGenericEdgeKindName); 24 25 auto &Sect = G->createSection(SectName, MP); 26 auto Content = G->allocateContent( 27 ArrayRef<char>(Data->getBuffer().data(), Data->getBuffer().size())); 28 auto &B = G->createContentBlock(Sect, Content, ExecutorAddr(), Alignment, 0); 29 30 for (auto &[Name, Info] : ExtraSymbols) { 31 auto L = Info.Flags.isStrong() ? Linkage::Strong : Linkage::Weak; 32 auto S = Info.Flags.isExported() ? Scope::Default : Scope::Hidden; 33 G->addDefinedSymbol(B, Info.Offset, *Name, 0, L, S, Info.Flags.isCallable(), 34 true); 35 } 36 37 ObjLinkingLayer.emit(std::move(R), std::move(G)); 38 } 39 40 void SectCreateMaterializationUnit::discard(const JITDylib &JD, 41 const SymbolStringPtr &Name) { 42 ExtraSymbols.erase(Name); 43 } 44 45 MaterializationUnit::Interface SectCreateMaterializationUnit::getInterface( 46 const ExtraSymbolsMap &ExtraSymbols) { 47 SymbolFlagsMap SymbolFlags; 48 for (auto &[Name, Info] : ExtraSymbols) 49 SymbolFlags[Name] = Info.Flags; 50 return {std::move(SymbolFlags), nullptr}; 51 } 52 53 } // End namespace llvm::orc. 54