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