1 //===-- XCOFFDump.cpp - XCOFF-specific dumper -----------------------------===//
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 /// \file
10 /// This file implements the XCOFF-specific dumper for llvm-objdump.
11 ///
12 //===----------------------------------------------------------------------===//
13 
14 #include "XCOFFDump.h"
15 #include "llvm/MC/MCDisassembler/MCDisassembler.h"
16 
17 using namespace llvm;
18 using namespace llvm::object;
19 
20 Error objdump::getXCOFFRelocationValueString(const XCOFFObjectFile *Obj,
21                                              const RelocationRef &Rel,
22                                              SmallVectorImpl<char> &Result) {
23   symbol_iterator SymI = Rel.getSymbol();
24   if (SymI == Obj->symbol_end())
25     return make_error<GenericBinaryError>(
26         "invalid symbol reference in relocation entry",
27         object_error::parse_failed);
28 
29   Expected<StringRef> SymNameOrErr = SymI->getName();
30   if (!SymNameOrErr)
31     return SymNameOrErr.takeError();
32   StringRef SymName = *SymNameOrErr;
33   Result.append(SymName.begin(), SymName.end());
34   return Error::success();
35 }
36 
37 Optional<XCOFF::StorageMappingClass>
38 objdump::getXCOFFSymbolCsectSMC(const XCOFFObjectFile *Obj,
39                                 const SymbolRef &Sym) {
40   XCOFFSymbolRef SymRef(Sym.getRawDataRefImpl(), Obj);
41 
42   if (SymRef.hasCsectAuxEnt())
43     return SymRef.getXCOFFCsectAuxEnt32()->StorageMappingClass;
44 
45   return None;
46 }
47 
48 bool objdump::isLabel(const XCOFFObjectFile *Obj, const SymbolRef &Sym) {
49 
50   XCOFFSymbolRef SymRef(Sym.getRawDataRefImpl(), Obj);
51 
52   if (SymRef.hasCsectAuxEnt())
53     return SymRef.getXCOFFCsectAuxEnt32()->isLabel();
54 
55   return false;
56 }
57 
58 void objdump::printXCOFFSymbolDescription(const SymbolInfoTy &SymbolInfo,
59                                           StringRef SymbolName) {
60   assert(SymbolInfo.isXCOFF() && "Must be a XCOFFSymInfo.");
61 
62   // Dummy symbols have no symbol index.
63   if (SymbolInfo.XCOFFSymInfo.Index)
64     outs() << "(idx: " << SymbolInfo.XCOFFSymInfo.Index.getValue() << ") ";
65 
66   outs() << SymbolName;
67 
68   if (SymbolInfo.XCOFFSymInfo.StorageMappingClass &&
69       !SymbolInfo.XCOFFSymInfo.IsLabel) {
70     const XCOFF::StorageMappingClass Smc =
71         SymbolInfo.XCOFFSymInfo.StorageMappingClass.getValue();
72     outs() << "[" << XCOFF::getMappingClassString(Smc) << "]";
73   }
74 }
75